Patent Publication Number: US-6984161-B2

Title: Lens grinding processing apparatus

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a drilling processing apparatus for a rimless lens and a lens grinding processing apparatus to grind and process an edge of a lens for a point frame (hereinafter, abbreviated as rimless lens) and to drill a hole for fixing the point frame. 
   2. Description of the Prior Art 
   Conventionally, for example, there has been well known a lens grinding processing apparatus (see Japanese Patent Laid Open Nos. H8-155945 and 2000-218487 or the like) which automatically drills a hole to fix a frame for a point frame and grinds and processes an edge of a lens for the point frame (rimless lens), or a drilling processing apparatus for the rimless lens for drilling a hole for fixing the point frame (see Japanese Patent Laid Open Nos. H8-155806, H9-290399 and H11-10427). 
   In these cases, since a size of an attachment for fixing the point frame to the rimless lens is not constant, a size of a diameter of a hole drilled into the rimless lens has to be changed as well. 
   Also, relating to a lens holding member which contacts with a refractive surface of an eyeglass lens by pressure, there have been well known a lens grinding processing apparatus utilizing an universal joint (see Japanese Patent Publication No. S54-11032, Japanese Patent Laid Open Nos. S57-201160, H9-225798 and 2002-370146, U.S. Pat. No. 6,231,433, EP Laid Open No. 995546A1 or the like). 
   However, in the conventional arts as above mentioned, they are difficult to retain a main shaft of a tool such as a drill for a drilling in substantially perpendicular to the refractive surface of the rimless lens by only a movement of the tool, and they are likely to occur a grow in size of a device if attempting to provide the main shaft of the tool so as to be in substantially perpendicular to the refractive surface of the rimless lens. 
   In addition, when the refractive surface of the rimless lens is provided so as to be in substantially perpendicular to the main shaft of the tool by merely inclining a lens rotating shaft itself which holds the rimless lens, the device cannot help being complicated and large scaled in size. 
   Furthermore, according to the conventional arts, because the hole for fixing the frame cannot be drilled in substantially perpendicular to the refractive surface of the rimless lens, the attachment for fixing cannot be attached in fine appearance, as a result, the point frame which an eyeglasses wearer desires cannot be attained. 
   Also, in the conventional lens grinding processing apparatus utilizing the universal joint as stated above, because it is structured that a lens absorption member is fixed at one part of an opposed end section of a pair of lens rotating shafts and a lens retainer utilizing the universal joint is fixed at the other part of the opposed end section of the pair of lens rotating shafts so that the lens retainer is attached along the refractive surface of the eyeglass lens fixed to the lens absorption member, a slanting and adjusting of the eyeglass lens cannot be carried out when the eyeglass lens is held by the lens absorption member and the lens retainer. 
   As stated, since the slanting and adjusting of the eyeglass lens cannot be carried out, it was extremely difficult to fine adjust the curved refractive surface of the eyeglass lens in perpendicular to the main shaft of the tool. 
   SUMMERY OF THE INVENTION 
   Therefore, to solve the above mentioned problems, an object of the present invention is to provide a lens grinding processing apparatus which has a structure to have a drilling part of a refractive surface of an eyeglass lens so as to be in substantially perpendicular to a main shaft of a drilling device such as a drill for a drilling or the like by a simple structure. 
   To accomplish the above mentioned object, a lens grinding processing apparatus of the present invention has an apparatus main body, a pair of lens rotating shafts rotatably provided in the apparatus main body capable of relatively approaching and separating adjustably on a same axis for holding an eyeglass lens, a shaft rotating driving device for rotating and driving the pair of lens rotating shafts, lens retaining members fixed to opposed end sections of the pair of lens rotating shafts respectively capable of slanting adjustably for slant-ably holding the eyeglass lens between the pair of lens rotating shafts, a drilling device for drilling a hole for a point frame into the eyeglass lens held between the lens retaining members, a grinding stone rotatably provided capable of relatively approaching and separating to the lens rotating shafts, a shaft-to-shaft distance variable device for changing a shaft-to-shaft distance between the lens rotating shafts and the grinding stone by relatively approaching and separating the lens rotating shafts and the grinding stone, and an arithmetic control circuit for adjusting the shaft-to-shaft distance between the lens rotating shafts and the grinding stone by controlling the shaft rotating driving device and the shaft-to-shaft distance variable device in motion based on lens shape information (θi, ρi). 
   According to this structure, the hole for fixing a frame can be drilled into the refractive surface of the eyeglass lens in substantially perpendicular to the main shaft of the drilling device such as the drill for the drilling or the like, as a result, an attachment for fixing can be attached in fine appearance. 
   Also, each of the lens retaining members can be provided with a spheroid joint or a spheroid connection for slant-ably retaining the eyeglass lens. Furthermore, the spheroid joint or the spheroid connection can be provided with a movable portion which enables the eyeglass lens to be slanted and adjusted in a condition when the lens retaining members hold the eyeglass lens with a clamping force in a setting range smaller than a predetermined value, and maintains the eyeglass lens in a slanted state by being fixed by a friction in a condition when the lens retaining members hold the eyeglass lens with the clamping force of over the predetermined value. 
   Also, one of the pair of lens rotating shafts can be provided rotatably and incapable of moving in an axis direction, and the other of the pair of lens rotating shafts can be provided rotatably and capable of moving in the axis direction, and aforementioned the other of the lens rotating shafts can be provided capable of moving and controlled in the axis direction by a shaft advancing and retracting drive device. Furthermore, the arithmetic control circuit is provided to control aforementioned the other of the lens rotating shafts so as to be advanced and retracted in the axis direction by controlling the shaft advancing and retracting drive device in motion, so that the apparatus can be provided capable of adjusting the clamping force by the lens retaining members to the eyeglass lens. 
   Moreover, the apparatus main body can be provided with a lens shape measuring device for measuring a lens thickness which is along a lens shape of the eyeglass lens based on the lens shape information (θi, ρi), and the arithmetic control circuit can slant the eyeglass lens held between the lens retaining members by controlling the lens shape measuring device in motion. 
   Also, the arithmetic control circuit can carry out a control so that the hole for fixing the point frame is drilled into the slanted eyeglass lens by the drilling device by calculating an angle of gradient of a refractive surface of the eyeglass lens from a result of measurement by the lens shape measuring device, and slanting the eyeglass lens to the lens rotating shafts by using the lens shape measuring device so as to set a drilling part of the refractive surface of the eyeglass lens to be in a certain angel to the drilling device based on the angle of gradient. 
   Also, after slanting the eyeglass lens to the lens rotating shafts by using the lens shape measuring device with the condition of holding the eyeglass lens between the lens retaining members with the clamping force in the setting range smaller than the predetermined value by controlling the shaft advancing and retracting drive device in motion, the arithmetic control circuit can carry out the control so that the hole for fixing the point frame is drilled into the slanted eyeglass lens by the drilling device by holding the eyeglass lens between the lens retaining members with the clamping force of over the predetermined value by controlling the shaft advancing and retracting drive device in motion. 
   Also, the drilling device can be provided with an arm retained by the apparatus main body capable of approaching and separating to the lens rotating shafts, an arm driving device for driving the arm to be approached and separated to the lens rotating shafts, a drilling tool which extends in a same direction or in substantially a same direction to extending directions of the lens rotating shafts and is retained by the arm capable of rotating and driving, a tool rotating driving device for rotating and driving the drilling tool, and a relative moving device for relatively approaching and separating the drilling tool and the eyeglass lens retained between the lens retaining members. 
   Also, the relative moving device can be as a tool retaining device which retains the drilling tool to the arm capable of advancing and retracting in an axis direction. 
   Also, the relative moving device can be provided with a carriage which the pair of lens rotating shafts are fixed and is capable of moving and driving in the extending directions of the lens rotating shafts, and an axis direction driving device which moves and drives the carriage in the extending directions of the lens rotating shafts. 
   Also, the carriage may be provided capable of elevating and lowering by the shaft-to-shaft distance variable device. 
   Furthermore, such structure can be employed that a chamfering stone or a grooving cutter is retained rotatably by the arm, and the chamfering stone or the grooving cutter is provided capable of rotating and driving by the tool rotating driving device. 

   
     BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS 
       FIG. 1  is an explanatory view showing a relation between a lens grinding processing apparatus according to the present invention and a frame shape measuring device. 
       FIG. 2A  is an explanatory view of an operation panel located at a lower side of the lens grinding processing apparatus and  FIG. 2B  is an explanatory view showing an operation panel located at an upper side of the lens grinding processing apparatus and is also showing an example of a representation of a liquid crystal display device. 
       FIG. 3A  is an explanatory view of a processing chamber of the lens grinding processing apparatus shown in  FIG. 1  and  FIG. 3B  is a cross-sectional view showing a relation between a lens rotating shaft and a side wall of the processing chamber. 
       FIG. 4  is a perspective view showing a condition that the processing chamber shown in  FIG. 3A  is arranged on a base. 
       FIG. 5  is a perspective view to explain a carriage which sustains the lens rotating shaft shown in  FIG. 4  and the base. 
       FIG. 6  is an explanatory view of means which controls elevation and lowering of the carriage shown in  FIG. 4 . 
       FIG. 7  is a cross-sectional view showing auxiliary lens peripheral edge processing means shown in  FIGS. 3A and 4  taken along a rotation shaft of a chamfering stone. 
       FIG. 8  is a horizontal cross-sectional view showing the auxiliary lens peripheral edge processing means shown in  FIGS. 3A and 4  including the rotating shaft of the chamfering stone and an axis of a drill which is for drilling a hole. 
       FIG. 9  is a cross-sectional view taken along A 1 —A 1  line in  FIG. 7 . 
       FIG. 10  is a partial-arrangement explanatory view showing a relation between the auxiliary lens peripheral edge processing means shown in  FIGS. 3A and 4  and a measuring element. 
       FIG. 11  is an explanatory perspective view showing a condition that a lid body of a swing arm in  FIG. 7  and a processing device are removed. 
       FIG. 12  is an explanatory view of other structure of the carriage shown in  FIG. 5 . 
       FIG. 13A  is a cross-sectional view of a part which retains an eyeglass lens to the lens rotating shaft, and  FIG. 13B  is an explanatory view of a fixing shaft section in  FIG. 13A  and a structure of restricting a rotation of the lens rotating shaft seen from inside of the lens rotating shaft. 
       FIG. 14  is a cross-sectional view taken along A 2 —A 2  line in  FIG. 13A . 
       FIG. 15  is a general explanatory view of an adjustable joint of a lens absorption device  300  in  FIG. 14  seen from right side. 
       FIG. 16  is a general explanatory view of a measuring section which interlocks with the measuring element in  FIGS. 3A and 4 . 
       FIG. 17  is a view of a control circuit of the lens grinding processing apparatus shown in  FIGS. 1–16 . 
       FIG. 18A  is a view showing a circular eyeglass lens which is before processing;  FIG. 18B  is an explanatory view for grinding the eyeglass lens in  FIG. 18A ;  FIG. 18C  is an explanatory view of the eyeglass lens which a grinding part in  FIG. 18B  is grinded;  FIG. 18D  is an explanatory view of positions which fixing holes for fixing a point frame are to be drilled into the eyeglass lens in  FIG. 18C ; FIG.  18 A′ is an explanatory view showing that the fixing hole for fixing the point frame is drilled into a circular eyeglass lens which is before processing; FIG.  18 B′ is an explanatory view for grinding the eyeglass lens in FIG.  18 A′ and FIG.  18 C′ is an explanatory view of the eyeglass lens which a grinding part in FIG.  18 B′ is grinded. 
       FIG. 19  is an explanatory view of a drilling process by the lens grinding processing apparatus in  FIGS. 1–17 . 
       FIG. 20  is an explanatory view for slanting and adjusting the eyeglass lens before carrying out the drilling process by the lens grinding processing apparatus in  FIGS. 1–17 . 
       FIG. 21  is an explanatory view showing a position of the drilling process of the eyeglass lens for carrying out the slanting and adjusting in  FIG. 20 . 
       FIG. 22  is an explanatory view for obtaining a data for carrying out the slanting and adjusting of the eyeglass lens in  FIG. 20 . 
       FIGS. 23A ,  23 B and  23 C are views of the point frames fixed to the eyeglasses lenses;  FIG. 23A  being an explanatory view of the point frame fixed to the eyeglass lens that is in a front attachment fixed type fixed to a front side-refractive surface of the eyeglass lens;  FIG. 23B  being an explanatory view of the point frame fixed to the eyeglass lens that is in a rear attachment fixed type fixed to a rear side-refractive surface of the eyeglass lens; and  FIG. 24C  being an explanatory view of the point frame fixed to the eyeglass lens that is in a combined attachment fixed type fixed to the front side and the rear side of the refractive surface of the eyeglass lens. 
       FIG. 24  is an operational explanatory view for fixing the eyeglass lens to the lens rotating shaft. 
       FIG. 25  is an operational explanatory view showing at the time when the eyeglass lens is clamped to the lens rotating shaft. 
       FIG. 26  is an operational explanatory view for measuring the eyeglass lens. 
       FIG. 27  is an operational explanatory view for measuring the eyeglass lens. 
       FIG. 28  is an operational explanatory view for grinding the eyeglass lens. 
       FIG. 29  is an operational explanatory view for a provisional clamping of the eyeglass lens. 
       FIG. 30  is an operational explanatory view for slanting and adjusting the eyeglass lens. 
       FIG. 31  is an operational explanatory view for measuring the eyeglass lens after the slanting and adjusting of the eyeglass lens are carried out. 
       FIG. 32A  is an explanatory view showing a condition of the eyeglass lens after the slanting and adjusting are carried out, and  FIG. 32B  is a right side surface view of  FIG. 32A . 
       FIG. 33  is an operational explanatory view for the drilling process of the eyeglass lens. 
       FIG. 34  is an operational explanatory view for the drilling process of the eyeglass lens. 
       FIG. 35A  is an explanatory view showing a condition after the drilling process of the eyeglass lens is carried out, and  FIG. 35B  is a right side surface view of  FIG. 35A . 
       FIGS. 36A and 36B  are operational explanatory views showing other examples for carrying out the slanting and adjusting of the eyeglass lens, and  FIG. 36C  is a right side surface view of  FIG. 36A . 
       FIG. 37  is an operational explanatory view showing other example for the drilling process of the eyeglass lens. 
       FIG. 38A  is an explanatory view showing other example of a condition of the eyeglass lens after the drilling process is carried out, and  FIG. 38B  is a right side surface view of  FIG. 38A . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 
   [Constitution] 
   In  FIG. 1 , reference numeral  1  denotes a frame shape measuring device (lens shape data measuring device) which reads out lens shape information (θi, ρi) as a lens shape data and a data on position of a hole for fixing a point frame from a lens frame shape of an eyeglass frame F, a template thereof, or a lens model or the like. Reference numeral  2  denotes a lens grinding processing apparatus (lens grinder) which grinds and processes a natural lens or the like to make an eyeglass lens ML (including a rimless lens) based on the lens shape data of the eyeglass frame inputted by a transmission or the like from the frame shape measuring device. By the way, since a publicly known frame shape measuring device can be used as the frame shape measuring device  1 , explanation of its detailed structure or a method for measuring data or the like will be omitted. 
   Also, the data on position of the hole for fixing the point frame can be obtained with a measuring method of either a non-contact type or a contact type by an area sensor or a member for measuring the position of the fixing hole (aperture) or the like described in Japanese Patent Laid Open No. H8-15594 or No. 2001-166269. 
   The measured data on position of the hole for fixing the point frame is, as described later, stored in a data memory  82  with the lens shape information (θi, ρi) of the lens shape data of the lens model (lens for a demonstration which the hole for fixing the point frame is provided). 
   &lt;Lens Grinding Processing Apparatus  2 &gt; 
   The lens grinding processing apparatus  2  has an apparatus main body (main body case)  3 . At an upper part of the apparatus main body  3 , as shown in  FIG. 1 , an upper surface (inclining surface)  3   a  is provided which inclines to an upper side as going from a near side to a back side, and a processing chamber  4  is formed which opens at a front part side (lower part side) of the upper surface  3   a.    
   The processing chamber  4  is provided to be opened and closed by a cover  5  fixed to the apparatus main body  3  capable of sliding and controlling upwardly and downwardly on a slant. The cover  5  is composed of one colorless transparent or colored transparent (for example, gray colored transparent or the like) panel made of a glass or a resin and is slid forward and backward in the apparatus main body  3 . 
   In addition, at the upper surface  3   a  of the apparatus main body  3 , an operation panel  6  which is located at a side part of the processing chamber  4  and an operation panel  7  which is in U-shape located at a back part side from an upper part opening of the processing chamber  4  are provided. Also, at the upper surface  3   a , a liquid crystal display device (display device)  8  is provided as displaying means for displaying operational conditions of the operation panel  6  and the operation panel  7  located at a back part from a lower part side of the operation panel  7  which is in L-shape. 
   (Operation Panel  6 ) 
   As shown in  FIG. 2A , the operation panel  6  is provided with a “clamp” switch  6   a  for clamping the eyeglass lens with a pair of lens rotating shafts (lens retaining shaft)  23  and  24  which are described later; a “left” switch  6   b  and a “right” switch  6   c  for specifying the processing of the eyeglass lens for a right eye or a left eye or for carrying out a switching over of a displaying thereof; “move grinding stone” switches  6   d  and  6   e  for moving the grinding stone in right and left directions; a “refinish/test” switch  6   f  for refinishing in a case that a finishing process of the eyeglass lens is insufficient or a tentative grinding in a case that the grinding is tentatively carried out; a “rotate lens” switch  6   g  for a lens rotating mode; and a “stop” switch  6   h  for a stop mode. This is for reducing a burden of work of an operator by arranging such switches necessary for the actual lens processing near the processing chamber  4 . 
   (Operation Panel  7 ) 
   The operation panel  7  has, as shown in  FIG. 2B , a “screen” switch  7   a  for switching over a displaying condition of the liquid crystal display device  8 ; a “memory” switch  7   b  for memorizing settings or the like relating to the processing displayed on the liquid crystal display device  8 ; a “data request” switch  7   c  for loading the lens shape information (θi, ρi); a seesaw type “−+” switch  7   d  which is used in a numerical correction or the like (“−” and “+” switches may be provided separately); and a “∇” switch  7   e  which is used for a cursor pointer, which are arranged at a side part of the liquid crystal display device  8 . In addition, function keys F 1  to F 6  are arranged at a lower part of the liquid crystal display device  8 . 
   The function keys F 1  to F 6  are used when carrying out the setting regarding the process of the eyeglass lens ML, as well as are used in a response or a selection for a message displayed on the liquid crystal display device  8  during the grinding process. 
   As for the function keys F 1  to F 6 , in the setting with regard to the processing (layout screen), the function key F 1  is used for inputting a kind of lens; the function key F 2  for inputting a processing course; the function key F 3  for inputting a lens material; the function key F 4  for inputting a kind of frame; the function key F 5  for inputting a kind of chamfering process; and the function key F 6  for inputting a mirror finishing process. 
   For the kinds of lens inputted by the function key F 1 , there are “mono-focal”, “ophthalmic prescription”, “progressive”, “bi-focal”, “cataract” and “tsubokuri” or the like. By the way, the “cataract” generally means a plus lens having a high diopter, and the “taubokuri” means a minus lens having a high diopter in the eyeglass world. 
   As the processing course inputted by the function key F 2 , there are “auto”, “test”, “monitor”, and “frame change” or the like. 
   As the materials of the lens to be processed which are inputted by the function key F 3 , there are “plastic”, “high index”, “glass”, “polycarbonate” and “acrylic” or the like. 
   As the kinds of eyeglass frame F inputted by the function key F 4 , there are “metal”, “cell”, “optyl”, “flat”, “grooving (thin)”, “grooving (middle)”, “grooving (thick)”, “point: front attachment”, “point: rear attachment” and “point: combined attachment” or the like. 
   By the way, each “grooving” indicates a V-groove that is a kind of the V-groove processing. Also, when the “point: front attachment” is inputted, a drilling process is applied to the eyeglass lens from a front side of a refractive surface side, and when the “point: rear attachment” is inputted, the drilling process is applied to the eyeglass lens from a rear side of the refractive surface side. In addition, when it is the “point: combined attachment”, the drilling process is applied to the eyeglass lens from the front side of the refractive surface side to one part of a nose pad side and an end piece side, and the drilling process is also applied to the eyeglass lens from the rear side of the refractive surface side to the other part of the nose pad side and the end piece side so as to fix the point frame at the nose pad side and the end piece side of the eyeglass lens. As just described, direction that the drilling process is applied to the eyeglass lens varies depending on the kinds of point frame. 
   The “front attachment” stands for a point frame Pf 1  which is in a front attachment fixed type fixed to a front side refractive surface rf of the eyeglass lens ML as shown in  FIG. 23A , and the “rear attachment” stands for a point frame Pf 2  which is in a rear attachment fixed type fixed to a rear side refractive surface rb of the eyeglass lens as shown in  FIG. 23B . The point frames Pf 1  and Pf 2  have a bridge attachment Ba fixed to the nose pad side of the eyeglass lens ML and an attachment of the end piece side E for rotatably fixing a temple (not shown) of the end piece side. 
   In addition, for the “combined attachment”, there are “a case that the point frame Pf 1  which is in the rear attachment fixed type is fixed to the nose pad side and the point frame Pf 2  which is in the front attachment fixed type is fixed to the end piece side” as shown in  FIG. 23C , and “a case that the point frame which is in the front attachment fixed type is fixed to the nose pad side and the point frame which is in the rear attachment fixed type is fixed to the end piece side” as contrary to  FIG. 23C . 
   As the kinds of chamfering process inputted by the function key F 5 , there are “none”, “small”, “middle”, “large” and “special” or the like. 
   As the kinds of mirror finishing process inputted by the function key F 6 , there are “non-perform”, “perform” and “mirror finishing of chamfer part” or the like. 
   Note that modes, types and an order of the above-described function keys F 1  to F 6  are not particularly limited. Moreover, for selection of tabs TB 1  to TB 4  which are described later, function keys for selecting “layout”, “in processing”, “after processing”, “menu” and the like may be further provided, and the number of keys is not limited. 
   (Liquid Crystal Display Device  8 ) 
   In the liquid crystal display device  8 , the display device is changed over by a “layout” tab TB 1 , an “in processing” tab TB 2 , an “after processing” tab TB 3  and a “menu” tab TB 4 . The liquid crystal display device  8  has function display sections H 1  to H 6  which correspond to the function keys F 1  to F 6  at a lower part thereof. By the way, colors of the tabs TB 1  to TB 2  are independent from each other. In changing over the selection of the tabs TB 1  to TB 2 , the color of the background of the display screen other than areas E 1  to E 4 , which will be described later, is simultaneously changed to the same color as that of the selected tab. 
   For example, the “layout” tab TB 1  and the entire display screen (background) attached with the tab TB 1  are displayed in blue; the “in processing” tab TB 2  and the entire display screen (background) attached with the tab TB 2  in green; the “after processing” tab TB 3  and the entire display screen (background) attached with the tab TB 3  in red; and the “menu” tab TB 4  and the entire display screen (background) attached with the tab TB 4  in yellow. 
   In such a manner, since each of the tabs TB 1  to TB 4 , which are classified for each operation depending on color, and the background of the display screen are displayed in the same color, the operator can easily recognize or confirm the current operation that is being performed. 
   In the function display sections H 1  to H 6 , necessary objects are displayed accordingly. In a non-display state, images, numerical values, conditions or the like different from displays corresponding to the functions of the function keys F 1  to F 6  can be displayed. In addition, when each of the function keys F 1  to F 6  is being operated, display such as a mode display may be changed over for each click of the function key F 1 , for example, during the operation of the function key F 1 . For example, a list of modes corresponding to the function key F 1  may be displayed (pop-up display) whereby the selecting operability can be improved. The list in the pop-up display may be shown with characters, diagrams, icons or the like. 
   While the “layout” tab TB 1 , the “in processing” tab TB 2  or the “after processing” tab TB 3  are being selected, the display screen is displayed to be sectioned into an icon display area E 1 , a message display area E 2 , a numerical value display area E 3  and a state display area E 4 . While the “menu” tab TB 4  is being selected, the display screen is displayed as one menu display area as a whole. By the way, while the “layout” tab TB 1  is being selected, the “in processing” tab TB 2  and the tab TB 3  are not displayed, and the tab TB 2  and the tab Tb 3  may be displayed at the time when the layout setting is completed. 
   Since the layout setting by use of the above described liquid crystal display device  8  is similar to that in Japanese Patent Application Nos. 2000-287040 or 2000-290864, a detailed description will be omitted. 
   &lt;Grinding Processing Section  10 &gt; 
   As shown in  FIGS. 3A and 4 , a grinding processing section  10  which has the processing chamber  4  as mentioned above is provided in the apparatus main body  3 . The processing chamber  4  is formed within a peripheral wall  11  which is fixed in the grinding processing section  10 . 
   The peripheral wall  11  has left and right side walls  11   a  and  11   b , a rear wall  11   c , a front wall  11   d  and a bottom wall  11   e  as shown in  FIGS. 3A and 4 . In addition, on the side walls  11   a  and  11   b , arc-shaped guide slits  11   a   1  and  11   b   1  are formed respectively (see  FIG. 3A ). In addition, as shown in  FIG. 3A , the bottom wall  11   e  has an arc-shaped bottom wall (slanted bottom wall)  11   e   1  extending downward in an arc shape from the rear wall  11   c  to a near side, and a lower bottom wall (not shown) extending from a front lower end of the arc-shaped bottom wall  11   e   1  to the front wall  11   d . The lower bottom wall is provided with a drain pipe (not shown) in the vicinity of the arc-shaped bottom wall  11   e   1  and the drain pipe extends to a waste water tank (not shown) at a lower part. 
   As shown in  FIGS. 4 and 5 , the grinding processing section  10  has a tray  12  fixed to the apparatus main body  3  and a base  13  disposed on the tray  12 . Also, the grinding processing section  10  has a base drive motor  14  fixed to the tray  12 , a support section  12   a  which is raised from the tray  12 , and a screw shaft (feed screw)  15  which is interlocked with an output shaft (not shown) of the base drive motor  14  and which has a tip rotatably retained by the support section  12   a . In addition, a pulse motor is used for the base drive motor  14 . 
   The grinding processing section  10  further comprises a rotation drive system  16  for the eyeglass lens ML, grinding means  17  for the eyeglass lens ML and a lens thickness measuring system (lens thickness measuring means)  18  for the eyeglass lens ML. 
   (Base  13 ) 
   The base  13  is, as shown in  FIG. 5 , formed by a rear support section  18   a  extending along a rear edge of the tray  12  in transverse direction and a side support section  13   b  extending from a left end of the rear support section  13   a  to the front side so as to be formed in substantially V-shape. Shaft support sections  13   c  and  13   d , which are in V-shaped blocks, are respectively fixed on right and left end parts of the rear support section  13   a , and a shaft support section  13   e , which is in a V-shaped block, is fixed on the side support section  13   b.    
   Also, in the apparatus main body  3 , a pair of parallel guide bars  19  and  20  extending in transverse direction are disposed in parallel on the front and rear sides. 
   The left and right ends of the parallel guide bars  19  and  20  are attached to the left and right parts in the apparatus main body  3 . Furthermore, the side support section  13   b  of the base  13  is pivotally supported by the parallel guide bars  19  and  20  so as to advance and retract right and left in an axis direction of the guide bars  19  and  20 . 
   Moreover, a guide section  13   f  is integrally formed on the base  13 . A screw shaft (feed screw)  15  is screwed in the guide section  13   f . The base drive motor  14  is operated to drive the screw shaft  15  rotatively, whereby the guide section  13   f  is advanced and retracted in the axis direction of the screw shaft  15 , and then the base  13  is moved along with the guide section  13   f  integrally. At this time, the base  13  is guided by the pair of the parallel guide bars  19  and  20  to displace along the axes thereof. 
   (Carriage) 
   Also, both ends of a carriage swing shaft  21  extending in a transverse direction are disposed on V-grooves on the shaft support sections  13   c  and  13   d . Referential numeral  22  denotes a carriage attached to the carriage swing shaft  21 . The carriage  22  is composed of arm sections  22   a  and  22   b  for attachment of shafts, a connecting section  22   c  and a support projecting section  22   d  to be formed in a bifurcate shape. The arm sections  22   a  and  22   b  are positioned on the left and right sides with an interval therebetween and extended forward and rearward. The connecting section  22   c  is extended in a transverse direction and connects the rear ends of the arm sections  22   a  and  22   b . The support projecting section  22   d  is provided in a center of the connecting section  22   c  in a transverse direction to project rearward. The arm sections  22   a  and  22   b  and the connecting section  22   c  form a horseshoe. The peripheral wall  11  forming the processing chamber  4  is disposed between the arm sections  22   a  and  22   b.    
   The carriage swing shaft  21  penetrates the support projecting section  22   d  and is held by the support projecting section  22   d , while the carriage swing shaft  21  freely rotates with respect to the shaft support sections  13   c  and  13   d . Accordingly, a front end part of the carriage  22  can swing around the carriage swing shaft  21  up and down. By the way, the carriage swing shaft  21  may be fixed to the shaft support sections  13   c  and  13   d , and the support projecting section  22   d  may be held by the carriage swing shaft  21  so as to swing with respect to the carriage swing shaft  21  and so as not to move in the axis direction thereof. 
   (Lens Rotating Shafts  23  and  24 ) 
   The carriage  22  is provided with a pair of the lens rotating shafts (lens shafts)  23  and  24  which extend in a transverse direction and clamp the eyeglass lens (unprocessed circular eyeglass lens, that is, circular lens to be processed) ML on the same axis. 
   The lens rotating shaft  23  penetrates the tip of the arm section  22   a  in a transverse direction, and is held thereon so as to rotate around the axis and so as not to move in the axis direction. The lens rotating shaft  24  is held by the tip of the arm section  22   b  in a transverse direction so as to rotate around the axis and adjust the movement in the axis direction. The lens rotating shaft  24  is advanced and retracted in an axis direction actuated by a feed screw mechanism SM described hereinunder as shown in  FIG. 12 . 
   At an end part and an opposite side to the lens rotating shaft  23  of the lens rotating shaft  24 , a circular member  24 H of the feed screw mechanism SM is integrally formed as shown in  FIG. 12 . The circular member  24 H is retained at a head part  24   b  of a feed screw  24   a  rotatably around an axis and incapable of moving in an axis direction. Accordingly, the lens rotating shaft  24  is retained rotatably relative to the feed screw  24   a  and incapable of moving in the axis direction. 
   The head part  24   b  is restricted to rotate around the axis of the lens rotating shaft  24  and the feed screw  24   a  by a key  24   b   1  and a key groove  24   b   2 . In addition, the feed screw  24   a  is screwed In a female screw tube  24   c . The female screw tube  24   c  is fixed to an output shaft  24   d   1  of a pulse motor (drive motor)  24   d . When the female screw tube  24   c  is normally rotated by normally rotating the pulse motor  24   d , the feed screw  24   a  is moved to a left part in  FIG. 12 , and when the female screw tube  24   c  is reversed by reversely rotating the pulse motor  24   d , the feed screw  24   a  is moved to a right part in  FIG. 12 . In addition, a spline section  24   e  is formed at the lens rotating shaft  24 . The pulse motor  24   d  and the feed screw  24   a  or the like are retained by a cover CA which covers the carriage  22 . 
   As described above, the lens rotating shaft  24  is adjustably moved in the axis direction by the feed screw mechanism SM structured as shown by reference numerals  24   a  to  24 H. 
   (Rotation Drive System  16  for Lens Rotating Shafts  23  and  24 ) 
   The rotation drive system  16  for the lens rotating shafts  23  and  24  has, as shown in  FIG. 5  and  FIG. 12 , a lens rotating shaft drive motor  25  fixed to the carriage  22  by fixing means which is not shown, a power transmission shaft (drive shaft)  25   a  which is rotatably retained by the carriage  22  and is interlocked with an output shaft of the lens rotating shaft drive motor  25 , a drive gear  26  which is provided at a tip of the power transmission shaft  25   a  and a driven gear  26   a  geared with the drive gear  26  and attached to one lens rotating shaft  23 . In this case, a worm gear is used for the drive gear  26 , and a worm wheel is used for the driven gear  26   a.    
   The rotation drive system  16  further comprises a pulley  27  fixed to an outer end part (opposite end part to the lens rotating shaft  24 ) of one lens rotating shaft  23 ; a power transmission mechanism  28  provided at the carriage  22  and a pulley  29  rotatably retained on an outer end part (opposite end part to the lens rotating shaft  23 ) of the other lens rotating shaft  24 . 
   The pulley  29  is, as shown in  FIG. 12 , spline-fitted to the spline section  24   e  of the lens rotating shaft  24  and is provided incapable of moving in extending direction of the axis of the lens rotating shaft  24  by movement restricting means which is not shown. Accordingly, the pulley  29  is provided capable of moving relative in the axis direction to the lens rotating shaft  24  and is set so as a position in the axis direction is not changed when the lens rotating shaft  24  is adjusted to move in the axis direction. 
   The power transmission mechanism  28  has transmission pulleys  28   a  and  28   b , and a transmission shaft (power transmission shaft)  28   c  which has the transmission pulleys  28   a  and  28   b  fixed on both ends thereof. The transmission shaft  28   c  is disposed parallel to the lens rotating shafts  23  and  24  and rotatably retained by the carriage  22  with a bearing which is not shown. Also, the power transmission mechanism  28  further comprises a driving side belt  28   d  bridged between the pulley  27  and the transmission pulley  28   a , and a driven side belt  28   e  bridged between the pulley  29  and the transmission pulley  28   b.    
   When the lens drive motor  25  is operated to rotate the power transmission shaft  25   a , the rotation of the power transmission shaft  25   a  is transmitted through the drive gear  26  and the driven gear  26   a  to the lens rotating shaft  23 , so that the lens rotating shaft  23  and the pulley  27  are rotatively driven together. On the other hand, the rotation of the pulley  27  is transmitted through the drive side belt  28   d , the transmission pulley  28   a , the transmission shaft  28   c , the transmission pulley  28   b  and the driven side belt  28   e  to the pulley  29 , and then the pulley  29  and the lens rotating shaft  24  are rotatively driven integrally. At this time, the lens rotating shaft  24  and the lens rotating shaft  23  are integrally rotated in synchronization to each other. 
   (Lens Absorption Device  300  and Lens Retainer  320 ) 
   In addition, at an opposed end part of the lens rotating shafts  23  and  24 , fixing holes  23   m  and  24   m  are respectively formed, and a lens absorption device  300  and a lens retainer  320  are each fixed to the fixing holes  23   m  and  24   m  as shown in  FIGS. 13A  and  FIG. 14 . 
   Lens Absorption Device  300   
   The lens absorption device (lens holding section)  300  has, as shown in  FIGS. 13A  and  FIG. 14 , an adjustable joint (universal joint)  301  and a lens absorption board  302 . The adjustable joint (spheroid joint, that is, spheroid connection)  301  has, a fixing shaft section  303  which one end is fitted to the fixing hole  23   m  of end part of the lens rotating shaft  23 , a first hemispheric member  304  which is slippery and rotatably engaged with a hemispheric hole  303   a  provided at the other end of the fixing shaft section  303 , and a second hemispheric member  305  which is slippery and rotatably engaged with a hemispheric hole  304   a  of the first hemispheric member  304 . 
   In addition, a key groove  303   b  which extends radially is formed at the hemispheric hole  303   a , and a key groove  304   b  which extends radially and in perpendicular to the key groove  303   b  is formed at the hemispheric hole  304   a . Moreover, a key  304   c  which is provided in protruding condition to an outer surface of the hemispheric member  304  is engaged to the key groove  303   b , and a key  305   a  which is provided in protruding condition to an outer surface of the hemispheric member  305  is engaged to the key groove  304   b . Meanwhile, the hemispheric member  305  has a hole section  305   c  which is continuously provided to a hemispheric hole  305   b  and a hemispheric hole  305   b.    
   By such a structure, rotation of the first hemispheric member  304  in extending direction of the key groove  303   b  is permitted, and the rotation other than the extending direction of the key groove  303   b  is restricted. Similarly, rotation of the second hemispheric member  305  in extending direction of the key groove  304   b  is permitted, and the rotation other than the extending direction of the key groove  304   b  is restricted. 
   At center of the first hemispheric member  304  and the second hemispheric member  305 , penetrated holes  304   d  and  305   d  are respectively formed. Also, inside of the fixing shaft section  303 , a fixing pin  306  which is penetrated center of the hemispheric hole  303   a  and the penetrated holes  304   d  and  305   d  and protruded into center of the hemispheric member  305  is provided. Reference numeral  306   a  denotes a head section of the fixing pin  306 . To the fixing pin  306 , a hemispheric pulled out restricting member  307  which an outer surface is slippery and rotatably engaged with the hemispheric hole  305   b  is fixed by a screw which is not shown. By this structure, the hemispheric members  304  and  305  are retained without gap between the hemispheric hole  303   a  and the hemispheric outer surface of the pulled out restricting member  307  and are retained rotatably in arbitrary direction through the head section  306   a  and the pulled out restricting member  307 , and are set so as not to be removed from the fixing shaft section  303 . Accordingly, between the hemispheric hole  303   a  and the hemispheric member  304 , and between the hemispheric member  304  and the hemispheric member  305  are mutually engaged with certain degree of friction, and the hemispheric members  304  and  305  are rotated in the above mentioned extending directions of the key grooves  303   b  and the  304   b  when force exceeding a predetermined level is acted. 
   By the way, as shown in  FIGS. 13A and 13B , a groove  303   e  is formed at an end surface of the fixing shaft section  303 , and in the fixing hole  23   m  which is inside of the lens rotating shaft  23 , a convex section  23   b  engaged with the groove  303   e  is formed. The groove  303   e  and the convex section  23   b  are positioning the fixing shaft section  303  and the lens rotating shaft  23  in circumferential direction. 
   Furthermore, the lens absorption board  302  has a shaft portion  302   a  which is made of metal fitted to the hole section  305   c  of the hemispheric member  305 , and an absorption cup  302   b  which is made of rubber connected to the shaft portion  302   a . A rotation restricting pin  302   c  is protrudedly provided at a circumferential surface of the shaft portion  302   a , and a rotation restricting groove  305   e  is formed at the hole section  305   e . In addition, the rotation restricting pin  302   c  is engaged to the rotation restriction groove  305   e  so that a relative rotation of the shaft portion  302   a  and the hemispheric member  305  are restricted. Meanwhile, one end of the rotation restricting groove  305   e  is opened to an end surface of the hemispheric member  305 . 
   Lens Retainer  320   
   The lens retainer  320  (lens holding section)  320  has, as shown in  FIG. 13A  and  FIG. 14 , an adjustable joint  321  (universal joint) and a lens retain member  322 . The adjustable joint (spheroid joint, that is, spheroid connection)  321  has, a fixing shaft section  323  which one end is fitted to the fixing hole  24   m  of an end part of the lens rotating shaft  24 , and a hemispheric member  324  which is slippery and rotatably engaged with a hemispheric hole  323   a  provided at the other end of the fixing shaft section  323 . At center of the hemispheric member  324 , a penetrated hole  324   a  is formed. Also, inside of the lens fixing shaft  24 , a fixing pin  325  which is penetrated center of the hemispheric hole  323   a  and protruded into center of the hemispheric member  324  is provided. Reference numeral  325   a  denotes a head section of the fixing pin  325 . 
   To the fixing pin  325 , a hemispheric pulled out restricting member  326  which an outer surface is slippery and rotatably engaged with the hemispheric hole  324   a  is fixed by a screw which is not shown. By this structure, the hemispheric member  324  is retained without gap between the hemispheric hole  323   a  and the pulled out restricting member  326  and is retained rotatably in arbitrary direction through the head section  325   a  and the pulled out restricting member  326 , and is set so as not to be removed from the fixing shaft section  323 . 
   Accordingly, the hemispheric hole  323   a  and the hemispheric member  324  are mutually engaged with certain degree of friction, and the hemispheric member  324  is provided capable of rotating when force exceeding a predetermined amount is acted. By the way, it is recommended that the hemispheric member  304  and the hemispheric member  324  are provided as one part of an identical spherical member as shown in  FIGS. 24 to 26 . In addition, although the hemispheric member  305  is protruded from the hemispheric member  304  by the above mentioned way, it can be disposed inside of the hemispheric member  304  so that it is not protruded from the hemispheric member  304 . Although the hemispheric member  305  is not shown in  FIGS. 24 to 26 , they are showing examples of the hemispheric member  305  being disposed inside of the hemispheric member  304  so as not to be protruded from the hemispheric member  304 . 
   (Arrangement of Lens Rotating Shafts  23  and  24  in Processing Chamber  4 ) 
   The guide slits  11   a   1  and  11   b   1  of the above described peripheral wall  11  are formed in arc shapes around the carriage swing shaft  21 . The opposed end sections to each other of the lens rotating shafts  23  and  24 , which are held by the carriage  22 , are inserted into the guide slits  11   a   1  and  11   b   1 . Accordingly, the opposed end sections of the lens rotating shafts  23  and  24  are projected into the processing chamber  4  surrounded by the peripheral wall  11 . 
   As shown in  FIG. 3A , an arc-shaped guide plate P 1  having a hat-shaped section is attached on the inner wall surface of the side wall  11   a , and as shown in  FIG. 4 , an arc-shaped guide plate P 2  having a hat-shaped section is attached on the inner wall surface of the side wall  11   b  (see  FIG. 3B ). In the guide plates P 1  and P 2 , guide slits  11   a   2 ′ and  11   b   2 ′ extending in an arc shape are formed so as to correspond to the guide slits  11   a   1  and  11   b   1  respectively. 
   In addition, a cover plate  11   a   2  for closing the guide slits  11   a   1  and  11   a   2 ′ is disposed between the side wall  11   a  and the guide plate P 1  so as to move forward and rearward and up and down, and a cover plate  11   b   2  for closing the guide slits  11   b   1  and  11   b   2 ′ is disposed between the side wall  11   b  and the guide plate P 2  so as to move forward and rearward and up and down. Also, the lens rotating shafts  23  and  24  slidably penetrate the cover plates  11   a   2  and  11   b   2  respectively. Accordingly, the cover plates  11   a   2  and  11   b   2  are attached to the lens rotating shafts  23  and  24  so as to move relatively in the axis direction respectively. 
   Moreover, in the guide plate P 1 , arc shaped guide rails Ga and Gb are provided, which are positioned above and below the guide slits  11   a   1  and  11   a   2 ′ along the upper and lower edges of the guide slits  11   a   1  and  11   a   2 ′, and the guide plate P 2  is provided with arc-shaped guide rails Gc and Gd respectively positioning above and below the guide slits  11   b   1  and  11   b   2 ′ to follow the upper and lower edges of the guide slits  11   b   1  and  11   b   2 ′. 
   The cover plate  11   a   2  can be guided in the guide rails Ga and Gb at the upper and lower edges thereof to move up and down while drawing an arc, and the cover plate  11   b   2  can be guided in the guide rails Gc and Gd at the upper and lower edges thereof to move up and down while drawing an arc. 
   Additionally, the lens rotating shaft  23  of the carriage  22  slidably penetrates the arc-shaped cover plate  11   a   2  so as to facilitate assemblies of the lens rotating shaft  23 , the side wall  11   a , the guide plate P 1  and the cover plate  11   a   2 . The lens rotating shaft  24  of the carriage  22  slidably penetrates the arc-shaped cover plate  11   b   2  so as to facilitate assemblies of the lens rotating shaft  24 , the side wall  11   b , the guide plate P 2  and the cover plate  11   b   2 . 
   Also, a space between the cover plate  11   a   2  and the lens rotating shaft  23  is sealed by seal members Sa and Sa, and the cover plate  11   a   2  is held by the lens rotating shaft  23  through the seal members Sa and Sa. Moreover, a space between the cover plate  11   b   2  and the lens rotating shaft  24  is sealed by seal members Sb and Sb, and the cover plate  11   b   2  is held by the lens rotating shaft  24  through the seal members Sb and Sb so as to relatively move in the axis direction. Accordingly, when the lens rotating shafts  23  and  24  rotate along the guide slits  11   a   1  and  11   a   2 ′, and  11   b   1  and  11   b   2 ′ while drawing an are, the cover plates  11   a   2  and  11   b   2  can also move up and down together with the lens rotating shafts  23  and  24  integrally. By the way, the seal members Sa and Sa may be held by the cover plate  11   a   2 , or the circumferential parts thereof may be disposed between the cover plate  11   a   2  and the side wall  11   a , and between the cover plate  11   a   2  and the guide plate P 1  so that the seal members Sa and Sa cannot move in the axis direction of the lens rotating shaft  23  when the lens rotating shaft  23  moves in the axis direction. Similarly, the seal members Sb and Sb may be held by the cover plate  11   b   2 , or the circumferential parts thereof may be disposed between the cover plate  11   b   2  and the side wall  11   b , and between the cover plate  11   b   2  and the guide plate P 2  so that the seal members Sb and Sb cannot move in the axis direction of the lens rotating shaft  24  when the lens rotating shaft  24  moves in the axis direction. 
   The side wall  11   a  and the guide plate P 1  are close to the arc-shaped cover plate  11   a   2  so as to contact thereto tightly, and the side wall  11   b  and the guide plate P 2  are close to the arc-shaped cover plate  11   b   2  so as to contact thereto tightly. 
   Furthermore, each of the guide plates P 1  and P 2  in the processing chamber  4  is provided to extend to the vicinities of the rear wall lie and the lower bottom wall (not shown) and is designed to have the upper end cut on the side of a measuring element  41  and the lower end cut in the upper vicinity of a grinding stone  35 , whereby the upper and lower ends of the guide plates P 1  and P 2  are opened within the processing chamber  4 . Accordingly, grinding fluid is flown along the inner surfaces of the side walls  11   a  and  11   b , so that the grinding fluid does not stay between the side wall  11   a  and the guide plate P 1 , and between the side wall  11   b  and the guide plate P 2 . 
   In addition, when the carriage  22  is swung up and down around the carriage swing shaft  21  and the lens rotating shafts  23  and  24  are moved up and down along the guide slits  11   a   1  and  11   b   1 , the cover plates  11   a   2  and  11   b   2  are moved up and down together with the lens rotating shafts  23  and  24 . Accordingly, the guide slits  11   a   1  and  11   b   1  are always closed by the cover plates  11   a   2  and  11   b   2 , as a result, the grinding fluid or the like within the peripheral wall  11  does not leak to the outside of the peripheral wall  11 . By the way, the eyeglass lens ML is close to or apart from the grinding stone  35  with the upward and downward movement of the lens rotating shafts  23  and  24 . 
   At the time of loading of a natural lens or the like of the eyeglass lens ML to the lens rotating shafts  23  and  24 , and unloading thereof after the grinding process, the carriage  22  is positioned in the center of the swinging in the vertical direction such that the lens rotating shafts  23  and  24  are positioned in the middle of the guide slits  11   a   1  and  11   b   1  respectively. Also, at the time of measuring the lens thickness and the grinding process, the carriage  22  is controlled and swung upward and downward to be slant in accordance with a grinding processed amount of the eyeglass lens ML. 
   (Grinding Means  17 ) 
   The grinding means has main lens peripheral edge grinding means and auxiliary lens peripheral edge processing means. 
   Main Lens Peripheral Edge Grinding Means 
   The main lens peripheral edge grinding means has, as shown in  FIG. 4 , a grinding stone drive motor  30  fixed to the tray  12 ; a transmission shaft  32  to which drive of the grinding stone drive motor  30  is transmitted through a belt  31 ; a grinding stone shaft section  33  to which rotation of the transmission shaft  32  is transmitted, and the grinding stone  35  fixed to the grinding stone shaft section  33 . The grinding stone  35  includes a rough grinding stone, a grinding stone for a V-groove and a finishing grinding stone or the like, of which reference numerals are omitted. The rough grinding stone, the grinding stone for the V-groove and the finishing grinding stone are arranged side by side in the axis direction. 
   Auxiliary Lens Peripheral Processing Means 
   In addition, the auxiliary lens peripheral processing means has, as shown in  FIG. 3A  and  FIG. 4 , a drilling processing device  200  and an auxiliary processing device  201 . The drilling processing device (drilling means)  200  and the auxiliary processing device  201  have, as shown in  FIG. 7 , a processing device sustention mechanism  202  which is shared and processing device driving means  203  which is partially shared. 
   &lt;Processing Device Sustention Mechanism  202 &gt; 
   The processing device sustention mechanism  202  has, as shown in  FIG. 7 , a swing arm  204  (see  FIG. 8A  and  FIG. 4 ) fixed swingably to the side wall  11   a , and swing driving means (rotation driving means)  205  for swinging (upward and downward rotation) the swing arm  204 . 
   (Swing Arm  204 ) 
   The swing arm  204  is arranged in one side part of the processing chamber  4  of the lens grinding processing apparatus. Moreover, the swing arm  204  has an arm main body  206  as shown in  FIGS. 7 and 11 . The arm main body  206  has a space  206   a  which is opened to one surface. Also, at one end part (upper end part as a free end part) of the swing arm  204 , that is, at one end part (free end part) of the arm main body  206 , a hollow arm section  207  for fixing a drill protruded from an outer surface of a side wall  206   b  is provided as shown in  FIG. 9 , and inside of the arm section  207 , a space  207   a  which is opened in the same direction with the space  206   a  is formed. The spaces  206   a  and  207   a  are mutually communicated through a communicating passage  208 . 
   Also, as shown in  FIG. 7 , the swing arm  204  has a lid body  209  which is fixed attachably and detachably to an opening of the arm main body  206  and closes the space  206   a , and a lid body  210  which is fixed attachably and detachably to an opening of an arm portion  208  and closes the space  207   a . Furthermore, at one end part of the lid bodies  209  and  210 , bearing tube sections  211  and  212  are integrally provided. 
   At base (lower end part as other end part) of the arm main body  206 , one end of a rotation sustention tube (tube body)  213  is fixed. The rotation sustention tube (tube body)  213  is sustained by a sustention wall  216  which is inside of the apparatus main body  3  and the side wall  11   a  through bearings  214  and  215 . Reference numeral  215   a  denotes a bearing sustention tube body which is fixed to the side wall  11   a  and which is rotatably sustaining the bearing  215  to the side wall  11   a.    
   (Swing Driving Means  205 ) 
   As shown in  FIG. 7 , the swing driving means  205  has a drive motor  217  such as the pulse motor fixed to the sustention wall  216 , a gear (pinion)  218  fixed to an output shaft  217   a  of the drive motor  217 , and a gear  219  which gears with the gear  218  and is fixed to the rotation sustention tube  213 . Accordingly, rotation of the drive motor  217  is transmitted to the rotation sustention tube  213  through the output shaft  217   a , the gear  218  and the gear  219 , as a result, the rotation sustention tube  213  and the swing arm  204  are integrally rotated. In addition, an one end part of the swing arm  204  is rotated upward by normally rotating the drive motor  217 , and the one end part of the swing arm  204  is rotated downward by reversely rotating the drive motor  217 . 
   &lt;Processing Devices of the Drilling Processing Device  200  and the Auxiliary Processing Device  201 &gt; 
   (Processing Device of the Drilling Processing Device  200 ) 
   As shown in  FIG. 8 , the drilling processing device  200  has a spindle  220  which one end part is rotatably retained by the arm portion  208  through a thrust bearing  220   a  and which a middle part is rotatably retained by the bearing tube section  212 , and a drill  221  as a drilling tool (processing device) fixed attachably and detachably to the spindle  220 . For the fixing of the drill  221  to the spindle  220 , a taper fixing or a zipper or the like may be used. Also, for the drill  221 , a drill portion  221   a  having different diameters and a special drill having reference numeral  221   b  are used. By the way, when the drilling in which its shape is not round is carried out, the drilling tool (processing device) such as an end mill or a reamer is fixed to the spindle  220  as a substitute for the drill  221 . 
   (Processing Device of the Auxiliary Processing Device  201 ) 
   As shown in  FIGS. 7 and 8 , the auxiliary processing device  201  has a rotation shaft (tool fix shaft)  228  rotatably retained to the bearing tube section  211  through a bearing  222 , chamfering stones (grinding processing means)  224  and  225  as the processing tool fixed to the rotation shaft  223 , and a grooving cutter  226  as the processing tool fixed to the rotation shaft  223 . Meanwhile, reference numeral  227  denotes a cover for the processing tool in tub shape which a base end part is attachably and detachably fixed to an outer circumferential surface of the bearing tube section  211 . 
   &lt;Processing Device Driving Means  203 &gt; 
   The processing device driving means  203  has a drive motor  228  such as the pulse motor fixed to the sustention wall  216 . An output shaft (rotating shaft)  229  of the drive motor  228  is rotatably retained in the rotation sustention tube  213  through a bearing  230  and a tip part thereof is disposed inside of the space  206   a  of the swing arm  204 . 
   Also, the processing device driving means  203  has a pulley  231  fixed at the tip part of the output shaft  229 , a pulley  232  provided at the rotation shaft  223 , and a belt  233  bridged between the pulley  231  and the pulley  232 . A power transmission mechanism which is from the drilling processing device  200  to the belt  233  and the pulley  232  constitutes processing device driving means BD 1  (see  FIG. 7 ) shared by the processing devices of the drilling processing device  200  and the auxiliary processing device  201  that are, more specifically, the drill  221 , the chamfering stones  224  and  225  and the grooving cutter  226 . 
   By this structure, rotation of the drive motor  228  is transmitted to the rotation shaft  223  through the output shaft  229 , the pulley  231 , the belt  233  and the pulley  232 . Accordingly, the rotation shaft  223  is driven and rotated, as a result, the chamfering stones  224  and  225  and the grooving cutter  226  which are fixed to the rotation shaft  223  are rotated. 
   In addition, the processing device driving means  203  has a pulley  234  provided at the rotation shaft  223 , a pulley  235  provided at one end part of the spindle  220 , and a belt  236  bridged between the pulley  234  and the pulley  235 . By this structure, rotation transmitted to the rotation shaft  223  is transmitted to the spindle  220  through the pulley  234 , the belt  236  and the pulley  235 . Accordingly, the spindle  220  is driven and rotated, as a result, the drill  221  fixed to the spindle  220  is rotated. 
   &lt;Shaft-to-shaft Distance Adjusting Means  43 &gt; 
   As shown in  FIG. 6 , the distance between the lens rotating shafts  23  and  24  and the grinding stone shaft section  33  is adjusted by shaft-to-shaft distance adjusting means (shaft-to-shaft distance adjusting mechanism)  43 . 
   The shaft-to-shaft distance adjusting means  43  includes a rotating shaft  34  having an axis positioned on the same axis of the grinding stone shaft section  33  as shown in  FIG. 6 . The rotating shaft  34  is rotatably supported on the V-groove of the projected support section  13   e  in  FIG. 5 . 
   Also, the shaft-to-shaft distance adjusting means  43  includes a base  56  held by the rotating shaft  34 ; a pair of parallel guide rails  57  and  57  attached to the base board  56  and obliquely extended upward from the upper surface thereof; a screw shaft (feed screw)  58  rotatably provided on the base board  56  to be parallel to the guide rails  57  and  57 ; a pulse motor  59  provided on the lower surface of the base board  56  for rotating the screw shaft  58 ; and a stage  60  screwed by the screw shaft  58  and held by the guide rails  57  and  57  to move up and down. 
   The shaft-to-shaft distance adjusting means  43  further includes a lens rotating shaft holder  61  disposed above the stage  60  and held by the guide rails  57  and  57  so as to move up and down, and a reinforcement member  62  for holding the upper ends of the guide rails  57  and  57  and rotatably holding the upper end of the screw shaft  68 . The lens rotating shaft holder  61  is always rotatably energized downward by its own weight and by a pressure adjusting mechanism which is not shown to be pressed to the stage  60 . Moreover, a sensor S for detecting an abutment of the lens rotating shaft holder  61  is attached to the stage  60 . 
   When the screw shaft  58  is normally or reversely rotated by a normal or reverse rotation of the pulse motor  59 , the stage  60  is elevated or lowered along the guide rails  57  and  57  by the screw shaft  58 , and then the lens rotating shaft holder  61  is elevated or lowered integrally with the stage  60 . Accordingly, the carriage  22  is swung around the carriage swing shaft  21 . 
   &lt;Lens Thickness Measuring System  18 &gt; 
   The lens thickness measuring system (lens thickness measuring device)  18  includes, as shown in  FIG. 3A  and  FIG. 4 , the measuring element  41  disposed in a rear edge upper part of the processing chamber  4 ; a measurement shaft  42   a  provided parallel to the lens rotating shafts  23  and  24 , one end thereof being provided integrally with the measuring element  41 ; and a measuring unit (detecting unit for detecting moving amount of measuring element)  42  disposed close to the rear edge upper part of the side wall  11   b , and outside of the processing chamber  4 . This measurement shaft  42   a  penetrates the side wall  11   b  to be protruded inside and outside of the processing chamber  4 . 
   (Measuring Element  41 ) 
   The measuring element  41  includes, as shown in  FIG. 3A  and  FIG. 16 , a feeler holding member  100 , and a pair of feelers  101  and  102 . The feeler holding member  100  includes a successively provided portion  100   a  extended left and right, and parallel opposing pieces  100   b  and  100   c  provided to be protruded in the same direction in both left and right ends of the successively provided portion  100   a . The feelers  101  and  102  are formed in cylindrical, and attached to the tips of the opposing pieces  100   b  and  100   c  to face each other. 
   Also, the feeler holding member  100  is fixed to the measurement shaft  42   a  which penetrates the side wall  11   b  and extended in left and right as shown in  FIG. 4 . The measurement shaft  42   a  is retained capable of moving left and right by the measuring unit  42  which is disposed outside of the side wall  11   b . As shown in  FIG. 16 , the measuring element  41  and the measuring unit  42  constitute lens thickness shape measuring means B. 
   (Measuring Unit  42 ) 
   The measuring unit  42  has a frame shown by a plurality of reference numerals  240  as shown in  FIG. 16 . In the drawing, although the frame has been shown by the plurality of reference numerals as a simplicity reason for explanation, in fact, it is one frame constituted by a plurality of members. 
   The measuring unit  42  has a sustention tube  241  which is rotatably retained to the measurement shaft  42   a  and is retained incapable of moving relatively in the axis direction of the measurement shaft  42   a , and springs  242  and  243  which are to retain the sustention tube  241  capable of advancing and retracting in the axis direction to the frame  240  at a predetermined position. 
   Furthermore, the measuring unit  42  has a magnescale  244  for measuring a movement of the measurement shaft  42   a  in the axis direction, measuring element rotating means  245  for rotating the measuring element  41  between an using position and an unused position, and measurement shaft advancing-retracting means  246  for compulsorily driving the measuring element  41  in the axis direction of the measurement shaft  42   a.    
   The magnescale  244  has a magnetic scale  244   a  retained by the frame  240 , and a reading head  244   b  which is provided integrally with the sustention tube  241  and reads a magnetic field distribution of the magnetic scale  244   a . Accordingly, an amount of movement of the measuring element  41  in the axis direction of the measurement shaft  42   a  can be read. 
   The measuring element rotating means  245  has a drive motor  247  retained by the frame  240 ; an arm  248  fixed at an output shaft  247   a  of the drive motor  247 ; an arm  249  fixed at an end part of the measurement shaft  42   a ; and a connection shaft  250  which is retained integrally with the arm  249  in parallel to the measurement shaft  42   a  and slidably penetrates the arm  248 . Accordingly, rotation of the drive motor  247  is transmitted to the measurement shaft  42   a  through the arms  248  and  249  and the connection shaft  250 , as a result, the measurement shaft  42   a  is adapted to be rotated in about the axis line. In this case, a range of rotation of the measurement shaft  42   a  rotated by the drive motor  247  is set to be carried out in a range between a stored position of the measuring element  41  which is an upraised position thereof and the using position of the measuring element  41  which the measuring element  41  is horizontally prostrated. 
   The measurement shaft advancing-retracting means  246  has a rack  251  provided at the measurement shaft  42   a ; a gear (pinion)  252  which is rotatably retained by the frame  240  and gears with the rack  251 ; a drive motor  253  such as the pulse motor retained by the frame  240 ; a gear rotation mechanism  254  which interlocks with the drive motor  253 ; and an electromagnetic clutch  255  for carrying out a connection and a disconnection between the gear rotation mechanism  254  and the gear  252 . According to this structure, if the drive motor  253  is normally or reversely rotated when the electromagnetic clutch  255  is turned ON, a normal rotation or a reverse rotation of the drive motor  253  is transmitted to the measurement shaft  42   a  through the gear rotation mechanism, the electromagnetic clutch  255 , the gear  252  and the rack  251 , as a result, the measurement shaft  42   a  is adapted to be advanced and retracted in the axis direction. Meanwhile, each teeth of the rack  251  extends circularly in circumferential direction. Accordingly, a gearing position between the rack  251  and the gear  252  in the axis direction does not change even if the measurement shaft  42   a  is rotated. 
   (Control Circuit) 
   The above described operation panels  6  and  7  (that is, the switches of the operation panels  6  and  7 ) are connected to an arithmetic control circuit (arithmetic control means)  80  including a CPU as shown in  FIG. 17 . Also, the arithmetic control circuit  80  is connected to a ROM  81  as storage means, a data memory  82  as storage means, a RAM  83  and a correction value memory  84 . 
   Moreover, the arithmetic control circuit  80  is connected to the liquid crystal display device  8  through a display driver  85  and to a pulse motor driver (pulse motor driving circuit)  86 . The pulse motor driver  86  is controlled in motion thereof by the arithmetic control circuit  80  to control the motion of the various kinds of the drive motors in the grinding processing section  10  or the like, that is, the base drive motor  14 , the lens rotating shaft drive motor  25 , the pulse motors  24   d  and the  59 , the drive motor  217 , the drive motor  228  and the drive motor  253  or the like. 
   The arithmetic control circuit  80  is further connected to the grinding stone drive motor  30  through a motor driver (motor drive circuit)  86   a , and to the electromagnetic clutch  255 . 
   Furthermore, the arithmetic control circuit  80  is connected to the frame shape measuring device  1  in  FIG. 1  through a communication port  88  to receive the lens shape data such as the frame shape data, lens shape data and the data on position of the hole for fixing the point frame from the frame shape measuring device (lens shape measuring device)  1 . 
   In addition, the arithmetic control circuit  80  being set so that a measurement signal (detection signal of amount of movement of measuring element) from the magnescale  244  is inputted. 
   The arithmetic control circuit  80  determines each of the coordinate positions of the front refractive surface (the left surface of the eyeglass lens in  FIG. 9 ) of the eyeglass lens ML and the rear refractive surface (the right surface of the eyeglass lens in  FIG. 9 ) thereof at the lens shape data (θi, ρi), based on a drive pulse for the base drive motor  14 , drive pulses for the lens rotating shaft drive motor  25 , pulse motor  59  or the like which are controlled in motion thereof based on the lens shape data (θi, ρi), from the frame shape measuring device  1 , and the amount of movement detection signal from the measuring unit  42 . Subsequently, the arithmetic control circuit  80  determines a lens thickness Wi at the lens shape data (θi, ρi) by calculation from the determined coordinate positions of the front and rear refractive surfaces of the eyeglass lens ML. 
   When the arithmetic control circuit  80  reads out data from the frame shape measuring device  1  or reads out data stored in storage areas m 1  to m 8  of the data memory  82  after starting control of processing, the arithmetic control circuit  80  performs the control of processing and the control of the data reading or the layout setting in a time-sharing mode. 
   More specifically, when a period between time t 1  and t 2  is T 1 , a period between time t 2  and t 3  is T 2 , a period between time t 3  and t 4  is T 3 , . . . , a period between time tn−1 and tn is Tn, then the control of processing is performed during the periods T 1 , T 3 , . . . , and Tn, and the control of the data reading and the layout setting are performed during the periods T 2 , T 4 , . . . , Tn−1. Accordingly, during the grinding processing of the lens which is to be processed, the reading and storing of the next plurality of lens shape data and the data on position of the hole for fixing the point frame, the data reading, the layout setting (adjustment) or the like can be performed, therefore, considerably improving a work efficiency of data processing. 
   Also, various kinds of programs for controlling the operations of the lens grinding processing apparatus  2  are stored in the above described ROM  81 . The data memory  82  is provided with the plurality of data storage areas. Moreover, the RAM  83  is provided with: a processing data storage area  83   a  for storing the processing data for the lens currently in processing; a new data storage area  83   b  for storing new data; and a data storage area  83   c  for storing the frame data, data for the lens already processed or the like. 
   By the way, for the data memory  82 , a readable and writable FEEPROM (flash EEPROM) can be employed, or a RAM using a backup power supply can be employed, in which the content thereof cannot be erased even when the main power supply is turned off. 
   Moreover, the arithmetic control circuit  80  carries out controls of the above mentioned hole diameter variability means and hole shape variability means based on the data on position of the hole for fixing the point frame stored in the data memory  82 . More specifically, the arithmetic control circuit  80  automatically controls the positioning of the drilling tool to the rimless lens, rotating speed of the drilling tool, relative movement between the drilling tool and the rimless lens and moving speed thereof and condition of the movement thereof 
   Meanwhile, when drilling the hole into the rimless lens by the hole diameter variability means, the drilling tool, more specifically, the special drill is rotated with a predetermined rotating speed. On the other hand, when drilling the hole into the rimless lens by the bole shape variability means, the drilling tool, that is, the reamer or the end mill is not rotated, and the arithmetic control circuit  80  controls the relative movement of the drilling tool and the rimless lens such as controlling in such a manner as to move the rimless lens two-dimensionally or three-dimensionally. Accordingly, the hole having the different diameters or the different shapes can be automatically formed to the rimless lens. 
   The operations of the hole diameter variability means and the hole shape variability means are carried out by an operation button (not shown) provided on the operation panels  6  and  7 . 
   [Operation] 
   Next, operations of the lens grinding processing apparatus having the arithmetic control circuit  80  and the above mentioned hole diameter variability means or the hole shape variability means in such structures described above will be described. 
   (1) Retention of Eyeglass Lens ML Between Lens Rotating Shafts  23  and  24   
   In such structure as described above, the adjustable joint  301  and the lens retainer  320  are fixed at the opposed end sections of the lens rotating shafts  23  and  24  in advance. When retaining the eyeglass lens ML between the adjustable joint  301  and the lens retainer  320 , the pulse motor  24   d  is controlled in motion by the arithmetic control circuit  80  and the lens rotating shaft  24  is driven in a direction separating from the lens rotating shaft  23  by operating the operation panels  6  and  7  so as to widen the distance between the adjustable joint  301  and the lens retainer  320  as shown in  FIG. 24 . By the way,  FIGS. 24 to 29  abbreviatedly show the structure in the  FIGS. 13A and 14  by omitting partial of the structure in  FIGS. 13A and 14 , therefore, the lens absorption device  300  and the lens retainer  320  in  FIGS. 24 to 29  actually have the structure shown in  FIGS. 13A and 14 . Accordingly, the detailed descriptions of the lens absorption device  300  and the lens retainer  320  will be made with reference to the structure in  FIGS. 13A and 14 , and at this time, the description of these figures are omitted. 
   Meanwhile, the lens absorption board  302  which the circular and unprocessed eyeglass lens ML is sucked to the absorption cup  302   b  is provided in advance. In addition, the shaft portion  302   a  of the lens absorption board  302  is fitted to the hole section  305   c  which is provided at the hemispheric member  305  of the adjustable joint  301 . At this time, the rotation restricting pin  302   c  of the shaft portion  302   a  is engaged with the rotation restricting groove  305   e  of the hemispheric member  305  so that the relative rotation by the shaft portion  302   a  and the hemispheric member  305  are restricted. 
   By the way, the lens absorption board  302  can be constituted by a conventional structure which a rotation restricting groove (positioning groove)  302   d  is provided at an end surface of the shaft portion  302   a  as shown in  FIG. 24 . In this case, by providing a rotation restricting convex portion which engages with the rotation restricting groove  302   d  at the hole section  305   c , the relative rotation between the shaft portion  302   a  and the hemispheric member  305  about the axis can be restricted.  FIG. 24  is a general explanatory view which the lens absorption board (lens fixing board) is fixed to the adjustable joint (spheroid connection, spheroid joint)  301  in such the way as described above. 
   Also, the lens absorption board  302  may be a type that retains the eyeglass les by using an adhesive or an agglutinant without utilizing the absorption cup  302   b  such as a rubber. Furthermore, a diameter of the lens absorption board  302  may be set substantially same as diameters of the both end surfaces of the hemispheric members  304  and  324  as shown in  FIG. 25 . 
   Subsequently, the pulse motor  24   d  is controlled in motion by the arithmetic control circuit  80  by operating the operation panels  6  and  7  so that the lens rotating shaft  24  is driven in the approaching direction to the side of the lens rotating shaft  23 . At this time, by narrowing the distance between the adjustable joint  301  and the lens retainer  320  and attaching the lens retainer  320  to the rear side refractive surface of the eyeglass lens ML which is retained by the lens absorption board  302  of the adjustable joint  301  with a predetermined pressure, the eyeglass lens ML is clamped and held between the adjustable joint  301  and the lens retainer  320  like shown in  FIG. 25 . A clamping force in this case can be detected by detecting a driving current of the pulse motor  24   d  or the like. In addition, the clamping force may be detected by a pressure sensor or the like. This clamping force is, for example, set substantially 60 kg as a main clamping. 
   By clamping in such the way as described above, the hemispheric hole  303   a  and the hemispheric member  304 , and the hemispheric member  304  and the hemispheric member  305  are mutually engaged with a certain degree or more of the friction, so that the rotation of the hemispheric members  304  and  305  in the extending directions of the key grooves  303   b  and  304   b  can be avoided even when the force (force in direction of the rotation during the grinding processing or a grinding force by the chamfering stone during the grinding processing) exceeding the predetermined level is acted. Similarly, the hemispheric hole  323   a  and the hemispheric member  324  are mutually engaged with a certain degree or more of the friction, so that the rotation of the hemispheric member  324  can be avoided even when the force exceeding the predetermined level is acted. 
   Accordingly, the eyeglass lens ML is retained between the lens rotating shafts  23  and  24  in such condition as described above. 
   (2) Reading of Lens Shape Data 
   When the measuring element  41  is not used, the arithmetic control circuit  80  positions the measuring element  41  at the stored position which the measuring element  41  is in the upraised state by controlling the drive motor  247  in motion. 
   In a starting stand-by state, when the main power supply is turned on, the arithmetic control circuit  80  judges as to whether or not data reading from the frame shape measuring device  1  is to be carried out. 
   More specifically, the arithmetic control circuit  80  judges as to whether or not the “data request” switch  7   c  on the operation panel  6  is pressed. When the “data request” switch  7   c  is pressed for requesting data, data of the lens shape information (θi, ρi) and the data on position of the hole for fixing the point frame are read from the frame shape measuring device  1  into the data reading area  83   b  of the RAM  83 . The read data is stored (recorded) in any one of the storage areas m 1  to m 8  of the data memory  82 , and then the layout screen is displayed on the liquid crystal display device  8 . 
   (3) Calculation on Processing Data 
   Next, the arithmetic control circuit  80  allows the measurement shaft  42   a  to be in a state that it can be moved freely in the axis direction by turning the electromagnetic clutch  255  OFF prior to the measurement. Also, the arithmetic control circuit  80  controls the base drive motor  14  in motion to drive and control the carriage  22  so that the carriage  22  is advanced and retracted in the axis direction thereof by the screw shaft  15 , and the eyeglass lens ML is moved integrally with the lens rotating shafts  23  and  24  in its axis direction so that the eyeglass lens ML is corresponded to the center of the feelers  101  and  102  of the measuring element  41 . 
   Subsequently, the arithmetic control circuit  80  moves the lens rotating shafts  23  and  24  of the carriage  22  to the upper part along the guide slits  11   a   1  and  11   b   2  by raising the front end part of the carriage  22  by controlling the pulse motor  59  in motion so as to move the eyeglass lens (lens to be processed) ML which is held between the lens rotating shafts  23  and  24  to the upper part in such a manner that the eyeglass lens ML draws the arc. Then, the arithmetic control circuit  80  moves the measurement shaft  42   a  by controlling the drive motor  247  in motion so that the measuring element  41  is rotated from the stored position which the measuring element  41  is in upraised state to the using position which the measuring element  41  is horizontally prostrated, as a result, the feelers  101  and  102  of the measuring element  41  are faced toward both sides of the eyeglass lens ML. 
   In this condition, by controlling the base drive motor  14  in motion, the arithmetic control circuit  80  drives and controls the carriage  22  in its axis direction by the screw shaft  15  to move the eyeglass lens ML integrally with the lens rotating shafts  23  and  24  in the axis direction thereof and to the direction of the side of the feeler  101  of the measuring element  41 , and the front side refractive surface of the eyeglass lens ML is contacted with the feeler  101 . The arithmetic control circuit  80  further moves the carriage  22  more than the attached position of the eyeglass lens ML and the feeler  101 , and stops the carriage  22 . 
   As shown in  FIG. 26 , after attached (contacted) the feeler  101  to the front side refractive surface of the eyeglass lens (lens to be processed) ML in such the way as described above, the arithmetic control circuit  80  contacts and moves the feeler  101  and the front side refractive surface of the eyeglass lens ML relatively based on the lens shape data (θi, ρi) by controlling the lens rotating shaft drive motor  25  and the pulse motor  59  in motion based on lens shape information (θi, ρi) as the lens shape data. 
   At this time, the feeler  101  is moved left and right according to a curvature of the front side refractive surface of the eyeglass lens ML, and an amount of movement in the left and right is measured by the measuring unit  42  through the measurement shaft  42   a . More specifically, the amount of movement of the feeler  101  in the left and right is measured by the magnescale  244  of the measuring unit  42 . 
   The measurement signal from the magnescale  244  of the measuring unit  42  is inputted into the arithmetic control circuit  80 , and the arithmetic control circuit  80  obtains the coordinate positions at the front side refractive surface of the eyeglass lens ML in the lens shape data (θi, ρi) based on the measurement signal received from the magnescale  244 . 
   Similarly, by attaching (contacting) the feeler  102  to the rear side refractive surface of the eyeglass lens (lens to be processed) ML like shown in  FIG. 27  by controlling the measuring unit  42  in motion and by controlling the lens rotating shaft drive motor  25  and the pulse motor  59  in motion based on the lens shape data (θi, ρi), the arithmetic control circuit  80  contacts and moves the feeler  102  and the rear side refractive surface of the eyeglass lens ML relatively based on the lens shape data (θi, ρi). At this time, the feeler  102  is moved left and right according to a curvature of the rear side refractive surface of the eyeglass lens ML, and the amount of movement in the left and right is measured by the measuring unit  42  through the measurement shaft  42   a . The measurement signal from the magnescale  244  of the measuring unit  42  is inputted into the arithmetic control circuit  80 , and the arithmetic control circuit  80  obtains the coordinate positions at the rear side refractive surface of the eyeglass lens ML in the lens shape data (θi, ρi) based on the measurement signal received from the magnescale  244 . 
   Since a method disclosed in Japanese Patent Application No. 2001-30279 can be employed as a more specific method for obtaining the coordinate positions of the front side refractive surface or the coordinate positions of the rear side refractive surface as described above, its detailed description is therefore omitted. 
   Then, the lens thickness Wi is obtained by calculation from the coordinate positions of the front side refractive surface and the coordinate positions of the rear side refractive surface in the obtained lens shape data (θi, ρi). 
   Later, the arithmetic control circuit  80  obtains the processing data (θi′, ρi′) of the eyeglass lens ML corresponding to the lens shape data (θi, ρi) from data such as a pupil distance PD based on a formula of the eyeglass lens and a frame geometrical center-to-center distance FPD, a raised amount or the like, and is stored in the processing data storage area  83   a . After such measurement is completed, the arithmetic control circuit  80  upraises the measuring element  41  to the stored position thereof by controlling the drive motor  247  in motion. 
   (4) Grinding Processing 
   Subsequently, the arithmetic control circuit  80  controls the motion of the grinding stone drive motor  30  with the motor driver  86   a  to control rotary-driving of the grinding stone  35  in a clockwise direction in  FIG. 6 . The grinding stone  35  includes the rough grinding stone (flat grinding stone), the grinding stone for a V-groove, the finish grinding stone or the like, as described above. 
   On the other hand, the arithmetic control circuit  80  controls the drive of the lens rotating shaft drive motor  25  through the pulse motor driver  86  based on the processing data (θi′, ρi′) stored in the processing data storage area  83   a  in order to control the rotation of the lens rotating shafts  23  and  24  and the eyeglass lens ML in a half-clockwise direction in  FIG. 6 . 
   At this time, the arithmetic control circuit  80  first controls the motion of the pulse motor driver  86  at the position where i=0 based on the processing data (θi′, ρi′) stored in the processing data storage area  83   a  in order to control the drive of the pulse motor  59 . Accordingly, the screw shaft  58  is rotated reversely, and the stage  60  is lowered by predetermined amount. With the lowering of the stage  60 , the lens rotating shaft holder  61  is integrally lowered with the stage  60  by the own weight of the carriage  22 . 
   After the unprocessed circular eyeglass lens ML abuts a grinding surface  35   a  of the grinding stone  35  by the own weight of the carriage  22  as shown in  FIG. 18A , only the stage  60  is lowered. When the stage  60  is separated downward from the lens rotating shaft holder  61  by such lowering, the separation is detected by the sensor S, and the detecting signals from the sensor S are inputted into the arithmetic control circuit  80 . On receiving the detecting signals from the sensor S, the arithmetic control circuit  80  further controls the drive of the pulse motor  59  to slightly lower the stage  60  by the predetermined amount. 
   Accordingly, the grinding stone  35  attaches to the eyeglass lens ML as shown in  FIG. 28 , and the eyeglass lens ML is ground with the grinding stone  35  by the predetermined amount at the processing data (θi′, ρi′) where i=0. When the lens rotating shaft holder  61  is lowered with the grinding to abut the stage  60 , the sensor S detects the abutment to output the detecting signals, and then the detecting signals are inputted into the arithmetic control circuit  80 . 
   On receiving the detecting signals, the arithmetic control circuit  80  allows the eyeglass lens ML to be ground by the grinding stone  36  in a manner that the case where i=1 of the processing data (θi′, ρi′) is similar to that where i=0 thereof. The arithmetic control circuit  80  carries out such control until i=n (360°), so that the circumferential edge of the eyeglass lens ML is ground by the rough grinding stone which is not shown of the grinding stone  35  to be a radius vector ρi′ for each angle θ′ of the processing data (θi′, ρi′). Accordingly, a part shown by oblique lines c as shown in  FIG. 18B  is ground and removed so that the lens shaped eyeglass lens ML is formed in such that shown in  FIG. 18C . 
   By the way, the lens shape information (θi, ρi), drilling processing positions Pa (θa, ρa), and Pb (θb, ρb) which are described later, can be obtained by the arithmetic control circuit  80 . Therefore, the process of processing operation can be curtailed by carrying out the drilling process to the lens (unprocessed circular eyeglass lens ML) for the point frame at first as shown in FIG.  18 A′ and then obtaining the eyeglass lens ML shown in FIG.  18 C′ by grinding and processing the part of the circumference of the lens for the point frame shown by the oblique lines c like shown in FIG.  18 B′ after forming fixing holes  400  and  401 . 
   When drilling such fixing holes  400  and  401  like shown in  FIG. 18D  into the eyeglass lens ML by the drilling processing apparatus after processing the circumference of the eyeglass lens ML as shown in  FIG. 18C , since a distance from the drilling processing positions to the lens circumference part is short, a cracking or a chipping tends to occur easily at the circumference part of the eyeglass lens ML as the lens thickness becomes thinner if drilling the fixing holes  400  and  401  by the drilling processing device into the eyeglass lens in such condition. 
   However, when the fixing holes  400  and  401  are drilled into the unprocessed circular eyeglass lens ML by the drilling processing device as shown in FIG.  18 A′ before the unprocessed circular eyeglass lens ML is ground and processed, since the distance from the drilling processing position to the lens circumference part is long, the cracking or the chipping becomes difficult to occur if drilling the fixing holes  400  and  401  into the unprocessed circular eyeglass lens ML by the drilling processing apparatus in such condition, as a result, the drilling process in high accuracy can be realized, and therefore, reliability in the processing operation can be enhanced. 
   (Chamfering Process) 
   After the lens shaped eyeglass lens ML is formed, a lens edge of the circumference of the eyeglass lens ML is chamfered and processed by the chamfering stones  224  and  225 . The chamfering process is carried out as follows. 
   By normally rotating the drive motor  217 , the arithmetic control circuit  80  raises the tip of the swing arm  204  by a predetermined amount by moving the one end part of the swing arm  204  to the upper part so as to raise the chamfering stones  224  and  225  fixed to the rotation shaft  223  to a predetermined position. 
   On the other hand, the arithmetic control circuit  80  corresponds the lens edge of the eyeglass lens ML retained between the lens rotating shafts  23  and  24  to a peripheral surface of the chamfering stone  224  by driving and controlling the base drive motor  14 . Also, the arithmetic control circuit  80  corresponds the eyeglass lens ML to the chamfering stone  224  at a part where having an angle θ based on the processing data (θi′, ρi′) by synchronously rotating the lens rotating shafts  23  and  24  by driving and controlling the lens rotating shaft drive motor  25 . 
   In this state, the arithmetic control circuit  80  lowers the lens rotating shafts  23  and  24  and the eyeglass lens ML by controlling the pulse motor  59  in motion. When the part of the eyeglass lens ML having the angle θ is abutted to the peripheral surface of the chamfering stone  224 , the sensor S detects the abutment thereof, and the detecting signals are inputted into the arithmetic control circuit  80 . Moreover, the arithmetic control circuit  80  stops the driving of the pulse motor  59  when received the detecting signals. A position where the part of the eyeglass lens ML having the angle θ is abutted to the peripheral surface of the chamfering stone  224  becomes a reference position for carrying out the chamfering process of the eyeglass lens ML. 
   After separating the eyeglass lens ML from the chamfering stone  224  by raising the lens rotating shafts  23  and  24  and the eyeglass lens ML by the predetermined amount by driving and controlling the pulse motor  59  controlled by the arithmetic control circuit  80 , the arithmetic control circuit  80  drives and controls the drive motor  228  so as to rotate and drive this drive motor  228 . The rotation of the drive motor  228  is transmitted to the rotation shaft  223  through the output shaft  229 , the pulley  231 , the belt  233  and the pulley  232 . Accordingly, the rotation shaft  223  is rotated, and the chamfering stones  224  and  225  and the grooving cutter  226  which are fixed to the rotation shaft  223  are rotated. 
   In this state, the chamfering process (rough chamfering grinding) is carried out to the lens edge of the eyeglass lens ML by abutting the chamfering atone  224  to the lens edge of the eyeglass lens ML by driving and controlling the base drive motor  14 , the lens rotating shaft drive motor  25  and the pulse motor  59  based on the reference position and the processing data (θi′, ρi′). 
   Similarly, the chamfering is carried out to the eyeglass lens ML with the chamfering stone  225  subsequently which is used for the finishing. 
   (5) Drilling Process 
   If the eyeglass lens ML ground and chamfered as described above is for the point frame, it is required to drill the fixing hole (hole for fixing point frame)  400  for fixing the bridge to the nose pad side of the eyeglass lens ML and the fixing hole (hole for fixing point frame)  401  for fixing the fixing attachment which is to fix the temple to the temple side. Meanwhile, the nose pad has been fixed to the bridge. 
   Therefore, a fact that it is the process for the point frame is inputted into the arithmetic control circuit  80  by the control panels  6  and  7  before carrying out the processing. Accordingly, when the process of grinding the circumference of the eyeglass lens ML to the lens shape based on the processing data (θi′, ρi′) is finished, the arithmetic control circuit  80  prepares for carrying out the drilling process. Hereunder, description of a preparing operation for the drilling process will be made with reference to  FIG. 22 . 
   (Calculation on Drilling Processing Position) 
   When the process of grinding the circumference of the eyeglass lens ML is finished, the arithmetic control circuit  80  obtains a curvature change φi of the front side refractive surface of the eyeglass lens ML from a change in the lens thickness Wi in the lens shape data (θi, ρi) obtained by the measurement. 
   On the other hand, the arithmetic control circuit  80  obtains the drilling processing positions Pa (θa, ρa), and Pb (θb, ρb) for drilling the fixing holes  400  and  401  from the lens shape data (θi, ρi) and the curvature change φi of the front side refractive surface of the eyeglass lens ML. Here, since methods for calculating the drilling processing positions Pa (θa, ρa), and Pb (θb, ρb) are the same, the description on the method for calculating the drilling processing position Pa (θa, ρa) will be made hereinafter, and the description on the method for calculating the drilling processing position Pb (θb, ρb) is omitted. 
   A case that the processing position of the fixing hole  400  corresponds to the drilling processing position Pa (θa, ρa) in  FIG. 21  will be described. When the position of the lens edge which corresponds to the drilling processing position Pa (θa, ρa) is obtained from the lens shape data (θi, ρi) by presuming that the lens edge is Pj (θj, ρj), a point Pa from a radius vector ρj of the lens edge Pj (θj, ρj) to direction of a center O of the eyeglass lens ML by a Δx becomes the drilling processing position Pa (θa=θj, ρa) in  FIG. 22 . 
   By the way, the curvature change φi can be obtained by measuring a vicinity of the drilling processing position Pa (θa=θj, ρa) with the measuring element  41  in advance. In practice, the curvature change φi is obtained by obtaining the drilling processing position Pa (θa=θj, ρa) based on the lens shape data (θi, ρi) and relatively moving the measuring element  41  toward a direction of the radius vector to the eyeglass lens ML by setting the drilling processing position Pa (θa=θj, ρa) as a center. This movement can be carried out by elevating and lowering the tip of the carriage  22  by the pulse motor  59 . Therefore, the curvature change φi is obtained by memorizing a moving position ΔZ of the measuring element  41  toward an axis Z direction of the lens rotating shafts  23  and  24  at the time when the measuring element  41  is moved in the direction of the radius vector via the drilling processing position Pa (θa=θj, ρa), thereby the curvature change φi is obtained. 
   In addition, when drilling the fixing hole  400  into the eyeglass lens ML by the drill  221 , an angle of gradient β is obtained from the drilling processing position Pa (θa, ρa) and a curvature of the front side refractive surface to slant the eyeglass lens ML by the measuring element  41  in such a manner that the axis of the drill  221  becomes in perpendicular to a tangent in the position of the drilling processing position Pa (θa, ρa) of the eyeglass lens ML. Here, when presuming that the axis of the lens rotating shafts  23  and  24  is Z, and a direction in perpendicular to the axis Z is a Y axis, then the β is the angle of gradient to the Y axis. 
   At this time, a movement data regarding how much and in which direction should the eyeglass lens ML be moved in the drilling processing position Pa (θa, ρa) so that the axis of the drill  221  becomes in perpendicular to the tangent in the position of the drilling processing position Pa (θa, ρa) of the eyeglass lens ML is obtained. Meanwhile, the axis of the drill  221  is presumed to be arranged parallel to the axis Z of the lens rotating shafts  23  and  24 . 
   In this state, when presuming that the tangent of the front side refractive surface in the drilling processing position Pa (θa, ρa) is Q 1 , a normal line of the front side refractive surface in the drilling processing position Pa (θa, ρa) is Q 2 , and an angle between the normal line Q 2  and the axis Z is γ, then a condition that the normal line Q 2  becomes parallel to the axis Z is a drilling processing position Pa′ (θa, ρa′) when the eyeglass lens ML is slanted to the Y axis by the angle β (=γ−α). The angle between the normal line Q 2  in the drilling processing position Pa (θa, ρa) and the axis Z can be obtained by the lens shape data (θi, ρi) and the curvature change φi of the front side refractive surface of the eyeglass lens ML. 
   At this time, if a center of the thickness of the eyeglass lens ML on the axis Z of the lens rotating shafts  23  and  24  is presumed as O, the eyeglass lens ML can be slanted by setting the center O as a center. Accordingly, the center O is presumed as a “0” position, a position from the center O to the drilling processing position Pa (θa, ρa) in the Z direction is presumed as a Z 1 , a distance from the center O to the drilling processing position Pa (θa, ρa) is presumed as ra, and an angle between the θa and the ra in the drilling processing position Pa (θa, ρa) is presumed as an α. 
   Also, when the eyeglass lens ML is slanted by the angle β, a change in the drilling processing position Pa′ (θa, ρa′) is presumed as a Δρa, and a position from the center O to the drilling processing position Pa′ (θa, ρa′) toward the Z direction is presumed as a Z 2 , so as to obtain the movement data ρa′ and an amount of movement Δz in the Z direction. 
   This Δz can be obtained as a following formula:
 
Δ z=|Z   1 |+| Z   2 |= Z   1 +sin β= Z   1 +sin γ
 
   Also, the ra and the Z 1  have a relation of
 
 Z   1 = ra ·sin α
 
   Therefore, the ra becomes
 
 ra=Z   1 /sin α
 
   In addition, the ρa′ can be obtained as 
               ρ   ⁢           ⁢     a   ′       =         ρ   ⁢           ⁢   a     -     Δ   ⁢           ⁢   ρ   ⁢           ⁢   a       =         ra   ·   cos     ⁢           ⁢   β     =     ra   ·     cos   ⁡     (     γ   -   α     )                         =         (       Z1   /   sin     ⁢           ⁢   α     )     ·   cos     ⁢           ⁢     (     γ   -   α     )                 
 
(Detection of Amount of Movement ΔZa by Pressing of Rear Side Refractive Surface by Feeler  102 )
 
   When slanting the eyeglass lens ML based on the movement data ρa′ and the amount of movement Δz in the Z direction, the feeler  102  of the measuring element  41  is required to be moved to the front side by abutting the feeler  102  to the rear side refractive surface of the eyeglass lens ML. 
   Here, in a condition which the eyeglass lens ML is not slanted, a position Z 3  in the Z axis direction of a part of the drilling processing position Pa (θa, ρa) in the rear side refractive surface of the eyeglass lens ML can be obtained by the position of the rear side refractive surface in the lens edge Pj (θj, ρj) of the eyeglass lens ML and the curvature change of the rear side refractive surface. In addition, a lens thickness Wa at this position can also be obtained from a lens thickness Wj and the curvature change φi of the rear side refractive surface and the curvature change φi of the front side refractive surface. By the way, the position Z 3  in the Z axis direction of the drilling processing position Pa (θa, ρa) and the lens thickness Wa may be obtained by the measurement by the measuring element  41  after carrying out the measurement based on the lens shape data (θi, ρi) of the eyeglass lens ML. 
   Furthermore, by presuming that a lens thickness which is in a parallel direction to the axis Z of the eyeglass lens ML when slanting the eyeglass lens ML by the angle β is a lens thickness Wa′, the lens thickness Wa′ can be obtained as:
 
 Wa′=Wa ·cos γ
 
   In addition, a position Z 4  in the axis Z direction of the rear side refractive surface of the eyeglass lens ML in the position of the lens thickness Wa′ is obtained as:
 
 Z   4 = Z   2 − Wa ·cos γ
 
   Therefore, the eyeglass lens ML can be slanted by the angle β by carrying out a displacement by a pressing to the rear side refractive surface of the eyeglass lens ML toward the front side refractive surface in the part of the drilling processing position Pa (θa, ρa) by an amount of movement ΔZa. 
   The amount of movement ΔZa can be obtained as: 
               Δ   ⁢           ⁢   Za     =          Z3        +          Z2   -     Wa   ′                          =     Z3   +          Z2   -       Wa   ·   cos     ⁢           ⁢   γ                        
 
   The angle of gradient or the movement data is similarly obtained as well as to the drilling processing position Pb (θb, ρb). 
   (Provisional Clamping of the Eyeglass Lens ML) 
   Next, the arithmetic control circuit  80  sets the eyeglass lens ML in a provisional clamped condition between the adjustable joint  301  and the lens retainer  320  by controlling the pulse motor  24   d  in motion to drive the lens rotating shaft  24  in the direction separating slightly from the lens rotating shaft  23  so that the distance between the adjustable joint  301  and the lens retainer  320  is widened, accordingly a pressing force of the lens retainer  320  to the rear side refractive surface of the eyeglass lens ML retained by the lens absorption board  302  of the adjustable joint  301  is loosened to 10 kg for example (by the way, this numerical value is one of the example, and the value may be set larger or oppositely, smaller, and the value can also be changed depending on the thickness of the eyeglass lens) like shown in  FIG. 29 , thereby the eyeglass lens ML is in the provisional clamped condition between the adjustable joint  301  and the lens retainer  320 . At this time, when the eyeglass lens ML is pressed by a light force toward the extending directions of the lens rotating shafts  23  and  24 , the adjustable joints  301  and  321  are rotated, and the eyeglass lens ML becomes such a condition being slanted in the pressed direction. 
   (Slanting and Adjusting for Drilling of Eyeglass Lens ML) 
   Next, the arithmetic control circuit  80  controls the base drive motor  14  in motion to drive and control the carriage  22  so that the carriage  22  is advanced and retracted in the axis direction thereof by the screw shaft  15 , and the eyeglass lens ML is moved integrally with the lens rotating shafts  23  and  24  in its axis direction so that the eyeglass lens ML is corresponded to the center of the feelers  101  and  102  of the measuring element  41 . 
   Then, the arithmetic control circuit  80  moves the lens rotating shafts  23  and  24  of the carriage  22  to the upper part along the guide slits  11   a   1  and  11   b   2  by raising the front end part of the carriage  22  by controlling the pulse motor  59  in motion so as to move the eyeglass lens (lens to be processed) ML which is held between the lens rotating shafts  23  and  24  to the upper part in such a manner that the eyeglass lens ML draws the arc. 
   Subsequently, the arithmetic control circuit  80  moves the measurement shaft  42   a  by controlling the drive motor  247  in motion so that the measuring element  41  is rotated from the stored position which the measuring element  41  is in upraised state to the using position which the measuring element  41  is horizontally prostrated, as a result, the feelers  101  and  102  of the measuring element  41  are faced toward the both sides of the eyeglass lens ML. Also, the arithmetic control circuit  80  turns the electromagnetic clutch  255  ON so as to set the measurement shaft  42   a  in a condition capable of advancing and retracting in the axis direction by the drive motor  253  which is a pulse motor along with facing the feelers  101  and  102  of the measuring element  41  toward the both sides of the eyeglass lens ML as stated above. 
   Furthermore, by controlling the lens rotating shaft drive motor  25  in motion, the arithmetic control circuit  80  transmits the rotation of the power transmission shaft  25   a  to the lens rotating shaft  23  through the drive gear  26  and the driven gear  26   a  so that the lens rotating shaft  23  and the pulley  27  are integrally rotated and driven. The rotation of the pulley  27  is transmitted to the pulley  29  through the driving side belt  28   d , the transmission pulley  28   a , the transmission shaft  28   c , transmission pulley  28   b  and the driven side belt  28   e  so that the pulley  29  and the lens rotating shaft  24  are integrally rotated. At the time of this control, the arithmetic control circuit  80  sets a rotation angle θa of the lens rotating shafts  23  and  24  (that is, the eyeglass lens ML) and the tip of the feeler  102  to be correspond. 
   Moreover, the arithmetic control circuit  80  sets the tip of the feeler  102  to be correspond to a radius vector ρa in the drilling processing position Pa (θa, ρa) of the eyeglass lens ML retained between the lens rotating shafts  23  and  24  by controlling the pulse motor  59  in motion to elevate and lower the tip of the carriage  22  with the lens rotating shafts  23  and  24 . 
   In this state, the arithmetic control circuit  80  controls the drive motor  253  in motion to transmit the rotation of the drive motor  253  to the measurement shaft  42   a  through the gear rotation mechanism  254 , the electromagnetic clutch  255 , the gear  252  and the rack  251 , so that the measurement shaft  42   a  is controlled and driven in such a manner that the measurement shaft  42   a  is advanced and retracted. Accordingly, the feeler  102  of the measurement element  41  is moved to the side of the rear side refractive surface of the eyeglass lens ML, and the tip of the feeler  102  is contacted to the rear side refractive surface of the eyeglass lens ML like a full line in  FIG. 20  at the position corresponding to the drilling processing position Pa (θa, ρa). 
   After attached (contacted) the feeler  102  to the rear side refractive surface of the eyeglass lens (lens to be processed) in such a way as mentioned above, the arithmetic control circuit  80  further controls the drive motor  253  in motion to carry out the displacement of the part corresponding to the drilling processing position Pa (θa, ρa) in the rear side refractive surface of the eyeglass lens ML by pressing with the feeler  102  toward the position indicated with the full line in  FIG. 20  by the amount of movement ΔZa. As a result, the part of the drilling processing position Pa (θa, ρa) in the front side refractive surface of the eyeglass lens ML is slanted by the angle β, and the drilling processing position Pa (θa, ρa) is moved to the drilling processing position Pa′ (θa, ρa′). 
   Accordingly, the normal line Q 2  in the drilling processing position Pa′ (θa, ρa′) of the front side refractive surface of the eyeglass lens ML becomes parallel to the axis Z and the drill  221 , that is to say, the tangent Q 1  in the drilling processing position Pa′ (θa, ρa′) and the axis of the drill  221  become in a condition that they can be in perpendicular. 
   (Main Clamping) 
   Next, after driving the measurement shaft  42   a  in the axis direction in such a manner as to separate the tip of the feeler  102  from the rear side refractive surface by a predetermined amount by controlling the drive motor  253  in motion, the arithmetic control circuit  80  rotates the measurement shaft  42   a  by controlling the drive motor  247  so as to rotate the measuring element  41  to the upraised stored position from the using position, and as a result, the feelers  101  and  102  of the measuring element  41  are removed from the both sides of the eyeglass lens ML. 
   In this state, the arithmetic control circuit  80  drives the lens rotating shaft  24  to the approaching direction of the lens rotating shaft  23  to slightly narrow the distance between the adjustable joint  301  and the lens retainer  320  by controlling the pulse motor  24   d  in motion, so that the pressing force of the lens retainer  320  to the rear side refractive surface of the eyeglass lens ML retained by the lens absorption board  302  of the adjustable joint  301  is strengthened, therefore the eyeglass lens ML is in the main clamped condition between the adjustable joint  301  and the lens retainer  320 . The clamping force at this time is presumed as 60 kg for example. 
   By clamping in such the way as described above, the hemispheric hole  303   a  and the hemispheric member  304 , and the hemispheric member  304  and the hemispheric member  305  are mutually engaged with the certain degree or more of the friction, so that the rotation of the hemispheric members  304  and  305  in the extending directions of the key grooves  303   b  and  304   b  can be avoided even when the force (force in direction of the rotation during the grinding processing or the grinding power by the chamfering stone during the grinding processing) exceeding the predetermined level is acted. Similarly, the hemispheric hole  323   a  and the hemispheric member  324  are mutually engaged with the certain degree or more of the friction, so that the rotation of the hemispheric member  324  can be avoided even when the force exceeding the predetermined level is acted. 
   (Drilling Process) 
   In the clamped condition as stated above, the arithmetic control circuit  80  rotates the lens rotating shafts  23  and  24  (more specifically, the eyeglass lens ML) in such a manner that the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML is positioned at the side of the drill  221  like shown in  FIG. 19  by controlling the lens rotating shaft drive motor  25  in motion. At this time, the lens rotating shafts  23   a  and  24  (that is, the eyeglass lens ML) are rotated so that the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML is corresponded to the tip of the drill  221  when the drill  221  is moved to the side of the eyeglass lens ML by the predetermined amount based on the radius vector ρa. 
   In addition, by normally rotating the drive motor  217 , the arithmetic control circuit  80  rotates the one end part of the swing arm  204  to the upper part to raise the tip of the drill  221  by a predetermined amount, and corresponds the tip of the drill  221  to the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML. At this position, the arithmetic control circuit  80  rotates and drives the drill  221  by actuating the drive motor  228 . 
   Subsequently, by actuating the base drive motor  14 , the arithmetic control circuit  80  drives the carriage  22  and the lens rotating shafts  23  and  24  to the axis Z direction of the lens rotating shafts  23  and  24  with the eyeglass lens ML, and moves the tip of the drill  221  toward the drilling processing position Pa′ (θa, ρa′) of the front side refractive surface of the eyeglass lens ML. With this movement, the drill  221  is adapted to be abutted to the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML, and the drilling process is performed. 
   When the drilling process is finished, the arithmetic control circuit  80  separates the drill  221  from the eyeglass lens ML by returning the carriage  22  and the eyeglass lens ML to an original state by reversing the base drive motor  14 . Subsequently, by reversing the drive motor  217 , the arithmetic control circuit  80  returns the swing arm  204  to its original state by rotating the one end part thereof to the lower part. 
   Later, the arithmetic control circuit  80  carries out the similar drilling control to the drilling processing position Pb (θb, ρb) of the eyeglass lens ML. 
   By the way, although the hole for fixing the point frame is set to be drilled from the front side refractive surface of the eyeglass lens ML in the embodiment described above, it is not necessarily limited to drill the hole from the front side refractive surface. For example, the hole for fixing the point frame may be drilled from the rear side refractive surface of the eyeglass lens ML. 
   Also, although the axis of the drill  221  and the tangent of the drilling position of the refractive surface of the eyeglass lens are set to be substantially in perpendicular, an angle between the axis of the drill  221  and the tangent of the drilling position of the refractive surface of the eyeglass lens ML may be set arbitrary. For example, the angle between the axis of the drill  221  and the tangent of the drilling position of the refractive surface of the eyeglass lens ML may be set in such a manner that the drilling can be carried out so that the hole for fixing the point frame becomes parallel to the lens edge. 
   [Embodiment 2 of the Present Invention] 
   [Constitution] 
   Although the eyeglass lens ML is slanted and adjusted by driving the measurement shaft  42   a  in such a manner as to be advanced and retracted in the axis direction with the measurement shaft advancing-retracting means  246  in the embodiment described above, the present invention is not necessarily limited by the above structure. For example, the structure may be set like an embodiment 2 of the present invention shown in  FIGS. 30 to 38 . Meanwhile, although the basic structure in the embodiment 2 of the present invention is same as the structure in the embodiment 1 and therefore its illustration is omitted, the description of the embodiment 2 of the present invention will be made by using the structure in the embodiment 1 of the present invention. By the way,  FIGS. 30 to 38  abbreviatedly show the structure in the  FIGS. 13A and 14  by omitting partial of the structure in  FIGS. 13A and 14 , therefore, the lens absorption device  300  and the lens retainer  320  in  FIGS. 30 to 38  actually have the structure shown in  FIGS. 13A and 14 . Accordingly, the detailed descriptions of the lens absorption device  300  and the lens retainer  320  will be made with reference to the structure in  FIGS. 13A and 14 , and at this time, the description of these figures are omitted. 
   In  FIG. 30 , the measuring element  41  is in the condition being prostrated to the using position. At the successively provided portion  100   a  of the measuring element  41  at the using position, an engaging concave portion  100   d  faces to the rear wall  11   c  which forms the processing chamber  4  in  FIGS. 3A and 4  is formed. Also, at the rear wall  11   c  in  FIGS. 3A and 4 , an engaging member (movement restricting member, locking member)  100   e  is retained which is capable of advancing and retracting to the engaging concave portion  100   d  of the measuring element  41  and is retained incapable of moving in the extending direction of the axis of the measurement shaft  42   a.    
   Furthermore, the engaging member  100   e  is set to engage with the engaging concave portion  100   d  of the measuring element  41  by a solenoid  100   f  as driving means. Meanwhile, means other than the solenoid can be used for the driving means. For example, by advancing and retracing a rack by a pinion driven by a motor, the engaging member  100   e  can be set to be moved in such a manner as to be advanced and retracted. 
   [Operation] 
   (Arrangement of the Eyeglass Lens to the Measuring Element  41 ) 
   In the structure described above, the arithmetic control circuit  80  controls the base drive motor  14  in motion to drive and control the carriage  22  so that the carriage  22  is advanced and retracted in the axis direction thereof by the screw shaft  15 , and the eyeglass lens ML is moved integrally with the lens rotating shafts  23  and  24  in its axis direction so that the eyeglass lens ML is corresponded to the center of the feelers  101  and  102  of the measuring element  41 . 
   Subsequently, the arithmetic control circuit  80  moves the lens rotating shafts  23  and  24  of the carriage  22  to the upper part along the guide slits  11   a   1  and  11   b   2  by raising the front end part of the carriage  22  by controlling the pulse motor  59  in motion, so as to move the eyeglass lens (lens to be processed) ML which is held between the lens rotating shafts  23  and  24  to the upper part in such a manner that the eyeglass lens ML draws the arc. 
   (Locking of the Measuring Element  41 ) 
   Then, the arithmetic control circuit  80  moves the measurement shaft  42   a  by controlling the drive motor  247  in motion so that the measuring element  41  is rotated from the stored position which the measuring element  41  is in upraised state to the using position which the measuring element  41  is horizontally prostrated, as a result, the feelers  101  and  102  of the measuring element  41  are faced toward the both sides of the eyeglass lens ML. 
   In this state, the arithmetic control circuit  80  advances the engaging member  100   e  toward the engaging concave portion  100   d  by controlling the solenoid  100   f  in motion. Accordingly, the engaging member  100   e  is engaged with the engaging concave portion  100   d  like shown in  FIG. 30A , and the measuring element  41  is adapted to be in the condition incapable of moving in the extending direction of the measurement shaft  42   a.    
   (Provisional Clamping of the Eyeglass Lens ML) 
   Next, the arithmetic control circuit  80  sets the eyeglass lens ML in the provisional clamped condition between the adjustable joint  301  and the lens retainer  320  by controlling the pulse motor  24   d  in motion to drive the lens rotating shaft  24  in the direction separating slightly from the lens rotating shaft  23  so that the distance between the adjustable joint  301  and the lens retainer  320  is widened, accordingly the pressing force of the lens retainer  320  to the rear side refractive surface of the eyeglass lens ML retained by the lens absorption board  302  of the adjustable joint  301  is loosened to 10 kg for example (by the way, this numerical value is one of the example, and the value may be set larger or oppositely, smaller, and the value can also be changed depending on the thickness of the eyeglass lens) like shown in  FIG. 29 , thereby the eyeglass lens ML is in the provisional clamped condition between the adjustable joint  301  and the lens retainer  320 . 
   At this time, when the eyeglass lens ML is pressed by the light force toward the extending directions of the lens rotating shafts  23  and  24 , the adjustable joints  301  and  321  are rotated, and the eyeglass lens ML becomes such condition being slanted in the pressed direction. 
   (Slanting and Adjusting) 
   Furthermore, by controlling the lens rotating shaft drive motor  25  in motion, the arithmetic control circuit  80  transmits the rotation of the power transmission shaft  25   a  to the lens rotating shaft  23  through the drive gear  26  and the driven gear  26   a  so that the lens rotating shaft  23  and the pulley  27  are integrally rotated and driven. The rotation of the pulley  27  is transmitted to the pulley  29  through the driving side belt  28   d , the transmission pulley  28   a , the transmission shaft  28   c , transmission pulley  28   b  and the driven side belt  28   e  so that the pulley  29  and the lens rotating shaft  24  are integrally rotated. At the time of this control, the arithmetic control circuit  80  sets the rotation angle θa of the lens rotating shafts  23  and  24  (that is, the eyeglass lens ML) and the tip of the feeler  102  to be correspond. 
   Moreover, the arithmetic control circuit  80  sets the tip of the feeler  102  to be correspond to the radius vector ρa in the drilling processing position Pa (θa, ρa) of the eyeglass lens ML retained between the lens rotating shafts  23  and  24  by controlling the pulse motor  59  in motion to elevate and lower the tip of the carriage  22  with the lens rotating shafts  23  and  24 . This drilling processing position Pa (θa, ρa) is, for example, the ear side. 
   In this state, the arithmetic control circuit  80  drives the carriage  22  and the lens rotating shafts  23  and  24  in the axis Z direction (direction indicated by an arrow Za 1  in  FIG. 30A ) with the eyeglass lens ML by actuating the base drive motor  14 , and carries out the displacement to the part corresponding to the drilling processing position Pa (θa, ρa) in the rear side refractive surface of the eyeglass lens ML by pressing with the feeler  102  like shown in  FIG. 30B  by the amount of movement ΔZa. Accordingly, the part of the drilling processing position Pa (θa, ρa) in the front side refractive surface of the eyeglass lens ML is slanted by the angle β, and the drilling processing position Pa (θa, ρa) is moved to the drilling processing position Pa′ (θa, ρa′). 
   As a result, the normal line Q 2  in the drilling processing position Pa′ (θa, ρa′) of the front side refractive surface of the eyeglass lens ML becomes parallel to the axis Z and the drill  221 , that is to say, the tangent Q 1  in the drilling processing position Pa′ (θa, ρa′) and the axis of the drill  221  become in the condition that they can be in perpendicular. 
   (Main Clamping) 
   Next, the arithmetic control circuit  80  drives the lens rotating shaft  24  to the approaching direction of the lens rotating shaft  23  to slightly narrow the distance between the adjustable joint  301  and the lens retainer  320  by controlling the pulse motor  24   d  in motion so that the pressing force of the lens retainer  320  to the rear side refractive surface of the eyeglass lens ML retained by the lens absorption board  302  of the adjustable joint  301  is strengthened, therefore the eyeglass lens ML is in the main clamped condition between the adjustable joint  301  and the lens retainer  320 . The clamping force at this time is presumed as 60 kg for example. 
   By clamping in such the way as described above, the hemispheric hole  303   a  and the hemispheric member  304 , and the hemispheric member  304  and the hemispheric member  305  are mutually engaged with the certain degree or more of the friction, so that the rotation of the hemispheric members  304  and  305  in the extending directions of the key grooves  303   b  and  304   b  can be avoided even when the force (force in direction of the rotation during the grinding processing or the grinding force by the chamfering stone during the grinding processing) exceeding the predetermined level is acted. Similarly, the hemispheric hole  323   a  and the hemispheric member  324  are mutually engaged with the certain degree or more of the friction, so that the rotation of the hemispheric member  324  can be avoided even when the force exceeding the predetermined level is acted. 
   (Measuring) 
   In the above mentioned state, by controlling the solenoid  100   f  in motion, the arithmetic control circuit  80  pulls out and removes the engaging member  100   e  from the engaging concave portion  100   d , and lifts the restriction of the movement of the measuring element  41  in the axis direction of the measurement shaft  42   a.    
   Next, the arithmetic control circuit  80  moves the lens rotating shafts  23  and  24  of the carriage  22  to the upper part along the guide slits  11   a   1  and  11   b   2  by raising the front end part of the carriage  22  by controlling the pulse motor  59  in motion, so as to move the eyeglass lens (lens to be processed) ML which is held between the lens rotating shafts  23  and  24  to the upper part in such a manner that the eyeglass lens ML draws the arc. Accordingly, the feeler  102  of the measuring element  41  is moved to the side of the center of the eyeglass lens ML along the rear side refractive surface of the eyeglass lens ML in such a manner that is indicated with an arrow Y 1  like in  FIG. 31 . At this time, in the rotation angle θa, changes in a transition-radius vector ρn (n=0, 1, 2, 3, . . . j) of moving positions by the feeler  102  toward the center of the eyeglass lens ML can be obtained by an amount of elevation and lowering of the lens rotating shafts  23  and  24  driven by the pulse motor  59 . 
   Also, when the feeler  102  of the measuring element  41  is moved to the side of the center of the eyeglass lens ML along the rear side refractive surface of the eyeglass lens ML, the measuring element  41  is moved in such a manner as to be advanced and retracted like shown by an arrow Za 2  in the axis direction of the measurement shaft  42   a  by the rear side refractive surface of the eyeglass lens ML. The moving positions of the measuring element  41  in the axis direction of the measurement shaft  42   a  is detected by the magnescale  244  as an axis direction-transition position Zn (n=0, 1, 2, 3 . . . j). 
   In addition, the arithmetic control circuit  80  stores the transition-radius vector ρa and the axis direction-transition position Zn in the data memory  82  as gradient information (ρn, Zn), and judges whether or not an amount of slanting and adjusting of the eyeglass lens ML is same as an amount of gradient obtained in advance from the gradient information (ρn, Zn). 
   When the arithmetic control circuit  80  judges from the gradient information (ρn, Zn) that the amount of slanting and adjusting of the eyeglass lens ML is same as the amount of gradient obtained in advance, the arithmetic control circuit  80  drives the measurement shaft  42   a  in the axis direction in such a manner that the tip of the feeler  102  is separated from the rear side refractive surface by a predetermined amount by controlling the drive motor  253  in motion. Then, the arithmetic control circuit  80  rotates the measurement shaft  42   a  by controlling the drive motor  247  in motion, and rotates the measuring element  41  from the using position to the upraised stored position so that the feelers  101  and  102  of the measuring element  41  are removed from the both sides of the eyeglass lens ML, thereby the condition becomes such that shown in  FIG. 32A . 
   When the arithmetic control circuit  80  judges from the gradient information (ρn, Zn) that the amount of slanting and adjusting of the eyeglass lens ML is not same as the amount of gradient obtained in advance, the arithmetic control circuit  80  carries out the above mentioned slanting and adjusting again until the amount of slanting and adjusting of the eyeglass lens ML becomes the amount of gradient obtained in advance from the gradient information (ρn, Zn). Then, as mentioned above, the arithmetic control circuit  80  removes the feelers  101  and  102  of the measuring element  41  from the both sides of the eyeglass lens ML, and the condition becomes such that shown in  FIG. 32A . 
   (Drilling Process) 
   In the above mentioned state, the arithmetic control circuit  80  rotates the lens rotating shafts  23  and  24  (more specifically, the eyeglass lens ML) in such a manner that the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML is positioned at the side of the drill  221  like shown in  FIG. 19  by controlling the lens rotating shaft drive motor  25  in motion. At this time, the lens rotating shafts  23  and  24  (that is, the eyeglass lens ML) are rotated so that the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML is corresponded to the tip of the drill  221  when the drill  221  is moved to the side of the eyeglass lens ML by the predetermined amount based on the radius vector ρa. 
   In addition, by normally rotating the drive motor  217 , the arithmetic control circuit  80  rotates the one end part of the swing arm  204  to the upper part to raise the tip of the drill  221  by the predetermined amount, and corresponds the tip of the drill  221  to the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML. At this position, the arithmetic control circuit  80  rotates and drives the drill  221  by actuating the drive motor  228 . 
   Subsequently, by actuating the base drive motor  14 , the arithmetic control circuit  80  drives the carriage  22  and the lens rotating shafts  23  and  24  to the axis Z direction (left direction) of the lens rotating shafts  23  and  24  with the eyeglass lens ML as shown by an arrow Za 3  in  FIG. 33 , and moves the tip of the drill  221  toward the drilling processing position Pa′ (θa, ρa′) of the front side refractive surface of the eyeglass lens ML. With this movement, the drill  221  is adapted to be abutted to the drilling processing position Pa′ (θa, ρa′) of the eyeglass lens ML like in  FIG. 34 , and the drilling process is performed. 
   When the drilling process is finished, the arithmetic control circuit  80  separates the drill  221  from the eyeglass lens ML by returning the carriage  22  and the eyeglass lens ML to an original state by displacing the carriage  22  and the eyeglass lens ML in the Z direction (right direction) shown by an arrow Za 4  in  FIG. 35A  by reversing the base drive motor  14 . Subsequently, by reversing the drive motor  217 , the arithmetic control circuit  80  returns the swing arm  204  to its original state by rotating the one end part thereof to the lower part. Accordingly, the fixing hole  400  is formed at the ear side of the eyeglass lens ML like in  FIGS. 35A and 35B . 
   Later, the arithmetic control circuit  80  carries out the similar drilling control to the drilling processing position Pb (θb, ρb) at the nose side in the eyeglass lens ML such as to the nose side. 
   More specifically, as shown in  FIG. 36A , the clamping force to the eyeglass lens ML by the lens rotating shafts  23  and  24  is set substantially 10 kg as the provisional clamping as similar to the above described, and the eyeglass lens ML is driven in the arrow Za 1  direction integrally with the lens rotating shafts  23  and  24 , and the rear side refractive surface of the eyeglass lens ML is pressed with the feeler  102  by the ΔZ, so that the eyeglass lens ML is slanted like in  FIG. 36B . 
   Subsequently, after the clamping force to the eyeglass lens ML by the lens rotating shafts  23  and  24  is set substantially 60 kg as the main clamping as similar to the above described, the curvature shape of the rear side refractive surface of the eyeglass lens ML is measured by the feeler  102  of the measuring element  41  so as to obtain the slant of the eyeglass lens ML, and when the amount of slanting and adjusting becomes the amount of gradient obtained in advance, the feelers  101  and  102  of the measuring element  41  are removed from the both sides of the eyeglass lens ML as described above. 
   Subsequently, the eyeglass lens ML is moved to the arrow Za 3  direction like in  FIG. 37  as similar to the above described so that the drilling is carried out into the drilling processing position Pb (θb, ρb) at the nose side in the eyeglass lens ML by the drill  221 , and then, by separating the drill  221  from the eyeglass lens ML as shown by the arrow Za 4  in  FIG. 38  in such a manner as described above, the fixing hole  401  is formed like in  FIG. 38B . 
   As described above, the lens grinding processing apparatus in the embodiment of the present invention has the lens rotating shafts  23  and  24  for holding the eyeglass lens ML capable of slanting, the drilling means (drilling processing device  200 ) for drilling the hole for the point frame (fixing hole for fixing the point frame) into the slanted eyeglass lens ML, and the grinding processing means (chamfering stones  224  and  225 ) for grinding processing the circumferential part of the lens for the point frame (rimless lens). 
   According to this structure, the drilling part of the refractive surface of the lens for the point frame can be set so as to be in substantially perpendicular to a main shaft of the tool when the tool such as the drill for the drilling is used for the drilling processing device  200  with a simple structure. Furthermore, by drilling the hole for the point frame in substantially perpendicular to the refractive surface of the lens for the point frame, the attachment for fixing can be fixed in a fine appearance. In this case, the drive motor for the tool such as the drill for the drilling can be shared with the drive motor for the grinding processing means (chamfering stones  224  and  225 ) for grinding and processing the circumferential part of the lens for the point frame (rimless lens) and with the drilling processing device  200 . 
   Also, the lens grinding processing apparatus in the embodiment of the present invention has the lens rotating shafts  23  and  24  for retaining the eyeglass lens, a lens shape measuring device B for measuring the shape of the eyeglass lens ML retained by the lens rotating shafts  23  and  24 , the arithmetic control means (arithmetic control circuit  80 ) for grinding and processing the eyeglass lens ML based on a result of measurement by the lens shape measuring device B, and the drilling means (drilling processing device  200 ) for drilling the hole for the point frame into the eyeglass lens ML. In addition, the lens grinding processing apparatus is used both as the lens grinding processing apparatus and the lens shape measuring device B as lens slanting means for slanting the eyeglass lens ML with the condition that the eyeglass lens ML is held between the lens rotating shafts  23  and  24 . Moreover, the arithmetic control means (arithmetic control circuit  80 ) of the lens grinding processing apparatus controls so as the hole for fixing the point frame is drilled into the slanted eyeglass lens ML by the drilling means (drilling processing device  200 ) by calculating the angle of gradient β of the refractive surface of the eyeglass lens ML from the result of measurement by the lens shape measuring device B, and slanting the drilling part (drilling processing positions Pa, Pb) of the refractive surface of the eyeglass lens ML to the lens rotating shafts  23  and  24  so as to be in the arbitrary angle (orthogonal in the present embodiment) to a drilling direction of the drilling means (drilling processing device  200 ) by using the lens shape measuring device B based on the angle of gradient β. 
   According to this structure, the drilling part of the refractive surface of the lens for the point frame (rimless lens) can be set so as to be in the arbitrary angle (substantially perpendicular in the present embodiment) to the main shaft of the tool when the tool such as the drill for the drilling is used for the drilling processing device  200  with simple structure. Furthermore, since the lens grinding processing apparatus is used both as the lens grinding processing apparatus and the lens shape measuring device B for measuring the lens thickness and the curvature shape of the refractive surface as the lens slanting means for slanting the eyeglass lens ML with the condition that the eyeglass lens ML is held between the lens rotating shafts  23  and  24 , it is not necessary to provide lens slanting means additionally, therefore, the structure becomes simple. Moreover, since the angle of gradient β of the eyeglass lens ML is obtained from the result of measurement by the lens shape measuring device, the angle of gradient β can be obtained accurately, as a result, the main shaft of the tool for the drilling can be set in perpendicular to the tangents in the drilling processing positions Pa, Pb when drilling the hole for fixing the point frame into the eyeglass lens ML. Accordingly, by drilling the hole for fixing the frame which is in substantially perpendicular into the refractive surface of the point frame lens (rimless lens), the attachment for fixing can be fixed in fine appearance. 
   In addition, in the lens grinding processing apparatus according to the embodiment of the present invention, each of the lens rotating shafts  23  and  24  has lens retaining portions (lens absorption device  300 , lens retainer  320 ) provided with the spheroid Joint or the spheroid connection (adjustable joint  301 ,  321 ). According to this structure, in the case of slanting the eyeglass lens ML so as to set the main shaft of the tool for the drilling in perpendicular to the tangent in the drilling position of the refractive surface of the eyeglass lens when drilling the hole for fixing the point frame, the eyeglass lens ML retained between the lens rotating shafts  28  and  24  can easily be slanted and adjusted with simple structure. 
   Because the present invention is structured as described above, it is possible to drill the hole for fixing the frame into the refractive surface of the point frame (rimless lens) in the arbitrary angle (including substantially perpendicular), therefore, the attachment for fixing can be fixed in fine appearance. 
   Also, the lens grinding processing device in the embodiment of the present invention is provided with the apparatus main body  3 , the pair of lens rotating shafts  23  and  24  rotatably provided in the apparatus main body capable of relatively approaching and separating adjustably on a same axis for holding the eyeglass lens ML, and a shaft rotating driving device (lens rotating shaft drive motor  25 ) for rotating and driving the pair of lens rotating shafts  23  and  24 . Also, this lens grinding processing apparatus has the lens retaining members ( 300 ,  320 ) filed to the opposed end sections of the pair of lens rotating shafts  23  and  24  respectively capable of slanting adjustably for slant-ably holding the eyeglass lens ML between the pair of lens rotating shafts  23  and  24 , and the drilling device (drilling processing device  200 ) for drilling the hole for the point frame into the eyeglass lens held between the lens retaining members. Furthermore, the lens grinding processing apparatus has the grinding stone (grinding stone  35  or chamfering stones  224 ,  225 ) rotatably provided capable of relatively approaching and separating to the lens rotating shafts  23  and  24 , a shaft-to-shaft distance variable device (shaft-to-shaft distance adjusting means  43  as the shaft-to-shaft distance adjusting mechanism) for changing a shaft-to-shaft distance between the lens rotating shafts  23  and  24  and the grinding stone (grinding stone  35  or chamfering stones  224 ,  225 ) by relatively approaching and separating the lens rotating shafts  28  and  24  and the grinding stone (grinding stone  35  or chamfering stones  224 ,  225 ), and the arithmetic control circuit  80  for adjusting the shaft-to-shaft distance between the lens rotating shafts  23  and  24  and the grinding stone (grinding stone  35  or chamfering stones  224 ,  225 ) by controlling the shaft rotating driving device (lens rotating shaft drive motor  25 ) and the shaft-to-shaft distance variable device (shaft-to-shaft distance adjusting means  43  as the shaft-to-shaft distance adjusting mechanism) in motion based on the lens shape information (θi, ρi). 
   According to this structure, the hole for fixing the frame which is in substantially perpendicular can be drilled into the refractive surface of the eyeglass lens ML by slanting and adjusting the eyeglass lens in the lens grinding processing apparatus, as a result, the attachment for fixing can be fixed with fine appearance. 
   Also, in the lens grinding processing apparatus of the embodiment of the present invention, each of the lens retaining members ( 300 ,  320 ) is provided with the spheroid joint or the spheroid connection ( 301 ,  321 ) for slant-ably retaining the eyeglass lens ML. According to this structure, the slanting and adjusting of the eyeglass lens ML held between the lens retaining members ( 300 ,  320 ) can be carried out with simple structure. 
   Also, in the lens grinding processing apparatus of the embodiment of the present invention, the spheroid joint or the spheroid connection ( 301 ,  321 ) is provided with a movable portion (hemispheric members  304 ,  305  and  324 ) which enables the eyeglass lens ML to be slanted and adjusted in a condition when the lens retaining members ( 300 ,  320 ) hold the eyeglass lens ML with the clamping force in a setting range smaller than a predetermined value, and maintains the eyeglass lens ML in the slanted state by being fixed by the friction in a condition when the lens retaining members ( 300 ,  320 ) hold the eyeglass lens ML  6  with the clamping force of over the predetermined value. 
   According to this structure, it is possible to set the eyeglass lens ML to be in the condition which the slanting and adjusting thereof to the lens rotating shafts  23  and  24  can be carried out, and to set the eyeglass lens ML to be in the condition which the eyeglass lens ML is fixed and does not slant to the lens rotating shafts  23  and  24 . 
   Also, in the lens grinding processing apparatus of the embodiment of the present invention, one ( 23 ) of the pair of lens rotating shafts  23  and  24  is provided rotatably and incapable of moving in the axis direction, and the other ( 24 ) of the pair of lens rotating shafts  23  and  24  is provided rotatably and capable of moving in the axis direction. In addition, aforementioned the other lens rotating shaft  24  is provided capable of moving and controlled in the axis direction by a shaft advancing and retracting drive device (feed screw mechanism SM). Also, the arithmetic control circuit  80  of the lens grinding processing apparatus controls aforementioned the other lens rotating shaft  24  so as to be advanced and retracted in the axis direction by controlling the shaft advancing and retracting drive device (feed screw mechanism SM) in motion, so that the apparatus is provided capable of adjusting the clamping force by the lens retaining members ( 300 ,  320 ) to the eyeglass lens ML. 
   According to such structure stated above, by adjusting the clamping force to the eyeglass lens ML by the lens retaining members ( 300 ,  320 ), it is possible to set the eyeglass lens ML to be in the condition which the slanting and adjusting thereof to the lens rotating shafts  23  and  24  can be carried out, and to set the eyeglass lens ML to be in the condition which the eyeglass lens ML is fixed and does not slant to the lens rotating shafts  23  and  24 . 
   Also, in the lens grinding processing apparatus of the embodiment of the present invention, the apparatus main body  3  is provided with a lens shape measuring device (lens thickness measuring system  18 ) for measuring the lens thickness which is along the lens shape of the eyeglass lens ML based on the lens shape information (θi, ρi). In addition, the arithmetic control circuit  80  of the lens grinding processing apparatus slants the eyeglass lens ML held between the lens retaining members ( 300 ,  320 ) by controlling the lens shape measuring device (lens thickness measuring system  18 ) in motion. According to this structure, because the slanting and adjusting of the eyeglass lens ML is carried out by utilizing the lens shape measuring device (lens thickness measuring system  18 ) provided in the lens grinding processing apparatus, it is not necessary to provide means for slanting and adjusting the eyeglass lens ML additionally. 
   Also, the arithmetic control circuit  80  in the lens grinding processing apparatus of the embodiment of the present invention carries out a control so that the hole for fixing the point frame is drilled into the slanted eyeglass lens ML by the drilling device (drilling processing device  200 ) by calculating the angle of gradient of the refractive surface of the eyeglass lens ML from the result of measurement by the lens shape measuring device (lens thickness measuring system  18 ), and slanting the eyeglass lens ML to the lens rotating shafts  23  and  24  by using the lens shape measuring device (lens thickness measuring system  18 ) so as to set the drilling part of the refractive surface of the eyeglass lens ML to be in a certain angel to the drilling device (drilling processing device  200 ) based on the angle of gradient. 
   According to this structure, the lens shape measuring device (lens thickness measuring system  18 ) can measure the lens thickness of the refractive surface of the eyeglass lens ML in the part along the shape of the lens based on the lens shape information (θi, ρi) and the curvature of the front side refractive surface and the rear side refractive surface of the eyeglass lens ML. In addition, since the arithmetic control circuit  80  is set to slant and adjust the eyeglass lens ML by controlling the lens shape measuring device (lens thickness measuring system  18 ) based on the result of above measurement, the eyeglass lens ML can be slanted and adjusted accurately so as to set the drilling tool of the drilling device (drilling processing device  200 ) to be in perpendicular to the drilling part. 
   Also, after slanting the eyeglass lens ML to the lens rotating shafts  23  and  24  by using the lens shape measuring device (lens thickness measuring system  18 ) with the condition of holding the eyeglass lens ML between the lens retaining members ( 300 ,  320 ) with the clamping force in the setting range smaller than the predetermined value by controlling the shaft advancing and retracting drive device (feed screw mechanism SM) in motion, the arithmetic control circuit  80  in the lens grinding processing apparatus of the embodiment of the present invention carries out the control so that the hole for fixing the point frame is drilled into the slanted eyeglass lens ML by the drilling device (drilling processing device  200 ) by holding the eyeglass lens ML between the lens retaining members ( 300 ,  320 ) with the clamping force of over the predetermined value by controlling the shaft advancing and retracting drive device (feed screw mechanism SM) in motion. 
   According to this structure, because the drilling process can be carried out to the eyeglass lens ML after slanting and controlling the eyeglass lens ML, it is possible to automate the drilling process to the eyeglass lens ML by the lens grinding processing apparatus. 
   Also, the drilling device (drilling processing device  200 ) in the lens grinding processing apparatus of the embodiment of the present invention has an arm (swing arm  204 ) retained by the apparatus main body  3  capable of approaching and separating to the lens rotating shafts  23  and  24 , and an arm driving device (swing driving means  205 ) for driving the arm (swing arm  204 ) to be approached and separated to the lens rotating shafts  23  and  24 . In addition, the drilling device (drilling processing device  200 ) has the drilling tool (drill  221  or the tools such as the end mill or the reamer) which extends in a same direction or in substantially a same direction to the extending directions of the lens rotating shafts  23  and  24  and is retained by the arm (swing arm  204 ) capable of rotating and driving, and a tool rotating driving device (processing device driving means  203 ) for rotating and driving the drilling tool (drill  221  or the tools such as the end mill or the reamer). Furthermore, the drilling device (drilling processing device  200 ) is provided with a relative moving device for relatively approaching and separating the drilling tool (drill  221  or the tools such as the end mill or the reamer) and the eyeglass lens ML retained between the lens retaining members ( 300 ,  320 ). 
   According to this structure, the drilling process can be carried out to the eyeglass lens ML with the drilling tool (drill  221  or the tools such as the end mill or the reamer) by facing the drilling tool (drill  221  or the tools such as the end mill or the reamer) to the eyeglass lens ML retained between the lens rotating shafts  23  and  24  with simple structure. 
   Also, the relative moving device in the lens grinding processing device of the embodiment of the present invention can be as a tool retaining device which retains the drilling tool (drill or the tools such as the end mill or the reamer) to the arm (swing arm  204 ) capable of advancing and retracting in an axis direction. For the tool retaining device, such a structure can be employed which the spindle  220  in  FIGS. 8 and 10  is rotatably retained by the arm (swing arm  204 ) capable of moving in an axis direction, and the spindle  220  is provided capable of driving by a hydraulic cylinder or a drive motor which are not shown, and the spindle  220  is provided capable of moving in the axis direction to the pulley  235  and incapable of relatively rotating. In addition, for the tool retaining device, the spindle  220  can be constituted by a hydraulic cylinder which is telescopic. 
   According to this structure, the drilling process to the eyeglass lens ML can be carried out with the tool retaining device provided to the arm (swing arm  204 ). 
   Also, the relative moving device in the lens grinding processing apparatus of the embodiment of the present invention has the carriage  22  which the pair of lens rotating shafts  23  and  24  are fixed and is capable of moving and driving in the extending directions of the lens rotating shafts  23  and  24 , and an axis direction driving device (base drive motor  14 ) which moves and drives the carriage  22  in the extending directions of the lens rotating shafts  23  and  24 . 
   According to this structure, the axis direction driving device (base drive motor  14 ) of the lens grinding processing apparatus can be used for driving the drilling tool (drill  221  or the tools such as the end mill or the reamer) and the eyeglass lens ML retained between the lens retaining members ( 300 ,  320 ) in such a manner as to relatively approach and separate. Therefore, it is needless to additionally provide a constitution for relatively approaching and separating the drilling tool (drill  221  or the tools such as the end mill or the reamer) and the eyeglass lens ML. 
   Also, the carriage  22  in the lens grinding processing apparatus of the embodiment of the present invention is provided capable of elevating and lowering by the shaft-to-shaft distance variable device (shaft-to-shaft distance adjusting means  43  as the shaft-to-shaft distance adjusting mechanism). 
   Also, in the lens grinding processing apparatus of the embodiment of the present invention, the chamfering stones  224 ,  225  or the grooving cutter  226  are rotatably retained by the arm (swing arm  204 ), and the chamfering stone  224  or the grooving cutter  226  is provided capable of rotating and driving by the tool rotating driving device (processing device driving means  203 ). 
   According to this structure, the chamfering stone  224  or the grooving cutter  226  or the like, and the drilling tool (drill  221  or the tools such as the end mill or the reamer) can be driven by the shared tool rotating driving device (processing device driving means  203 ). That is, since the tool rotating driving device (processing device driving means  203 ) of the chamfering stone  224  or the grooving cutter  226  that the lens grinding processing apparatus has can be shared for driving the drilling tool (drill  221  or the tools such as the end mill or the reamer), it is not required to provide driving means for driving the drilling tool (drill  221  or the tools such as the end mill or the reamer) additionally.