Patent Publication Number: US-2007113969-A1

Title: Optical disk laminating method and optical disk laminating device

Description:
FIELD OF THE INVENTION  
      The present invention relates to an optical disk laminating method and an optical disk laminating device, and in particular to an optical disk laminating method and an optical disk laminating device capable of shortening tact time.  
     BACKGROUND ART  
      In a manufacturing step of an optical disk such as a DVD-ROM, the work for laminating two sheets of disks to each other is required.  
      In the laminating work, conventionally, adhesive agent which is ultraviolet-ray cured resin is generally applied on at least a lower disk in a doughnut manner, an upper disk is moved to and placed on the lower disk, and adhesive agent between both the disks is spread uniformly by rotating both the disks at high speed.  
      The application and the spread of the adhesive agent are generally performed on a rotating stand consistently (see Patent Literature 1).  
      Specifically, such a process is performed that a lower disk is put on a rotating stand, the rotating stand is rotated at low speed, adhesive agent is applied from a dispenser in a doughnut manner, an upper disk is put on the lower disk, the rotating stand is then rotated at high speed, and adhesive agent between both the disks is spread.  
      However, when a stacking operation for the upper and lower disks is made excessively fast, such a problem arises that bubbles easily enter in the adhesive agent between both the disks.  
      Further, there is such a problem that some time period is required for removing bubbles from between the disks utilizing a centrifugal force by the spreading, and the time period is not can not be shortened easily.  
      Therefore, the stacking work is performed on the rotating stand consistently, which results in relative extension of tact time from transfer of the lower disk to the rotating stand to taking-out of both the disks through the termination of the application and spread of the adhesive agent.  
      Further, a laminating method where not only a lower disk but also an upper disk is applied with adhesive agent has been known (see Patent Literature 2). However, even if this method is used, such a problem can not be solved completely that bubbles easily enter in the adhesive agent between upper and lower disks like the above.  
      Similarly to the method described in Patent Literature  1 , there is such a problem that some spreading time period is required for removing bubbles which have entered in the adhesive agent and the time period can not be shortened easily.  
      In order to solve the above problem, there is also such a method that the number of rotating stands is increased so that rapidness of the tact time is achieved.  
      However, a board space must be secured for increasing the number of rotating stands so as to meet a demand for further shortening of the tact time, which goes against a demand for space saving.  
      The present inventors has already filed a patent application disclosing an optical disk laminating method constituted such that generation of bubbles in a gap between the upper disk and the lower disk can be suppressed as much as possible in a series of flows for manufacturing an optical disk (see Patent Literature 3).  
      The method satisfies a demand for shortening tact time and compactness of a device to some extent.  
       FIG. 12  shows an outline of the conventional optical disk laminating device,  FIG. 12 (A) being a plan view of the optical disk laminating device and  FIG. 12 (B) being a side view thereof along line A-B-C-D in  FIG. 12 (A).  
      In a method using the optical disk laminating device, an upper disk D 1  is moved and placed to a position a of a rotating table  100  by a transfer unit  101  and a lower disk D 2  is moved and placed to a position b by a transfer unit  102  from a stoker or a manufacturing line.  
      The rotating table  100  is intermittently rotated (in a counterclockwise direction in  FIG. 12 (A)) so that the upper disk D 1  at the position a is moved to a position c and the lower disk D 2  at the position b is moved to a position d, respectively.  
      After being applied with adhesive agent in a doughnut manner from a dispenser  103  at the position c, the upper disk D 1  is fed to a position e, where the disk D 1  is reversed by a revering unit  104 , and the upper disk D 1  is fed to a position  
      The lower disk D 2  is fed from the position b to a position f via the position d, it is applied from the dispenser  105  with adhesive agent in a doughnut manner, and it is fed to a position h.  
      Next, in this state, the upper disk D 1  at the position g is held by a suction chuck  200   b  (described in  FIG. 12 (B)) of an arm portion  200   a   1  of a transfer arm  200  to be lifted up from the position g and it is conveyed above the lower disk D 2  at the position h.  
      Then, the transfer arm  200  descends in a certain distance and an arm portion  200   a   2  holds the stacked disks D which has been subjected to spreading on a rotating stand  300 .  
      In this state, the lower disk D 2  placed at the position h is lifted up calmly by an ascending and descending unit  106  (described in  FIG. 12 (B)) and it is laminated to the upper disk D 1  held by the suction chuck  200   b.    
      Next, the transfer arm  200  is pivoted so that stacked disks D just laminated are conveyed from the position h to the rotating stand  300 .  
      Simultaneously, the stacked disks D which have been subjected to the spreading on the rotating stand  300  is conveyed to an ultraviolet irradiating table  400  by the arm portion  200   a   2 .  
      Simultaneously with pivoting of the transfer arm  200 , the rotating table  100  is intermittently rotated, so that the upper disk D 1  at the position e is moved to a position g and the lower disk D 2  at the position f is moved to the position h, respectively.  
      The arm portions  200   a   1  and  200   a   2  of the transfer arm  200  which have released the stacked disks D respectively pivots in a reverse direction (counterclockwise direction in  FIG. 12 (A)) and the arm portion  200   a   2  lifts up an upper disk D 1  from the position g to convey the same to the position h.  
      Simultaneously, the arm portion  200   a   1  holds stacked disks D which have been subjected to spreading on a rotating stand  301 .  
      Then, simultaneously with conveyance of the stacked disks D from the position h to the rotating stand  301  performed by the arm portion  200   a   2 , the arm portion  200   a   1  conveys the stacked disks D which have been subjected to spreading on the rotating stand  301  to an ultraviolet irradiating table  400 .  
      Like the optical disk laminating method, by separating the stacking work conventionally performed on the rotating stand consistently to the application of adhesive agent performed in a disk supplying step and the spreading of the adhesive agent performed on the rotating stand, the tact time can be shortened to some extent.  
      Patent Literature 1: JP-A-11-345433  
      Patent Literature 2: JP-A-2002-312983  
      Patent Literature 3: Japanese Patent Application No. 2003-330687  
     DESCRIPTION OF THE INVENTION  
      In the optical disk laminating method described in Patent Literature 3, however, such a case frequently occurs that, while one member is performing the work, the other member must stop its working to be put in a standby state or the like, and the work can not be efficiently performed necessarily, which can not be said to satisfy the demand for tact time shortening.  
      Further, since the angle between the arm portion  200   a   1  and the arm portion  200   a   2  is fixed, there is such a problem that only two rotating stands can be provided ordinarily.  
      For example, even if the number of the rotating stands to be provided is increased to four in order to shorten the tact time, since the behavior of the transfer arm  200  is further complicated, there is such a problem that it is impossible to shorten the tact time as expected in fact.  
      The present invention has been made in view of such a background, and it has been made for overcoming the problems in the above-described conventional art.  
      That is, an object of the present invention is to provide an optical disk laminating method and an optical disk laminating device which can shorten tact time.  
     MEANS FOR SOLVING THE PROBLEM  
      The invention described in claim  1  lies in an optical disk laminating method for laminating an upper disk and a lower disk via adhesive agent, comprising: a lower disk supplying step of conveying a lower disk above a rotating table by a lower disk supplying unit and placing the lower disk on a plurality of upper and lower disks placing jigs provided along a circumferential direction of a base plate placing portion on the rotating table; an upper disk supplying step of conveying an upper disk above the rotating table by an upper disk supplying unit and placing the upper disk on the upper and lower disks placing jigs on which the lower disk is placed so as to be spaced from the lower disk; an adhesive agent applying step for an upper disk of applying adhesive agent on the upper disk from the above in a state that the upper disk and the lower disk have been placed on the upper and lower disks placing jigs; an upper disk reversing step of reversing the upper disk applied with the adhesive agent; an adhesive agent applying step for a lower disk of applying adhesive agent to the lower disk after the upper disk reversing step; a disk stacking step of stacking the upper disk and the lower disk after the adhesive agent applying step for a lower disk; an adhesive agent spreading step of, after conveying the stacked disks manufactured in the disk stacking step to a rotating stand for spreading adhesive agent by a transfer arm, spreading the adhesive agent applied to the stacked disks on the rotating stand; and a light ray irradiating step of, after conveying the stacked disks where the adhesive agent has been spread on the rotating stand to a light ray irradiating table by the transfer arm, curing the adhesive agent.  
      The invention described in claim  2  lies in an optical disk laminating method for laminating an upper disk and a lower disk via adhesive agent, comprising: a lower disk supplying step of conveying a lower disk above a rotating table by a lower disk supplying unit and placing the lower disk on a plurality of upper and lower disks placing jigs provided along a circumferential direction of a base plate placing portion on the rotating table; an upper disk supplying step of conveying an upper disk above the rotating table by an upper disk supplying unit and placing the upper disk on the upper and lower disks placing jigs on which the lower disk is placed so as to be spaced from the lower disk; an adhesive agent applying step of, after a nozzle is inserted between the upper disk and the lower disk that have been placed on upper and lower disks placing jigs, applying adhesive agent from the nozzle on at least one of a lower face of the upper disk and an upper face of the lower disk; a disk stacking step of stacking the upper disk and the lower disk after the adhesive agent applying step; an adhesive agent spreading step of, after conveying the stacked disks manufactured in the disk stacking step to a rotating stand for spreading adhesive agent by a transfer arm, spreading the adhesive agent applied to the stacked disks on the rotating stand; and a light ray irradiating step of, after conveying the stacked disks where the adhesive agent has been spread on the rotating stand to a light ray irradiating table by the transfer arm, curing the adhesive agent.  
      The invention described in claim  3  is an optical disk laminating device comprising; a lower disk supplying unit for placing a lower disk on a rotating table; an upper disk supplying unit for placing an upper disk on the rotating table, which is provided on a downstream step side of the lower disk supplying unit; an adhesive agent applying unit for an upper disk which is provided on a downstream side of the upper disk supplying unit, for applying adhesive agent on the upper disk from the above; a reversing unit which is provided on a downstream step side of the adhesive agent applying unit for an upper disk, for reversing the upper disk applied with the adhesive agent; an adhesive agent applying unit for a lower disk which is provided on a downstream step side of the reversing unit, for applying adhesive agent to the lower disk from the above; a suction unit for lifting up the lower disk, while sucking the same, and laminating the lower disk with the upper disk; and a stacked disks transferring device which has a sucking portion which sucks and holds the upper disk when the upper disk and the lower disk are laminated, conveying the stacked disks from the rotating table to a rotating stand for spreading adhesive agent, and conveying the stacked disks where the adhesive agent has been spread on the rotating stand to a light ray irradiating table, wherein an upper and lower disks placing jigs on which the upper disk and the lower disk can be placed with a space in a vertical direction are provided around a disk placing portion on the. rotating table.  
      The invention described in claim  4  is an optical disk laminating device comprising; a lower disk supplying unit for placing a lower disk on a rotating table; an upper disk supplying unit which is provided on a downstream step side of the lower disk supplying unit, for placing an upper disk on the rotating table; an adhesive agent applying unit which is provided on a downstream step side of the upper disk supplying unit, for applying adhesive agent from the nozzle inserted between the upper disk and the lower disk on at least one of a lower face of the upper disk and an upper face of the lower disk; a suction unit for lifting up the lower disk while sucking the same and laminating the lower disk with the upper disk; and a stacked disks transferring device which has a suction portion for sucking and holding the upper disk when the upper disk and the lower disk are laminated to each other, conveying the stacked disks from the rotating table to a rotating stand for spreading adhesive agent, and conveying the stacked disks where the adhesive agent has been spread on the rotating stand to a light ray irradiating table, wherein an upper and lower disks placing jigs on which the upper disk and the lower disk can be placed with a space in a vertical direction are provided around a disk placing portion on the rotating table.  
      The invention described in claim  5  lies in such a constitution of the optical disk laminating device according to claim  3  or claim  4  that the upper and lower disks placing jig comprises an upper disk placing portion and a lower disk placing portion, and the upper disk placing portion is movable between a position where the lower disk can be inserted up to the lower disk placing portion and a position where the lower disk is placed.  
      Incidentally, any constitution obtained by combining the above claims properly can be adopted as long as it satisfies the object of the present invention.  
     EFFECT OF THE INVENTION  
      According to the present invention, an upper disk is placed on an upper and lower disks placing jig with a space after a lower disk is placed on the upper and lower disks placing jig.  
      Therefore, since it is not necessary to place an upper disk and a lower disk at different positions on the rotating table like the conventional art, the steps of performing stacking of an upper disk and a lower disk can be reduced, so that shortening of tact time can be achieved.  
      By inserting a nozzle for applying adhesive agent between the upper disk and the lower disk and applying adhesive agent on at least one of the upper disk and the lower disk without reversing the upper and lower disks, steps in disks stacking can be reduced to a great extent, so that tact time can be greatly shortened.  
     BEST MODE FOR CARRYING-OUT OF THE INVENTION  
      Best mode for carrying out the present invention will be explained below with reference to the drawings.  
     FIRST EMBODIMENT  
       FIG. 1  shows an optical disk laminating device according to a first embodiment of the present invention.  
      In the optical disk laminating device according to the first embodiment, an upper disk D 1  and a lower disk D 2  are supplied on a rotating table  1  from a stocking device or an upstream process line, where such steps as applying of adhesive agent, reversing of the upper disk D 1 , and stacking of both the disks D 1  and D 2  are sequentially performed.  
      The upper disk D 1  and the lower disk D 2  stacked with each other are spread with adhesive agent by rotating stands  33 A and  33 B, and the stacked disks are then transferred to an ultraviolet irradiating table  34  to be irradiated with ultraviolet for curing the adhesive agent.  
      The laminating method will be explained below with reference to a flowchart shown in  FIG. 2  in the order of steps.  
      First, in step S 11 , as shown in  FIG. 1 , the lower disk D 2  is supplied from a stocking device or a manufacturing line to a position a on the rotating table  1  by a transfer arm  2  which is a lower disk supplying unit.  
      Here, operation of ancillary equipment performed when the lower disk D 2  is supplied to the position a will be explained with reference to  FIG. 3 .  
      Chucks  3  which are upper and lower disks placing jigs are respectively provided at three portions around a portion on which the lower disk D 2  is placed at intervals of an angle of 120° about the central axis of the portion.  
       FIG. 3  shows a state of the chucks  3  just before they are opened.  
      A chuck holding device  4  which can ascend and descend is provided at a lower end side of the chucks  3 .  
      The chuck holding device  4  comprises a cylindrical cylinder portion  5  and a three-direction cam arm  6  for holding the chucks  3 .  
      Ω-shaped notched portions la are formed at positions where a disk is placed on the rotating table  1  such that a suction unit  21  described later is capable of passing through each Ω-shaped notched portion  1   a.    
      Opening and closing operations of each chuck  3  will be explained below with reference to  FIG. 4 .  
      As shown in  FIG. 4 (A), the chuck  3  has a lower disk placing portion  7  which is placed on the rotating table and an upper disk placing portion  9  which is connected to the lower disk placing portion  7  via a pivoting shaft  8 .  
      A spring  10  is compressed and interposed between the upper disk placing portion  9  and the lower disk placing portion  7  at a lower side of the pivoting shaft  8 .  
      The upper disk placing portion  9  is a rod-like member, and its upper end is bent in an L shape on which the upper disk D 1  can be placed, so that the upper disk D is placed on a distal end of the bent portion  9   a.    
      On the other hand, a lower end of the upper disk placing portion  9  is also bent in an L shape, and a roller  11  (so called “follower”) is attached to a distal end of the bent portion  9   b.    
      The three-direction cam arm  6  is disposed below the rotating table  1 , and the three-direction cam arm  6  ascends when the lower disk D 2  is supplied to the position a.  
      When the three-direction cam arm  6  ascends and a taper portion  6   a  of the three-direction cam arm  6  abuts on the roller  11 , such a state as shown in  FIG. 4 (B) is obtained.  
      When the three-direction cam arm  6  ascends higher, the roller  11  rotates in a clockwise direction and it runs on an upper surface of the taper portion  6   a , as shown in  FIG. 4 (C).  
      Since the bent portion  9   a  of the upper disk placing portion  9  pivots about the pivoting shaft  8  to be opened outwardly, the lower disk D 2  descends with no obstruction to be placed on the lower disk placing portion  7 .  
      Next, the rotating table  1  is intermittently rotated, so that the control proceeds to step S 12 .  
      In step S 12 , the upper disk D 1  is supplied to a position b above the lower disk D 2  with a predetermined space by a transfer arm  12  which is an upper disk supplying unit.  
      At that time, the upper disk D 1  is placed on the bent portions  9   a  described in  FIG. 3 .  
      Next, the rotating table  1  is intermittently rotated, so that the control proceeds to step S 13 .  
      In step S 13 , ultraviolet cure adhesive agent is applied to the upper disk D 1  by a dispenser  13  which is an adhesive agent applying unit for an upper disk at a position c.  
      Then, the rotating table  1  is intermittently rotated, so that the control proceeds to step S 14 .  
      In step S 14 , the upper disk D 1  applied with the adhesive agent is reversed by a reversing unit  14  at a position d Here, operation performed when the upper disk D 1  is reversed will be explained with reference to  FIG. 5  and  FIG. 6 .  
       FIG. 5 (A) shows such a state that the upper disk D 1  is held by the reversing unit  14 , which is viewed from above.  
      The reversing unit  14  includes a pair of thin plate-like arc shape clamp portions  15 , and claw portions  15   a  are respectively provided at two portions of each respective clamp portion  15 .  
       FIG. 5 (B) is a sectional view of the reversing unit taken along line A-B-C in  FIG. 5 (A).  
      As shown in  FIG. 5 (B), the upper disk D 1  is clamped in a trapezoidal groove defined by the respective claw portions  15   a  to be held.  
       FIG. 6  shows such a state that the upper disk D 1  has been lifted up from the chucks  3  while being clamped by the claw portions  15   a  of the clamp portions  15 .  
      A base portion  16  of the reversing unit  14  is fixed to a base stand (not shown) via an L-shaped metal part  17  by bolts.  
      A moving plate  18  which can be ascended and descended by a vertical moving unit (not shown) is provided on a side face of the base portion  16 , and a cylindrical rotational portion  19  is attached to an upper end of the moving platel 8 .  
      The plate-like clamp portions  15  are reversed according to rotating of the rotational portion  19  by an angle of 180°, so that the upper disk D 1  is also reversed.  
      As a result, the surface of the upper disk D 1  applied with the adhesive agent positions to face downward.  
      Then, the moving plate  18  is descended and the upper disk D 1  is placed on the upper disk placing portions  9  of the chucks  3  again.  
      Then, the rotating table  1  is intermittently rotated, so that the control proceeds to step S 15 .  
      In step S 15 , ultraviolet cure adhesive agent is applied to the lower disk D 2  by a dispenser  20  which is an adhesive agent applying unit for a lower disk at a position e.  
      Then, the rotating table  1  is intermittently rotated, so that the control proceeds to step S 16 .  
      In step S 16 , the lower disk D 2  is lifted up, the upper disk D 1  and the lower disk D 2  are stacked with each other at a position f.  
      Here, operation performed when the upper disk D 1  and the lower disk D 2  are stacked with each other will be explained with reference to  FIG. 7  and  FIG. 8 .  
      As shown in  FIG. 7 , a chuck holding device  22  having a suction unit  21  having a disk-shaped member on which a plurality of ventilation holes are formed is provided below the rotating table  1  so as to be capable of ascending and descending.  
      A three-direction cam arm  23  for opening and closing the chucks  3  erectly is provided on the chuck holding device  22 .  
      On the other hand, the upper disk D 1  is sucked with vacuum by a suction portion  25  attached to a distal end of a transfer arm  24 .  
       FIG. 8  shows a state that the chuck holding device  22  has ascended.  
       FIG. 8 (A) shows a state that the taper portion  23   b  formed on an erected portion  23   a  of the three-direction cam arm  23  has abutted on the roller  11  so that the upper disk placing portion  9  has pivoted.  
      At that time, though the upper disk D 1  is spaced from the upper disk placing portion  9 , the upper disk D 1  is staying in the air while being holding by the suction portion  25 .  
      On the other hand, the lower disk D 2  is out of contact with the suction unit  21 , and it is put in a state that it has been placed on the lower disk placing portion  7 .  
      Next, when the chuck holding device  22  is further ascended, such a state as shown in  FIG. 8 (B) is obtained.  
      At that time, a distal end of the erected portion  23   a  of the three-direction cam arm  23  is projected above a through hole  1   b  formed on the rotating table  1 .  
      The lower disk D 2  is placed on the suction unit while being sucked by the suction unit  21 , and it is put in a state that the lower disk D 2  together with the suction unit  21  is close to the upper disk D 1 .  
      When the lower disk D 2  is further ascended, adhesive agents  26  of both the disks D 1  and D 2  come in contact with each other, so that the upper disk Dl and the lower disk D 2  come in close contact with each other.  
       FIG. 9  shows details of the suction portion  25  described in  FIG. 8 .  
      The suction portion  25  has a pickup head  27  which is constituted so as to be capable of sucking and holding the upper disk D 1 .  
      The pickup head  27  sucks and holds the upper disk D 1  while the surface of the upper disk D 1  applied with the adhesive agent faces downward.  
      The pickup head  27  is attached to the transfer arm  24 , so that the pick up head  27  together with the transfer arm  24  can be ascended and descended.  
      A plurality of pads  28  are provided at intervals on a lower face of the pickup head  27  along a circumferential direction viewed from above.  
      The upper disk D 1  is sucked using negative pressure via a vacuum path  29  and is held by the pads  28 .  
      The pickup head  27  is formed with a supporting face  27   a  coming in contact with a central region of the upper disk D 1  in a planar manner, so that the central region of the upper disk D 1  can be positioned and held in a planar manner by the supporting face  27   a  of the pick up head  27 .  
      Since the central region of the upper disk D 1  is thus supported in a planar manner, the upper disk itself is made flat as a whole.  
      In the central portion of the pickup head  27 , chuck claws  30  engaging an inner peripheral edge of the center hole of the upper disk D 1  is suspended, the chuck claws  30  are opened and closed by the driving portion  31 .  
      Both the disks D 1  and D 2  are temporally caught by opening of the chuck claw  30 .  
      Then, the control proceeds to step S 17 .  
      In step S 17 , as shown in  FIG. 1 , the stacked disks D are conveyed from the position f on the rotating table  1  to the rotating stand  33 A or the rotating stand  33 B by the transfer arm  24  provided on the stacked disks transferring device  32 .  
      The stacked disks D conveyed to the rotating stand  33 A or  33 B are rotated at high speed, so that the adhesive agent between the upper disk D 1  and the lower disk D 2  is spread.  
      Then, the control proceeds to step S 18 .  
      In step S 18 , the stacked disks D rotated at high speed on the rotating stand  33 A or the rotating stand  33 B are conveyed to the ultraviolet irradiating table  34  by the transfer arm  24  provided on the stacked disks transferring device  32 .  
      Ultraviolet is irradiated to the stacked disks D placed on the ultraviolet irradiating table, so that the adhesive agent is cured, and lamination of both the disks D 1  and D 2  is terminated.  
      In the optical disk laminating device according to the first embodiment described above, after the lower disk D 2  is placed on the chucks  3 , the upper disk D 1  is placed on the chucks  3  with a space between the upper disk D 1  and the lower disk D 2 .  
      Therefore, since it is not necessary to place the upper disk D 1  and the lower disk D 2  at different positions on the rotating table like the conventional art, the steps for performing stacking of disks can be reduced, so that shortening of tact time can be achieved.  
      Eight sheets of disks are placed on the conventional rotating table  100 , but, only six sheets of disks are placed on the rotating table  1  in the first embodiment. Therefore, the size of the rotating table  1  can be reduced, so that space saving for device installation space can be achieved.  
     SECOND EMBODIMENT  
       FIG. 10  shows an optical disk laminating device according to a second embodiment of the present invention.  
      In the optical disk laminating device according to the second embodiment, an upper disk D 1  and a lower disk D 2  are supplied on a rotating table  1 A from a stocking device or an upstream process line, and such steps as applying of adhesive agent and stacking of both the disks D 1  and D 2  are sequentially performed on the rotating table.  
      The upper disk D 1  and the lower disk D 2  stacked with each other are spread with adhesive agent by a rotating stand  33 A or  33 B, and the stacked disks are then transferred to an ultraviolet irradiating table  34  to be irradiated with ultraviolet for curing the adhesive agent.  
      An optical disk laminating method will be explained below with reference to a flowchart shown in  FIG. 11  in the order of steps.  
      In step S 21 , as shown in  FIG. 10 , a lower disk D 2  is first supplied from the stocking device or a manufacturing line to a position a on the rotating table  1 A by the transfer arm  2 .  
      Then, the rotating table  1 A is intermittently rotated so that the control proceeds to step S 22 .  
      In step S 22 , as shown in  FIG. 10 , an upper disk D 1  is supplied to a position b above the lower disk D 2  with a predetermined space by a transfer arm  12 .  
      At that time, the upper disk D 1  is placed on the bent portions  9   a  of the upper disk placing portion  9  described in  FIG. 3 .  
      Next, the rotating table  1 A is intermittently rotated so that the control proceeds to step S 23 .  
      In step S 23 , as shown in  FIG. 10 , a nozzle of a dispenser  13  is inserted between the upper disk D 1  and the lower disk D 2  at a position c, and adhesive agent is applied to the lower disk D 2 .  
      At that time, it is better to apply adhesive agent to the upper disk D 1 , but, when a space between the upper disk D 1  and the lower disk D 2  is small, it is actually difficult to apply adhesive agent to both the faces of the upper disk D 1  and the lower disk D 2 . In such a case, therefore, it is prefer to apply adhesive agent to only the lower disk D 2 .  
      Then, the rotating table  1 A is intermittently rotated so that the control proceeds to step S 24 .  
      In step S 24 , at a position d shown in  FIG. 10 , the lower disk D 2  is lifted up by the same method as shown in  FIG. 8  described above, and the upper disk D 1  and the lower disk D 2  are stacked with each other.  
      Then, the control proceeds to step S 25 .  
      In step S 25 , as shown in  FIG. 10 , the stacked disks D are conveyed from the position d on the rotating table  1 A to the rotating stand  33 A or the rotating stand  33 B by the transfer arm  24  provided on the stacked disks transferring device  32 .  
      The stacked disks D conveyed to the rotating stand  33 A or  33 B are rotated at high speed, so that the adhesive agent between the upper disk D 1  and the lower disk D 2  is spread.  
      Then, the control proceeds to step S 26 .  
      In step S 26 , the stacked disks D rotated at high speed on the rotating stand  33 A or the rotating stand  33 B are conveyed to the ultraviolet irradiating table  34  by the transfer arm  24  provided on the stacked disks transferring device  32 . Ultraviolet is irradiated to the stacked disks D placed on the ultraviolet irradiating table, so that the adhesive agent is cured and lamination of both the disks D 1  and D 2  is terminated.  
      In the optical disk laminating device according to the second embodiment described above, by inserting the nozzle for applying adhesive agent between the upper disk D 1  and the lower disk D 2  and applying adhesive agent on at least one of the upper disk D 1  and the lower disk D 2  without reversing the upper and lower disks, steps of disks stacking can be reduced to a great extent, so that tact time can be greatly shortened.  
      Eight sheets of disks are placed on the conventional rotating table  100 , but only four sheets of disks are placed on the rotating table  1 A in the second embodiment. Therefore, the size of the rotating table  1  can be reduced, so that space saving for device installation space can be achieved.  
      The present invention has been explained above, but the present invention is not limited to only the first and second embodiments described above, and various changes can be performed without departing from the gist of the present invention.  
      For example, in the first embodiment described above, the example that adhesive agent is applied to the upper disk D 1  and the lower disk D 2  respectively has been explained, but it is possible to apply adhesive agent only to one disk, for example, only to the lower disk D 2 .  
      As the upper and lower disks placing jig, the chuck  3  having the upper disk placing portion  9  and the lower disk placing portion  7  has been explained as an example, but the upper and lower disks placing jig of the present invention is not limited to the example.  
      For example, the upper and lower disks placing jig can be constituted from one member.  
      This is because, when the upper and lower disks placing jig is rotated, the upper disk placing portion positioned at the upper end side of the upper and lower disks placing jig pivots more largely than the lower disk placing portion thereof.  
     INDUSTRIAL APPLICABILITY  
      The present invention relates to an optical disk laminating method and an optical disk laminating device, but the present invention can be applied to a disk-shaped recording medium, of course, so that tact time can be reduced in the whole method and device. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is an explanatory view showing a first embodiment of an optical disk laminating device of the present invention.  
       FIG. 2  is an explanatory view showing a processing flow in the optical disk laminating device in  FIG. 1 .  
       FIG. 3  is an explanatory view showing a state that a lower disk is supplied at a position a in  FIG. 1 .  
       FIG. 4  is an explanatory view showing details of a chuck in  FIG. 3 .  FIG. 4 (A) shows a state that a three-direction cam arm approaches to the chuck.  FIG. 4 (B) shows a moment at which the three-direction cam arm abuts on a roller provided on the chuck.  FIG. 4 (C) shows a state that an upper disk placing portion is opened by the three-direction cam arm.  
       FIG. 5  shows a state that an upper disk placed on the upper disk placing portion is clamped by clamp portions.  FIG. 5 (A) is a plan view and  FIG. 5 (B) is a sectional view taken along line A-B-C in  FIG. 5 (A).  
       FIG. 6  shows a state that the upper disk is reversed while being clamped by the clamp portions.  
       FIG. 7  is an explanatory view showing a state that the upper disk and the lower disk are stacked with each other.  
       FIG. 8  is an explanatory view showing operations of peripheral devices when the upper disk and the lower disk are stacked with each other.  FIG. 8 (A) shows a state before a suction unit abuts on the lower disk.  FIG. 8 (B) shows a state that the lower disk is close to the upper disk while being held by the suction unit.  
       FIG. 9  is an explanatory view showing details of a suction portion in  FIG. 8 .  
       FIG. 10  is an explanatory view showing a second embodiment of the optical disk laminating device of the present invention.  
       FIG. 11  is an explanatory view showing a processing flow in the optical disk laminating device in  FIG. 10 .  
       FIG. 12  is an explanatory view showing a conventional optical disk laminating device.  FIG. 12 (A) is a plan view and  FIG. 12 (B) is a sectional view taken along line A-B-C-D in  FIG. 12 (A). 
    
    
     EXPLANATION OF REFERENCE NUMERALS  
     
         
           1 ,  1 A: rotating table  
           1   a : notched portion  
           1   b : through hole  
           2 : transfer arm  
           3 : chuck  
           4 : chuck holding device  
           5 : cylinder portion  
           6 : three-direction cam arm  
           6   a : taper portion  
           7 : lower disk placing portion  
           8 : pivoting shaft  
           9 : upper disk placing portion  
           9   a ,  9   b : bent portion  
           10 : spring  
           11 : roller  
           12 : transfer arm  
           13 : dispenser  
           14 : reversing unit  
           15 : clamp portion  
           15   a : claw portion  
           16 : base portion  
           17 : L-shape metal part  
           18 : moving plate  
           19 : rotational portion  
           20 : dispenser  
           21 : suction unit  
           22 : chuck holding device  
           23 : three-direction cam arm  
           23   a : erected portion  
           23   b : taper portion  
           24 : transfer arm  
           25 : suction portion  
           26 : adhesive agent  
           27 : pickup head  
           27   a : support face  
           28 : pad  
           29 : vacuum path  
           30 : chuck claw  
           31 : driving portion  
           32 : stacked disks transferring device  
           33 A,  33 B: rotating stand  
           34 : ultraviolet irradiating table  
           100 : rotating table  
           101 ,  102 : transferring unit  
           103 ,  105 : dispenser  
           104 : reversing unit  
           106 : ascending and descending unit  
           200 : transfer arm  
           200   a   1 ,  200   a   2 : arm portion  
           200   b : suction chuck  
           300 ,  301 : rotating stand  
           400 : ultraviolet irradiating table  
          D: stacked disks  
          D 1 : upper disk  
          D 2 : lower disk  
          a to  1 : position