Patent Publication Number: US-2007101847-A1

Title: Paper perforator mechanism

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a paper perforator mechanism wherein a paper processing main device is provided on a base, and particularly to a paper perforator mechanism wherein a paper processing main device itself involves performances of a paper cutting, a perforation, stapling, etc.  
      2. Description of the Related Art  
      In a conventional paper perforator, in case that a plural number of papers are cut, perforated or stapled, the papers need to be arranged at first relative to a main device. Regarding how to arrange the papers relative to the main device, there are several examples such as: abutting the end of the papers (at the side the papers are inserted) to a dead-end portion provided within the main device; setting the end of the papers (opposite to the inserted side) at a scale provided on a base, etc.  
      A punched apparatus of a patent reference  1  (Japanese Patent Application Laid-open No. H10-15899), for example, discloses the apparatus, in which the end of papers (at the side the papers are inserted) abuts to a dead-end portion provided within a main device that perforates the papers. On the other hand, a paper cutter of a patent reference 2 (Japanese Patent Application Laid-open No. H11-333788) discloses the cutter, which sets the end of papers (opposite to the side that the papers are inserted) to a scale provided on a base.  
      Here, a number of paper processed may be singular or may be plural. Through this specification “the papers” means at least one piece of paper.  
       FIG. 24  shows a conventional punched apparatus  60  disclosed in the patent reference 1, in a partial sectional view. A base  65  of the punched apparatus  60  is provided with a die  67  with a hole as a cutting edge, and a bracket  66  standing upright therefrom.  
      Between the die  67  and a guide  68  fixed thereto, a clearance  70  is formed so that the papers are insertable thereinto for perforation. In the clearance  70  the dead-end portion  71  is formed. The maximum thickness of the papers to be inserted would be restricted according to the space of the clearance  70 , and the position in which the papers are processed (such as cutting, perforation, etc.) would be dependent on where the dead-end portion  71  is provided.  
      A punching blade  61  is movable only in a vertical direction due to the guide  68 . The punching blade  61  can be pressed down according to a descent of a presser  63 . The papers inserted into the clearance  70  can be perforated by a shearing force created between the cutting edge of the punching blade  61  and the die  67 . Paper waste produced through the perforated procedure is dischargeable into a waste receiver  73  placed beneath the die  67 , by passing through a hole of the die  67 .  
       FIG. 25  shows a conventional paper cutter (perspective view) disclosed in the patent reference 2. In a paper cutter  80 , a cutting device  81  is placed on a plate-like and rectangular base  82 . The cutting device  81  is composed of a rail  83  provided going along one long side of the base  82 , and a slider  86  with a rotary knife, which slides along the rail  83 .  
      Further, on the base  82  two pieces of guiding rulers  87 , which are perpendicular to the rail  83 , are placed, running parallel with each other. A paper adjuster  88  is laid across the guiding rulers  87 ; the paper adjuster  88  is movable along the guiding rulers  87 .  
      In paper cutting procedures, the position of the paper adjuster  88  is adjusted according to the size of the papers; the paper adjuster  88  restricts the back end of the papers. After the papers are restricted, the paper adjuster  88  is fixed to the guiding rulers  87 . One side of the rail  83  is pivotally supported by a holder  90 . By rotating the other side of the rail  83  upward, a clearance is made between the rail  83  and base  82 , so that the papers can be inserted thereinto. The back end of the papers placed over the base  82  abuts to the paper adjuster  88 , positioning the papers.  
      In a condition that the rail  83  is tilted, an engaging claw  85  at the tip of the rail  83  engages with an engaging portion  84  provided on the base  82 . The papers are thus fixed between the upper surface of the base  82  and a paper presser  89  provided beneath the rail  83 . The slider  86  is then moved along the rail  83 ; the papers are cut with a rotary knife held within the slider  86 .  
      According to the punched apparatus  60  of the patent reference 1, the dead-end portion  71  is formed within the punched apparatus  60 , thereby inhibits the user from visually positioning the papers, often causing the misplacement of the papers. Further, if paper wastes accidentally enter the dead-end portion  71 , the number of papers to be inserted may be limited. Misplacement or slanting of the papers may also happen.  
      On the other hand, according to the paper cutter  80  of the patent reference 2, the papers are positioned at the end thereof. Here, although the front end of the papers is subject to the cutting procedure, the accurate positioning of the papers would be hampered especially when the user needs to deal with the papers in different standard sizes.  
      Accordingly, before the papers are placed on the base  82 , the front end of the papers, which is subject to the paper cutting, etc., should be arranged; however, it is, as said, difficult to place the papers on the base  82  while keeping the arrangement if dealt with the different standard sizes. The front end of the papers is usually dislocated when placed on the base  82 .  
     SUMMARY OF THE INVENTION  
      The present invention has been made in light of the above problem, and it is an object of the present invention to provide a paper perforator mechanism, allowing the user to visually arrange papers on a base, regardless of paper standard sizes, and to maintain its arrangement until the papers are ready for perforation at a paper processing main device.  
      In order to achieve the object described above, according to a first aspect of the present invention, there is provided a paper perforator mechanism which includes: a base; a paper processing main device working for cutting, perforating or stapling to papers, wherein the paper processing main device is placed on the base; a paper adjuster projectable from the upper surface of the base, wherein the end of the papers, where facing to the paper processing main device, is abutted to the paper adjuster; a slide plate slidable on the base; a paper presser provided on the slide plate and pressable to the papers placed on the side plate; a first positioning means setting an initial position of the slide plate on the base relative to the paper adjuster; a depressing means depressing the paper adjuster to contain within the base; a sliding means moving the slide plate, on which the papers are fixed, toward the paper processing main device; a second positioning means setting the position of the slide plate on the base in a condition that the papers are ready for being processed.  
      With these structures, the user can visually position the end of the papers facing the paper processing main device (hereinafter refer to as insertion side of the papers) by abutting to the paper adjuster. The positioned papers can be fixed on the slide plate, the position of which is restricted by the first positioning means relative to the paper adjuster. By sliding the slide plate to the position restricted by the second positioning means, the papers fixed on the slide plate can be precisely located at the paper processing main device where paper perforations are performed. This means that the distance between the end of the insertion side of the papers and a processing position (the exact position in which perforations, etc. are performed) can be determined at precise.  
      Further, when the papers are moved to a given position where appropriate for perforations, etc., the slide plate is made to be stopped by the second position means, contributing to perforations, etc. at a precise position. Still further, the papers arranged by the user can be firmly fixed on the slide plate positioned in the initial position, and the slide plate is then moved to the position where perforations, etc. are performed. Accordingly, the user can keep the arrangement of the papers until the papers are processed.  
      In the first aspect of the present invention, the first positioning means may include: a position controlling means fixng the slide plate in the initial position; and a releasing means releasing the slide plate from the initial position. The present invention can thus position the slide plate in the initial position easily and precisely, and can release the slide plate from the initial position without any hampers.  
      In the first aspect of the present invention, the position controlling means may be provided with a step formed on a lever which is connected with the paper adjuster, wherein the slide plate is fixed in the initial position by abutting the end thereof to the step. With this structure the slide plate can be easily and surely positioned in the initial position.  
      In the first aspect of the present invention, the lever may be energized upward with a first elastic member; the releasing means may be provided with a projection placed downward from the paper presser; the surface of the lever, on which the step is provided, may be pressed downward against the spring force of the first elastic member with the projection so as to release the engagement of the step and the slide plate. Here, because the lever is pressed against the elastic member, the slide plate can be not only released from the initial position, but also the released condition can be maintained while the slide plate is moved. Further, by adjusting the length of the projection, the width of the space created between the paper presser and the slide plate can be modified. Accordingly, when the slide plate, on which the papers are fixed, is moved toward the paper processing main device, the operation releasing the slide plate from the initial position and the operation depressing the paper adjuster inside the base can be concurrently performed. The slide plate can be thus moved smoothly toward the paper processing main device.  
      In the first aspect of the present invention, the paper adjuster may be provided with an adjusting portion projectable from the surface of the base, and a controlled portion which controls an amount of the projection of the adjusting portion, wherein the controlled portion may be abutted to a guide provided on the base by the spring force of the second elastic member; and the releasing means may concurrently serve for the depressing means wherein by depressing the upper surface of the lever with the projection while depressing the second elastic member, the abutment between the controlled portion and the guide may be released, making the paper adjuster contained within the base. With this structure, the slide plate in the initial position can be smoothly released by means of the projection; the paper adjuster can be depressed to contain within the base; and most importantly, the release of the slide plate in the initial position and the depression of the paper adjuster within the base can be well maintained while the slide plate is moved.  
      In the first aspect of the present invention, the position controlling means may be formed as a surface provided at the end of the base where opposite to the place that the paper processing main device is provided, wherein the slide plate is fixed in the initial position by abutting the end thereof to the surface. With this structure, the slide plate may be set in the initial position by means of both the step formed on the lever and the surface.  
      In the first aspect of the present invention, the first positioning means may be formed as a scale, setting the paper adjuster as a datum starting point, and running parallel to the direction in which the side plate is moved. With this structure, the end of the papers can be arbitrarily set, so that the user can determine the exact place of the papers on which perforations, etc. are actually performed regardless that the user use different standard sizes at the same time.  
      In the first aspect of the present invention, a plurality of ratchet teeth running parallel to the scale and a ratchet claw may be provided facing to each other, either on the base or the side plate, wherein the ratchet teeth and the ratchet claw are engageable with each other by making the ratchet claw projectable from the base or the side plate. With this structure, the slide plate can be firmly fixed when the papers are abutted to the paper adjuster. The ratchet claw, on the other hand, can be easily released from the ratchet teeth by moving the slide plate, so that the user feels any hampers when starting to slide the slide plate.  
      In the first aspect of the present invention, the second positioning means may be provided as a stopping portion formed on a given portion of the base, wherein the slide plate is positioned by abutting the end thereof, where facing to the paper processing main device, to the stopping portion. Accordingly, regardless of the simple structure, the slide plate can be firmly fixed in a given position.  
      In the first aspect of the present invention, the sliding means may include the mechanism that a lock plate is shifted downward to press the paper presser toward the slide plate, and that the slide plate pressed by the paper presser is moved. With this structure, the papers can be fixed smoothly on the slide plate. Further, when fixing the papers on the slide plate, the fixation to the slide plate by the position controlling means is released, and the paper adjuster is depressed within the base at the same time. The slide plate, on which the papers are fixed, can be moved toward the paper processing main device without any additional procedures. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a full perspective view of a paper processing apparatus according to a first embodiment of the present invention;  
       FIG. 2  is a longitudinal sectional view showing main parts of a paper processing main device and a base according to a first embodiment of the present invention;  
       FIG. 3  is a partial front sectional view showing main parts of the paper processing main device according to a first embodiment of the present invention;  
       FIG. 4  is a partial sectional view that a slider is cut in half according to a first embodiment of the present invention;  
       FIG. 5  is a top view of the base according to a first aspect of the present invention;  
       FIG. 6  is a front view of the base according to a first aspect of the present invention;  
       FIG. 7  is a side view of the base according to a first aspect of the present invention;  
       FIG. 8  is a partial front sectional view of the base according to a first aspect of the present invention;  
       FIG. 9  is a partial front sectional view of the base according to a first aspect of the present invention;  
       FIG. 10  is a partial longitudinal sectional view laterally showing main parts of a slide plate according to a first aspect of the present invention;  
       FIG. 11  is a partial longitudinal sectional view laterally showing another main parts of the slide plate according to a first aspect of the present invention;  
       FIG. 12  is a longitudinal sectional view showing main parts of a paper presser in a condition that the paper presser is pressed according to a first aspect of the present invention;  
       FIG. 13  is a longitudinal sectional view showing another main parts of the paper presser in a condition that the paper presser is pressed according to a first aspect of the present invention;  
       FIG. 14  is a longitudinal sectional view showing main parts of the paper presser in a condition that the paper presser is slided according to a first aspect of the present invention;  
       FIG. 15  is a longitudinal sectional view showing another main parts of the paper presser in a condition that the paper presser is slided according to a first aspect of the present invention;  
       FIG. 16  is a full perspective view of the paper processing apparatus according to a second aspect of the present invention;  
       FIG. 17  is a partial longitudinal sectional view laterally showing main parts of the slide plate according to a second aspect of the present invention;  
       FIG. 18  is a longitudinal sectional view showing main parts of the paper presser in a condition that the paper presser is pressed according to a second aspect of the present invention;  
       FIG. 19  is a schematic perspective view mainly showing an arrangement of ratchet teeth and ratchet claws according to a second aspect of the present invention;  
       FIG. 20  is a longitudinal sectional view mainly showing a condition in that the paper presser is not pressed according to a third aspect of the present invention;  
       FIG. 21  is a longitudinal sectional view mainly showing a condition in that the paper presser is pressed according to a third aspect of the present invention;  
       FIG. 22  is a longitudinal sectional view mainly showing another condition in that the paper presser is pressed according to a second aspect of the present invention;  
       FIG. 23  is a top view of the base with another embodiment of a paper adjuster according to a first aspect of the present invention;  
       FIG. 24  is a partial sectional view laterally showing a conventional punched device;  
       FIG. 25  is perspective view of a conventional paper cutter;  
       FIG. 26  is the same with the  FIG. 17  except for a surface not included; and  
       FIG. 27  is the same with the  FIG. 18  except for the surface not included. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Preferred embodiments of the present invention will be described with reference to the accompanying drawings.  
      Hereinafter describes an Embodiment 1. As shown in  FIG. 1 , a paper processing apparatus  1  is composed of a base  3 , on which papers are placed, and a paper processing main device  2  (hereinafter refer to as a main device  2 ) with a porous punch. For making an explanation easier, in a top view of the paper processing apparatus  1 , a longitudinal direction of the main device  2  refers to a lateral direction, and a direction orthogonal to the lateral direction refers to a lengthwise direction. A direction perpendicular to the surface of the base  3  refers to a vertical direction.  
      A slide plate  4  is provided on the base  3  wherein the slide plate  4  is guided by a guide rib  25  formed on the base  3  (see  FIG. 8 ). The slide plate  4  is movable on the base  3  in a lengthwise direction, so that the slide plate  4  can come close to or apart from the main device  2 . On each lateral side of the slide plate  4 , a paper adjuster  12  for arranging the end of the papers is provided upward from the slide plate  4 . Further, on the slide plate  4 , a paper presser  5  is provided; the paper presser  5  is movable in a vertical direction according to a rotational operation of a handle  6  and presses to hold the papers placed on the slide plate  4 .  
      Between the main device  2  and the base  3 , an insertion opening  31  is formed spread in a lateral direction, so that the papers placed on the slide plate  4  can be inserted. As shown in  FIG. 2 , between the main device  2  and the base  3 , a space portion  32 , penetrated in a lengthwise direction and spread in a lateral direction, is formed. The space portion  32  has the insertion opening  31  and a penetration opening  33  which is provided on the opposite side from the insertion opening  31 , and the both openings  31 ,  33  are opened. The penetration opening  33  is also formed in a lateral direction.  
      Because of the above structure, any paper wastes accumulated in the space portion  32  can be easily eliminated from either the insertion opening  31  or the penetration opening  33  with any kinds of eliminators by introducing either from the insertion opening  31  or the penetration opening  33 . Further, by introducing a paper into the insertion opening  31 , the user can push out the wastes from the penetration opening  33 . The wastes can be eliminated irrespective of a working condition of a punch  37 .  
      As shown in  FIG. 3 , each lateral end of the main device  2  is placed on the base  3  while the intermediate portion of the main device  2 , not including the lateral ends, is provided with a slide rail  35  spaced from the base  3 . Here, in  FIG. 3 , although only one side of the slide rail is shown, the other side should be considered as the same.  
      In  FIGS. 2 and 3 , a punch support  36  is fitted to the slide rail  35 . A slider  39  is slidably engaged with the slide rail  35 , but the slide range of the slider  39  is restricted by a guide groove  45 . See  FIG. 1 .  
      The slide rail  35 , as shown in  FIG. 2 , is provided with a through hole  42 , so that the punch  37  can be inserted thereinto. The number of the through hole  42  is decided based on a standard paper size to be used. In case of the A 4 , 30 through holes are needed while  26  in case of the B 5 . Further, on a side face of the slide rail  35 , a long hole  43  is formed wherein an operation pin  38  provided on the punch  37  is guided by the long hole  43 . The punch  37  is thus restricted to the vertical movement.  
      The slider  39  is provided with a cam surface  46 . The cam surface  46  is, as shown in  FIG. 4 , in waveform. The operation pin  38  is guided from one end, along the cam surface  46 , and the operation pin  38  is moved in a vertical direction along the cam surface  46  while the slider  39  is slided. See  FIG. 3 .  
      Specifically, by sliding the slider  39  in a lateral direction along the guide groove  45 , the operation pin  38  is engaged with the cam surface  46 , pressing down and up the punch  37 . The cutting edge of the punch  37  pressed down along the cam surface  46  can be inserted through a punch hole  41  formed on the base  3 .  
      With the above structure, the papers can be perforated with a given interval. Paper wastes produced by the punching operation can be received in a waste container  47  formed on the base  3 . The paper wastes are dischargeable to the outside by removing an openable cover plate (not shown).  
      On the front side of the main device  2  (the insertion opening side), the base  3  on which the papers are placed is provided. On each side of the base  3 , a side plate  11  is provided. On the front side of the main device  2 , a paper adjuster  9  is also provided in such a manner that the paper adjuster  9  can be elevated from the base  3  in the vertical direction. An adjusting surface of the paper adjuster  9 , where the end of the papers are adjusted, is formed running parallel to the direction in which the punch  37  is arranged.  
      The paper adjuster  9  is provided with a second spring  22  (described hereinafter), so that the paper adjuster  9  is energized upward, elevated from the upper surface of the base  3 . On each side of the paper adjuster  9  is engaged with a pair of levers  10  provided in a lengthwise direction. The pair of the levers  10  are placed within grooves (hereinafter described) formed on the base  3  in a lengthwise direction, and energized upward with a spring.  
      As shown in, for example,  FIG. 11 , the paper adjuster  9  includes: an adjusting portion  9   a  to which the end of the papers are abutted and elevatable from the upper surface of the base  3 ; and a controlled portion  9   b  abutted to a back surface of a guide  17  with a spring force of the second spring  22 . The guide  17  works not only for a guiding surface of the papers which are abutted to the paper adjuster  9 , but also for a stopper against the controlled portion  9   b.    
      The paper adjuster  9  engaged with the pair of the levers  10  is containable within the base  3  but energized upward with a first spring  21  and the second spring  22 . The paper adjuster  9  and the levers  10  are thus movable in a vertical direction; the adjusting portion  9   a  of the paper adjuster  9  is elevated from the surface of the base  3  while keeping its posture perpendicular relative to the surface of the base  3 .  
      The guide  17  was described as the stopper against the controlled portion  9   b ; however, another embodiment may be applied. The adjusting portion  9   a  may be extended more than the portion connected with the levers  10 . An extended portion  9   c  (See  FIG. 23 ) as a controlled member is extended within the base  3 . In this case, the extended portion  9   c , which is extended from the adjusting portion  9   a , abuts to the edge faces of the grooves formed on both sides of the base  3 . The extended portion  9   c  similar to the controlled portion  9   b  can control how far the adjusting portion  9   a  allows being extended from the surface of the base  3 .  
      Some embodiments as to the extended portion  9   c  will be explained. For example, the height of the extended portion  9   c  may be set shorter than the height of the projected portion of the adjusting portion  9   a . Here, the projected portion means the portion that is projected from the surface of the base  3 . In this embodiment, the extended portion  9   c  is slidably provided within the grooves formed on both sides of the base  3 . In another embodiment, the top surface of the extended portion  9   c  is set equal to the one of the adjusting portion  9   a . Then, the height of the grooves formed on the both sides of the base  3  may be set equal to the height of the projected portion of the adjusting portion  9   a.    
      With the above structure, the extended portion  9   c  abuts to the upper edge of the grooves with the spring force of the secondary spring  22 , thereby enabling to control the amount of the projection of the adjusting portion  9   a  from the surface of the base  3 . In addition, when the levers  10  are pressed, the extended portion  9   c  is also depressed against the spring force of the secondary spring  22 , forcing the adjusting portion  9   a  to contain within the base  3 .  
      On the base  3 , adjacent to the paper adjuster  9 , the guide  17 , which guides the papers abutted to the paper adjuster  9 , is provided. Some portions of the guide  17  is partially extended in a lengthwise direction, forming extended guides  17 ′. See  FIG. 1 . Each end of the extended guides  17 ′ forms a stopping portion  16 , which restricts the movement of the slide plate  4 . That is to say, the stopping portion  16  may be regarded as a secondary positioning means, which controls where the slide plate  4  should be stopped when moved toward the main device  2 .  
      The stopping portion  16  may control the position of the slide plate  4  by making the portion abutted to one of engaged portions  19  formed on the slide plate  4 . The engaged portion  19  abutted to the stopping portion  16  may be structured as a concaved bottom formed on the slide plate  4  in a lengthwise direction.  
      The stopping portion  16  may be formed on each lateral end of the guide  17  instead of the above formation. Specifically, as shown in  FIG. 15 , when the slide plate  4  is slided toward the main device  2 , the tip of the slide plate  4  is made to abut to each lateral end of the guide  17 , thus controlling where the slide plate  4  is stopped. In addition, on each lateral end of the guide  17 , a guiding portion  20  upwardly slanted is provided so as to smoothly guide the papers onto the guide  17 .  
      With reference to FIGS.  5  to  15 , embodiments related to the slide plate  4  will be mainly discussed. The indication of the main device  2  is omitted in these figures.  FIG. 5 ,  FIG. 6  and  FIG. 7  show a top view, a front view and a side view respectively.  
      As shown in  FIG. 5 , each of the levers  10  is engaged with each side of the paper adjuster  9 . Each of the levers  10  is contained within each of grooves  27  formed on the base  3  in a lengthwise direction. The levers  10  are energized upward by the first spring  21 . The paper adjuster  9 , in its intermediate position, is energized with the second spring  22  also in the upward direction. The paper adjuster  9  and the levers  10  are containable within the base  3 , and at the same time are movable in a vertical direction.  
      As shown in  FIG. 6 , inside of the grooves  27  can be used as a guiding groove for the slide plate  4 . Each of flanged portions  23  formed downward from each lateral end of the slide plate  4  is provided with a slide rib  26 . Each of the slide rib  26  is slidably engaged with one of guide grooves  29  formed in the grooves  27 .  
      As shown in  FIGS. 6 and 7 , flanged sections  13  are upwardly provided on the both sides of the slide plate  4 . Between the flanged sections  13 , a spindle  14  is rotatably provided. A handle  6  and a lock plate  7  are assembled with a given angle relative to the spindle  14  in a circumferential direction, with a given distance. By employing the spindle  14 , the lock plate  7  and the handle  6 , the paper presser  5  can press the papers on the slide plate  4  or release therefrom.  
      By rotating the handle  6  (the spindle  14 ), an operational position and a non-operational position can be switched. The operational position means the condition that the lock plate  7  presses the paper presser  5  toward the slide plate  4 . And, the non-operational position means the condition that the handle  6  is re-rotated to an initial position so that the paper presser  5  is released from the pressed state.  FIG. 7  shows the operational position.  
      Next, the embodiment 1 will be explained with reference to FIGS.  8  to  15  ( FIGS. 8 and 9  show the non-operational position). In  FIGS. 8 and 10 , the lever  10  is energized upward by the first spring  21 , abutting to the back surface of the slide plate  4 . On the upper surface of the lever  10 , a step  15  is formed, which works as an engaging portion relative to the end of the slide plate  4 .  
      Specifically, the step  15  functions as a first position control means controlling an initial position of the slide plate  4 . The slide plate  4  fixed in the initial position by the step  15  can control the position of the papers placed on the slide plate  4 ; the rear end of the slide plate  4  also abuts to a surface  8  thus restricting the backward movement of the slide plate  4 .  
      As explained, the surface  8  restricts the backward movement of the slide plate  4 . Accordingly, the slide plate  4  in the initial position, positioned between the step  15  and the surface  8 , is fixed on the base  3 .  
      As shown in  FIG. 9 , on the inner surface of the flanged section  13  provided upward relative to the slide plate  4 , a rib  24  is formed in a vertical direction. The movement of the paper presser  5  is thus restricted by the rib  24 . It was explained that the slide rib  26  formed on the flanged portion  23  provided downward from the side edge of the slide plate  4  is slidably engaged with the guide groove  29  formed in the groove  27 . Here, as shown in  FIGS. 8 and 9 , it is possible to use space formed between the side plate  11  and the bottom surface of the base  3  as the guide groove in which the slide rib  26  is slidably engaged.  
      As shown in  FIG. 10  and  11 , the rotatable range of the handle  6  is restricted with handle stoppers  28   a ,  28   b  formed on the flanged section  13 . Referring to  FIG. 11 , an anti-slipped material  55  may be applied at the bottom surface of the paper presser  5 , effectively preventing the slippage of the papers when pressed by the paper presser  5 . The paper adjuster  9  is formed approximately L-shape in section, and one portion of the paper adjuster  9  is abutted to the back surface of the guide  17  by the spring force of the second spring  22 . The paper adjuster  9  is thus prevented form being fell off from the base  3 .  
      The paper adjuster  9  (approximately cup-shape in a top view) and the pair of the levers  10  are containable within the base  3  and projectable upward by the spring force of the both the first spring  21  and the second spring  22 . The paper adjuster  9  and the levers  10  are thus movable in a vertical direction relative to the surface of the base  3 . Accordingly, the surface of the adjusting portion  9   a  to which the papers are abutted can keep perpendicular relative to the surface of the base  3 .  
      As also shown in  FIG. 10 , a projection  18  is formed on the back surface of the paper pressure  5 , which abuts to the upper surface of the lever  10 , forming a space between the paper presser  5  and the slide plate  4  for the insertion of the papers.  
      The projection  18  is positioned between the back surface of the paper presser  5  and the slide plate  4  creating a space so that the papers are smoothly inserted thereinto. For making slide plate  4  surely abutted to the projections  18 , the slide plate  4  may partially have a cutout. In this case, the cutout should be formed as not hampering the movement of the projection  18 .  
      In FIGS.  12  to  15 , the handle  6  rotates, so that the lock plate  7  presses the paper presser  5  toward the slide plate  4 . As shown in  FIG. 12 , the projection  18  moves the lever  10  downward against the spring force of the first spring  21 , disengaging the end of the slide plate from the step. At the same time, as also shown in  FIG. 13 , according to the downward movement of the lever  10 , the adjusting portion  9   a  of the paper adjuster  9  is made to be contained within the base  3 .  
      Accordingly, the lever  10  maintains its downwardly pressed position by means of the projection  18 . The slide plate  4  can thus freely move toward the paper adjuster  9 , as shown by an arrow in  FIG. 13 . While the slide plate  4  is slided, the projection  18  pressing the lever  10  keeps its horizontal height. Thus, the lever  10  maintains its downwardly pressed position regardless of the position of the slide plate  4 . See  FIG. 14 .  
      The lever  10  includes the guiding portion  20  upwardly slanted from the step  15  to the paper adjuster  9 . See  FIG. 12 . When the slide plate  4  is moved toward the paper adjuster  9 , the projection  18  passes through the guiding portion  20 , whereby the back surface of the slide plate  4  abuts to the lever  10 .  
      In the above condition, even if the handle  6  is rotated to switch from the operational condition to the non-operational condition, the back surface of the slide plate  4  keeps abutment to the lever  10 . Accordingly, the lever  10  is successfully pressed by the back surface of the slide plate  4 ; the adjusting portion  9   a  of the paper adjuster  9  is also prevented from being projected from the base  3 .  
      As shown in  FIGS. 14 and 15 , when the slide plate  4  is moved to the given position that the papers are perforated with the main device  2 , the engaged portions  19  of the slide plate  4  abut to the stopping portions  16 .  
      When the slide plate  4  is positioned by abutting to the stopping positions  16 , the desired position of the papers can be set to the main device  2 . In the position, the slider  39  placed on the main device  2  is slided, enabling to perforate given numbers of holes onto the papers.  
      The stopping positions  16  may be formed on the upper surface of the lever  10 . In this case, even when the lever  10  is pressed downward, the stopping positions  16  are not contained within the base  3  thereby enabling to abut to the slide plate  4  moved.  
      Accordingly, in the embodiment 1 of the present invention, the user can visually confirm in advance the portions of the papers to be processed while making the papers abutted to the paper adjuster  9 . Further, since the papers are placed on and fixed to the slide plate  4  (stayed in the initial position), the papers, regardless of their standard paper sizes, can be well arranged thereon. Furthermore, because the slide plate  4 , on which the papers are placed, is simply moved to abut the stopping portions  16 , the user can well match the perforated position of the papers with the process position of the main device  2 .  
      Still further, the slide plate  4  can be released from the initial position by simply rotating the handle  6 ; the paper adjuster  9  is made to contain within the base  3  according to the release of the slide plate  4 . The paper adjuster  9  would never hamper the sliding movement of the slide plate  4 .  
      In addition, since the insertion opening  31  and the penetration opening  33  of the main device  2  are communicated with each other, paper wastes accumulated in the space portion  32  of the main device  2  can be easily eliminated therefrom.  
      Next, the embodiment 2 of the present invention will be described with reference to FIGS.  16  to  19 . Same reference numbers used in the embodiment 1 will be applied to the embodiment 2 if denoting identical parts, and the explanation thereto will be omitted.  
      In the embodiment 2, a scale  29  is formed on the side plates  11 . See  FIG. 16 . The scale  29  is formed, running parallel to the direction in which the slide plate  4  is moved. On the outer side surface of the flanged section  13  provided upward on the slide plate  4 , a reference line  30  is provided. By matching the reference line  30  to a certain mark on the scale  29 , the slide plate  4  can be positioned, keeping a certain distance from the paper adjuster  9 .  
      The slide plate  4  is moved to abut to the stopping portions  16  as described above. The distance therebetween can be determined by applying the scale  29 . By arbitrarily setting the reference line  30  to a certain mark on the scale, the user can freely determine the position of the edge of the papers relative to the slide plate  4 .  
      Even if the papers are not properly arranged on the slide plate  4 , the end of the papers can be projected outward from the penetration opening  33  through the space portion  32  of the main device  2  into which the papers are inserted. With this feature, perforation can be properly performed on the papers.  
       FIGS. 17 and 18 , as the same with  FIGS. 10 and 12  in the embodiment 1, show sectional view in a lengthwise direction where the lever  10  is provided. In  FIGS. 10 and 12  in the embodiment 1, the step  15  abutted to the end of the slide plate  4  is formed on the lever  10 . On the other hand, in the second embodiment, as shown in  FIGS. 17 and 18 , the step  15  is not formed on the lever  10 . Accordingly, the slide plate  4  can freely move on the base  3 , and is positioned by the scale  29 . This also means that the end of the slide plate  4  is not restricted by the lever  10 , whereby the slide plate  4  can also freely move on the slide plate  10 .  
      Furthermore, as shown in  FIGS. 26 and 27 , the surface  8  may be eliminated. The slide plate  4  can thus freely move backward toward the back side of the base  3 , whereby the distance to the paper adjuster  9  can be arbitrarily determined. Here, for preventing the slide plate  4  from being pulled off, any kinds of stopping mechanisms for the slide plate  4  (not shown) may be formed on the base  3 . Conventional stopping mechanisms may be also applied.  
      Further, as shown in  FIG. 19 , on the side of the side plate  11 , a plurality of ratchet teeth  27   a  may be formed. On the surface of the slide plate  4 , facing to the ratchet teeth  27   a , a plurality of or a single of ratchet claw(s)  27   b  may be formed, so that the ratchet teeth  27  and the ratchet claw are engaged with each other. The ratchet claw  27   b  may be a member with a spring, so that it is energized toward the ratchet teeth  27   a , but containable within the slide plate  4  with a certain pressure.  
      By providing the ratchet teeth  27   a  and the ratchet claw  27   b , the slide plate  4  can be set in the initial position and prevented from being displaced. While the slide plate  4  is slided in a lengthwise direction, the ratchet claw  27   b  is contained within the slide plate  4 , whereby there would be no hamper to position the slide plate  4  in a desired position.  
      Further, in case that the slide plate  4 , on which the papers are fixed, moves toward the main devices  2 , substantially no power would be needed to place the ratchet claw  27   b  within the slide plate  4 . It is also possible to provide a mechanism that when setting the slide plate  4  in the initial position, the ratchet  27   b  is temporarily contained within the slide plate  4 .  
      The position of the slide plate  4  relative to the paper adjuster  9  can be determined by the position of the ratchet teeth  27 ; the narrower the working pitches of the ratchet teeth  27   a  are, the more accurately the slide plate  4  can be set. Furthermore, the ratchet teeth  27   a  and the ratchet claw  27   b  may be formed inversely; that is, on the slide plate  4  and on the side plate  11 , respectively. The ratchet teeth  27   a  may be formed at any portions as long as they are formed on the track on which the slide plate  4  moves.  
      Next, the embodiment 3 of the present invention will be explained with reference to FIGS.  20  to  22 . Same reference numeral as embodiments 1 and 2 will be applied if used identically. Some of the explanations may be omitted if previously explained.  
      In the embodiment 3, the paper presser  5  is energized by a spring force of a paper presser spring  53 . On the upper surface of the paper presser  5 , a guide support  52  is provided upwardly. The paper presser  5  is slidable along the guide support  52  in a vertical direction. Between a cover  50  and the paper presser  5 , the paper presser spring  53  is provided, thereby pressing the paper presser  5  toward the slide plate  4  by the spring force thereof. For preventing the guide support  52  from being come out from the cover  50 , a guide support stopper  51  is provided at the end of the guide support  52 .  
      As shown in  FIG. 20 , in the condition that the lock plate  7  does not press the cover  50  (non-operational position), the paper presser  5  is energized upward by the projection  18  provided on the back surface of the paper presser  5 , and by the lever (not shown) energized upward, pressing the paper presser  5 . The space is thus formed between the paper presser  5  and the slide plate  4 , so that the papers can be inserted therebetween. Further, the cover  50  is abutted to the guide support stopper  51  provided at the guide support  52 , by means of the spring force of the paper presser spring  53 .  
      As shown in  FIG. 21 , by pressing the cover  50  via the lock plate  7  (operational position), the paper presser spring  53  is made to be compressed, increasing the pressing force of the paper presser  5  toward the slide plate  4 . In  FIG. 22 , the papers, in which the edge thereof is properly arranged with the paper adjuster  9 , are inserted between the paper presser  5  and the slide plate  4 , then the handle  6  is operated. With these operations, the papers are firmly pressed and held by the paper presser  5  with the pressing force of the paper presser spring  53 . Even if only a piece of paper is placed between the paper presser  5  and the slide plate  4 , the piece of paper can be firmly held by a given pressing force.