JP2012245620A - Blade and stitcher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade for a cut hole formation which can solve a problem that design freedom is low, and a resistance power is difficult to be decreased, and to provide a stitcher with the blade.SOLUTION: The blade that can form a cut hole P2 is used for a stitcher 1 in which a punching hole P1 and the cut hole P2 are formed in two or more papers P, a tip P51 part of a cut/raised piece P5 from the punching hole P1 is made to be inserted into the cut hole P2, the two or more papers P can be stitched together by the relation of the cut/raised piece P5 and the cut hole P2. The blade includes a window that receives the cut/raised piece P5 just before being inserted into the cut hole P2, and has a shape in which an edge for pressing the cut/raised piece P5 at the window and pulling it into the cut hole P2 is distributed to a region to a thickness direction larger than a thickness dimension of a blade material.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding machine that does not use a metal needle among binding machines that integrally bind the ends of a plurality of stacked sheets, and a blade used in the binding machine.

  2. Description of the Related Art Conventionally, as this type of binding machine, there is known a binding machine for joining a plurality of sheets to each other using cut and raised pieces cut and raised from a plurality of sheets by a punching blade and a punch plate. (For example, see Patent Document 1).

  In this type of binding machine, a cut and raised piece is formed when the punching blade and the cutting blade penetrate the paper, and after the cut and raised piece is inserted into the window of the cutting blade, the cutting blade and the cutting blade are By pulling out from the paper, the leading end side of the cut and raised piece is inserted into the cut hole formed by the cutting blade, and the binding operation is completed. And when the cut and raised piece inserted into the window is inserted into the cut hole along with the extraction operation of the cutting blade, that is, a large resistance is generated at the clinch point, and a large operating force is temporarily required. It will be. There is a desire to reduce the increase in operating force at such clinch points, and some countermeasure is desired.

  However, in the prior art, the edge for pressing the cut and raised piece in the window of the cutting blade and drawing it into the cut hole forms a straight line parallel to the paper. Therefore, the edge always comes into contact with the cut and raised piece at the same time, and the cut and raised piece only with a specific pattern in which the edge comes into contact with the proximal end side of the cut and raised piece and then comes into contact with the distal end side sequentially. Must be pressed. Therefore, the degree of freedom in design is low, and there is a certain limit to reducing the resistance.

JP 2010-228451 A

  An object of the present invention is to provide a blade for forming a cut hole and a binding machine including the blade, which can solve the problem that the degree of freedom in design is low and it is difficult to reduce the resistance force. .

  The present invention employs the following configuration in order to solve the above-described problems. That is, the blade according to the present invention forms a punched hole and a cut hole in a plurality of sheets, and inserts the leading end portion of the cut and raised piece cut out from the punched hole into the cut hole. The cut hole used in the binding machine can bind the plural sheets by mutual engagement with the cut hole, and can be formed immediately before being inserted into the cut hole. It has a window that accepts the raised piece, and the edge for pressing the cut and raised piece of the window and drawing it into the cut hole is distributed in a region in the thickness direction larger than the thickness dimension of the blade material. It is characterized by being.

  Here, the “paper” may be any sheet as long as it is in the form of a sheet, and includes paper and plastic or metal.

  If it is such, the edge for pressing the said cutting and raising piece of the window formed in the cutting blade and drawing it into the cut hole is not limited to the conventional one, The contact pattern with the piece can be rich in variations. Therefore, it is possible to provide a blade for forming a cut hole that can solve the problem that the degree of freedom in design is low and it is difficult to reduce the resistance.

  In order to perform the molding easily, it is preferable to bend one blade material.

  If the edge for pressing the cut and raised piece into the cut hole has a portion that first hits the cut and raised piece at the time of drawing and a portion that comes into contact with the cut and raised piece later, the edge and the cut and raised piece The abutting portion can be sequentially changed.

  As a specific example of the blade for forming the cut hole, one having a shape in which a cantilever piece that can be displaced in the thickness direction of the paper is formed at the edge of the cut hole.

  The cantilever piece is preferably formed at the edge opposite to the punched hole and has a shape that gradually becomes narrower in the direction of the punched hole.

  ADVANTAGE OF THE INVENTION According to this invention, the blade for cut hole formation which can eliminate the subject that the freedom degree of design is low and it is difficult to reduce resistance force, and a binding machine provided with this blade can be provided. .

The side view of the binding machine concerning one Embodiment of this invention. XX sectional drawing in FIG. The YY sectional view taken on the line in FIG. The side view which shows the blade drive mechanism of the embodiment. The top view which shows the punching blade of the same embodiment, a cutting blade, and an inner cam. The top view which shows typically the punching hole of the same embodiment, a cut hole, and a cutting piece. The rear view which shows the cutting blade of the embodiment. Schematic which shows the action | operation of the binding machine of the embodiment. Schematic which shows the action | operation of the binding machine of the embodiment. Schematic which shows the action | operation of the binding machine of the embodiment. Schematic which shows the action | operation of the binding machine of the embodiment. Schematic which shows the action | operation of the binding machine of the embodiment. The figure which shows typically the principal part of the cutting blade of the same embodiment, and a cutting and raising piece. The figure which shows typically the principal part of the cutting blade and the cutting and raising piece in the modification of this invention. The figure which shows typically the principal part of the cutting blade and the cutting and raising piece in the modification of this invention. The figure which shows typically the principal part of the cutting blade and the cutting and raising piece in the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention. The figure which shows typically the punching hole, cut hole, and cut-and-raised piece of the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The binding machine of the present invention is not limited to that of the present embodiment described below.

  As shown in FIGS. 1 to 12, the binding machine 1 forms punch holes P1 and cut holes P2 in a plurality of sheets of paper P, and cuts and raises pieces P5 cut and raised from the punch holes P1. The booklet B can be made by binding the plural sheets of paper P to each other by being inserted through the hole P2.

  As shown in FIGS. 2 and 3, the booklet B is formed by bundling a plurality of sheets P, and these sheets P are joined to each other at a joint portion P3 set at the corner P4. . The joining portion P3 includes a punching hole P1 formed in each paper P by a punching blade 32 penetrating from the one surface Pa side of the paper P, and a lifting hole formed in each paper P adjacent to the punching hole P1. It is composed of a cut hole P2 and a cut and raised piece P5 cut and raised from the punching hole P1 to the other surface Pb side of the paper P. The plurality of sheets P are joined to each other by passing the leading end P51 side of the cut and raised pieces P5 through the cut hole P2 and leading to the one surface Pa side of the sheet P.

  As shown in FIGS. 2, 3, 6, and 10 to 12, the cut-and-raised piece P5 has a tongue-like shape in which one end forms a semicircular arc shape. Note that the cut and raised piece P5 can be variously changed such as an arrowhead shape, and is not limited to the one in the present embodiment.

  As shown in FIGS. 2, 3, 6, and 10 to 12, the punching hole P1 has a size and a shape corresponding to the cut and raised piece P5. After the cut and raised piece P5 is cut and raised, the one end corresponding to the shape of the cut and raised piece P5 is a long hole-like space having a semicircular arc shape. Further, it is continuous with the base end of the punching hole P1 shown in the present embodiment, and it suppresses breakage that alleviates stress concentration on the base end P52 of the cut and raised piece P5 when the cut and raised piece P5 is inserted into the cut hole P2. An escape portion P6 is provided. The punching hole P1 can be variously changed and is not limited to the one in the present embodiment.

  As shown in FIGS. 2, 3, 6, and 10 to 12, the cut hole P <b> 2 is for engaging the cut and raised piece P <b> 5 and has a W shape in plan view. That is, the cut hole P2 includes first, second, third, and fourth slits P21, P22, P23, and P24 that are continuous through the first, second, and third bending points P25, P26, and P27. I have. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2.

  The cantilever piece P7 formed in the intermediate part is formed at the edge opposite to the punching hole P1 with the cut hole P2 as a boundary, and the outer ends thereof are the second slit P22 and the third slit. The shape extends along P23, in other words, a triangular shape that gradually narrows in the direction of the punching hole P1. The pair of cantilever pieces P8 formed on the left and right sides of the cantilever piece P7 are formed on the edge on the same side as the punching hole P1 with the cut hole P2 as a boundary. The outer end of P8 extends along the first slit P21 and the second slit P22, and the other cantilever P8 has the third slit P23 and the fourth slit P24 at the outer ends. It has a shape that extends along In other words, these cantilever pieces P8 have a triangular shape that gradually becomes wider in the direction of the punching hole P1. That is, since the cantilever pieces P7 and P8 are shaped so that the tips become narrower toward the first, second and third bending points P25, P26 and P27, the cut and raised pieces P5 pass through the cut hole P2. When it is pushed upwards, it will be double-spread. The cut holes can be variously changed and are not limited to those described above.

  When the cut and raised pieces P5 described above are engaged with the cut hole P2, as shown in FIGS. 2 and 6, the left and right edges of the cut and raised pieces P5 are the first slit P21 and the fourth slit of the cut hole P2. The engaging portions K1 and K2 are respectively engaged with P24. That is, the linear distance L1 between the first and third bending points P25 and P27 is set smaller than the linear distance L2 between the engaging portions K1 and K1.

  The binding machine 1 used when binding the paper P in this way will be described with reference to FIGS. 1, 2, 4, 5, and 7 to 12. FIG.

  As shown in FIGS. 1, 2, 4, 5, and 7 to 12, the binding machine 1 is formed by punching a punching hole P1 while forming cut and raised pieces P5 on a plurality of sheets P. A blade 32, a cutting blade 33 provided adjacent to the punching blade 32 for locking the tip P51 side of the cut and raised piece P5, and the punching blade 32 and the cutting blade And a punch base 4 disposed on the base portion 2 with a paper insertion gap 35 interposed therebetween. Then, the punching blade 32 and the cutting blade 33 held by the base portion 2 are driven so as to penetrate the paper P inserted into the paper insertion gap 35 and protrude toward the punch table 4 side. Thus, a punching hole P1 and a cut hole P2 are formed in the paper P. Next, the cutting blade 33 and the cutting blade 32 are used as a base in a state where the tip P51 side of the cut and raised piece P5 cut and raised from the punching hole P1 to the punch base 4 is engaged with the cutting blade 33. The sheet P is bound by passing the cut and raised piece P5 through the cut hole P2 by performing the extraction operation so as to return to the portion 2 side.

  In other words, the binding machine 1 is for making a booklet B by joining a plurality of sheets of paper P. The binding machine 1 temporarily moves upward from the standby position (N) to the protruding side so that the punching hole is formed. A punching blade 32 and a cutting blade 33 for forming P1 and a cut hole P2, a base portion 2 for housing the punching blade 32 and the cutting blade 33 at the standby position (N), the punching blade 32 and the cutting blade A slide member 31 that holds the insert blade 33 and can be moved up and down in the up-and-down direction that is the protruding and retracting direction with respect to the base portion 2, and a gap for inserting the paper P on the upward surface F14 side that is the outer surface side of the base portion 2 And a punch base 4 disposed via 35. An operation lever 5 is rotatably attached to the base portion 2, and a link mechanism 6 connected to the operation lever 5 is accommodated inside the base portion 2.

  As shown in FIGS. 1, 2, and 8 to 12, the base portion 2 includes a base frame 21 having a space in which the slide member 31 and the link mechanism 6 are arranged, and a lower portion of the base frame 21. And a base cover 22 fitted on the side.

  As shown in FIGS. 1, 2, and 8 to 12, the base frame 21 is positioned above the operation lever 5 and the front housing F that forms the upward surface F <b> 14 of the base portion 2. It consists of a rear housing R that forms a handle portion to which a hand is put in operation, and is integrally formed of synthetic resin.

  As shown in FIGS. 1, 2, and 8 to 12, the front housing F includes a top wall F1, a front wall F2 depending from the front edge of the top wall F1, and left and right side edges of the top wall F1. It has left and right side walls F3 depending from the inside, and a space for accommodating the blade unit 3 is provided inside. The ceiling wall F1 has an opening F11 through which the punching blade 32 and the cutting blade 33 pass. A locking wall F13 for locking the arm 342 of the inner cam 34 is provided on the lower surface side of the top wall F1. A gap 35 for inserting the paper P is formed between the upward surface F14 which is the upper surface of the top wall F1 and the downward surface 414 of the punch table 4. The side wall F3 is provided with a rail groove (not shown) for guiding the slide member 31 in the vertical direction on the front side, and a long hole (not shown) for guiding the drive shaft 36 in the vertical direction at the center. It has been. The operation lever 5 is attached to the side wall F3 via a lower support shaft 53 so as to be rotatable in the vertical direction.

  As shown in FIG. 1, the rear housing R has a shape suitable for placing a hand. The rear wall R1 rises from the rear end of the top wall F1 of the front housing F, and the upper end of the front wall R1. A ceiling wall R2 extending rearward from the right side, left and right side walls R3 depending from both left and right ends of the ceiling wall R2, and a rear wall (not shown) depending from the rear end of the ceiling wall R2. It has a space to accommodate A first link member 61 is rotatably attached to the side wall R3 via an upper support shaft 64.

  As shown in FIGS. 1 and 8 to 12, the base cover 22 is fitted on the lower side of the base frame 21.

  The blade unit 3 having the punching blade 32 and the cutting blade 33 is housed in the base portion 2 formed as described above.

  As shown in FIGS. 4 and 8 to 12, the blade unit 3 is attached to the slide member 31 and a slide member 31 that is guided by the rail groove of the base frame 21 and can be moved up and down while maintaining a vertical posture. A punching blade 32, a cutting blade 33 disposed adjacent to the punching blade 32, and an initial posture (S) which is disposed inside the punching blade 32 and fits in the punching blade 32, is outside the punching blade 32. An inner cam 34 pivotally supported by the slide member 31 via a shaft 341 between the projecting rotation posture (K) and the inner cam 34 in a direction of self-returning to the initial posture (S). And a coil spring (not shown) for rotating and energizing the motor.

  As shown in FIG. 4, the slide member 31 is a block-shaped member having a protrusion 311 that is slidably engaged with the rail groove of the base frame 21 in the vertical direction, and the link mechanism via the drive shaft 36. 6 is connected. That is, the drive shaft 36 is engaged with a long hole 614 provided at the tip of the first link member 61 of the link mechanism 6.

  As shown in FIGS. 2, 4, 5, and 8 to 12, the punching blade 32 is used to form a tongue-like cut and raised piece P5 on a sheet of paper, and is formed on a single sheet metal material. It is made by punching and bending. Further, the punching blade 32 includes a blade-like auxiliary blade portion 38 for forming the escape portion P6 extending continuously outward.

  The cutting blade 33 forms a cut hole P2 composed of a W-shaped slit, and has a W-shaped cross section. Specifically, the cutting blade 33 includes a first blade 71 that forms a first slit P21 of the cut hole P2, and a second blade as shown in FIGS. The second blade 72 that forms the slit P22, the third blade 73 that forms the third slit P23, and the fourth blade 74 that forms the fourth slit P24. The first blade 71 and the second blade 72 are continuous via a fold line 75, and the second blade 72 and the third blade 73 are continuous via a fold line 76, and the third blade 73 and the fourth blade 74 are continuous through a folding line 77, and are formed by punching and bending a single sheet metal material.

  A central portion of the cutting blade 33 is provided with a window 331 that allows the cut and raised piece P5 punched from the paper P to pass therethrough and receives the cut and raised piece P5 immediately before being inserted into the cut hole P2. The window 331 is mainly formed in the second blade 72 and the third blade 73, and both sides of the window 331 slightly exceed the folding lines 75 and 77 by a certain size, and the first blade 71 and the fourth blade 331. It extends to the blade 74 as well. The edge on the front end side of the window 331, that is, the edge 332 for pressing the cut and raised piece P5 in the window 331 and drawing it into the cut hole P2 is distributed in the region 335 in the thickness direction larger than the thickness dimension of the blade material. It has a shape like this. More specifically, the edge 332 is formed by a first edge 81 formed by the first blade 71, a second edge 82 formed by the second blade 72, and a third blade 73. A third edge 83 is formed, and a fourth edge 84 is formed by the fourth blade 74. The second edge 82 and the third edge 83 are centered on a central fold line 76. The edge 83, and the first edge 81 and the fourth edge 84 are line symmetrical. The cutting blade 33 is formed by inclining a surface including an edge 332 for pressing the cutting and raising piece P5 into the cut hole P2 with respect to a plane orthogonal to the drawing direction, so that the edge 332 is simultaneously cut. It is made not to contact | abut to the raising piece P5. In other words, the edge 332 for pressing the cut and raised piece P5 and pulling it into the cut hole P2 includes a portion 85 that hits the cut and raised piece P5 first when retracted, and a portion 86 that hits the cut and raised piece P5 later. Is. In this embodiment, the outer edge portions of the first edge portion 81 and the fourth edge portion 84 are portions 85 that first hit the cut and raised piece P5, and other portions of the edge 332 hit the cut and raised piece P5 with a delay. It corresponds to the part 86. And the boundary part 87 vicinity of the 2nd edge part 82 and the 3rd edge part 83 is a part which hits the cutting piece P5 most late. More specifically, as shown in FIG. 7, the edge 332 has an inverted V-shaped symmetrical shape centered on a central fold line 76 in the rear view and the front view. Note that the boundary portion 87 between the second edge portion 82 and the third edge portion 83 is tapered or notched so as not to hit the cut and raised piece P5 in order to reduce friction during drawing. You may do it. Further, the size and shape of the cutting blade and the window can be variously changed, and are not limited to those described above.

  As shown in FIGS. 2, 5 and 8 to 12, the inner cam 34 has a shaft 341 at the base end, and the cut and raised piece P5 is inserted into a window 331 provided in the cutting blade 33 at the distal end. The shaft 341 is supported by the punching blade 32 and the slide member 31. An arm 342 for rotating the inner cam 34 protrudes from the base end of the inner cam 34.

  The blade unit 3 configured as described above is moved upward via the link mechanism 6 accommodated in the base frame 21 by operating the operation lever 5.

  As shown in FIGS. 1 and 4, the operation lever 5 includes a metal lever plate 51 and a resin lever cover 52 mounted on the outside of the lever plate 51. The lever plate 51 is obtained by bending a sheet metal material, and has a bottom wall 511 and side walls 512 rising from both side edges of the bottom wall 511. The operation lever can be variously changed and is not limited to the above.

  As shown in FIG. 4, the link mechanism 6 has a leading end connected to the slide member 31 via the drive shaft 36 and a rear end connected to the base frame 21 via an upper support shaft 64. In order to push up the first link member 61 about the one link member 61 and the lower support shaft 53 which is positioned below the first link member 61 and held by the base frame 21 The second and third link members 62 and 63 are provided. The second link member 62 has a base end connected to the base frame 21 via a lower support shaft 53. When the operation lever 5 is rotated upward, the base end is It rotates around the center. The third link member 63 connects the rotation end of the second link member 62 and the middle of the first link member 61. Specifically, one end of the third link member 63 is pivotally attached to the first link member 61 via a first coupling shaft 66 and the other end is coupled to the first link member 67 via a second coupling shaft 67. The second link member 62 is pivotally attached to the rotating end. A coil spring S3 is disposed between the first link member 61 and the top wall R2 of the rear housing R of the base frame 21, and the first link member 61 is moved downward by the coil spring S3. It is energized.

  As shown in FIGS. 1, 8 to 12, the punch table 4 is formed by cooperating with a top case 42 having a flat box shape and a punching blade 32 and a cutting blade 33 below the top case 42. P includes an anvil 41 for punching a punch hole P1 and a cut hole P2. The top case 42 is covered with a transparent window cover 43 attached to be openable and closable in order to remove the paper dust accumulated in the top case 42 to the outside.

  The anvil 41 is made of a metal having a punching portion 411 for forming a punching hole P1 in the paper P in cooperation with the punching blade 32 and a punching portion 412 that is a hole through which the cutting blade 33 passes. In this state, the base frame 21 is attached to the base frame 21 with screws (not shown) in a state of being superimposed on the lower surface of the top case 42. The anvil 41 is provided with a protrusion 413 for separating the paper P from the punch table 4 side. The protrusion 413 is disposed in the front side of the back side region located on the back side when viewed from the front of the binding machine 1 in the paper insertion gap 35.

  Next, the operation of the binding machine 1 will be described with reference to FIGS.

  In a state where the operation lever 5 is not operated, as shown in FIG. 8, the slide member 31 is held at the lower limit position, and the inner cam 34 maintains the initial posture (S) accommodated in the extraction blade 32. In this state, the plurality of overlapped sheets P are inserted to the back of the gap 35 formed between the upward surface F14 of the base frame 21 and the downward surface 414 of the anvil 41.

  After that, when the operation lever 5 is operated upward, the force applied to the operation lever 5 is converted into an upward movement of the slide member 31 through the link 6 and transmitted.

  More specifically, when the operator's hand is hung on the operation lever 5 and the rear part of the punch base 4 and is gripped, and the operation lever 5 is operated upward, the lever plate 51 of the operation lever 5 is moved downward. The second link member 62 provided integrally with the lever plate 51 rotates upward about the lower support shaft 53 while rotating about the lower support shaft 53. As a result, the second coupling shaft 67 provided on the rotating end side of the second link member 62 moves in the direction of the first link member 61, that is, forward and upward. The third link member 63 connected via the second coupling shaft 67 pushes the first link member 61 upward while standing up with the rotation of the second link member 62. That is, the first coupling shaft 66 provided on the rotating end side of the third link member 63 pushes the center of the first link member 61 upward against the urging force of the coil spring S3. And move. Accordingly, the first link member 61 rotates around the upper support shaft 64, and thus the front end portion thereof moves upward.

  In this way, the force of operating the operation lever 5 upward is transmitted to the drive shaft 36 via the second link member 62, the third link member 63, and the first link member 61. As a result, the slide member 31 is moved upward.

  When the slide member 31 starts to move upward, the leading edges of the punching blade 32 and the cutting blade 33 attached to the slide member 31 come into contact with the one surface Pa of the paper P, and the paper P is pressed to the anvil 41. Pushed up. When the operation lever 5 is further moved upward from this position, the punching blade 32 passes through the state shown in FIG. 9 while the paper P is pressed against the anvil 41 by the punching blade 32 and the cutting blade 33. The cutting blade 33 penetrates the paper P, and the paper P is punched with a punching hole P1, a relief portion P6, and a cut hole P2.

  When the punching blade 32 and the cutting blade 33 are further lifted after drilling, the arm 342 of the inner cam 34 disposed inside the punching blade 32 comes into contact with the locking wall F13, and the inner cam 34 and the slide member The inner cam 34 rotates to the rotation posture (K) as shown in FIG. 10 against the urging force of the coil spring disposed between the inner cam 31 and the coil 31. As a result, the leading end P51 side of the cut and raised piece P5 cut and raised from the punching hole P1 to the other surface Pb side of the paper P is inserted into the window 331 of the cutting blade 33.

  Next, when the operation of the operation lever 5 is released, the inner cam 34 is returned from the turning posture (K) to the initial posture (S) by the biasing of the coil spring. The punching blade 32 and the cutting blade 33 are moved downward on the immersive side by the urging of the coil spring S1 and the coil spring S3, and the punching blade 32 and the cutting blade 33 are moved to the paper while the paper P is pulled away from the anvil 41. Extracted from P. At that time, as shown in FIG. 11, the cut and raised piece P5 inserted into the window 331 of the cutting blade 33 passes through the cut hole P2 and is extracted to the one surface Pa side of the paper P, as shown in FIG. As described above, the plurality of sheets P are combined by the cutting blade 33.

  If the paper P is extracted from the binding machine 1 in this state, the booklet B described above is completed.

  The cutting blade 33, which is the blade of the present invention, and the engagement between the cut and raised piece P5 and the cut hole P2 will be described in detail below.

  When the operation of the operation lever 5 is released and the cutting blade 33 begins to be extracted from the paper P, the cut and raised piece P5 is pressed against the edge 332 on the front end side of the window 331 of the cutting blade 33, and the cut hole P2 side Move to. Further, when the cutting blade 33 moves in the extraction direction, the cut and raised piece P5 pressed by the edge 332 of the cutting blade 33 is inserted into the cut hole P2, and the cutting blade 33 is extracted from the paper P. The binding operation ends.

  More specifically, when the cutting blade 33 begins to be extracted from the paper P, the portion 85 of the edge 332 on the front end side of the window 331 that first contacts the cut and raised piece P5 at the time of drawing first comes into contact with the cut and raised piece P5. Then, the portion on the tip P51 side of the cut and raised piece P5 starts to be pressed in the direction of the cut hole P2. Then, the portion of the edge 332 that contacts the cut and raised piece P5 with a delay comes into contact with the cut and raised piece P5 sequentially, and the cut and raised piece P5 is drawn into the cut hole P2. At that time, the position in the depth direction where the edge 332 contacts the cut and raised piece P5 gradually moves from the position where the edge 332 contacts first to the base end P52 side of the cut and raised piece P5. At the same time, the position in the width direction where the edge 332 comes into contact with the cut and raised piece P5 gradually moves from the position in the vicinity of both sides where it first comes into contact to the center in the width direction of the cut and raised piece P5. Then, the cutting blade 33 is extracted from the paper P through a state in which the portion 86 that comes into contact with the cut and raised piece P5 is in contact with the cut and raised piece P5.

The extraction operation as described above is smoothly performed as the cantilever pieces P7 and P8 formed at the edge of the cut hole P2 are deformed in the thickness direction. After the extraction is completed, the cantilever pieces P7 and P8 try to return to the original state by the elastic force of the paper P, and come into contact with the cut and raised piece P5 so that the cut and raised piece P5 is detached from the cut hole P2. Will be suppressed.
<Effect of this embodiment>
As described above, the cutting blade 33 used in the binding machine 1 according to the present embodiment forms the punched hole P1 and the cut hole P2 in the plurality of sheets P, and is cut and raised from the punched hole P1. A binding machine in which the leading end P51 of the cut and raised piece P5 is inserted into the cut hole P2, and the plurality of sheets P can be bound to each other by the engagement of the cut and raised piece P5 and the cut hole P2. 13 and has a window 331 for receiving a cut and raised piece P5 immediately before being inserted into the cut hole P2, as schematically shown in FIG. 13, and the cut and raised piece P5 of the window 331 is used. Since the edge 332 for pressing and pulling into the cut hole P2 has a shape distributed in the region 335 in the thickness direction larger than the thickness dimension of the blade material, when used in the binding machine 1, Malfunction The resistance at the time of occur had withdrawal, it is easy to design lighter. That is, according to the present invention, the timing and position at which each part of the edge 332 contacts the cut and raised piece P5 is extracted as shown in FIG. 14 and FIG. 15 in addition to those schematically shown in FIG. Since it can be changed according to the operation, the degree of freedom in design is increased. As a result, the cutting blade 33 of the present embodiment can reduce the resistance force when passing the clinch point without difficulty. In other words, for example, as represented by the form of the cutting blade 33 shown in FIG. 13 to FIG. 15, the optimum cutting blade 33 corresponding to the number of sheets P, the shape of the cut and raised piece P5, and the like. Thus, the resistance force when the cut and raised piece P5 is pulled into the cut hole P2 can be optimized. That is, the cutting and raising piece P5 can be inserted through the cut hole P2 without difficulty, and it is possible to prevent unnecessary resistance from being applied to the cutting blade 33, so that the operation lever 5 can be returned to the initial position. It can be made smooth, and the uncomfortable feeling given to the user from the operation lever 5 can be reduced.

  Moreover, since the cutting blade 33 of the present embodiment is formed by bending a single blade material, it can be formed relatively easily and also can maintain strength. Since such a cutting blade 33 forms a blade only in the continuous tip region 78 as shown in FIG. 7, blade processing such as a blade polishing operation becomes easy. More specifically, a first tip region formed on the main blade like a conventional H-shaped cutting blade, and a sub blade provided discontinuously with the first tip region and cut from the edge of the window. Since the blade is provided on both the second tip region formed in the above, it is necessary to perform the blade attaching process a plurality of times, and the polishing operation is complicated. However, if it is like this embodiment, since blade processing can be performed comparatively easily, the effect that the sharpness of a blade can be stabilized is acquired. Further, as in the present embodiment, the window 331 having a depth in the thickness direction can be formed by a simple manufacturing method in which the folding is performed at the folding line 76 and the folding is performed at the folding lines 75 and 77.

  Further, the cutting blade 33 has a portion 85 where the edge 332 for pressing the cut and raised piece P5 and pulling it into the cut hole P2 hits the cut and raised piece P5 first at the time of drawing, and a portion hitting the cut and raised piece P5 with delay. 86. Specifically, as schematically shown in FIG. 13, the center of the edge 332 on the front end side of the window 331 is inclined to the front end side. Yes. In addition, although this invention also contains the cutting blade 33 typically shown in FIG. 16, the cutting blade 33 typically shown in FIG. 13 thru | or FIG. 15 is mentioned as a more preferable aspect for the reason mentioned above. .

  When the edge 332 is inclined as shown in FIG. 13 to FIG. 15, as the degree of inclination of the edge 332 is increased, the cut and raised piece P5 and the window 331 are inserted when the cut and raised piece P5 is inserted into the cut hole P2. Friction with the edge 332 can be reduced. Further, as shown in FIGS. 14 and 15, it is preferable to provide a taper or a notch at a portion corresponding to the bent portion, that is, at the intersection of the bend line and the edge 332. If it does in this way, when bending a sheet metal material and making the cutting blade 33, it can prevent that a material concentrates on the part where the contact area with the cutting and raising piece P5 becomes the largest at a clinch point. The resistance between the cut and raised piece P5 and the edge 332 of the window 331 when the cut and raised piece P5 is passed through the cut hole P2 can be reduced. Further, if the edge 332 has a bilaterally symmetric shape as in the present embodiment, the cut and raised piece P5 and the edge 332 on the tip side of the window 331 are symmetrically point contacted or close to each other, and the incision is made. When the blade 33 is extracted from the paper P, both sides of the cut and raised piece P5 are partially pressed evenly by the edge 332 of the window 331.

  Further, the cutting blade 33 is shaped so that cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2, and the cutting blade 33 is formed of paper. As it sinks to the P side, the cantilever pieces P7 and P8 formed in the vicinity of the cut hole P2 formed by the W-shaped cutting blade 33 have a shape that warps like a double door. Therefore, when the free end sides of the cantilever pieces P7 and P8 are displaced in the same direction, the cut and raised pieces P5 are smoothly passed through the cut hole P2. In other words, the free end sides of the cantilever pieces P7 and P8 are pushed downward, and the friction between the cut hole P2 and the cut and raised piece P5 can be reduced as much as possible. Therefore, the operation lever 5 can be pulled up with a lighter operation force. That is, it is not necessary to make the coil spring that gives a repulsive force to the operation lever 5 so strong. Furthermore, after the cutting blade 33 is completely pulled out, the cantilever pieces P7 and P8 attempt to return to the original position by the elastic force of the paper P, so that the cut and raised piece P5 can be firmly held. . More specifically, since the cantilever piece P7 presses the cut and raised piece P5 downward and the cantilever piece P8 presses the cut and raised piece P5 upward, such cantilever pieces P7 and P8 are formed at the edges. The engagement state between the cut hole P2 and the cut and raised piece P5 is maintained.

  In particular, in the present embodiment, the linear distance L2 between the engaging portions K1 and K2 is set to be larger than the linear distance L1 between the first and third bending points P25 and P27. When P5 passes through the cut hole P2, the bending points P25 and P27 are positively pressed by the cut and raised pieces P5, so that the cantilever pieces P7 and P8 are easily opened in a flap shape. In addition, this linear distance L1 and the linear distance L2 are not restricted to the relationship mentioned above, but can be variously changed. Specifically, in order to open the cantilever piece P8, the linear distance L1 and the linear distance L2 may be substantially the same dimension. For example, the linear distance L1 is set slightly larger than the linear distance L2. It does not matter. However, if the linear distance L1 and the linear distance L2 are set to the same distance, or if the linear distance L2 is set slightly larger than the linear distance L1, the cantilever piece P8 can be opened more favorably. .

  The present invention is not limited to the embodiment described above.

  The shape of the cutting blade and the shape of the cut hole formed by this cutting blade are not limited to those of the above-described embodiment. Further, the shape of the punching blade, the shape of the punched hole formed by the punching blade, and the shape of the cut and raised piece are not limited to those of the above-described embodiment. As these other modes, for example, those shown in FIGS. 17 to 32 can be considered. Here, FIG. 17 thru | or 32 is the figure which showed typically the state in which the cutting and raising piece was engaged with the cut hole, and about the cutting blade and the cutting blade, the shape of each cutting hole and the shape of the cutting blade Since the blade edge has a shape corresponding to the above, the illustration is omitted. Furthermore, the shape of the cut hole and the shape of the punched hole (and the shape of the corresponding cutting blade, punched blade, and cut-and-raised piece) shown in the following embodiments are the same as those in the other embodiments. Of course, it may be used in combination with these. In the following embodiments, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

<Modification (FIG. 17)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a V shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first bending point P25. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, A triangular shape that gradually narrows in the direction of the punching hole P1 is formed.

<Modification (FIG. 18)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially W shape in plan view. That is, the cut hole P2 includes first, second, third, and fourth slits P21, P22, P23, and P24 that are continuous through the first, second, and third bending points P25, P26, and P27. I have. Each of the first slit P21 and the fourth slit P24 is bent. More specifically, the first slit P21 and the fourth slit P24 have a bent portion outside the portion engaged with the edge of the cut and raised piece P5. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed in the intermediate part is formed on the edge opposite to the punching hole P1, and its outer end extends along the second slit P22 and the third slit P23. The shape, in other words, a triangular shape that gradually narrows in the direction of the punching hole P1. A pair of cantilever pieces P8 formed on the left and right sides of the cantilever piece P7 are formed on the edge on the same side as the punching hole P1, and one cantilever piece P8 has an outer end thereof. Has a shape extending along the first slit P21 and the second slit P22, and the other cantilever piece P8 has a shape in which its outer end extends along the third slit P23 and the fourth slit P24. I am doing. In other words, these cantilever pieces P8 have a polygonal shape that gradually becomes wider in the direction of the punching hole P1. The first slit P21 and the fourth slit P24 may be curved, and the shapes of the second slit P22 and the third slit P23 are not limited to those illustrated.

<Modification (FIG. 19)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially W shape in plan view. That is, the cut hole P2 has first, second, third, and fourth slits P21, P22 continuous through the first bending point P25, the second inflection point P26, and the third bending point P27. , P23, P24. The second slit P22 and the third slit P23 are bent, respectively, and are bent from the bent portion toward the second inflection point P26. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed in the intermediate part is formed on the edge opposite to the punching hole P1, and its outer end extends along the second slit P22 and the third slit P23. The shape, in other words, the shape gradually narrows in the direction of the punching hole P1. A pair of cantilever pieces P8 formed on the left and right sides of the cantilever piece P7 are formed on the edge on the same side as the punching hole P1, and one cantilever piece P8 has an outer end thereof. Has a shape extending along the first slit P21 and the second slit P22, and the other cantilever piece P8 has a shape in which its outer end extends along the third slit P23 and the fourth slit P24. I am doing. In other words, these cantilever pieces P8 have a shape that gradually becomes wider in the direction of the punching hole P1. The first slit P21 and the fourth slit P24 are not limited to those illustrated.

<Modification (FIG. 20)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially V shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first bending point P25. Each of the first slit P21 and the second slit P22 is bent. Specifically, the first slit P21 and the second slit P22 have a bent portion inside the portion engaged with the edge of the cut and raised piece P5. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, The shape is such that the width gradually decreases in the direction of the punching hole P1. The first slit P21 and the second slit P22 may be curved, and are not limited to those illustrated.

<Modification (FIG. 21)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially V shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first inflection point P25. The first slit P21 and the second slit P22 are bent, respectively, and are bent from the bent portion toward the first inflection point P25. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, The shape is such that the width gradually decreases in the direction of the punching hole P1. The first slit P21 and the second slit P22 are not limited to those illustrated.

<Modification (FIG. 22)>
The punching hole P1 has a semicircular shape at one end, and a cut and raised piece having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5 and has a straight line shape. That is, the cut hole P2 includes a single slit P21 that is inclined with respect to the base end of the cut and raised piece P5.

<Modification (FIG. 23)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially N shape in plan view. That is, the cut hole P2 includes first, second, and third slits P21, P22, and P23 that are continuous through the first and second bending points P25 and P26. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed on one side is formed on the edge opposite to the punching hole P1, and has an outer end extending along the second slit P22 and the third slit P23. In other words, it has a triangular shape that gradually becomes narrower in the direction of the punching hole P1. The cantilever piece P8 formed adjacent to the cantilever piece P7 is formed on the edge on the same side as the punching hole P1, and the outer end of the cantilever piece P8 is the first end. The shape extends along the slit P21 and the second slit P22. In other words, these cantilever pieces P8 have a triangular shape that gradually becomes wider in the direction of the punching hole P1.

<Modification (FIG. 24)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially U shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first inflection point P25. Each of the first slit P21 and the second slit P22 is curved. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, A substantially semicircular shape that gradually narrows in the direction of the punching hole P1 is formed.

<Modification (FIG. 25)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially W shape in plan view. That is, the cut hole P2 has first, second, third, and fourth slits P21, P22, P23, and P24 that are continuous through the first, second, and third inflection points P25, P26, and P27. It has. The first, second, third, and fourth slits P21, P22, P23, and P24 are respectively curved. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed in the intermediate part is formed on the edge opposite to the punching hole P1, and its outer end extends along the second slit P22 and the third slit P23. The shape, in other words, a substantially semicircular shape that gradually narrows in the direction of the punching hole P1. A pair of cantilever pieces P8 formed on the left and right sides of the cantilever piece P7 are formed on the edge on the same side as the punching hole P1, and one cantilever piece P8 has an outer end thereof. Has a shape extending along the first slit P21 and the second slit P22, and the other cantilever piece P8 has a shape in which its outer end extends along the third slit P23 and the fourth slit P24. I am doing. In other words, these cantilever pieces P8 have a substantially semicircular shape that gradually becomes wider in the direction of the punching hole P1.

<Modification (FIG. 26)>
The punching hole P1 has a semicircular shape at one end, and a cut-and-raised piece P5 having a tongue-like shape is cut out from the punching hole P1.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially N shape in plan view. That is, the cut hole P2 includes first, second, and third slits P21, P22, and P23 that are continuous via the first and second inflection points P25 and P26. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed on one side is formed on the edge opposite to the punching hole P1, and has an outer end extending along the second slit P22 and the third slit P23. In other words, it has a substantially semicircular shape that gradually becomes narrower in the direction of the punching hole P1. The cantilever piece P8 formed adjacent to the cantilever piece P7 is formed on the edge on the same side as the punching hole P1, and the outer end of the cantilever piece P8 is the first end. The shape extends along the slit P21 and the second slit P22. In other words, these cantilever pieces P8 have a substantially semicircular shape that gradually becomes wider in the direction of the punching hole P1.

<Modification (FIG. 27)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a V shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first bending point P25. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, A triangular shape that gradually narrows in the direction of the punching hole P1 is formed.

<Modification (FIG. 28)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially V shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first inflection point P25. The first slit P21 and the second slit P22 are bent, respectively, and are bent from the bent portion toward the first inflection point P25. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, A polygonal shape that gradually narrows in the direction of the punching hole P1 is formed. The first slit P21 and the second slit P22 are not limited to those illustrated.

<Modification (FIG. 29)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially U shape in plan view. That is, the cut hole P2 includes first and second slits P21 and P22 that are continuous via the first inflection point P25. Each of the first slit P21 and the second slit P22 is curved. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first slit P21 and the second slit P22, in other words, The semicircular shape is formed so as to gradually become narrower in the direction of the punching hole P1.

<Modification (FIG. 30)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially U shape in plan view. That is, the cut hole P2 includes first, second, and third slits P21, P22, and P23 that are continuous through the first and second bending points P25 and P26. A cantilever piece P7 that is displaceable in the thickness direction of the paper P is formed at the edge of the cut hole P2. This cantilever piece P7 is formed at the edge opposite to the punching hole P1, and its outer end extends along the first, second and third slits P21, P22, P23, In other words, it has an isosceles trapezoidal shape that gradually narrows in the direction of the punching hole P1.

<Modification (FIG. 31)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially W shape in plan view. That is, the cut hole P2 includes first, second, third, and fourth slits P21, P22, P23, and P24 that are continuous through the first, second, and third bending points P25, P26, and P27. I have. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P7 formed in the intermediate part is formed on the edge opposite to the punching hole P1, and its outer end extends along the second slit P22 and the third slit P23. The shape, in other words, a triangular shape that gradually narrows in the direction of the punching hole P1. A pair of cantilever pieces P8 formed on the left and right sides of the cantilever piece P7 are formed on the edge on the same side as the punching hole P1, and one cantilever piece P8 has an outer end thereof. Has a shape extending along the first slit P21 and the second slit P22, and the other cantilever piece P8 has a shape in which its outer end extends along the third slit P23 and the fourth slit P24. I am doing. In other words, these cantilever pieces P8 have a triangular shape that gradually becomes wider in the direction of the punching hole P1.

<Modification (FIG. 32)>
The punching hole P1 has an arrow shape in plan view, and a cut and raised piece P5 having a wide portion P56 on the tip P51 side is cut out from the punching hole P1 through the boundary portion P53. The cut and raised piece P5 includes a proximal end region P54 on the proximal end P52 side with the boundary portion P53 interposed therebetween, and a distal end region P55 on the distal end P51 side. The width of the wide portion P56 is the same as that of the proximal end P52 and the boundary. It is set larger than the width dimension of the part P53.

  The cut hole P2 is for engaging the cut and raised piece P5, and has a substantially W shape in plan view. That is, the cut hole P2 includes first, second, third, and fourth slits P21, P22, P23, and P24 that are continuous through the first, second, and third bending points P25, P26, and P27. I have. Cantilever pieces P7 and P8 that can be displaced in the thickness direction of the paper P are formed at the edge of the cut hole P2. The cantilever piece P8 formed in the intermediate part is formed at the edge on the same side as the punching hole P1, and its outer end extends along the second slit P22 and the third slit P23. The shape, in other words, a triangular shape that gradually becomes wider in the direction of the punching hole P1. A pair of cantilever pieces P7 formed on the left and right sides of the cantilever piece P8 is formed on the edge opposite to the punching hole P1, and one cantilever piece P7 has an outer end thereof. Has a shape extending along the first slit P21 and the second slit P22, and the other cantilever piece P7 has an outer end extending along the third slit P23 and the fourth slit P24. I am doing. In other words, these cantilever pieces P8 have a triangular shape that gradually becomes narrower in the direction of the punching hole P1.

  If the combination of the cut and raised pieces P5 and the cut holes P2 as shown in FIGS. 27 to 32 described above is employed, the joining state can be made better than the conventional one. That is, since the taper is provided in the direction of the punching hole P1, when a force toward the base end P52 is applied to the cut and raised piece P5, the boundary portion P53 or the boundary portion P53 of the cut and raised piece P5 is changed to the wide portion P56. The leading edge is caught by the taper. Therefore, even if some force is applied to the booklet B and the slit is greatly opened in the vertical direction, the engagement between the cut and raised piece P5 and the cut hole P2 is not released, and the engagement state Is preserved. Further, the shape of the cutting and raising piece P5 shown in FIGS. 27 to 32 is not limited to the shape shown in the drawing, and can be variously changed.

  In the arrow-shaped cut and raised piece P5 as shown in FIGS. 27 to 32, the width dimension of the wide portion P56 of the cut and raised piece P5 is set to be smaller than the width-side dimension of the window 331. It is preferable to keep it. Then, when the leading end region P55 including the wide portion P56 is pressed by the pushing portion 343 of the inner cam 34 and the cut and raised piece P5 passes through the window 331, both ends of the wide portion P56 do not contact the window 331. The cut and raised pieces P5 are smoothly inserted into the window 331.

<Other variations>
The binding machine may be provided with a plurality of cutting blades or a plurality of cutting blades. For example, a single cutting blade for forming a plurality of cut and raised pieces and a plurality of cutting blades corresponding to the plurality of cut and raised pieces, or a plurality of pieces for forming a plurality of cut and raised pieces And a plurality of cutting blades for forming a plurality of cutting and raising pieces, and a plurality of cutting blades for forming a plurality of cutting and raising pieces. The number of cutting blades corresponding to the plurality of cutting and raising pieces may be provided.

  Further, the projecting and retracting directions of these cutting blades and punching blades are not limited to those in which the projecting side of the cutting blade and punching blade is upward and the immersion side is downward, as shown in the above-described embodiment. It is also possible to use the cutting blade and the cutting blade as the lower side and the immersive side as the upper side. Further, the moving direction of the punching blade and the cutting blade is such that the punching hole and the cut hole are formed by temporarily moving downward, or the punching hole and the cut hole are moved by moving in the left-right direction or the oblique direction. It may be formed. For example, the thing of the specification which turned upside down from the thing of embodiment mentioned above is also considered. In the binding machine of this specification, “upward”, “downward”, “upward”, “downward”, “upper surface”, “lower surface”, “upper side” or “lower side” in the above-described embodiments are respectively “lower”. , “Upper”, “lowering”, “upward”, “lower surface”, “upper surface”, “upper side” or “lower side”.

  As long as the paper is in sheet form, various changes such as paper or plastic can be made. In addition, if a plurality of sheet bodies made of the same quality material are bound, it is possible to reduce the trouble in sorting and discarding.

  The contact timing and contact position between the cut and raised piece and the edge of the window can be variously changed. That is, all of the edges may hit the cut and raised pieces at the same time, or part of the edges may hit the cut and raised pieces with a time difference. Even if it hits with a time difference, one that abuts sequentially from the leading end to the base end of the cut and raised piece, one that abuts sequentially from the base end to the leading end of the cut and raised piece, or from the center to the end of the cut and raised piece There are various conceivable types, such as those that sequentially contact each other, those that sequentially contact from the end of the cut and raised piece toward the center, and those that sequentially contact from one end of the cut and raised piece to the other end.

  Moreover, you may implement | achieve the contact timing and contact position of such a cutting and raising piece and the edge of a window by providing the inclination of a thickness direction in blade raw material itself.

  The blade unit may have not only a three-piece structure of a cutting blade, a cutting blade and an inner cam, but also a two-piece structure of a cutting blade and a cutting blade. At this time, it is preferable that the punching blade is provided so as to be rotatable between a punching posture and a rotating posture, and a punching hole can be formed in the punching posture.

  The slide member is not limited to those described above, and can be variously changed. The slide member may be moved by a method other than the slide. Further, the link mechanism is not limited to the above-described ones, and can be variously changed. The base unit and the blade unit may be connected by a method other than the link.

  In addition, various changes may be made without departing from the spirit of the present invention.

P ... paper P1 ... punching hole P2 ... cut hole P5 ... cut raised piece P51 ... tip P7 ... cantilever 1 ... binding machine 331 ... window 332 ... edge 335 ... area

Claims (6)

A punching hole and a cut hole are formed in a plurality of sheets, and the leading end portion of the cut and raised piece that is cut and raised from the punched hole is inserted into the cut hole. A blade capable of forming the cut hole used in a binding machine capable of binding a plurality of sheets of paper,
It has a window for receiving the cut and raised piece immediately before being inserted into the cut hole, and the edge for pressing the cut and raised piece of the window into the cut hole is larger in the thickness direction than the thickness dimension of the blade material. A blade characterized by having a shape that is distributed in a region. The blade according to claim 1, which is formed by bending a single blade material. 3. The blade according to claim 1, wherein an edge for pressing the cut and raised piece into the cut hole includes a portion that first contacts the cut and raised piece when retracted and a portion that comes into contact with the cut and raised piece later. . The blade according to claim 1, 2 or 3, wherein the edge of the cut hole is shaped so that a cantilever piece that can be displaced in the thickness direction of the paper is formed. The blade according to claim 4, wherein the cantilever piece is formed at an edge opposite to the punching hole and has a shape that gradually becomes narrower in the direction of the punching hole. A binding machine comprising the blade according to any one of claims 1 to 5.

Images