JP2013082012A - Punching device, post-processing device, and image forming system - Google Patents

Abstract

Provided are a punching device, a post-processing device, and an image forming system capable of efficiently transmitting a driving force of a driving source even when punching a sheet having a large punching load.
A bend prevention shaft 322 and a frame 301 are configured such that when a load from a punch shaft 318 to 321 and a driving force of a drive motor are applied to the cam plates 309 and 310 and the cam plates 309 and 310 are bent, It abuts on the plates 309 and 310 to suppress bending of the cam plates 309 and 310.
[Selection] Figure 7

Description

  The present invention relates to a punching device, a post-processing device, and an image forming system.

  2. Description of the Related Art Conventionally, a punching device for punching holes in a sheet such as paper or an OHP film is known.

  In a conventional punching device, a cam plate is provided so as to be slidable by a driving force of a driving source such as a motor, and the cam plate is slid by fitting an engagement protrusion of a punch shaft into a cam groove formed in the cam plate. Some punch holes are punched in a sheet by moving the punch shaft up and down along the cam groove to apply a punching load to the sheet (for example, Patent Documents 1 and 2).

  According to the technology described in each of the above patent documents, the drilling apparatus can be downsized, so that space can be saved and the number of parts can be reduced, which is advantageous in terms of product cost. Further, since the driving force of the driving source can be efficiently transmitted to the punch shaft, the energy efficiency is also excellent.

JP 2003-1597 A JP 2001-198889 A

By the way, if the sheet can be punched by a relatively small punching load, such as plain paper or thin paper, the load on the driving source is small, and punch holes can be surely formed.
On the other hand, when punch holes are made in sheets such as thick paper that require a large punching load or a plurality of sheets, the load on the punch shaft sheet is repelled and transmitted to the cam plate. At this time, if the driving force of the drive source is applied to the cam plate at a certain level or more, the cam plate will bend beyond the mechanical resistance of the cam plate. Then, the driving force of the driving source is dispersed by the bending of the cam plate, and a sufficient driving force is not transmitted to the punch shaft. As a result, the driving force more than necessary is required for punching the sheet, and not only the energy efficiency is reduced, but the punching of the sheet may not be performed normally.

  An object of the present invention is to provide a punching device, a post-processing device, and an image forming system that can efficiently transmit the driving force of a driving source even when punching a sheet having a large punching load.

In order to solve the above problems, the invention according to claim 1 is a perforating apparatus.
A punch shaft that is supported so as to be reciprocally movable and opens a hole in the sheet;
The punch shaft engages with the punch shaft, extends in a direction intersecting the movement direction of the punch shaft, is provided so as to be able to reciprocate in the extending direction, and displaces the punch shaft in conjunction with the reciprocation. A driving force transmission member;
A drive unit that reciprocates the drive force transmission member by applying a drive force of a drive source at a drive force application position on one end side in the extending direction of the drive force transmission member;
When the load from the punch shaft and the driving force of the driving source are applied to the driving force transmitting member and the driving force transmitting member is bent, the driving force transmitting member comes into contact with the driving force transmitting member. A bending suppression portion for suppressing bending;
It is provided with.

The invention according to claim 2 is the punching device according to claim 1,
The bending suppression portion includes a first bending suppression portion that comes into contact with the drive transmission member when the driving force transmission member is bent in the first direction, and the driving force transmission member is in the first direction. And a second bending suppression portion that comes into contact with the drive transmission member when bent in the second direction on the opposite side.

The invention described in claim 3 is the perforating apparatus according to claim 2,
A box formed extending in the extending direction of the driving force transmission member, which accommodates the driving force transmission member and the punch shaft, and has the punch shaft on a surface intersecting the moving direction of the punch shaft Including a receiving body provided with an insertion hole through which it can be advanced and retracted,
An inner surface of the container functions as the second bending suppression part.

The invention according to claim 4 is the punching device according to any one of claims 1 to 3,
The bending suppression portion is in contact with the driving force transmission member at a position where the driving force transmission member bulges most in a bending direction of the driving force transmission member when the driving force transmission member is bent by a predetermined amount. .

Invention of Claim 5 is the punching apparatus as described in any one of Claims 1-4,
The bending suppression part includes a columnar bending suppression member that extends in a direction intersecting with the extending direction of the driving force transmission member and is disposed in proximity to the driving force transmission member.

The invention described in claim 6 is the perforating apparatus according to claim 5,
The bending suppressing member is formed in a columnar shape.

The invention according to claim 7 is the perforating apparatus according to claim 5 or 6,
The bending suppression member can change a distance from the driving force transmission member.

The invention according to claim 8 is the punching device according to claim 7,
The bending suppression member is formed in a columnar shape including an end surface having a major axis and a minor axis, and is provided to be rotatable with an extending direction as a supporting shaft, and the bending suppression member is rotated to rotate the bending. The distance between the bending suppressing member and the driving force transmitting member can be changed.

The invention according to claim 9 is the perforation apparatus according to any one of claims 5 to 7,
The bending suppressing member has a main body portion and a protruding portion that protrudes toward the driving force transmitting member from a position facing the driving force transmitting member of the main body portion and has a smaller diameter than the main body portion. It is characterized by.

The invention according to claim 10 is the punching device according to claim 6,
The bending suppression member is supported rotatably at the center of the columnar shape with the extending direction as a support shaft and following the sliding contact with the driving force transmission member.

The invention according to claim 11 is the punching device according to claim 3,
The first bending suppression part is formed in a flat plate shape, and abuts on the driving force transmission member on an outer surface.

The invention according to claim 12 is the punching device according to any one of claims 1 to 4,
A bulging portion is formed by bulging in the direction of bending from the driving force transmitting member,
The bending suppression part is in contact with the bulging part when the driving force transmission member is bent.

The invention according to claim 13 is the post-processing apparatus,
A connection portion between the punching device and the image forming apparatus according to any one of claims 1 to 8 is provided.

The invention according to claim 14 is the post-processing apparatus according to claim 9,
A booklet creation unit for receiving a sheet on which an image is formed and producing a booklet is provided.

According to a fifteenth aspect of the present invention, in the image forming system,
An image forming apparatus for forming an image on a sheet;
15. A post-processing apparatus according to claim 13, wherein the sheet on which an image is formed by the image forming apparatus is received and post-processing is performed on the sheet.

  According to the present invention, it is possible to efficiently transmit the driving force of the driving source even when punching a sheet having a large punching load.

1 is an overall configuration diagram of an image forming system according to the present embodiment. 1 is a block diagram illustrating a functional configuration of an image forming system. It is sectional drawing which shows schematic structure of a bookbinding apparatus. It is a front view of a punching device. It is a perspective view of a punching device. It is a right view of a punching device. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a general | schematic cross-sectional enlarged view explaining the arrangement | positioning position of a bending prevention axis | shaft. It is a figure explaining the punching operation | movement by a punching apparatus. It is a figure explaining the punching operation | movement by a punching apparatus. It is a figure explaining the punching operation | movement by a punching apparatus. It is a cross-sectional enlarged view explaining the effect | action of a bending prevention axis | shaft. It is a schematic cross-sectional enlarged view explaining the other form of a bending prevention axis | shaft. It is a schematic cross-sectional enlarged view explaining the other form of a bending prevention axis | shaft. It is a cross-sectional enlarged view explaining the other form of a bending prevention part. It is a cross-sectional perspective view explaining the other form of a bending prevention part.

  A perforating apparatus according to an embodiment of the present invention, a post-processing apparatus including the perforating apparatus, and an image forming system including the post-processing apparatus will be described with reference to the drawings. However, the present invention is not limited thereto. It is not something. In the present embodiment, a bookbinding apparatus will be described as an example of a post-processing apparatus (hereinafter, the post-processing apparatus may be referred to as a bookbinding apparatus).

  The image forming system 1000 according to the present embodiment includes, for example, an image forming apparatus A, a bookbinding apparatus B, a booklet storage apparatus C, and an automatic document feeder DF, as shown in FIG.

  The image forming apparatus A includes, for example, an image forming unit in which a charging unit 2, an image exposing unit 3, a developing unit 4, a transfer unit 5, and a cleaning unit 6 are arranged around a rotating image carrier 1.

  The image forming unit uniformly charges the surface of the image carrier 1 by the charging unit 2, and then performs exposure scanning based on image data read from the document by the laser beam of the image exposure unit 3 to form a latent image. To do. The image forming unit reversely develops the latent image by the developing unit 4 to form a toner image on the surface of the image carrier 1.

  The paper S fed from the paper storage unit 7A is sent to the transfer position. The toner image is transferred onto the paper S by the transfer unit 5 at the transfer position. The sheet S on which the toner image has been transferred is separated from the image carrier 1 after the surface charge is erased, and is transported by the transport unit 7B. The sheet S is subsequently heat-fixed by the fixing unit 8 and is discharged out of the image forming apparatus A from the sheet discharge roller 7C.

  When image formation is performed on both sides of the sheet S, the sheet S heated and fixed by the fixing unit 8 is branched from the sheet discharge path by the conveyance path switching unit 7D, and is switched back and reversed by the reverse conveyance unit 7E. After that, it is conveyed again to the image forming unit. An image is formed on the back surface of the sheet S by the image forming unit, and is discharged from the sheet discharge roller 7C to the outside of the image forming apparatus A through the fixing unit 8. The paper S discharged from the paper discharge roller 7C is sent to the bookbinding apparatus B.

  The toner remaining on the surface of the image carrier 1 after the image formation is removed by the cleaning unit 6 to prepare for the next image formation.

  An operation unit 9 including an input unit and a display unit is disposed on the upper part of the image forming apparatus A.

  The bookbinding apparatus B includes, for example, a transport unit 10, a paper discharge unit 20, a reversing unit 30, a sheet bundle storage unit 40, an adhesive application unit 50, a cover sheet supply unit 60, a cutting unit 70, a booklet forming unit 80, a punching device 300, and the like. Is a case binding apparatus.

  Note that, as the bookbinding apparatus B in the present embodiment, a side-stitching bookbinding apparatus, a center-folded and saddle-stitching bookbinding apparatus, a sealing bookbinding apparatus, and the like can be applied in addition to the case binding apparatus.

  As shown in FIG. 2, the control unit of the image forming system 1000 is a post-processing control that is a control unit that controls the production of the main control unit 100 provided in the image forming apparatus A and the booklet provided in the bookbinding apparatus B. Unit 200 and is connected by serial communication units 101 and 201. The post-processing control unit 200 controls each unit of the bookbinding apparatus B according to instructions from the main control unit 100.

  That is, the post-processing control unit 200 includes a motor M4 for driving the support member 41 that supports the sheet bundle, a punching device 300, a motor M1 for driving the coating roller 51, a booklet forming unit 80, a cutting unit 70, and the like. Control the drive.

  As illustrated in FIG. 3, the bookbinding apparatus B includes a connection unit for mechanically and electrically connecting to the image forming apparatus A, for example.

  The sheet S introduced into the transport path a of the transport unit 10 of the bookbinding apparatus B is nipped and transported between the transport rollers 11 and 12, and is branched to either the paper discharge unit 20 or the reversing unit 30 by the transport path switching unit Z1. Is done.

  A conveyance path switching unit Z2 disposed on the upstream side of the conveyance roller 11 in the sheet conveyance direction branches the sheet S discharged from the image forming apparatus A to either the conveyance path a or the conveyance path b. The sheet S conveyed to the conveyance path b is nipped by the conveyance roller 14 and sent to the booklet forming unit 80.

  When paper discharge to the paper discharge unit 20 is set, the transport path switching unit Z1 blocks the transport path c to the reversing unit 30 and opens the transport path d to the paper discharge unit 20.

  The paper S that passes through the conveyance path d to the paper discharge unit 20 is nipped by the conveyance roller 21 and conveyed upward, and is discharged and stored on the fixed paper discharge tray 23 at the top of the apparatus by the paper discharge roller 22.

The sheet S branched to the conveyance path c by the conveyance path switching unit Z1 is nipped by the conveyance roller 31 and conveyed to the punching device 300.
The punching device 300 punches holes in the conveyed paper S. A specific configuration of the punching device 300 will be described later. The paper S in which punch holes are made by the punching device 300 is sandwiched between the transport rollers 32, 33, and 34 and is stored at a predetermined position of the reversing unit 30.

  The reversing unit 30 includes an inclined sheet placement table 35, a swingable sheet rear end positioning member 36, an alignment member 37 that aligns the sheet S in the sheet width direction, a conveyance roller 38, and the like.

  The sheet bundle accommodating portion 40 includes a support member 41, a receiving plate, an alignment member, a pressing member 45, and the like.

The paper S placed on the paper placement table 35 of the reversing unit 30 is sandwiched between the transport rollers 38 and discharged from the opening opened by the swing of the positioning member 36 for positioning the rear end of the paper, and obliquely downward. Be transported. The sheets S are sequentially stored and stacked in the sheet bundle storage unit 40.
The sheet S descending from the reversing unit 30 stops with the leading end contacting the receiving plate and is supported.

  The sheets S sequentially discharged from the image forming apparatus A are switched back and conveyed in the reversing unit 30 and are collected in the sheet bundle accommodating unit 40. The stacked sheets S are subjected to vertical alignment and horizontal alignment by an alignment member, and a sheet bundle Sa composed of a plurality of sheets S is formed.

  The size of the sheet S and the number of sheets of the sheet bundle Sa, which are the booklet setting conditions, are set in the operation unit 9 of the image forming apparatus A shown in FIG. 1 or externally connected to the image forming apparatus A such as a personal computer. Set on the device.

  The pressing member 45 presses and sandwiches the sheet bundle Sa accumulated in the sheet bundle accommodating portion 40 in the thickness direction. When the set number of sheets S is stored in the sheet bundle storage unit 40, the pressing member 45 is operated by a driving unit (not shown), and the sheet bundle Sa is held between the support member 41 and the pressing member 45.

  The support member 41 and the pressing member 45 sandwiching the sheet bundle Sa are rotated together with the sheet bundle accommodating portion 40 by the motor M4, and the sheet bundle Sa is brought into an upright state.

  The adhesive application unit 50 drives the application roller 51 by the motor M1, and applies the adhesive to the lower surface of the sheet bundle Sa held in the upright state by the support member 41 and the pressing member 45.

  The cover sheet K, which is a cover sheet accommodated in the cover sheet supply unit 60, is separated and fed by the sheet feeding unit 62, is sandwiched between the conveyance rollers 63, 64, 65, and is conveyed to the booklet forming unit 80.

  A cutting unit 70 provided on the right side of a booklet forming unit 80 described later cuts the length in the conveyance direction of the cover sheet K to a predetermined length above the cover sheet supply unit 60.

  When the paper size, the number of sheets, and the paper thickness are selected or detected in the operation unit 9 or the external device of the image forming apparatus A, the control unit sets the length of the cover sheet K after cutting.

After receiving the cut cover K, the booklet forming unit 80 presses the cover K against the adhesive application surface formed on the lower surface of the sheet bundle Sa.
On the upper part of the booklet forming portion 80, a cover folding portion is provided. The front cover folding unit bends the front cover K along the side edge of the adhesive-coated surface of the paper bundle Sa, and sandwiches and holds the front cover and the back cover on the front and back surfaces of the paper bundle Sa. Thereby, the booklet Sb is formed.
When the booklet Sb is formed after the folding process of the cover sheet K is completed, the booklet forming unit 80 conveys the booklet Sb by the booklet discharge belt 88 and discharges it to the booklet storage device C.

  Next, a specific configuration of the perforation apparatus 300 in the present embodiment will be described with reference to FIGS.

  The punching device 300 includes a frame 301 as a container having a U-shaped cross section that extends in the left-right direction in the front view (the depth direction in FIGS. 1 and 3) and is bent so that the upper surface is open. Yes. Legs 303 are attached to the lower surface of the frame 301 via spacers 302. The spacer 302 is provided to form a gap Y through which the paper S can pass between the frame 301 and the leg portion 303. Here, the paper S that can pass through the gap Y is a thin paper such as plain paper, an OHP sheet, and a thick paper. In the present embodiment, paper or the like on which punch holes are made by the punching device 300 may be collectively referred to as a sheet.

  A base attachment portion 301 a is formed at the right end of the frame 301 when viewed from the front. The base attachment portion 301a has an L-shaped cross section by forming the back surface and the top surface by extending the back surface of the frame 301 to the right side and extending the extended portion upward and bending it forward. .

  Attachment bases 304a to 304d are attached to the base attachment portion 301a. The mounting base 304a is provided so as to hang down from the right end of the back surface of the base mounting portion 301a, and a drive motor 305 is attached to the mounting base 304a. The drive motor 305 is configured to be rotationally driven in both forward and reverse directions. For example, a DC motor with a brush is applied as the drive motor 305, but the drive motor 305 is not limited to this.

  The mounting base 304b is an L-shaped member having a front surface and a lower surface, and an upper end side of the front surface is bent rearward to form a flange. The attachment base 304b covers the open surface of the base attachment portion 301a by attaching the flange portion to the front end portion of the upper surface of the base attachment portion 301a. In other words, the base mounting portion 301a and the mounting base 304b form a cylindrical portion that is open on both the left and right sides.

  The mounting base 304c is bent in a box shape so that at least the front surface is opened, and is attached to the lower surface of the mounting base 304b. The drive motor 305 is disposed below the attachment base 304c, and the motor shaft of the drive motor 305 passes through the lower surface of the attachment base 304c.

  As shown in FIG. 4, a relay gear 306a and a driven gear 306b are accommodated on the inner surface side of the mounting base 304c, and are rotatably supported by the lower surface of the mounting base 304c and the lower surface of the mounting base 304b, respectively. Has been. The relay gear 306a and the driven gear 306b mesh with each other. A drive gear 305a is provided at the tip of the motor shaft of the drive motor 305 and meshes with the relay gear 306a.

  Further, as shown in FIG. 8, the driven gear 306b has a rotation shaft that penetrates from the lower surface of the mounting base 304b through a cylindrical portion formed by the base mounting portion 301a and the mounting base 304b, and It is supported by a flat mounting base 304d attached to the upper surface. A pinion gear 307 coaxial with the rotation shaft of the driven gear 306b is accommodated in the cylindrical portion.

  That is, according to the above-described configuration, when the drive motor 305 is driven and the drive gear 305a is rotated, the driven gear 306b is driven and rotated via the relay gear 306a. As the driven gear 306b rotates, the pinion gear 307 also rotates.

  On the other hand, as shown in FIG. 5, a flat lid member 308 extending in the left-right direction in front view is provided above the frame 301 so as to cover the upper surface of the opened frame 301.

  As shown in FIGS. 7 and 8, a pair of cam plates 309 and 310 as drive transmission members are accommodated inside the frame 301. The cam plates 309 and 310 are formed in a flat plate shape extending in parallel with the extending direction of the frame 301, and are arranged in parallel with a predetermined clearance with respect to the front surface or the back surface of the frame 301. Rack gears 309a and 310a are formed at the right ends of the cam plates 309 and 310, respectively, on the surfaces facing each other, and the rack gears 309a and 310a mesh with the pinion gear 307, respectively.

Since it is configured as described above, when the pinion gear 307 rotates in the CW direction in plan view, the cam plate 309 slides to the right and the cam plate 310 slides to the left. When the pinion gear 307 rotates in the CCW direction in plan view, the cam plate 309 slides to the left and the cam plate 310 slides to the right.
In the present embodiment, a drive unit is configured by the drive motor 305, the drive gear 305a, the relay gear 306a, the driven gear 306b, the pinion gear 307, and the rack gears 309a and 310a.

  Inside the frame 301, between the pair of cam plates 309 and 310, cylindrical guide pins 311a and 311b are erected at appropriate positions. The guide pins 311a and 311b are fixed by the lower surface of the frame 301 and the lid member 308. The guide pins 311a and 311b are provided so that a slight clearance is formed with respect to the cam plates 309 and 310. As a result, the cam plates 309 and 310 are guided by the inner surface of the front surface or the rear surface of the frame 301 and the guide pins 311a and 311b so as to reciprocate in a certain direction when sliding.

As shown in FIG. 8, four cam holes 312 to 315 are opened in the cam plate 309. The cam holes 312 and 315 are V-shaped portions 312a and 315a formed in a V-shape, and are away from the V-shaped portions 312a and 315a at both ends of the V-shaped portions 312a and 315a. The first straight portions 312b and 315b and the second straight portions 312c and 315c extending in the moving direction.
The cam holes 313 and 314 include V-shaped portions 313a and 314a formed in a V shape, and triangular portions 313d and 313d formed in an inverted triangle shape adjacent to the left side of the V-shaped portions 313a and 314a. 314d, extending in the moving direction of the cam plate 309, and connecting portions 313e, 314e connecting the left end of the V-shaped portions 313a, 314a and the right end of the triangular portions 313d, 314d, and the triangular portions 313d, 314d The first straight portions 313b and 314b extending in the moving direction of the cam plate 309 and the V-shaped portions 313a and 314a at the right ends of the V-shaped portions 313a and 314a are in the direction away from the triangular portions 313d and 314d at the left end. The second straight portions 313c and 314c extending in the moving direction of the cam plate 309. The first straight portions 312b to 315b have different lengths, and the second straight portions 312c to 315c have different lengths.

  Further, as shown in FIG. 7, the cam plate 310 has two cam holes 316 and 317. The cam holes 316 and 317 include V-shaped portions 316a and 317a formed in a V-shape, and triangular portions 316d and 317d formed in an inverted triangular shape adjacent to the left side of the V-shaped portions 316a and 317a. , Extending in the moving direction of the cam plate 310, connecting the left end of the V-shaped portions 316a, 317a and the right end of the triangular portions 316d, 317d, and the right end of the V-shaped portions 316a, 317a. The first straight portions 316b and 317b extending in the moving direction of the cam plate 310 and the left ends of the triangular portions 316d and 317d are separated from the triangular portions 316d and 317d. The second straight portions 316c and 317c extending in the moving direction of the cam plate 310. The first straight portions 316b and 317b have different lengths, and the second straight portions 316c and 317c have different lengths.

As shown in FIGS. 7 and 8, four cylindrical punch shafts 318 inside the frame 301 and between the pair of cam plates 309 and 310, the lower end surfaces of which are cut out in a V shape. ˜321 are arranged extending in the vertical direction. The punch shafts 318 to 321 are arranged at substantially equal intervals along the extending direction of the cam plates 309 and 310.
In the lower surface of the frame 301, insertion holes 301b to 301e through which the punch shafts 318 to 321 can pass are formed corresponding to the punch shafts 318 to 321, respectively.
On the other hand, the cover member 308 is also provided with insertion holes 308b to 308e through which the punch shafts 318 to 321 can pass, corresponding to the punch shafts 318 to 321, respectively.
As described above, the punch shafts 318 to 321 are supported by the insertion holes 301b to 301e and the insertion holes 308b to 308e so as to be vertically movable, respectively.
Further, die holes 303b to 303e through which the lower ends of the punch shafts 318 to 321 can pass are formed at positions facing the insertion holes 301b to 301e of the leg 303.
In the present embodiment, the punch shafts 318 to 321 can punch four holes in the paper S, and the punch shafts 319 and 320 can punch two holes in the paper S.

  Actuating pins 318a to 321a extending in the front-rear direction are provided through substantially the center of the punch shafts 318 to 321. Further, on the back surface of the frame 301, vertically long guide holes 301f to 301i corresponding to the operation pins 318a to 321a are formed. Further, on the front surface of the frame 301, vertically elongated guide holes 301j and 301k corresponding to the operation pins 319a and 320a are provided.

The operating pins 318a and 321a pass through the cam holes 312 and 315 of the cam plate 309, and the tips are provided through the guide holes 301f and 301i. When the punch shafts 318 and 321 move up and down, respectively. The guide holes 301f and 301i are guided and supported along the shape. The rear ends of the operating pins 318a and 321a are supported by punch shafts 318 and 321, respectively.
The operating pin 319a has one end penetrating the cam hole 313 of the cam plate 309 and the guide hole 301g, and the other end penetrating the cam hole 316 of the cam plate 310 and the guide hole 301j. When the punch shaft 319 moves up and down, it is guided and supported along the shape of the guide holes 301g and 301j.
The operating pin 320a has one end penetrating the cam hole 314 of the cam plate 309 and the guide hole 301h, and the other end penetrating the cam hole 317 of the cam plate 310 and the guide hole 301k. When the punch shaft 320 moves up and down, it is guided and supported along the shapes of the guide holes 301h and 301k.

  Since the present embodiment is configured as described above, when the cam plates 309 and 310 are slid, the operation pins 318a to 321a are guided according to the hole shapes of the cam holes 312 to 317, respectively, and the punch shaft 318 is provided. ˜321 can be moved in the vertical direction. That is, the cam plates 309 and 310 can displace the punch shafts 318 to 321 in a direction crossing the moving direction of the cam plates 309 and 310 in conjunction with the reciprocating motion in the extending direction.

  More specifically, when the drive motor 305 is driven to rotate the pinion gear 307 in the CCW direction in plan view, the cam plate 309 slides to the left, so that any of the operating pins 318a to 321a has a V-shaped portion. Guided downward according to the hole shapes 312a to 315a. Then, the punch shafts 318 to 321 to which the operation pins 318a to 321a are attached move as the operation pins 318a to 321a move downward. At this time, the cam plate 310 slides in the right direction, but none of the operating pins 318a to 321a passes through the V-shaped portions 316a and 317a of the cam plate 310, so that the cam plate 310 moves downward to the operating pins 318a to 321a. No guidance will be given. Further, when the operating pins 319a and 320a passing through the cam holes 316 and 317 of the cam plate 310 are guided downward by the V-shaped portions 313a and 314a of the cam holes 313 and 314 in the cam plate 309, respectively, they are triangular. Since the downward movement of the operating pins 319a and 320a is allowed by entering the shape portions 316d and 317d, the downward movement of the operating pins 319a and 320a is not interfered by the cam plate 310.

  When the punch shafts 318 to 321 move downward, the punch shafts 318 to 321 protrude downward from the insertion holes 301 b to 301 e of the frame 301, pass through the gap Y, and enter the die holes 303 b to 303 e of the leg 303. As a result, four punch holes can be formed in the paper S passing through the gap Y. More specifically, when the punch S 318 to 321 protrudes from the insertion holes 301b to 301e due to the downward movement of the punch shaft 318 to 321 when the paper S passes through the gap Y, the V shape of the punch shaft 318 to 321 is obtained. The lower end surface notched to press the surface of the paper S. When the punch shafts 318 to 321 are further moved downward, the punch holes having substantially the same diameter as the punch shafts 318 to 321 are formed in the paper S due to the shearing force generated by the lower end surfaces of the punch shafts 318 to 321 and the die holes 303b to 303e. Can be opened.

  At this time, the cam holes 312 to 315 are formed so that the timings at which the operating pins 318a to 321a reach the V-shaped portions 312a to 315a are shifted with respect to the moving direction of the cam plate 309. Therefore, the timing at which the lower end surfaces of the punch shafts 318 to 321 reach the paper S is different. When punch holes are made in the paper S by the punch shafts 318 to 321, a load against the pressure on the paper S is applied to the punch shafts 318 to 321. This load conducts the drive train including the cam plate 309. That is, the load generated in the punch shafts 318 to 321 is applied to the drive motor 305. In the present embodiment, as described above, by varying the arrival timing of the lower end surfaces of the punch shafts 318 to 321 to the paper S, it is possible to disperse the generation of loads and to smoothly perform the punching operation. Can be made to do.

  On the other hand, when the drive motor 305 is driven to rotate the pinion gear 307 in the CW direction in plan view, the cam plate 310 slides to the left, so that the operating pins 319a and 320a have the hole shapes of the V-shaped portions 316a and 317a. Will be guided downward. Then, among the punch shafts 318 to 321, the punch shafts 319 and 320 to which the operation pins 319 a and 320 a are attached move downward according to the downward operation of the operation pins 319 a and 320 a. At this time, the cam plate 309 slides to the right, but none of the operating pins 318a to 321a passes through the V-shaped portions 312a to 315a of the cam plate 309, so that the cam plate 309 moves downward to the operating pins 318a to 321a. No guidance will be given. Further, when the operating pins 319a and 320a passing through the cam holes 313 and 314 of the cam plate 309 are guided downward by the V-shaped portions 316a and 317a of the cam holes 316 and 317 in the cam plate 310, respectively, they are triangular. Since the downward movement of the operating pins 319a and 320a is allowed by entering the shape portions 313d and 314d, the downward movement of the operating pins 319a and 320a is not interfered with the cam plate 309.

  When the punch shafts 319 and 320 move downward, the punch shafts 319 and 320 protrude downward from the insertion holes 301c and 301d of the frame 301, pass through the gap Y, and enter the die holes 303c and 303d of the leg 303. As a result, two punch holes can be formed in the paper S passing through the gap Y. More specifically, when the punch S 319, 320 protrudes from the insertion holes 301c, 301d due to the downward movement of the punch shaft 319, 320 when the paper S passes through the gap Y, the V shape of the punch shaft 319, 320 is obtained. The lower end surface notched in the direction presses the surface of the paper S. When the punch shafts 319 and 320 are further moved downward, punch holes having substantially the same diameter as the punch shafts 319 and 320 are formed on the sheet S by the shearing force generated by the lower end surfaces of the punch shafts 319 and 320 and the die holes 303c and 303d. Can be opened.

  Note that cam holes 316 and 317 are also formed on the cam plate 310 so that the timings at which the lower end surfaces of the punch shafts 319 and 320 reach the paper S are different from the cam plate 309.

In the present embodiment, a columnar deflection preventing shaft 322 is located at an appropriate position between the punch shaft 321 and the pinion gear 307 inside the frame 301 and between the pair of cam plates 309 and 310. It is erected. More specifically, the deflection preventing shaft 322 is erected at a position that is substantially the center of the guide pin 311 b and the pinion gear 307. The deflection preventing shaft 322 is fixed by the lower surface of the frame 301 and the lid member 308. As shown in FIGS. 7 and 9, the deflection preventing shaft 322 is integrally provided with a semi-cylindrical protruding portion having a diameter smaller than the diameter of the main body portion of the deflection preventing shaft 322 in the direction facing the cam plates 309 and 310. ing. A slight clearance is formed by these protrusions and the cam plates 309 and 310. In this embodiment, since it is configured in this way, the contact area between the cam plates 309 and 310 and the anti-bending shaft 322 can be reduced, so that when the cam plates 309 and 310 slide, The sliding contact resistance generated by the plates 309 and 310 and the deflection preventing shaft 322 can be reduced, and a smooth drilling operation can be performed. In addition, the protrusion part may not be provided in the bending prevention axis | shaft, but what was simply formed in the column shape may be sufficient. Further, the shape of the deflection preventing shaft is not limited to a cylindrical shape, and may be other shapes such as a prismatic shape.
As will be described in detail later, the bending prevention shaft 322 includes cam plates 309 and 310 that are loaded from the punch shafts 318 to 321 and driving force from the drive motor 305 that is conducted through the pinion gear 307 and the rack gears 309a and 310a. When the cam plates 309 and 310 are bent, they come into contact with the cam plates 309 and 310 to prevent the cam plates 309 and 310 from bending beyond a certain level.
Note that the number of the bending prevention shafts may be one or plural, the position where the cam plates 309 and 310 are bent, the sliding contact resistance between the cam plates 309 and 310 and the bending prevention shaft, and the like. It is preferable to set appropriately considering the above.

  Next, a drilling operation by the drilling apparatus 300 configured as described above will be described with reference to FIGS. 10 to 12 show the front portion of the frame 301 with a part thereof broken and the description of the cam plate 310 omitted for easy explanation. Further, the punching apparatus 300 according to the present embodiment uses the position shown in FIG. 10 as a reference position, for example, when the sheet S is fed into the gap Y and stopped at a predetermined position in any direction. On the other hand, four or two punch holes can be formed in the paper S by causing the cam plates 309 and 310 to perform one reciprocal sliding movement. 10 to 12, an operation of punching four holes in the paper S by rotating the pinion gear 307 in the CCW direction in plan view and sliding the cam plates 309 and 310 will be described. Here, in FIGS. 10 to 12, an arrow L indicates a sliding movement direction of the cam plate 309. Here, the operation of the cam plate 309 will be described, and the description of the operation of the cam plate 310 will be omitted.

  As shown in FIG. 10, the punch shafts 318 to 321 are all located on the left side of the V-shaped portions 312 a to 315 a of the cam plate 309 at the reference position. However, the distances from the punch shafts 318 to 321 to the V-shaped portions 312a to 315a are slightly different from each other.

  When the drive motor 305 is driven and the pinion gear 307 rotates in the CCW direction in plan view, the cam plate 309 slides in the arrow L direction as shown in FIG. Then, the operating pin 319a of the punch shaft 319 among the punch shafts 318 to 321 is first guided downward by the V-shaped portion 313a. That is, among the punch shafts 318 to 321, the punch shaft 319 first moves downward. As described above, when the punch shaft 319 passes through the gap Y and enters the die hole 303c of the leg 303, a punch hole is formed in the paper S passing through the position.

When the cam plate 309 further slides, the operation pin 320a of the punch shaft 320 is subsequently guided downward by the V-shaped portion 314a. As described above, when the punch shaft 320 passes through the gap Y and enters the die hole 303d of the leg 303, a punch hole is opened in the paper S passing through the position.
Thereafter, the above-described operation is performed in the order of the punch shaft 318 and the punch shaft 321, and punch holes are sequentially formed in the paper S.
The order in which the punch shaft moves downward is not limited to that described above, and can be set as appropriate.

  When the cam plate 309 further slides in the direction of the arrow L, as shown in FIG. 12, the punch shafts 318 to 321 are moved along the shapes of the V-shaped portions 312a to 315a, the punch shaft 319, the punch shaft 320, The punch shaft 318 and the punch shaft 321 rise in this order. Thereafter, the operation pins 318a to 321a enter the second linear portions 312c to 315c, respectively, and the drilling operation is completed.

  When the paper S with punch holes is discharged from the gap Y and the next paper S to be transported is fed into the gap Y, the punch shafts 318 to 321 positioned at the second linear portions 312c to 315c are the reference positions. The punch hole can be punched in the sheet S in the same manner by sliding the cam plate 309 in the direction opposite to the arrow L direction.

  In the punching device 300 according to the present embodiment, punching is performed on a plurality of stacked sheets or thick paper. In such a case, as shown in FIG. 13, the driving force by the driving motor 305 increases, and the load in punching the paper of the punch shafts 318 to 321 also increases, and this load is applied to the cam plate 309 in the direction of arrow P1. . On the other hand, the driving force from the driving motor 305 is also applied to the cam plate 309 in the direction of arrow P2. When such a load and driving force exceed a certain amount, the properties of the cam plate 309 cannot be maintained, and as indicated by the provisional lines B1 and B2, the cam plate 309 is easily bent or bent inward or outward. Bending in the direction occurs. Then, the driving force from the driving motor 305 is dispersed due to the bending of the cam plate 309, and a sufficient driving force cannot be transmitted to the punch shafts 318 to 321. That is, an unnecessarily large driving force is required to punch holes in the paper, and the energy efficiency of the driving motor 305 is reduced. Further, when the cam plate 309 is greatly bent, there may be a case where punch holes cannot be formed in the sheet by the punch shafts 318 to 321. Alternatively, an overload may occur in the drive motor 305 and the drilling operation may be stopped. A similar phenomenon can occur with the cam plate 310.

  In the present embodiment, as described above, the anti-bending shaft 322 is provided, and when the cam plates 309 and 310 are bent by a predetermined amount in the inner direction, they are brought into contact with the inner side surfaces of the cam plates 309 and 310. The bending of the cam plates 309 and 310 is suppressed, and the driving force from the driving motor 305 is efficiently transmitted to the punch shafts 318 to 321. Here, it is preferable to apply a drive motor 305 having a driving force necessary to withstand the load from the punch shafts 318 to 321.

  Further, the arrangement position of the deflection preventing shaft 322 can be set as appropriate as long as the cam plate 309, 310 is capable of suppressing a certain amount of bending. For example, as a result of simulation, it is preferable to provide the anti-bending shaft 322 at a position where the cam plates 309 and 310 are in contact with the most bulging portion when the cam plates 309 and 310 are bent.

  In the present embodiment, when the cam plates 309 and 310 are bent outward, the cam plates 309 and 310 are prevented from bending by being brought into contact with the inner surface of the frame 301.

  Thus, in this Embodiment, the 1st bending suppression part is comprised by the bending prevention axis | shaft 322. FIG. In the present embodiment, the frame 301 constitutes a second bending suppression part. Of course, the bending prevention shaft 322 may constitute the second bending suppression part, and the frame 301 may constitute the second bending suppression part.

  In this embodiment, the shape of the guide pins 311a and 311b is the same as that of the anti-bending shaft 322. In addition to the function of the guide when the cam plates 309 and 310 are slid, the function of the bending suppressing portion is provided. Have. That is, the guide pins 311a and 311b are in contact with each other when the cam plates 309 and 310 are bent by a predetermined amount so as to suppress the bending of the cam plates 309 and 310. The guide pins 311a and 311b are not limited to the configuration described above, and may not have the function of a bending suppression unit.

  As described above, according to the present embodiment, the punch shafts 318 to 321 are supported so as to be able to reciprocate and punch holes in the paper S. The cam plates 309 and 310 engage with the punch shafts 318 to 321, extend in a direction intersecting the moving direction of the punch shafts 318 to 321, and are provided so as to reciprocate in the extending direction. The punch shafts 318 to 321 are displaced in conjunction with the movement. The driving motor 305, the driving gear 305a, the relay gear 306a, the driven gear 306b, the pinion gear 307, and the rack gears 309a and 310a are driven by the driving motor 305 at the driving force application position on one end side in the extending direction of the cam plates 309 and 310. To reciprocate the cam plates 309 and 310. When the cam plate 309, 310 is bent when the load from the punch shaft 318 to 321 and the driving force of the drive motor 305 are applied to the cam plate 309, 310, the deflection preventing shaft 322 and the frame 301 are bent. It abuts on 310 and suppresses bending of the cam plates 309 and 310. As a result, even when punching multiple sheets or sheets with a large punching load such as cardboard, loss of driving force can be suppressed, and the driving force of the drive source can be efficiently transmitted to the punch shaft. can do. Moreover, it can implement | achieve by reducing a number of parts, and can suppress the raise in cost. Moreover, since it can implement | achieve with a small-sized structure, the enlargement of an apparatus can be suppressed.

  Further, according to the present embodiment, the bending prevention shaft 322 contacts the cam plates 309 and 310 when the cam plates 309 and 310 are bent in the first direction. The frame 301 contacts the cam plates 309 and 310 when the cam plates 309 and 310 are bent in the second direction opposite to the first direction. As a result, even if the cam plate is bent in any direction, this can be suppressed, and the driving force of the driving source can be efficiently transmitted to the punch shaft.

  In addition, according to the present embodiment, the frame 301 is a box formed to extend in the extending direction of the cam plates 309 and 310, and accommodates the cam plates 309 and 310 and the punch shafts 318 to 321. In addition, insertion holes 301b to 301e through which the punch shafts 318 to 321 are inserted so as to be able to advance and retreat are provided on a surface that intersects the moving direction of the punch shafts 318 to 321. As a result, the cam plate and the frame that accommodates the punch shaft can suppress the bending of the cam plate, thereby suppressing an increase in the number of parts.

  Further, in the present embodiment, the deflection preventing shaft 322 and the frame 301 are configured such that the cam plate 309 at the position where the cam plates 309 and 310 bulge most in the bending direction when the cam plates 309 and 310 are bent by a predetermined amount. , 310 can be effectively suppressed from bending of the cam plate, and loss of driving force can be further reduced.

  Further, in the present embodiment, the deflection preventing shaft 322 extends in a direction intersecting with the extending direction of the cam plates 309 and 310 and is arranged close to the cam plates 309 and 310 to form a columnar shape. When the cam plate and the deflection preventing shaft are in sliding contact with each other, the resistance can be reduced, and the loss of driving force can be further reduced.

  Further, in this embodiment, since the deflection preventing shaft 322 is formed in a columnar shape, the contact area between the cam plate and the deflection preventing shaft is reduced, and the sliding resistance can be further reduced.

  Further, in this embodiment, the deflection preventing shaft 322 has a protruding portion that protrudes toward the cam plates 309 and 310 from a position facing the cam plates 309 and 310 of the main body portion and has a smaller diameter than the main body portion. Therefore, the contact area between the cam plate and the deflection preventing shaft can be further reduced.

  The description in the embodiment of the present invention is an example of a punching device according to the present invention, a post-processing device including the punching device, and an image forming system including the post-processing device, and is not limited thereto. It is not a thing. The detailed configuration and detailed operation of each functional unit constituting the punching device, the post-processing device, and the image forming system can be appropriately changed.

In the present embodiment, the columnar deflection preventing shaft 322 is provided between the cam plates 309 and 310. However, the deflection preventing shaft may be configured according to other modes.
For example, an anti-bending shaft 322A shown in FIG. 14 is configured such that an end surface having a major axis and a minor axis is an oval shape, and a columnar body portion 322Aa is pivotally supported by a pivot shaft 322Ab. . According to such a configuration, even if there is a difference in the clearance between the cam plates 309 and 310 and the deflection preventing shaft 322A for each product due to component tolerances or the like that occur in the manufacturing process, the optimum clearance can be adjusted. The mechanism for adjusting the clearance between the cam plate and the deflection preventing shaft is not limited to the one described above. For example, the clearance adjustment may be performed by sliding the deflection preventing shaft along the guide groove or the like. Good.

  That is, according to the present embodiment, the deflection preventing shaft 322A can change the distance from the cam plates 309 and 310.

  Further, according to the present embodiment, the deflection preventing shaft 322A is formed in a columnar shape including an end surface having a major axis and a minor axis, and is provided rotatably with the extending direction as a supporting shaft. The distance between the deflection preventing shaft 322A and the cam plates 309 and 310 can be changed by rotating the 322A. As a result, the clearance can be adjusted with a simple configuration.

  Further, for example, the deflection preventing shaft 322B shown in FIG. 15 has a cylindrical main body portion 322Ba formed by hollowing out the center of the column, and the main body portion 322Ba supports the rotational shaft 322Bb. As shown in FIG. According to such a configuration, even if the cam plates 309 and 310 slide and move, even if they come into contact with the deflection preventing shaft 322B, the body portion 322Ba of the deflection preventing shaft 322B rotates following this, so the cam plates 309 and 310 Slidable contact resistance with the deflection preventing shaft 322B can be reduced. At this time, for example, if the surface of the main body 322Ba has a gripping force, the sliding resistance can be further reduced. The bending prevention shaft 322B is configured such that the main body portion 322Ba is formed in a cylindrical shape and the rotation shaft 322Bb penetrates the main body portion 322Ba. However, the shape of the main body portion 322Ba is not limited to the cylindrical shape, for example, the center of a column. Even if it is the structure which supports an end surface rotatably as a thing which is not hollow, it can be made to function similarly.

  That is, according to the present embodiment, the deflection preventing shaft 322B is supported so as to be able to rotate following the sliding contact with the cam plates 309 and 310 with the extending direction as a support shaft at the center of the columnar shape.

  For example, as shown in FIG. 16, instead of the deflection preventing shaft 322, a bulging portion 309b bulged in a semicircular shape toward the cam plate 310 is formed on a part of the inner surface side of the cam plate 309. A predetermined clearance may be provided by the bulging portion 309b and the inner surface side of the cam plate 310. In this case, the cam plate 310 functions as a bending suppression unit. According to such a configuration, it is possible to reduce the number of parts necessary for suppressing the bending of the cam plates 309 and 310, so that the cost can be reduced. Note that the bulging portion may be formed on the cam plate 310. In addition, the shape of the bulging portion may be extended vertically or may be extended horizontally. Further, the bulging portion may be formed in a hemispherical shape.

  That is, according to the present embodiment, the bulging portion 309b is formed by bulging in the bending direction from the cam plate 309, and the bulging portion 309b is formed when the cam plate 310 is bent. Abut.

  In addition, for example, as shown in FIG. 17, square plate-like wall portions 322 </ b> Ca to 322 </ b> Ce are erected between the cam plates 309 and 310 instead of the deflection preventing shaft 322, and the cam plates 309 and 310, A predetermined clearance may be provided by the portions 322Ca to 322Ce. The wall portions 322Ca to 322Ce shown in FIG. 17 are provided so that the outer surfaces thereof face almost the entire inner surfaces of the cam plates 309 and 310, avoiding the punch shafts 318 to 321. FIG. 17 is a perspective view of the perforation apparatus 300 cut along the AA cross section in FIG. In this case, the deflection preventing shaft 322 is replaced with wall portions 322Ca to 322Ce. According to such a configuration, it is possible to suppress the bending of the cam plates 309 and 310 and to guide the moving direction in the sliding movement of the cam plates 309 and 310. Note that the length and the arrangement position of the wall can be appropriately set in consideration of the position where the cam plates 309 and 310 are bent, the functionality of the guide, and the like. The wall portions 322Ca to 322Ce may be, for example, a mode in which a flat plate member formed of resin is fixed to the frame 301, or the wall portions 322Ca to 322Ce are provided integrally by bending the frame 301. Also good.

  That is, according to the present embodiment, the wall portions 322Ca to 322Ce formed in a flat plate shape come into contact with the cam plates 309 and 310 on the outer surface.

  In this embodiment, the rotational driving force of the drive motor 305 is converted to linear drive by the pinion gear 307 and the rack gears 309a and 310a and transmitted to the cam plates 309 and 310. For example, an actuator such as a solenoid is used. It is also possible to generate a linear driving force by transmitting the linear driving force to the cam plates 309 and 310 and to slide the cam plates 309 and 310.

  Moreover, in this Embodiment, although comprised by a pair of cam board 309,310, it may be comprised by one cam board.

1000 Image forming system A Image forming apparatus B Bookbinding apparatus 300 Punching apparatus 301 Frame (container / second bending suppression unit)
305 Drive motor (drive unit / drive source)
305a Drive gear (drive unit)
306a Relay gear (drive unit)
306b Driven gear (drive unit)
307 Pinion gear (drive unit)
309, 310 Cam plate (power transmission member)
309a, 310a Rack gear (drive unit)
318, 319, 320, 321 Punch shafts 318a, 318b, 318c, 318d Actuation pin 322 Deflection prevention shaft (first bend suppressing portion)
322A Bending prevention shaft (first bending suppressing portion)
322B Bending prevention shaft (first bending suppressing portion)
322Ca to 322Ce wall portion (first bending suppression portion)

Claims (15)

A punch shaft that is supported so as to be reciprocally movable and opens a hole in the sheet;
The punch shaft engages with the punch shaft, extends in a direction intersecting the movement direction of the punch shaft, is provided so as to be able to reciprocate in the extending direction, and displaces the punch shaft in conjunction with the reciprocation. A driving force transmission member;
A drive unit that reciprocates the drive force transmission member by applying a drive force of a drive source at a drive force application position on one end side in the extending direction of the drive force transmission member;
When the load from the punch shaft and the driving force of the driving source are applied to the driving force transmitting member and the driving force transmitting member is bent, the driving force transmitting member comes into contact with the driving force transmitting member. A bending suppression portion for suppressing bending;
A perforating apparatus comprising:   The bending suppression portion includes a first bending suppression portion that comes into contact with the drive transmission member when the driving force transmission member is bent in the first direction, and the driving force transmission member is in the first direction. The punching device according to claim 1, further comprising: a second bending suppression portion that comes into contact with the drive transmission member when bent in a second direction opposite to the first direction. A box formed extending in the extending direction of the driving force transmission member, which accommodates the driving force transmission member and the punch shaft, and has the punch shaft on a surface intersecting the moving direction of the punch shaft Including a receiving body provided with an insertion hole through which it can be advanced and retracted,
The perforation apparatus according to claim 2, wherein an inner surface of the container functions as the second bending suppression unit.   The bending suppression portion is in contact with the driving force transmission member at a position where the driving force transmission member bulges most in a bending direction of the driving force transmission member when the driving force transmission member is bent by a predetermined amount. The perforation apparatus as described in any one of Claims 1-3.   The said bending suppression part is extended in the direction which cross | intersects the extension direction of the said driving force transmission member, and contains the columnar bending suppression member arrange | positioned in proximity to the said driving force transmission member. Item 5. The punching device according to any one of Items 1 to 4.   The perforation apparatus according to claim 5, wherein the bending suppression member is formed in a columnar shape.   The perforation apparatus according to claim 5 or 6, wherein the bending suppression member can change a distance from the driving force transmission member.   The bending suppression member is formed in a columnar shape including an end surface having a major axis and a minor axis, and is provided to be rotatable with an extending direction as a supporting shaft, and the bending suppression member is rotated to rotate the bending. The perforating apparatus according to claim 7, wherein a distance between the bending suppressing member and the driving force transmitting member can be changed.   The bending suppressing member has a main body portion and a protruding portion that protrudes toward the driving force transmitting member from a position facing the driving force transmitting member of the main body portion and has a smaller diameter than the main body portion. The perforating apparatus according to any one of claims 5 to 7, wherein   The said bending suppression member is supported so that it can rotate following a sliding contact with the said driving force transmission member by making the extending direction into a spindle in the said column-shaped center. The drilling device described.   The perforating apparatus according to claim 3, wherein the first bending suppression portion is formed in a flat plate shape and abuts on the driving force transmission member on an outer surface. A bulging portion is formed by bulging in the direction of bending from the driving force transmitting member,
The said bending suppression part contact | abuts with the said bulging part when the said driving force transmission member bends, The perforation apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.   9. A post-processing apparatus comprising a connection portion between the punching apparatus according to claim 1 and an image forming apparatus.   The post-processing apparatus according to claim 9, further comprising a booklet creation unit that receives a sheet on which an image is formed and produces a booklet. An image forming apparatus for forming an image on a sheet;
15. An image forming system comprising: a post-processing device according to claim 13 or 14, which receives a sheet on which an image is formed by the image forming device and performs post-processing on the sheet.

Images