JP2018177427A - Binding processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology in which the paper constituting a bound paper bundle can be difficult to be peeled off from the paper bundle.SOLUTION: A binding processing device includes: a stapler that binds a paper bundle using a needle; a needleless binding unit that binds the paper bundle without using a needle; and exit rolls 333 that exit the bound paper bundle. A length of a needleless binding portion 550 bound by the needleless binding unit is longer than a length of a needle binding portion 410 bound by the stapler, and the needle binding portion 410 and the needleless binding portion 550 are formed at positions not to be pressed by the exit rolls 333.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a binding processing apparatus.

Conventionally, there has been proposed a binding processing device for binding a sheet bundle without using staples.
For example, in the processing apparatus described in Patent Document 1, a folding knife and a folding roll fold a sheet bundle stacked in a compilation tray in which a plurality of sheets are stacked in order. And a process of binding the sheet bundle by causing the binding mechanism section to deform the sheet bundle in the thickness direction at a position separated by a predetermined distance from the folding position of the sheet bundle by the folding knife and the folding roll. I do.

JP, 2011-201698, A

For example, when a binding unit in a sheet bundle that has been bound without using staples is pressed by a roll that transports the sheet bundle, the binding unit may be loosened. Then, when the binding portion is loosened, for example, when the sheets constituting the sheet bundle are turned, the turned sheets are easily peeled from the sheet bundle.
An object of the present invention is to provide a binding processing apparatus capable of making it difficult to peel sheets forming a bound sheet bundle from the sheet bundle.

The invention according to claim 1 comprises a needle binding means for binding a sheet bundle using a needle, a needleless binding means for binding a sheet bundle without using a needle, and a discharge roll for discharging the bound sheet bundle. And the length of the stapleless binding section stapled by the stapleless binding means is longer than the length of the staple binding section stapled by the staple binding section, and the staple binding section and the stapleless binding section This binding processing device is formed at a position where it is not pressed by the discharge roll.
The invention according to claim 2 is that the distance between the needleless binding section and the end of the discharge roll is equal to or greater than the distance between the needle binding section and the end of the discharge roll. It is a binding processing apparatus of a statement.
In the invention according to claim 3, in the needle binding means and the needleless binding means, one direction from the center of the sheet bundle in the orthogonal direction to the orthogonal direction orthogonal to the discharge direction by the discharge roll The average distance from the end of the discharge roll to the plurality of needleless bindings is equal to or greater than the average distance from the end of the discharge roll to the plurality of staples. It is a binding processing device according to item 1 or 2.
The invention according to claim 4 is characterized in that the distance between the needleless binding section and the center of the sheet bundle in the direction orthogonal to the discharge direction by the discharge roll is equal to or greater than the distance between the needle binding section and the center The binding processing device according to claim 1, wherein
In the invention according to claim 5, in the needle binding means and the needleless binding means, one direction of the orthogonal direction from the center of the orthogonal direction of the sheet bundle in the orthogonal direction orthogonal to the discharge direction by the discharge roll 5. The binding according to claim 1 or 4, wherein a plurality of binding portions are formed, and an average distance from the center to the plurality of needleless binding portions is equal to or more than an average distance from the center to the plurality of needle binding portions. It is a processing device.
In the invention according to claim 6, the distance between the needleless binding section and the centers of the plurality of rolls of the discharge roll is equal to or greater than the distance between the needle binding section and the center. It is a binding processing apparatus as described in these.
In the invention according to claim 7, in the needle binding means and the needleless binding means, the direction from the center of the sheet bundle in the orthogonal direction to the orthogonal direction orthogonal to the discharge direction by the discharge roll is one direction in the orthogonal direction The average distance from the center of the plurality of rolls of the discharge roll to the plurality of needleless binding sections is equal to or greater than the average distance from the center to the plurality of needle binding sections. It is a binding processing device according to item 1 or 6.
In the invention according to claim 8, the staple binding means and the stapleless binding means perform a binding process on two places of a sheet bundle, and the distance between the two stapleless binding parts is two of the needles The binding processing device according to claim 1, wherein the distance is equal to or more than the distance between the binding portions.
In the invention according to claim 9, in the needle binding means and the needleless binding means, one direction from the center of the sheet bundle in the orthogonal direction to the orthogonal direction orthogonal to the discharge direction by the discharge roll. The plurality of binding portions are formed in each of the plurality of needleless binding portions, and the distance between the central two points of the plurality of needleless binding portions is equal to or greater than the distance between the central two points in the plurality of needle binding portions. Binding processing device.
The invention according to claim 10 is the binding according to any one of claims 3, 5, 7 or 9, wherein the sum of the lengths of the plurality of needleless binding parts is larger than the sum of the lengths of the plurality of needle binding parts. It is a processing device.

According to the first aspect of the present invention, for example, compared with a configuration in which the staple-less binding unit is pressed by the discharge roll, it is possible to make it difficult to separate the sheets constituting the bound sheet bundle from the sheet bundle.
According to the invention of claim 2, even if the length of the stapleless binding section is longer than the length of the staple binding section, it is possible to form the stapleless binding section at a position where it is not pressed by the discharge roll with higher accuracy. .
According to the invention of claim 3, even if the length of the stapleless binding portion is longer than the length of the staple binding portion and a plurality of binding portions are formed in one direction from the center of the sheet bundle, the accuracy is higher. The needleless binding portion can be formed at a position where it is not pressed by the discharge roll.
According to the invention of claim 4, even if the length of the stapleless binding section is longer than the length of the staple binding section, the stapleless binding section can be formed at a position where it is not pressed by the discharge roll with higher accuracy. .
According to the invention of claim 5, even if the length of the stapleless binding section is longer than the length of the staple binding section and a plurality of binding sections are formed in one direction from the center of the sheet bundle, the accuracy is higher. The needleless binding portion can be formed at a position where it is not pressed by the discharge roll.
According to the invention of claim 6, even if the length of the stapleless binding section is longer than the length of the staple binding section, the stapleless binding section can be formed at a position where it is not pressed by the discharge roll with higher accuracy. .
According to the invention of claim 7, even if the length of the stapleless binding section is longer than the length of the staple binding section and a plurality of binding sections are formed in one direction from the center of the sheet bundle, the accuracy is higher. The needleless binding portion can be formed at a position where it is not pressed by the discharge roll.
According to the invention of claim 8, even if the length of the stapleless binding section is longer than the length of the staple binding section, it is possible to form the stapleless binding section at a position where it is not pressed by the discharge roll with higher accuracy. .
According to the invention of claim 9, even if the length of the stapleless binding section is longer than the length of the staple binding section and a plurality of binding sections are formed in one direction from the center of the sheet bundle, the accuracy is higher. The needleless binding portion can be formed at a position where it is not pressed by the discharge roll.
According to the tenth aspect of the present invention, it is possible to make it difficult for the sheets constituting the bound sheet bundle to be peeled off from the sheet bundle, as compared with a configuration in which, for example, the needleless binding section is pressed by the discharge roll.

FIG. 1 is a diagram showing a schematic configuration of a sheet processing system to which a binding processing device according to the present embodiment is applied. It is a figure showing a schematic structure of a binding processing device. It is the figure which looked at the binding processing apparatus from III direction of FIG. It is a figure which shows schematic structure of a needle-less binding apparatus. (A) is a state before binding a sheet bundle, (b) is a view showing a state when binding a sheet bundle. It is a figure which shows the 1st crimping member and 2nd crimping member of a needle-less binding apparatus. (A) is a perspective view of a 1st crimping member and a 2nd crimping member. (B) is the figure seen from the Vb direction of (a), (c) is the figure seen from the Vc direction of (b). (A) is a figure which compares a staple binding part and a staple-less binding part. (B) is a figure which shows the range of a needle-less binding part. It is a figure which shows the position of a needle binding part and a needle-less binding part. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. FIG. 7 is a diagram showing the positions of a needle binding unit and a needleless binding unit when forming a plurality of needle binding units and a needleless binding unit in one direction and the other direction in the width direction from the center position of the sheet bundle. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. It is a figure which shows the 1st modification of the position of a needle binding part and a needle-less binding part. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. The first modified example of the positions of the needle binding portion and the needleless binding portion when forming a plurality of needle binding portions and needleless binding portions in one direction and the other direction in the width direction from the center position of the sheet bundle is shown. FIG. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. It is a figure which shows the 2nd modification of the position of a needle binding part and a needle-less binding part. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. A second modified example of the positions of the needle binding portion and the needleless binding portion in the case of forming a plurality of needle binding portions and needleless binding portions in one direction and the other direction in the width direction from the center position of the sheet bundle FIG. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part. A third modification of the positions of the needle binding portion and the needleless binding portion in the case of forming a plurality of needle binding portions and needleless binding portions in one direction and the other direction in the width direction from the center position of the sheet bundle FIG. (A) is a figure which shows the position of a needle binding part, (b) is a figure which shows the position of a needle-less binding part.

Hereinafter, embodiments will be described in detail with reference to the attached drawings.
FIG. 1 is a view showing a schematic configuration of a sheet processing system 1 to which a binding processing apparatus 300 according to the present embodiment is applied.
The sheet processing system 1 includes an image forming apparatus 2 that forms an image on a sheet P using an electrophotographic method or the like, and a plurality of sheets P on which an image is formed by the image forming apparatus 2. And a post-processing device 3 for performing processing.

(Image forming device)
The image forming apparatus 2 is configured in a so-called tandem system, and includes four image forming units 100Y, 100M, 100C, and 100K (also collectively referred to as "image forming units 100") for forming an image based on each color image data. Each image forming unit 100 has a photosensitive drum 100a.
The image forming apparatus 2 further includes a laser exposure device 101 that exposes the photosensitive drum 100 a provided in each image forming unit 100 and forms an electrostatic latent image on the surface of the photosensitive drum 100 a.

  The image forming apparatus 2 further includes an intermediate transfer belt 102 on which the toner images of the respective colors formed by the respective image forming units 100 are transferred in a multiple manner, and the respective color toner images formed by the respective image forming units 100 as the intermediate transfer belt. And a primary transfer roll 103 for sequentially transferring (primary transfer) to 102. The image forming apparatus 2 further includes a secondary transfer roll 104 for collectively transferring (secondary transfer) the color toner images transferred onto the intermediate transfer belt 102 onto the sheet P.

The image forming apparatus 2 further includes a fixing device 105 that fixes the secondary-transferred toner images on the sheet P, and a main control unit 106 that controls the operation of the image forming apparatus 2.
The image forming apparatus 2 also includes a plurality of sheet storage units 110a to 110d for storing sheets P of different sizes and different types, a pickup roll 111 for removing the sheets P from the sheet storage units 110a to 110d, and the removed sheets P. A conveyance roll 112 for conveyance and a resist roll 113 disposed between the conveyance roll 112 and the secondary transfer roll 104 are provided.

In the image forming apparatus 2 configured as described above, each color toner image on the intermediate transfer belt 102 is conveyed to the opposing portion (secondary transfer portion) where the secondary transfer roll 104 and the intermediate transfer belt 102 face each other. The sheet P is supplied from the resist roll 113 to the secondary transfer unit in accordance with the timing.
Then, the color toner images on the intermediate transfer belt 102 are collectively electrostatically transferred (secondary transfer) onto the sheet P by the action of the transfer electric field formed by the secondary transfer roll 104.

Thereafter, the sheet P on which each color toner image has been transferred is separated from the intermediate transfer belt 102 and conveyed to the fixing device 105. In the fixing device 105, the toner images of the respective colors are fixed on the sheet P by the fixing process using heat and pressure, and an image is formed on the sheet P.
Then, the sheet P on which the image is formed is discharged from the sheet discharge unit T of the image forming apparatus 2 by the transport roll 114 and is supplied to the post-processing apparatus 3 connected to the image forming apparatus 2.

(Post-processing device)
The post-processing apparatus 3 has a transport unit 31 connected to the sheet discharge unit T of the image forming apparatus 2 and a finisher unit 32 that performs predetermined processing on the sheet P conveyed by the transport unit 31. Equipped with
The transport unit 31 has a punch function unit 31 a for performing punching (punching) such as 2 holes and 4 holes, and a plurality of sheets P for conveying the sheet P after the image is formed by the image forming apparatus 2 toward the finisher unit 32. And a transport roll 31b.
The finisher unit 32 includes a binding processing device 300 that performs binding processing on a sheet bundle B composed of a plurality of sheets P. The binding processing device 300 will be described in detail later.

In addition, the post-processing device 3 includes a sheet processing control unit 33 that controls each mechanical unit of the post-processing device 3. The sheet processing control unit 33 has an arithmetic logic operation circuit including a CPU, a ROM, a RAM, a backup RAM, etc. For example, sizes and positions of a staple binding unit 410 and a stapleless binding unit 550 described later are in an aspect described later. In this way, the binding processing device 300 is controlled. The sheet processing control unit 33 is connected to the main control unit 106 via a signal line (not shown), and mutually transmits and receives control signals and the like. Although FIG. 1 shows an example in which the sheet processing control unit 33 is provided in the case of the finisher unit 32, the sheet processing control unit 33 may be provided in the case of the image forming apparatus 2. . In addition, the main body control unit 106 of the image forming apparatus 2 may be configured to include the control function of the sheet processing control unit 33.
The post-processing device 3 also includes a stacker unit 34 that stacks the sheet bundle B for which the processing by the post-processing device 3 has been completed.

{Binding processing device}
FIG. 2 is a view showing a schematic configuration of the binding processing apparatus 300. As shown in FIG.
FIG. 3 is a view of the binding processing device as viewed in the direction III in FIG.
The binding processing device 300 supports a sheet P from below and stacks the required number of sheets P to generate a sheet bundle B, and a binding unit 320 that performs a binding process on the sheet bundle B; A rail 325 and a support shaft 326 which movably support the binding unit 320 are provided.
The binding processing apparatus 300 further includes a discharge unit 330 that rotates in the clockwise direction in FIG. 2 and discharges the sheet bundle B on the sheet stacking unit 310 to the stacker unit 34.
Further, the binding processing apparatus 300 further includes a paddle 340 for moving the sheet P toward a sheet regulating unit 312, which will be described later, provided at an end of the sheet stacking unit 310, and a tamper that aligns the end along the traveling direction of the sheet P. And 350.

The sheet stacking unit 310 has a top surface on which the sheet P is loaded, and is provided at a bottom portion 311 disposed obliquely with respect to the vertical direction, and a bottom surface provided at the bottom end surface of the bottom portion 311 And a regulation unit 312.
The binding unit 320 will be described in detail later.

  The discharge unit 330 includes a fixed-side discharge member 331 provided rotatably with respect to the device housing. Further, the discharge unit 330 is provided so as to be able to swing around the rotation shaft 332 a (see FIG. 1), and when the generated sheet bundle B is sent to the stacker unit 34, the sheet bundle B on the sheet stacking unit 310 is And a moving side discharge member 332 for retracting the sheet P from the conveyance path of the sheet P when the sheet P is stacked on the sheet stacking unit 310.

The fixed side discharge member 331 has two fixed side discharge rolls 331a which are members for pressing the sheet bundle B, and a fixed side roll support member 331b which supports the two fixed side discharge rolls 331a.
The moving side discharge member 332 has two moving side discharge rolls 332a, which are members for pressing the sheet bundle B, and a moving side roll supporting member 332b that supports the two moving side discharge rolls 332a.
The fixed side discharge member 331 and the movable side discharge member 332 are disposed to face each other on the upper side and the lower side of the bottom portion 311 of the sheet stacking unit 310 with the bottom portion 311 interposed therebetween. The sheet bundle B is discharged to the stacker unit 34 by pressing with the transfer side discharge roll 332 a. The fixed side discharge roll 331a and the moving side discharge roll 332a are the same members, and it can be illustrated that the size of the sheet bundle B in the width direction is the same. Below, a pair of rolls comprised from the stationary side discharge roll 331a and the movement side discharge roll 332a which oppose is called "the discharge roll 333."

  The moving side discharge member 332 is provided on the upper surface side of the bottom portion 311 of the sheet stacking unit 310 on which the sheets P are stacked. Furthermore, the moving side discharge member 332 is provided so as to be able to move forward and backward with respect to the fixed side discharge member 331 under the drive of a motor or the like (not shown). That is, the distance between the moving side discharge member 332 and the sheet P stacked on the bottom portion 311 of the sheet stacking unit 310 is changed. On the other hand, the fixed side discharge member 331 is disposed on the back side of the top surface of the bottom portion 311 of the sheet stacking unit 310 on which the sheets P are stacked, and its position is fixed and provided to perform only rotational movement.

More specifically, moving side discharge member 332 moves in the direction of arrow Q1, and moving side discharge member 332 approaches bottom 311 of sheet stacking unit 310 (position P2 drawn by a broken line). On the other hand, the moving-side discharging member 332 moves in the direction of the arrow Q2, and the moving-side discharging member 332 separates from the bottom portion 311 of the sheet stacker 310 (position P1 drawn by solid lines).
Then, the moving side discharge member 332 is driven by a motor (not shown) or the like in a state of being in contact with the sheet P, and rotates in the T1 direction (counterclockwise direction in FIG. 2) to raise the sheet bundle B (third And the sheet bundle B is discharged.
The positions P1 and P2 of the moving side discharge member 332 can be changed according to the number and thickness of the sheets P supplied to the sheet stacking unit 310.

  The paddle 340 is provided above the sheet stacking unit 310 and on the upstream side of the sheet bundle B in the discharge direction with respect to the sheet discharge unit 330. In addition, the paddle 340 is provided such that the distance to the bottom portion 311 of the sheet stacking unit 310 changes in response to driving of a motor (not shown) or the like. Specifically, paddle 340 is provided movably in the directions of arrows U1 and U2 in FIG. 2, and moves in the direction of arrow U1 to approach bottom portion 311 of sheet stacking unit 310, and moves in the direction of arrow U2. By moving, it is separated from the bottom portion 311 of the sheet stacking unit 310. Then, the paddle 340 rotates in the direction of arrow R in FIG. 2 (clockwise direction in FIG. 2), whereby the sheet P conveyed in the first traveling direction S1 direction in FIG. (In the second traveling direction S2).

The tamper 350 has a first tamper 351 and a second tamper 352 opposed to each other with the sheet stacker 310 interposed therebetween. Specifically, the first tamper 351 and the second tamper 352 are arranged to face each other in a direction (vertical direction in FIG. 3) intersecting the second traveling direction S2. The first tamper 351 and the second tamper 352 are configured such that the distance between the first tamper 351 and the second tamper 352 changes in response to the drive of a motor or the like (not shown).
Here, the tamper 350 is configured to align the end portion along the traveling direction of the sheet P falling along the bottom portion 311 of the sheet stacking unit 310. Specifically, the first tamper 351 moves between a position approaching the sheet stacker 310 (a position drawn by a solid line) and a position away from the sheet stacker 310 (a position drawn by a broken line) (Arrows C1 and C2) are arranged. On the other hand, the second tamper 352 moves between a position approaching the sheet stacker 310 (a position drawn by a solid line) and a position away from the sheet stacker 310 (a position drawn by a broken line) (arrow C3). And C4).
The respective positions of the first tamper 351 and the second tamper 352 in the present embodiment are changed in accordance with the sheet size and orientation of the sheet P supplied to the sheet stacking unit 310.

In FIG. 2, the direction in which the sheet bundle B is discharged from the sheet stacking unit 310 to the stacker unit 34 by the discharge unit 330 is the x direction, and the direction in which the sheet bundle B is discharged is orthogonal to the sheet bundle B The direction (width direction of the sheet bundle B) is referred to as y direction, and the direction orthogonal to the storage surface of the sheet stacking unit 310 is referred to as z direction. The same applies to the drawings shown below.
Further, the lower side in FIG. 3 indicates the user side of the sheet processing system 1 and indicates the front side of the sheet in FIGS. 1 and 2.

[Binding unit]
The binding unit 320 includes a stapler 400 as an example of a needle binding means for binding the sheet bundle B using staples, and a needleless binding device 500 as an example of a needleless binding means for binding the sheet bundle B without using a needle. Equipped with

  The stapler 400 and the stapleless binding device 500 are connected and continuously provided in a direction (width direction (y direction)) orthogonal to the sheet bundle B discharge direction. The stapler 400 is disposed closer to the user (lower side in FIG. 3) of the sheet processing system 1 than the stapleless binding device 500. By disposing the stapler 400 on the user side (the lower side in FIG. 3), it is possible to easily perform maintenance work on the stapler 400 such as replenishment of staples.

The binding unit 320 is disposed on a rail 325 provided in the apparatus casing, and is configured to be movable in the width direction (y direction) of the sheet bundle B by a motor (not shown). Since the binding unit 320 can move in the width direction (y direction) of the sheet bundle B, the stapler 400 and the stapleless binding device 500 perform binding processing at any position in the width direction (y direction) of the sheet bundle B. It is possible to
The stapler 400 and the stapleless binding device 500 may not be connected.

«Stapler»
The stapler 400 is configured to staple an end portion of the sheet bundle B generated in the sheet stacking unit 310 by pushing a staple into the sheet P. That is, a stapler motor (not shown) is driven, and the stapler 400 pushes one staple into the sheet bundle B. The staple is pushed into the sheet bundle B, and the sheet bundle B is bound by bending the end of the staple on the opposite side of the sheet bundle B. As a result, a sheet bundle B bound by staples is generated.

«Stitch-less binding device»
FIG. 4 is a view showing a schematic configuration of the needleless binding device 500. As shown in FIG. 4A shows a state before binding the sheet bundle B, and FIG. 4B shows a state when binding the sheet bundle B. FIG.
FIG. 5 is a view showing a first pressure bonding member 511 and a second pressure bonding member 521, which will be described later, of the needleless binding device 500. FIG. 5A is a perspective view of the first pressure bonding member 511 and the second pressure bonding member 521. 5 (b) is a view seen from the Vb direction of FIG. 4 (a), and FIG. 5 (c) is a view seen from the Vc direction of FIG. 4 (b).

  The needleless binding device 500 includes a first drive unit 510 and a second drive unit 520, which are a pair of drive units extending in the left-right direction in FIG. 4, and a support shaft for supporting the first drive unit 510 and the second drive unit 520. And 530 are provided. The needleless binding device 500 further includes a spring member 540 that applies a pressing force that separates the first drive unit 510 and the second drive unit 520, and the first drive unit 510 against the pressing force of the spring member 540. And a cam 550 for pressing down.

The first drive unit 510 is provided at one end, which is an end on the sheet stacking unit 310 side, and includes a first pressure-bonding member 511 that protrudes to the second drive unit 520 side. The first drive portion 510 is formed at the other end with a through hole (not shown) through which the support shaft 530 is passed.
The second drive unit 520 is provided at one end, which is an end on the sheet stacking unit 310 side, and includes a second pressure-bonding member 521 that protrudes to the first drive unit 510 side. The second drive portion 520 is formed at the other end with a through hole (not shown) in which the support shaft 530 is fitted and fixed, and a through hole 522 through which the support shaft 326 fixed to the apparatus housing passes. It is done.

The support shaft 530 is a cylindrical member, one end of which is fixed to the second drive unit 520, and the other end of which is fitted in the through hole formed in the first drive unit 510 with loose fitting. . The support shaft 530 supports the first drive unit 510 so as to be movable in the vertical direction.
The spring member 540 is a coil spring, and one end is supported by the first drive unit 510 and the other end is supported by the second drive unit 520.
The cam 550 receives a rotational driving force by a motor (not shown) and rotates about the rotational shaft 551 as a rotation center.

In the needleless binding device 500, as shown in FIG. 4B, the cam 550 rotates counterclockwise by an angle determined in advance by a driving force from a driving motor (not shown) connected to the rotating shaft 551. By rotating in FIG. 4A, the first driving unit 510 is pushed down against the pressure from the spring member 540. Thereby, the first pressure bonding member 511 of the first drive unit 510 and the second pressure bonding member 521 of the second drive unit 520 are pressure bonded.
On the other hand, when the cam 550 rotates in the clockwise direction (see FIG. 4B) from the state in which the first drive unit 510 is pushed down, the first drive unit 510 receives the pressure from the spring member 540. It returns to the position (state shown to Fig.4 (a)) which 511 and the 2nd crimping | compression-bonding member 521 separate.

As shown in FIG. 5A, the first pressure bonding member 511 and the second pressure bonding member 521 are configured by arranging a plurality of triangular projections (teeth) regularly, for example, in the form of a bar code. The protrusion 511 a of the pressure bonding member 511 and the protrusion 521 a of the second pressure bonding member 521 are set to mesh with each other. That is, at the time of crimping of the first crimping member 511 and the second crimping member 521, the protrusions 511a of the first crimping member 511 are arranged so as to be located between the protrusions 521a and the protrusions 521a of the second crimping member 521, respectively. (See FIG. 5 (c)). As a result, the sheet P is locally deformed by being sandwiched between the protrusion 511 a of the first pressure bonding member 511 and the protrusion 521 a of the second pressure bonding member 521, and the sheets P mesh with each other at the deformed portion (pressure bonding portion) The sheet bundle B is bound by the entanglement of fibers constituting the sheet P).
The shapes of the protrusions (teeth) of the first pressure bonding member 511 and the second pressure bonding member 521 may be any shape as long as the sheet P can be locally deformed by meshing the first pressure bonding member 511 and the second pressure bonding member 521. It may be.

(Comparison of bound parts)
FIG. 6A is a diagram comparing the staple binding unit 410 and the stapleless binding unit 550. FIG. FIG. 6 (b) is a view showing the range of the stapleless binding section 550.
The binding unit 320 can be moved in the width direction (y direction) along the support shaft 326 fixed to the apparatus housing, and can form one or more binding portions defined in advance in the sheet bundle B. When staple binding is selected by the user via, for example, the user interface, the sheet processing control unit 33 performs staple binding processing using the stapler 400. On the other hand, when stapleless binding is selected by the user via, for example, the user interface, the sheet processing control unit 33 performs stapleless binding processing using the stapleless binding device 500. Hereinafter, a portion bound by the stapler 400 will be referred to as a “stitched portion 410”, and a portion bound by the needleless binding device 500 will be referred to as a “needleless bound portion 550”.

  As shown in FIG. 6A, the length L 550 of the stapleless binding section 550 is longer than the length L 410 of the staple binding section 410. That is, the protrusion 511 a of the first pressure-bonding member 511 of the first drive unit 510 and the first bonding member 511 of the first driving unit 510 are subjected to one binding process (crimping) of the stapler-less binding device 500 than the length in the width direction (y direction) The length in the width direction (y direction) of the portion sandwiched by the protrusion 521 a of the second pressure bonding member 521 of the second driving portion 520 is longer. This is because, if the lengths of both are the same, the binding force due to the mutual engagement of the sheets P (entanglement of the fibers constituting the sheet P) is weaker than the binding force by the staples, for example This is because the binding is likely to be released (the rolled sheet P is easily peeled from the sheet bundle B) when a part of the sheets P constituting the sheet bundle B is cut. Therefore, in the binding unit 320 according to the present embodiment, the length in the width direction (y direction) of the needleless binding portion 550 is made longer than the length in the width direction (y direction) of the needle binding portion 410. Making it difficult to

  The first crimping member 511 of the first drive unit 510 of the needleless binding device 500 and the second crimping member 521 of the second drive unit 520 are crimped a plurality of times at a position adjacent to each other, and a plurality of crimped bindings to a position adjacent to each other. One needleless binding section 550 may be formed by forming a section. For example, the distance ΔL between the crimped binding portions shown in FIG. 6B is less than the distance ΔT (see FIG. 5B) between the apexes of the protrusions (teeth) of the first crimping member 511 and the second crimping member 521. In this case, the plurality of crimped binding portions may be formed at a position adjacent to each other, and the plurality of crimped binding portions may constitute one stapleless binding portion 550. Therefore, in order to make the length in the width direction (y direction) of the stapleless binding portion 550 longer than the length of the needle binding portion 410, the width direction of the first pressure bonding member 511 and the second pressure bonding member 521 (y direction The length of) may not be longer than the length of the staple.

(Position of binding section)
FIG. 7 is a diagram showing the positions of the staple binding unit 410 and the stapleless binding unit 550. FIG. 7A is a view showing the position of the needle binding unit 410, and FIG. 7B is a view showing the position of the needleless binding unit 550.
As shown in FIGS. 1 to 3, a discharge roll 333 is disposed on the downstream side of the binding unit 320 in the sheet bundle discharge direction (x direction). The discharge roll 333 discharges the sheet bundle B to the stacker unit 34 when the binding unit 320 finishes generating the sheet bundle B. Therefore, the sheet bundle B subjected to the binding process is pressed by the discharge roll 333. Two discharge rolls 333 (a pair of fixed side discharge rolls 331 a and moving side discharge rolls 332 a) are provided in the width direction (y direction) of the sheet bundle B.

In order to suppress the occurrence of loosening or peeling due to the pressing force received from the discharge roll 333 by the needleless binding unit 550 that is bound by the needleless binding device 500, in the binding unit 320 according to the present embodiment, the needleless binding is performed. The device 500 forms the needleless binding section 550 at a position where it is not pressed by the discharge roll 333.
Further, according to the present embodiment, in order to suppress that the staple needle is deformed or the staple needle damages the discharge roller 333 by the discharge roller 333 pressing the stapled portion 410 bound by the stapler 400. In the binding unit 320, the stapler 400 forms the staple binding portion 410 at a position where the stapler 400 is not pressed by the discharge roll 333.
More specifically, when forming the staple binding unit 410 and the stapleless binding unit 550 in the even direction in the width direction (y direction), the staple binding unit 410 and the stapleless binding unit 550 are formed outside the discharge roll 333 Form.

Hereinafter, the position of the needle binding unit 410 and the position of the needleless binding unit 550 will be described more specifically.
Here, in the following description, the end on the center side in the width direction (y direction) of the staple portion 410 is referred to as “needle inner end 410i”, and the outer end is referred to as “needle outer end 410 o”. The end on the center side in the width direction (y direction) of the stapleless binding section 550 is referred to as “needleless binding section inner end 550i”, and the outer end is referred to as “needleless binding section outer end 550o”. Further, the end on the center side of the discharge roll 333 is referred to as "roll inner end 333i", and the outer end is referred to as "roll outer end 333o".

For example, when two staple binding portions 410 are formed in the width direction (y direction) of the sheet bundle B, the center position 410c of the needle binding portion inner end 410i of the two staple binding portions 410 is the center position Bc of the sheet bundle B. And the center position 410c of the two needle binding portion inner ends 410i is formed to be equal to the center position 333c between the roll inner ends 333i of the two discharge rolls 333. Then, the distance L410i between the two needle binding portion inner ends 410i is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333.
Thus, in the case of forming two staple binding portions 410 in the width direction of sheet bundle B, each staple binding portion 410 is formed on the outer side of each discharge roll 333 in the binding unit 320 according to the present embodiment. .

  When two stapleless binding sections 550 are formed in the width direction (y direction) of the sheet bundle B, the needleless binding section inner end 550i of each stapleless binding section 550 and the roll outer end 333o of each discharge roll 333 The distance .DELTA.Lp between them is formed to be equal to or greater than the distance .DELTA.Ls between the needle binding portion inner end 410i of each needle binding portion 410 and the roll outer end 333o of each discharge roll 333. Thereby, when forming two stapleless binding parts 550 in the width direction of sheet bundle B, even if the length in the width direction of stapleless binding parts 550 is made longer than the length of staple binding parts 410, it is more accurate The respective needleless binding sections 550 are formed outside the discharge roll 333. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, it is possible to make it difficult for the sheets P constituting the sheet bundle B to separate from the sheet bundle B. In addition, it is preferable that the center position 550c of the needleless binding inner end 550i of the two needleless binding units 550 be equal to the center position Bc of the sheet bundle B. As a result, the appearance of the sheet bundle B that has been bound by the two needleless binding sections 550 becomes clear.

FIG. 8 shows a staple binding portion 410 and a staple when forming a plurality of staple binding portions 410 and stapleless binding portions 550 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B. It is a figure which shows the position of the no binding part 550. FIG. FIG. 8A is a view showing the position of the needle binding unit 410, and FIG. 8B is a view showing the position of the needleless binding unit 550. As shown in FIG.
When forming a plurality of staple binding portions 410 and stapleless binding portions 550 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B, a plurality of staple binding portions formed in one direction The staple binding portion 410 and the plurality of staple binding portions 410 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. In addition, the center position 410d of the needle binding portion inner end 410i of the two needle binding portions 410 near the center is formed to be equal to the center position 333c between the roll outer ends 333o of the two discharge rolls 333 and two center positions The distance L410j between the needle binding portion inner ends 410i of the needle binding portion 410 is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333.

  The average distance (= (ΔLp1 +... + ΔLpn) / n) from the roll outer end 333o of each discharge roll 333 to the needleless stitch inner end 550i of the plurality of needleless binding sections 550 is the roll of each discharge roll 333 It is preferable that the average distance from the outer end 333 o to the inner end 410 i of the needle binding unit 410 of the plurality of needle binding units 410 is equal to or greater than (= (ΔLs1 +... + ΔLsn) / n). Thereby, when forming a plurality of needleless binding sections 550 in one direction from the center position Bc of sheet bundle B, the length in the width direction of the needleless binding sections 550 is made longer than the length of the needle binding sections 410. Also, all the needleless binding sections 550 are formed outside the discharge roll 333 with higher accuracy. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, it is possible to make it difficult for the sheets P constituting the sheet bundle B to separate from the sheet bundle B. Further, the plurality of needleless binding sections 550 formed in one direction and the plurality of needleless binding sections 550 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. . As a result, the appearance of the sheet bundle B that has been bound by the two needleless binding sections 550 becomes clear.

In the case where three or more staple binding portions 410 are formed in one direction and the other direction from the center position Bc of the sheet bundle B, the other two or more staple binding portions from the staple binding portion 410 closest to the center are formed. It is preferable that the portions 410 be formed at equal intervals. Similarly, in the case where three or more stapleless binding sections 550 are formed in one direction from the center position Bc of the sheet bundle B, the other two or more stapleless binding sections from the nearest center stapleless binding section 550 are formed. It is preferable that the portions 550 be formed at equal intervals. As a result, the appearance of the sheet bundle B that has been bound by the two needleless binding sections 550 becomes clear.
In addition, if the staple binding unit 410 and the stapleless binding unit 550 can be formed on the outside of the discharge roll 333, the center position 410 c (410 d) of the needle binding unit inner end 410 i of the staple binding unit 410, stapleless binding The center position 550c of the needleless binding portion inner end 550i of the portion 550 may not necessarily be equal to the center position 333c between the roll inner ends 333i of the discharge roll 333.

  The example described above is the case where the staple binding unit 410 and the stapleless binding unit 550 are formed in the even direction in the width direction (y direction), but the staple binding unit 410 and the stapleless binding unit 550 are in the width direction (y direction) When forming an odd number of places, it is preferable to form at the following positions. That is, one staple binding unit 410 and stapleless binding unit 550 are formed at the center position Bc of the sheet bundle B, and the remaining even staple binding unit 410 and stapleless binding unit 550 are the examples of the even numbered locations described above Similarly, it may be formed outside the discharge roll 333. As a result, by setting the length in the width direction (y direction) of the staple binding unit 410 and the stapleless binding unit 550 to be smaller than the distance L 333 i between the roll inner ends 333 i of the discharge roll 333, all the staple binding units 410, The stapleless binding section 550 is formed at a position where it is not pressed by the discharge roll 333. As a result, loosening or peeling of the stapleless binding section 550 due to the pressure force received from the discharge roll 333 is suppressed, and the sheets P constituting the sheet bundle B are less likely to be peeled off from the sheet bundle B.

<First Modified Example of Position of Binding Portion>
FIG. 9 is a view showing a first modified example of the positions of the staple binding unit 410 and the stapleless binding unit 550. As shown in FIG. FIG. 9A is a view showing the position of the staple binding portion 410, and FIG. 9B is a view showing the position of the stapleless binding portion 550. As shown in FIG.
When two staple binding portions 410 are formed in the width direction (y direction) of the sheet bundle B, the center position 410c of the needle binding portion inner end 410i of the two staple binding portions 410 is equal to the center position Bc of the sheet bundle B The center position 410c of the needle binding portion inner end 410i of the two needle binding portions 410 is formed to be equal to the center position 333c between the roll inner ends 333i of the two discharge rolls 333. Then, the distance L410i between the needle binding portion inner ends 410i of the two needle binding portions 410 is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333. This point is the same as that of the above-described embodiment.

  In the first modification, when two stapleless binding sections 550 are formed in the width direction (y direction) of sheet bundle B, the center of needleless binding section inner end 550i of two stapleless binding sections 550 is formed. The position 550d is formed to be equal to the center position Bc of the sheet bundle B, and the distance L550ib between the needleless binding inner end 550i of each needleless binding section 550 and the center position Bc of the sheet bundle B is needle binding The distance L 410 ib between the needle binding portion inner end 410 i of the unit 410 and the center position Bc of the sheet bundle B is equal to or greater than L 410 ib. Thus, when forming two stapleless binding sections 550 in the width direction (y direction) of sheet bundle B, the length in the width direction of stapleless binding sections 550 is made longer than the length of staple binding sections 410. Also, each needleless binding portion 550 is formed on the outside of the discharge roll 333 with higher accuracy. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B.

FIG. 10 shows a staple binding portion 410 and a staple when forming a plurality of staple binding portions 410 and stapleless binding portions 550 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B. It is a figure which shows the 1st modification of the position of the no binding part 550. FIG. FIG. 10A is a view showing the position of the staple binding portion 410, and FIG. 10B is a view showing the position of the stapleless binding portion 550. As shown in FIG.
When forming a plurality of needle binding portions 410 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B, the plurality of needle binding portions 410 formed in one direction The plurality of staple binding portions 410 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. In addition, the center position 410d of the needle binding portion inner end 410i of the two needle binding portions 410 near the center is formed to be equal to the center position 333c between the roll outer ends 333o of the two discharge rolls 333 and two center positions The distance L410j between the needle binding portion inner ends 410i of the needle binding portion 410 is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333.

  The average distance from the center position Bc of the sheet bundle B to the needleless binding portion inner end 550i of the plurality of needleless binding portions 550 formed in one direction and the other direction in the width direction (y direction) (= (L550ib1 + ... + L550ibn) / n) is an average distance from the center position Bc of the sheet bundle B to the inner end 410i of the needle binding portion 410 of the plurality of needle binding portions 410 formed in one direction in the width direction (y direction) (L410ib1 +... + L410ibn) / n) or more. Thereby, when forming a plurality of needleless binding parts 550 in one direction from the center position Bc of the sheet bundle B, the length in the width direction (y direction) of the needleless binding parts 550 is greater than the length of the needle binding parts 410 Even if it is long, all the needleless binding sections 550 are formed outside the discharge roll 333 with higher accuracy. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B. Further, it is assumed that the plurality of needleless binding sections 550 formed in one direction and the plurality of needleless binding sections 550 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. good. As a result, the appearance of the sheet bundle B bound by the plurality of needleless binding sections 550 becomes clear.

When three or more staple binding portions 410 and stapleless binding portions 550 are formed in one direction and the other direction from the center position Bc of the sheet bundle B, the staple binding portion 410 closest to the center, no needles It is preferable that two or more needle binding parts 410 and needle no binding parts 550 are formed at equal intervals from the binding part 550.
Further, when forming the staple binding portion 410 and the stapleless binding portion 550 at an odd number in the width direction (y direction), one staple binding portion 410 and the stapleless binding portion 550 are formed at the center position Bc of the sheet bundle B. In addition, it is preferable to form the remaining even numbered staple binding portions 410 and needleless binding portions 550 in the same manner as the above-described example of the even numbered portion. As a result, all the staple binding portions 410 and the stapleless binding portions 550 are formed at positions where the discharge roll 333 does not press them. As a result, loosening or peeling of the stapleless binding section 550 due to the pressure force received from the discharge roll 333 is suppressed, and the sheets P constituting the sheet bundle B are less likely to be peeled off from the sheet bundle B.

<Second Modified Example of Position of Binding Portion>
FIG. 11 is a view showing a second modified example of the positions of the staple binding unit 410 and the stapleless binding unit 550. As shown in FIG. FIG. 11A is a view showing the position of the needle binding unit 410, and FIG. 11B is a view showing the position of the needleless binding unit 550.
When two staple binding portions 410 are formed in the width direction (y direction) of the sheet bundle B, the center position 410c of the needle binding portion inner end 410i of the two staple binding portions 410 is equal to the center position Bc of the sheet bundle B And the center position 410c of the needle binding portion inner end 410i of the two staple binding portions 410 is formed to be equal to the center position 333c between the roll outer end 333o (roll inner end 333i) of the two discharge rolls 333 Do. The distance L410ir between the needle binding portion inner end 410i of each staple binding portion 410 and the center position 333c between the roll outer end 333o of the discharge roll 333 is the roll outer end 333o of each discharge roll 333 and the roll outer end It is formed to be larger than the distance L333or between the center position 333c between 333o.

  When two stapleless binding sections 550 are formed in the width direction (y direction) of the sheet bundle B, between the needleless binding section inner end 550i of each stapleless binding section 550 and the roll outer end 333o of the discharge roll 333 The distance L550 ir between the center position 333 c and the center position 333 c is equal to or greater than the distance L 410 ir between the needle binding portion inner end 410 i of each needle binding portion 410 and the center position 333 c between the roll outer end 333 o . Thereby, when forming two stapleless binding parts 550 in the width direction of sheet bundle B, even if the length in the width direction of stapleless binding parts 550 is made longer than the length of staple binding parts 410, it is more accurate The respective needleless binding sections 550 are formed outside the discharge roll 333. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B.

FIG. 12 shows a staple binding portion 410 and a stapleless portion when forming a plurality of staple binding portions 410 and stapleless binding portions 550 in one direction and the other direction in the width direction (y direction) from the center position of the sheet bundle. It is a figure which shows the 2nd modification of the position of the binding part 550. FIG. FIG. 12A is a view showing the position of the needle binding unit 410, and FIG. 12B is a view showing the position of the needleless binding unit 550.
When forming a plurality of needle binding portions 410 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B, the plurality of needle binding portions 410 formed in one direction The plurality of staple binding portions 410 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. In addition, the center position 410d of the needle binding portion inner end 410i of the two needle binding portions 410 near the center is formed to be equal to the center position 333c between the roll outer ends 333o of the two discharge rolls 333 and two center positions A distance L410ir1 between each needle binding portion inner end 410i of the needle binding portion 410 and the center position 333c between the roll outer end 333o of the discharge roll 333 is between the roll outer end 333o of each discharge roll 333 and the roll outer end 333o It is formed to be larger than the distance L333 or between the center position 333 c of the

  The average distance from the center position 333c between the roll outer ends 333o of the discharge roll 333 to the needleless inner end 550i of the plurality of needleless staples 550 formed in one direction in the width direction (y direction) (= (L550ir1 +... + L550irn) / n) from the center position 333c between the roll outer ends 333o to the needle binding portion inner end 410i of the plurality of needle binding portions 410 formed in one direction in the width direction (y direction) The average distance (= (L410ir1 +... + L410irn) / n) or more is preferable. Thereby, when forming a plurality of needleless binding sections 550 in one direction from the center position Bc of sheet bundle B, the length in the width direction of the needleless binding sections 550 is made longer than the length of the needle binding sections 410. Also, all the needleless binding sections 550 are formed outside the discharge roll 333 with higher accuracy. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B. Further, it is assumed that the plurality of needleless binding sections 550 formed in one direction and the plurality of needleless binding sections 550 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. good. As a result, the appearance of the sheet bundle B bound by the plurality of needleless binding sections 550 becomes clear.

When three or more staple binding portions 410 and stapleless binding portions 550 are formed in one direction and the other direction from the center position Bc of the sheet bundle B, the staple binding portion 410 closest to the center, no needles It is preferable that two or more needle binding parts 410 and needle no binding parts 550 are formed at equal intervals from the binding part 550.
Further, when forming the staple binding portion 410 and the stapleless binding portion 550 at an odd number in the width direction (y direction), one staple binding portion 410 and the stapleless binding portion 550 are formed at the center position Bc of the sheet bundle B. In addition, it is preferable to form the remaining even numbered staple binding portions 410 and needleless binding portions 550 in the same manner as the above-described example of the even numbered portion. As a result, all the staple binding portions 410 and the stapleless binding portions 550 are formed at positions where the discharge roll 333 does not press them. As a result, loosening or peeling of the stapleless binding section 550 due to the pressure force received from the discharge roll 333 is suppressed, and the sheets P constituting the sheet bundle B are less likely to be peeled off from the sheet bundle B.

<Third Modification of Position of Binding Portion>
When two staple binding portions 410 are formed in the width direction (y direction) of the sheet bundle B, the center position 410c (see FIG. 7) of the needle binding portion inner end 410i of the two staple binding portions 410 is the sheet bundle B. The center position 410c of the needle binding portion inner end 410i of the two staple binding portions 410 is formed to be equal to the center position Bc (see FIG. 7) and the center position 333c between the roll inner ends 333i of the two discharge rolls 333 (see FIG. 7) to be equal to Then, the distance L410i between the needle binding portion inner ends 410i of the two needle binding portions 410 is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333. This point is the same as that of the above-described embodiment.

  When two stapleless binding sections 550 are formed in the width direction (y direction) of sheet bundle B, the distance L550i between the needleless binding section inner ends 550i of the two stapleless binding sections 550 (see FIG. 7) Is formed to be equal to or greater than a distance L410i (see FIG. 7) between the needle binding portion inner ends 410i of the two needle binding portions 410. Thereby, when forming two stapleless binding parts 550 in the width direction of sheet bundle B, even if the length in the width direction of stapleless binding parts 550 is made longer than the length of staple binding parts 410, it is more accurate The respective needleless binding sections 550 are formed outside the discharge roll 333. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B.

FIG. 13 shows a staple binding portion 410 and a stapleless portion when forming a plurality of staple binding portions 410 and stapleless binding portions 550 in one direction and the other direction in the width direction (y direction) from the center position of the sheet bundle. It is a figure which shows the 3rd modification of the position of the binding part 550. FIG. FIG. 13 (a) is a view showing the position of the staple binding unit 410, and FIG. 13 (b) is a view showing the position of the stapleless binding unit 550. As shown in FIG.
When forming a plurality of needle binding portions 410 in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B, the plurality of needle binding portions 410 formed in one direction The plurality of staple binding portions 410 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. In addition, the center position 410d of the needle binding portion inner end 410i of the two needle binding portions 410 near the center is formed to be equal to the center position 333c between the roll outer ends 333o of the two discharge rolls 333 and two center positions The distance L410j between the needle binding portion inner ends 410i of the needle binding portion 410 is formed to be larger than the distance L333o between the roll outer ends 333o of the two discharge rolls 333.

  Then, the needleless binding of the two needleless binding portions 550 near the centers of the plurality of needleless binding portions 550 formed in one direction and the other direction in the width direction (y direction) from the center position Bc of the sheet bundle B The distance L 550 j between the inner end 550 i is set to be equal to or greater than the distance L 410 j between the inner end 410 i of the staple portion of the two staple portions 410 near the center. Thus, when forming a plurality of needleless bindings 550 in one direction and the other direction from the center position Bc of the sheet bundle B, the length in the width direction of the needleless bindings 550 is greater than the length of the needled bindings 410 Even if it is long, all the needleless binding sections 550 are formed outside the discharge roll 333 with higher accuracy. Therefore, occurrence of loosening or peeling of the stapleless binding portion 550 due to the pressing force received from the discharge roll 333 is suppressed. As a result, the sheets P constituting the sheet bundle B hardly come off from the sheet bundle B. Further, it is assumed that the plurality of needleless binding sections 550 formed in one direction and the plurality of needleless binding sections 550 formed in the other direction are symmetrical with respect to the center position Bc of the sheet bundle B. good. As a result, the appearance of the sheet bundle B bound by the plurality of needleless binding sections 550 becomes clear.

When three or more staple binding portions 410 and stapleless binding portions 550 are formed in one direction and the other direction from the center position Bc of the sheet bundle B, the staple binding portion 410 closest to the center, no needles It is preferable that two or more needle binding parts 410 and needle no binding parts 550 are formed at equal intervals from the binding part 550.
Further, when forming the staple binding portion 410 and the stapleless binding portion 550 at an odd number in the width direction (y direction), one staple binding portion 410 and the stapleless binding portion 550 are formed at the center position Bc of the sheet bundle B. In addition, it is preferable to form the remaining even numbered staple binding portions 410 and needleless binding portions 550 in the same manner as the above-described example of the even numbered portion. As a result, all the staple binding portions 410 and the stapleless binding portions 550 are formed at positions where the discharge roll 333 does not press them. As a result, loosening or peeling of the stapleless binding section 550 due to the pressure force received from the discharge roll 333 is suppressed, and the sheets P constituting the sheet bundle B are less likely to be peeled off from the sheet bundle B.

DESCRIPTION OF SYMBOLS 1 ... sheet processing system, 2 ... image forming device, 3 ... post processing device, 300 ... binding processing device, 320 ... binding unit, 330 ... discharging unit, 333 ... discharging roll, 400 ... stapler, 500 ... needleless binding device

Claims (10)

Needle binding means for binding a sheet bundle using a needle;
Needle-less binding means for binding a sheet bundle without using a needle;
A discharge roll for discharging the bound sheet bundle;
Equipped with
The length of the stapleless binding unit stapled by the stapleless binding unit is longer than the length of the stapled binding unit stapled by the staple binding unit, and the staple binding unit and the stapleless binding unit A binding processing device formed at a position where it is not pressed. The binding processing device according to claim 1, wherein a distance between the needleless binding section and an end of the discharge roll is equal to or more than a distance between the needle binding section and an end of the discharge roll. The staple binding means and the stapleless binding means form a plurality of binding portions in a direction orthogonal to the discharge direction by the discharge roll, from a center of the orthogonal direction of the sheet bundle in one direction of the orthogonal direction;
The binding process according to claim 1 or 2, wherein an average distance from an end of the discharge roll to the plurality of needleless binding sections is equal to or more than an average distance from an end of the discharge roll to the plurality of needle binding sections. apparatus. 2. The binding according to claim 1, wherein a distance between the needleless binding unit and a center of a sheet bundle in a direction orthogonal to a discharge direction by the discharge roll is equal to or larger than a distance between the needle binding unit and the center. Processing unit. The staple binding means and the stapleless binding means form a plurality of binding portions in a direction orthogonal to the discharge direction by the discharge roll, from a center of the orthogonal direction of the sheet bundle in one direction of the orthogonal direction;
The binding processing device according to claim 1 or 4, wherein an average distance from the center to the plurality of needleless binding sections is equal to or more than an average distance from the center to the plurality of needle binding sections. The binding processing device according to claim 1, wherein a distance between the needleless binding unit and a center of the plurality of rolls included in the discharge roll is equal to or larger than a distance between the needle binding unit and the center. The staple binding means and the stapleless binding means form a plurality of binding portions in a direction orthogonal to the discharge direction by the discharge roll, from a center of the orthogonal direction of the sheet bundle in one direction of the orthogonal direction;
The binding process according to claim 1 or 6, wherein the average distance from the center of the plurality of rolls of the discharge roll to the plurality of needleless binding sections is equal to or more than the average distance from the center to the plurality of needle binding sections. apparatus. The staple binding means and the stapleless binding means perform a binding process on two places of the sheet bundle,
The binding processing device according to claim 1, wherein a distance between the two needleless binding sections is equal to or more than a distance between the two needle binding sections. The staple binding means and the stapleless binding means form a plurality of binding portions in a direction orthogonal to the discharge direction by the discharge roll, from a center of the orthogonal direction of the sheet bundle in one direction of the orthogonal direction;
2. The binding processing device according to claim 1, wherein a distance between two central portions of the plurality of needleless binding portions is equal to or greater than a distance between two central portions of the plurality of needle binding portions. 10. The binding processing device according to claim 3, wherein the sum of the lengths of the plurality of needleless binding sections is larger than the sum of the lengths of the plurality of needle binding sections.

Images