JP2014012568A - Recording material processing apparatus and image forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stacking performance in stacking recording material bundles having a larger thickness area and a smaller thickness area.SOLUTION: In performing binding processing by a binding device 500, a sheet bundle stacking section 70 is elevated, the top sheet bundle out of a plurality of stacked sheet bundles is pushed against a unit 510. Thus, an area having a larger thickness in the sheet bundle (area to which binding processing is executed) is pressed, and a thickness of each sheet bundle is reduced. And in this case, collapse of the stacked sheet bundles is hard to occur. Further, the number of sheet bundles that can be stacked can be increased.

Description

  The present invention relates to a recording material processing apparatus and an image forming system.

  A plurality of binding means for performing binding processing on the sheet bundle are provided, and at least one binding means can be selected automatically or manually from the plurality of binding means, and post-processing is performed on the sheet bundle by the selected binding means. A post-processing method to be performed has been proposed (see, for example, Patent Document 1).

JP 2000-318918 A

  An object of the present invention is to improve the stackability when stacking recording material bundles having a portion having a large thickness and a portion having a small thickness.

According to the first aspect of the present invention, there is provided a stacking portion on which a recording material bundle having a portion having a large thickness and a portion having a small thickness is formed, and the stacking portion on which the recording material bundle is stacked. A moving means for moving the recording material upward, and a pressed portion to which the thick portion of the recording material bundle placed on the stacking part, which is located above the stacking part and moves upward by the moving means, is pressed And a contact portion.
According to a second aspect of the present invention, the recording material bundle is subjected to binding processing, and a portion of the recording material bundle subjected to binding processing is pressed against the pressed portion. The recording material processing apparatus according to claim 1, wherein the recording material processing apparatus is a recording material processing apparatus.
According to a third aspect of the present invention, a recording material bundle generation unit that generates a recording material bundle by performing a binding process on a plurality of stacked recording materials is provided above the stacking unit. The recording material processing apparatus according to claim 1, wherein the pressing unit is configured by a part of the recording material bundle generation unit.
The invention according to claim 4 includes an image forming unit that forms an image on a recording material, and a recording material stacking unit that stacks a plurality of recording materials on which images are formed by the image forming unit, and has a large thickness. A recording material bundle generating unit that generates a recording material bundle having a portion and a portion having a small thickness, a stacking unit on which the recording material bundle generated by the recording material bundle generating unit is stacked, and a recording material bundle stacked A moving means for moving the stacking portion upward, and a portion of the recording material bundle, which is positioned above the stacking portion and is moved upward by the moving means, is pressed against the stacking portion. And an pressed portion to be pressed.
According to a fifth aspect of the present invention, the recording material bundle generating unit is disposed above the stacking unit and performs a binding process on a plurality of recording materials stacked in the recording material stacking unit. Generating a recording material bundle having a portion with a large thickness and a portion with a small thickness, and the pressed portion is constituted by a part of the recording material bundle generation unit, and the recording material bundle generation unit When a new recording material bundle is generated, the stacking unit is raised, and when a new recording material bundle is generated, the recording material bundle placed on the stacking unit The image forming system according to claim 4, wherein the pressing of a portion having a large thickness is performed.
In the invention according to claim 6, the pressed portion is provided with a sensor for detecting that the thick portion of the recording material bundle is pressed against the pressed portion. The image forming system according to claim 4, wherein:

According to the first aspect of the present invention, it is possible to improve the stackability when stacking recording material bundles having a portion having a large thickness and a portion having a small thickness, as compared with the case where the present configuration is not provided. Can do.
According to the second aspect of the present invention, the swelling of the recording material bundle can be more effectively reduced as compared with the case where a portion other than the portion subjected to the binding process is pressed against the pressed portion. Become.
According to invention of Claim 3, compared with the case where a to-be-pressed part is comprised using a dedicated component, the number of parts can be reduced.
According to the fourth aspect of the present invention, it is possible to improve stackability when stacking recording material bundles having a portion having a large thickness and a portion having a small thickness, as compared with the case where the present configuration is not provided. Can do.
According to the fifth aspect of the present invention, when the recording material bundle is generated in comparison with the case where the recording material bundle is not generated in the recording material bundle generation unit, the stacking unit is raised. Productivity can be increased.
According to the invention of claim 6, it is possible to more accurately grasp the stacking height when the recording material bundle having the thick part and the thin part is stacked on the stacking unit.

1 is a schematic configuration diagram illustrating an image forming system to which the exemplary embodiment is applied. FIG. 2 is a diagram when a sheet stacking unit, a binding device, and the like are viewed from the direction of arrow II in FIG. It is a figure for demonstrating a binding mechanism part. FIG. 4 is a diagram illustrating a state of the image forming system when the sheet bundle stacking unit is raised. It is the flowchart which showed the detail of the process at the time of the binding process by a binding apparatus being performed.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram illustrating an image forming system 1 to which the exemplary embodiment is applied. The image forming system 1 includes, for example, an image forming apparatus 2 that forms a toner image on a sheet S as an example of a recording material by electrophotography, and a sheet S on which a toner image is formed by the image forming apparatus 2. A paper processing device 3 that performs predetermined processing is provided.

  The image forming apparatus 2 includes a paper supply unit 6 that supplies the paper S, and an image forming unit 5 that forms a toner image on the paper S supplied from the paper supply unit 6 by an electrophotographic method. Here, the paper supply unit 6 is provided with a first paper stacking unit 61 and a second paper stacking unit 62 on which the paper S is stacked.

  The paper supply unit 6 forms an image of the paper S stacked on the second paper stacking unit 62 and the transport roll 65 that transports the paper S stacked on the first paper stacking unit 61 toward the image forming unit 5. A transport roll 66 that transports toward the unit 5 is provided. The image forming unit 5 can also form an image using an inkjet method. Further, the image forming apparatus 2 is provided with a sheet reversing device 7 for reversing the sheet S on which the image is formed by the image forming unit 5 and a discharge roll 9 for discharging the sheet S on which the image is formed outside the apparatus. .

  The paper processing apparatus 3 as an example of the recording material processing apparatus is provided with a transport apparatus 10 that transports the paper S discharged from the image forming apparatus 2. Further, in the sheet processing apparatus 3 of the present embodiment, a processing apparatus main body 30 that performs a predetermined process on the sheet S is provided on the downstream side in the transport direction of the sheet S from the transport apparatus 10. In addition, the sheet processing apparatus 3 includes a program-controlled CPU, and includes a control unit 80 configured to control each mechanism and each apparatus provided in the sheet processing apparatus 3.

  In the conveyance device 10 of the paper processing device 3, a hole is formed in the paper S received by the entrance roll 11, which is a pair of rolls that receive the paper S discharged by the discharge roll 9 of the image forming device 2. A puncher 12 to be applied is provided. Further, the transport device 10 includes a first transport roll 13 that is a pair of rolls that transport the paper S downstream, and a pair of rolls that transport the paper S toward the processing apparatus main body 30. A second transport roll 14 is provided.

  Further, the processing apparatus main body 30 includes an apparatus frame 36 formed in a box shape. The processing apparatus main body 30 is provided with a receiving roll 31 that is a pair of rolls that receive the paper S from the transport device 10. Further, the processing apparatus main body 30 is provided with a stacking unit 200 provided on the downstream side of the receiving roll 31 and stacking a plurality of sheets S. Here, the stacking unit 200 as an example of the recording material stacking unit is provided with a sheet stacking unit 35 on which the transported sheets S are stacked. Further, in the present embodiment, an exit roll 34 that is a pair of rolls that discharge the paper S toward the paper stacking unit 35 is provided.

  Further, the processing device main body 30 is fed with the paper S that rotates clockwise in the drawing and is sent out by the exit roll 34 and moves toward the left in the drawing while sliding on the paper stacking portion 35. A paddle 37 that conveys toward the end guide 35 </ b> B of the paper stacking unit 35 is provided. Further, the processing apparatus main body 30 is provided so as to be opposed to each of the one side portion and the other side portion of the paper S and presses the paper S so as to sandwich the paper S so as to align the paper S in the width direction. A tamper 38 is provided.

  Further, the processing apparatus main body 30 is provided with a bundle of sheets S (hereinafter referred to as “sheet bundle”) provided on the sheet stacking unit 35 so as to be movable in a direction approaching the sheet stacking unit 35 and a direction away from the sheet stacking unit 35. The eject roll 39 is discharged. The eject roll 39 is retracted away from the paper stacking unit 35 when the paper S is stacked on the paper stacking unit 35. The eject roll 39 contacts the sheet bundle when discharging the sheet bundle from the sheet stacking unit 35. Thereafter, the eject roll 39 rotates and conveys the sheet bundle downstream. As a result, the sheet bundle moves toward the sheet bundle stacking unit 70 attached to the side surface of the apparatus frame 36.

  Further, in the processing apparatus main body 30, the end of the sheet bundle on the sheet stacking unit 35 (the end on the end guide 35B side (hereinafter sometimes referred to as “end guide side end”)) uses a staple needle. A stapler 40 is provided. In the present embodiment, an opening 69 used for discharging the sheet bundle conveyed by the eject roll 39 is provided on the side wall of the apparatus frame 36. Further, the processing device main body 30 performs a binding process for performing a binding process without using a staple needle on the leading end portion (hereinafter, also referred to as a “leading end portion”) of the sheet bundle conveyed by the eject roll 39. An apparatus 500 is provided.

  Here, an apparatus frame 507 is provided in the binding apparatus 500 that functions as a part of the recording material bundle generation unit. Further, in the present embodiment, a binding unit is provided in the apparatus frame 507 so as to be movable along a direction orthogonal to the conveyance direction of the sheet bundle (the depth direction of the processing apparatus main body 30), and performs a binding process on the sheet bundle. 510 is provided. A pressure sensor S1 that is turned on by a pressure applied from below is provided at the lower end of the binding unit 510.

  Although not shown, the binding device 500 includes a unit moving mechanism (not shown) that is configured by an existing technology such as a motor and a pinion gear and moves the binding unit 510 in a direction orthogonal to the conveyance direction of the sheet bundle. Is provided. Further, the binding device 500 is provided with a support member 520 that supports the conveyed paper S from below on the upstream side of the binding unit 510 in the transport direction of the paper S. The binding device 500 is configured separately from the device frame 36 and is detachable from the device frame 36.

  Here, in the present embodiment, as described above, the sheet bundle stacking unit 70 is provided on the side surface of the apparatus frame 36. The sheet bundle stacking unit 70 is provided with a presence / absence detection sensor S2 that detects the presence / absence of a sheet bundle on the sheet bundle stacking unit 70. Here, on the sheet bundle stacking unit 70, a sheet bundle subjected to the binding process by the stapler 40 or a sheet bundle subjected to the binding process by the binding device 500 is stacked.

  The sheet bundle stacking unit 70 is lowered as the sheet bundle is stacked. In the present embodiment, a moving mechanism 100 that moves the sheet bundle stacking unit 70 in the vertical direction is provided. Here, the moving mechanism 100 functioning as a moving means can be configured by an existing technique. The moving mechanism 100 according to the present embodiment includes an endless belt member to which the sheet bundle stacking unit 70 is attached, a pulley that supports the belt member from the inside, and a stepping motor that rotates the pulley. ing.

  FIG. 2 is a view when the sheet stacking unit 35, the binding device 500, and the like are viewed from the direction of arrow II in FIG. In this figure, the illustration of the device frame 507 shown in FIG. 1 is omitted. Further, in this drawing, the illustration of some of the plurality of members shown in FIG. 1 such as the tamper 38 is omitted.

  In the sheet processing apparatus 3 according to the present embodiment, the binding process by the stapler 40 or the binding process by the binding apparatus 500 is performed according to the user's selection. Hereinafter, the binding process by the stapler 40 and the binding process by the binding device 500 will be described with reference to FIGS. 1 and 2.

  First, the binding process performed by the stapler 40 will be described. When the binding process is performed by the stapler 40, the sheets S are discharged toward the sheet stacking unit 35 by the exit roll 34 (see FIG. 1), and a plurality of sheets S are stacked on the sheet stacking unit 35. Here, in the present embodiment, when the paper S is discharged toward the paper stacking portion 35, the paper S once moves toward the opening 69, then slides on the paper stacking portion 35, and the end guide 35B. (See FIGS. 1 and 2).

  Here, in this embodiment, the sheets S are sequentially discharged to the sheet stacking section 35 by the exit roll 34. At this time, the side portion of the sheet S is pressed by the tamper 38 (see FIG. 1), and the width of the sheet S is increased. Alignment in the direction is performed. Further, the sheet S is transported toward the end guide 35B by the rotating paddle 37 (see FIG. 1), and alignment in the transport direction of the sheet S is performed. With these processes, a sheet bundle composed of a plurality of sheets S and subjected to the edge alignment process is generated on the sheet stacking unit 35.

  Thereafter, a binding process by the stapler 40 is performed on the sheet bundle. The stapler 40 is provided so as to be movable along the end guide 35B as indicated by an arrow 2A in FIG. 2, and in this embodiment, the binding position by the stapler 40 can be changed.

  Thereafter, in the present embodiment, the eject roll 39 advances toward the sheet bundle and rotates. As a result, the sheet bundle moves in the direction indicated by the arrow 2B in FIG. 2 and drops downward after passing through the support member 520. Thereafter, the sheet bundle is stacked on the sheet bundle stacking unit 70. Note that when the binding process performed by the stapler 40 is performed, the binding unit 510 provided in the binding device 500 is retracted to a position off the movement path of the sheet bundle, as indicated by a broken line in FIG. Located in a location that does not interfere with the transport of the stack of paper.

Next, the binding process performed by the binding device 500 will be described.
When the binding process is performed by the binding device 500, the binding unit 510 moves on the sheet bundle conveyance path as shown by the solid line in FIG. In the present embodiment, two binding units 510 are provided, and these two binding units 510 are positioned on the sheet bundle conveyance path.

  After the binding unit 510 moves on the sheet bundle conveyance path, in the present embodiment, stacking of sheets on the sheet stacking unit 35 is started. More specifically, similarly to the above, the sheets S are sequentially discharged to the sheet stacking unit 35 by the exit roll 34 (see FIG. 1). At this time, similarly to the above, the side portion of the paper S is pressed by the tamper 38 (see FIG. 1), and the paper S is aligned in the width direction. Further, the sheet S is transported toward the end guide 35B by the rotating paddle 37 (see FIG. 1), and alignment in the transport direction of the sheet S is performed. Through these processes, a sheet bundle is generated on the sheet stacking unit 35.

  Next, the eject roll 39 advances toward the sheet bundle and rotates. As a result, the sheet bundle moves in the direction indicated by the arrow 2B in FIG. 2 and the leading end thereof reaches the binding unit 510. Thereafter, the binding unit 510 is driven, and the binding process for the sheet bundle is executed. Here, in this embodiment, the binding device 500 is provided on the downstream side in the conveyance direction of the sheet bundle, and the binding process is performed on the downstream end portion (end end side end portion) in the conveyance direction of the sheet bundle. It will be.

  Thereafter, in this embodiment, a unit moving mechanism (not shown) is driven to move the binding unit 510 to a position away from the sheet bundle conveyance path. Specifically, the binding unit 510 moves to a position indicated by a broken line in FIG. 2, and the binding unit 510 is located at a position off the sheet bundle conveyance path. Thereafter, as described above, the eject roll 39 advances toward the sheet bundle and rotates. As a result, the sheet bundle falls downward after passing through the support member 520. Thereafter, the sheet bundle is stacked on the sheet bundle stacking unit 70.

Next, a binding mechanism unit (hereinafter referred to as “binding mechanism unit 570”) that actually performs a binding process on a sheet bundle will be described in detail.
FIG. 3 is a diagram for explaining the binding mechanism 570.
A binding mechanism 570 is accommodated in each of the two binding units 510 described above. The binding mechanism portion 570 is provided with an upper frame 511 and a lower frame 512 disposed below the upper frame 511 as shown in FIG.

  Here, the upper frame 511 is provided with a base 503 and two bases 501 arranged with a predetermined gap as shown in FIG. In the present embodiment, the sheet bundle is bound by moving the base portion 503 closer to the base 501 (moving in the direction of arrow F1 in the figure). In addition, the base 501 has a protruding portion 506 that extends toward the base 503 and is formed integrally with the base 501.

  On the other hand, the lower frame 512 is provided with a bottom member 502 disposed to face the base 501. Two bottom members 502 are provided corresponding to the two bases 501 provided. Further, a hole 512A is formed between the adjacent bottom members 502 in the lower frame 512.

  Here, the base portion 503 includes a blade 504 that cuts the sheet bundle. The base portion 503 has a punching member 505. The punching member 505 forms a tongue 522 (see FIG. 3B) with respect to the sheet bundle, bends the tongue 522, and inserts the tongue 522 into the notch formed by the blade 504.

  The blade 504 is formed of a rectangular plate-like member provided with one end fixed to the base portion 503 and extending toward a hole portion 512 </ b> A formed in the lower frame 512. Further, the blade 504 has a eye hole 504A provided through the blade 504, and further has a tip 504B whose width decreases as it approaches the lower frame 512.

  The punching member 505 is an L-shaped member having a bent portion. The punching member 505 has a main part 505A on one end side and a sub-part 505B on the other end side. Further, the punching member 505 has a rotation shaft 505R at a position where the main portion 505A and the sub portion 505B intersect, and can be rotated around the rotation shaft 505R. More specifically, the main portion 505A can be inclined to the blade 504 side. A gap is provided between the sub part 505B and the base part 503 so that the punching member 505 can rotate.

  The main portion 505A is arranged to extend toward the lower frame 512. Further, the main portion 505A has a blade portion 505C on the side opposite to the side where the rotating shaft 505R is provided, that is, the side where the base 501 is provided. The blade portion 505C has a shape that follows the shape of the tongue portion 522. In addition, the blade is not formed in the edge part located in the blade 504 side among the some edge parts formed in the blade part 505C. For this reason, one end 522A (see FIG. 5B) of the tongue 522 is connected to the sheet bundle, and the tongue 522 and the sheet bundle are continuous. The main portion 505 </ b> A has a protrusion 505 </ b> D that protrudes toward the blade 504 on the side of the main portion 505 </ b> A, specifically, on the side facing the blade 504.

Here, the operation of the binding mechanism 570 will be described.
First, the base 503 approaches the base 501 by a cam driven by a motor (not shown), and the leading end 504B of the blade 504 penetrates the sheet bundle. Further, when the blade portion 505C of the punching member 505 presses the sheet bundle, the punching member 505 penetrates the sheet bundle. Thus, as shown in FIG. 5B, the sheet bundle is formed with a slit 521 and a tongue 522 having one end 522A connected to the sheet bundle. When the base portion 503 is further lowered, the sub-portion 505B of the punching member 505 hits the protruding portion 506, and the punching member 505 rotates in the clockwise direction in FIG. 3A around the rotation shaft 505R.

  As a result, the main portion 505 </ b> A is inclined toward the blade 504, and the protrusion 505 </ b> D of the punching member 505 approaches the blade 504. As a result, the protrusion 505D of the punching member 505 bends the tongue 522 and pushes the tongue 522 into the eye hole 504A of the blade 504 (see F2 in the figure). In FIG. 3C, the punching member 505 is not shown.

  Thereafter, the base 503 is moved away from the lower frame 512. That is, the base 503 is raised in the direction of arrow F3 in FIG. In this case, the tongue 522 rises while being caught in the eye hole 504A of the blade 504. Then, as shown in FIG. 3D, the tongue 522 is inserted into the slit 521. Thereby, the binding process by the binding mechanism unit 570 is completed.

  Here, when the binding process is performed by the binding device 500 (the binding mechanism unit 570), as shown in FIG. 3D, the tongue 522 is positioned on one surface side of the sheet bundle. Further, the base of the tongue 522 is positioned on the other surface side of the sheet bundle, and the tongue 522 is curved so as to bulge outward at the base. As a result, the thickness of the sheet bundle becomes larger in the part of the sheet bundle where the binding process has been performed than in the other parts.

  When such a sheet bundle is stacked on the sheet bundle stacking unit 70, as shown by an arrow 1A in FIG. 1, the stacking height of the sheet bundle becomes an end guide side end (end on the apparatus frame 36 side). And the end portion on the front end side (the end portion located on the opposite side of the end portion on the apparatus frame 36 side). More specifically, the stacking height at the end on the front end side is larger than the stacking height on the end on the end guide side. In such a case, the stacked sheet bundle is easily broken, and the number of stackable sheet bundles is reduced.

  Therefore, in the present embodiment, when the binding process is performed by the binding device 500, as illustrated in FIG. 4 (a diagram illustrating the state of the image forming system 1 when the sheet bundle stacking unit 70 is raised), the sheet bundle stacking is performed. The unit 70 is raised, and the uppermost sheet bundle among a plurality of stacked sheet bundles is pressed against a binding unit 510 as an example of a pressed part.

  More specifically, the portion of the sheet bundle that has been subjected to the binding process and has a large thickness is pressed against the bottom of the binding unit 510. As a result, the portion of the sheet bundle where the thickness is increased (the portion where the tongue 522 is provided) is pressed, and the thickness of each sheet bundle is reduced. In this case, the difference between the stacking height at the end on the front end side and the stacking height at the end on the end guide side is reduced, and the stacked sheet bundle is less likely to collapse. In addition, the number of stackable sheets can be increased.

FIG. 5 is a flowchart showing details of the processing when the binding processing by the binding device 500 is performed. Note that the processing shown in this figure is executed by the control unit 80.
When a binding process is performed by the binding device 500, first, the binding unit 510 (the binding unit 510 indicated by the broken line in FIG. 2) that has been waiting on the side of the movement path of the sheet bundle is indicated by a solid line in FIG. Are moved on the movement path of the sheet bundle (step 101). Next, the control unit 80 determines whether a sheet bundle is loaded on the sheet bundle stacking unit 70 based on the output from the presence / absence detection sensor S2 (see FIG. 1) (step 102).

  When it is determined that the sheet bundle is not placed on the sheet bundle stacking unit 70, the control unit 80 sequentially discharges the sheets S to the sheet stacking unit 35 by the exit roll 34 (see FIG. 1). A sheet bundle is generated on 35 (step 103). When generating the sheet bundle, as described above, the tamper 38 (see FIG. 1) aligns the sheet S in the width direction, and the rotating paddle 37 (see FIG. 1) conveys the sheet S. Alignment is performed.

  Thereafter, the control unit 80 drives the binding device 500 (binding unit 510) to perform a binding process on the sheet bundle (step 104). More specifically, the control unit 80 advances and rotates the eject roll 39 with respect to the sheet bundle. As a result, the sheet bundle moves in the direction indicated by the arrow 2B in FIG. 2, and the leading end of the sheet bundle reaches the binding unit 510. Thereafter, the control unit 80 drives the binding unit 510 to execute a binding process for the sheet bundle.

  Next, the control unit 80 performs a paper bundle discharge process (step 105). Specifically, first, a unit moving mechanism (not shown) is driven, and the binding unit 510 is moved to a position (a position indicated by a broken line in FIG. 2) deviated from the sheet bundle conveyance path. Next, the eject roll 39 is rotated. As a result, the sheet bundle drops downward after passing through the support member 520 (see FIG. 2) and is placed on the sheet bundle stacking unit 70.

  On the other hand, when the control unit 80 determines in step 102 that a sheet bundle is loaded on the sheet bundle stacking unit 70, the control unit 80 executes the same processing as in step 103 and step 104. That is, a sheet bundle is generated (step 106) and a binding process (step 107) by the binding device 500 is executed. In addition, the control unit 80 executes a crushing process for the sheet bundle in parallel with the processes of Step 106 and Step 107 (Step 108).

  Here, in this crushing process, first, the pressure sensor S1 (see FIG. 1) provided at the lower end portion of the binding unit 510 is pressed by the sheet bundle placed on the sheet bundle stacking section 70, and this pressure sensor. The sheet stack stacking unit 70 is raised until S1 is turned on. In addition, the stepping motor provided in the moving mechanism 100 is continuously driven by a predetermined number of steps even after the pressure sensor S1 is turned on. As a result, the portion of the sheet bundle on the sheet bundle stacking unit 70 that has undergone the binding process is sandwiched between the binding unit 510 and the sheet bundle stacking unit 70 and is crushed. Thereafter, the stepping motor is reversed, and the sheet bundle stacking unit 70 is lowered until the pressure sensor S1 is turned off.

  Here, in the present embodiment, during the generation of a new sheet bundle and the binding process for the new sheet bundle, the crushing process of the sheet bundle already placed on the sheet bundle stacking unit 70 is executed. To do. Here, for example, after the crushing process is performed, a new sheet bundle can be generated and a binding process for the new sheet bundle can be executed. In this case, however, the sheet bundle that can be generated per unit time is reduced. . When the processing of this embodiment is performed, the number of sheet bundles that can be generated per unit time can be increased.

  Thereafter, in the present embodiment, similarly to step 105 described above, a sheet bundle discharge process is performed (step 109). In other words, a newly generated sheet bundle is discharged above the sheet bundle stacking unit 70. In this discharge process, similarly to the above, first, a unit moving mechanism (not shown) is driven, and the binding unit 510 is moved to a position (a position indicated by a broken line in FIG. 2) deviated from the sheet bundle conveyance path. Next, the eject roll 39 is rotated. As a result, the sheet bundle falls downward after passing through the support member 520 (see FIG. 2) and is placed on the sheet bundle stacking unit 70.

  In the present embodiment, the case where the sheets (sheet bundle) subjected to the binding process are pressed is taken as an example. However, for example, the staple processing is performed on the center portion of the sheet bundle using staples and the center portion is used. Even when a booklet is created by performing the folding process, a part of the sheet bundle is expanded as described above. Therefore, even when such a booklet is created, the stacking unit can be raised and the booklet can be pressed against a predetermined position located above. In this case, the swelling of the booklet is reduced. In addition, the configuration of the present embodiment is also applied to a sheet (sheet bundle) on which processing other than the binding processing has been performed.

  In this embodiment, the sheet bundle is crushed by using a part of the binding device 500. However, a dedicated member for crushing is attached to the side surface of the apparatus frame 36, and this member and the sheet bundle stacking are attached. The sheet bundle may be sandwiched between the unit 70.

  In this embodiment, the pressure sensor S1 is provided below the binding unit 510. By using this pressure sensor S1, the stacking height of the sheet bundle placed on the sheet bundle stacking unit 70 can be more accurately determined. It becomes possible to grasp. Then, if the sheet bundle stacking unit 70 is moved based on the grasped height, a position that makes the stacked state of the sheet bundle better (a position that is neither too far nor too close from the binding device 500 (see FIG. 1)). The sheet bundle stacking unit 70 can be positioned at ().

  Conventionally, the stack height of a sheet bundle is often grasped by a sensor provided on the apparatus frame 36 side, such as a sensor indicated by reference numeral S3 in FIG. By the way, in this case, when the stacking height at the end on the front end side becomes larger as in this embodiment, it is difficult to accurately grasp the stacking height of the sheet bundle. In this case, when the sheet bundle stacking unit 70 is moved based on the sensor indicated by reference numeral S <b> 3, a state in which the sheet bundle stacking unit 70 is too close to the binding device 500 may occur.

DESCRIPTION OF SYMBOLS 1 ... Image forming system, 3 ... Paper processing apparatus, 5 ... Image forming part, 70 ... Paper bundle stacking part, 100 ... Moving mechanism, 200 ... Stacking part, 500 ... Binding apparatus, 510 ... Binding unit, S ... Paper, S1 ... Pressure sensor

Claims (6)

A stacking unit on which recording material bundles having a portion having a large thickness and a portion having a small thickness are configured by a plurality of recording materials;
Moving means for moving the stacking unit loaded with recording material bundles upward;
A pressed portion that is positioned above the stacking portion and that is pressed against a portion where the recording material bundle having a large thickness placed on the stacking portion that moves upward by the moving means is pressed;
A recording material processing apparatus comprising: The recording material bundle is subjected to a binding process,
The recording material processing apparatus according to claim 1, wherein a portion of the recording material bundle subjected to a binding process is pressed against the pressed portion. Above the stacking unit, there is provided a recording material bundle generation unit that generates a recording material bundle by performing a binding process on a plurality of stacked recording materials.
The recording material processing apparatus according to claim 1, wherein the pressed portion is configured by a part of the recording material bundle generation unit. An image forming unit for forming an image on a recording material;
A recording material bundle generating unit that has a recording material stacking unit in which a plurality of recording materials on which images are formed by the image forming unit are stacked, and that generates a recording material bundle having a portion with a large thickness and a portion with a small thickness; ,
A stacking unit on which the recording material bundle generated by the recording material bundle generating unit is stacked;
Moving means for moving the stacking unit loaded with recording material bundles upward;
A pressed portion that is positioned above the stacking portion and that is pressed against a portion where the recording material bundle having a large thickness placed on the stacking portion that moves upward by the moving means is pressed;
An image forming system comprising: The recording material bundle generating unit is disposed above the stacking unit and performs binding processing on a plurality of recording materials accumulated in the recording material accumulating unit, thereby increasing the thickness of the recording material bundle generating unit. Producing a recording material bundle having a small part,
The pressed portion is constituted by a part of the recording material bundle generating portion,
When a new recording material bundle is generated in the recording material bundle generation unit, the stacking unit is raised, and when the new recording material bundle is generated, the stacking is performed. The image forming system according to claim 4, wherein the pressing of a portion where the thickness of the recording material bundle placed on the portion is large is performed.   6. The sensor according to claim 4, wherein the pressed portion is provided with a sensor for detecting that the thick portion of the recording material bundle is pressed against the pressed portion. The image forming system described in 1.

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