JP3978088B2 - Paper processing apparatus and image forming system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet processing apparatus provided with a punching unit that punches a sheet, and an image forming system in which the sheet processing apparatus and the image forming apparatus are configured integrally or separately.
[0002]
[Prior art]
As this type of technology, for example, (1) the invention described in Japanese Patent Laid-Open No. 2001-25995 is known. The present invention relates to a punch and die for making a hole in a sheet, punch waste conveying means for conveying punch waste generated when the punch and die make a hole in the sheet, and a punch conveyed by the punch waste conveying means. A punch waste box for receiving waste, a screw-type transport device is employed as punch waste transport means, and the punch waste box is detachably provided outside the image forming apparatus main body. When the waste box is removed from the image forming apparatus main body, the driving of the punch waste conveying means is stopped, but the image formation of the image forming apparatus is continued. As a result, punch scraps are not scattered as dust outside the apparatus, and the image forming operation is continued even after the punch scrap box is removed, so that it is possible to increase the productivity of image formation. Yes.
[0003]
In addition, for example, inventions described in (2) Japanese Patent Application Laid-Open No. 7-112681 and (3) Japanese Patent Application Laid-Open No. 6-155393 are also known as devices having means for containing scrap when processed. .
[0004]
In the publication (2), the punch and waste receiving container is configured to be removable from the outside of the image forming apparatus through an opening formed in the side plate of the image forming apparatus main body. An image forming apparatus is disclosed that is configured to be visible from the outside of the apparatus by being formed of the above material. This publication also discloses a configuration in which a punch waste receiving container is disposed on the side surface of the image forming apparatus main body so that punch dust processing can be easily performed from the outside.
[0005]
In the gazette (3), a punch mechanism is attached to an opening / closing cover provided on the side of the copying machine main body, and further, waste that is generated when punch holes are generated in the opening / closing cover by the punch mechanism is stored. A configuration in which a paper tank is detachably provided is disclosed.
[0006]
[Problems to be solved by the invention]
By the way, when a punching operation is performed on the paper transported by the punching unit and the punched scraps fall down, it is necessary to reliably stack the punched scraps on the transport belt of the punching scrap transport unit. For this purpose, at least the length of the perforated waste transport belt for transporting a distance more than the distance between the perforated holes located at both ends of the plurality of perforated holes of the perforating unit (80 mm for domestic 2 holes, 240 mm for 4 European holes, etc.) Is needed. At the same time, it is necessary to dispose a perforated waste conveying belt below the plurality of perforated holes.
[0007]
In addition, when removing perforated scraps, there is a case where it cannot be completely removed from the conveyor belt due to the influence of static electricity.
[0008]
The present invention has been made in view of the actual situation of the prior art as described above, and an object of the present invention is to provide a paper processing apparatus capable of separating perforated waste from a belt-shaped stacking surface at an appropriate location and storing it in a perforated waste storage hopper. And providing an image forming apparatus.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the first means includes an image forming apparatus, a paper conveying means for conveying the paper discharged from the image forming apparatus, and a punching means for punching a paper conveyed by the paper conveying means, Perforating waste transporting means for transporting perforated waste perforated on the image forming apparatus operation side by the perforating means, and the perforated waste transportable distance of the perforated waste transporting means is a perforation hole width at both ends of the perforating means In the paper post-processing apparatus set as described above, the perforated waste transporting means is formed of a belt-shaped transport body, and the shape of the perforated waste stacking surface of the belt-shaped transport body is formed into a shape having intermittent convex portions. The interval is set to be equal to or smaller than the diameter of the drilling waste .
[0011]
The second means is characterized in that, in the first means, the shape of the perforated waste stacking surface of the perforated waste conveying means is formed in a shape that reduces the contact area with the perforated waste.
[0014]
The third means is characterized in that, in the first means, the convex portion is formed in a direction substantially perpendicular to the conveying direction of the drilling waste.
[0015]
The fourth means constitutes an image forming system by providing a sheet processing apparatus according to the first to third means and an image forming apparatus for forming a visible image on a recording medium integrally or separately from the sheet processing apparatus. It is characterized by that.
[0017]
In the 1st thru | or 3rd means, a strip | belt-shaped thing is used as a conveyance means of the said perforation waste conveyance unit, and perforation waste is loaded on it. By making the surface to be loaded into a strip shape, the adhesion of the punched debris due to static electricity or the like is reduced, and the punched debris is easily separated from the strip-shaped stacking surface. Therefore, the perforated waste can be pulled away from the belt-shaped stacking surface at an appropriate location and stored in the perforated waste containing hopper. Therefore, when the perforated waste is not separated from the belt-shaped loading surface at an appropriate location, the perforated waste is not scattered inside and outside the machine without being stored in the perforated waste storage hopper.
Moreover, when using a belt-shaped thing as a conveyance means of a perforated waste conveyance unit, it is possible to use the tooth surface of a timing belt, etc. concretely as a belt-like thing. By using a timing belt that is generally used, the cost can be reduced and the distance between the convex shapes is less than or equal to the size of the perforated waste. There will be no perforation waste. Therefore, the perforated waste is reliably conveyed, and the separation property when dropping to the perforated waste containing hopper is also maintained .
[0019]
In the fourth means, since the paper processing apparatus according to the first to third means is used in the image forming system, the perforated waste can be reliably collected, and the system caused by the perforated waste in the paper processing apparatus. It will not cause a failure.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0021]
《Mechanical configuration》
FIG. 1 is a perspective view illustrating a system configuration of an image forming system including an image forming apparatus PR and a sheet post-processing apparatus FR as a sheet processing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating an internal structure of the image forming system. FIG. In these drawings, the image forming apparatus PR has a copying function, and basically includes an image reading unit 31, an image writing unit 32, a paper feeding unit 33, and a document feeding unit 34. The image reading unit 31 is a known unit that scans in the main scanning direction by a so-called scanner and moves the document in the sub scanning direction to read the document. A document is fed onto the contact glass by a document feeding unit 34, also called an automatic document feeder (ADF), and optically read. The image writing unit 32 includes a known optical system using a laser diode, a polygon mirror, an fθ lens, and the like. The optical writing is performed on the surface of the photosensitive member by the optical system, and the latent image formed by the optical writing is developed with toner. Then, the image is visualized and transferred to a sheet to form an image. The formed image is fixed by the fixing unit and then discharged to the sheet post-processing apparatus FR side by the paper discharge roller 35. In this embodiment, the paper feed unit 33 is provided in four stages. A vertical conveyance path 36 is provided in the paper drawing direction on the right side in the drawing, and the paper drawn from each paper feed stage is supplied to the image writing unit 32.
[0022]
A sheet on which an image has been formed is carried into the sheet post-processing apparatus FR from the direction indicated by the arrow M from the image forming apparatus PR. In the paper post-processing apparatus FR, a punching unit 4 for punching paper transported from the image forming apparatus PR is provided downstream of the entrance roller 1 in the paper transport direction and upstream of the transport roller 6. It has been. Below the punching unit 4, a transporting unit 5 for transporting punched scraps after punching is provided in a direction perpendicular to the paper transporting direction as shown in the schematic configuration diagram taken along line AA in FIG. The transport unit 5 transports perforated waste 23 (see FIGS. 4 and 5) in the perforated waste transport direction Q. The conveying direction Q of the punching scraps 23 is an operation side OP in which the user performs operations, jam processing, and the like. Input processing, or perform toner replacement, paper jam processing, and the like. Toner replacement and paper jam processing are performed by opening the front cover 14 which is a part of the casing of the operation side OP, and the perforated waste storage hopper 3 is provided inside the front cover 14. As a result, the perforated waste is produced in the perforated waste accommodation hopper 3 provided inside the front cover 14. Details of the transport unit 5 for transporting the perforated waste 23 and the perforated waste accommodation hopper 3 will be described later.
[0023]
The paper P punched by the punching unit 4 is transported to each transport path by branching claws 27 and 28 arranged downstream of the transport roller 6, and passes through a processing process such as sorting of the next post-processing process or stipple. To be stacked on the paper discharge tray 9. If it is simple discharge, it is discharged onto the proof tray 29 through the upper conveyance path and stacked.
[0024]
In the case of sorting, the conveyance path on the conveyance roller pair 7 side is opened by the branching claw 27, and the conveyance path on the conveyance roller pair 10 side is closed by the branching claw 28, thereby discharging to the discharge tray 9 side having a shift function. The paper is discharged via the paper roller pair 8. The shift function is a function for sorting the paper discharge tray 9 for each copy by moving the discharge tray 9 for each copy in a direction orthogonal to the paper transport direction.
[0025]
In the case of stipple, the conveyance path on the conveyance roller pair 7 side is opened by the branch claw 27, the conveyance path on the conveyance roller pair 10 side is opened by the branch claw 28, and the sheet is transferred from the staple discharge roller 11 to the staple tray 12. Is ejected. In the staple tray 12, the paper is struck down to the trailing edge fence side by tapping roller, and the edge of the paper in the direction perpendicular to the paper discharge direction is aligned with the jogger fence. The end of the sheet (rear end in this case) is bound, the sheet bundle bound to the discharge roller pair 8 side is pushed up by the discharge belt, and discharged to the shift tray 9.
[0026]
As described above, since the punching unit 4 and the punching waste storage hopper 3 are arranged in the uppermost stream of each post-processing step, basically, any paper can be punched, and the punched paper can be used as it is. The paper can be discharged to the proof tray 29 or the shift tray 9 and sorted, or the punched paper can be bound and discharged to the shift tray 9.
[0027]
FIG. 4 is a diagram showing details of the punching unit 4 and the punching waste storage hopper 3. The punching unit 4 punches the sheet conveyed from the direction of arrow M in FIG. The punching mechanism of the punching unit 4 is a press punch method (FIGS. 10 and 11) in which punching is performed by moving the punching blade 15 in the direction perpendicular to the sheet transport direction (up and down movement) after stopping the sheet at a predetermined position. However, a rotary punch method (FIGS. 12 and 13) in which punching is performed by rotating the punching blade 15 so as to synchronize with the transport speed of the paper while transporting the paper may be used. The perforated waste 23 that has been separated from the paper perforated by any of the perforating means and has fallen is removed from the perforated waste accommodation hopper 3 disposed on the front cover 14 side by the perforated waste transport unit 5 provided further below the paper guide 15a. It falls inside and is contained.
[0028]
FIG. 5 is a schematic configuration diagram showing details of the perforated waste transport unit 5 and the positional relationship among the perforated waste transport unit 5, the perforated unit 4, and the perforated waste storage hopper 3. In the figure, the paper guided to the paper guide 15a and conveyed to the position of the punching blade 15 is stopped at the punching position and punched by lowering the punching blade 15 to the paper side. The perforated waste 23 generated by punching by the perforated blade 15 falls onto the perforated waste transport belt 18 of the perforated waste transport unit 5 provided below the paper guide 15a. The perforated waste transport belt 18 is stretched in a state where a predetermined tension is applied between the driven timing pulley 17 and the driving timing pulley 19, and the perforated waste transport belt 18 on which the perforated waste 23 has fallen is shown in FIG. In the direction of arrow Q (perforation waste conveyance direction), and along with this, the perforation waste 23 is conveyed to the operation (front cover 14) side OP. The perforated scrap conveying belt 18 is engaged with a worm 20 by a worm wheel 19a integrated with a driving-side timing pulley 19, and rotates counterclockwise in the figure by the rotation of the worm 20, whereby the conveying scrap 23 is moved in the Q direction. Can be transported. The worm 20 is rotationally driven from the stepping motor 22 via the timing belt 21. The perforated waste 23 conveyed to the operation side OP by the perforated waste conveying belt 18 passes through the guide of the perforated waste guide 16 and falls into the perforated waste accommodating hopper 3 and is accommodated. The perforated waste storage hopper 3 is mounted on the inner side of the openable front cover 14 (inside the paper post-processing apparatus) in a detachable configuration.
[0029]
FIG. 6 is a diagram showing details of the perforated waste storage hopper 3 that is mounted on the inner side of the front cover 14 that can be opened and closed (here, the inner surface 14d of the front cover 14) in a removable manner. A magnet 25 is mounted on the perforated waste storage hopper 3 and is magnetically attracted and held by a bracket 24 attached or embedded on the inner surface 14d of the front cover 14 that can be opened and closed. In addition, positioning pins 14a and 14b are provided on a part of the inner surface 14d of the front cover 14 as a guide for relative positioning of the front cover 14 and the perforated waste storage hopper 3 when magnetically attracted. Positioning holes 3 a and 3 b are provided on the side surface of the perforated waste storage hopper 3. As a result, the positioning holes 3 a and 3 b are inserted into the positioning pins 14 a and 14 b, and the drilling waste storage hopper 3 is held by the magnet 25 and the bracket 24. Thereby, the positioning pins 14 a and 14 b function as a guide for the perforated waste accommodating hopper 3. It should be noted that the magnet 25 needs to have a magnetic attractive force sufficient to hold the perforated waste accommodating hopper 3 when the perforated waste accommodating hopper 3 is full. In consideration, the adsorption force sufficient to hold the above is sufficient. The front cover 14 is also opened and closed during jamming and toner replacement. At that time, the perforated waste storage hopper 3 vibrates, and the piles of the perforated waste 23 accumulated in the chevron shape collapse and are leveled. The amount of storage up to increases.
[0030]
7 and 8 are main part plan views showing the punch waste transport mechanism of the paper post-processing apparatus FR. FIG. 7 shows a normal use state in which the front cover 14 is closed, and FIG. 8 shows that the front cover 14 is opened. Each state is shown. As can be seen from FIG. 8, the front cover 14 is provided so as to be rotatable around a support shaft 26 provided on the left side when viewed from the operation side OP of the sheet post-processing apparatus FR main body. When the front cover 14 is in an open state, the perforated waste storage hopper 3 is also integrally opened, and when the front cover 14 is in a closed state, it is integrally closed.
[0031]
When the front cover 14 is in a closed state, the perforated waste storage hopper 3 is in a state where the conveyance path is blocked when viewed from the operation side OP as shown in FIG. 2, and temporarily opens and closes the conveyance guide plate by jamming or the like. Even so, the perforated waste storage hopper 3 is fixed at the position shown in FIG. Therefore, when the front cover 14 is opened by jamming or the like, the perforated waste storage hopper 3 needs to move together with the front cover 14. In other words, if the perforated waste storage hopper 3 also moves with the front cover 14 open and does not obstruct jamming or the like, the perforated waste storage hopper 3 can be enlarged, and the perforated waste storage capacity can be increased. Can be increased.
[0032]
<Electrical configuration>
As shown in FIG. 9, the control device 350 includes a microcomputer having a CPU 360, an I / O interface 370, etc., and includes switches on the control panel of the image forming apparatus PR main body, the inlet sensor 2, and the discharge tray 9. For discharging the paper to the CPU 360, signals from each sensor such as a sensor for detecting the paper surface height on the paper discharge tray 9 are input to the CPU 360 via the I / O interface 370.
[0033]
Based on the input signal, the CPU 360 operates in the vertical direction of the punching blade 15 of the punching (punch) unit 4, the transporting operation of the punching waste transporting unit 5, and the alignment in the direction orthogonal to the paper transporting direction in the staple tray 12. Operation (jogging operation), binding operation by the staple unit 13, discharge operation of the bundle of sheets after binding, raising / lowering operation of the discharge tray 9, and paper in the rear end fence side in order to align the direction parallel to the conveyance direction of the sheet Control each motion such as the motion of the tapping roller. A pulse signal of a not-shown staple conveyance motor that drives the staple discharge roller 11 is input to the CPU 360 and counted, and the hitting roller and jogging operation are controlled according to this count.
[0034]
The sheet post-processing apparatus FR is controlled by the CPU 360 executing a program written in a ROM (not shown) while using a RAM (not shown) as a work area.
[0035]
《Press punch method》
FIG. 10 is an operation explanatory view showing a punching operation when the punching unit 4 adopts a press punch type, and FIG. 11 is a schematic configuration diagram showing a drive system of a press mechanism for performing press for punching. FIG. 10 (a) shows the initial state, FIG. 10 (b) shows the state in which drilling has started, FIG. 10 (c) shows the state at the time of drilling, FIG. 10 (d) shows the state immediately after the end of drilling, FIG. 4E shows the state returned to the initial state.
[0036]
As shown in FIG. 11, the punching blade 15 operates perpendicularly to the paper P conveyed by the cam 30 that rotates about the shaft 31, and punches the paper P in the state shown in FIG. . At that time, punching is performed on the paper P in a state where the paper P is stopped after a certain time after the trailing edge of the paper P passes through the inlet sensor 2 in FIG. At that time, the cam 30 that is pivotally attached to the shaft 31 and rotates integrally with the shaft 31 pushes down the inner wall of the holder 32 that is in contact with the outer peripheral surface of the cam 30 to the sheet P side by rotating about the shaft 31. . The pushed-down holder 32 pushes down the punching blade 15 engaged with the holder 32 toward the paper P, and punches through the paper P.
[0037]
A pulley 33 is attached to the shaft 31 and is rotated by driving from a stepping motor 34 via a timing belt 35. The pulley 33 is driven from the shaft 31 by always rotating the pulley 33 with the stepping motor 34 via the timing belt 35 and transmitting it to the shaft 31 with a one-rotation clutch when necessary, or stopping and driving the stepping motor 34. It is also possible to configure so as to transmit to the shaft 31 repeatedly.
[0038]
《Rotary punch method》
FIG. 12 is an operation explanatory view showing a punching operation when a rotary punch type is used for the punching unit 4, and FIG. 13 is a schematic configuration diagram showing a drive system of the rotary mechanism. FIG. 12 (a) shows the initial state, FIG. 12 (b) shows the state in which drilling has started, FIG. 12 (c) shows the state at the time of drilling, FIG. 12 (d) shows the state immediately after finishing drilling, FIG. 4E shows a state rotated 90 ° from the time of drilling.
[0039]
As shown in FIG. 13, the drilling blade 15 rotates about the shaft 36. On the other hand, a die 38 is provided at a position to be paired with the drilling blade 15, and the die 38 rotates around the shaft 37. The punching blade 15 and the die 38 are rotated in accordance with the conveyance operation of the paper P after a predetermined number of pulses have passed since the trailing edge of the conveyed paper P has passed the entrance sensor 2 of FIG. The paper is punched in the state shown in FIG. That is, the punching blade 15 and the die 38 are mounted on rotating bodies that are paired with the paper P interposed therebetween, and the rotating bodies rotate about the shaft 36 and the shaft 37. Gears 39 and 40 are mounted on the center shafts 36 and 37 of the punching blade 15 and the die 38, respectively, and rotation is transmitted by meshing of both gears. Further, driving is transmitted from the stepping motor 41 to the gear 39 on the perforating blade 15 side via the timing belt 42.
[0040]
In this rotary punch type punching unit 4, the punching operation can be performed without stopping the paper, so that it is not necessary to consider the image forming speed of the image forming apparatus, and it is not necessary to stop the paper P. , Control becomes easy.
[0041]
It is also possible to provide the aforementioned perforated waste storage hopper 3 with means for detecting the fullness of the perforated waste 23 and means for detecting whether or not the perforated waste accommodation hopper 3 is set at a predetermined position.
[0042]
14 and 15 are diagrams showing specific dimensions of punches having two holes and four holes. In the case of two domestic holes in FIG. 14, the interval between the punching blades 15 is set to 80 mm according to the standard. The perforated waste 23 generated by the vertical movement of the perforated blade 15 is dropped and stacked on the lower perforated waste transport belt 18, but the perforated waste transportable distance of the perforated waste transport belt 18 is at least the interval of the perforated blade 15. It is configured to exceed a certain 80 mm. In addition, since the perforated waste transport belt 18 is always disposed below the perforating blade 15, the falling perforated waste 23 is always stacked on the perforated waste transport belt 18.
[0043]
Similarly, in the case of the four European holes shown in FIG. 15, the distance between the punching blades 15 at both ends is set to 240 mm, so the length of the punching waste transport belt 18 is set to a length having a longer transportable distance. ing.
[0044]
FIG. 16 shows a detailed shape of the perforated waste transport belt 18 in consideration of peelability. In this embodiment, a concavo-convex portion is formed on the surface of the perforated waste conveyance belt 18. Further, since the width A of the concave portion of the perforated waste transport belt 18 is smaller than the maximum diameter B of the perforated waste 23, the perforated waste 23 does not completely enter the concave shape. Accordingly, the perforated waste 23 does not come into close contact with the perforated waste transport belt 18, and the separation property when the perforated waste 23 is dropped to the perforated waste containing hopper 3 after the perforated waste 23 is transported is maintained. In FIG. 16, the convex portion is indicated by 18-a and the concave portion is indicated by 18-b.
[0045]
FIG. 17 is a view showing a modified example of FIG. 16. In this example, a timing belt that is inexpensive in cost is used as the perforated dust conveyance belt 18. Therefore, an uneven portion of the timing belt tooth surface is formed in a direction orthogonal to the perforated dust conveyance direction of FIG. The separation of the perforated waste 23 is better when the uneven portion is formed in that direction.
[0046]
Here, the timing belt used for the perforated waste conveying belt 18 may be one having both tooth surfaces, or one having one tooth surface may be turned upside down. However, in the case of the timing belt of both tooth surfaces, it is expensive in terms of cost and disadvantageous in terms of space since the thickness is increased. On the other hand, such a demerit can be overcome in the case of a single-toothed timing belt. When a single-tooth timing belt is used, a flat surface is stretched over the timing pulleys 17 and 19 to be driven with tension, so that the rotation speed is low so that the timing belt does not idle due to slip. There is a need.
[0047]
【The invention's effect】
As described above, according to the present invention, since the shape of the punched scrap stacking surface of the punched scrap conveying means is formed to reduce the contact area with the punched scrap, the adsorption force due to static electricity is reduced accordingly. The perforated waste can be pulled away from the belt-shaped stacking surface at an appropriate location and can be securely stored in the perforated waste storage hopper .
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a system configuration of an image forming system including an image forming apparatus and a sheet post-processing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an outline of an internal configuration of an image forming system including an image forming apparatus and a sheet post-processing apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic configuration diagram in a cross section taken along line AA of FIG. 2;
FIG. 4 is a diagram showing details of a drilling unit and drilling waste storage hopper.
FIG. 5 is a schematic configuration diagram showing the details of the perforated waste transport unit and the positional relationship among the perforated waste transport unit, the perforating unit, and the perforated waste storage hopper.
FIG. 6 is a diagram showing details of a perforated waste storage hopper mounted in a removable configuration on the inner side of the front cover that can be opened and closed (inside the sheet post-processing apparatus).
FIG. 7 is a plan view of a main part showing a punch waste transport mechanism of the paper post-processing apparatus in a normal use state in which the front cover is closed.
FIG. 8 is a plan view of a principal portion showing a punch waste transport mechanism of the paper post-processing apparatus in a state where a front cover is opened.
FIG. 9 is a block diagram showing an electrical configuration of the sheet processing apparatus according to the embodiment of the present invention.
FIG. 10 is an operation explanatory view showing a punching operation when a press punch type is used for the punching unit.
FIG. 11 is a schematic configuration diagram showing a drive system of a press mechanism that performs pressing for punching.
FIG. 12 is an operation explanatory diagram showing a punching operation when a rotary punch type is used for the punching unit.
FIG. 13 is a schematic configuration diagram showing a drive system of a rotary mechanism.
FIG. 14 is a diagram specifically showing the relationship between the punch distance in the case of two holes and the transport distance.
FIG. 15 is a diagram specifically illustrating the relationship between the distance between the end portions of the punch and the conveyance distance in the case of four holes.
FIG. 16 is a diagram illustrating a detailed shape of a conveyor belt having a convex portion.
17 is a diagram illustrating an example in which a general-purpose timing belt is used as the conveyance belt in FIG.
[Explanation of symbols]
3 Drilling waste storage hopper 3a Opening 4 Drilling unit 5 Transport unit 14 Front cover 14a, 14b Positioning pin 14c Window 15 Drilling blade 16 Drilling scrap guide 18 Drilling scrap transport belt 23 Drilling scrap 25 Magnet 350 Controller 360 CPU
FR paper post-processing apparatus PR image forming apparatus

Claims (4)

An image forming apparatus and a sheet conveying means for conveying the sheet discharged from the image forming apparatus;
Perforating means for perforating paper conveyed by the paper conveying means;
Drilling waste transporting means for transporting drilling waste punched on the image forming apparatus operation side by the punching means ,
In the paper post-processing apparatus in which the perforated waste transportable distance of the perforated waste transporting unit is set to be equal to or larger than the perforated hole widths at both ends of the perforated unit,
The perforated waste conveying means is composed of a belt-like conveying body,
The perforated scrap stacking surface shape of the belt-like transport body is formed into a shape having intermittent convex portions,
A paper processing apparatus, wherein a distance between the convex portions is set to be equal to or less than a diameter of perforated waste .   2. The sheet processing apparatus according to claim 1, wherein the shape of the punching waste stacking surface of the punching waste transporting unit is formed to reduce the contact area with the punching waste. The paper processing apparatus according to claim 1, wherein the convex portion is formed in a direction substantially perpendicular to a conveying direction of the perforated waste . A sheet processing apparatus according to any one of claims 1 to 3,
An image forming apparatus for forming a visible image on a recording medium;
Is formed as a single body or as a separate body .

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