JP2005007539A - Sheet processing device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet processing device capable of preventing a press-in dust box from being determined as full while leaving a large load capacity, and certainly storing sheet dust to an acceptable load capacity, by providing a pressure mechanism that directly presses in the sheet dust in the dust box and moves. <P>SOLUTION: In order to solve the above-mentioned problem, the sheet processing device and a representative structure of the sheet processing device comprises a carrying means for carrying a sheet, a cutting mechanism for cutting an end side of the sheet, the dust box for storing the sheet dust generated at the time of cutting, and the pressure mechanism for pressing in the sheet dust loaded in the dust box. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet processing apparatus that performs predetermined post-processing on a sheet discharged from an image forming apparatus, and more particularly to a sheet processing apparatus that performs cutting.
[0002]
[Prior art]
2. Description of the Related Art In recent years, sheet processing apparatuses such as a sorter for sorting image-formed sheets have been developed and provided as options for image forming apparatuses such as electrophotographic copying machines and laser beam printers. In this type of sheet processing apparatus, not only a sorting function but also a stapler that stacks and aligns a certain number of sheets and staples them, or a sheet punching process that forms punch holes for files on the sheets is added. It is becoming diverse. Furthermore, when the sheet bundle is formed by the needle binding mechanism, the uniformity of the side surfaces of the sheet bundle may not be obtained due to the misalignment of each sheet of the sheet bundle, and this uniformity is maintained. For this reason, a sheet cutting mechanism for cutting the vicinity of an arbitrary side surface of the sheet bundle by using a cutting blade and adjusting the side surface may be added.
[0003]
Here, a conventional sheet cutting mechanism will be described. For example, Japanese Patent Laid-Open No. 2003-76086 has a sheet cutting mechanism that automatically moves the cutting blade. A finisher that is a sheet processing apparatus in the prior art is a sheet cutting mechanism that receives sheets discharged from an image forming apparatus, stacks and aligns them on a processing tray, and then performs binding processing with a stapler according to a processing mode. The edge of the sheet is cut by the cutting mechanism. The cut sheet waste is dropped.
[0004]
[Problems to be solved by the invention]
However, the conventional sheet cutting mechanism has the following problems. When stacking the sheet waste generated by cutting the sheet bundle with the cutting blade, the sheet scrap has a strip shape, so that a large air layer is present in the stacked part, There have been cases where they are loaded one after another (for example, Patent Document 1).
[0005]
Therefore, the present invention is provided with a dust box and further provided with a pusher mechanism that directly pushes the sheet waste in the dust box, thereby preventing the detection of full load while leaving a large load capacity of the pushed dust box, and reliably allowing it. An object of the present invention is to provide a sheet processing apparatus capable of storing sheet scraps up to a stacking amount. It is another object of the present invention to provide a sheet processing apparatus that can eliminate the full load detection means using a conventional transmission sensor by performing full load detection using the control circuit of the pusher mechanism.
[0006]
[Patent Document 1]
JP2003-76086 (6 pages, FIG. 1)
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a typical configuration of a sheet processing apparatus and a sheet processing apparatus according to the present invention includes a conveying unit that conveys a sheet, a cutting mechanism that cuts an edge of the sheet, and a cutting mechanism. A dust box for storing generated sheet waste, and a pusher mechanism for pushing in the sheet waste stacked in the dust box are provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[First embodiment]
A first embodiment of a sheet processing apparatus and an image forming apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a main cross-sectional view of an image forming apparatus and a sheet processing apparatus according to the present embodiment. First, the overall configuration of the image forming apparatus and the sheet processing apparatus will be described, and the sheet cutting mechanism will be described later.
[0009]
(Image forming device)
A document feeder 2 is attached to the image forming apparatus main body 1 shown in FIG. Documents are placed on the document placing unit 3 and are sequentially separated and fed one by one by the feeding unit 4. Subsequently, the roller is temporarily stopped by the registration roller pair 5, and the skew is corrected by forming a loop. Thereafter, the image formed on the surface of the document is read by passing through the introduction path 6 and passing through the reading position 7. The document that has passed the reading position 7 passes through a discharge path 8 and is discharged onto a discharge tray 9. When reading both the front and back surfaces, first, the reading of the surface is performed by passing the reading position 7 as described above, and then the registration roller is again set in a state where the front and back are reversed by the reverse roller pair 10 through the discharge path 8. Similarly to the front surface reading, the skew is corrected by the registration roller pair 5, and the image formed on the front surface (in this case, the back surface) is read at the reading position 7 through the introduction path 6. Then, it passes through the discharge path 8 and is discharged to the discharge tray 9.
[0010]
In the image forming apparatus main body 1, the reflected light obtained by irradiating the original image passing through the reading position 7 using the illumination system 11 is projected onto the optical element 13 (CCD or other element) or the photosensitive member by the mirror 12. To record an image. The photosensitive drum 14 is irradiated with light corresponding to the recorded document image to form a latent image, and further, a toner image is formed by toner supplied from a toner supply device (not shown). A sheet which is a recording medium such as paper or plastic film is accommodated in the cassette 15. In response to the recording signal, the sheet is supplied from the cassette 15 to a position facing the photosensitive drum 14, and the toner image formed on the photosensitive drum 14 is transferred onto the sheet by the transfer device 16. Then, the sheet on which the toner image is transferred is sent to the fixing device 17 and fixed. When images are formed on both sides of the sheet, the sheet on which the image on one side is fixed by the fixing device 17 passes through the double-sided path 18 provided on the downstream side of the fixing device 17 and again between the photosensitive drum 14 and the transfer device 16. And a toner image is formed on the back surface. Then, the toner image is fixed by the fixing device 17 and discharged to the outside (finisher 19 side).
[0011]
(Sheet processing equipment)
A finisher 19 as a sheet processing apparatus is engaged with the image forming apparatus main body 1 to constitute an image forming apparatus such as a copying machine or a printer. The sheet discharged from the discharge roller 21 of the image forming apparatus main body 1 is received by the conveyance guide pair 20 and guided to the finisher 19. A sheet detection sensor S <b> 1 is provided in the vicinity of the conveyance guide pair 20 and detects a sheet that has entered the finisher 19. The sheet is nipped and conveyed by the discharge roller pair 22 and discharged and stacked on the processing tray 23 as a stacking unit. On the processing tray 23, alignment plates 24 are arranged on both sides in the width direction intersecting with the conveyance direction of the discharged sheet, and guide both ends of the sheet to perform width alignment. The trailing edge of the sheet discharged to the processing tray 23 and falling by its own weight is received by the stopper 25.
[0012]
When a predetermined number of sheets are stacked and aligned on the processing tray 23 to form a sheet bundle, the sheet is discharged to the lifting tray 40 by the conveying belt 31 and the conveying upper roller 33 as conveying means (in the direction of arrow a) or further processing. Therefore, it is conveyed toward the stapler 34 (in the direction of arrow b). In the stack mode in which a plurality of sheets are simply aligned and discharged, the sheet is conveyed as it is in the direction of arrow a and discharged onto the lifting tray 40.
[0013]
In the staple mode in which the formed sheet bundle is stapled and then discharged, the stapler 34 performs one or more binding processes on the end of the sheet on the processing tray 23 after completion of alignment. In this embodiment, a staple motor and a staple shift motor (not shown) are driven to move the stapler 34 to perform one-point binding or two-point binding. After the binding process is completed, similarly to the stack mode described above, the sheet is transported and stacked on the lifting tray 40 by the transport upper roller 33 and the transport belt 31.
[0014]
In the cutting process mode in which the formed sheet bundle is bound and then cut and then discharged, the sheet bundle subjected to the binding process (stitching) at a predetermined position by the stapler 34 is returned by the reverse flapper 42. It is guided to the reversing roller 43 (arrow c direction) and sent to the cutting mechanism 44 with the leading and trailing ends in the transport direction being switched (arrow d direction). This is because the sheet bundle is aligned at the leading edge in the conveyance direction in the processing tray 23, and therefore it is easy to staple the leading edge in the conveyance direction in the stapler 34, and the cutting mechanism 44. This is because although it is necessary to cut the edge opposite to the needle punching, it is also easy to apply cutting to the front end in the conveying direction because it is necessary to discard the sheet waste.
[0015]
The sheet bundle is guided to the cutting mechanism 44 by a switching flapper 91 and an introduction / discharge roller 45 as an example of a conveying unit, and the leading edge is detected by the cutting sensor S5 and stopped at a predetermined cutting position. The cutting mechanism 44 includes a moving unit 48 provided with a pressing member 46 for firmly fixing a sheet held at a predetermined cutting position and a cutting blade 47 for cutting the sheet. A dust box 49 for storing sheet waste generated by the cutting process is disposed below the cutting position of the cutting mechanism 44. The sheet bundle whose edge has been cut is conveyed by the introduction discharge roller 45 and the switching flapper 91 whose rotation direction is reversed, and discharged and stacked on the stack tray 51 by the discharge roller 50.
[0016]
(Sheet cutting mechanism)
Next, the configuration of the sheet cutting mechanism will be described. 2A is a plan view of the cutting mechanism 44 viewed from above, FIG. 2B is a side view of the cutting mechanism 44 viewed from the cutting blade 47 side, and FIG. 3 is a view for explaining the vicinity of the cutting blade. is there.
[0017]
The cutting blade 47 is given a constant urging force by a spring and is attached to the moving unit 48. The moving unit 48 is movable along a guide shaft 63 mounted in parallel to cut an arbitrary side surface of the sheet. The guide shaft 63 is supported by side plates 64 and 65, and the side plates 64 and 65 are fixedly disposed on the sheet holding base 62. A part of the belt 66 is fixed to the moving unit 48. The belt 66 is disposed so as to stretch between the belt gear 67 and the second belt gear 68, and a pulley 70 attached to the output shaft of the moving unit motor 69 is engaged with the second belt gear 68 via an intermediate gear. is doing. As a result, the moving unit motor 69 is rotated forward and backward, and the driving force is transmitted via the second belt gear 68 and the belt 66, and the cutting blade 47 can be moved together with the moving unit 48.
[0018]
Photosensors S6a, S6b, and S6c are attached to a part of the holding table 62 that holds the sheet. By providing the light shielding plate 71 in a part of the moving unit 48, the moving unit 48 moves and stops. Can be controlled. The pressing member 46 is engaged with the slide plate 72 via a spring, and the slide plate 72 is provided with a threaded portion so that the screw groove of the screw shaft 73 can be engaged. A gear 74 is fixed to the screw shaft 73, and a belt 75 is stretched between the gears 74 fixed to the two screw shafts 73. One gear 74 is engaged with a pulley 77 attached to the output shaft of the pressing member shift motor 76. The rotation of the pressing member shift motor 76 is transmitted to the screw shaft 73 via the pulley 77 and the gear 74. A light shielding plate 78 is formed on a part of the slide plate 72. By using a pressing member sensor S7 composed of a photosensor attached to a part of the side plate 64, the home position and the lowering amount of the pressing member 46, etc. It is possible to control.
[0019]
When cutting, the pressing member shift motor 76 starts to drive, and rotates the screw shaft 73 engaged through the gear 74 and the like. As a result, the slide plate 72 in the home position and the pressing member 46 that is provided on the slide plate 72 via the spring and can always apply a constant pressing pressure to the sheet bundle are arranged in the sheet bundle at a predetermined cutting position. Move it down and hold the sheet bundle in place.
[0020]
2 is driven, and the moving unit 48 at the home position (solid line position in FIG. 2) is moved in the direction of arrow E, so that the cutting blade attached to the moving unit 48 as shown in FIG. 47 gradually cuts the vicinity of an arbitrary side of the sheet bundle. The moving unit 48 that has moved in the direction of arrow E in FIG. 2 stops when the light-shielding plate 71 attached to a part of the moving unit 48 shields the photosensor S6c. As shown in the enlarged view of FIG. 3, the sheet receiving seat 79 is rotated to remove the sheet waste loaded thereon into the dust box 49.
[0021]
In the cutting machine used in this experiment, up to 10 sheet bundles are cut by the sliding movement of the cutting blade 47 for performing a single cutting process. Therefore, when cutting several tens of sheet bundles, several reciprocating sliding movements of the cutting blade 47 are required accordingly. When trying to cut a bundle of several tens of sheets in a single cutting process, a considerable burden is placed on the motor that gives the driving force to the moving unit 48, which causes problems such as high cost and increased rigidity. It is because it ends up.
[0022]
When the cutting process is completed, the pressing member shift motor 76 is reversely rotated in a direction to release the pressing member 46 from the sheet bundle, and the pressing member 46 is returned to the home position. Thereafter, the switching flapper 91 is moved from the position biased to the solid line position in FIG. 1 by a spring (not shown) to the one-dot chain line position. Then, when the cutting and conveying drive motor starts to be driven, the introduction / discharge roller 45 starts rotating, and the sheet bundle after the cutting process is conveyed to the switching flapper 91 and the discharge roller 50. The sheet bundle that is nipped and conveyed by the discharge roller 50 that rotates together with the introduction discharge roller 45 is finally discharged to the stack tray 51 and stacked.
[0023]
(Pusher mechanism)
Next, the configuration of the pusher mechanism in the dust box 49 of the cutting mechanism 44 will be described. 4A is a side sectional view of the dust box 49, FIG. 4B is a front sectional view of the dust box 49, FIG. 5 is a control block diagram of the finisher 19, and FIG. 6 is a flowchart for explaining a full load detection sequence. The pusher mechanism is a mechanism that is present in the dust box 49 for accumulating sheet waste generated after cutting, and prevents the sheet waste from leaning on the wall surface of the dust box 49 and curling.
[0024]
As shown in the figure, there is a sheet receiving seat 79 in the vicinity of the cutting blade 47, and the sheet receiving seat 79 can be moved in the arrow X direction by driving a sheet receiving seat rotating motor (not shown). The sheet waste drops by the rotation of the sheet receiving seat 79 in the X direction, and a dust box 49 is provided at a position for receiving the sheet waste. In the dust box 49, push arms 80 and 81 as examples of pushing means are attached as shafts 82 and 83, respectively. A gear 84 is engaged with one end of the shaft 82 and is connected to a pulley 86 attached to a pusher motor 85 as a driving means of the pushing means, and the drive of the pusher motor 85 is transmitted to the shaft 82. The drive of the pusher motor 85 is transmitted to the shaft 83 attached to the push arm 81 in the same manner as it is transmitted to the shaft 82 attached to the push arm 80.
[0025]
A light shielding plate 87 is provided at the other shaft end of the shaft 82, and the home position of the push arm 80 (solid line in the figure) is confirmed by shielding the home position sensor S9 by the light shielding portion of the light shielding plate 87. Yes. Further, an encoder 88 is mounted on the output shaft of the pusher motor 85, and a pusher motor clock sensor S10 is provided in the vicinity thereof.
[0026]
The amount of movement of the push arm 80 for pushing the sheet waste into the dust box 49 (the position indicated by the one-dot chain line in the figure) and the time of movement thereof are detected by detecting the pulse amount of the encoder 88 by the pusher motor clock sensor S10. You can see how much time it took to move from the home position by the set number of pulses. That is, the encoder 88 and the pusher motor clock sensor S10 constitute a movement detection unit that detects a movement time with respect to a predetermined movement amount of the push arms 80 and 81. This information exists in the finisher 19 and can be recognized by the CPU (see FIG. 5) of the control block 100 that controls the drive of the entire apparatus.
[0027]
Further, as shown in FIG. 5, the CPU of the control block 100 includes a sheet detection sensor S <b> 1 that confirms the carrying of the sheet into the finisher 19, a paper surface detection sensor S <b> 2 that detects the top surface of the sheet on the lifting tray 40, and a staple sensor. S3, a reversing sensor S4 for detecting a sheet to be reversed, a cutting sensor S5 for detecting a cutting stop position in the cutting mechanism 44, a moving unit sensor S6 for controlling movement and stop of a moving unit provided with a cutting blade, and a pressing member 46, a pressing member sensor S7 for detecting the home position, a discharge sensor S8 for confirming that the cut sheet bundle has been discharged to the stack tray 51, and a home position sensor S9 for detecting the home positions of the push arms 80, 81. Encoder attached to the output shaft of pusher motor 85 It is connected to the pusher motor clock sensor S10 in order to detect the pulse of 88. The CPU reads a program corresponding to, for example, the flow shown in FIG. 6 stored in the memory ROM based on the detection signal from each sensor, and describes the present embodiment with reference to the data stored in the memory RAM. In addition to controlling the rotation of each motor, excitation control of each pressure contact solenoid is also performed.
[0028]
(Explanation of pusher mechanism operation)
Next, the operation of the pusher mechanism will be described.
[0029]
As described above, the sheet waste generated by cutting with the cutting blade 47 is caused to fall into the dust box 49 by rotating the sheet receiving seat 79 in the direction of arrow X in FIG. Next, the pusher motor 85 is rotated, and the push arms 80 and 81 in the solid line position in FIG. 4 are moved to the one-dot chain line position. Further, after the pusher motor 85 is stopped, the pusher motor 85 is reversed to return the push arms 80 and 81 to the solid line position. By this series of operations, the sheet waste accumulated in the dust box 49 can be pushed in. As a result, leaning on the wall surface of the dust box 49 due to accumulation of sheet waste and prevention of empty stacking space due to rounding of the sheet waste Can be performed reliably. Therefore, when a full load detection means using a transmission sensor or the like is used, it is possible to provide a device that does not cause the erroneous detection.
[0030]
In addition, an encoder 88 is provided on the output shaft of the pusher motor 85, and the pusher motor clock sensor S10 detects the output pulse amount so that the pusher motor 85 moves the push arms 80 and 81 from the solid line position in FIG. It is possible to detect a movement amount and a movement time when moving. The detection signal is sent to the abnormality detection means existing in the CPU in the finisher 19 to determine whether the operation is normal or abnormal for each operation. Then, the movement time is abnormal with respect to the movement amount (here, if a large amount of sheet waste enters the dust box, a large force is required when the push arm is pushed in. If it happens to be long), it will be judged full. That is, by making this determination process using the control circuit of the pusher mechanism as the full load detection means, the full load detection means using a transmission sensor or the like which has been conventionally required can be made unnecessary.
[0031]
The operation of the embodiment having the above configuration will be described in detail with reference to FIG. 6. First, the CPU performs image formation and sheet cutting operation (S <b> 201) to drop the sheet waste into the dust box 49. Then, the operation of the push arms 80 and 81 is started by the CPU, and when an abnormal pulse is detected in the movement time with respect to the movement amount in the push-in operation (S202), if the accumulated amount of sheet waste in the dust box 49 is nearly full, the CPU (S203). Then, the CPU immediately stops the system (S204), sends an alarm to the image forming apparatus main body 1, notifies the user of the full state of the dust box 49 (S205), and stops the image formation or prepares for the next operation. . If the movement amount and movement time of the push arm are normal operations and no abnormal pulse is detected, the end of the sequence is confirmed to prepare for the next operation (S206).
[0032]
[Other Embodiments]
In the above embodiment, in order to detect the full load in the dust box 49 of the sheet waste, the encoder (encoder 88) and its pulse amount are detected on the output shaft of the motor (pusher motor 85) of the drive means of the pusher mechanism. The sensor (pusher motor clock sensor S10) is provided, and the configuration is described so that the CPU detects the signal and detects the full load. By the way, if sheet waste accumulates in the dust box 49, the movement of the push arms 80 and 81 is hindered, so that the load applied to the pusher motor 85 increases and the current consumption increases. Therefore, it is possible to replace the full load detection means by providing a current detection means for detecting a change in the current value sent to the pusher motor 85 and determining that the load is full when a current exceeding a predetermined current value flows. This also eliminates the need for a full load detection means using a conventional transmission sensor or the like.
[0033]
Further, in FIG. 2B, the cutting blade 47 has a bowl-like shape with a sharp lower end, but may be a circular cutting blade 47a as shown in FIG. 2C. Thus, since the cutting blade 47a can be rotated, the point of the blade to be cut is changed unlike the above-described saddle-shaped cutting blade 47, so that the durability can be greatly improved. Further, as shown in FIG. 2 (d), even when the cutting blade 47b has a shape with no sharp lower end, the point of the cutting blade becomes a line from the point, so that the durability can be greatly improved.
[0034]
In the above embodiment, the cutting blade 47 is reciprocally moved parallel to an arbitrary side of the sheet bundle to perform the cutting process. However, as shown in FIG. 7, a cutting blade 92 wider than the sheet is used. Even if the cutting blade 92 is moved substantially perpendicularly to the surface of the sheet bundle to perform the cutting process, the present invention can be similarly applied to obtain the effect.
[0035]
In the above embodiment, a copying machine is exemplified as the image forming apparatus. However, the present invention is not limited to this. For example, the image forming apparatus may be another image forming apparatus such as a printer, a facsimile, or the like. A similar effect can be obtained by applying the present invention to a sheet processing apparatus.
[0036]
In the above-described embodiment, the sheet processing apparatus that is detachable from the image forming apparatus is exemplified. However, the present invention may be a sheet processing apparatus that is integrally provided with the image forming apparatus, and the present invention is applied to the sheet processing apparatus. By doing so, the same effect can be obtained.
[0037]
In the above embodiment, the electrophotographic method is exemplified as the recording method. However, the recording method is not limited to this, and other recording methods such as an ink jet method may be used.
[0038]
In the above embodiment, the stapler is exemplified as the binding means for creating the sheet bundle inside the finisher of the sheet processing apparatus. However, the present invention is not limited to this, for example, a glue binding mechanism or a saddle mechanism. Such binding means may be used.
[0039]
【The invention's effect】
As described above, in the sheet processing apparatus and the image forming apparatus according to the present invention, by providing a pusher mechanism that directly pushes the sheet waste in the dust box, the dust box can be It is possible to prevent the detection of full load while leaving a large stacking capacity, and to reliably store sheet waste up to an allowable stacking capacity. That is, since the sheet waste is pushed directly inside the dust box, erroneous detection can be reliably prevented.
[0040]
Further, by performing full load detection using the control circuit of the pusher mechanism, the conventional full load detection means using a transmission sensor or the like can be eliminated, and an increase in production cost due to the addition of members can be suppressed.
[Brief description of the drawings]
FIG. 1 is a main cross-sectional view of an image forming apparatus and a sheet processing apparatus according to an embodiment.
FIG. 2 is a cross-sectional view of a cutting mechanism.
FIG. 3 is a view for explaining the vicinity of a cutting blade.
FIG. 4 is a sectional view of a dust box.
FIG. 5 is a control block diagram of the sheet processing apparatus.
FIG. 6 is a flowchart illustrating a full load detection sequence.
FIG. 7 is a diagram illustrating another embodiment.
[Explanation of symbols]
S1 Sheet detection sensor
S2: Paper surface detection sensor
S3 ... Staple sensor
S4: Reversing sensor
S5 ... Cutting sensor
S6: Movement unit sensor
S6a ... Photo sensor
S6b ... Photo sensor
S6c ... Photo sensor
S7: Holding member sensor
S8 ... discharge sensor
S9: Home position sensor
S10: Pusher motor clock sensor
8… discharge path
9… discharge tray
10 ... Reversing roller pair
19 ... Finisher
20 ... Conveying guide pair
21 ... discharge roller
22… discharge roller pair
23: Processing tray
24 ... alignment plate
25 ... Stopper
31 ... Conveyor belt
33 ... Conveying upper roller
34 ... Stapler
40 ... Elevating tray
42 ... Reverse flapper
43 ... Reverse roller
44 ... Cutting mechanism
45 ... introduction discharge roller
46 ... Holding member
47, 47a, 47b ... Cutting blade
48… Movement unit
49 ... Dust box
50 ... discharge roller
51 ... Stack tray
62. Sheet holding base
63… guide shaft
64 ... side plate
65 ... side plate
66 ... belt
67… Belt gear
68 ... Second belt gear
69… Movement unit motor
70 ... pulley
71 ... light shielding plate
72 ... slide plate
73 ... Screw shaft
74 ... Gear
75 ... belt
76 ... Holding member shift motor
77 ... pulley
78 ... Shading plate
79… Seat seat
80, 81 ... push arm
82, 83 ... axis
84 ... Gear
85 ... pusher motor
86 ... pulley
87… Shading plate
88 ... Encoder
91 ... Switching flapper
92 ... Cutting blade
100 ... Control block

Claims (14)

Conveying means for conveying the sheet;
A cutting mechanism for cutting the edge of the sheet;
A dust box for storing sheet waste generated when cutting,
A sheet processing apparatus comprising a pusher mechanism that pushes in sheet dust stacked in the dust box. The pusher mechanism is
The sheet processing apparatus according to claim 1, further comprising a pushing unit that pushes the sheet waste. A movement detecting means for detecting the pushing amount;
The sheet processing apparatus according to claim 2, further comprising: a determination unit configured to determine that the sheet waste in the dust box is full according to a pushing amount. Conveying means for conveying the sheet;
A holding table for holding the conveyed sheet;
A pressing member for pressing the sheet held on the holding table;
A cutting blade for cutting the edge of the sheet pressed by the pressing member;
A dust box for storing sheet waste generated when cutting,
A sheet processing apparatus comprising a pusher mechanism that pushes in sheet dust stacked in the dust box. The pusher mechanism is
Pushing means for pushing in the sheet waste,
Driving means for moving the pushing means;
Movement detection means for detecting a movement time for a predetermined movement amount of the pushing means,
The sheet processing apparatus according to claim 4, wherein it is determined that the sheet waste in the dust box is full according to a movement time with respect to a predetermined movement amount. The pusher mechanism is
Pushing means for pushing in the sheet waste,
Driving means for moving the pushing means;
Current detecting means for detecting the value of the current supplied to the driving means,
6. The sheet processing apparatus according to claim 5, wherein it is determined that the sheet waste in the dust box is full according to a current value detected by the current detection unit with respect to a predetermined current value. In an image forming apparatus comprising: an image forming unit; and a sheet processing apparatus that performs post-processing of a sheet image-formed by the image forming unit.
An image forming apparatus, wherein the sheet processing apparatus is the sheet processing apparatus according to claim 1. In an image forming apparatus comprising: an image forming unit; and a sheet processing apparatus that performs post-processing of a sheet image-formed by the image forming unit.
A cutting mechanism for cutting the edge of the sheet;
A dust box for storing sheet waste generated when cutting,
An image forming apparatus comprising a pusher mechanism for pushing in sheet waste stacked in the dust box. The pusher mechanism is
The image forming apparatus according to claim 8, further comprising a pushing unit that pushes the sheet waste. A movement detecting means for detecting the pushing amount;
The image forming apparatus according to claim 9, further comprising a determination unit configured to determine that the sheet waste in the dust box is full according to a push-in amount. Conveying means for conveying the sheet;
A cutting mechanism for cutting the sheet;
A dust box for storing sheet waste generated when cutting,
A sheet processing apparatus comprising a pusher mechanism that pushes in sheet dust stacked in the dust box. The pusher mechanism is
The sheet processing apparatus according to claim 11, further comprising: a pushing unit that pushes the sheet waste. A movement detecting means for detecting the pushing amount;
The sheet processing apparatus according to claim 12, further comprising a determination unit that determines that the sheet waste in the dust box is full according to the amount of pressing. The sheet processing apparatus according to claim 13, wherein the cutting mechanism includes means for cutting the bundle of sheets.

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