JP2012229098A - Sheet processing device, and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To substantially increase an amount of rubbish which can be accommodated in a punch-rubbish box without making an apparatus intricate to extend a cycle of dumping the rubbish for a user.SOLUTION: A sheet processing device includes: a punch unit 1320 that moves a punch blade 209 in a direction crossing a conveyance direction of a sheet and carries out perforation processing on the sheet; the punch-rubbish box 203 that accommodates rubbish which is flown to a direction where the punch blade 209 moves when a hole is punched on the sheet by the punch blade 209; a rubbish detection sensor 302 that detects the rubbish in the punch-rubbish box 203; a punch motor 212 for actuating the punch blade 209; and a finisher control part 856 that controls a drive of the punch motor 212. The finisher control part 856 changes a moving speed of the punch blade 209 to a moving speed for accommodating the rubbish on a different position in the punch-rubbish box 203 in accordance with perforation times of the sheet by the punch blade 209.

Description

  The present invention relates to a sheet processing apparatus that performs punching processing on a sheet, and an image forming apparatus including the sheet processing apparatus.

  Conventionally, an image forming apparatus is provided with a sheet processing apparatus in order to perform various processes on an image-formed sheet. As one of the sheet processing apparatuses, there is a sheet processing apparatus 2400 that performs punching processing on a sheet as shown in FIG.

  A sheet processing apparatus 2400 shown in FIG. 17 includes a punch unit 2320 that performs a punching process, a lateral registration detection unit 2330 that detects an end of the sheet in the thrust direction, and a shift unit 2340 that moves the sheet in a direction orthogonal to the sheet conveyance direction. It is configured.

  The punch unit 2320 is disposed sideways in the apparatus, and performs punching in a state where the sheet is vertical. Then, the punch motor 2212 is started at a constant speed, and the punch blade 2209 is operated to perform perforation.

  Further, the sheet processing apparatus 2400 is provided with a punch waste box 2203 for storing the waste T1 that has been punched by the sheet processing apparatus 2400, and the detection means 2205 detects the waste T1 in the punch waste box 2203 at the detection position V1. It can be detected. When the waste T1 in the punch waste box 2203 reaches the detection position V1, the sensor of the detection unit 2205 is turned on, and it is determined that the waste T1 is full, and the operation unit of the image forming apparatus displays that the waste T1 is discarded. Is done. As a result, the user can take out the punch waste box 2203 and discard the waste T1.

  And in order to reduce the frequency | count that a user throws away waste T1, the structure which provides the member for planarizing a pile of waste like patent document 1 so that more waste T1 can be accommodated in the punch waste box 2203. Are known. According to the configuration of Patent Document 1, the waste capacity can be increased by storing the waste uniformly in the punch waste box.

Japanese Patent Laid-Open No. 2003-71795

  However, when a member for flattening scraps as shown in Patent Document 1 is provided, a driving means such as a motor for operating the flattening member or the flattening member is necessary, and the number of parts increases. However, it had to be complicated.

  Further, since the driving means is controlled at a constant perforation speed, the waste T1 always falls to the same position in the punch waste box 2203 as shown by the solid line in FIG. In this case, as shown in FIG. 17, the scrap T1 reaches the detection position V1 in spite of the spaces 2203a and 2203b for storing the scrap T1 in the punch scrap box 2203, which is early detection. End up. For this reason, the cycle in which the user discards the waste T1 is shortened, and the efficiency is not good.

  Therefore, an object of the present invention is to increase the amount of waste that can be accommodated in the punch waste box without complicating the apparatus, and lengthen the cycle in which the user throws away waste.

  In order to achieve the above object, the present invention comprises a perforating means having a movable perforating member for perforating a sheet, and performing perforation processing on the sheet by moving the perforating member in a direction crossing the sheet conveying direction. A housing portion that stores waste that is blown in a moving direction of the punching member when a hole is made in the sheet by the punching member of the punching device, a waste detection unit that detects waste in the housing portion, and the punching device Driving means for operating the perforating member, and control means for controlling the driving of the driving means, wherein the control means controls the moving speed of the perforating member according to the number of operations of the perforating member. The movement speed is changed to accommodate the waste at different positions in the accommodation portion.

  According to the present invention, by changing the moving speed of the perforating member, the waste can be accommodated in different positions in the accommodation portion, and the waste can be uniformly accommodated in the accommodation portion. That is, the amount of waste that can be accommodated in the accommodating portion can be substantially increased without complicating the apparatus. Thereby, the cycle in which the user throws away the waste can be lengthened, and the number of times the job stops can be reduced.

Schematic sectional view of an image forming apparatus equipped with a sheet processing apparatus Schematic cross section of sheet processing equipment Illustration of the horizontal register detection unit Explanation of shift unit Cross-sectional view of drilling equipment Explanatory drawing of punch unit CC sectional view of FIG. A view of arrow A in FIG. (A)-(d) is sectional drawing which shows the flow of the sheet | seat of a punching processing apparatus. Sectional drawing which shows the position where waste accumulates from the closed space side of 1st Embodiment to the open space side (A)-(b) is a perspective view of a punch waste box. Block diagram showing control configuration of image forming apparatus (A)-(b) The flowchart figure which shows the punching operation | movement in the sheet processing apparatus which concerns on 1st Embodiment. Sectional drawing which shows the position where waste accumulates from the open space side of the first embodiment to the closed space side (A)-(b) The flowchart figure which shows the punching operation | movement in the sheet processing apparatus which concerns on 2nd Embodiment. Sectional drawing which shows how to collect the waste of the punch waste box in the third embodiment Sectional view of a conventional sheet processing apparatus

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. Therefore, unless specifically stated otherwise, the scope of the present invention is not intended to be limited thereto.

[First Embodiment]
Hereinafter, a sheet processing apparatus according to the first embodiment and an image forming apparatus including the sheet processing apparatus will be described with reference to FIGS. 1 to 14. In addition, the numerical value taken up in description is a reference numerical value, Comprising: This invention is not limited. Moreover, what attached | subjected the same code | symbol is the same structure, The duplication description about these shall be abbreviate | omitted suitably.

(Image forming device)
As an image forming apparatus, a monochrome / color copying machine (hereinafter simply referred to as “copying machine”) 1100 is illustrated and described with reference to FIG. The copying machine 1100 includes a copying machine main body 1000 and a finisher 1500 as a sheet processing apparatus.

  The finisher 1500 is detachably connected to the main body 1000 of the copying machine, and includes a side stitching processing device 1300 and a sheet punching processing device 1400 shown in FIG. For this reason, sheets discharged from the copying machine main body 1000 can be processed online.

  Note that the finisher 1500 may be used as an option. Therefore, the copying machine main body 1000 can be used alone. Further, the finisher 1500 and the main body 1000 may be integrated.

  Sheets are selectively supplied from the cassettes 1010a to 1010d in the main body 1000. Four-color toner images are transferred to the supplied sheets by yellow, magenta, cyan, and black photoconductive drums 1020a to 1020d that respectively constitute image forming units (image forming units). The sheet on which the toner image has been transferred is conveyed to a fixing device 1030 where the toner image is fixed and discharged outside the apparatus.

(Finisher)
In FIG. 1, the sheet discharged from the copying machine main body 1000 is sent to the finisher 1500. In FIG. 2, a finisher 1500 sequentially takes sheets discharged from the main body 1000 of the copier and selectively performs various sheet processes.

  As various sheet processes, a process of aligning a plurality of captured sheets and bundling them into one bundle (alignment process), and a stapling process of binding the rear end (upstream end in the sheet conveying direction) of the bundled sheet bundle with a stapler 1310 There is. Further, there is a punching process in which holes are punched by a punch unit (piercing means) 1320 near the rear end of the fetched sheet. Further, there are various sheet processes such as a sort process, a non-sort process, a folding process for folding a sheet bundle, and a bookbinding process. The finisher 1500 selectively performs these sheet processes.

  The finisher 1500 has an inlet roller pair 1510 for guiding the sheet discharged from the main body 1000 of the copying machine 1100 to the inside as shown in FIG. A sheet punching processing device 1400 that operates during the sheet punching process is provided on the downstream side of the inlet roller pair 1510.

  The sheet punching processing apparatus 1400 includes a punch unit 1320 that performs punching processing on a sheet, a lateral registration detection unit 1330 that detects a lateral registration of the sheet, and a shift unit 1340 that moves the sheet in a direction orthogonal to the conveyance direction.

  The sheet guided to the flat binding path is sent toward the buffer roller 1540 through the conveyance roller pair 1530. The conveyance roller pair 1530 and the buffer roller 1540 can be rotated forward and backward.

  Since the buffer roller 1540 can be rotated forward and backward, a predetermined number of sheets can be stacked by switchback control. The sheet sent to the buffer roller 1540 is stacked on the stacking tray 1701 or transported to the transport roller pair 1570 by the switching member 1560 disposed downstream.

  The sheet conveyed to the conveying roller pair 1570 is further stacked on the stacking tray 1702 by the discharge roller pair 1303 or is stacked on the processing tray 1305 for performing a binding process.

  The sheets stacked in a bundle on the processing tray 1305 are subjected to alignment processing, stapling processing, and the like, and then discharged onto the stacking tray 1702 by the discharge roller pair 1303. Note that a stapler 1310 is used for stapling processing for binding sheets stacked in a bundle on the processing tray 1305. The stapler 1310 is configured to bind portions corresponding to corners and back portions of the sheet bundle.

(Sheet punching device)
Next, the punch unit 1320, the lateral registration detection unit 1330, and the shift unit 1340 constituting the sheet punching processing apparatus 1400 will be described with reference to FIGS.

(Horizontal cash register detection unit)
First, the lateral registration detection unit 1330 of the sheet punching device 1400 will be described. FIG. 3 is a view of the lateral registration detection unit viewed from the downstream side in the sheet conveyance direction.

  As shown in FIG. 3, when the sheet passes through a conveyance path 309 including conveyance guides 307 and 308, the sensor 302 detects the thrust edge of the sheet, and determines the position of the edge in the width direction of the sheet. It is configured to be identifiable. Here, the thrust end portion of the sheet is an end portion in the width direction orthogonal to the sheet conveyance direction.

  The sensor 302 is provided with bearings 303 and 304. These bearings 303 and 304 are configured to be movable in the direction of the arrow X along guides 305 and 306 fixed to the sheet punching processing apparatus 1400, respectively.

  The sensor 302 has been moved to a position corresponding to the sheet size in advance based on sheet size information input from the operation unit 1040 (see FIG. 1) of the copying machine main body 1000. The sensor 302 has a recess, and detects an end of the sheet that has entered the recess in the width direction.

  A drive source for moving the sensor 302 is a motor 314. The timing belt 311 is operated by a pulley 313 provided in the motor 314 and a pulley 312 fixed to the finisher 1500. The sensor 302 and the timing belt 311 are connected by a fixed plate 310 so that the sensor 302 can be moved in accordance with the operation of the timing belt 311.

(Shift unit)
Next, the shift unit 1340 of the sheet punching device 1400 will be described. FIG. 4 shows the shift unit 1340 as viewed from the downstream side in the sheet conveyance direction.

  In the shift unit 1340, a transport path 423 is configured by the transport guides 403a and 403b. Further, the conveyance roller pair 402a and 402b and the conveyance roller pair 404a and 404b (see FIG. 2) are configured to be able to sandwich and convey the sheet. The conveyance roller pairs 402 and 404 are connected to the shift conveyance motor 417 via gears 415 and 416 and configured to be able to rotate forward and backward according to the rotation of the shift conveyance motor 417.

  The conveyance roller pairs 402 and 404 and the conveyance guides 403a and 403b are supported by frames 405, 406, 407, and 408. Further, the bearings 409, 410, 411, 412 fixed to the frames 405, 406, 407, 408 are configured to be movable along the guides 413, 414. The frames 405, 406, 407, and 408 are connected to the timing belt 418 by a fixing plate 419. The fixed plate 419 is configured to be movable via a timing belt 418 by a shift motor 422 and pulleys 420 and 421.

(Punch unit)
Next, the punch unit 1320 of the sheet punching processing apparatus 1400 will be described. FIG. 5 shows an enlarged view of the sheet punching processing apparatus 1400 of FIG. FIG. 6 shows the punch unit 1320 as viewed from the upstream side in the sheet conveying direction. 7 is a cross-sectional view taken along the line CC in FIG. 6, and FIG. 8 is a view taken in the direction of arrow A in FIG.

  As shown in FIG. 6, the punch unit 1320 has a punch blade 209 as a first punch member that can move in a direction crossing the sheet conveying direction, and a die 206 as a replaceable second punch member. It is arranged with an inclination through the sheet conveyance path.

  As shown in FIG. 6, in the punch unit 1320, a punch guide 204 as guide means for guiding the punch blade 209 and a conveyance guide 205 as a sheet conveyance guide for guiding a sheet are fixed by caulking. Further, the conveyance guide 205 and the die 206 as the second perforating member are fixed by caulking. Further, a conveyance path 207 as a sheet conveyance path (conveyance path) is formed between the conveyance guide 205 and the die 206.

  Further, as shown in FIG. 7, the punch blade 209 as the first perforating member is supported by the sliding support portions 204a and 204b of the punch guide 204, and slides up and down (direction intersecting with the sheet conveying direction). It is configured to be possible. Parallel pins 223 (parallel pins 223a, 223b, 223c, 223d in FIG. 6) are driven into the punch blades 209 (in FIG. 6, punch blades 209a, 209b, 209c, 209d), respectively.

  As shown in FIG. 6, one end of the parallel pins 223a, 223b, 223c, and 223d enters the cam grooves 208a, 208b, 208c, and 208d formed in the slide rack 208. The slide rack 208 is operated in the direction of arrow D in FIG. 6 via gears 213 and 214 and a rack portion 208f of the slide rack 208 by a punch motor (driving means) 212. At this time, the parallel pins 223a to 223d and the punch blades 209a to 209d operate in the arrow E direction in accordance with the shapes of the cam grooves 208a to 208d.

  When the slide rack 208 moves in the direction of arrow D, the slide rack detection sensor (operation number detection means) 230 detects ON / OFF of the flag portion 208e of the slide rack 208. The operation of the slide rack 208 is counted based on the flag detection signal of the slide rack detection sensor 230, and the rotational speed of the motor 212 is controlled based on the count.

  The punch blades 209 (in FIG. 6, punch blades 209a to 209d) enter the die holes 218 of the die 206 (die holes 218a, 218b, 218c, and 218d in FIG. 8), respectively, and holes are formed in the sheet P. Can be opened. It should be noted that punch scrap generated by the perforation falls from the die hole 218 and is stored in the punch scrap box 203 shown in FIG.

  Further, the rear end stopper 221 shown in FIGS. 5 and 7 (rear end stoppers 221a and 221b in FIG. 8) abuts the rear end of the sheet P conveyed in the direction opposite to the conveyance direction. The rear end stopper 221 is for making the distance from the rear end of the sheet P to the punch punching portion constant.

  The sheet P entering from the direction of the arrow F shown in FIG. 7 pushes the trailing end stopper 221 in the direction of the arrow G at the leading end. At this time, the rotation fulcrum 224 becomes the rotation center of the rear end stopper 221. When the rear end of the sheet P passes through the rear end stopper 221, the sheet P returns to the original position by a spring 240 (see FIG. 5) connected to the rear end stopper 221.

  Thereafter, the sheet P is switched back by a pair of conveying rollers 402 and 404 shown in FIG. The rear end of the sheet to be switched back is abutted against the abutting portion 225 of the rear end stopper 221, and the punching position from the rear end of the sheet P is determined.

(Punching operation)
Next, a series of operations of the punch unit 1320, the lateral registration detection unit 1330, and the shift unit 1340 during the punching process and details of sheet conveyance will be described with reference to FIG.

  First, as shown in FIG. 9A, the sensor 101 detects the entrance of the sheet P discharged from the copying machine main body 1000 into the finisher 1500. Thereafter, the sheet P is nipped and conveyed by the inlet roller pair 1510 and reaches the punch unit 1320.

  Subsequently, the sheet P pushes the rear end stopper 221 and sequentially reaches the lateral registration detection unit 1330 and the shift unit 1340. At this time, the lateral registration detection unit 1330 scans in the front back direction (width direction orthogonal to the sheet conveyance direction) in the figure, and confirms the position of the front side of the sheet P (hereinafter referred to as a thrust position). .

  When the thrust position of the sheet P (the position of the end portion in the width direction of the sheet) is confirmed, the shift motor 1422 (see FIG. 4) of the shift unit 1340 is controlled so that the shift unit 1340 has a certain amount from the punching position of the punch unit 1320. It is moved to the shifted predetermined thrust position.

  Next, as shown in FIG. 9B, when the trailing edge of the sheet P passes through the trailing edge stopper 221, the trailing edge stopper 221 returns to the original position by the spring 240 (FIG. 5). Thereafter, when a predetermined amount of sheets are conveyed, the shift conveyance motor 417 (see FIG. 4) of the shift unit 1340 is controlled to temporarily stop the conveyance roller pairs 402 and 404.

  Thereafter, the shift conveyance motor 417 (see FIG. 4) reverses, and the sheet P is started to be switched back by the conveyance roller pair 402, 404. Note that the stop and reverse timings of the conveyance roller pairs 402 and 404 differ depending on the length of the sheet in the conveyance direction, and are counted by the sheet detection signal of the sensor 101.

  Next, as shown in FIG. 9C, the rear end of the sheet P hits the rear end stopper 221 by the pair of conveying rollers 402 and 404 that started reverse rotation, and the sheet P forms a predetermined loop R and is inclined. Be taken over. When the sheet P hits the rear end stopper 221, the shift motor 422 (see FIG. 4) is activated, and the sheet is moved to a position that matches the punching position of the punch unit 1320.

  Thereafter, the punch motor 212 (see FIG. 6) is activated, and the punch blade 209 is moved (driven) in a direction intersecting the sheet conveyance direction, so that the sheet P is punched. The punching process is performed on the sheet P, and the punch scraps T that are part of the sheet P punched at that time are stored in the punch scrap box 203 (in the accommodating portion). The punch waste box 203 is a storage unit that stores waste that is blown in the moving direction of the punch blade 209 when a hole is made in the sheet by the punch blade 209. This punch waste box 203 is detachable from the sheet punching processing apparatus 1400. The presence / absence of the punch waste box 203 is detected by a punch waste box detection sensor 201 (see FIGS. 11 and 12) which is presence / absence detection means.

  After the above-described punching process is finished, as shown in FIG. 9D, the conveying roller pair 402, 404 rotates forward (rotates in the sheet conveying direction) and the sheet P is conveyed.

  The moving speed of the punch blade 209 when performing the above-described punching processing is changed by the punching operation control unit 906 described later according to the number of operations of the punch blade 209 (the number of times of punching). It can be changed to a moving speed to accommodate the position.

  Specifically, the punching operation control unit 906 causes the punch blade 209 to exceed the predetermined number of times so that the punch scraps T are sequentially stored in the punch scrap box 203 from the rear side to the front side in the moving direction of the punch blade 209. Each time, the moving speed of the punch blade 209 is decreased.

  In the present embodiment, the punch motor 212 is started at a rotational speed of 500 mm / s until the number of punches by the punch blade 209 reaches a predetermined number X. Thereby, the punch blade 209 moves at the first moving speed. Then, when the number of times of punching by the punch blade 209 exceeds the predetermined number X, the rotational speed of the punch motor 212 is slowed down to start at 480 mm / s. As a result, the punch blade 209 moves at a second movement speed that is slower than the first movement speed described above. When the punching process by the punch blade 209 is performed up to a predetermined number Y at a rotational speed of 480 mm / s, the punch motor 212 is started at a slower rotational speed of 460 mm / s. As a result, the punch blade 209 moves at a third movement speed that is slower than the second movement speed. Thus, every time the number of operations of the punch blade 209 exceeds a predetermined number, the moving speed of the punch blade 209 is decreased.

  As described above, when the rotation speed of the punch motor 212 is high, the movement speed of the punch blade 209 in FIG. 6 is increased. When the rotation speed of the punch motor 212 is decreased, the movement speed of the punch blade 209 is decreased. It has become. Here, the rotational speed of the punch motor 212 is controlled so that the moving speed of the punch blade 209 is decreased according to the number of times the punch blade 209 is punched.

  At this time, when punching is performed at a rotational speed of 500 mm / s, the punch blade 209 in FIG. It falls to the area | region t1 of FIG. When the rotational speed is 480 mm / s, the punch scraps T fall in the region t2 that is on the near side of the region t1, and when the rotational speed is 460 mm / s, the moving speed of the punch blade 209 in FIG. The punch scraps T fall in a region t3 that is further on the near side than the region t2.

  In this way, by controlling the moving speed (punching speed) of the punch blade 209 in accordance with the number of operations (punching frequency) of the punch blade 209, the punch scrap box 203 is gradually moved from the back side 203a toward the front side. It is possible to accumulate punch scraps T. Thereby, the punch scraps T can be uniformly stored in the punch scrap box 203, the space in the punch scrap box 203 can be used sufficiently, and the scrap detection sensor 250 can be prevented from being detected early, and the scrap T can be stored. The capacity can be increased substantially.

  The scrap detection sensor (debris detection means) 250 is an optical sensor that constantly detects whether the punch scrap T is in the detection region V in the punch scrap box 203 and sees the rebound of the scrap T reflected. Thus, the presence / absence of the waste T is determined. Further, in order to detect the falling waste T and prevent false detection, if the state of being ON for a predetermined time (the state with waste) continues, it is determined that the waste T is full and the waste T is discarded. As shown, it is displayed on the operation unit 1040 of FIG. In addition, the number of punches at each moving speed is set so that the relationship between the height positions of the punch waste T accumulated in each region t is t1 <t2 <t3, and detection is performed after the waste T accumulates in the region t1. The position V is reached.

  When the waste T is accumulated by the above operation and the waste detection sensor 250 is turned on, the operation unit 1040 displays that the waste T is full, and the user takes out the punch waste box 203 to remove the waste T. It is supposed to be thrown away.

  At this time, the presence or absence of the punch waste box 203 is detected by detecting the flag portion 203c provided in the punch waste box 203 with the punch waste box detection sensor 201 attached in the finisher 1500 main body.

  As shown in FIG. 11A, when throwing away the accumulated waste T, the user takes out the punch waste box 203 and the punch waste box detection sensor 201 is turned off. Then, the number of operations of the slide rack 208 counted by the flag detection signal of the slide rack detection sensor 230 in FIG. 6 is reset. And as shown in FIG.11 (b), when the user pushes and sets the punch waste box 203 in the arrow Z direction and the punch waste box detection sensor 201 is turned ON, the waste T on the operation unit 1040 is full. Disappears and the drilling operation can be performed again.

  Here, the control configuration of the image forming apparatus will be described with reference to FIG. FIG. 12 is a block diagram illustrating a control configuration of the image forming apparatus.

  As illustrated in FIG. 12, the CPU circuit unit 850 serving as a control unit (control unit) included in the main body 1000 includes a CPU 849, a ROM 851, and a RAM 870. In accordance with the program stored in the ROM 851 and the setting of the operation unit 1040, the CPU circuit unit 850 has a document feeder control unit 852, an image reader control unit 853, an image signal control unit 854, a printer control unit 855, a finisher control unit 856, an external It manages the interface 857.

  The document feeder controller 852 controls the document feeder, the image reader controller 853 controls the image reader, the printer controller 855 controls the printer, and the finisher controller 856 controls the finisher 1500.

  The RAM 870 is used as an area for temporarily storing control data and a work area for operations associated with control. An external interface 857 is an interface from a personal computer (PC) 820 and develops print data into an image and outputs the image to the image signal control unit 854. The image read by the image sensor is output from the image reader controller 853 to the image signal controller 854, and the image output from the image signal controller 854 to the printer controller 855 is input to the exposure controller.

  Next, the finisher control unit 856 as a control unit (control means) included in the finisher 1500 will be described. The finisher control unit 856 includes a CPU 900, a RAM 901, a ROM 902, an I / O 903, a network interface 904, a communication interface 905, and the like.

  The I / O 903 controls the punching operation control unit 906. The punching operation control unit 906 is a lateral registration detection unit control unit 908, a shift unit control unit 909, a punch unit control unit 910, a punching number storage unit 911, and a dust detection sensor control unit 912. The punch waste box sensor control unit 913 is included. Each unit control unit 908, 909, 910, 911, 912, 913 controls the operation of the sensor and the motor, respectively.

  In this example, the finisher 1500 as the sheet processing apparatus and the copying machine main body 1000 each have a control unit and are controlled by the control unit. However, the present invention is not limited to this. . The present invention is effective even in a configuration in which the operation control of the finisher as the sheet processing apparatus is performed by any one of the control units.

  Subsequently, an operation flow when the rotation speed is switched when the user selects a mode for performing the punching process will be described with reference to FIG. 13. FIG. 13 is a flowchart showing a flow of a drilling operation in the finisher.

  First, as shown in FIG. 13A, when a mode for performing a punching process is selected by the user, a punching process job is started (S11). In the punching processing operation, as shown in FIG. 13B, the punch motor is rotated at a rotational speed of 500 mm / s until the number of operations of the punch blade 209 (the number of punches) exceeds a predetermined number X (S21). The punch unit controller described above counts the number of operations of the punch blade 209 (the number of punches) by the slide rack detection sensor 230 and stores the count in the punching number storage unit 911. When this count value exceeds the predetermined number of times X (S22), the rotational speed of the punch motor is switched to a rotational speed slower than the aforementioned rotational speed, and the rotational speed is 480 mm / s (S23).

  Thereafter, when the rotational speed is switched to 480 mm / s and the count value of the number of punches of the punch blade 209 exceeds the predetermined number Y (S24), the rotational speed of the punch motor is switched to a slower rotational speed at 460 mm / s. It starts to rotate (S25).

  Thereafter, the punching process is repeated, and as shown in FIG. 13A, when the scrap detection sensor 250 detects the scrap (S12), the punching process job is once stopped and the punch scrap box 203 is full on the operation unit 1040. Is displayed (S13).

  When the user removes the punch waste box 203 from the sheet processing apparatus in order to throw away the full waste, the punch waste box detection sensor 201 is turned off (S14). When the punch waste box detection sensor 201 is switched from ON to OFF, the counter value of the slide rack detection sensor 230 is reset (S15).

  Thereafter, when the punch waste box 203 after discarding the waste is attached to the inside of the sheet processing apparatus by the user, the punch waste box detection sensor 201 detects the punch waste box 203 (S16). When the punch waste box detection sensor 201 is turned on, the punching job is restarted (S17), and waste is again accumulated in the punch waste box 203.

  In the present embodiment, the rotational speed of the punch motor 212 is decreased as the number of punches of the punch blade 209 increases. However, the present invention is not limited to this. For example, the same effect can be obtained even if the rotational speed of the punch motor 212 is increased as the number of punches increases.

  In that case, the moving speed of the punch blade is changed so that the waste is sequentially accommodated in the punch waste box from the near side to the far side in the moving direction of the punch blade. Specifically, it starts at a rotational speed of 460 mm / s until a predetermined drilling number X, starts at a rotational speed of 480 mm / s when the punching number exceeds the predetermined number of times X, and starts at a predetermined punching number Y at a rotational speed of 480 mm / s. When the perforating process is performed, the apparatus is started at a rotational speed of 500 mm / s.

  At this time, when punching is performed at a rotational speed of 460 mm / s, the moving speed of the punch blade 209 in FIG. 6 is slow, so that the scrap T does not fly away but falls into the region t3 in FIG. 14 and the rotational speed is 480 mm / s. The waste T falls in the region t2. When the rotational speed is 500 mm / s, the moving speed of the punch blade 209 in FIG. 6 increases, so that the scrap T falls in the region t1 in FIG.

  Thus, by controlling the moving speed (punching speed) of the punch blade 209 according to the number of operations of the punch blade 209 (the number of punching), the scraping speed is controlled to a moving speed that accommodates the scraps in different positions in the punch waste box. The waste T can be gradually accumulated from the near side to the far side of the punch waste box 203. Thereby, the punch scraps T can be uniformly stored in the punch scrap box 203, the space in the punch scrap box 203 can be used sufficiently, and the scrap detection sensor 250 can be prevented from being detected early, and the scrap T can be stored. The capacity can be increased substantially. Further, the number of times of perforation at each moving speed is set so that the relationship between the height positions of the waste T accumulated in each region becomes t3 <t2 <t1, and the detection position V is obtained after the waste T accumulates in the region t1. To come to reach.

[Second Embodiment]
In the second embodiment, the moving speed (rotational speed of the punch motor) of the punch blade 209 that is the first punching member is changed according to the type of sheet.

  Specifically, in this embodiment, the moving speed of the punch blade 209 is increased as the basis weight of the sheet increases.

  In addition, in the following description, the structure which accumulate | stores the waste T gradually from the near side of the punch waste box 203 to the back side is illustrated.

  The flow of operation when the rotation speed is switched when the user selects the mode for performing the punching process will be described with reference to FIG. FIG. 15 is a flowchart showing a flow of a drilling operation in the finisher.

  As shown in FIG. 15A, the basis weight of the sheet input by the user with the operation unit 1040 is 120 gsm or less until the punching job is started and the punch blade 209 is operated up to the predetermined number X (the number of punches). In this case, it starts at a rotational speed of 500 mm / s (S31). On the other hand, as shown in FIG. 15B, when the basis weight of the sheet exceeds 120 gsm, the sheet is started at a rotational speed of 520 mm / s (S41).

  When the rotational speed of the motor 212 is slow, the moving speed of the punch blade 209 in FIG. 6 is slowed down, and when the rotational speed of the motor 212 is increased, the moving speed of the punch blade 209 is fastened. The motor 212 is controlled so as to increase the drilling speed when becomes larger.

  When the basis weight of the sheet is 120 gsm or less, when the predetermined number of times X is exceeded (S32), the punch motor starts up at a rotational speed 480 mm / s slower than the rotational speed described above (S33). Thereafter, when the number of punches of the punch blade 209 exceeds the predetermined number Y (S34), the punch motor is started at a slower rotation speed of 460 mm / s (S35). Thus, the rotational speed of the motor 212, that is, the moving speed of the punch blade 209 is controlled. Then, the punching process is performed until the scrap detection sensor 250 detects the scrap T in the punch scrap box 203 (S36).

  On the other hand, if the basis weight exceeds 120 gsm and exceeds the predetermined number of times X (S42), the punch motor is started at a rotation speed of 500 mm / s slower than the rotation speed described above (S43). Thereafter, when the number of punches of the punch blade 209 exceeds the predetermined number Y (S44), the punch motor is activated at a slower rotation speed of 480 mm / s (S45). Thus, the rotational speed of the motor 212, that is, the moving speed of the punch blade 209 is controlled. Then, the punching process is performed until the scrap detection sensor 250 detects the scrap T in the punch scrap box 203 (S46).

  As described above, in this embodiment, the moving speed (punching speed) of the punch blade 209 is changed to different positions in the punch waste box according to the number of operations of the punch blade 209 (number of punching) and the basis weight of the sheet. Control the moving speed to accommodate. As a result, even for sheets with different basis weights, the punch scraps T can be evenly accommodated in the punch scraps, and the space in the punch scrap box 203 is sufficiently used to prevent the scrap detection sensor 250 from detecting early. And the accommodation capacity | capacitance of the waste T can be increased substantially.

  In this embodiment, when the user selects a sheet whose surface is coated by the operation unit 1040, the sheet whose surface is coated is coated on a lighter sheet than a normal sheet and has a predetermined basis weight. I have to. For this reason, a sheet with a coating even at the same basis weight is lighter than a normal sheet (a sheet without coating), and therefore the perforation speed is made slower than that of a normal sheet.

  When the basis weight is 120 gsm or less with a sheet coated on the surface, it starts at a rotational speed of 480 mm / s up to a predetermined number of times X, and when the basis weight exceeds 120 gsm, it starts at a rotational speed of 500 mm / s. . When the basis weight of the sheet exceeds 120 gsm, the motor 212 is activated at a rotational speed of 460 mm / s, and when the basis weight of the sheet exceeds 120 gsm, the motor 212 is activated at a rotational speed of 480 mm / s. Is controlled.

  Thereafter, when a predetermined number of perforations Y is perforated, when the basis weight is 120 gsm or less, it starts at a rotational speed of 440 mm / s, and when the basis weight exceeds 120 gsm, it starts at a rotational speed of 460 mm / s.

  As described above, even if there is a coating, the punch scraps can be uniformly stored in the punch scrap box by controlling the moving speed of the punch blade so that the scraps are stored in different positions in the punch scrap box. .

  In this embodiment, when the amount of toner on the sheet is large when an image is formed, for example, when an image is formed on both sides of the sheet, the punching speed is higher than that when an image is formed on one side. I try to make it faster.

  At this time, the rotation speed is gradually decreased according to the number of times of punching stored in the punching number storage unit 911. As a result, the waste T can be dropped to an appropriate position in the punch waste box even on a sheet having a large amount of toner loaded and heavier than a normal sheet.

  Furthermore, in the present embodiment, when the user can select the punch blade and die of the punch unit as the punch blade and die having different punching areas, the punching speed is changed according to the type (punching area) of the selected punch unit. It has become.

  When a punch unit having a small punching area of the punch blade is used, the punching speed is reduced. When a punch unit having a large punching area is used, the punching speed is increased. At this time, the rotational speed of the punch motor 212 is determined according to the type of each punch unit, and the rotational speed is gradually decreased according to the number of punches stored in the punch number storage unit 911. . Thereby, even when the perforated areas are different, the waste can be dropped to an appropriate position of the punch waste box.

[Third Embodiment]
In the third embodiment, the moving speed of the punch blade, which is a punching member, is changed for each job.

  Specifically, the punch blade movement speed is changed to the rear side every time the number of operations of the punch blade exceeds a predetermined number so that the operation of sequentially storing the waste in the punch waste box from the back side to the front side is repeated. The control to slow down from the moving speed for housing to the moving speed for housing to the near side is repeated.

  The first punching job is rotated at a rotational speed of 500 mm / s, and the scrap is blown to the position of the arrow a in the punch waste box 203 in FIG. 16A, and in the next job, the rotational speed is 490 mm / s. Jump to position b. Further, in the next job, it rotates at a rotation speed of 480 mm / s, and scraps are blown to the position of arrow c, and in the next job, it rotates at a rotation speed of 470 mm / s and fly to the position of arrow d.

  Then, in the next job, it rotates again at a rotational speed of 500 mm / s, and the waste is blown to the position indicated by the arrow e in FIG. 16B, and in the next job, it rotates at a rotational speed of 490 mm / s and moves to the position indicated by the arrow f. And skip. Subsequently, it is rotated at a rotational speed of 480 mm / s and moved to the position of arrow g, subsequently rotated at a rotational speed of 470 mm / s, rotated to the position of arrow h, then rotated at a rotational speed of 460 mm / s, and then moved to the position of arrow i. To fly.

  In this way, the scrap accumulates as shown in FIG. 16C while changing the moving speed of the punch blade as the punching member for each job and changing the position where the scrap accumulates in the punch scrap box. Thereby, as shown in FIG. 16D, it is possible to substantially increase the waste capacity until the waste reaches the detection position V detected by the waste detection sensor 250.

  Further, in the present embodiment, when the number of punches exceeds a predetermined number N, the moving speed of the punch blade 209 is changed even in the same job so that the amount of debris accumulated in each region becomes constant.

  In the present embodiment, the moving speed of the punch blade is changed for each job and the number of punches stored in the punch number storage unit 911. However, the present invention is not limited to this. For example, the same effect can be obtained even if the moving speed of the punch blade, which is a punching member, is changed for each punching process. By changing the moving speed of the punch blade for each punching process, the waste always flies to different positions in the punch waste box, and the capacity in the punch waste box until the waste detection sensor 250 detects the waste is reduced. Can be increased substantially.

[Other Embodiments]
In the above-described embodiment, other configurations are possible as long as the moving speed of the punch blade is changed to the moving speed for storing the waste at different positions in the punch waste box according to the number of operations of the punch blade. Also good.

  In the embodiment described above, the number of operations of the punch blades reaches a predetermined number so that the scraps that are blown into the punch waste box by the punch blades are accommodated in the punch waste box in order from the back side to the front side in the movement direction of the punch blade. The structure which slows down the moving speed of a punch blade whenever it exceeds is illustrated. However, the present invention is not limited to this.

  For example, every time the number of punch operations exceeds a predetermined number so that the scraps blown into the punch scrap box by the punch blade are sequentially accommodated in the punch scrap box from the front side to the back side in the punch blade movement direction, It may be configured to increase the moving speed of the blade. The same effect can be obtained by this configuration.

  Moreover, in 3rd Embodiment mentioned above, the movement speed of a punch blade is changed from the movement speed for accommodating waste to the back side so that the operation | movement which accommodates waste in order in the punch waste box from back to front may be repeated. The structure which repeats the control which makes it slow to the moving speed for accommodating to the near side was illustrated. However, the present invention is not limited to this.

  For example, in order to accommodate scraps in the punch scrap box in order from the moving speed for storing the punch blade to the near side in order to accommodate the scrap in order from the front side to the back side in the punch blade moving direction, You may make it the structure which repeats the operation | movement made faster to a moving speed. The same effect can be obtained by this configuration.

  In the above-described embodiment, the basis weight of the sheet is exemplified as the type of sheet. When the basis weight of the sheet exceeds a predetermined value, the perforation member (punch blade 209) moves as compared with the case where the basis weight is less than the predetermined value. Although the speed is increased, the present invention is not limited to this. The basis weight of the sheet and the moving speed of the perforating member according to the basis weight are not limited to the above two types, and may be set as appropriate.

  Similarly, in the toner loading amount as the sheet type, the moving speed of the perforating member according to the sheet type is not limited to the above two types, and may be set as appropriate.

  Furthermore, when the perforated area of the selectable die is large, the moving speed of the punch blade (first perforated member) is increased as compared with the die having a small perforated area, but this is also limited to the above two types. What is necessary is just to set suitably.

  In the above-described embodiment, four image forming units are used to form a monochrome / color image. However, the number used is not limited and may be set as needed.

  The image forming unit may be a process cartridge that can be attached to and detached from the image forming apparatus main body. As a process cartridge, there is known a process cartridge having a photosensitive drum and a charging unit, a developing unit, and a cleaning unit as a process unit acting on the photosensitive drum. The process cartridge is not limited to this, and may be a process cartridge integrally including any one of a charging unit, a developing unit, and a cleaning unit in addition to the photosensitive drum.

  In the above-described embodiment, the copying machine is exemplified as the image forming apparatus, but the present invention is not limited to this. For example, the image forming apparatus may be another image forming apparatus such as a printer or a facsimile apparatus, or another image forming apparatus such as a multi-function machine that combines these functions. The same effect can be obtained by applying the present invention to a sheet processing apparatus used in these image forming apparatuses.

  In the above-described embodiment, the sheet processing apparatus detachably connected to the image forming apparatus main body is exemplified, but the present invention is not limited to this. For example, the image forming apparatus may be a sheet processing apparatus that is integrally provided, and the same effects can be obtained by applying the present invention to the sheet processing apparatus.

P: Sheet T ... Punch waste 203 ... Punch waste box 212 ... Punch motor 201 ... Punch waste box detection sensor 230 ... Slide rack detection sensor 250 ... Waste detection sensor 850 ... CPU circuit unit 856 ... Finisher control unit 1000 ... Main body 1040 ... Operation Unit 1100 ... Copier 1320 ... Punch unit 1330 ... Horizontal registration detection unit 1340 ... Shift unit 1400 ... Sheet punching processing device 1500 ... Finisher

Claims (13)

A perforating means having a perforating member for perforating the sheet, and performing perforation processing on the sheet by moving the perforating member toward the sheet;
An accommodating portion for accommodating waste that is blown in the moving direction of the perforating member when a hole is made in the sheet by the perforating member;
Waste detection means for detecting waste in the container;
Drive means for operating the piercing member;
Control means for controlling the drive of the drive means,
The sheet processing apparatus according to claim 1, wherein the control unit changes the moving speed of the punching member to a moving speed for storing the waste at different positions in the storage unit according to the number of operations of the punching member.   The control means sets the number of operations of the perforating member a predetermined number of times so that debris blown to the accommodating portion by the perforating member is sequentially accommodated in the accommodating portion from the back side to the front side in the moving direction of the perforating member. 2. The sheet processing apparatus according to claim 1, wherein the moving speed of the perforating member is decreased every time the number is exceeded.   Each time the punching member exceeds a predetermined number of times, the control means repeats the operation of sequentially storing the scrap in the housing part from the rear side in the moving direction of the punching member to the near side. 3. The sheet processing according to claim 2, wherein the sheet processing according to claim 2 is repeated such that the moving speed of the sheet is reduced from a moving speed for storing the waste to the back side in the moving direction to a moving speed for storing the waste to the near side. apparatus.   The control means has a predetermined number of operations of the perforating member so that debris that is blown to the housing portion by the perforating member is sequentially housed in the housing portion from the front side to the back side in the movement direction of the perforating member. 2. The sheet processing apparatus according to claim 1, wherein a moving speed of the perforating member is increased every time the number is exceeded.   The control means repeats the operation of sequentially accommodating the waste in the accommodating portion from the front side to the rear side in the movement direction of the perforating member, each time the perforating member exceeds a predetermined number of times. 5. The sheet processing according to claim 4, wherein the sheet processing according to claim 4 is repeated such that the moving speed is increased from a moving speed for storing the waste toward the front side in the moving direction to a moving speed for storing the waste toward the back side. apparatus.   The sheet processing apparatus includes a storage unit that stores the number of operations of the punching member, and the control unit changes a moving speed of the punching member according to the number of operations of the punching member stored in the storage unit. The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus. The container is detachable from the sheet processing apparatus,
The sheet processing apparatus includes presence / absence detection means for detecting presence / absence of the storage unit,
7. The sheet processing apparatus according to claim 6, wherein when the detection signal of the presence / absence detection unit changes from the presence / absence of the storage unit, the number of operations of the punching member stored in the storage unit is reset.   The sheet processing apparatus according to claim 1, wherein the control unit increases the moving speed of the punching member as the basis weight of the sheet increases.   8. The control device according to claim 1, wherein, when punching a sheet having a coating on the surface, the control unit slows down the moving speed of the punching member as compared with a sheet without coating. 9. The sheet processing apparatus according to 1.   The sheet processing apparatus according to claim 1, wherein the control unit increases the moving speed of the perforating member as the amount of toner on the sheet on which the image is formed increases. The punching means can be replaced with a punching member having a different punching area for the sheet,
The sheet processing apparatus according to claim 1, wherein the control unit increases the moving speed of the perforating member as the perforation area by the perforating member increases.   12. The sheet processing apparatus according to claim 1, wherein the sheet processing apparatus is a sheet processing apparatus that is detachably connected to an image forming apparatus having an image forming unit that forms an image on a sheet. Sheet processing device.   12. An image forming apparatus comprising: an image forming unit that forms an image on a sheet; and a sheet processing device that performs processing on a sheet image-formed by the image forming unit. An image forming apparatus comprising the sheet processing apparatus according to claim 1.

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