JP4208361B2 - Sheet punching apparatus and image forming apparatus provided with the apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet punching device that punches holes in a sheet, and an image forming apparatus such as a copying machine, a printer, a facsimile, and a composite device including the sheet punching device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a sheet punching device has a number of punches and dies corresponding to the number of holes drilled in a sheet, and punches holes in a sheet while the punches enter the holes of the die.
[0003]
[Problems to be solved by the invention]
However, the conventional sheet punching device has only a combination of punches and dies corresponding to the number of holes per sheet. For this reason, the wear of the punch and the die is fast, the punch and the die must be frequently replaced, and the punching efficiency for the sheet is low.
[0004]
In addition, since the number of holes that can be opened in a sheet differs depending on each country, if a conventional sheet punching apparatus is made to correspond to the specifications of one country, it cannot be made to correspond to the specifications of another country.
[0005]
For example, in Japan, two holes are often made in a sheet, and if two holes are made, the specification for making three holes like the United States could not be supported.
[0006]
For this reason, every time the number of holes is changed, the sheet punching device must be stopped and the punch and die must be exchanged, resulting in low drilling efficiency.
[0007]
Further, an image forming apparatus provided with a conventional sheet punching device has a low efficiency in forming an image on a sheet because the punching efficiency of the sheet punching device is low.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet punching device that has a high punching efficiency and can quickly respond to a change in the number of punches, and an image forming apparatus including the sheet punching device. Yes.
[0019]
[Means for Solving the Problems]
  The sheet punching device of the present invention is adapted to open a hole in a sheet while allowing a punch to enter a hole of a die,Divided into several groupsAt least one hole row of a die formed by arranging a plurality of holes of the die;Corresponding to the group of hole rowsThe same number of punch rows as the hole rows formed by arranging a plurality of the punches, along the punch rowsCorresponding to the plurality of groupsA plurality of cam members arranged to be reciprocally movable at a plurality of positions and having a plurality of cams corresponding to the punches of the punch row,SaidCamOf the plurality of movement positions, the selected movement positionCorrespondingGroupThe punch is moved so as to enter the hole of the hole array of the die.
[0020]
  The sheet punching device of the present invention is adapted to open a hole in a sheet while allowing a punch to enter a hole of a die,Divided into several groupsAt least one hole row of a die formed by arranging a plurality of holes of the die;Corresponding to the group of hole rowsThe same number of punch rows as the row of holes formed by arranging a plurality of the punches, the punch rows arranged so as to be movable along the punch rows, and each of the punch rowsgroupA plurality of cam members having a plurality of cams corresponding to the cam member, and the cam of the cam member corresponds to the movement of the selected cam member among the plurality of cam members.GroupThe punch is moved so as to enter the hole of the hole array of the die.
[0021]
  Sheet punching device of the present inventionA plurality of hole arrays of the die are provided corresponding to a plurality of groups.
[0022]
  The sheet punching device of the present invention is adapted to open a hole in a sheet while allowing a punch to enter a hole of a die,Divided into several groupsAt least one hole row of a die formed by arranging a plurality of holes of the die;Corresponding to the group of hole rowsThe same number of punch rows as the hole rows formed by arranging a plurality of the punches, along the punch rowsCorresponding to the plurality of groupsA plurality of guide members disposed in a plurality of positions so as to be reciprocally movable and having a plurality of guide grooves corresponding to the punches of the punch row,Of the plurality of guide grooves, selectedGuide grooveOf the corresponding groupThe punch is moved so as to enter the hole of the hole array of the die.
[0023]
  The sheet punching device of the present invention is adapted to open a hole in a sheet while allowing a punch to enter a hole of a die,Divided into several groupsAt least one hole row of a die formed by arranging a plurality of holes of the die;Corresponding to the group of hole rowsThe same number of punch rows as the row of holes formed by arranging a plurality of the punches, the punch rows arranged so as to be movable along the punch rows, and each of the punch rowsgroupA plurality of guide members having a plurality of guide grooves corresponding to the guide member, and the guide grooves of the guide members correspond to the movement of the selected guide member among the plurality of guide members.GroupThe punch is moved so as to enter the hole of the hole array of the die.
[0024]
  Sheet punching device of the present inventionA plurality of hole arrays of the die are provided corresponding to a plurality of groups.
[0025]
The sheet punching device according to the present invention includes biasing means for biasing the punch in a direction in which the punch is separated from the hole of the die.
[0029]
The sheet punching device of the present invention is operated by the cam in the punch and die holes actuated by the cam at one movement position among the plurality of movement positions of the cam member, and by the cam at another movement position. The diameter of the punch to be made and the hole of the die are made different.
[0030]
In the sheet punching device of the present invention, a diameter of a punch and die hole corresponding to at least one of the plurality of cam members, and a diameter of a punch and die hole corresponding to another cam member are determined. It is different.
[0031]
The sheet punching device of the present invention includes a punch and die hole diameter operated by the guide groove at one of the plurality of movement positions of the guide member, and the guide groove at another movement position. The diameter of the punch actuated by the die and the hole of the die are made different.
[0032]
In the sheet punching device of the present invention, the punch and die hole diameters corresponding to at least one of the plurality of guide members and the punch and die hole diameters corresponding to the other guide members are determined. It is different.
[0033]
An image forming apparatus according to the present invention includes an image forming unit that forms an image on a sheet supplied from the sheet stacking unit, and any one of the sheet holes that forms a hole in the sheet on which an image is formed by the image forming unit. And a dawn device.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present inventionReference examples andEmbodiments will be described with reference to the drawings.
[0035]
FIG. 1 is a schematic front sectional view showing an internal structure of a copying machine 1000 according to an embodiment of the present invention.
[0036]
The copying machine 1000 includes an original feeding unit 100, an image reader unit 200, an image forming unit 300, a tri-fold processing unit 400 that folds a sheet into a Z shape, a bi-fold processing unit 500 that folds a sheet in two, a finisher 600, and It has an inserter 900 and the like.
[0037]
Sheets include plain paper, thin resin sheets that are substitutes for plain paper, postcards, cardboard, sealed letters, and plastic thin plates.
[0038]
FIG. 2 is a control block diagram of the copying machine 1000.
[0039]
The CPU circuit unit 301 includes a CPU (not shown), and in accordance with a control program stored in the ROM 302 and a setting of the operation unit 303, a document feeding control unit 304, an image reader control unit 305, an image signal control unit 306, an image The forming unit controller 307, the three-fold controller 160, the two-fold controller 217, the finisher controller 525, the inserter controller 911, and the like are controlled.
[0040]
Then, the document feeding control unit 304 performs the document feeding unit 100, the image reader control unit 305 performs the image reader unit 200, the image forming unit control unit 307 performs the image forming unit 300, and the trifold control unit 160 performs the trifold processing. The part fold control unit 217 controls the half fold control unit 500, the finisher control unit 525 controls the finisher 500, and the inserter control unit 911 controls the inserter 900.
[0041]
The operation unit 303 includes a plurality of keys for setting various functions related to image formation, a display unit for displaying a setting state, and the like, and outputs a key signal corresponding to the operation of each key by the user to the CPU circuit unit 301. Based on the signal from the CPU circuit unit 301, the corresponding information is displayed on the display unit.
[0042]
The RAM 308 is used as an area for temporarily storing control data and a work area for operations associated with control. An external I / F 309 is an interface between the copying machine 1000 and an external computer 310, and print data from the computer 310 is expanded into a bitmap image and output as image data to the image signal control unit 306. .
[0043]
Also, an image of the original read by the image sensor 109 is output from the image reader control unit 305 to the image signal control unit 306.
[0044]
The image forming unit controller 307 outputs the image data from the image signal controller 306 to the exposure controller 110.
[0045]
(Original feeding unit 100, image reader unit 200)
Referring to FIG. 1, a document is set on tray 1001 of document feeder 100 in an upright state as viewed from the user and in a face-up state (the surface on which an image is formed is facing upward). It is assumed that The binding position of the document is assumed to be located at the left end portion of the document.
[0046]
Documents set on the tray 1001 are conveyed by the document feeder 100 one by one from the first page in the left direction (in the direction of arrow A in the figure), that is, with the binding position as the leading edge. Then, the document is conveyed from the left to the right on the platen glass 102 through a curved path, and is then discharged onto the paper discharge tray 112.
[0047]
At this time, the scanner unit 104 is held in a predetermined position, and a document reading process is performed when the document passes through the scanner unit 104 from left to right. This reading method is referred to as document scanning.
[0048]
When the document passes over the platen glass 102, the document is irradiated by the lamp 103 of the scanner unit 104, and reflected light from the document is guided to the image sensor 109 via the mirrors 105, 106, 107 and the lens 108.
[0049]
It is also possible to perform document reading processing by temporarily stopping the document conveyed by the document feeding unit 100 on the platen glass 102 and moving the scanner unit 104 from left to right in this state. This reading method is referred to as fixed document reading.
[0050]
When reading a document without using the document feeding unit 100, the user lifts the document feeding unit 100 and sets the document on the platen glass 102. In this case, the above-described original fixed reading is performed.
[0051]
(Image forming unit)
The document image data read by the image sensor 109 is subjected to predetermined image processing and sent to the exposure control unit 110. The exposure control unit 110 outputs laser light corresponding to the image signal. The laser light is irradiated onto the photosensitive drum 111 while being scanned by the polygon mirror 110a. An electrostatic latent image corresponding to the scanned laser beam is formed on the photosensitive drum 111.
[0052]
The electrostatic latent image formed on the photosensitive drum 111 is developed by the developing device 113 and visualized as a toner image. On the other hand, the sheet is conveyed to the transfer unit 116 from any of the cassettes 114 and 115, the manual sheet feeding unit 125, and the double-sided conveyance path 124.
[0053]
The visualized toner image is transferred to the sheet in the transfer unit 116. The sheet after the transfer is subjected to a fixing process in the fixing unit 117.
[0054]
Then, the flapper 121 is rotated by the operation of the plunger 123 by rotating the flapper 121 by the operation of the plunger 123, and once guided to the path 122. After the trailing end of the sheet has passed through the flapper 121, the sheet is switched back. Transport to pair 118. Then, the sheet is discharged from the image forming unit 300 by the discharge roller pair 118.
[0055]
As a result, the surface on which the toner image is formed can be discharged from the image forming unit 300 in a face-down state. This is called reverse paper discharge.
[0056]
As described above, when the sheet is discharged face down to perform image forming processing in order from the first page, for example, when performing image forming processing using the document feeder 100, or from a computer The page order can be aligned when image forming processing is performed on image data.
[0057]
When image forming processing is performed on a hard sheet such as an OHP sheet conveyed from the manual sheet feeding unit 125, the surface on which the toner image is formed is faced up without leading the sheet to the path 122 (face up). In this state, the paper is discharged from the image forming unit 300 by the discharge roller pair 118.
[0058]
When image forming processing is performed on both sides of the sheet, the sheet is guided straight from the fixing unit 117 toward the discharge roller pair 118, and the sheet is switched back immediately after the trailing edge of the sheet passes through the flapper 121. The flapper 121 leads to a double-sided conveyance path.
[0059]
However, when the sheet is reversed and discharged, the sheet may be curled while being switched back by the flapper 121. For example, the sheet may be curled and deformed into an upper curl (U-shape).
[0060]
In such a case, the sheet that passes through the three-fold processing unit 400 and the two-fold processing unit 500 and is discharged to the sample tray 701 or the stack tray 700 of the finisher 600 is deformed into an upper curl shape and is then discharged. It gets in the way of the seat.
[0061]
Therefore, the sheet reaching the pair of discharge rollers 509 of the sample tray 701 or the pair of discharge rollers 680 of the stack tray 700 is discharged at a faster speed than when the sheet is not reversed, thereby preventing sheet jamming during sheet discharge. is doing.
[0062]
In order to discharge the sheet at a higher speed than when the reverse discharge is not performed, the finisher control unit 525 described below discharges the discharge roller pair 509 of the sample tray 701 when the plunger 123 performs the reverse discharge operation. The counter motor 523 or the discharge roller pair motor 524 that rotates the discharge roller pair 680 of the stack tray 700 is controlled to rotate at high speed to discharge the sheet quickly.
[0063]
Incidentally, the sheet discharge speed when the sheet is not reversed is about 350 mm / s, but the sheet discharge speed when the sheet is reversed is about 450 mm / s.
[0064]
In the copying machine described above, the sheet curls in a U-shape, but when the sheet curls in an inverted U-shape (in this case, referred to as “lower curl”), the sheet jam is prevented in the same manner. can do.
[0065]
There is also a method in which when the sheet curls up or down by heat and is reversed, the sheet is curled in the opposite direction to cancel the curl.
[0066]
In this case, since the sheet discharged without inversion is curled, the sheet is jammed by increasing the sheet discharge speed when discharging the sheet without inversion more than the sheet conveyance speed when discharging the sheet with inversion. Can be prevented.
[0067]
Further, the sheet may curl when the sheet passes through a tri-fold processing unit 400, a two-fold processing unit 500, an inserter 900, and the like, which will be described later. Further, the sheet passing through the finisher 600 may be curled. These cases can be dealt with in the same manner.
[0068]
(Trifold processor 400)
With reference to FIG. 1, the sheet discharged from the image forming unit 300 by the discharge roller pair 118 is sent to the conveyance path 150 of the tri-fold processing unit 400. In the three-fold processing unit 400, the three-fold processing is performed so that the sheet is folded in a Z shape. For example, in the case of a sheet of A3 size or B4 size and the folding process is designated by the user from the operation unit 303 (see FIG. 2), the folding process is performed on the sheet discharged from the image forming unit 300. .
[0069]
On the other hand, in other cases, the sheet discharged from the image forming unit 300 is sent to the two-fold processing unit 500 without performing the folding process, or the two-fold processing unit 500 is passed through. It is sent to finisher 600 as it is.
[0070]
The three-fold processing unit 400 guides the sheet to be folded in three to the receiving conveyance path 152 shown in FIG. 3A by the flapper 151 shown in FIG. 1, conveys the sheet by the conveyance roller pair 153, and the sheet leading edge receiving stopper 154. Take it with.
[0071]
At this time, when the sheet collides with the sheet leading edge receiving stopper 154 vigorously, vibrates, or jumps on the sheet leading edge receiving stopper 154 and becomes inclined, the sheet is folded by the first and second folding rollers 155 and 156. The sheet cannot be folded parallel to the leading edge of the sheet, causing wrinkles on the sheet, or the sides of the sheet cannot be aligned, and one side protrudes from the other side. This may interfere with the conveyance of the sheet and cause jams.
[0072]
Therefore, in order to prevent the conveyed sheet from jumping on the sheet leading edge receiving stopper 154, when the leading edge of the sheet reaches slightly upstream from the sheet leading edge receiving stopper 154, the leading edge of the sheet is detected by the sheet leading edge detection sensor 157. Then, the tri-fold controller 160 (see FIG. 5) causes the transport motor M21 that rotates the transport roller 153 to stop for the first time, and after a predetermined time, starts (first start), The leading end is brought into contact with the sheet leading end receiving stopper 154.
[0073]
As a result, the sheet quietly lands on the sheet leading edge receiving stopper 154 without jumping on the sheet leading edge receiving stopper 154.
[0074]
Thereafter, the conveyance rollers 153 and 153 continue to convey the sheet while the leading edge of the sheet P is in contact with the sheet leading edge receiving stopper 154 by the conveyance motor M21 rotating at the original rotation speed. The sheet protrudes from the opening 159 of the guide wall 158 and approaches the nip portion of the first and second folding rollers 155 and 156 in a buckled state.
[0075]
When the sheet approaches the nip portion, the tri-fold control unit 160 causes the conveyance motor M21 to stop for the second time, and starts the second time after the vibration of the loop-shaped portion has subsided. For this reason, the loop-shaped portion is fed into the nip portion in a stable state. The second stop timing of the conveyance motor M21 is detected by the sheet leading edge detection sensor 157 before the sheet leading edge contacts the sheet leading edge receiving stopper 154, and then the conveyance motor M21 starts the first time. Based on the number of revolutions from
[0076]
When the sheet approaches the sheet leading edge receiving stopper 154 or approaches the nip portion, the transport motor M21 is temporarily stopped (the first and second stops), but may be rotated at a reduced speed. .
[0077]
Therefore, the sheet is decelerated or temporarily stopped immediately before contacting the sheet leading edge receiving stopper 154 and immediately before being fed into the nip portion of the first and second folding rollers 155 and 156, and thus wrinkles are generated. Without being bent, it can be folded in exactly two.
[0078]
After that, as shown in FIG. 3B, the first and second folding rollers 155 and 156 fold the sheet P and convey it. Just before the folded end of the sheet comes into contact with the sheet folded end receiving stopper 161, the folding is detected by the sheet folded end detection sensor 162, and the folding unit 160 (see FIG. 5) drives the second folding roller 156. The drive motor M22 is stopped for the third time. As a result, the folded end of the sheet is gently brought into contact with the sheet folded end receiving stopper 161 by the inertial rotation of the folding rollers 156 and 159, and tilts or jumps with respect to the sheet folded end receiving stopper 161. There is nothing.
[0079]
The bending drive motor M22 rotates the three bending rollers 156, 155, and 164.
[0080]
Then, as shown in FIG. 4A, after the folded end of the sheet comes into contact with the sheet folded end receiving stopper 161, the tri-fold control unit 160 starts the folding drive motor M22 for the third time. This third start is performed a predetermined time after the sheet folding end detection sensor 162 detects the sheet folding end.
[0081]
Note that when the sheet approaches the folded sheet edge stopper 161, the conveyance motor M22 is stopped for the third time, but may be rotated at a reduced speed.
[0082]
Thereafter, as shown in FIG. 4 (b), the sheet portion starts to buckle at the portion of the sheet facing the lower end of the bending guide 163, the portion becomes a loop, and has already been folded in half. Together, the nip portions of the second and third folding rollers 156 and 164 are approached.
[0083]
When the looped portion approaches the nip portions of the second and third folding rollers 156 and 164 to some extent, the three-fold control unit 160 causes the folding drive motor M22 to stop for the fourth time. This eliminates the vibration of the looped portion. The fourth rotation stop of the bending drive motor M22 is performed a predetermined time after the bending drive motor M22 starts the third start.
[0084]
After the folding drive motor M22 has stopped rotating for the fourth time for a predetermined time, after a predetermined time, the folding drive motor M22 starts for the fourth time and moves the loop-shaped portion of the sheet to the second and third folding rollers 156. , 164. As a result, the sheet is accurately folded in three without being wrinkled, and discharged from the second and third folding rollers 156 and 164.
[0085]
Thereafter, the sheet passes through the delivery conveyance path 165 shown in FIGS. 1 and 3, and is fed into the half-folding processing unit 500 by the discharge roller pair 166 shown in FIG.
[0086]
The above operation is automatically performed by the tri-fold controller 160 shown in FIG.
[0087]
In the above-described operation of the three-fold processing unit 400, the folding drive motor M22 is stopped and started four times, but even if only the fourth stop and start are performed, no wrinkle is generated on the sheet. It can also be bent accurately.
[0088]
Further, the folding end portion end detection sensor 162 is not necessarily required, and the sheet folding control can be performed only by the sheet leading end detection sensor 157.
[0089]
In this case, the folding drive motor M22 is stopped for the third time and the fourth time, and after the sheet comes into contact with the sheet leading edge receiving stopper 154, the trailing edge of the sheet as it leaves the sheet leading edge receiving stopper 154 (until the leading edge until then). ) May be performed with reference to the time when the sheet leading edge detection sensor 154 detects.
[0090]
In addition, as shown in FIG. 1, the trifold processing unit 400 includes an auxiliary transport connected to the receiving transport path 152 so that a sheet can be received and folded into a trifold from an inserter 900 described later. A path 167 and auxiliary conveying roller pairs 168 and 168 are provided.
[0091]
In the above-described three-fold processing unit 400, the first to third folding rollers 155, 156, and 164 hold the sheet after the entire width direction of the sheet is securely adhered to the two rollers when the sheet is held at the nip portion. If you do, you can bend the sheet accurately.
[0092]
For this purpose, if the friction coefficient of the first to third folding rollers 155, 156, and 164 with respect to the sheet is too large, the roller may draw the sheet before the entire width direction of the sheet is in close contact with the roller. It is necessary to reduce the friction coefficient of the first to third bending rollers 155, 156, and 164.
[0093]
When the friction coefficients of the first to third bending rollers 155, 156, and 164 are reduced, the rollers are less likely to slip with respect to the sheet and pull in the sheet when the roller starts to sandwich the sheet.
[0094]
Therefore, since the sheet is pressed between the rollers and the entire width direction is brought into close contact with the roller, and then the sheet is pressed into the nip portion, the sheet is accurately folded in three without causing wrinkles.
[0095]
Specifically, the friction coefficient of each roller is preferably in the range of about 0.7 to about 0.8. Preferably, the friction coefficient of the third folding roller is about 0.6. In this case, for example, when silicone oil is applied to the surface of the rubber roller, the above friction coefficient can be obtained. Of course, the above friction coefficient can also be obtained by changing the material and the surface roughness of the roller surface.
[0096]
Further, as shown in FIG. 6, CR (neoprene) rubber having a hardness of about 70 degrees to about 90 degrees is used for the roller, and the diameter of the center of the roller is set to be smaller than the diameter of the end portion. When a downward gradient of about 0.112 degrees from the end toward the center is provided, the sheet is conveyed while being pulled in the width direction at both ends of the roller, and the sheet is accurately folded without causing wrinkles on the sheet. be able to. The hardness is a value based on JIS K6301.
[0097]
Further, as shown in FIGS. 7 to 9, relief portions 174 and 174 are formed on the outer circumferences of the first to third rollers 171, 172 and 173, leaving a part of the direction parallel to the roller axis and the rotational direction. When the sheet is started to be nipped, the sheet is nipped between the axial remaining portions 175 in a direction parallel to the axis of the roller remaining by the escape portion 174, and the roller remaining by the escape portion 174 is rotated during the rotation of the roller. If the sheet is nipped and conveyed by the rotation direction remaining portion 176 in the rotation direction, the sheet is not nipped and conveyed by the entire roller during conveyance of the sheet, so that the sheet may be wrinkled. Disappear.
[0098]
The number of rotation direction remaining portions 176 shown in FIG. 7 is one in FIG. 7 and two in FIG. 8, and the number is not limited. Also, as shown in FIG. 9, three sheets may be formed, and the sheet may be sandwiched and conveyed at one center, and the two at both ends may be in direct contact to prevent the rollers from tilting.
[0099]
Further, the escape portion may be formed on one side of the roller. In this case, at the start of rotation of the roller pair, the roller pair folds the sheet by sandwiching the sheet between the remaining roller in the direction parallel to the axis of the roller remaining by the escape portion and the other roller, and rotating the roller pair. The sheet is nipped and conveyed between the rotation direction remaining portion in the rotation direction of the roller left by the escape portion and the other roller.
[0100]
(Folding processing unit 500)
Referring to FIG. 10, the two-fold processing unit 500 binds the sheet bundle that has passed through the three-fold processing unit 400 (see FIG. 1) based on an instruction from the operation unit 303 (see FIG. 2). Or, it is folded in two without binding, and discharged to the outside of the copying machine 1000.
[0101]
The sheet that has passed through the tri-fold processing unit 400 is conveyed through the entrance rollers 201 and 201, guided by the flapper 202, and stored in the storage guide 204 via the transport rollers 203 and 203. If the folding process unit 500 does not perform the process of folding the sheet in half, the flapper 202 guides the sheet to the finisher 600.
[0102]
The sheets conveyed by the conveying roller 203 are sequentially conveyed by a predetermined number of sheets until the leading edge of the sheet comes into contact with the movable sheet positioning member 205 and are stored in a bundle on the sheet positioning member 205.
[0103]
Further, two pairs of staplers 206 are provided on the downstream side of the conveying roller 203, that is, in the middle of the storage guide 204, and an anvil 207 is provided at a position facing the stapler 206. The stapler 206 cooperates with the anvil 207 to bind the center of the sheet bundle.
[0104]
A folding roller pair 208 is provided on the downstream side of the stapler 206, and a protruding member 209 is provided at a position opposite to the folding roller pair 208. By projecting the protruding member 209 toward the sheet bundle stored in the storage guide 204, the sheet bundle is pushed out between the pair of folding rollers 208 and folded by the pair of folding rollers 208. Then, the paper is discharged to the discharge tray 211 via the paper discharge roller 210.
[0105]
Further, when the sheet bundle bound by the stapler 206 is folded, the positioning member 205 is set to the sheet size so that the staple position of the sheet bundle comes to the center position (nip point) of the pair of folding rollers 208 after the staple processing is completed. At the same time, a predetermined distance is lowered from the place at the time of stapling. Accordingly, the sheet bundle can be folded around the position where the stapling process is performed.
[0106]
Similarly to the three-fold processing unit 400, the two-fold processing unit 500 can receive a sheet from a later-described inserter 900 so that the sheet can be folded in two, or the finisher 600 can be folded into two without being folded. The auxiliary conveyance path 212 connected to the entrance rollers 201 and 201 and the auxiliary conveyance rollers 213 and 213 are provided.
[0107]
An entrance sensor 214 that detects the entrance of a sheet is provided at the entrance of the folding unit 500, and a sheet size detection sensor 215 that detects the size of the passing sheet is provided on the downstream side of the conveyance roller 203. A discharge sensor 216 that detects discharge of the sheet bundle is provided in the vicinity of the outlet.
[0108]
The two-fold processing unit 500 is controlled by a two-fold control unit 217 shown in FIG.
[0109]
(Inserter 900)
In FIG. 10, an inserter 900 is used when, for example, a cover sheet is supplied without passing through the image forming unit 300.
[0110]
A sheet bundle stacked on the tray 901 is conveyed by a sheet feeding roller 902 to a separation unit including a conveyance roller 903 and a separation belt 904. Then, the sheet is separated one by one from the uppermost sheet by the conveying roller 903 and the separation belt 904. Then, the separated sheet is conveyed to the auxiliary conveyance path 212 of the two-fold processing unit 500 by a drawing roller pair 905 adjacent to the separation unit.
[0111]
A paper set sensor 910 that detects whether or not a sheet is set is provided between the paper feed roller 902 and the transport roller 903. Further, a paper feed sensor 907 that detects whether or not a sheet is conveyed by the drawing roller pair 905 is provided in the vicinity of the drawing roller pair 905.
[0112]
Further, the inserter 900 can be provided not only in the two-fold processing unit 500 but also in the three-fold processing unit 400 to supply the sheet to the auxiliary conveyance path 167 of the three-fold processing unit 400.
[0113]
The inserter 900 is controlled by an inserter control unit 911 shown in FIG.
[0114]
(Finisher 600)
In FIG. 10, the finisher 600 takes in the sheets from the image forming unit 300 conveyed via the two-fold processing unit 500, aligns the plurality of taken-in sheets and bundles them as one sheet bundle, and after the sheet bundle Sheet post-processing such as stapling processing (binding processing) for stapling the end side, sorting processing, non-sorting processing, and bookbinding processing is performed.
[0115]
As illustrated in FIG. 10, the finisher 600 includes a finisher roller 502 provided with an entrance roller pair 502 that takes a sheet from the image forming unit 300 conveyed through the two-fold processing unit 500 into the apparatus, and a conveyance roller pair 503. It has a path 504.
[0116]
The sheet guided to the finisher path 504 is conveyed toward the buffer roller 505 via the conveyance roller pair 503. The conveyance roller pair 503 and the buffer roller 505 can be rotated forward and backward.
[0117]
An entrance sensor 531 is provided between the entrance roller pair 502 and the transport roller pair 503.
[0118]
A punch unit 508, which will be described later, is provided between the conveyance roller pair 503 and the buffer roller 505. The punch unit 508 is operated as necessary, after the sheet conveyed via the conveyance roller pair 503. A perforation process is performed near the end.
[0119]
The buffer roller 505 is a roller capable of winding a predetermined number of sheets conveyed via the conveying roller pair 503, and the sheet is wound by the pressing rollers 512, 513, and 514 while the roller 505 is rotating. The sheet wound around the buffer roller 505 is conveyed in the direction in which the buffer roller 505 rotates.
[0120]
A switching flapper 510 is provided between the pressing roller 513 and the pressing roller 514, and a switching flapper 511 is provided on the downstream side of the pressing roller 514. The switching flapper 510 peels the sheet wound around the buffer roller 505 from the buffer roller 505 and guides it to the non-sort path 521 or the sort path 522.
[0121]
The switching flapper 511 peels the sheet wound around the buffer roller 505 from the buffer roller 505 and guides the sheet to the sort path 522, and in the state where the sheet wound around the buffer roller 505 is wound around the buffer path 523. It also comes to guide.
[0122]
The sheet guided to the non-sort path 521 by the switching flapper 510 is discharged onto the sample tray 701 via the discharge roller pair 509. In the middle of the non-sort path 521, a paper discharge sensor 533 for jam detection is provided.
[0123]
On the other hand, the sheets guided to the sort path 522 by the switching flapper 510 are stacked on the intermediate tray 630 via the conveyance roller pairs 506 and 507. The sheet bundle stacked in a bundle on the intermediate tray 630 is subjected to alignment processing and stapling processing according to the setting from the operation unit 303 (see FIG. 2), and thereafter, the stack tray 700 by discharge rollers 680a and 680b. Discharged to the top.
[0124]
The stapling process described above is performed by the stapler 601. The sample tray 701 and the stack tray 700 are configured to be capable of self-propelling in the vertical direction.
When the sheet bundle is discharged from the intermediate tray 630 to the stack tray 700, the processing tray 631 (see FIGS. 1 and 10) protrudes outside the copying machine 1000 so that the sheet bundle can be reliably stacked on the stack tray 700. It has become.
[0125]
(Punch unit 508 of finisher 600)
The punch unit 508 is elongated in the front and back directions of FIGS. 1 and 10.
[0126]
FIG. 11 is a front view of the punch unit 508 when the copying machine 1000 shown in FIGS. 1 and 10 is viewed from the front. FIG. 12 is a left side view of the punch unit 508 when the copying machine 1000 shown in FIGS. 1 and 10 is viewed from the left side. FIG. 13 is a front partial sectional view of the punch unit 508 of FIG. FIG. 14 is a view taken along arrow 14-14 in FIG. FIG. 15 is a plan view of the punch and die of the punch unit 508. 16 to 18 are diagrams for explaining the operation of the punch and the die.
[0127]
The punch unit 508 includes a punch 541, a die 542, a punch waste discharging screw 543, a punch waste box 544, and the like.
[0128]
The punch unit 508 punches holes at the trailing edge of the sheet conveyed by the conveying roller pair 503 with a punch 541 and a die 542 based on a hole forming instruction from the operation unit 303 (see FIG. 2) of the copier 1000. Thus, it is sent to the buffer roller 505.
[0129]
Further, as shown by arrows in FIG. 13, punch scrap generated when the hole is drilled falls from the punch scrap discharge portion 579 of the casing 550 onto the screw 543 and is conveyed to the punch scrap box 544 by the screw 543. When a predetermined amount is accumulated, it is detected by a punch scrap detection sensor 545 provided on the inner wall of the punch scrap box 544 and can be discarded together. A circulating belt may be used instead of the screw.
[0130]
12, 13, and 15 to 18, the punch 541 and the die 542 are provided on the rotary shafts 559 and 560, and the rotary shafts 559 and 560 are pivotally supported by the casing 550, so that they mesh with each other. The gears 551 and 552 are linked to each other so that the rotational force of the punch drive motor 553 is received by the gear 551 via the idle gear 553 and rotated in the directions of arrows B and C. Normally, the punch 541 and the die 542 are held at the home position shown in FIG.
[0131]
In FIG. 10, the sheet trailing edge detection sensor 555 disposed between the conveying roller pair 502 and the punch unit 508 detects the trailing edge of the sheet and then drives the punch driving motor 553 at a predetermined timing. The punch 541 and the die 542 make a hole in the vicinity of the rear end of the sheet P while rotating synchronously in the directions of arrows B and C, as shown in FIGS. The perforated sheet is wound around the buffer roller 505.
[0132]
Incidentally, a groove-like relief portion 556 is formed on the outer periphery of the tip portion of the punch 541. The escape portion 556 is formed to prevent the punch 541 from coming into contact with the corner of the hole 546 of the die 542 when entering the die 542 and exiting from the die 542.
[0133]
However, when the punch 541 is separated from the die 542 after the punch 541 has made a hole in the sheet P with the die 542, the escape portion 556 may be caught on the edge of the hole just formed, and the sheet P may be damaged.
[0134]
  So bookReference exampleIn the punch unit 508, a sheet position regulation guide plate 558 is provided on a pair of guide plates 557a and 557b facing each other between the punch 541 and the die 542 so as to guide the sheet. 19, the pair of guide plates 557a and 557b includes a rotation locus circle C1 at the center of the tip of the punch 541 and a rotation locus circle C2 of the die 542 (the rotation locus circle C2 of the die 542 is a cross section of the die). It is arranged at the same distance (L2) away from the path center PC passing through the two intersections O1 and O2 with the circular outer shape itself being a rotation locus. The sheet position restriction guide plate 558 is disposed between the guide plate 557 a on the punch 541 side and the outer periphery of the die 542.
[0135]
Accordingly, the distance (L1) between the pass center PC and the sheet position restriction guide plate 558 is set to be shorter than the distance (L2), and the sheet position restriction guide plate 558 is separated from the rotation locus circle C2.
[0136]
As a result, the sheet is guided by the sheet position regulation guide plate 558 closer to the die side than before, so that the punch that has finished drilling does not always engage with the hole in the sheet. The sheet can be quickly and quickly removed from the hole of the sheet. Therefore, the escape portion 556 of the punch 541 is not caught on the edge of the hole where the escape portion 556 has just been opened, and the punch 541 does not damage the sheet.
[0137]
The escape portion 556 is not necessarily formed depending on the thickness and length of the punch 541, the diameter of the die 542, and the diameter of the hole 546. Even in this case, the tip of the punch is not caught in the hole of the sheet, and the sheet is not damaged.
[0138]
Further, instead of providing the sheet position restriction guide plate 558 on the guide plate 557a, the guide plate 557a itself may be disposed at the position of the sheet position restriction guide plate 558.
[0139]
Further, as shown in FIG. 21, two punches 541 are provided on the rotary shaft 559 so as to protrude in the rotation direction at intervals of 180 degrees, and two die holes 546 are formed in the die 542 at intervals of about 180 degrees in the rotation direction. Also good. Alternatively, although not shown, three punches 541 may be protruded at intervals of 120 degrees to form three die holes 546.
[0140]
That is, if the punch and die hole are not completely separated from the punch and die hole after the hole has been drilled in the sheet, the punch and die hole should not be fitted to each other. Good.
[0141]
In this manner, when a plurality of punches 541 and die holes 546 are provided in the rotation direction, it is not necessary to rotate the punch or die once every time a hole is made in the sheet, and accordingly, holes can be made in the sheet at a high speed. . Further, when a plurality of punch and die holes are provided, the wear of the punch and die holes is reduced accordingly, and the punch and die can be used for a long time.
[0142]
Further, the punch unit 508 described above has two sets of punches 541 and dies 542 arranged in the axial direction of the rotation shafts 559 and 560 so as to correspond to Japanese specifications so that two holes can be made at a time on the sheet. However, three sets may be arranged to correspond to American specifications, and three holes may be drilled at a time in the sheet, and four sets are arranged to correspond to specifications in European countries. And four holes may be formed in the sheet at a time, and the number of holes that can be formed in the sheet is not limited.
[0143]
Further, as shown in FIG. 22, by providing the rotary shafts 559 and 560 with the five punches 541 and the die 542 apart from each other and with the opposite sides facing each other, one punch unit 541 The case where two holes are made in the sheet and the case where three holes are made can be dealt with, and the use range can be widened.
[0144]
In this case, the initial positions of the punches of the 2-hole punch row 541A and the 3-hole punch row 541B and the 2-hole hole row 546A and the 3-hole hole row 546B of the die are as shown in FIG. The flag 561 provided in the two-hole sensor 562 is detected by any one of the two-hole sensor 562 and the three-hole sensor 563 and is set.
[0145]
Also, the punch and die rotate 360 degrees to make two or three holes in the sheet, but since the holes are made in the rear end of the sheet, the punch and die for two holes make holes in the sheet. When the rotary shafts 559 and 560 rotate and the punch and die for three holes are fitted to each other, the sheet in which the two holes are opened has already passed between the punch and the die, and for three holes. The punch and die do not make three holes in a sheet with two holes. Similarly, it is not possible to open two holes in a sheet having three holes.
[0146]
Furthermore, although the die 542 is provided separately for each hole 546 in the rotating shaft 560, it may be a single cylindrical die in which a plurality of die holes are formed.
[0147]
  (otherReference examplePunch unit)
  In the punch unit described above, the punch 541 and the die 542 rotate only in one direction. However, as shown in FIG. 36, the number of punches 541 differs on the rotary shaft 580 that reciprocates and moves up and down. There is also a unit in which a plurality of rows 541A and 541B are provided in the rotational direction, the rotary shaft 580 is reciprocally rotated, the different punches are opposed to the holes 542 of the die 581, and the entire rotary shaft 580 is lowered to make holes in the sheet. . Even in this case, there is an advantage that holes can be efficiently formed in the sheet as in the above punch unit.
[0148]
  As shown in FIG. 13, FIG. 15 to FIG. 19, FIG. 21 to FIG. 23, and FIG.Reference exampleIn this punch unit, the diameter of the punch and the diameter of the hole of the die corresponding to the punch are all the same, but the diameter of the punch of at least one punch row and the die corresponding to the punch are out of the plurality of punch rows. The diameter of the holes may be different from the diameters of the punches in the other punch rows and the diameters of the dies corresponding to the punches.
[0149]
  (And otherReference examplePunch unit)
  The punch units shown in FIGS. 13, 15 to 19, and 21 to 23 are so-called rotary punch units in which the punch 541 rotates to make a hole in the moving sheet.
[0150]
The punch unit shown in FIG. 36 is a so-called reciprocating punch unit in which a plurality of punches 541 are provided on a rotating shaft 580 and lifted and lowered together with the rotating shaft 580 to make a hole in a stopped sheet. However, when selecting the punch 541 to be used, it is necessary to ensure that the tip of the punch 541 is aligned with the die 542 in order to rotate the rotary shaft 580.
[0151]
The punch unit 1040 shown in FIG. 37 to FIG. 46 is a so-called reciprocating punch unit, and the punches 1028 and 1029 are always opposed to the holes 1031 and 1032 of the die, and the positions thereof coincide with each other. .
[0152]
This punch unit 1040 has three or two holes at the rear end (downstream end) of the sheet conveyed in the front and back direction of the sheet of FIG. 37, with die holes 1031 and 1032 and descending punches 1028 and 1029. , Can be selectively dawn.
[0153]
The rotational force of the drive motor 1004 provided on the frame 1003 and capable of rotating in the forward and reverse directions is integrated with a drive gear 1006 provided on the drive shaft 1005 of the drive motor 1004 and a support shaft 1007 provided on the frame 1003. A reduced idle rotation is transmitted to the cam drive shaft 1010 via a diameter idle gear 1008, a small idle gear 1009, and a driven gear 1011 provided integrally with a cam drive shaft 1010 which is a rotation drive shaft. The cam drive shaft 1010 is rotatably provided on the frame 1003 via bearings 1012 and 1012 and is restricted from moving in the thrust direction.
[0154]
On the right end side of the cam drive shaft 1010, a three-hole detection flag 1020 and a two-hole detection flag 1021 are opposed to the three-hole detection sensor 1022 fixed to the frame 1003 and the two-hole detection sensor 1023. It is provided to do.
[0155]
Three eccentric cams 1025 for three holes and two eccentric cams 1026 for two holes are alternately fixed to the cam drive shaft 1010 by pins 1027, respectively. The three-hole eccentric cam 1025 and the two-hole eccentric cam 1026 are discs having the same diameter as shown in FIG. 38, but are provided on the cam drive shaft 1010 with different phases.
[0156]
The 3-hole eccentric cam 1025 and the 2-hole eccentric cam 1026 are respectively opposed to the 3-hole punch 1028 and the 2-hole punch 1029. The three-hole punch 1028 and the two-hole punch 1029 are inserted so as to be movable in the thrust direction by a cylindrical guide 1035 fixed to the frame 1003, and the three-hole eccentric cam 1025 and the two-hole eccentric by the return spring 1036. The cam 1026 is always in pressure contact with the outer periphery. The return spring 1036 is loosely fitted to each punch 1028, 1029, and is interposed between the retaining ring 1037 and the guide 1035 on each punch 1028, 1029.
[0157]
Note that the length of the guide 1035 is actually longer than the length shown in FIG. Further, when the punch unit 1040 is disposed upside down from the state of FIG. 37, the return spring 1036 is not necessarily required because the punch is separated from the die by its own weight.
[0158]
The tips of the punches 1028 and 1029 are respectively opposed to a three-hole hole 1031 for making three holes in the sheet formed in the die 1030 provided in the frame 1003 and a two-hole hole 1032 for making two holes in the sheet. ing.
[0159]
The die holes 1031 and 1032 and the punches 1028 and 1029 are arranged in a straight line in a direction perpendicular to the sheet conveying direction to form a die row 1033 and a punch row 1034, and the cam drive shaft 1010 is arranged along the punch row 1034. It is installed.
[0160]
The die 1030 is provided with a tiltable sheet detection flag 1038 that detects the passage of the sheet, and a sheet detection sensor 1039 that detects whether or not the sheet has passed by tilting the sheet detection flag 1038.
[0161]
In the above configuration, the punch unit 1040 detects the sheet that has entered between each punch and the die with the sheet detection flag 1038 and the sheet detection sensor 1039, and makes three or two holes at the trailing edge of the sheet.
[0162]
When three holes are made in the sheet, the three three-hole eccentric cams 1025 reciprocate within the region in the direction of arrows B1 and B2 as shown in FIG. 38 in order to operate the three three-hole punches 1028. The rotation angle of the cam drive shaft 1010 is controlled by the drive motor 1004 so as to move.
[0163]
The three three-hole eccentric cams 1025 that reciprocately rotate enter the three three-hole holes 1031 formed in the die 1030 against the three-hole punches 1028 at the long diameter portion 1025a against the return pre-rings 1036, respectively. 3 holes are made in the sheet by three 3-hole punches 1028.
[0164]
Further, when two holes are formed in the sheet, the two two-hole eccentric cams 1026 are reciprocated in the region in the directions of arrows A1 and A2 shown in FIG. 38 in order to operate the two two-hole pantins 1029. The rotation angle of the cam drive shaft 1010 is controlled by the drive motor 1004 so as to move.
[0165]
The two two-hole eccentric cams 1026 that reciprocate and rotate are two while the two two-hole punches 1029 enter the two two-hole holes 1032 of the die 1030 against the return pre-ring 1036 at the long diameter portion 1026a. Two holes are drilled in the sheet with the two-hole punch 1029.
[0166]
The reciprocating rotation of the eccentric cams 1025 and 1026 can be detected by the three-hole detection sensor 1022 and the two-hole detection sensor 1023 through the rotation state of the three-hole detection flag 1020 and the two-hole detection flag 1021. .
[0167]
When the 3-hole eccentric cam 1025 is reciprocatingly rotated, the 2-hole eccentric cam 1026 has a small-diameter portion 1026b that contacts the 2-hole punch 1029, so that the 2-hole punch 1029 approaches the sheet. There is no such thing as making holes.
[0168]
Further, even when the 2-hole eccentric cam 1026 is reciprocatingly rotated, the 3-hole eccentric cam 1025 has a small-diameter portion 1025b in contact with the 3-hole punch 1028, so that the 3-hole punch 1028 approaches the sheet. And there is no such thing as making a hole.
[0169]
The three-hole eccentric cam 1025 and the two-hole eccentric cam 1026 described above are configured to push down the three-hole punch 1028 and the two-hole punch 1029 against the return spring 1036, respectively, as shown in FIG. Further, the eccentric cams 1025 and 1026 and the punches 1028 and 1029 are connected by a swing connection link (motion direction changing member, swing connection member) 1050, and the rotation of the eccentric cams 1025 and 1026 is linearly moved by the punches 1028 and 1029. Alternatively, the punches 1028 and 1029 may be operated. In FIG. 40, the eccentric cam 1026 and the punch 1029 are not shown.
[0170]
In the swing connection link 1050, the link portion 1050 a is rotatably connected to the eccentric cams 1025 and 1026, and the shaft flange portion 1050 b is swingably connected to the punches 1028 and 1029 by a connection pin 1051. If a bearing (not shown) is interposed between the link portion 1050a and the eccentric cams 1025 and 1026, the eccentric cams 1025 and 1026 can be smoothly rotated with respect to the link portion 1050a.
[0171]
When the swing connection link 1050 is used, the return spring 1036 is not required, and the motion of the eccentric cams 1025 and 1026 can be reliably transmitted to the punches 1028 and 1029.
[0172]
In addition, since the punch unit 1040 shown in FIGS. 37 to 40 can open two holes or three holes, it has five eccentric cams, five punches, and five die holes. However, by increasing the number of holes in the eccentric cam, punch, and die, a larger number of holes can be formed in the sheet. Further, by changing the position of the eccentric cam attached to the cam drive shaft, the position of the sheet hole can also be changed.
[0173]
The diameters of the three-hole punch 1028 and the three-hole hole 1031 of the punch unit 1040 are the same as the diameters of the two-hole punch 1029 and the two-hole hole 1032, but may be different from each other.
[0174]
Therefore, in the punch unit 1040 shown in FIGS. 37 to 40, the number of holes opened in the sheet and the positions of the holes opened in the sheet are not limited.
[0175]
The punch unit 1040 described above can also cope with different specifications for the number of holes formed in the sheet.
[0176]
  (And otherReference examplePunch unit)
  The punch unit 1100 in FIG. 41 is also a reciprocating punch unit.
[0177]
In addition, the same code | symbol is attached | subjected about the same part as the punch unit 1040 shown in FIG. 37 thru | or FIG. 39, and description of the part is abbreviate | omitted.
[0178]
This punch unit 1100 tilts the lever 1101 in the direction of the arrow and moves the cam drive shaft 1110 as the rotational drive shaft to the left and right in FIG. 41 to select the three-hole eccentric cam 1025 and the two-hole eccentric cam 1026. Thus, the three-hole punch 1028 and the two-hole punch 1029 are brought into contact with each other.
[0179]
The cam drive shaft 1110 is provided with three three-hole eccentric cams 1025 and two two-hole eccentric cams 1026 alternately and integrally in the same phase (same direction). A receiving ring 1102 is also provided integrally.
[0180]
When the cam drive shaft 1110 is reciprocally rotated or rotated in one direction in the state of FIG. 41, two holes are formed in the sheet by the two-hole punch 1029 and the two-hole hole 1032 of the die 1030. The swinging state or rotating state of the two-hole swing cam 1026 at this time is detected by a detection flag 1141 and a detection sensor 1142 on the cam drive shaft 1110. The punch unit 1100 is in a state where two holes are formed in the sheet, which is detected by a hole number detection flag 1143 and a two-hole detection sensor 1144 integrated with the cam drive shaft 1110.
[0181]
When three holes are made in the sheet, from the state shown in FIG. 41, the eccentric motors 1025 and 1026 are directed upward in the figure by the drive motor 1004, and then the lever 1101 is tilted in the direction of the white arrow to drive the cam. Move axis 1110 to the right.
[0182]
At this time, the portion in contact with the three-hole punch 1028 is switched from the receiving ring 1102 to the small-diameter portion 1025b of the three-hole eccentric cam 1025. Further, the portion in contact with the 2-hole punch 1029 is switched from the small diameter portion 1026 b of the 2-hole eccentric cam 1026 to the receiving ring 1102.
[0183]
Since the outer periphery of the receiving ring 1102 and the small diameter portion 1025b and the small diameter portion 1026b are not stepped and are formed on the same plane, the receiving ring 110 and the small diameter when the cam drive shaft 1110 moves in the axial direction. The portion 1025b and the small diameter portion 1026b are not caught by the punches 1028 and 1029, and the cam drive shaft 1110 can be switched smoothly.
[0184]
Further, when the cam drive shaft 1110 moves rightward in FIG. 41, the driven gear 1011 remains engaged with the small-diameter idle gear 1140. Further, the detection flag 1141 is provided integrally with the cam drive shaft 1110 in the rotational direction so as to be movable in the axial direction. Therefore, even if the cam drive shaft 1110 moves in the axial direction, the detection flag 1141 is received by the detection sensor 1142. It always faces the detection sensor 1142.
[0185]
When the cam drive shaft 1110 moves to the right in FIG. 41, the hole number detection flag 1143 integrated with the cam drive shaft 1110 also moves to the right, switching from the 2-hole detection sensor 1144 to the 3-hole detection sensor 1145, It can be detected that the punch unit 1100 is in a state where three holes can be formed in the sheet.
[0186]
After the cam drive shaft 1110 is moved rightward in FIG. 41 as described above, the drive motor 1004 is controlled so that the eccentric cams 1025 and 1026 face the punches 1028 and 1029, and then the cam drive shaft 1110 When reciprocating or rotating in one direction, three holes can be made in the sheet.
[0187]
Thereafter, when two holes are made in the sheet, when the eccentric cams 1025 and 1026 are directed upward and the lever 1101 is tilted in the direction of the black arrow, the eccentric cams 1025 and 1026 are switched, and the state shown in FIG. Returning to step 2, two holes can be drilled in the sheet.
[0188]
The lever 1101 is provided with a lock mechanism (not shown) so as not to be switched unnecessarily. Further, the cam drive shaft may be moved by a plunge (not shown) instead of the lever 1101.
[0189]
41 is provided with five eccentric cams, five punches, and five dies because it can open two holes or three holes. By increasing the number of eccentric cams, punches and dies, more holes can be drilled into the sheet. Furthermore, the position of the hole can also be changed by changing the position of the eccentric cam attached to the cam drive shaft.
[0190]
Further, the diameters of the three-hole punch 1028 and the three-hole hole 1031 of the punch unit 1100 are the same as the diameters of the two-hole punch 1029 and the two-hole hole 1032, but may be different from each other.
[0191]
Therefore, the punch unit 1110 shown in FIG. 41 is not limited in the number of holes formed in the sheet and the positions where the holes are formed.
[0192]
The punch unit 1110 described above can also cope with different specifications of the number of holes formed in the sheet.
[0193]
  (The present inventionEmbodiment of punch unit)
  The punch unit 1200 shown in FIGS. 42A and 42B is also a reciprocating punch unit.
[0194]
In addition, the same code | symbol is attached | subjected about the same part as the punch unit 1040 shown in FIG. 37 thru | or FIG. 39, and the description is abbreviate | omitted.
[0195]
In this punch unit 1200, the cam member 1201 is moved by the stepping motor 1202 in the directions of the solid line and the broken line, and the three-hole cam 1203 and the two-hole cam 1204 are selectively moved to the three-hole punch 1028 and the two-hole punch. 1029. The stepping motor 1202 moves the cam member 1201 by a predetermined distance without slipping with respect to the cam member 1201 due to the engagement of the pinion 1205 and the rack 1206 of the cam member 1201.
[0196]
The three-hole cam 1203 is formed at the upper right in FIG. 42, and the two-hole cam 1204 is formed at the lower right. The cam member 1201 is formed with a standby surface 1207 so that the punches 1028 and 1029 are in a standby state apart from the holes 1031 and 1032 of the die.
[0197]
Three holes for three holes 1031 are formed on the die 1210 in a direction orthogonal to the sheet conveying direction to form a hole array for three holes 1211. Similarly, two two-hole holes 1032 are formed in the die 1210 side by side in a direction orthogonal to the sheet conveying direction to form a two-hole hole array 1212. The positions of the 3-hole hole array 1211 and the 2-hole hole array 1212 are shifted in the sheet conveying direction.
[0198]
A three-hole punch row 1213 and a two-hole punch row 1214 are formed to face the three-hole hole row 1211 and the two-hole hole row 1212.
[0199]
Further, a three-hole cam 1203 and a two-hole cam 1204 are formed on a common cam member 1201 so as to face the three-hole punch row 1213 and the two-hole punch row 1214.
[0200]
When the stepping motor 1202 rotates according to the number of pulses, the cam member 1201 moves from the standby position in FIG. 42 in the direction of the solid line arrow or the broken line arrow via the pinion 1205 and the rack 1206.
[0201]
When the cam member 1201 moves in the direction indicated by the solid line, the three-hole cam 1203 presses the three-hole punch 1028 against the return spring 1036 to open three holes in the sheet P. When the hole is made in the sheet P, the stepping 1202 moves the cam member 1201 in the direction of the broken line arrow so that the 3-hole punch 1028 does not interfere with the next sheet to be fed. When the end of the cam member 1201 is detected, the rotation is stopped. The cam member 1201 stops at a predetermined standby position.
[0202]
When the cam member 1201 moves in the direction of the broken line arrow, the two-hole cam 1204 presses the two-hole punch 1029 to make two holes in the sheet.
[0203]
Since the stepping motor 1202 always returns the cam member 1201 to the standby position and moves the cam member 1201 according to the number of pulses from that position, the cam member 1201 is reliably moved by a predetermined distance so that the hole is surely formed in the sheet. To be able to open.
[0204]
  The positions of the three-hole hole 1031 and the two-hole hole 1032 are shifted in the sheet conveyance direction, and therefore the stop position of the sheet when making a hole in the sheet is different. ,BreadHThis is performed by the unit controller 578 (see FIG. 35).
[0205]
42. Each of the three-hole punches 1028 in FIG. 42 is provided with a return spring 1036. However, as shown in FIGS. 43 (a) and 43 (b), the three-hole punches 1028 are connected by a connecting plate 1220. A return spring 1036 may be provided only at 1028, and the intermediate three-hole punch 1028 may be returned in conjunction with the movement of the three-hole punches 1028 on both sides. Alternatively, although not shown, a return spring 1036 may be provided on the intermediate three-hole punch 1028 so that the three-hole punches 1028 on both sides return in conjunction with the movement of the intermediate three-hole punch 1028.
[0206]
The die holes 1031 and 1032 are arranged in two rows as a three-hole hole row 1211 and a two-hole hole row 1212, but may be arranged in one row, although not shown. In this case, the punches 1028 and 1029 and the cams 1203 and 1304 are also arranged in one row.
[0207]
42, the die holes 1031 and 1032 are arranged in two rows as a three-hole hole row 1211 and a two-hole hole row 1212, and punches 1028 and 1029 and cams 1203 and 1304 are also arranged in two rows. The cams 1203 and 1304 arranged in two rows are formed on a common cam member 1201, but, as in the punch unit 1200 </ b> A shown in FIG. 44, the three-hole cam member 1221 formed with only the three-hole cam 1203. And a two-hole cam member 1222 in which only the two-hole cam 1204 is formed. In this case, the cam members 1221 and 1222 are individually moved via the pinion 1205 and the rack 1206 by the three-hole stepping motor 1223 and the two-hole stepping motor 1224, and the three-hole sensor 1225. The two-hole sensor 1226 is positioned at the standby position.
[0208]
When the punches 1028 and 1029 are arranged in one row, the three-hole cam member 1221 and the two-hole cam member 1222 are brought into close contact with each other so that the two cam members correspond to the one-row punches 1028 and 1029. Good.
[0209]
  42 to FIG.44.The punch units 1200 and 1200A shown in FIG. 2 are provided with five cams, five punches, and five holes because two holes or three holes can be drilled. By increasing the number of punch and die holes, a larger number of holes can be formed in the sheet. Further, by changing the positions of the holes of the cam, punch, and die, the positions of the holes opened in the sheet can also be changed. Further, the number of holes in the cam, punch, and die may be reduced so that one hole or a plurality of holes can be formed.
[0210]
Further, the diameters of the three-hole punch 1028 and the three-hole hole 1031 of the punch units 1200 and 1200A and the diameters of the two-hole punch 1029 and the two-hole hole 1032 are the same, but may be different from each other.
[0211]
Therefore, in the punch units 1200 and 1200A shown in FIGS. 42 to 44, the number of holes opened in the sheet and the positions of the holes opened in the sheet are not limited.
[0212]
The punch units 1200 and 1200A described above can also cope with different specifications for the number of holes formed in the sheet.
[0213]
  (otherPunch Unit of Embodiment) A punch unit 1300 shown in FIG. 45 is also a reciprocating punch unit.
[0214]
This punch unit 1300 uses the inclined guide grooves 1302 and 1303 in place of the cams 1203 and 1204 in the punch unit 1200 shown in FIG. 42A, and omits the return spring 1036 of the punches 1028 and 1029. The other structure is almost the same as the punch unit 1200 shown in FIG.
[0215]
Accordingly, the same parts as those of the punch unit 1200 shown in FIG.
[0216]
The punch unit 1300 moves the guide member 1301 by the stepping motor 1202 in the directions of the solid line and the broken line, and selectively selects the three-hole guide groove 1303 and the two-hole guide groove 1304 for the three-hole punch 1028 and the two-hole punch. The punch 1029 is brought into contact with the punch 1029.
[0217]
Each of the three-hole punch 1028 and the two-hole punch 1029 has a bearing 1308, and is engaged with the three-hole guide groove 1303 and the two-hole guide groove 1304 via the bearing 1308.
[0218]
The three-hole guide groove 1303 is formed at the upper right in FIG. 45, and the two-hole guide groove 1304 is formed at the lower right. The guide member 1301 is formed with a horizontal standby groove 1307 that holds the punches 1028 and 1029 away from the die holes 1031 and 1032 and holds the punch 1028 and 1029 at the standby position.
[0219]
The stepping motor 1202 moves the guide member 1301 by a predetermined distance without slipping with respect to the guide member 1301 due to the engagement of the pinion 1205 and the rack 1206 of the guide member 1301.
[0220]
The arrangement of the three-hole holes 1031 is the same as the arrangement shown in FIG. Therefore, the three-hole punch row 1213 and the two-hole punch row 1214 are the same as the punch unit 1200 shown in FIG.
[0221]
Further, the three-hole guide groove 1303 and the two-hole guide groove 1304 are formed corresponding to the three-hole punch row 1213 and the two-hole punch row 1214 and are formed on a common guide member 1301.
[0222]
When the stepping motor 1202 rotates according to the number of pulses, the guide member 1301 moves from the standby position in FIG. 45 in the direction of the solid line arrow or the broken line arrow via the pinion 1205 and the rack 1206.
[0223]
When the guide member 1301 moves in the direction of the solid arrow, the three-hole guide groove 1303 lowers the three-hole punch 1028 and opens three holes in the sheet P. When the hole is made in the sheet P, the stepping 1202 moves the guide member 1301 in the direction of the broken arrow so that the three-hole punch 1028 does not interfere with the next sheet to be fed. When the end of the guide member 1301 is detected, the rotation is stopped. The guide member 1301 stops at a predetermined standby position. At the same time, the 3-hole punch 1028 also stands by at the standby position by the standby groove 1307.
[0224]
When the guide member 1301 moves in the direction of the broken line arrow, the two-hole guide groove 1304 presses the two-hole punch 1029 to make two holes in the sheet.
[0225]
  The positions of the three-hole hole 1031 and the two-hole hole 1032 are shifted in the sheet conveyance direction, and therefore the stop position of the sheet when making a hole in the sheet is different. ,BreadHThis is performed by the unit controller 578 (see FIG. 35).
[0226]
The stepping motor 1202 always returns the guide member 1301 to the standby position and moves the guide member 1301 in accordance with the number of pulses from that position. To be able to open.
[0227]
  Note that the die holes 1031 and 1032 have a three-hole hole row 1211 and a two-hole hole row 1212.(FIG. 42 (a))Are arranged in two rows, but may be arranged in one row (not shown). In this case, the punches 1028 and 1029 and the guide grooves 1303 and 1304 are also arranged in one row.
[0228]
In FIG. 45, the die holes 1031 and 1032 are arranged in two rows as a three-hole hole row 1211 and a two-hole hole row 1212, and the punches 1028 and 1029 and the guide grooves 1303 and 1304 are also arranged in two rows. The guide grooves 1303 and 1304 arranged in two rows are formed in a common guide member 1301, but, for example, as shown in FIG. 44, the three holes in which only the three-hole guide grooves are formed as in the punch unit 1200A. The guide member may be separated into two pieces, that is, a two-hole guide member in which only a two-hole guide groove is formed. In this case, each guide member is individually moved via a pinion and a rack by a 3-hole stepping motor and a 2-hole stepping motor, and is standby by a 3-hole sensor and a 2-hole sensor. It is positioned at the position.
[0229]
Incidentally, the punch unit 1300 shown in FIG. 45 is provided with five guide grooves, five punches, and five holes since it can open two holes or three holes. By increasing the number of guide grooves, punches and die holes, a larger number of holes can be opened in the sheet. Further, by changing the positions of the guide grooves, punches and die holes, the positions of the holes opened in the sheet can also be changed. Furthermore, the number of guide grooves, punches, and die holes may be reduced so that one hole or a plurality of holes are formed.
[0230]
The diameters of the three-hole punch 1028 and the three-hole hole 1031 of the punch unit 1300 are the same as the diameters of the two-hole punch 1029 and the two-hole hole 1032, but may be different from each other.
[0231]
Therefore, in the punch unit 1300 shown in FIG. 45, the number of holes formed in the sheet and the positions of the holes formed in the sheet are not limited.
[0232]
The above punch unit 1300 can also cope with different specifications of the number of holes formed in the sheet.
[0233]
<Punch scrap disposal>
Punch scrap generated when a hole is made in the sheet by the punch 541 and the die 542 falls to the lower part in the casing 550 of FIG. 12 and is stored in the lower part of the casing 550 and rotated by the screw drive motor 571. 12 is collected by the left side of FIG. 12 by 570, discharged from the punch waste outlet 572 of the casing 550, and disposed below the punch waste outlet 572 and detachably attached to the rear part of the main body of the copier. Collected in a punch waste box 544 described later. The rotary shafts 559 and 560 of the punch 541 and the die 542 and the screw shaft 570 are disposed in parallel to each other.
[0234]
When the punch waste box 544 is removed from the copying machine in order to dispose of the punch waste accumulated in the punch waste box 544, the punch waste remaining in the casing is received by the screw shaft 570 and punch waste outlet 570. There is almost no fall.
[0235]
Note that the punch scraps are charged with static electricity and harden at the punch scrap discharge port 572, and may block the punch scrap discharge port 572. For this reason, as shown in FIG. 12, four blades 574 that forcibly discharge and drop punch scraps are provided radially at the end of the screw shaft 570 located at the punch scrap discharge port 572. Further, as shown in FIG. 14, a plurality of protrusions 575 facing upward and downward are formed in the punch waste discharge port 572 so that the punch waste is hardened and hardly adhered.
[0236]
In this manner, by providing the blades 574 and the protrusions 575, the punch scraps are firmly adhered to and adhered to the punch scrap discharge port 572 and the periphery thereof, and the punch scraps can be prevented from being discharged. Note that a plurality of protrusions may be provided instead of the protrusion 575.
[0237]
As shown in FIG. 32, the punch scrap box 544 is detachably provided on the rear surface of the finisher 600 by a magnet (not shown).
[0238]
In addition, as shown in FIG. 11, an inclined inverted V-shaped dispersion plate 576 for dispersing punch waste falling from the punch waste receiving port 573 is provided in the punch waste box 544. The punch scraps that have fallen from the punch scrap receiving port 573 are dispersed in the left-right direction in FIG. 11 by the dispersion plate 576 and accumulated in the punch scrap box 544.
[0239]
Without the dispersion plate 576, the punch scraps accumulate in the shape of a mountain directly under the punch scrap receiving port 573, and the punch scrap detection sensor 545 is operated while the punch scraps do not become full in the punch scrap box 544. And could be misreported as full.
[0240]
However, when the dispersion plate 576 is provided, the punch scraps are dispersed in the punch scrap box 544 and accumulated on average, so that the punch scraps can be stored by fully utilizing the space in the punch scrap box 544. .
[0241]
The dispersion plate 576 shown in FIG. 11 can disperse punch scraps only in the left and right directions in FIG. 11. However, when the dispersion plate 576 is inclined in three directions like the dispersion plate 577 shown in FIG. It is possible to more reliably disperse punch scraps in the three directions indicated by the arrows.
[0242]
Also, when the punch waste box 544 detects that the punch waste box 544 is full of punch waste and the user removes the punch waste box 544 from the rear surface of the finisher 600 to discard the punch waste, The punch unit controller 578 operates the sample tray elevating motor 714 and the stack tray elevating motor 702 (see FIG. 26) by the operation of the dust detection sensor 545 to bring the sample tray 701 to the highest position and move the stack tray 700 to the highest position. By moving to the lowest position, the visibility and operability of the punch waste box 544 are improved.
[0243]
When the punch waste box 544 is removed, the punch waste box detection sensor 582 provided in the copying machine 1000 (see FIG. 32) is activated, and the punch unit controller 578 (see FIGS. 2 and 20) In order to prevent dust from being scattered, the drive motor 571 of the screw 543 (see FIG. 12) is stopped, the operation of the punch unit 508 is allowed to be a predetermined number (for example, 100 sheets) accumulated in the casing 550, and then stopped. Yes. In this case, the other mechanisms continue to operate and, unlike the conventional case, can be used continuously without stopping the entire copying machine 1000 including the punching operation. The copying operation efficiency of the copying machine 1000 can be improved without stopping the operation.
[0244]
The punch units 508, 1040, 1100, 1200, 1200a, and 1300 described above are operated by the punch unit controller 578 shown in FIGS. 2, 20, and 35.
[0245]
(Finisher 600 stapler unit 800)
In FIG. 25, a stapler unit 800 is a unit that aligns and binds sheets.
[0246]
In FIG. 10, a sheet that has been punched by the punch unit 508 or a sheet that has not been drilled by passing through the punch unit 508 is sequentially stacked on the buffer roller 505 and wound around three sheets. The three sheets are wound around the buffer roller 505 because, when a stapler 601 described later is binding a bundle of sheets stacked on the intermediate tray 630, the sheets are not sequentially fed to the intermediate tray 630. This is because the incoming sheet is retracted to the buffer roller 505.
[0247]
The sheets are guided on a sort path 522 and are sent out onto the intermediate tray 630 by a pair of conveying rollers 507.
[0248]
In FIG. 25, a knurled belt 602 that is elastically deformable and made of rubber or resin and has a larger diameter than the lower conveyance roller 507b is interposed between the upper conveyance roller 507a and the lower conveyance roller 507b. Is pinched. The sheet is sandwiched between the knurled belt 602 and the upper conveying roller 507 a and is discharged onto the intermediate tray 630.
[0249]
A distance L between the surface of the knurled belt 602 that is in contact with the upper conveying roller 507a and the rotation center 507c of the lower conveying roller 507b is calculated from the conveying speed of the sheet when the sheet is fed from the conveying roller pair 507, The calculated value is set slightly longer (for example, approximately 10% based on the experimental result). As a result, the sheet P is sent out so as to fly onto the intermediate tray 630 at a target conveyance speed as indicated by a two-dot chain line, and reaches a predetermined position on the intermediate tray 630.
[0250]
Note that the radius of the knurled belt 602 is set to a design value, and the rotational speed of the roller driving motor 534 for rotating the lower conveying roller 507b is not shown or provided between the roller driving motor 534 and the lower conveying roller 507b. The rotation transmission ratio of the rotational force transmission gear train may be set so that the peripheral speed of the lower conveyance roller 507b is faster than the calculated value, and the lower conveyance roller 507b may be rotated.
[0251]
The rear end of the intermediate tray 630 (on the right side in FIG. 25, the side close to the two-fold processing unit 500) is lower than the front end. For this reason, the sheet P discharged to the intermediate tray 630 moves backward as indicated by the solid line and is received by the sheet receiving piece 515. When a certain number of sheets P are stacked on the intermediate tray 630, the sheets become a bundle of sheets whose rear ends are aligned, and the lower part of the knurled belt 602 interferes with the retreating sheet. For this reason, the roll belt 602 is pulled to the upstream side in the sheet conveyance direction by the displacement roller 516 whose position changes, and is deformed flat as indicated by a two-dot chain line.
[0252]
While a predetermined number of sheets are stacked on the intermediate tray 630, a pair of alignment plates 517 (one is not shown) that aligns the width of the sheets from both sides in the sheet width direction is repeatedly moved closer to and away from the sheets. Then, sheet width alignment is performed.
[0253]
When a predetermined number of sheets are stacked on the intermediate tray 630, the sheet receiving piece 515 descends as shown by a two-dot chain line, the stapler 601 approaches the anvil 519, and the stapler 601 and the anvil 519 sandwich the sheet bundle. Then, staple with staple 520.
[0254]
The sheet bundle bound by the staple is a knurled belt 602 that has been released from the pulling of the displacement roller 516 and returned to the original circular shape, and a pair of discharge rollers 680 (680a, 680b) in which one discharge roller 680a approaches and lowers the intermediate tray 630. ) To the stack tray 700 or the sample tray 701.
[0255]
When the sheet bundle is discharged from the intermediate tray 630, the discharge roller 680a tilts upward to the position of the solid line in the direction away from the intermediate tray 630, and the sheet receiving piece 515 also tilts upward to the position of the solid line, and is then discharged. It will be in a standby state so that a coming sheet can be received.
[0256]
(Sample tray 701 and stack tray 700 of finisher 600)
10, 26, and 27, the two trays 701 and 700 are properly used depending on the situation, and the lower stack tray 700 is selected when receiving copy output, image forming unit output, and the like. The sample tray 701 is selected when receiving copy sample output, interrupt output, stack tray overflow output, function sorting output, job mixed output, and the like.
[0257]
Each of the two trays 701 and 700 has a sample tray lifting motor 714 and a stack tray lifting motor 702 (see FIG. 26) so that both can independently run in the vertical direction. 750 is attached to a rack 710 that also serves as a roller receiver attached in the vertical direction. In addition, the backlash in the front and back direction of the trays 700 and 701 is restricted by the restriction member 715.
[0258]
Further, the stack tray 700 and the sample tray 701 are movable in the vertical direction along a position regulating member 600a (see FIG. 10) that is a wall plate on the tray side of the finisher 600 and is disposed in the vertical direction. Yes.
[0259]
In the tray moving mechanism, a sample tray lifting / lowering motor 714 is attached to the frame 711 of the sample tray 701, and a pulley press-fitted onto the motor shaft transmits a driving force to the pulley 703 via the timing belt 712. A shaft 713 connected to the pulley 703 with a parallel pin transmits drive to a ratchet 705 that is also connected to the shaft 713 with a parallel pin, and the ratchet 705 biases the idler gear 704 with a spring 706.
[0260]
The ratchet 705 is connected to the idler gear 704 to transmit the drive, and the idler gear 704 is engaged with one of the gears 707 so that the driving force is transmitted to the rack 710 both on the front side and the rear side through the shaft 708. Two gears 707 are attached. The gear 707 can move along the rack 710 via the gear 709. Two rollers 714 on one side of the tray support are housed in a roller receiver that also serves as a rack 710.
[0261]
Further, when the tray is lowered, the spring 706 of the ratchet 705 is pushed and rotated only in the direction in which the tray is lifted so that the tray drive system is not damaged with the foreign matter interposed therebetween. When the ratchet 705 is idling, an idling detection sensor S701 for immediately stopping the driving of the ratchet 705 detects a slit incorporated in the idler gear 704. The idling detection sensor S701 is also used for step-out detection in normal times.
[0262]
The stack tray 700 also has a frame 716, and the frame 716 has a moving mechanism similar to that of the sample tray 701.
[0263]
An area detection sensor S703 is provided on the sample tray 701, and is an area flag fixed to the finisher frame 750 in the vicinity of the upper surface of the sample tray 701 at the highest position slightly below the upper limit sensor S704 that stops the sample tray 701 from rising too much. A range from F703a to area flag F703d is detected.
[0264]
The area detection sensor S702 is provided on the stack tray 700 and detects an area from the area flag F702a to the area flag F702d fixed to the frame 750 of the finisher.
[0265]
The point sensor S707 is fixed to the finisher frame 750. When the sample tray 701 stacks about 1,000 sheets discharged from the intermediate tray 630 regardless of the sheet size, the area provided in the sample tray 701 is provided. The operation is performed by a flag F707.
[0266]
The point sensor S707 is also activated by an area flag F706 provided on the stack tray 700 when about 1000 sheets are stacked on the stack tray 700 when the size of the sheets discharged from the intermediate tray 630 is a large size. It has become.
[0267]
The area flag F703b is provided at a position where about 1000 sheets are stacked on the sample tray 701 from the area flag F703a for non-sort paper surface detection. In cooperation with the area detection sensor S703, the sheet on the sample tray 701 is provided. The load capacity is limited by the height.
[0268]
In addition, the area flag F703b is provided slightly above the sheet discharge port 618 of the intermediate tray 630, and cooperates with the area detection sensor S703 at the upper limit position of the area that obstructs the sheets discharged from the intermediate tray 630. It is to inform you that there is.
[0269]
The area flag F703c cooperates with the area detection sensor S703 to notify that it is the lower limit position of the area that hinders the sheet discharged from the intermediate tray 630.
[0270]
The area flag F703d is a flag that limits the height of the sample tray 701 when the sample tray 701 receives a sheet from the intermediate tray 630 in cooperation with the area detection sensor S703, and is approximately 1000 sheets below the area flag F703c. It is provided in the position.
[0271]
The area flag F702a is a flag that, in cooperation with the area detection sensor S702, reports the upper limit of the raising / lowering area of the stack tray 700 when the stack tray 700 receives a sheet from the intermediate tray 630.
[0272]
The area flag F702b is provided at a position where about 1000 sheets can be stacked on the stack tray 700 below the position detection sensor S702a.
[0273]
The area flag F702c is provided at a position where about 2000 sheets can be stacked on the stack tray 700 below the position detection sensor S702a.
[0274]
The area flag F702d is a flag that reports the lower limit of the raising / lowering area of the stack tray 700 in cooperation with the area detection sensor S702.
[0275]
As shown in FIGS. 1 and 10, each of the sample tray 701, the stack tray 700, and the discharge tray 211 has discharge sheet detection sensors 586 and 585 that detect whether or not sheets are stacked on each tray. , 584, and the stack tray 700 is further provided with a discharge sheet detection sensor 583 as shown in FIG.
[0276]
(Flowchart of sample tray 701 and stack tray 700)
Next, the raising / lowering operation of the sample tray 701 and the stack tray 700 will be described with reference to the flowcharts of FIGS. 28, 29, and 30. FIG.
[0277]
The raising / lowering operation is performed by a finisher control unit 525 (see FIGS. 2 and 35) described later.
[0278]
Further, the area from the area flag F703a to the area flag F703b is referred to as area 1, the area flag F703b to the area flag F703c as area 2, the area flag F702a to the area flag F702c as area 3, and the area flag F702c to Area 4 is defined up to area flag F702d.
[0279]
<Discharge of sheet to discharge tray 211>
First, when stacking sheets on the discharge tray 211 (section (abbreviated as S) 1), whether or not the sample tray 701 is in the area 4, that is, whether or not the sample tray 701 is out of the moving range. Detection is performed by the point sensor 706 and the area flag F706, and whether the stack tray 700 is in the area 4 is detected by the area flag F702d and the area detection sensor S702 (S2).
[0280]
When the sample tray 701 and the stack tray 700 are not in the area 4, the sheet is discharged to the discharge tray. The discharge operation is repeated until a predetermined number of sheets are discharged (S4). When the predetermined number of sheets are discharged, the discharge operation to the discharge tray 211 is completed (S5).
[0281]
If the sample tray 701 and the stack tray 700 are in the area 4, both trays 701 and 700 are raised to the area flags F703a and F702a by the lift motors 714 and 702 (see FIG. 26) (S6, S7).
[0282]
When the stack tray 700 is no longer in the area 4, the process proceeds to S3, and the sheet is discharged onto the discharge tray 211 (S3).
[0283]
If the stack tray 700 is in the area 4, the sheets are stacked on the stack tray 700, and the user is instructed to remove the sheets on the stack tray (S9).
[0284]
When the discharged sheet detection sensor 585 (see FIGS. 1, 10, and 35) on the stack tray detects that the sheets on the stack tray 700 have been removed (S10), the stack tray is raised to the area flag 702a ( After S11), the sheets are stacked and discharged on the discharge tray 211 (S3).
[0285]
<Discharge of Sheet to Sample Tray 701>
When a sheet is discharged from the sheet discharge port 619 to the sample tray 701 (S1, S20, S21), the sample tray 701 descends as the sheet is discharged while receiving the sheet. When the sample tray 701 is lowered to the area 2 (S22), the sample tray 701 blocks the sheet discharge port 618 of the intermediate tray 630, and the sheet bundle cannot be discharged from the intermediate tray 630 onto the stack tray 700. The user is instructed to remove the sheet on the tray (S23), and after the sheet is removed from the sample tray (S24), the sample tray is raised to the area flag F703a (S25). Then, the sheet can be discharged again to the sample tray.
[0286]
When the discharge of the sheet is completed while the sample tray 701 is being lowered to the area 2, the sample tray 701 is stopped on the spot and the sheet discharge process is completed (S26, S27).
[0287]
<Discharge of large size sheet onto stack tray 700>
The stapled sheets are mainly discharged from the intermediate tray 630 to the stack tray 700.
[0288]
When discharging a sheet to the stack tray 700 (S1, S20), if the sheet is a large size (for example, A3, B4 size) according to a user instruction (S30), the stack is placed in order to stack the large size sheet on the stack tray. The tray is lowered to the point sensor S707 (S31, S32). When the discharge of the large size sheet is completed during the lowering, the sample tray is stopped (S33, S34).
[0289]
When the stack tray 700 is lowered to the point sensor S707, about 1000 large sizes are loaded. At this time, it is detected by the discharged sheet detection sensor 584 (see FIGS. 1, 10, and 35) on the discharge tray 211 that sheets are stacked on the discharge tray 211 (S35), so that the user can remove the sheets. (S36). If there is no sheet in the discharge tray 211, the stack tray 700 is lowered to the area flag F702d (S37).
[0290]
Thereafter, the sample tray 701 is lowered to the area flag F703c (S38), and sheets are stacked on the sample tray 701 (S39). Further, the sample tray 701 is lowered to the point sensor S707 while discharging the large size sheet (S40). If the discharge of the large size sheet is completed during the lowering, the sample tray is stopped at that time (S41, S42).
[0291]
When the sample tray is lowered to the point sensor S707 and a large size sheet is stacked on the stack tray 700 (S43), the user is instructed to remove the stack tray sheet (S44).
[0292]
Thereafter, the sample tray and the stack tray are raised to the area flags F703a and F702a (S45, S46).
[0293]
However, when sheets are stacked on the sample tray 701, the sample tray 70 does not rise in the area 3, and therefore neither of the trays rises. For this reason, the user is allowed to remove the sheet (S47, S48).
[0294]
<Discharge of normal size sheet to stack tray 700>
When the sheets are discharged to the stack tray 700 (S1, S20), if the sheet is a normal size (for example, A4, B5 size) (S30) according to the user's instruction, the stack is placed to load the normal size sheet on the stack tray. The tray is lowered to area 4 (S51, S52). When the discharge of the normal size sheet is completed during the lowering, the stack tray stops (S53, S54).
[0295]
When the stack tray 700 is lowered to the lower area of the area 3, about 2000 sheets of normal size are stacked. At this time, if the discharged sheet detection sensor 584 detects that the sheets are stacked on the discharge tray 211 (S35), the user is instructed to remove the sheets (S36). If there is no sheet in the discharge tray 211, the stack tray 700 is lowered to the area flag F702d (S37). As a result, 3000 sheets are stacked on the stack tray 700.
[0296]
Thereafter, the sample tray 701 is lowered to the area flag F703c (S38), and sheets are stacked on the sample tray 701 (S39). Further, the sample tray 701 is lowered to the point sensor S707 while discharging the normal size sheet (S40). If the discharge of the normal size sheet is completed during the lowering, the sample tray is stopped at that time (S41, S42).
[0297]
When the sample tray is lowered to the point sensor S707 and normal size sheets are stacked on the stack tray 700 (S43), the user is instructed to remove the stack tray sheets (S44).
[0298]
Thereafter, the sample tray and the stack tray are raised to the area flags F703a and F702a (S45, S46).
[0299]
However, when sheets are stacked on the sample tray 701, the sample tray 700 does not rise in the area 3, and therefore neither of the trays rises. For this reason, the user is allowed to remove the sheet (S47, S48).
[0300]
<Number of sheets stacked between sample tray and stack tray>
In the above raising and lowering of the sample tray 701, when the sample tray 701 is lowered to the area flag F703b, about 1000 normal size sheets can be stacked, and when the sample tray 701 is lowered to the area flag F703c, about 2000 normal size sheets can be stacked. About 1000 large-size sheets can be stacked, and when the area flag F703d is lowered, about 3000 normal-size sheets can be stacked. Further, when the sample tray 701 is lowered to the area flag F703d, about 1000 sheets of bound sheets discharged from the intermediate tray 630 can be stacked.
[0301]
When the stack tray 700 is lowered to the area flag F702b, about 1000 sheets of ordinary size sheets that are bound can be stacked. When the stack tray 700 is lowered to the area flag F702c, about 2000 sheets of ordinary size sheets that are bound can be stacked. About 1000 size sheets can be stacked, and when the area flag is lowered to the area flag F702d, about 3000 bound normal size sheets can be stacked.
[0302]
Therefore, when the sample tray 701 is lowered to the area flag F703b and the stack tray is lowered to the area flag F702c, about 3000 sheets can be conveniently stacked on the tray.
[0303]
When the sample tray 701 is lowered to the area flag F703d and the stack tray is lowered to the area flag F702d, approximately 3000 sheets of bound sheets can be stacked on the tray.
[0304]
When the area flag F702d is lowered, about 3000 normal size sheets can be stacked on the stack tray 700.
[0305]
Note that the position of the sample tray 701 and the stack tray 700 is detected by sensors, flags, and the like so that the trays 701, 700, and 211 do not interfere with each other and are controlled by the finisher control unit 525 or the like.
[0306]
<Opening / closing of sheet discharge port 611 of discharge tray 211>
As shown in FIGS. 1, 31, and 32, in the above operation, when the stack tray 700 is lowered, the sheet discharge port 611 of the discharge tray 211 is closed by the shutter 613, and the stack tray 700 is placed in the sheet discharge port 611. A large number of sheets can be stacked on the stack tray 700 so that the upper sheet does not enter.
[0307]
The shutter 613 is provided so as to be movable up and down by a pair of guide plates 614 and 614 provided on the inner side of the outer wall 612, and is normally pulled upward by tension springs 615 and 615 to open the sheet discharge port 611.
[0308]
When the stack tray 700 is lowered, the lower end of the stack tray comes into contact with a tray receiver 616 formed by bending outward at the lower end of the shutter 613, and the shutter 613 resists the tension springs 615 and 615. Then, the stack tray 700 is lowered together.
[0309]
When the stack tray 700 rises, the shutter 613 is pulled by the tension springs 615 and 615 and rises following the stack tray 700 to open the sheet discharge port 611.
[0310]
When the stack tray 700 is lowered and the shutter 613 closes the sheet discharge port 611, if the discharge tray 211 protrudes from the sheet discharge port 611, the stack tray 700 is prevented from being lowered. For this reason, the discharge tray 211 is moved to the home position (position of FIG. 1) by the discharge tray moving motor 617 shown in FIG.
[0311]
<Operation of Sample Tray 701 and Subtray 620>
When stacking unfolded tri-fold sheets on the stack tray 700, the folded portion is positioned on the leading end side of the stack tray 700, so that the folded portion rises and the subsequent tri-fold sheets may not be easily discharged.
[0312]
Therefore, as shown in FIG. 33, the sub-tray 620 provided on the base side of the stack tray 700 is raised, and the unfolded side of the sheet is lifted to bring the tri-fold sheet as close to horizontal as possible. Then, as the sub-tray 620 is raised, the entire stack tray 700 is lowered to make it easier to discharge the sheet.
[0313]
When the half-folding mode of the sub-tray 620 is selected by the operation unit 303, the finisher control unit 525 (see FIGS. 2 and 35) operates the plunger 621 (see FIG. 33) to operate the sub-tray 620 with the rack 622 and the pinion 623. Is moved up and down (the lifting operation may be performed by a link mechanism).
[0314]
In this case, the sub-tray 620 may be tilted up and down by a counter (not shown) that counts tri-fold sheets without being detected by the discharge sheet detection sensor 583.
[0315]
The sub-tray 620 is configured such that the base side (upstream end side in the sheet discharge direction) of the stack tray 700 tilts in the vertical direction with the upper middle position of the stack tray 700 as a base end.
[0316]
Further, when a non-folded sheet (small size sheet is referred to as “straight sheet”) and a tri-fold sheet are mixedly loaded in the unstacked mode on the stack tray 700, the ratio of the tri-fold sheet to the straight sheet (“mixed ratio”). Is less than a predetermined value, for example, when the mixed loading ratio of five folded sheets to 95 straight sheets is less than 5%, the folded portion of the sheet is less raised and the sub-tray 620 If it is raised, the root side of the stack tray 700 of the sheet becomes higher, and if the straight sheet is a lower curled sheet (a sheet curled in an inverted U shape), there is a possibility that it will slide off from the front end side of the stack tray 700.
[0317]
In such a case, when discharging to the stacking tray, the sub-tray 620 is lowered as shown in FIG. 34 to lower the root side of the stack tray so that the uppermost sheet is always almost horizontal or the stack tray Make the root side low.
[0318]
As a result, the front end side of the stack tray of the sheet is raised, and even if the sheet is a lower curled sheet, it does not slide down from the front end side of the stack tray.
[0319]
The tilting up and down of the sub-tray 620 is automatically performed on the finisher control unit 525 (see FIGS. 2 and 35) based on the mixed loading ratio of the unfolded sheet and the tri-fold sheet stored in advance.
[0320]
That is, the mixed loading ratio based on the number of unfolded sheets and the number of tri-fold sheets input by the user selecting the unbinding mode with the operation unit 303 (see FIG. 2) and the finisher control unit 525 are input in advance. The finisher control unit 525 compares the mixed loading ratio, and when the pre-mixed mixing ratio is smaller (for example, when it exceeds 5%), the sub-tray 620 is in the lowered position and is larger (for example, 5). %), It is in the raised position.
[0321]
Note that the sub-tray 620 may be tilted up in advance and lowered according to the mixed loading ratio regardless of the number of sheets when the tri-fold sheet is ejected, or may be lowered in advance and then adjusted to the mixed loading ratio. You may raise it accordingly.
[0322]
Further, not only the stack tray 700 but also the sample tray 701 may be provided with a sub-tray so as to correspond to a mixed sheet.
[0323]
Further, when the sub-tray 620 is not provided in the sample tray 701, when the tri-fold sheet is discharged, the sheet discharge port 619 ( When the sheet discharge speed by the discharge roller pair 509 from the discharge roller pair 509 is low, even if the leading edge of the sheet comes out from the sheet discharge port 619, it does not move forward but stays in one place, and the sheet is discharged from the sheet discharge port 619. May become incomplete. On the other hand, if the sheet discharge speed by the discharge roller pair 509 is too high, there is a possibility that the sample tray 701 may jump out of the sample tray 701 and fall. For this reason, when the user instructs the operation unit 303 (see FIG. 2) to input a tri-fold of a thin sheet, a finisher control unit 525 (see FIG. 35) described later rotates the discharge roller pair 509. The rotational speed of the motor 523 for the discharge roller pair is controlled so that it can be discharged at a speed optimal for a thin tri-fold sheet.
[0324]
As a result, even when a sheet having a thin thickness and a low waist is folded into three, the sheet can be reliably discharged and stacked.
[0325]
(Finisher control unit 525)
In FIG. 35, the finisher control unit 525 is a control circuit that controls the finisher 600.
[0326]
The finisher control unit 525 includes a CPU circuit unit 529 including a CPU 526, a ROM 527, a RAM 528, and the like. The CPU circuit unit 529 communicates with the CPU circuit unit 301 provided on the copying apparatus main body side via the communication IC 530 to perform data conversion, and based on instructions from the CPU circuit unit 529, various programs stored in the ROM 527 To control the drive of the finisher 600.
[0327]
When the drive control of the finisher 600 is performed, detection signals from various sensors are input to the CPU circuit unit 529. As various sensors, there are an idling detection sensor S701, an area detection sensor S702, an area detection sensor S703, an upper limit sensor S704, a point sensor S706, a point sensor S707, and the like.
[0328]
A driver 531 is connected to the CPU circuit unit 529, and the driver 531 drives various motors and solenoids based on signals from the CPU circuit unit 529.
[0329]
Examples of the various motors include a discharge roller pair motor 523, a discharge roller pair motor 524, a moving motor 617, a sample tray lifting motor 714, a stack tray lifting motor 702, and the like. As the solenoid, there is a sub-tray plunger 621 or the like.
[0330]
【The invention's effect】
The sheet punching apparatus of the present invention includes a plurality of punch rows formed by arranging a plurality of punches in a direction parallel to the rotation axis on the rotation shaft, and a plurality of rows in the rotation direction of the rotation shaft, and punch holes in the die. Therefore, if the number of punches for each of the plurality of punch rows is the same and the punch positions are the same in the rotation direction of the rotary shaft, the number of punches and dies are the same as the number of punch rows. As the number of combinations increases, the wear of the punch and the die is slowed accordingly, so that it is not necessary to frequently replace the punch and the die as compared with the conventional case, and the punching efficiency for the sheet can be improved.
[0331]
Also, if the number of punches in the punch row is made different for each punch row, even if the number of holes opened in the sheet is changed, the number of holes opened in the sheet can be changed by the number of punch rows. Therefore, it is not necessary to replace the punch and die, and the perforation efficiency can be increased accordingly.
[0332]
In the sheet punching device of the present invention, the punches in the punch row are selectively advanced by the eccentric cam in which the punches of the punch row are grouped into the holes of the die so as to make holes in the sheet. The number of holes drilled in the sheet can be easily changed by changing the number of selections, and the number of combinations of punch and die holes is increased by the number of groups, and the wear of punch and die holes is slowed accordingly. Compared with the prior art, it is not necessary to frequently replace the punch and die, and the punching efficiency for the sheet can be increased.
[0333]
In the sheet punching device of the present invention, the rotation drive shaft is moved and the punch operated by the eccentric cam is selected, so the number of holes drilled in the sheet can be easily changed, and the rotation drive The number of combinations of punches and die holes increases by the number selected by the eccentric cam as the shaft is switched, and the wear of the punch and die holes is reduced by that amount. Therefore, it is not necessary to replace the die, and the punching efficiency for the sheet can be increased.
[0334]
The sheet punching device of the present invention can easily change the number of holes drilled in the sheet by selecting the moving direction of the cam member, and the number of combinations of punches and die holes increases. As a result, the wear of the hole of the die is delayed, and it is not necessary to frequently replace the punch and the die as compared with the conventional case, and the punching efficiency for the sheet can be increased.
[0335]
In the sheet punching device of the present invention, the number of holes drilled in the sheet can be easily changed by selecting the cam member, and the number of combinations of punch and die is increased. The wear of the hole is delayed, and it is not necessary to frequently replace the punch and the die as compared with the conventional case, and the punching efficiency for the sheet can be increased.
[0336]
The sheet punching device of the present invention can easily change the number of holes drilled in the sheet by selecting the moving direction of the guide member, and the number of combinations of punches and die holes increases. As a result, the wear of the hole of the die is delayed, and it is not necessary to frequently replace the punch and the die as compared with the conventional case, and the punching efficiency for the sheet can be increased.
[0337]
In the sheet punching device of the present invention, the number of holes drilled in the sheet can be easily changed by selecting the guide member, and the number of combinations of punch and die is increased. The wear of the hole is delayed, and it is not necessary to frequently replace the punch and the die as compared with the conventional case, and the punching efficiency for the sheet can be increased.
[0338]
The image forming apparatus of the present invention includes the above-described sheet punching device having high punching efficiency. Accordingly, the sheet can be fed to the sheet punching device at a higher speed for forming an image on the sheet. The image processing efficiency for the sheet can be increased and the productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic front sectional view of a copying machine as an image forming apparatus according to an embodiment of the present invention.
FIG. 2 is a control block diagram of the entire copying machine.
FIG. 3 is a diagram for explaining the operation of a trifold processing unit.
(A) It is a state figure just before folding a sheet into two.
(B) It is a state figure when the sheet is folded in two.
FIG. 4 is a diagram for explaining the operation of a trifold processing unit.
(A) It is a state figure just before folding a sheet into three.
(B) is a state diagram when starting to fold a sheet in three.
(C) is a state diagram when a sheet is folded in three and discharged.
FIG. 5 is a control block diagram of a tri-fold processing unit.
FIG. 6 is a view of a roller according to another embodiment of a tri-fold processing unit.
FIG. 7 is a perspective view of a roller according to another embodiment of a three-fold processing unit.
FIG. 8 is a perspective view of a roller according to another embodiment of a three-fold processing unit.
FIG. 9 is a perspective view of a roller according to another embodiment of a three-fold processing unit.
FIG. 10 is a schematic front view of a two-fold processing unit and a finisher.
FIG. 11Reference exampleIt is a front view of a punch unit.
12 is a view of the punch unit of FIG. 11 as viewed from the left side.
FIG. 13 is a partially cutaway view of the vicinity of a punch waste outlet of the punch unit.
14 is a view taken in the direction of arrows 14-14 in FIG.
FIG. 15 is a schematic plan view of a punch and a die of a punch unit.
FIG. 16 is a diagram for explaining operations of the punch and the die in the punch unit, and is a diagram before drilling.
FIG. 17 is a diagram for explaining operations of a punch and a die in the punch unit, and is a diagram during a punching operation.
FIG. 18 is a diagram for explaining the operation of the punch and die in the punch unit, and is a diagram of completion of drilling.
FIG. 19 is a view for explaining the attachment position of the sheet position formation guide plate in the punch unit.
FIG. 20 is a control block diagram of the punch unit.
FIG. 21 shows another punch unit.Reference exampleFIG.
[Fig. 22] Other punch unitReference exampleIt is a schematic plan view of the punch and die.
FIG. 23 is a perspective view of the punch of FIG.
FIG. 24 is a perspective view of a dispersion plate in the punch unit.
FIG. 25 is a schematic front view of a stapler unit.
FIG. 26 is a schematic plan view of a finisher.
FIG. 27 is an explanatory view of the raising and lowering operation of the sample tray and the stack tray.
FIG. 28 is a flowchart for explaining an elevating operation of the sample tray and the stack tray.
FIG. 29 is a flowchart for explaining an elevating operation of a sample tray and a stack tray.
FIG. 30 is a flowchart for explaining an elevating operation of a sample tray and a stack tray.
FIG. 31 is a perspective view of a finisher.
FIG. 32 is a schematic view of the vicinity of a sheet discharge port of the finisher.
FIG. 33 is a diagram illustrating a mixed loading state of a tri-fold sheet and an unfolded sheet on the stack tray, and is a diagram in which many tri-fold sheets are stacked.
FIG. 34 is a diagram illustrating a mixed state of tri-fold sheets and unfolded sheets on the stack tray, and is a diagram in which a small number of tri-fold sheets are stacked.
FIG. 35 is a control block diagram of the finisher.
FIG. 36Reference exampleIt is a schematic perspective view of this punch unit.
FIG. 37 is still anotherReference exampleFIG. 5 is a view of the punch unit as viewed from the sheet conveying direction, and is partially shown in cross section.
38 is a view of the main part of the punch unit as viewed from the direction orthogonal to the cam drive shaft (rotation drive shaft) of the punch unit of FIG. 37, and is partially shown in cross section.
39 is a perspective view of a main part of the punch unit of FIG. 37. FIG.
40 is a perspective view of the punch unit shown in FIG. 37 when the eccentric cam and the punch are connected by a swing connecting member.
FIG. 41The present inventionIt is the figure which looked at the punch unit of this embodiment from the conveyance direction of a sheet.
FIG. 42otherIt is a figure of the punch unit of embodiment.
(A) It is the figure which looked at the punch unit from the conveyance direction of a sheet | seat, and is partially represented with the cross section.
(B) It is the figure which showed the arrangement | sequence state of the hole of die | dye.
43 is a view of a modification of the punch unit of FIG. 42. FIG.
(A) It is the figure which looked at the punch unit from the conveyance direction of a sheet | seat, and is partially represented with the cross section.
(B) It is the figure which showed the arrangement | sequence state of the hole of die | dye.
44 is a view of a modified example of the punch unit of FIG. 42, as seen from the sheet conveying direction, and is partially shown in cross section.
FIG. 45otherIt is the figure which looked at the punch unit of this embodiment from the conveyance direction of a sheet.
[Explanation of symbols]
P sheet
100 Document feeder
111 Photosensitive drum (image forming means)
114 cassette (sheet stacking means)
115 cassette (sheet stacking means)
200 Image reader
300 Image forming unit
400 Trifold processing part
500 Folding processing part
508, 1040, 1100, 1200, 1200A, 1300
Punch unit (sheet punching device)
541, 1028, 1029 Punch
541A, 541B, 1034 Punch row
542,581,1030 die
546, 1031, 1032 Die holes
557a, 557b Guide plate
559,580 Punch rotation axis
600 Finisher
900 Inserter
1000 Copying machine (image forming device)
1010, 1110 Cam drive shaft (rotary drive shaft)
1025, 1026 Eccentric cam
1033 Die hole array
1201 Cam member
1203 3-hole cam
1202 Stepping motor
1204 Two-hole cam
1210 die
1215 sensor
1221 Three-hole cam member
1222 Cam member for 2 holes
1223 Stepping motor for 3 holes
1224 Stepping motor for 2 holes
1225 3-hole sensor
1226 2-hole sensor
1301 Guide member
1303 Three-hole guide groove
1304 Two-hole guide groove

Claims (12)

In the sheet drilling device that drills holes in the sheet while allowing punches to enter the holes in the die,
At least one hole row of the die formed by arranging a plurality of holes of the die divided into a plurality of groups ;
The same number of punch rows as the hole rows formed by arranging a plurality of punches corresponding to the group of hole rows,
A cam member disposed in a plurality of positions corresponding to the plurality of groups along the punch row so as to be reciprocally movable, and having a plurality of cams corresponding to the punches of the punch row,
A sheet punching device, wherein the cam moves a punch of a group corresponding to a selected movement position among the plurality of movement positions, and causes the punch to enter a hole of a hole row of the die. In the sheet drilling device that drills holes in the sheet while allowing punches to enter the holes in the die,
At least one hole row of the die formed by arranging a plurality of holes of the die divided into a plurality of groups ;
The same number of punch rows as the hole rows formed by arranging a plurality of punches corresponding to the group of hole rows,
A plurality of cam members arranged in a movable manner along the punch row and having a plurality of cams corresponding to each group of the punch row,
Along with the movement of the selected cam member among the plurality of cam members, the punch of the group corresponding to the cam of the cam member is moved to enter the hole of the hole array of the die. Sheet punching device. 3. The sheet punching device according to claim 1 , wherein a plurality of hole arrays of the die are provided corresponding to a plurality of groups . In the sheet drilling device that drills holes in the sheet while allowing punches to enter the holes in the die,
At least one hole row of the die formed by arranging a plurality of holes of the die divided into a plurality of groups ;
The same number of punch rows as the hole rows formed by arranging a plurality of punches corresponding to the group of hole rows,
A guide member that is arranged so as to be reciprocally movable at a plurality of positions corresponding to the plurality of groups along the punch row and has a plurality of guide grooves corresponding to the punches of the punch row, and
A sheet punching device, wherein a punch of a group corresponding to the selected guide groove among the plurality of guide grooves is moved to enter the hole of the hole array of the die. In the sheet drilling device that drills holes in the sheet while allowing punches to enter the holes in the die,
At least one hole row of the die formed by arranging a plurality of holes of the die divided into a plurality of groups ;
The same number of punch rows as the hole rows formed by arranging a plurality of punches corresponding to the group of hole rows,
A plurality of guide members arranged in a movable manner along the punch row and having a plurality of guide grooves corresponding to each group of the punch row,
Along with the movement of the selected guide member among the plurality of guide members, the punches of the group corresponding to the guide groove of the guide member are moved to enter the holes in the hole row of the die. A sheet punching device. Hole rows of the die, the sheet punching device according to claim 4 or 5, characterized in that in correspondence with a plurality of groups are provided with a plurality. The sheet punching device according to any one of claims 1 to 3 , further comprising an urging unit that urges the punch in a direction in which the punch is separated from the hole of the die. Of the plurality of movement positions of the cam member, the diameter of the punch and die holes operated by the cam at one movement position, and the diameter of the punch and die holes operated by the cam at another movement position The sheet punching device according to claim 1 , wherein the sheet punching device is made different. The punch and die hole diameters corresponding to at least one cam member among the plurality of cam members and the punch and die hole diameters corresponding to other cam members are made different from each other. Item 3. A sheet punching device according to Item 2 . Of the plurality of movement positions of the guide member, the diameter of the punch and die holes actuated by the guide grooves at one movement position, and the punch and die holes actuated by the guide grooves at other movement positions 5. The sheet punching device according to claim 4 , wherein the diameter of the sheet is made different. The punch and die hole diameters corresponding to at least one guide member of the plurality of guide members and the punch and die hole diameters corresponding to other guide members are made different from each other. Item 6. A sheet punching device according to Item 5 . Sheet stacking means on which sheets are stacked,
Image forming means for forming an image on the sheet supplied from the sheet stacking means;
A sheet punching device according to any one of claims 1 to 11 wherein drilling a hole in the sheet on which the image has been formed by said image forming means,
An image forming apparatus comprising:

Images