JPH03227694A - Image formation post-processor - Google Patents

Abstract

PURPOSE:To largely improve the degree of freedom of a binding operation and to accurately align sheet bundles without inclination by engaging a stapler with a reference fence to move to a binding position corresponding to the size of a transfer sheet bundle and its using direction separately from a sheet aligning sheet aligning jogger fence. CONSTITUTION:A staple unit II has a stapler S, left and right jogger fences 217, 218, and reference fence 246, 247 mechanism. The stapler S is fixed to a stapler base, and movably engaged with a stapler slider in one direction. The fences operate to align sheet bundle in the stapling operation as a guide member for discharging the sheet bundle after binding. The fences 246, 247 moving separately are provided at the lower parts of the fences 217, 218. The engaging parts of the stapler S are provided at the fences 246, 247, and when the stapler S is moved to the upper position of the device, it is engaged, while when it is moved to the lower position, it is disengaged.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to image formation in which post-processing such as stapling is performed on transfer paper discharged by an image forming apparatus such as an electrophotographic apparatus or a printer. The present invention relates to a post-processing device.

[Conventional technique]

Conventionally, for example, JP-A-62-20046, JP-A-62-191375, JP-A-62-176246
Publication No. 62-290669, Japanese Patent Application Laid-open No. 1983
As described in Japanese Patent Application Laid-Open No. 82263, Japanese Patent Application Laid-open No. 101268/1983, transfer paper conveyed from an image forming apparatus is stored in a staple tray, the transfer paper is stapled, and the bound transfer paper is An image forming post-processing apparatus is generally known that is configured to drop a bundle of sheets onto a lower tray and discharge them.

[Problem to be solved by the invention]

However, in the conventional image forming post-processing device as described above, the jogger fence and the reference fence are connected or configured to be the same, so the stapling location by the stapling device is determined at a fixed position. In particular, depending on the direction of image formation on the transfer paper, that is, the direction of the writing force, there is a problem in that the binding process may be performed at a location different from the original binding position.

The present invention has been made in view of the above, and an object of the present invention is to solve the problems of conventional image forming and post-processing devices, and to execute binding processing at an appropriate location corresponding to transfer paper.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides an image forming post-processing device for binding transfer sheets discharged from an image forming apparatus using a staple section, in which the staple section includes a transfer paper receptacle and a transfer paper receptacle for the transfer paper. The receiver is provided with a stapling device for stapling the upper transfer paper, and the transfer paper receiver is provided with a reference fence and a jogger fence for aligning the upper transfer paper in the transfer paper conveyance direction and in the direction perpendicular to the transfer paper conveyance direction, respectively. The present invention provides an image forming post-processing device in which the jogger fence and the reference fence move independently and each is stopped and positioned at a desired location.

Further, the jogger fence is provided so as to be controlled to move independently of the stapling device, and the reference fence is fitted with the stapling device to determine the moving force of the stapling device as a reference. The present invention provides an image forming post-processing device that is provided with an engaging portion that transmits information to a fence.

Further, the two symmetrically arranged movable reference fences that perform transfer paper alignment processing in the transfer paper conveyance direction move the stapling device by the engagement portion in a state separate and independent from the jogger fence. The present invention provides an image forming post-processing device that moves in accordance with the image forming apparatus and is biased in the direction of the transport center by a biasing means connected thereto.

Further, the two symmetrically arranged movable reference fences that perform transfer paper alignment processing in the transfer paper conveyance direction move the stapling device by the engagement portion in a state separate and independent from the jogger fence. The present invention provides an image forming post-processing device in which the reference fence moves in accordance with the movement of one reference fence, and the other reference fence moves in conjunction with the movement of the other reference fence in the opposite direction.

Further, the two symmetrically arranged movable reference fences that execute the transfer paper alignment process in the transfer paper conveyance direction are provided so as to be controlled to move independently of the stapling device.

The present invention provides an image forming post-processing device in which, based on the movement of one reference fence, the other reference fence is moved in the opposite direction in conjunction with the movement of one reference fence in a separate and independent state from the jogger fence.

[Effect]

In the image forming post-processing device according to the present invention, the stapling device engages with the reference fence separately from the alignment jogger fence, or It is moved by a separate driving means, and at this time, a bundle of transfer paper is always held on the jogger fence.

〔Example〕

Embodiments of the image forming post-processing apparatus according to the present invention will be described below with reference to the drawings.

A finisher (image forming post-processing device) 100 shown in FIG. and a staple portion ■ on the lower side.

Below, ■Shift sorting is the configuration of part I, ■operation during normal copying processing, ■stapler/jogger fence and reference fence mechanism of staple unit H, ■discharge heald mechanism of staple unit ■, ■ejection of staple unit ■. Paper tray mechanism, ■Sipping processing operation, ■Ejection tray vertical movement, ■Jogger fence operation, ■Other operations in the stapling section■,
[Phases] The operation of the discharge belt in the staple section (2), the operation of the shift tray system in the staple section (2), the operation of the staple tray system in the @staple section (2), and the control system of the finisher (2) will be explained in detail in this order.

(2) Structure of shift sorting section I As shown in FIG. 1, a plurality of conveyance rollers and driven rollers driven by the rollers are arranged on the conveyance path of shift sorting section I. The rotation axis of the first conveyance roller 101 is
It is connected to the rotating shaft of the transport drive motor M1 via the first timing heald 102, thereby obtaining driving force. The first conveyance roller 1010 rotation axis is connected to the second
A timing belt (not shown) allows the rotation axis of the other conveyance rollers and the rotation axis of the discharge roller 103, and furthermore,
It is also connected to the rotating shaft of the paper gathering fur brush 104 and configured to drive them.

Further, an inlet sensor SNI is provided immediately before the most upstream transport roller 101, and a paper discharge sensor SN2 is provided immediately before the discharge roller 103. The rear end is now detected. A switching pawl 105 is disposed downstream of the first conveyance roller 101, and a driving solenoid 251 (see FIG. 9) and a spring (not shown) change the conveyance direction between stapling section 1 or shift sorting. The configuration is such that the output tray 220 or 106 in section (2) can be changed in either direction.

Further, as shown in FIGS. 2, 3, and 4, a fur brush 104 for gathering the paper is disposed directly below the paper ejection roller 103 in the vicinity of the paper ejection port. The transfer paper that has fallen onto the plate 106 is rotated toward the abutment plate 107 and abutted against the abutment plate 107, thereby aligning the rear edges of the transfer paper.

Furthermore, as shown in FIG. 3, the abutment plate 107 and the discharge tray 106 are formed with unevenness, and are configured to mesh with each other. As a result, the discharge tray 106 is configured to be able to move freely in the vertical direction relative to the abutment plate 107 and to move in conjunction with the abutment plate 107 in the front and back direction.

In FIGS. 4 and 5, the abutting plate 107 is supported by a ring-shaped shift guide 110 via a bearing 109 on the side of the main body that is different from the discharge tray 106, and is configured to be freely movable in the front and rear direction. has been done. Further, the abutting plate 107 is eccentrically connected to the crank 112 via an arm rond 111. The above crank 11
The rotation axis No. 2 is arranged parallel to the center axis of the image forming apparatus. A gear train 115 is disposed on a removable bracket 114 that vertically projects from the side plate 113, and the crank 112 is connected to the shift motor M2 via the gear train 115.

By driving the shift motor M2, the crank 112 is driven, and the eccentric rotation action of the crank 112 causes the abutment plate 107 to reciprocate in the front-rear direction. Therefore, the discharge tray 106, which is restricted in the front-rear direction with respect to the abutting plate 107, also reciprocates in the front-rear direction accordingly.

In addition, two shift detection plates 116 are protruded from the abutting plate 107 and are arranged at an interval approximately equal to the amount of movement by the crank 112. The shift detection sensor 117 detects that the abutment operation and the tray shift operation have moved one step and have stopped.

Furthermore, as shown in FIG.
08 is supported in a vertically movable and rotatable manner,
As a result, the upper surface of the discharge tray 106 and the stacked transfer sheets are pressed by their own weight. The transfer paper is pressed by the roller 108 by gravity and the conveying force by the paper gathering fur brush 104.
, and is hit by the abutting plate 107.

If the discharge tray 106 shifts due to the pressing force of the pressing roller 10 days, the transfer paper is prevented from shifting.

Opposed to the presser roller 108, a paper surface detection sensor S
N3 is arranged on the main body side, and when the position i & of the presser roller 108 rises due to accumulation of transfer paper, the paper surface detection sensor SN3 detects the presser roller support bracket 119.
, and thereby detects that the paper surface or the top surface of the output tray has reached a specified height.

7 and 8 show a mechanism for vertically moving the ejection tray 106, and the ejection tray 106 is fixed to a tray support 120. As shown in FIG. The tray support stand 120 has a hair ring 12
It is supported by the tray vertical movement table 118 via the tray 0a so as to be movable back and forth.

Therefore, as described above, the shifting operation by the abutment plate 107 can be performed by the tray vertical movement table 118.

As shown in FIG. 1, the tray upper and lower tables 118 are fixed to a third timing heald 121. As shown in FIG. The third timing heald 121 has front and rear side Fil13.
One unit is provided on the outside of each unit, and each is connected to a vertical drive pulley 122 and a driven pulley 123. Both of the vertical drive pulleys 122 are fixed to a vertical drive shaft 124 passing through between the side plates, and the vertical drive shaft 124 is connected to a gear 12 that incorporates a one-way clutch.
5 is attached. A one-way clutch built into the gear 125 is configured to transmit force in the direction of lifting the discharge tray 106 to the vertical drive shaft 124. The gear 125 is connected to the vertical drive motor M3 via a gear train, a worm wheel 126, a worm 127, and the like. Further, a hair ring 128 is attached to the side surface of the vertical movement support base 118, and by contacting the vertical guide rail 129 fixed to the side plate 113, the hair ring 128 acts as a vertical movement guide and generates a rotation moment due to the weight of the discharge tray 106. This prevents the ejection tray 106 from falling due to this.

With the above configuration, the lowering of the discharge tray 106 is normally stopped by locking the holding force of the worm 127 and the one-way clutch. Further, when the vertical movement drive motor M3 is rotated in the direction in which the discharge tray 106 rises, the one-way clutch is locked and the pulleys 122 and 123 rotate, thereby causing the discharge tray 106 to rise. When the vertical movement drive motor M3 is rotated in the downward direction of the ejection tray 106, the one-way clutch becomes free, thereby causing the ejection tray 106 to move downward.
descends due to its own weight.

Further, as shown in FIG. 9, there is an upper limit sensor SN inside the timing belt so as to oppose the discharge tray
4 and a lower limit sensor SN5 are installed, and when each detects the upper and lower detection plates 130, the output tray 106 is
The upper and lower limits of can be detected. Here, the upper limit sensor SN4 is configured to detect the tray height obtained by the paper surface detection sensor SN3 when there is no paper on the discharge tray 106. Ejection tray 10
6, the one-way clutch is in a free state, so the driving force of the vertical drive motor M3 is not transmitted to the discharge tray 106, and even if the discharge tray 106 is stopped by an external force during the descent, the vertical motion drive is not transmitted. Motor M
3 is idly rotated to prevent problems such as overloading of the motor and pinching of fingers.

■Operation during normal copying process When the copying process starts, the soft motor M2 is driven and the crank 112 is rotated, so that the abutting plate 107 is attached to the crank 112 through the arm rod 111 in the front-back direction. Move to. Accordingly, the discharge tray 106, which is supported in a manner that engages with the concave and convex portions of the abutment plate 107 and is movable vertically and longitudinally, is moved in the front-back direction and a shift operation is started. Thereafter, the shift detection sensor 117 detects the other shift detection plate 116 that is different from the one shift detection plate 116 detected before the start of the shift operation.
When detected, the shift motor M2 is stopped by the signal, and the shift operation is completed. After the shift operation is completed, the vertical drive motor M3 is driven in the l-ray upward direction, and the discharge tray 106 is elevated. After starting the vertical movement,
When a part of the support bracket 119 of the presser roller 108 is detected by the paper surface detection sensor SN3 or when the upper limit sensor SN4 detects the vertical detection plate 130, the vertical movement drive motor M3 is stopped by the signal and the ejection tray 106 is moved. The ascent will end. When the paper surface detection sensor SN3 detects the support bracket 118,
When the vertical movement drive motor M3 is driven in the tray lowering direction and the paper surface detection sensor SN3 no longer detects the support bracket l-118, the vertical movement drive motor M3 is stopped.

A transfer roller 101 receives the transfer paper discharged from the image forming apparatus main body at the same linear speed as the discharge speed from the main body. When the transfer paper is conveyed and the entrance sensor SNI detects the rear end of the transfer paper, the linear velocity is increased to a value greater than the main body discharge speed of the transfer paper, and the rear end of the transfer paper is detected by the entrance sensor. After a predetermined period of time after the SNI detects the transfer paper, the linear velocity is returned to the main body ejection speed of the transfer paper, and then the paper is ejected to the ejection tray 106. The transfer paper discharged to the discharge tray 106 is transferred by gravity and by the fur brush 104 for paper gathering.
The rear end is aligned by sliding under the presser roller 108 and abutting against the abutting plate 107 due to the conveying force caused by the rotation.

At this time, when a specified number of copies have been ejected, the shift motor M2 is driven by the signal and a shift operation is started. - When the process shift is completed, the shift motor M2 stops. This operation causes the output tray 106 to
The upper stacking position of the transfer paper is changed, and the transfer paper is sorted.

Thereafter, when the series of copying operations is completed and the last sheet is ejected, the vertical movement drive motor M3 is driven in the downward direction by the signal, and the operation ends after the ejection tray 106 is lowered by a specified amount.

When a certain amount of transfer paper is accumulated and the paper surface approaches the paper ejection port and a part of the presser roller support bracket 118 is detected by the paper surface detection sensor SN3, the vertical movement drive motor M3 is driven in the tray lowering direction by the signal. , warm 1
The holding force of 27 and the lock of the one-way clutch are released, and the discharge tray 106 is lowered by its own weight.

When the output tray 106 is lowered and the paper surface is lowered and a part of the presser roller support bracket 118 is no longer detected by the paper surface detection sensor S N 3 , the vertical movement drive motor M 3 is stopped by the signal, and the worm 12 is stopped.
The holding force of 7 and the locking of the one-way clutch work to stop the discharge tray 106.

As the discharge tray 106 descends, the vertical movement drive motor M3 is stopped by a signal when the vertical detection plate 130 is detected by the lower limit sensor SN5, thereby preventing the discharge tray 106 from descending further.

■Stapler of staple section H, jogger fence,
and reference fence mechanism Next, the configuration of the staple portion H is shown in FIGS.
This will be explained with reference to the drawings and FIG.

First, the stapler 8 is fixed to a stapler stand 201. The stapler stand 201 has a guide bin 2 in the guide hole 202a of the stapler slider 202.
03 so that they can move in one direction as shown in FIG. Further, a shaft 204 is fixed to the back side of the stapler stand 201, and a guide roller 205 is rotatably attached to the shaft 204.

The upper part of the stapler slider 202 is attached so as to be slidable in the direction perpendicular to the plane of FIG. A guide roller 209 attached to the lower portion of the stapler slider 202 is in rolling contact with the surface of the stay 210 on the main body side, thereby locking the stapler slider 202 in the rotational direction. Also, stay 21
A guide cam 211 is fixed to the guide cam 211, and the guide roller 205 is brought into contact with the cam surface formed at the upper end of the guide cam 211 so as to rotate. - The slider 202 reciprocates in the direction in FIG. 1A. At this time, the central portion of the guide cam 211 is formed to be recessed downward, and the cheapler slider 202 moves along this.

A detection plate 202b is provided at the upper end of the stapler slider 202, and this detection plate 202b is connected to a home position sensor 212 provided on the main body side.
The home position ( ) (P) of the stapler 8 is detected by shielding the detection section of the stapler 8 . A stamping motor M20 for moving the stapler is attached to the side plate 206.
An intermediate portion of the belt 213 driven by the stapler slider 202 is fixed to the stapler slider 202, and the stapler slider 202 reciprocates in the left-right direction in FIG.

A jogger fence rod 214 is hung between the side plates 206 and 207, and a left slider 216 and a right slider 215 are attached to this jogger fence rod 214.
A left jogger fence 218 and a right jogger fence 217 are each fixed to the left jogger fence 218 and the right jogger fence 217, respectively. The left jogger fence 218 and the right jogger fence 217 have a function of aligning a bundle of sheets in a stapling operation, and extend from the vicinity of the discharge roller 219 to the vicinity of the paper discharge tray 220, so that the sheets after the stapling process are It has a function as a guide member when discharging the bundle.

The left slider 216 and right slider 215 are fixed to a midway portion of a belt 221 driven by a jogger fence driving motor M21. These left slider 216 and right slider 215 are connected to belt 221
10, so that the left jogger fence 218 and the right jogger fence 217 can be reciprocated symmetrically in the left-right direction in FIG. Guide rollers 222 are attached to the upper rear sides of the left jogger fence 218 and the right jogger fence 217, and the guide rollers 222 are attached to the side plates 206.
．． Guide stay 223 that is hung on top of 207
I am being asked to transfer to another company. Left slider 216
is provided with a detection plate 216a, and the detection plate 21
The home position (HP) of both the jogger fences 21B and 217 is determined by blocking the detection part of the home position sensor 224 provided on the main body side.
is detected. On the other hand, as shown in FIG. 15, the left jogger fence 218 and the right jogger fence 217
A curl presser 225 is provided at the lower end of the
This suppresses buckling during loading on the staple tray. The curl presser 225 is made of an elastic member such as a polyester film.

At the lower part of the left jogger fence 218 and right jogger fence 217, there are provided reference fences 246 and 247 that move separately from the left jogger fence 218 and right jogger fence 217, and each of these reference fences 246 and 247 The lower end edge of the paper bundle is held against rear end abutting portions 246a and 247a formed in hook shapes at the lower end portions of the paper bundle. Further, each of these reference fences 246 and 247 is connected to a reference fence driving motor M.
The reference fences 246 and 247 are respectively fixed to intermediate portions of different heald parts of the heald 290 driven by the reference fences 24, and thereby the reference fences 246 and 247 are configured to be symmetrically reciprocated in the left-right direction of FIG. ing.

An engaging portion for the stapler 8 is provided between the rear end abutting portions 246a and 247a formed on each of the reference fences 246 and 247, respectively. When the stapler 3 is moving in the upper position, which is the region on both ends of the apparatus, each of the engaging parts is engaged with the stapler 3, and the stapler S is moving in the lower position, which is the central region of the apparatus. The stapler 3 is configured to be in a detached state from the stapler 3 when the stapler 3 is being moved. In addition, stapler 5 and reference fence 2
46 and 247 are connected through the above-mentioned respective engaging portions, the moving force of the stapler 3 is applied to the reference fence 24.
6.247, and at this time, the reference fence 246.247 moves as the stapler 3 moves.

Incidentally, in reality, one of the two reference fences 246 and 247 is connected to the stapler 3 via an engaging portion, and one of the reference fences 24 that is in a state of engagement with the stapler 3
6.247, the other reference fence 246.247, which is in the detached state, moves symmetrically.

FIG. 10B shows a second embodiment of the staple portion.
A schematic diagram of FIG. 10A is shown, and the same parts as in FIG.

In this embodiment, the left and right reference fences 246.247
is configured to be movable left and right by a guide member (not shown). In this state in which left and right movement is possible, the left and right reference fences 246 and 247 are always biased by springs 28 and 289 in the direction of returning to the central portion of the conveyance.

In FIG. 10B, the stapler 3 and the left reference fence 247 are engaged at the engagement portion, so the spring 247 is engaged with the left reference fence 247.
However, the right reference fence 246 is not engaged with the stapler 3 which has a moving force, so that the spring 28
It is in a state where it is returned toward the central portion of conveyance by the urging force of No. 8.

In this way, the reference fences 246 and 247 for aligning the transfer sheets in the transport direction are replaced by the jogger fences 217 and 247.
218, the two reference fences are biased by springs 28B and 289 in the direction of returning to the central portion of the conveyance, and the two reference fences 246 and 247 are moved along with the movement of the stapler 8. Because of this configuration, it is possible to staple at any position on the transfer paper, and even if the reference fences 246 and 247 are shifted during jam handling, for example, the stapler always returns to the vicinity of the center of conveyance. 5 and reference fence 246
．． The situation where H.247 is incompatible will no longer exist.

Furthermore, since it is only necessary to set the reference fences 246 and 247 in a movable state, there is no need for a driving means (motor, belt, etc.) for driving the reference fences, which has the effect of reducing the number of parts inside the apparatus.

FIG. 10C shows a third embodiment of the staple portion.
A schematic diagram of FIG. 10A is shown, and the same parts as in FIG.

In this embodiment, the left and right reference fences 246.247
is configured to be movable left and right by a guide member (not shown). In this state where the left and right reference fences 246 and 247 can be moved left and right, the pulley 290a
A belt 290 (this belt is connected to an independent drive means 1, e.g. motor M2 shown in FIG. 10A)
4 is the middle part 2 of the different belt parts (not connected)
91, and are configured to be movable symmetrically in the left-right direction in FIG. 10C.

In FIG. 10C, the stapler 3 and the left reference fence 247 are engaged at the engaging portion, so the stapler 3 moves to the binding position for the transfer paper, but the right reference fence 247 As the left reference fence 247 moves, 246 moves the belt 290 in the opposite direction by the amount of movement.
are moved symmetrically by

In this way, the reference fences 246 and 247 for performing transfer alignment in the transport direction are replaced by the jogger fences 217 and 247.
218, the two reference fences move symmetrically via the heald 290, and the two reference fences 246 and 247 are configured to move along with the movement of the stapler 8. This allows binding at any position on the transfer paper, and it always moves symmetrically, so when one reference fence returns to the center of transport, the other fence always moves to the center of transport. Since the stapler 3 and the reference fences 246 and 247 are in a standby state, the state in which the stapler 3 and the reference fences 246 and 247 cannot be engaged is eliminated.

Furthermore, since it is only necessary to set the reference fences 246 and 247 in a movable state using the pulley 290a and the heald 290, there is no need for a driving means (motor, etc.) for driving the reference fences, which has the effect of reducing the number of parts inside the device. be.

(2) Release belt mechanism of staple portion (2) The release belt mechanism of staple portion H will be described with reference to FIGS. 13 and 14. Both side plates 2
A drive shaft 226 is attached to the upper end portion of the drive shaft 226 so as to cross over the drive shaft 226, and a drive pulley 227 is fixed approximately at the center of the drive shaft 226. Also,
A fixed pulley 2 is attached to the lower part of the drive pulley 227.
28 are provided, and both pulleys 227.22
An endless release heald 229 is passed between the two. The middle portion of the discharge heald 229 is hung on an idle pulley 230 and is guided by a guide plate 250 disposed inside the discharge heald 229 to prevent bending and displacement. Further, a belt drive motor M22 is fixed to the side plate 206, a boo U-231 is attached to the output shaft of the heald drive motor M22, and a pulley 232 is attached to one end side of the drive shaft 226. A heald 233 is interposed between the belt and the belt so that the belt driving force is transmitted. Furthermore, a protruding pawl 234 is provided in the middle of the back surface of the discharge heald 229 so as to grip the paper stack from below. As shown in FIG. 1, a home position sensor 235 for detecting the position of the claw 234 is provided inside the discharge heald 229, and the home position (HP) of the claw 234 is detected by this home position sensor 235. be done.

The conveyance speed ■2 of the ejection belt 229 is set to be slightly larger than the paper discharge linear velocity ■1 of the paper discharge roller 219 (V2≧■1), so that the paper stack for the next job is It is configured so that it is not ejected together with already bound paper bundles.

Further, a hook-shaped rear end abutting portion 250a is provided at the lower end portion of the guide plate 250, and the lower end edge of the paper stack is held against this rear end abutting portion 250a. It has become so.

As described above, each function of the stapler 8 is configured to form a unit of -, and the guide rail 236
．． 237 (see Figure 1) so that it can be pulled out to the front.

■ Paper ejection tray mechanism of staple section H The paper ejection tray mechanism consists of the paper ejection tray 2 as shown in FIG.
The base of 20 is fixed on a tray stand 238. A guide roller 239 is rotatably attached to the tray stand 238, and when the guide roller 239 engages with a guide rail (not shown), the paper output tray 220 moves vertically together with the tray stand 238. It has become.

Further, the tray stand 238 is biased upward by a lift spring 240.

Driving force is transmitted to the transport rollers 241, 242, and 243 from a transport motor M23 by a heald (not shown). Furthermore, fur brushes 245a and 245b are attached to the rotating shaft 244 of the discharge port roller 219, and these fur brushes 245a and 245b are rotationally driven in synchronization with the discharge roller 219.

The bristles of the fur brushes 245a and 245b are in contact with the guide plate 250. The guide plate 250 is formed with protruding ribs 250b protruding toward the front side, and these protruding ribs 250b and the fur brush 24
The transfer paper is bent toward the back side by the pressing force from the bristles 5a and 245b, and is deformed into a wavy shape, thereby giving it a certain stiffness to prevent buckling.

Furthermore, as shown in FIG. 15, the amount of protrusion of the upper guide plate 248 of the paper ejection section from the center of rotation of the paper ejection roller 219 is set to be larger than the amount of protrusion 11 of the paper being fed. , in case the fur brush 2 above
Even if the transfer paper does not fall below 45a, 245b and enters between the upper guide plate 248 and Fabruns 245a, 245b, the rear end of the transfer paper is scraped downward by the bristles of the fur brushes 245a, 245b. It is configured as follows.

■Binder processing operation The binding processing operation of transfer paper will be explained.

First, the stapling operation is selected using the staple key, the original (N sheets) is placed on the original feed tray (RDH2 not shown), and the number of copies (K copies) is input using the numeric keypad, and then the copy start button is pressed. When the copy size signal is sent from the image forming apparatus to the finisher (
Image formation post-processing 2) is inputted to the finisher 10.
0 determines whether the size of the transfer paper is such that it can be carried into the stapling section H. If the size is such that it can be carried into the staple section ■, the ejection heald 22
It is determined whether the claw 234 of No. 9 is at the home position (IP). If it is not in the home position, the claw 23 of the ejection heald 229 is moved by the belt drive motor M22.
4 is returned to the home position. It is detected whether or not the stapler 8 is at the home position. If it is at the home position, the stapler 5 moves based on the copy size signal. If it is not at the home position, it moves to the home position and then receives the copy size signal. The stapler 8 moves based on.

Further, it is detected whether or not the jogger fence 217, 218 is at the home position (HP), and if the home position is detected, the jogger fence 217, 218 is moved to a predetermined position based on the size signal, If the home position is not detected, the jogger fences 217 and 218 are configured to move until the home position is detected, and then move to a predetermined position in response to the size signal. At this time, the moving location is a mm on one side and 2 am+m on both sides from the size width.

Thereafter, when the leading edge of the transfer paper is detected by the entrance sensor SNI, the switching guide member 105 is switched to the staple tray by the switching solenoid 251 to guide the transfer paper. When the trailing edge of the transfer paper passes through the entrance sensor SNI, high-speed feeding occurs. The switching solenoid 251 is turned off after a predetermined time has elapsed after passing through the entrance sensor SNI, that is, the time until passing through the switching guide member 105. After that, the discharge roller 21
When the transfer paper is discharged to the staple tray by 9 and the discharge process is being performed, the paper discharge section upper guide plate 248
The charge on the transfer paper is removed by a charge removal brush 249 fixed to the transfer paper. The paper discharge roller 219 is provided with a flap, which bends the transfer paper into a wave shape to give it stiffness. When the rear end of the transfer paper passes through the discharge roller 219, the rear end of the transfer paper is pushed down by the coaxial fur brushes 245a and 245b, and the rear end of the transfer paper passes through the rear end abutting portion 250.
a, 246a, and 247a, so as to be brought into contact with each other. After passing through the lower paper discharge sensor 5NII and a predetermined time has elapsed, the jogger fence 2 that had been waiting until then
17. The forward and reverse rotation by the drive motor M21 of 218 is l.
This is repeated one or two times, thereby aligning the transfer paper in the width direction, and after such paper alignment processing is executed, it is returned to the standby position. This alignment operation is repeated for each transfer sheet until a one-job end signal is issued from the main body of the image forming apparatus.

Next, when an end signal for one job is input from the main body of the image forming apparatus, the above-described operation is performed again, and then the bundle of transfer sheets is held down in the width direction by the jogger fences 217 and 218. Then, the drive motor 2 in the stapler 3
52 starts driving, and the bundle of transfer sheets is bound. In this binding operation, it is determined whether the binding is performed in one place or not. If the binding is performed in one place, the jogger fence 2
7.218 moves to a position slightly away from the paper bundle. If the stapler is to be stapled in two or more places, the stapler is moved to a predetermined position by the moving motor M20 and the stapling operation is performed again. You will be returned to the position you escaped from.

To explain the operation of the reference fences 246 and 247 at this time, - First, the reference fence 2 at the left end of FIG.
The lower end engaging portion of 47 is fitted into the stapler 8,
In this state, the stapler 3 moves to the right side of FIG. 10A. Thereafter, as the stapler 8 moves, the reference fence 247 is moved toward the center and moved to the position shown in FIG. 10A(1). At this time, the other reference fence 246 is also moved symmetrically (in the embodiment shown in FIG. 10B, the reference fence 246 is always at the position of FIG. 10A (mountain) due to the biasing force of the spring 288. 10A(iii)). From the position shown in Figure 10 A(1),
When the stapler 3 further moves to the right in FIG. 10A,
The stapler 3 moves downward and leaves the reference fence 247. Therefore, the reference fence 247 and the reference fence 246 are
They will each stop at the positions indicated by . stapler
5 moves through the central position shown in FIG. 10A(ii) to the upper position shown in FIG. 10A(iii),
The stapler 8 is fitted into the engaging portion of the reference fence 246 that was waiting at that position, and the stapler 3 and the reference fence 246 are thereby moved together to the right end side in FIG. 10A. . At this time, the other reference fence 247 is also moved symmetrically to the original left end position.

In the second embodiment shown in FIG. 10B, first the 10th
The lower end engaging portion of the reference fence 247 located at the left end in FIG. 10B is fitted into the stapler 5, and in this state, the stapler 3 moves toward the right side in FIG. 10B. Thereafter, as the stapler 5 moves, the reference fence 247 is moved toward the center and moved to the position shown in FIG. 10B(i). At this time, the other reference fence 246 has already been moved to the position shown in FIG. 10B(iii) by the biasing force of the spring 288.

The stapler is further removed from the position shown in Figure 10B(1).
5 moves to the right in FIG. 10B, the stapler 8
moves downward and leaves the reference fence 247.

When the stapler 3 passes through the central position shown in FIG. 10B(ii) and moves to the upper position shown in FIG. 10B(iii), the reference fence 2 waiting at that position
The stapler 3 is fitted into the engaging portion 46, and the stapler 3 and the reference fence 246 move together toward the right end in FIG. 10B against the biasing force of the spring 288. However, the other reference fence 247 does not move symmetrically but remains at the position shown in FIG. 10B(i) due to the biasing force of the spring 289.

Such stapler 8 and reference fence 246.2
By the operation 47, the stapler 3 can be moved to any position other than the range where it is in the lower position.

At this time, the discharge heald 229 is rotated in the direction shown in FIG. 12, and the claw 234 does not push up the rear end of the transfer paper stack, so that the transfer paper stack is ejected to the staple tray in the same direction as the discharge direction. is discharged.

It is determined whether the last set number of copies (K copies) has been completed, and when the set number of copies (K copies) has been completed, the jogger fence 217, 218 and stapler 8 are moved to the home position, and if they have not been completed yet, the above-mentioned operation is executed again. be done.

■ Vertical movement of the ejection tray In such a device, the vertical movement of the ejection tray 106 is performed either when the power is turned on or when a mote is selected. is changed, and the current position of the output tray 106 is determined. If the upper limit sensor SN4 and paper surface detection sensor SN3 are set to ON, the vertical movement drive motor M
3 is turned on, and the output tray 106 is lowered to the point where the paper surface detection sensor SN3 is turned off.

Nothing is executed if only the upper limit sensor SN4 is turned on. Upper limit sensor SN4, lower limit sensor S
When N5 and the paper surface detection sensor SN3 are all turned off, the vertical movement drive motor M3 is turned on and the output tray 106 is raised to the point where the upper limit sensor SN4 or the paper surface detection sensor SN3 is turned on, and the paper surface detection sensor is turned on. When SN3 is turned on, it is lowered until the paper surface detection sensor SN3 is turned off. When only the paper surface detection sensor SN3 is turned on, the vertical movement drive motor M3 is turned on and the discharge tray 106 is lowered until the paper surface detection sensor SN3 is turned off. When the lower limit sensor SN5 and the paper surface detection sensor SN3 are turned on, it is determined that the transfer paper on the discharge tray 106 is less than the loading capacity. When a signal indicating that the paper is full is sent to the main body of the image forming apparatus, the transfer paper is removed and after a predetermined time, the vertical movement drive motor M3 is turned on, and the operation continues until the upper limit sensor SN4 or the paper surface detection sensor SN3 is turned on. The output tray 106 is raised. When the paper surface detection sensor SN3 is turned on, the output tray 106 is lowered until the paper surface sensor SN3 is turned off. When restarting in the same mode, the same operation as when turning on the power and selecting the mode is performed in synchronization with the copy start signal of the main unit.

During copying and at the end of copying, the paper surface detection sensor SN
3 is turned on, the vertical movement drive motor M3 is turned on and the paper surface detection sensor SN3 is turned off, so that the output tray 10 is turned on.
6 is lowered. When this operation is repeated and the lower limit sensor SN5 is turned on, the output tray 106
A signal indicating that the transfer paper is full is sent to the main body of the image forming apparatus. If this operation overlaps with a tray shift operation, priority will be given to the tray shift operation, and during the shift operation, it will be put on standby and executed after the shift operation is completed. After the last sheet passes through the main body sheet ejection sensor SN6, a finisher stop signal is sent. When this signal is received, the vertical movement drive motor M3 is turned on after the last sheet is ejected to the ejection tray 106. Then, the discharge tray 106 is lowered by a predetermined amount, and the transfer paper can be easily taken out.

Next, when the power is turned on, no shift operation is performed, and when the shift or blue mode is selected and the mode signal is received, the shift motor M2 is turned on, the ejection tray 106 is moved, and the shift 1 detection sensor 117 is activated. When turned on, shift motor M2 is turned off. Through this operation, the transfer paper remaining on the discharge tray 106 and the transfer paper for a new job are sorted.

Such an operation is put on standby while the tray is moving up and down, and is executed after the up and down movement is completed. By doing this, even if there is transfer paper remaining on the output tray 106, the pressing roller 108
The transfer paper is held in place so that it does not shift during shifting.

During copying and at the end of copying, when the last sheet of the copy set passes through the main body sheet ejection sensor SN6, a shift signal is sent, and the finisher receives this signal and causes the trailing edge of the last sheet to pass over the sheet ejection sensor SNZ. , after a predetermined period of time has elapsed, the shift motor M2 is turned on and a shift operation is started.

When the shift detection sensor 117 is turned on, the shift motor M2 is turned off. The above operation has priority over the tray up and down movement, and the tray up and down movement is put on standby during the shift operation, and the up and down movement is performed after the shift is completed. This prevents paper from shifting due to shifting.

When a restart is performed in the same mode, no shift operation is performed at the start of copying, and during copying, the same operation as at the time of copying is performed.

■Jogger fence movement Next, the jogger fence operation will be explained.

First, when turning on the power and selecting a mode, the jogger home position sensor 224 and the tray paper are set to non-sensor S.
The output state of N9 is checked by the CPU, and the following operations are executed.

If only jogger home position sensor 224 is turned on, nothing is executed.

If tray paper presence detection sensor SN9 is turned on,
A signal indicating that transfer paper remains on the staple tray is sent to the main body of the image forming apparatus. When the jogger home position sensor 224 and the tray presence/absence sensor SN9 are turned off, the jogger drive motor M21 is turned on and the jogger fences 217 and 218 move toward the home position, and when the jogger home position sensor 224 is turned on, the jogger Drive motor M21 is turned off.

During copying, at the end of copying, and at the time of restarting copying, if a paper size signal is received after the image forming apparatus starts copying, the jogger drive motor M21 is turned on, the jogger fences 217 and 218 move, and the width of the paper is adjusted. It is stopped at a position a predetermined amount ahead of its size and enters a standby state. When the transfer paper passes through the paper discharge sensor 5NII and a predetermined period of time has elapsed, the jogger drive motor M21 is turned on, and the jogger fences 217 and 218 in the standby position move to perform paper alignment, and are returned to the standby position again. It will be done. At this time, the jogger drive motor M21 repeats forward and reverse rotation once to several times, thereby causing the jogger fence 217.
218, an alignment operation is performed in the width direction of the paper. Such an operation is performed every time the transfer paper is discharged onto the staple tray.

When the last sheet of the copy set passes through the main body sheet ejection sensor SN6, a stapling signal is transmitted, and upon receiving this signal, the last sheet is ejected to the staple tray, and after the above paper alignment operation is performed, the paper is aligned in the width direction. The jogger fences 217 and 218 are moved to the holding position and stopped.

When the stapling operation is finished, jogger fence 217
．． 218 moves to a position slightly away from both ends of the paper in the width direction. The transfer sheet bundle is then discharged onto the paper discharge tray 220 by the discharge belt 229 . By doing this, it is possible to prevent the paper from shifting during stapling, and the jogger fences 217 and 218 are used as guides in the width direction when discharging the recording bundle.

When the above-described operation is repeated for several copies and the final transfer sheet bundle is ejected onto the paper ejection tray 220, the jogger fence drive motor M21 is turned on.
The jogger fences 217 and 218 move toward the home position, and the jogger home position sensor 224
When turned on, the jogger drive motor M21 is turned off.

■Other operations in the stapling unit■When turning on the power for stapler operation and selecting a mote, the 1 rotation sensor SN7, staple presence/absence sensor 5NIO, stapler
The output state of the home sensor 212 is checked by the CPU, and the following operations are executed.

If the tray discharge sensor SN9 is turned on while the one-rotation sensor SN7 is turned off, it is determined that there is a stapling failure, and a stapler abnormality signal is sent to the main body of the image forming apparatus.

When the staple presence/absence sensor 5NIO is in the OFF state, a stapler-no-staple signal is transmitted to the main body of the image forming apparatus. If stapler home sensor 212 is on, nothing is done. If the stapler home sensor 212 is turned off and the one-rotation sensor SN7 is turned on, the stapler movement motor M39 is turned on and the stapler 8 is moved toward the home position. When the stapler home sensor 212 is turned on, the stapler moving motor M39 is turned off. If the one-rotation sensor SN7 is turned off, it is determined that a stapling error or a jam has been processed, and the printer waits in that state. When the one-rotation sensor SN7 is turned on by artificial processing, the stapler f hyperactive motor M39 is turned on, the stapler is moved toward the home position, the stapler home sensor 212 is turned on, and then the stapler hand hyperactive motor M39 is turned on. Configured to be turned off.

When copying, at the end of copying, and at the time of restarting copying, the stapler movement motor M39 is turned on after the image forming apparatus main unit receives a copy-is signal at the start of copying, and the stapler is moved to the position corresponding to the size. The quantitative stapler 8 is moved. Next, after the last sheet of copy cents passes the main body paper ejection sensor SN6, a staple ON signal is transmitted from the main body, and when that signal is received, the last paper is ejected onto the staple tray, and the jogger fences 217 and 218 When both ends of the transfer sheet bundle in the width direction are pressed, the staple motor 252 is turned on to perform a stapling operation, and when the one-rotation sensor S N 7 is turned on, the staple motor 252 is turned off. In the case of the two-position stapling mode, the stapler movement motor M39 is turned on and after the stapler 8 has been moved by a predetermined amount according to the paper size, the stapler movement motor M39 is turned off and the two-position stapling operation is executed. .

When this kind of stapling operation is repeated for several copies and the final transfer paper stack is stapled, the stapler
When the movement motor M39 is turned on, the stapler 3 moves toward the home position, and when the stapler home sensor 212 is turned on, the stapler movement motor M3 is turned on.
9 is off.

[Phase] Operation of the ejection heald in the stapling section (3) Next, the operation of the ejection belt will be explained.

When the power is turned on and when a mode is selected, the CPU checks the output states of the held home sensor 235, the tray discharge sensor SN9, and the rotation sensor SN7, and the next operation is executed. If the held home sensor 235 is turned on and the tray discharge sensor SN9 is turned off, nothing is executed. Held home sensor 2
35. If the tray ejection sensor SN9 is both off, it is determined that the ejection belt 229 has not returned to the home position, the heald drive motor M22 is turned on, the ejection heald 229 operates, and the heald home sensor 23
When 5 is turned on, the heald drive motor M22 is turned off. If the held home sensor 235 is turned off and the tray ejected sensor SN9 is turned on, and the tray ejected sensor SN9 is turned on, it is determined that there is a defective ejection, and the stack of transfer paper on the staple tray is removed ( A signal is output to the main body of the image forming apparatus.

After the transfer paper stack is removed, the belt drive motor M22
is turned on to operate the ejection belt 229, and when the held home sensor 235 is turned on, the belt drive motor M2 is activated.
2 is turned off.

At the end of copying and copying, the last sheet of the copy set is ejected onto the staple tray, and when the stapler 8 performs a slurping operation on the stack of transfer sheets, the 1-rotation sensor SN7 is turned on and the sheet is properly densified. Confirm that it has been processed. Thereafter, the belt drive motor M22 is turned on, the discharge heald 229 is operated, and the stack of bound transfer sheets is discharged onto the paper discharge tray 220. When the belt home sensor 235 is turned on, the heald drive motor M22
is turned off. Such operations are repeated for each copy.

■Operation of the shift tray system in the stapling section■ In the shift 1-1-lay system of the conveyance system, when the image forming apparatus main body starts copying, a finisher start signal is transmitted, so this signal is not received. Then, the B feed motor 190 is turned on, and low-speed operation is performed at the same speed as the main body linear speed. When the transfer paper is discharged from the main body of the image forming apparatus and the entrance sensor SNI is turned on, a timer is set and it is monitored whether the transfer paper passes the entrance sensor SNI within a predetermined time, and a jam is detected.

When the rear end of the transfer paper passes through the entrance sensor SNI and the entrance sensor SNI is turned off, the transport motor 190 is switched to high-speed operation and the transport speed is increased. Also, the timer is set and the leading edge of the transfer paper is detected by the paper discharge sensor S N
2 is turned on within a predetermined period of time to detect a jam. When a predetermined period of time has elapsed after passing the entrance sensor SNI, the transport motor 190 is returned to low-speed operation to prepare for the next transfer sheet. Paper ejection sensor S N
2 is turned on by the transfer paper, a timer is set, and a jam is detected by monitoring whether the transfer paper passes within a predetermined time.

By repeating this operation, when a shift signal is received in the shift tray mode, a shift OK signal is output after a predetermined period of time has elapsed since the last sheet of the copy set passed the paper ejection sensor SN2. The timing at which the shift operation is performed is measured. The finisher stop signal is sent when the final transfer sheet is ejected from the main body, so when that signal is received, the finisher stop signal is received after the final transfer sheet has passed the ejection sensor SN2 and after a predetermined period of time has elapsed. Transport motor 190 is turned off.

■Operation of the staple tray system in the stapling unit ■Next, in the staple tray system, when the main body of the image forming apparatus starts copying, a finisher start signal is sent, so when that signal is received,
The transport motor 190 is turned on, and low-speed operation is performed at the same linear speed as the image forming apparatus main body. When the transfer paper is ejected from the main body and the entrance sensor SNI is turned on, the switching solenoid 251 and the lower conveyance motor 191 are turned on at low speed, the timer is set, and the transfer paper passes through the entrance sensor SNI within a predetermined time. is monitored to detect jams. When the rear end of the transfer paper passes through the entrance sensor SNI, the entrance sensor SNI is turned off, and after a predetermined period of time has elapsed, the lower transport motor 191 is switched to high-speed operation and the transport speed is increased. Also, a timer is set and jam detection is executed by monitoring whether the leading edge of the transfer paper turns on the lower paper discharge sensor 5NII within a predetermined time. The switching solenoid 251 is turned off after a predetermined period of time has elapsed after the trailing edge of the transfer paper passes the entrance sensor SNL. When the lower paper discharge sensor 5NII is turned on by the transfer paper, a timer is set, and it is monitored whether the transfer paper passes within a predetermined time to detect a jam.

When a predetermined time has elapsed after the transfer paper passes the lower paper discharge sensor 5NII, the lower conveyance motor 191 is switched to low speed operation.

By repeatedly executing such an operation, when a staple signal is received, a paper alignment operation is performed by the jogger fence after a predetermined period of time has elapsed after the last paper of the copy cent passes the lower paper discharge sensor 5NII. After that, the timing at which the stapling operation is performed is measured.

When the final transfer paper is ejected from the main body, a finisher stop signal is sent. When that signal is received, the transport motor is activated after a predetermined period of time has elapsed after the final transfer paper has passed the ejection sensor 5NII. 190 and lower transport motor 191 are turned off.

■ Finisher control system Furthermore, as shown in Figure 16, the CP on the image forming apparatus side
The U and the CPU on the finisher side are connected by an optical fiber.

In the shift tray section of the finisher, CPU1
000, a transport motor 1002 is connected to each via a servo control circuit 1001, a vertical motor 1004 is connected via a forward/reverse driver circuit 1003, and a shift motor 1006 is connected via a forward/reverse driver circuit 1005. is connected. Furthermore, the above CP
Various sensors and switches 1 for U100O
A signal from 007 is input.

Furthermore, the CPU 100O has an interface l10.
The connector is connected to the staple portion via 1030. A staple unit 1008 is connected to the interface T10, a transport motor 1011 is connected via a servo control circuit 1009, and an ejection motor 10 is connected via a servo control circuit 1012. Further, a jogger motor 1015 is connected through a stepping motor control circuit 104, and a stapler moving motor 1017 is connected through a stepping motor control circuit 1016. Furthermore, in the above interface l701030,
Signals from various sensors and various switches 1018 are input.

〔Effect of the invention〕

As described above, the image forming post-processing apparatus according to the present invention includes a transfer paper receiver in the stapling section, a stapling device that compacts the upper transfer paper, and a stapling device that densifies the upper transfer paper, and the transfer paper receiver includes a A reference fence and a jogger fence are provided to align the paper in the transfer paper conveyance direction and in a direction perpendicular to the transfer paper conveyance direction, respectively, and the jogger fence and the reference fence move independently to align each paper to a desired location. Since the reference fence for alignment is moved in conjunction with the above-mentioned stapling device, the staple can be arbitrarily moved to the appropriate location corresponding to the transfer paper using a simple mechanism, and the stapling operation The degree of freedom can be greatly improved. Furthermore, since the reference fence moves according to the paper size, the stack of papers can be aligned accurately without tilting.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view showing the overall configuration of an image forming and post-processing apparatus applicable to the present invention, FIG. 2 is an external perspective view showing a discharge section to a discharge tray, and FIG. 3 is a tray in a tray shift swing mechanism. FIGS. 4 and 5 are plan explanatory views showing the fitted state; FIGS. 4 and 5 are plan views and external perspective views showing the drive system of the tray shift swing mechanism; FIG. 6 is an external perspective view showing the paper ejection holding mechanism; 7 and 8 are side explanatory views and external perspective views showing the ejection tray up and down mechanism, Fig. 9 is a schematic side explanatory view showing the schematic structure of the ejection processing system, and Figs. 10A, BC and 10. 11 is a front explanatory view and a bottom explanatory view showing the schematic structure of the stapler, FIG. 12 is a side view showing the mounting structure of the stapler, and FIG. 13 is an external perspective view of the ejecting device.
4 is a sectional view taken along the line BB in FIG. 10A, FIG. 15 is an enlarged side view of the staple ejecting section, and FIG. 16 is a block diagram showing a control system for carrying out the present invention. Explanation of symbols 100-Finisher-219-Paper discharge roller 217.218-Jogger fence 229-Discharge heald 25C1-Guide plate M22
Belt drive motor 246, 247--Reference fences 250a, 246a, 247a--Rear end abutment part 288
28!13--Spring 291-Held 290a-Pulley 1--Shift sorting part n-Stapler-■81.
Staple part

Claims (5)

[Claims] (1) In an image forming post-processing device that binds and binds transfer sheets discharged from an image forming apparatus using a staple unit, the staple unit includes a transfer paper receiver and a stapler that staples the transfer papers on the transfer paper receiver. A reference fence and a jogger fence are provided for aligning the transfer paper on the transfer paper receiver in a transfer paper conveyance direction and a direction perpendicular to the transfer paper conveyance direction, respectively, and the jogger fence and the reference fence are independent of each other. An image forming post-processing device characterized in that the image forming post-processing device moves as shown in FIG. (2) In the first aspect, the jogger fence is provided so as to be controlled to move independently of the stapling device, and
The image forming post-processing device is characterized in that the reference fence is provided with an engaging portion that fits into the stapling device and transmits the moving force of the stapling device to the reference fence. (3) In claim 2, the two symmetrically arranged movable reference fences that perform transfer paper alignment processing in the transfer paper conveying direction are engaged with the jogger fence in a separate and independent state. An image forming post-processing apparatus, characterized in that the image forming post-processing apparatus moves in accordance with the movement of the stapling device by a section, and is biased toward a central portion of conveyance by a biasing means connected thereto. (4) In claim 2, the two symmetrically arranged movable reference fences that execute transfer paper alignment processing in the transfer paper conveying direction are engaged with the jogger fence in a separate and independent state. The image forming post-processing device is characterized in that the image forming post-processing device moves in accordance with the movement of the stapling device, and based on the movement of one reference fence, the other reference fence moves in conjunction with the movement of the other reference fence in the opposite direction. (5) In claim 1, the two symmetrically arranged movable reference fences that perform transfer paper alignment processing in the transfer paper conveyance direction are controlled to move independently of the stapling device. What is claimed is: 1. An image forming post-processing device characterized in that the image forming post-processing device is provided as shown in FIG.