JPH02279389A - Image forming post-treatment apparatus - Google Patents

Abstract

PURPOSE:To enhance workability and to achieve miniaturization by providing a binding position control apparatus moving a stapler to a predetermined position on the basis of the size of recording paper and an image forming direction. CONSTITUTION:A detection plate 30a is provided to the upper end part of a stapler slider 30 and, by shielding the detection part of the home position sensor 40 provided on a main body side by the detection plate 30a, the home position of a stapler S is detected. A stepping motor 39 for moving the stapler is mounted to a side panel 41 and the midway part of the belt 38 driven by the stepping motor 39 is fixed to a stapler slider 30 to reciprocally move the stapler slider 30 in a left and right direction. By this method, workability is enhanced and the apparatus is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming post-processing device that performs post-processing such as stapling on recording paper discharged from an image forming apparatus such as a copying machine or a printer.

[Prior art] Conventionally, for example, Japanese Patent Application Laid-Open No. 62-20046, Japanese Patent Application Laid-open No. 62-20046
2-191375, JP 62-176246, JP 62-290669, JP 59-
As described in Japanese Patent Application Laid-open No. 82263 and Japanese Patent Application Laid-open No. 101268/1982, recording paper sent out from an image forming apparatus is stored in a staple tray, the recording papers are stapled, and a bundle of the bound recording papers is assembled. Image post-processing devices are generally known that are configured to drop into a lower tray and be ejected.

[Problems to be Solved by the Invention] In such a conventional image formation post-processing device, when a post-processed stack of recording paper is taken out.

There is a problem in that the stable tray positioned above becomes a nuisance, and the stack of recording sheets cannot be taken out without bending at the waist during the taking-out operation, making the work painful.

In addition, the inventor of the present application has already proposed a device that discharges a bound stack of recording paper onto a tray located in the upper part, but in this proposed device, in order to position the tray in the upper part, one A paper discharge path is provided, which requires a large space.

Furthermore, in conventional devices, the binding location by the stabilizing device is determined at a fixed position, and in particular, depending on the direction of image formation on the recording paper, that is, the direction of writing force, stabilization may be performed at a location different from the original binding position. There is a problem with putting it away.

First, the present invention solves the problems of the conventional devices described above, and provides an image forming and post-processing device that can be easily operated without bending the body, has good workability, and is compact. A second object of the present invention is to provide a post-image forming process that solves the problems of the conventional apparatus described above and allows stabilization to be performed at an appropriate location corresponding to the recording paper. The purpose is to provide equipment.

[Means for Solving the Problems] In order to achieve the above object, the invention described in claim 1 provides an image forming post-processing device for binding recording paper discharged from an image forming apparatus. an ejection tray disposed in the upper part of the processing device frame; a staple section disposed in the lower part; an inlet for recording paper ejected from the image forming apparatus; and a first path from the inlet to the ejection tray. .

A second path from the inlet to the stapling section, and an ejection device directly connected to the ejection tray so as to eject the bound stack of recording sheets, the stapling section comprising: The recording paper receiver is provided with a stapling device for stapling the recording papers on the recording paper tray, and a stapling position control device for moving the stapling device to a predetermined position based on the size of the recording paper and the image forming direction. have.

In the invention set forth in claim 2, in the invention set forth in claim 1, the binding position control device has a first control mode in which the upper left corner of the recording paper is bound and a first control mode in which the upper right corner of the recording paper is bound. The present invention is configured to include a control circuit that automatically sets the second control mode for binding.

[Function] In the means having the configuration described in claim 1, the bound stack of recording paper is directly discharged from the staple section without going through a passage, and the size and size of the stack of recording paper are The most appropriate binding position is selected by the binding position control device in accordance with the direction of use.

Furthermore, in the means having the structure recited in claim 2, in addition to the functions of the means recited in claim 1, two binding controls are provided in accordance with the size and direction of use of the stack of recording sheets. One of the modes is selected to perform stabilization.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

The finisher shown in FIG. 1 is installed on the side of the image forming apparatus (not shown), and the shift sorting section on the upper side is composed of a section I and the staple section ■ on the lower side. .

First, in the shift sorting section I, a plurality of conveyance rollers and driven rollers that follow the conveyance rollers are arranged on the conveyance path. The rotation axis of the first conveyor 0101 is the first timing belt 10
4 to the rotating shaft of the transport drive motor ML, thereby obtaining driving force. The rotation axis of the first conveyance roller 101 is connected to the rotation axis of other conveyance rollers, the rotation axis of the discharge roller 102, and also the rotation axis of the gathering fur brush 103 by a second timing belt (not shown). It is designed to drive these.

In addition, single-sheet detection sensors SNI and SN2 are provided immediately before the most upstream conveying roller 101 and the discharging roller 102, so that the leading and trailing edges of the conveyed paper are detected. . A switching pawl 105 is disposed downstream of the first conveying roller 101, and by the action of a driving solenoid 230 and a spring (not shown), the stapling section (2) and shift sorting (described later) in the conveying direction are controlled by the section (2). 1 part can be changed in any direction.

As shown in FIGS. 2, 3, and 4, near the paper ejection port, a fur brush 103 for paper collection is arranged directly below the paper ejection roller 102, and the paper ejection tray 10
The recording paper dropped onto the abutment plate 10 due to its rotation.
6 and abut against an abutting plate 106, thereby aligning the trailing edges of the recording sheets.

Next, in the shift drive mechanism, as shown in FIG. 3, the abutment plate 106 and the discharge tray 107 are formed with unevenness, and are configured to mesh with each other. As a result, the output tray 107 can be freely moved in the vertical direction (perpendicular to the paper in FIG. 3) with respect to the abutting plate 106, and is linked to the output tray 107 in the front-rear direction (in the left-right direction in the paper in FIG. 3). It is about to be moved. In FIGS. 4 and 5, the abutment plate 106 is connected to a shaft-shaped shift guide 111 via a bearing 111 on the side of the main body different from the ejection tray 107.
It is supported by and is configured to be freely movable in the front and rear directions. Further, as shown in FIG. 5, the abutment plate 106 is eccentrically connected to the crank 113 via an arm rod 115. The above crank 113
The rotation axis of is arranged parallel to the central axis of the copying machine. A removable bracket 11 vertically protrudes from the side plate 100
A gear train 114 is arranged at 6, and this gear train 114
The crank 113 is connected to the shift motor M2 via. By driving the shift motor M2, the crank 113 is moved one step, and the abutment plate 106 is reciprocated in the front and rear directions due to its eccentric rotation. Therefore, the discharge tray 107, which is restricted in the front-rear direction with respect to the abutting plate 106, is also moved back and forth in the front-rear direction accordingly.

Furthermore, the abutment plate 106 has two shift detection plates 1 arranged at an interval approximately equal to the amount of movement by the crank 1-13.
18 is installed protrudingly.

When the shift detection sensor 117 facing the abutment plate 106 detects this shift detection plate 118, it is detected that the abutment operation and the tray shift operation have been moved by one stroke.

Further, as shown in FIG. 6, the presser roller 108 is
is supported so as to be vertically movable and rotatable, thereby pressing the upper surface of the discharge tray 107 and the stacked recording sheets with its own weight. The recording paper slips under the presser roller 108 by gravity and the conveying force of the paper gathering fur brush 103 and is abutted against the abutment plate 106. When the discharge tray 107 is shifted by the pressing force of the pressing roller 108, the recording paper is prevented from shifting.

A paper surface detection sensor SN3 is arranged on the main body side facing the presser roller 108. When the position of the presser roller 108 is raised due to accumulation of recording paper, the paper surface detection sensor SN3 detects the presser roller support bracket 120. , and it is known that the paper surface or the top surface of the output tray has reached a specified height.

Further, in the vertical movement mechanism, as shown in FIGS. 7 and 8, the discharge tray 107 is fixed to a tray support stand 110. The tray support stand 110 has a bearing 1
It is supported by a tray vertical movement table 109 via a tray 10a so as to be movable back and forth.

Therefore, as described above, the shift 1 by the abutting plate 106
- The operation can be performed by the tray vertical movement table 109. As shown in Figure 1,
The tray vertical movement table 109 is connected to the third timing belt 12
Fixed to 0. The third timing belt 120 is provided one each on the outside of the front and rear side plates 1°0,
Each of the vertical drive pulley 121 and the driven pulley 1
Kake has been passed on the 22nd. Both of the vertical drive pulleys 121 are fixed to a vertical drive shaft 123 that passes between the side plates, and a gear 124 containing a one-way clutch is attached to the vertical drive shaft 123. The one-way clutch is configured to transmit force in the direction of lifting the discharge tray 107 to the vertical drive shaft. The gear 124 is a gear train, a worm wheel 1
25, and is connected to the vertical drive motor M3 via a worm 126 and the like. Further, a bearing 127 is attached to the side surface of the side plate 100 of the vertically movable support base 109, and the vertical guide rail 1 fixed to the side plate 100
28 prevents the ejection tray from falling due to the rotational moment due to the vertical movement guide and the weight of the ejection tray.

With the above-described configuration, the lowering of the discharge tray 107 is normally stopped by locking the holding force of the worm 126 and the one-way clutch. Further, when the vertical movement drive motor M3 is rotated in the direction in which the discharge tray 107 is raised, the one-way clutch is locked, the pulleys 121 and 122 are rotated, and the discharge tray 107 is thereby raised. When the vertical drive motor M3 is rotated in the downward direction of the discharge tray 107, the one-way clutch becomes free, and the discharge tray 107 is thereby moved downward by its own weight.

Further, as shown in FIG. 9, the timing belt 1
An upper limit sensor SN4 and a lower limit sensor SN5 are installed inside the output tray 1-07 so as to face the output tray 1-07, and the upper and lower limits of the output tray 107 are detected by sensing the upper and lower detection plates 129, respectively. I'm in the middle of the day. When the ejection tray 107 is lowered, the one-way clutch is in a free state, so the waste power of the vertical drive motor M3 is not transmitted to the ejection tray 107, and even if the ejection tray 107 is stopped by an external force when it is lowered, the vertical movement will continue. By idling the drive motor M3, troubles such as motor overload and fingers being pinched are prevented.

When the copy operation is started, the shift motor M2 is driven and the crank 113 is rotated, so that the crank 1
1.3, the abutting plate 106 is moved in the front-back direction via the rod 115. Accordingly, the discharge tray 107, which is supported in a manner that engages with the irregularities of the temporary abutment 106 and is movable vertically and in a heavy manner, is moved in the front-rear direction and a shift operation is started. and one shift detection plate 118 that the shift 1 sensor 117 detected before the start of the shift operation.
When the other shift detection plate 118 is detected, the shift motor M2 is stopped in response to the signal, and the shift operation is completed. After the shift operation is completed, the vertical movement motor M3 is driven in the tray raising direction, and the discharge tray 107 is raised. After starting the vertical movement, presser roller 108
A part of the support bracket 120 is the paper surface detection sensor SN.
3 is detected, the vertical movement drive motor M3 is stopped by the signal, and the raising of the discharge tray 107 is completed.

The recording paper discharged from the main body is received by a conveying roller 101 at the same linear velocity as the discharge speed from the main body.

As the recording paper is being conveyed, when the first paper detection sensor - SNI detects the trailing edge of the recording paper, the linear velocity is increased to a value greater than the main body ejection speed of the recording paper, and the leading edge of the recording paper is moved to the second After a predetermined time has elapsed since the recording paper was detected by the paper detection sensor SN2, the linear velocity is returned to the main body discharge speed of the recording paper, and then the recording paper is discharged to the discharge tray 107. Ejection 1 ~ Ray 1.0
The recording paper discharged to 7 is moved by gravity and fur brush 10
The rear end alignment is performed by crawling under the presser roller 108 and abutting against the abutment plate 106 by the conveyance force generated by the rotation of the roller 3.

At this time, when the number of copies exceeds the specified number, the shift motor M2 is driven by the signal and a shift operation is started. - When the stroke shift is completed, the shift motor M2 is stopped.

By this operation, the stacking position of the recording sheets on the ejection tray 107 is changed, and the recording sheets are sorted. When the series of copying operations is completed and the last sheet is ejected, the vertical movement motor M3 is driven in the downward direction by the signal, and the operation is ended after the ejection tray 107 has been lowered by a specified amount. It has become.

When a certain amount of recording paper is accumulated and the paper surface approaches the paper ejection tray, a part of the presser roller support bracket 120 detects the paper surface detection sensor S.
When detected by N3, the vertical movement drive motor M3 is driven in the tray lowering direction by the signal, and the worm 12
The holding force of 6 and the lock of the one-way clutch are released, and the discharge tray 107 is lowered by its own weight.

When the paper surface is lowered by lowering the output tray 107, a part of the presser roller support bracket 120 is no longer detected by the paper surface detection sensor SN3, and the vertical movement drive motor M3 is stopped by that signal, and the worm 12
The holding force of No. 6 and the locking of the one-way clutch act to stop the discharge tray 107. As the discharge tray 107 is lowered, the upper and lower detection plates 129 detect the lower limit sensor SN5.
In the stapler moving mechanism in the stapler section (3), the vertical motion immediate motor M3 is stopped by a signal when detected by the stapler, and the ejection tray 107 is prevented from being lowered any further. , as shown in FIGS. 1, 10, 11 and 12, the stapler 8 is.

It is fixed to the stapler stand 31. The stapler stand 31 has a guide hole 3 of the stapler slider 30.
0b via a guide pin 32 so as to be movable in the 0 direction in FIGS. 1-2. Further, a shaft 44 is fixed to the back side of the stapler stand 31, and a guide roller 34 is rotatably attached to the shaft 44. The upper portion of the stapler slider 30 includes both side plates 41.
42 is attached so as to be slidable in the direction perpendicular to the paper of FIG. The stapler slider 30 is rotatably abutted on the surface of the stay 43, thereby locking the stapler slider 30 in the rotational direction.

Further, a guide cam 35 is fixed to the stay 43, and the guide roller 34 is in rolling contact with a cam surface formed at the upper end side of the guide cam 35. This allows the stapler slider 30 to be reciprocated in the direction shown in FIG. At this time, the central portion of the guide cam 35 is formed to be concave downward, and the stapler slider 30 is moved along this concave portion.

A detection plate 30 is provided at the upper end of the stapler slider 30.
The home position (HP) of the stapler 8 is detected by the detection Fi 30 a shielding the detection part of the home position sensor 40 provided on the main body side. Side plate 41
A stepping motor 39 for moving the stapler is attached to the , and a middle portion of a belt 38 driven by the stepping motor 39 is fixed to the stapler slider 30, so that the stapler slider 30 moves in the left-right direction in FIG. It is designed to be moved back and forth.

Next, in the moving mechanism of the jogger fence, the 10th
As shown in FIG.
A left slider 8 and a right slider 7 are attached to a jogger fence rod 9 that is passed between them so as to be able to move back and forth. Fences 5 are each fixed. The left jogger fence 6 and the right jogger fence 5 have the function of aligning the stack of sheets in the stapling operation, and also have the function of aligning the paper stack 53 from the vicinity of the discharge roller 3.
By extending to the vicinity of , it has a function as a guide member when discharging the stapled paper bundle. At the lower ends of the left jogger fence 6 and the right jogger fence 5, rear end fences 6a and 5a are provided to hold the lower end edge of the stabilized paper bundle.

A middle portion of the belt 10, which is immediately moved by the Jikogar fence spacing motor 11, is fixed to the left slider 8 and the right slider 7. The left slider 8 and the right slider 7 are fixed to different sides of the belt 10, respectively, so that the left jogger fence 6 and the right jogger fence 5 are symmetrically reciprocated in the left-right direction in FIG. There is. Guide rollers 15 are attached to the upper rear sides of the left jogger fence 6 and the right jogger fence 5, and the guide rollers 15 roll onto guide stays 16 that are hooked to the tops of both side plates 41 and 42. It is abutted like this. The left slider 8 is provided with a detection plate 8a, and this detection plate 8a blocks the detection part of the home position sensor 14 provided on the main body side, thereby determining the home position of both jogger fences 6.5 ( HP) is now detected. As shown in FIG. 15, a curl presser 64 is provided at the lower end of the left jogger fence 6 and the right jogger fence 5, which suppresses buckling when loaded on the stable tray. ing. The curl presser 64 is made of an elastic member such as a polyester film.

Next, in the ejection belt mechanism, as shown in FIGS. 10, 13, and 14, the drive shaft 24 is attached to the upper end portions of both side plates 41, 42 so as to cross over it, and A drive pulley 18 is fixed approximately at the center of the drive shaft 24. In addition, a fixed pulley is provided at the lower part of the two-way pulley 18,
An endless discharge belt 17 runs between these pulleys 18, 19. The middle part of the discharge belt 17 is hung on the idler pulley 47, and
The belt is guided by a guide plate 25 placed inside the belt to prevent deflection and displacement. A belt drive motor 22 is fixed to the side plate 41, and a pulley 21 is attached to the output shaft of the belt drive motor 22, and a pulley 20 is attached to one end of the female drive shaft 24. A belt 23 is passed between the two, so that belt force is transmitted. In addition, a protruding pawl 46 is provided in the middle of the surface of the discharge belt 17 so as to grasp the paper stack from below. As shown in FIG. 1, a home position sensor 48 for detecting the position of the claw 46 is provided on the inner side of the discharge belt 17, and the home position sensor 48 detects the home position (HP
) is now detected. The conveyance speed v2 of the discharge belt 17 is set to be slightly larger than the paper discharge linear velocity v1 of the paper discharge roller 3 (VZ≧Vl). This prevents the paper from being ejected together with the bound stack of papers.

Each mechanism of such a stapler is configured to form one unit, and guide rails 51, 5
2 so that it can be pulled out toward the front.

As shown in FIG. 1, the paper ejection tray mechanism has a base portion of a paper ejection tray 53 fixed on a tray stand 54. As shown in FIG. A guide roller 56 is rotatably attached to the tray stand 54, and when the guide roller 56 is engaged with a guide rail (not shown), the paper discharge tray 53 is moved in the vertical direction together with the tray stand 54. It looks like this.

Further, the tray stand 54 is biased upward by a lift spring 55.

Driving force is transmitted from the transport motor 59 to the transport rollers 60, 61, and 62 through a belt (not shown), and a driving force is also transmitted to the discharge roller 3 from the transport motor 59 by a belt (not shown). . Further, fur brushes 1a and 1b are attached to the rotating shaft 2 of the discharge roller 3, and these fur brushes 1a and 1b are attached to the rotating shaft 2 of the discharge roller 3.
and 1b are adapted to be rotationally driven in synchronization with the discharge roller 3. The above fur brush la.

The bristles 1b are in contact with guide plates 26 and 27. The guide plates 26 and 27 are provided with protruding ribs 26a that hold the lower edge of the stapled paper bundle.

27a'IJ< is provided, and the protruding rib 2
6b and 27b are formed to protrude to the front side.

Therefore, the recording paper is bent toward the back side and deformed into a wave shape by the pressing force of the protruding ribs 26b, 27b and the bristles of the fur brushes la, 1b, thereby preventing the paper bundle from buckling. It is designed to have a certain waist.

Furthermore, as particularly shown in FIG. 15, the protrusion of the guide plate 67 of the paper ejection section from the center of rotation of the paper ejection roller 3 is set to be larger than the amount of protrusion of the paper being fed. Even if the recording paper does not fall below the fur brushes la, lb and enters between the upper guide plate 67 and the fur brushes la, lb, the fur brushes la, lb
The trailing edge of the recording paper is scraped downward by the tips of the bristles.

The recording paper processing operation will be explained below. First, the stapling operation is selected using the staple key, 1 the original (N sheets) is set on the document feed tray (RDH) (not shown), and the number of copies (K copies) is input using the 10 key, and then the copy button is pressed. When pressed, a copy size signal is received from the main body of the copying machine, and it is determined whether the size can be inserted into the staple section. If the size is such that it can be placed in the staple section, it is determined whether the claw 46 of the discharge belt 17 is at the home position (I-1, P). In other cases, the switching guide member 45 remains turned off and the recording paper is advanced toward the conveyance path of the shift l~lay unit section, and if it is not at the home position, it is returned to the home position by the belt drive motor 22. . It is detected whether or not the stapler 8 is at the home position. If the home position is detected, the stapler 8 is moved to a predetermined location by the size signal, and if the home position is not detected, the home position is detected. After the stapler 8 is moved until the home position is detected, the stapler 8 is moved to a predetermined location in response to a size signal.

Also, jogger fences 5 and 6 are at home position (H,
If the home position is detected, the jogger fences 5 and 6 are moved to a predetermined position by the size signal, and if the home position is not detected, until the home position is detected. After being moved and detecting the home position, the jogger fences 5 and 6 are moved to a predetermined position based on a size signal. The moving location at this time is amm on one side and 2 anyn on both sides from the size width.

When the leading edge of the recording paper is detected by the entrance sensor SNI, the switching guide member 105 is switched to the staple tray by the switching solenoid 230 for guidance.

When the leading edge of the recording paper passes through the entrance sensor SNI, it is fed at high speed. However, when the recording paper is straddled between the copying machine and the copying machine, the conveyance speed is the same as that of the copying machine.

After a predetermined time after passing through the entrance sensor SNI, that is, the time until passing through the switching guide member 105, the switching solenoid 230 is turned off. The recording paper is discharged to the stable tray by the discharge roller 3, and while the recording paper is being discharged, the electric charge on the recording paper is removed by a static elimination brush 63 fixed to the upper guide plate 67 of the paper discharge section. It has become.

The paper discharge roller 3 is provided with a flap, which bends the recording paper into a wave shape and gives it stiffness. Note 8: When the rear end of the paper passes through the discharge roller 3, the fur brush la on the same axis is removed.

The rear end of the recording paper is pushed down by 1b, and brought so as to abut against the rear end fences 26a, 27a and the rear end fences 5a, 6a provided on the jogger fence 5.6. After a period of time until the sheet passes through the lower sheet discharge sensor 50, the drive motor 11 of the jogger fences 5 and 6, which had been on standby until then, rotates forward and reverse once or twice.

As a result, the recording sheets are aligned in the width direction, and after such paper alignment is performed, they are returned to the standby position.

This paper alignment operation is repeated for each recording paper until a one-job end signal is issued from the main body of the copying machine.

Next, when a job end signal is issued and received from the copying machine main body, the above-described operation is performed again, and then the recording paper stack is held down in the width direction by the jogger fences 5 and 6. Then, the drive motor 223 in the stapler 8 is started to be driven, and the stack of recording sheets is stapled. 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 5.6 is moved to a position slightly away from the paper bundle after the binding operation is completed. If two or more locations are to be stapled, the stapler is moved to a predetermined position by the stapler moving motor 39, the stapling operation is performed again, and after the stapling operation is performed, the stapler is returned to the initial position. At this time, the discharge belt 17 is rotated in the direction shown in FIG.
6, the rear end of the recording paper bundle is pushed up and the recording paper bundle is discharged to the paper discharge tray 53 in the same direction as the discharge direction to the stable tray.

It is determined whether or not the last set number of copies (K copies) has been completed, and when the stapler 8 is finished, the stapler 8 is moved to the home position, and if the stapler 8 is not yet completed, it is moved to the jogger fence to a predetermined position based on the size signal. 5 and 6 are moved, and the above-described operation is performed again.

In such a device, when the ejection tray 107 is moved up and down either when the power is turned on or when a mode is selected, the CPU first checks the output states of the upper limit sensor SN4, lower limit sensor SN5, and paper surface sensor SN3, and then moves the ejection tray 107 up and down. 107 is currently located. If the upper limit sensor SN4 and the paper surface sensor SN3 are turned on, the vertical movement drive motor M3 is turned on and the discharge tray 107 is lowered to the point where the paper surface sensor SN3 is turned off. If only the upper limit sensor SN4 is turned on, nothing is done. Upper limit sensor SN4, lower limit sensor SN5 and paper surface sensor S
If all N3 are turned off, the vertical movement drive motor M3 is turned on and the output tray 107 is raised to the point where the upper limit sensor SN4 or the paper surface sensor SN3 is turned on, and if the paper sensor SN3 is turned on, the paper surface sensor It is lowered until SN3 is turned off.

When only the paper surface sensor SN3 is turned on, the vertical movement drive motor M3 is turned on, and the paper surface sensor SN3
is turned off, and the output tray 107 is lowered until it is turned off. If only the lower limit sensor SN5 is turned on, it is determined that the recording paper on the output tray 107 is less than the loading capacity, a signal indicating that the paper is full is sent to the copying machine, the recording paper is removed, and the recording paper is removed from the copying machine. When a clear signal is received from the upper limit sensor SN, the vertical drive motor M3 is turned on and the upper limit sensor SN
4 or the output tray 107 is raised until the paper surface sensor SN3 is turned off. When the paper sensor SN3 is turned on, the ejection tray 1 is moved until the paper sensor SN3 is turned off.
07 is lowered.

When restarting in the same mode, after turning on the power, the same operation as when selecting the mode will be performed on the main unit's copy star 8.
It will be held in synchronization with issue 41.

During copying and at the end of copying, paper sensor SN3
is turned on, the vertical movement drive motor M3 is turned on, and the ejection 1 to lay 107 is turned on until the paper surface sensor SN3 is turned off.
is lowered. When this operation is repeated and the lower limit sensor SN5 is turned on, the output tray 10
At 7, a signal indicating that the recording paper is full is sent to the main body. If this operation overlaps with the tray shift operation, priority is given to the tray shift operation, the tray shift operation is put on standby during the shift operation, and is performed after shift 1 is completed. After the last sheet passes through the main paper ejection sensor 215, a finisher stop signal is sent, so this signal is received after the final sheet is ejected and ejected to the ejection tray 107.''
The second lower movement motor M3 is turned on, and the discharge tray 107 is lowered by a predetermined amount to facilitate copying.

Next, when the power is turned on, no shift operation is performed, and when a mode signal is received when a shift or Bruf motor is used depending on the mode selected, the shift motor M2 is turned on, the discharge tray 107 is moved, and the shift detection sensor 117 is turned on. When this happens, shift motor M2 is turned off. By this operation, the paper remaining in the ejection 1 to ray 107 and the paper for a new job are sorted. Such an operation is on standby during the tray up-and-down operation, and is performed after the tray up-and-down operation is completed. By doing this, even if the recording paper remains on the discharge tray 107, the recording paper is held down by the pressing roller 108, and the recording paper is prevented from shifting during shifting.

During copying and at the end of copying, a shift signal is sent when the last sheet of the copy set passes the main body sheet ejection sensor 215, and the finisher receives this signal and shifts the trailing edge of the last sheet past the sheet ejection sensor SNZ. The shift motor M2 is turned on after a predetermined period of time has passed, 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 on standby during the shift operation, and the tray up and down movement is performed after the shift is completed. By doing this, the paper is prevented from shifting due to shift 1.

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.

Next, the jogger fence operation will be explained. First, when the power is turned on and a mode is selected, the CPU checks the output states of the jogger home position sensor 14 and the tray paper presence/absence sensor 205, and executes the following operations. If only the jogger home position sensor 14 is turned on, nothing is done. Jogger home position sensor 14. If the tray paper presence/absence sensor 205 is turned on, a signal indicating that recording paper remains on the stable tray is sent to the main body. Jogger home position sensor 14 is off and tray paper presence sensor 2
05 is on, belt drive motor 2
2 is turned on, the recording paper on the stable tray is ejected to the paper ejection tray 53, and then the jogger drive motor 11
is turned on, the jogger fences 5 and 6 are moved toward the home position, and when the jogger home position sensor 14 is turned on, the jogger drive motor 11 is turned off. When only the jogger home position sensor 14 is turned off, the jogger drive motor 11 is turned on and the jogger fences 5 and 6 are moved toward the home position, and the jogger home position sensor 14 is turned on.
When the jog motor 11 is turned on, the jog motor 11 is turned off.

During copying, at the end of copying, and from copy restart 1 onward, if a paper size signal is received after the main unit starts copying, the jogger drive motor 11 is turned on and the jogger fences 5 and 6 are moved to make the paper size smaller than the paper width size. It is stopped at a position a predetermined distance in front of you and is on standby. Paper output sensor 5
When a predetermined period of time has elapsed after passing through zero, the jogger drive motor 11 is turned on, the jogger fence 5.6 at the standby position is moved to remove paper waste, and is returned to the standby position again. At this time, the jogger drive motor 11 rotates in the forward direction.
The reverse rotation is repeated once to several times, and thereby the jogger fences 5 and 6 are aligned in the width direction of the paper. Such an operation is performed every time the recording paper is discharged onto the stable tray.

When the last sheet of the copy set passes the main body sheet ejection sensor 215, a stable signal is sent, and upon receiving this signal, the last sheet of paper is ejected to the stable tray, and after the above-mentioned paper waste operation is performed, the paper is The jogger fence 5.6 is moved to a position where it holds down the width direction and is stopped. When the stabilization operation is completed, the jogger fences 5 and 6 are moved to a position slightly away from both ends of the paper in the width direction. When the Q paper bundle is discharged onto the paper discharge tray 53 by the discharge belt 17, the jogger fences 5 and 6 are returned to the standby position. By doing this, the paper is prevented from shifting during stabilization, and the jogger fences 5 and 6 are used as guides in the width direction when discharging the paper bundle.

After the above operations are repeated for several copies and the final stack of recording sheets is ejected onto the paper ejection tray 53, the jogger drive motor 11 is turned on and the jogger fences 5 and 6 are moved toward the home position. When the jogger home position sensor 14 is turned on, the jogger drive motor 11 is turned off.

When the power is turned on and the mode is selected for stapler operation, the one rotation sensor 210 and the staple presence/absence sensor 211
, the output state of the stapler home sensor 212 is CP.
It is checked by U and the following operations are executed.

If the tray discharge sensor 205 is turned on while the one-rotation sensor 240 is turned off, it is determined that there is a stapling failure, and a stapler abnormality signal is sent to the main body. When the tray ejection sensor 205 is in the off state, it is determined that the stapler has deviated from the home position due to jam processing, etc., and a blank stapler request signal is issued so that the stapler can blankly staple once and match the home position. Sent to the main unit.

When the staple presence/absence sensor 211 is in the OFF state, a stapler-no-staple signal is transmitted to the main body. If stapler home sensor 40 is on, nothing is done. When the stapler home sensor 40 is turned off and the one-rotation sensor 210 is turned on, the stapler moving motor 39 is turned on and the stapler 8 is moved toward the home position. When the stapler home sensor 40 is turned on, the stapler
Travel motor 39 is turned off. 1 revolution sensor 210
If it is turned off, it is determined that a stapling error or jam has been processed, and the printer waits in that state. When the one-rotation sensor 210 is turned on due to an artificial process such as blank firing, the stapler movement motor 39 is turned on and the stapler moves.
After the stapler home sensor 40 is turned on when the stapler is moved toward the home position, the stapler movement motor 39 is turned off.

When copying, at the end of copying, and at the time of restarting copying, after the paper size signal is received after the main unit starts copying, the stapler movement motor 39 is turned on and the stapler 8 is moved a predetermined amount to the position corresponding to the paper size. will be moved. Next, after the last sheet of the copy set passes the main body paper ejection sensor 215, a stapling 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 5 and 6 record it. When both ends of the paper stack in the width direction are pressed, the staple motor 223 is turned on to perform the stapling operation, and when the one-rotation sensor 210 is turned on, the staple motor 2 is turned on.
23 is turned off. In the case of the two-position binding mode, the stapler movement motor 39 is turned on and the stapler 8 is moved a predetermined amount according to the paper size, and then the stapler movement motor 39 is turned off to perform the second stabilization operation. It will be done. When stapling is completed, the stapler moving motor 39 is turned on, and when the stapler is returned to the first position by a predetermined amount, the stapler moving motor 39 is turned off. When such a stabilizing operation is repeated for several copies and the final stack of recording sheets is stapled, the stapler movement motor 39 is turned on to move the stapler 8 toward the home position, and the stapler home sensor 40 When is turned on, the stapler moving motor 39 is turned off.

Next, the operation of the discharge belt will be explained.

When the power is turned on and when selecting a mode, the signals from bell 1 to home sensor 48.1 to Ray ejected paper presence sensor 205.
The CPU checks the output state of the one-rotation sensor 210 and performs the next operation. When the bells 1 to 1 and the sensor 48 are turned on and the one-way sheet discharge sensor 205 is turned off, nothing is done. If the bell 1-home sensor 48.1-ray paper ejection presence/absence sensor 205 are both turned off, it is determined that the ejection belt 17 has not returned to the home position, and the belt drive motor 22
is turned on, the discharge bells 1 to 17 are operated, and when the belt home sensor 48 is turned on, the belt opening motor 22 is turned off. If the bell 1 to home sensor 48 are turned off and the L-ray paper ejection presence/absence sensor 205 is turned on, it is determined that there is a failure in ejection, and if the one-rotation sensor 210 is turned on, the belt drive motor 22 is turned on. Then, the discharge belt 17 is operated. When the bell 1 to home sensor 48 is turned on after the 1 to ray paper discharge presence/absence sensor 205 is turned off, the belt drive motor 22 is turned off.

If the one-rotation sensor 210 is off, it is determined that the ejection failure is due to a staple failure or the like, and the process waits until the stack of recording sheets on the staples 1 to rays are removed. After the recording paper stack is removed, the bell 1 to the drive motor 22 are turned on to operate the discharge belt 17, and when the belt home sensor 48 is turned on, the belt drive motor 22 is turned off.

At the time of copying and at the end of copying, the last copy cent paper is ejected onto the staple tray, and when the stapler 8 performs a binding operation on the recording paper stack, the one-rotation sensor 210 is turned on to indicate that the staple has been successfully stapled. This is confirmed. Thereafter, the belt drive motor 22 is turned on, the discharge belt 17 is operated, and the stapled stack of recording sheets is discharged onto the paper discharge tray 53. When the belt home sensor 48 is turned on, the belt drive motor 22 is turned off. Such operations are repeated for each copy.

In the shift tray system of the transport system, a finisher start signal is sent when the copying machine starts copying, so when that signal is received, the transport motor 220 is turned on and the low speed operation is reduced to the main body linear speed. When the recording paper is ejected from the main body and the entrance sensor SNI is turned on, a timer is set to monitor whether the recording paper passes the entrance sensor SNI within a predetermined time and detect a jam. It will be done. When the trailing edge of the recording paper passes through the entrance sensor SNI and the entrance sensor SN1 is turned off, the transport motor 220 is switched to high-speed operation and the transport speed is increased. Also, a timer is set, and a jam is detected by monitoring whether or not the leading edge of the recording paper turns on the paper discharge sensor SN2 within a predetermined time.

When a predetermined period of time has elapsed after passing the entrance sensor SNI, the transport motor 220 is returned to low-speed operation to prepare for the next recording paper to be transported. When the paper discharge sensor SN2 is turned on by the recording paper, a timer is set, and it is monitored whether the recording paper passes within a predetermined time to detect a jam.

By repeating these operations, in the shift tray mode, when a shift signal is received, 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. When the final recording paper is ejected from the main body, a finisher stop signal is sent, so when that signal is received.

When a predetermined period of time has elapsed after the last recording paper passes the paper discharge sensor SN2, the conveyance motor 220 is turned off.

Next, in the staple tray system, when the main body of the copying machine starts copying, a finisher start signal is transmitted, so when that signal is received, the transport motor 220 is turned on and the low speed operation is changed to the linear speed of the main body. done at the same speed. When the recording paper is ejected from the main body and the inlet sensor SN1 is turned on, the switching solenoid 230
Then, the lower conveyance motor 226 for low speed operation is turned on, a timer is set, and a jam is detected by monitoring whether the recording paper passes the entrance sensor SNI within a predetermined time. When the trailing edge of the recording paper passes through the entrance sensor SNI and the entrance sensor SNI is turned off, the lower transport motor 2
26 is switched to high-speed operation and the conveyance speed is increased.

Further, a timer is activated and a jam is detected by monitoring whether or not the leading edge of paper a turns on the lower paper discharge sensor 50 within a predetermined time. When a predetermined time has elapsed after passing the entrance sensor SNI, the switching solenoid 23
0 is turned off. When the lower paper ejection sensor 5° is turned on by recording paper, a timer is set, and a jam is detected by monitoring whether or not the recording paper passes within a predetermined time. When a predetermined time has elapsed after the recording paper passes the lower paper discharge sensor 50, the lower conveyance motor 226 is switched to low speed operation.

When a stable signal is received by repeating this operation, a stable OK signal is sent to a high level after a predetermined period of time has elapsed after the last sheet of the copy set has passed the lower paper ejection sensor 50, and the shift is started. The timing at which the action is performed is measured.

When the final recording paper is ejected from the main body, a finisher stop signal is sent. When this signal is received, the conveyance motor 220 is activated after a predetermined period of time has elapsed after the final recording paper has passed the ejection sensor 50. And the lower transport motor 226 is turned off.

[Effects of the Invention] As mentioned above, according to the invention described in claim 1, the work can be easily done without bending the body, so the workability is good, and there is no unnecessary waste. Since the paper path can be eliminated, it is possible to downsize the image forming and post-processing apparatus, and it is also possible to stabilize the recording paper at an appropriate location corresponding to the recording paper.

According to the invention described in claim 2, in addition to the effect of the means described in claim 1.

It is possible to automatically perform stabilization at an appropriate location corresponding to the recording paper.

[Brief explanation of drawings]

Fig. 1 is a side explanatory view showing the overall configuration of a finisher in an embodiment of the present invention, Fig. 2 is an external perspective view showing the ejection section from ejection I to the tray, and Fig. 3 is a tray shift swing mechanism. An explanatory plan view showing the tray fitted state in
FIGS. 4 and 5 are plan explanatory 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, and FIGS. 7 and 8 are Side view and external perspective view of the paper ejection tray up and down mechanism, No. 9
The figure is a schematic side view showing the general structure of the paper discharge processing system, Figures 10 and 11 are front and bottom views showing the general structure of the stapling unit, and Figure 12 is the installation of the stapler. A side explanatory view showing the structure, FIG. 13 is an external perspective view of the discharge device, and FIG. 14 is taken from B-B in FIG. 10.
The line sectional view and FIG. 15 are enlarged side explanatory views of the stable discharge section. ■...Shift sorting department, ■...Stapling department, S...
... Stapler - 1la, lb... Fur brush, 3
...Paper ejection roller, 5,6...Jigo Garfence,
17... Ejection belt, 26.27... Guide plate, 3
5... Guide cam, 53... Output tray, 103...
・Fur brush for paper gathering, 105...Switching claw, 10
7... Ejection tray, 108... Presser roller. 52 units (1 person) Maximum 7 Q ru δ area %q area 4σ figure maximum μ

Claims (1)

[Scope of Claims] 1. In an image forming post-processing device that binds recording paper ejected from an image forming device, the image forming post-processing device has an output tray disposed in an upper part of the machine frame and a discharge tray disposed in a lower part. a stapling unit, an inlet for recording paper discharged from the image forming apparatus, a first passage from the inlet to the output tray, a second passage from the entrance to the stapling unit, and a stapled stack of recording paper. an ejection device directly connected to the ejection tray so as to eject the paper; An image forming post-processing apparatus comprising: a stapling position control device that moves the stapling device to a predetermined position based on the size of recording paper and the image forming direction. 2. The binding position control device has a control circuit that automatically sets a first control mode for binding the upper left corner of the recording sheets and a second control mode for binding the upper right corner of the recording sheets. The image formation post-processing device according to item 1.