JPH04173192A - Apparatus for post-treatment of recording paper - Google Patents

Abstract

PURPOSE:To efficiently discharge a stapled recording paper bundle to a paper discharge tray by temporarily interrupting operation when the number of the recording papers of the stapled recording paper bundle discharged to the paper discharge tray and the number of copies of the stapled recording paper bundles become predetermined quantities. CONSTITUTION:An operator of sets a manuscript to an RDH 206 and inputs the number NB of copies to be prepared by a ten-key. When a copy start key is pushed, the manuscript is fed to contact glass by the RDH 206 to be copied. At this time, the number NB' of copies capable of being placed on a paper discharge tray 53 is determined on the basis of the number NK of recording papers and the number NB of copies to be prepared counted by the RDH 206 and, at the time of NB'<NB, copy work is carried out as it is and, at the time of NB'>NB, copy work is temporarily interrupted when the number of copies placed on the paper discharge tray 53 becomes NB, to perform warning display. At the time of restarting, the recording paper bundle on the paper discharge tray 53 is removed and the start key is pushed. Operation is completed at the time of NS=NB, that is, at the point of time when the number of actually prepared copies becomes the scheduled number of copies.

Description

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

[Conventional technology]

2. Description of the Related Art Various recording paper post-processing devices have been proposed that perform bookbinding by aligning and stapling the end faces of a stack of recording papers on which images have been recorded, which are discharged from an image forming apparatus.

In such a recording paper post-processing device, stapled stacks of recording paper are stacked on the output tray, but there is a limit to the stacking height, and if the height is exceeded, the stack of recording paper will stack up on the output tray. If the output port is blocked, the next stack of recording paper cannot be output to the output tray, resulting in a jam.

To prevent this, a method may be considered in which the number of recording sheets is counted and the stapling operation is temporarily interrupted when a predetermined number of sheets is reached.

[Problem to be solved by the invention]

However, even if the number of recording sheets is small, if the number of copies is large, the thickness of the stack of recording sheets increases by the amount of staples. For example, in 2 copies bound with 10 sheets and 10 copies bound with 2 sheets, even though the number of recording sheets is the same, when stacked, the 10 copies bound with 2 sheets becomes more expensive.

Therefore, there is a problem in that the height (thickness) of the stapled stack of recording sheets cannot be accurately detected by controlling simply by counting the number of recording sheets.

The present invention has been made based on such a background, and an object of the present invention is to provide a recording paper post-processing device that can efficiently discharge a stapled stack of recording paper to a paper discharge tray.

[Means to solve the problem]

” The second purpose is to staple the recording paper ejected from the image forming apparatus in the recording paper post-processing device, when the number of stapled recording paper stacks and the number of copies discharged to the paper output tray reach a predetermined number. , is achieved by first means comprising control means for temporarily suspending the operation.

Furthermore, the second object is achieved in the first means by a second means for outputting a command to temporarily suspend the operation from the control means when the amount of staples used reaches a predetermined value.

[Effect]

According to the first means, when the number of recording sheets and the number of copies reach a predetermined number, the control means issues a command to interrupt the operation (stapling operation or copying operation of the image forming apparatus main body example) for - hours. .

According to the second means, the above-mentioned command is issued based on the amount of staples used in addition to the number of recording sheets and the number of copies.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The finisher illustrated in FIG. It is configured.

First, in the shift sorting section (2), a plurality of conveyance rollers and driven rollers are arranged on the conveyance path. 1st
The rotation shaft of the transport roller 101 is connected to the rotation shaft of a transport drive motor M1 via a first timing heald 104, thereby obtaining driving force. The rotation axis of the first conveyance roller 101 is connected to the rotation axis of the other conveyance rollers, the rotation axis of the discharge roller 102, and the fur brush 1 by a second timing held (not shown).
It is also connected to the rotating shaft of 03 and drives them.

In addition, an entrance sensor SNI is provided immediately before the most upstream conveyance roller 101, and the discharge roller 102 is provided with an inlet sensor SNI.
A paper discharge sensor SN2 is installed just before the BJ.
It is designed to detect the leading and trailing edges of the paper being conveyed. A switching pawl 105 is disposed downstream of the first conveyance roller 101, and the stapling part (2) and shift sorting, which will be described later in the conveyance direction, are controlled by the action of a driving solenoid (not shown) and a spring (not shown). It can be changed in any direction between 11 and 14 parts.

When the copying operation is started, the shift motor M2 is driven, and the abutting plate 106 moves in the front-back direction. Accordingly, the discharge tray 107, which is supported so as to be movable up and down and back and forth, engages with the unevenness of the abutment plate 106, and moves in the front and back direction, thereby starting a shift operation. Then, the shift 1 sensor 117 detects the other shift detection plate 1 that is different from the shift I detection plate 118 that was detected before the start of the shift operation.
18 is 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 rotates in the upper direction of the tray,
Eject tray 107 is raised.

After the vertical movement starts, when a part of the support bracket of the presser roller 108 is detected by the paper surface detection sensor, or when the upper limit sensor detects the vertical detection plate, the vertical movement drive morph M3 is stopped by the signal, and the vertical movement drive morph M3 is stopped and the ejection 1 to The rise of the ray 107 ends. The paper surface detection sensor supports the bracket.
When the gutter is detected, the vertical movement drive motor M3 rotates in the tray lowering direction, and the vertical movement drive morph M3 stops when the paper surface detection sensor no longer detects the support bracket.

The recording paper ejected from the main body is received by the conveying roller 101 at the same linear speed as the ejection speed from the main body.

When the recording paper is conveyed and the population sensor SNI detects the trailing edge of the recording paper, the linear velocity is amplified to a value greater than the recording paper main body ejection speed, and the trailing edge of the recording paper is detected by the entrance sensor SNI.
After a predetermined period of time has elapsed since the recording paper was detected, 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. The recording paper discharged to the discharge tray 107 slips under the presser roller 108 by the general feeding force caused by gravity and the rotation of the fur brush 103, and is abutted against the abutting plate 106, thereby aligning the rear end.

At this time, when a specified number of copies have been ejected, the shift motor M2 rotates in response to the signal and starts a shift operation. - When the process shift is completed, shift motor M2 stops. This operation changes the stacking position of the recording sheets on the ejection tray 107, and the recording sheets are sorted.

When a series of copying operations is completed and the last sheet is ejected, the signal causes the vertical drive motor M3 to rotate in the downward direction, and the operation is completed after the ejection tray 107 has descended by a specified amount. There is.

When a certain amount of recording paper is accumulated and the paper surface approaches the paper ejection port and a part of the presser roller support bracket is detected by the paper surface detection sensor, the vertical movement drive motor M3 rotates in the tray lowering direction based on the signal. The holding force of the worm 126 and the lock of the one-way clutch are released, and the discharge tray 107 descends under its own weight. Ejection tray 107
When the paper surface lowers due to the lowering of the presser roller and a part of the presser roller support bracket is no longer detected by the paper surface detection sensor, the vertical movement drive motor M3 is stopped by that signal, and the holding force of the worm 126 and the locking of the one-way clutch are activated. Then, the discharge tray 107 also stops.

As the ejection tray 107 descends, the vertical movement drive motor M3 is stopped by a signal when the upper and lower detection plates are detected by the lower limit sensor, and further descent of the ejection tray 107 is prevented.

The recording paper processing operation will be explained next. First, the stapling operation is selected using the staple key, the original (N sheets) is set on the original feed table (RD H) (not shown), and the number of copies (K copies) is input using the 10 key, and then the copy button is pressed. When is pressed, a coby size signal is received from the main body of the copying machine, and it is determined whether or not the size can be inserted into the staple section. If the size is such that it can be inserted into the staple section, it is determined whether the claw 46 of the discharge heald 17 is at the home position (HP). If it is not in the Baum position, it is returned to the home position by the heald drive motor.

Further, it is detected whether or not the stapler S is at the home position, and if the home position is detected, the stapler S is moved to a predetermined position by the size signal,
If the home position is not detected, the stapler S moves until the home position is detected, and after detecting the home position, moves to the specified location using the size signal.
is now moving.

Also, jogger fence 5.6 is at home position (HP
), and 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 control is not detected, the home position is detected. After detecting the home position, the jogger fences 5 and 6 are moved to a predetermined position according to the size signal.

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 to perform guidance. 3. When the rear end of the paper passes through the entrance sensor SNI, it is fed at high speed. The switching solenoid is turned off after a predetermined time elapses after passing through the entrance sensor SNI, that is, the time until passing through the switching guide member 105. The recording paper is discharged to the staple 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 paper discharge section upper guide F plate 67. The paper discharge roller 3 is provided with a flange, which bends the recording paper into a wave shape and gives it stiffness. When the rear end of the recording paper passes through the ejection roller 3, the coaxial fur brush Ia
, Ib, the rear end of the recording paper is pushed down and brought to abut against rear end fences 5a and 6a provided on the rear end fence and the jogger fence 5.6. After a predetermined period of time has elapsed after passing through the lower paper discharge sensor 50, the drive motors for the jogger fences 5 and 6 that had been waiting until then repeat forward and reverse rotation once or twice, thereby aligning the recording paper in the width direction. After such alignment is performed, it is returned to the standby position. This alignment operation is repeated for each recording sheet until a job end signal is issued from the main body of the copying machine.

Next, when a one-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 fence 5.6. Then, the drive motor in the stapler S starts driving, and the stack of recording sheets is stapled. In this binding operation, it is determined whether or not one-place binding is performed. If one-place binding is performed, the jogger fence 5.6 moves to a position slightly away from the paper bundle after the binding operation is completed. In the case of 24rIJ or more, the stapler movement morph moves the stapler to a predetermined position and the fencing operation is performed again. After the stapling operation is performed, the jogger fences 5 and 6 are moved to a position slightly away from the paper bundle. be returned. At this time, the discharge belt 17 rotates and pushes up the rear end of the stack of recording paper from the claw 46, and the paper is discharged from the I-ray 53 in the same direction as the discharge direction to the staple tray.
to be discharged.

FIG. 2 is a control block diagram according to an embodiment of the present invention, in which 200 is a CPU (control means), and a paper output tray 5
Signals from the Gion sensor 20I that detects the recording paper on 3, the staple sensor 202 that detects staples, etc. are input to the cover sofa 20.
3.

Further, the CPU 200 outputs commands to loads such as the various motor groups 20, 1 and solenoids 205.

206 is RDH (automatic document circulation feeding device N), and CP
It is connected to U200 via a serial interface.

Next, the control operation of the tree invention will be explained based on the flowchart I shown in FIG.

Note that the number of recording sheets is counted by the RD connected to the main unit.
Perform this on H206, and enter the number of copies using the 10 key on the main unit.

In addition, in the flowchart, NB: Number of copies created, Ns: Number of copies created up to that point, N6: Number of original sheets, NK (=NG XNB): Number of recording sheets, NB
'; The number of copies that can be loaded on the output tray.

First, the operator places the original into the RDH206 (Sl)
, the number of copies to be created Nn is input using the 10 key (S2). Then, when Ns is initialized to 1 and N is initialized to 0 (S3) and the copy star 1- key is pressed (S4), the original is conveyed onto the contact glass by the RDH 206 and copied. At this time, the number of original sheets N is counted by the RDH 206 (S5). When the original has completed one cycle and some copies have been completed, the count of the number of original sheets is finished and N is determined (S
6). If the number of copies to be created is two or more (S7), the copying operation continues. At this time, the number of copies that can be stacked on the paper output tray 53 is NB based on the number of recording sheets NK and the number of copies to be created NB.
'is definitely NB' is NB.

(Set in advance from NK) (S8), NB'
<If NB, continue copying (S9゜SI)
(S
12) Temporarily suspend the copying operation (S13).

Then, a warning is displayed (S14). To restart, remove the stack of recording paper from the paper output tray 53 and then press the start key (S15). And N5-NB, that is,
The series of operations ends when the actual number of copies to be produced reaches the planned number of copies (S16).

〔Effect of the invention〕

As explained above, according to the invention set forth in claim 1, when the number of sheets and the number of copies of the recording paper stack reach a predetermined number, and according to the invention set forth in claim 2, in addition to this, the stapler is used. Since each operation is interrupted when the amount reaches a predetermined value, it is possible to prevent a problem in which a stack of recording sheets blocks the discharge port to the paper discharge tray and causes a jam.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a recording paper post-processing apparatus according to an embodiment of the present invention, FIG. 2 is a control block diagram thereof, and FIG. 3 is a flowchart thereof. 53... Paper output tray, 200... CPU, 201.
... Paper sensor, 202... Staple sensor, S... Stapler.

Claims (2)

[Claims] (1) In the recording paper post-processing device that staples the recording paper ejected from the image forming apparatus, the operation is performed when the number of stapled recording paper stacks and the number of copies ejected to the paper output tray reach a predetermined number. A recording paper post-processing device characterized by comprising a control means for temporarily interrupting the recording paper. (2) The recording paper post-processing device according to claim 1, wherein the control means further outputs a command to temporarily interrupt the operation when the amount of staples used reaches a predetermined value.