JPH04348995A - Paper stitching device - Google Patents

Abstract

PURPOSE:To release locking by reversely rotating a motor which actuates a driving part in locking a stapler and display a locked state of the stapler. CONSTITUTION:A stapler controller 30 which judges an operation state of a stapler by using an output signal of a home sensor and a timer and outputs a motor reverse rotation command in a locked state, and a motor drive circuit 31 reversely drives the motor based on a motor reverse rotation command, are provided. When drive operation of a staple pin is started, a timer is started. Where a home position is not detected after a specific time has elaspsed, the stapler is judged to be in a locked state (abnormality), and the motor is reversely rotated. Where the home position is detected within a specific time when the motor is reversely rotated, the staple pin is judged not to be correctly driven (generation of jam) and where the home position can not be detected when a specific time has elapsed, a breakdown state of the stapler is judged. When the stapler is abnormal, the motor is stopped or electrification to the motor is cut, and its contents (jam, trouble) are displayed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to paper binding devices such as finishers, sorter staplers, offline staplers, etc. of copying machines, and is especially useful when releasing a locked state in which the device has stopped in the middle of driving a staple pin into a copy. The present invention relates to a paper binding device that eliminates the damage caused to devices and copies.

0002

[Prior Art] As copying machines are being developed with higher precision and higher speed, there is an increasing demand for improvements in the productivity and reliability of the entire copying system. Improvements are being made to post-processing devices (finishers) such as staplers and punchers that punch holes. As shown in Figure 2, the copying system includes a copying machine main body 1 that performs image processing on paper of a specified size based on image information read from the original, and an automatic original circulation feeding device that sequentially circulates and feeds the original. 2 (hereinafter referred to as "RDH")
and a finisher 3 that performs copy post-processing.

[0003] In this system, one original is fed from the RDH, one copy is made by the copying machine, the original is returned to the original table, and the next original is fed and the same process is performed. This system is called a precolation system, in contrast to a postcolation system that uses a sorter to collate one copy of a manuscript.

By the way, when performing paper binding processing as post-processing of copies, the finisher 3 is equipped with a motor-driven stapler 4;
is configured to operate when a copy of the final original is ejected from the copying machine main body 1 to the compiler tray 5 and when all the copy sheets 6 have been aligned.

[0005] As shown in FIG. 4, the stapler 4 normally has the stapler 7 in an open state (home position) so that the corner 6a of the copy paper can be set, and the paper sensor detects the copying of the final original. The staple pin is driven into the copy paper in one cycle in which the driving unit moves up and down, and then returns to the home position and is stopped.

[0006]

[Problems to be Solved by the Invention] In the above-mentioned driving operation, the motor may be locked with the staple pin stuck in the copy paper because the copy paper is hard or the like. When this lock occurs, the copy paper is normally stuck in the stapler (as shown by the two-dot chain line in FIG. 5), so that it is impossible to remove the copy paper, so-called jam clearing. In such a locked state, there is a problem in that if the copy paper is forcibly removed, the stapler may be broken, or the copy paper may be torn and pieces of paper may remain, preventing subsequent processing from proceeding normally. An object of the present invention is to provide a paper binding device that releases the lock by reversing the motor that operates the driving section when the stapler is locked. Another object of the present invention is to provide a paper binding device that determines the locked state of a stapler and displays different displays depending on the content.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a stapler that controls the drive of a motor that operates the driving section based on an output signal of a home sensor that detects the home position of the driving section. A stapler controller that determines the operating state of the stapler using an output signal of a home sensor and a timer and outputs a motor reverse rotation control signal when the stapler is in a locked state; The motor drive circuit includes a motor drive circuit that drives the motor in reverse. Others include means for indicating the locked state of the stapler. The display means is configured to indicate that a jam has occurred when the home position of the driving unit is detected within a predetermined time when the motor is reversed, and to indicate that a failure has occurred when the home position of the driving unit is not detected even after a predetermined time has elapsed. has been done.

[0008]

[Operation] When the staple pin driving operation starts,
If the timer starts and there is an output signal from the home sensor within a predetermined time, that is, the home position is detected, it is normal. If the home position is not detected after a predetermined period of time has elapsed, it is determined that the stapler is in a locked state and abnormal, and the motor is rotated in reverse. When the motor reverses,
If the home position is detected within a predetermined time, it is determined that the staple pins are not correctly driven in (jam has occurred). Furthermore, if the home position cannot be detected after a predetermined period of time has elapsed, it is determined that the stapler is in a malfunctioning state. When an abnormality occurs in the stapler as described above, the motor is stopped or the power to the motor is cut off, and the details of the abnormality are displayed.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 shows a schematic configuration of a finisher including a stapler. The paper binding device 3 includes a first conveyance path 9 leading from a copy output port of the copying machine body 1 to a tray 8 that accommodates copies without binding, and a second conveyance path 10 that conveys copies with binding to a compiler tray 5. A guide 11 is provided for switching between the two transport paths 9 and 10. In the second conveyance path 10, there are conveyance rolls 12 on the way.
Also, a discharge roll 13 is disposed at the end, and the copy discharged from the copying machine main body 1 is guided to a second conveyance path 10 by a guide 11, and is detected by a paper sensor 14 as it passes through this conveyance path. It is collected in the compiler tray 5.

The compiler tray 5 receives the received copy 6
The tray is installed at an angle in order to align the sheets in a predetermined position, and a cutout 5a is provided at one corner of the lower part of the tray. As shown in FIG. 3, there are a lead guide 5b and a side guide 5c for aligning the paper on both sides of the cutout 5a.
is provided. Above the compiler tray 5, a dropped copy 6 is placed on a side guide 5 using its slope.
A rotating brush 15 for scraping in the c direction and a scuffer roll 16 for moving the copy in the direction of the cut portion and aligning it with the guides 5b and 5c are disposed. The scuffer roll 16 is provided to be movable up and down, and provides a conveyance force depending on the weight of each copy depending on the thickness of the copy, and cooperates with a rotating brush to align the copies and cut corners 6a into the cutout portion 5a.
to be located.

As shown in FIG. 4, the stapler 4 is set at the home position with the stapler 7 open, and when the number of copies detected by the paper sensor 14 matches the number of originals, the controller of the copying machine body 1 The driving unit 7 moves in the direction of arrow A according to the output signal from the controller of the finisher 3 based on the command from , drives the staple pin into the copy 6 (broken line in the figure), and then returns the driving unit 7 to the home position (solid line in the figure). Then, a push-out mechanism (not shown) is activated to eject the bound copy onto the output tray 18 in preparation for the next stapling operation.

The stapler, as shown in FIG.
A paper binding mechanism is incorporated to perform paper binding processing on a with staple pins. This paper binding mechanism includes a driving section 7 that moves up and down in a direction substantially perpendicular to the copy receiving surface 21 of the base frame, and a clincher section (not shown) that bends the tips of staple pins driven by the driving section 7 and penetrating the copy. ), and a stapler motor 2 that operates each of the above parts.
It is composed of 2nd grade. In addition, in order to perform one driving operation in one cycle from the home position of the driving unit 7 to the home position, the sensor plate 23 rotates in synchronization with the vertical movement of the driving unit 7, and this sensor plate 23
A home sensor is provided which includes a photointerrupter 24 which extracts a home position signal from a cutout portion 23a of the vehicle. Based on the output signal from the home sensor, the stapler motor 22 is controlled so that one driving operation is completed by one cycle of operation of the driving section 7.

Next, control of the paper binding device will be explained. FIG. 1 shows a control block of a paper binding device according to the present invention. The stapler controller 30 determines whether the operating state of the stapler is normal or abnormal using the output signal of the home sensor and a timer, outputs a motor control signal according to the result, and also displays the contents in the event of an abnormality. Output a signal. That is, the controller 30 outputs a motor normal rotation control signal based on a stapler operation signal issued by the controller of the copier main body and a home position signal from the home sensor when the final copy is ejected as detected by the paper sensor, and also outputs a motor normal rotation control signal. A sensor output change signal (ON→OFF or OFF→
ON), outputs a motor stop control signal, and also outputs a motor reverse rotation control signal when no sensor output change signal is input even after a certain period of time in addition to the above predetermined time, thereby stopping the sensor output within the predetermined time. When a change signal is input, a motor stop control signal and a jam indication signal are output, and if a sensor output change signal is not input even after a predetermined period of time has elapsed after the output of a motor reverse rotation control signal, the motor is not energized. Outputs a motor stop control signal and a failure indication signal to disconnect the motor.

The drive circuit 31 performs drive control to rotate the stapler motor 22 forward, reverse, and stop based on control signals from the stapler controller 30. The display circuit 32 performs processing to display a jam or failure based on the display signal from the stapler controller 30 and displays the result on the display 33. The operation of the stapler controller will be explained using a specific example. FIG. 7 shows a timing chart in normal and abnormal states, and FIG. 8 shows a flowchart showing the operation of the stapler controller. Note that the time is selected and set as appropriate depending on the system specifications, and 500 ms is used here.

When the paper sensor detects the final original copy (step 100), this final copy enters the compiler tray for 500 ms to align all copies.
After waiting for (step 101), the motor is started (step 102) and driven in forward rotation to start the staple pin driving operation. At the same time, the sensor plate also starts rotating. This driving operation time usually ends within 500ms, so if the home position is detected within this time (step 103), the motor is stopped by the sensor output (
Step 104). Further, in step 103, if the home position is not detected after 500ms (
Step 105), rotate the motor in reverse (Step 106)
If the home position is detected within 500ms (
Step 107) is a locked state in which the staple pin is not driven correctly (a jam occurs, as shown by the two-dot chain line in Figure 5).
It is determined that a jam is displayed (step 108) and the motor is stopped (step 109). Further step 107
If the home position cannot be detected after 500 ms has elapsed (step 110), it is determined that the stapler is malfunctioning, and the malfunction is displayed (step 111) and the power to the motor is cut off (step 112). In this embodiment, when a jam or malfunction is indicated, the stapler can be taken out of the machine to clear the staple pin jam or inspect the stapler.

[0016]

[Effects of the Invention] As described above, according to the present invention, the locked state of the stapler is detected using a sensor that detects the home position of the driving section, and the motor is reversely rotated to return the driving section to the home position. Since the structure is configured as follows, copy paper can be removed. In addition, when detecting the home position when the motor is reversed, a display is provided to notify that a jam has occurred if a predetermined time has elapsed, or that a failure has occurred if a predetermined time has elapsed. This allows you to deal with stapler locks, making it easier to clear jams.

[Brief explanation of drawings]

FIG. 1 is a control block diagram of a paper binding device of the present invention.

FIG. 2 is a configuration diagram of a precolation type copying machine system.

FIG. 3 is a diagram illustrating the relationship between copy paper on a compiler tray and a stapler.

FIG. 4 is a diagram illustrating normal operation of the stapler.

FIG. 5 is a schematic configuration diagram of a finisher.

FIG. 6 is a perspective view of the stapler.

FIG. 7 is a timing chart of stapler operation.

FIG. 8 is a flowchart showing the control operation of the stapler controller.

[Explanation of symbols]

1 Copy machine body 2 Automatic document circulation feeding device 3 Finisher 4 Stapler 5 Compiler tray 6 Copy paper 7 Driving part 22 Stapler motor 23 Sensor plate 24 Photo interrupter 30 Stapler controller 31 Drive circuit 32 Display circuit 33 Display

Claims (4)

[Claims] 1. A paper binding device including a stapler that controls the drive of a motor that operates the stapler based on an output signal of a home sensor that detects the home position of the stapler, wherein the operating state of the stapler is detected by the output of the home sensor. A paper binding device comprising: a stapler controller that makes a determination using a signal and a timer and outputs a motor reverse rotation control signal when in a locked state; and a motor drive circuit that drives the motor in reverse based on the motor reverse rotation control signal. . 2. The paper binding device according to claim 1, further comprising means for displaying a locked state of the stapler. 3. The paper binding device according to claim 2, wherein the display means is configured to display the occurrence of a jam when the home position of the driving section is detected within a predetermined time when the motor is reversed. . 4. The paper binding device according to claim 2, wherein the display means is configured to display the occurrence of a failure when the home position of the driving section is not detected even after a predetermined period of time when the motor is reversed. Device.