JP3173833B2 - Paper post-processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper post-processing apparatus for performing post-processing such as punching, sorting and binding on an image-formed sheet discharged from an image forming apparatus. The present invention relates to a sheet post-processing apparatus characterized in detecting a skewed feed of a sheet in a previous process and performing control thereafter.

[0002]

2. Description of the Related Art A sheet post-processing apparatus is used for performing post-processing such as punching, sorting, and binding on an image-formed sheet discharged from an image forming apparatus. In this type of post-processing apparatus, the sheets must be aligned for post-processing needs. In view of this, a bundle of sheets sorted by using a jogger is arranged to perform punching and binding operations. However, in the case of drilling holes, there is also a configuration in which holes are drilled first and then aligned. Such a device has the advantage that the hole punching unit only needs to punch holes in one sheet of paper, so that it can be small and the cost can be reduced accordingly.

However, in such a sheet post-processing apparatus, if the sheet is skewed (skewed), the perforated position shifts, and it becomes meaningless to align the sheets.
An oblique feed detection mechanism is provided.

[0004]

By the way, such a device is provided with an oblique feed detecting mechanism, and even if the oblique feed of the folded paper is detected, the obliquely fed paper has the same discharge port as the other paper. For this reason, it takes a long time to discriminate the sheet fed obliquely, and the work efficiency is poor.

The present invention has been made based on such a background, and detects the number of sheets passed through from the output of a sheet sensor.
Knowledge, detection of skew feed, and how many sheets
It is an object of the present invention to provide a sheet post-processing apparatus capable of easily determining whether a sheet has been touched.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet post-processing apparatus having at least a perforation unit for performing post-processing including perforation on an image-formed sheet discharged from an image forming apparatus. At least two paper sensors provided at a position orthogonal to the paper conveyance direction on the downstream side of the perforation unit in the paper conveyance direction, and a number-of-passes detection means for detecting the number of paper sheets from the detection output of at least one of the paper sensors , and the oblique feed detecting means for detecting whether the skewing has been made on the paper from the difference between the sheet detection signal of the paper sensor, the detection output from what th by the skewed detector and the detection output by the pass number detecting means paper is by connexion achieved Rukoto and a determining means for determining has been skewed.

[0007]

[0008]

[0009]

In the present invention , the number-of-passed-sheets detecting means is provided by the paper sensor.
The number of sheets is detected from the detection output .
Detecting skewing by sheet from the difference between the sheet detection signal of the paper sensor, determining means and detection result by passage number detecting means
Based on the detection result of the skewed sheet, it is possible to know the number of sheets skewed. Therefore,
According to the determination result of the determination means, it is possible to easily find a sheet that is obliquely fed from the discharged sheet bundle.

[0010]

[0011]

[0012]

FIG. 1 is a block diagram showing details of a sheet post-processing apparatus.
FIG. 2 is a schematic configuration diagram showing a state in which a front cover of a sheet post-processing apparatus (sheet processing machine) 1 according to one embodiment of the present invention is removed, and FIG. 3 is a perspective view of the entire copying system apparatus. The sheet processing machine 1 has the appearance shown in FIG. 2 when the front cover is closed, and in the most preferred embodiment, the sheet processing machine 1 shown in FIG.
As shown in FIG. 1, a control signal line of the sheet processing machine 1 is inserted between the copying machine 2 and the sorter 3, and is connected to the copying machine 2.
The control signal line of the sorter 3 is also connected to the copying machine 2.

When the copying machine 2 is designed to be most suitable for this combination, the copy size (paper size), the number of copies, the copy supply attitude (vertical and horizontal), the stamp data (stamp necessity, stamp position) , Emission source, drawing type),
Punch data (whether punch is necessary), paper ejection data (tray ET
To the sheet processor 1 or to the sorter 3), a start signal, an end signal, and the like.

The sheet processing machine 1 is provided with an operation board 4 on which the paper size, the paper orientation (vertical and horizontal), the stamp data (necessity of stamp, stamp position, light emitting source). , Drawing type), punch data (necessity of punching), paper discharge data (paper discharge to tray ET or sorter 3)
Paper), a start signal and the like can be set or input, and can operate even in response to the setting of the operation board 4 and the operation of the board 4 independently of the copying machine 2. ing. When a certain signal is received from the copying machine, the sheet processing machine 1 picks up data and signals received from the copying machine 2 in preference to setting and operation of the operation board 4. When the copying machine 2 does not provide the required data, the sheet processing machine 1 operates according to the setting and / or operation of the operation board 4.

Referring back to FIG. The sheet is supplied from the copying machine 2 to the sheet processing machine 1 in the direction of arrow 5. When the copying machine 2 is not connected, paper is fed to the sheet processing machine 1 from the direction of arrow 5 by an auto feeder or a manual feed.

The paper entering the sheet processing machine 1 includes a vertical folding mechanism unit 6, a 90 ° turn mechanism unit 7, a blade folding mechanism unit 8, a perforating unit 9, and a stamp mechanism unit 1.
0, vertical transport mechanism unit 11, paper discharge mechanism unit 12
Then, the paper is conveyed in this order, and is discharged from the paper discharge mechanism unit 12 in the direction 13 toward the tray ET or in the direction 14 toward the sorter 3.

A vertical folding mechanism unit 6, a 90 ° turn mechanism unit 7, a blade folding mechanism unit 8, a hole punching unit 9,
The stamp mechanism unit 10 and the vertical transport mechanism unit 11 are housed in a drawer-type case, and the paper discharge mechanism unit 12 is mounted on the main body of the sheet processing machine 1 and protected by an openable and closable unit cover. I have.

Next, the configuration of the perforating unit 9 will be described with reference to FIG. The perforating unit 9 includes rollers 60 and 61 for receiving the paper fed from the unit 8, and roller rollers 64 and 6 whose roller shafts are slightly inclined with respect to the roller shafts 62 and 63.
5, 66, a fixed register 67 for alignment, a punch solenoid 68, a punch rod 69, and feed rollers 70, 7
1 and so on.

The punch solenoid 68 is fixed to a support plate 72. One end of a punch arm 73 is connected to the plunger of the punch solenoid 68. The punch arm 73 is pivotally connected to a pin 74, and the pin 74 is
It is stuck to. A punch rod 69 is connected to the other end of the punch arm 73.

An interlocking arm 75 is connected to the support plate 72. A punch seat plate 76 is fixed to the lower end of the interlock arm 75, and a punch receiving hole 77 is formed in the punch seat plate 76. With the punch seat plate 76 positioned below the paper transport surface and the punch bar 69 positioned above the paper transport surface,
The punch device can reciprocate in a direction orthogonal to the longitudinal direction of the register 67.

A screw rod 78 is screwed to the support plate 72, and the screw rod 78 is driven to rotate by a pulse motor 79.
The punch bar 69 is in the A4 punch position (two punch bars 69
The limit switch 80 is fixed at a position where the striker of the support plate 72 hits when the distance between the middle of the fixed register 67 and the fixed register 67 is a half of the long side of A4). When the switch 80 is closed (the state of FIG. 5), the punch device is at the A4 punch position. When punching the B plate, the fixed register 6
P5 (the distance between the middle of the two punch rods 69 and the fixed register 67 is a half of the long side of B5) and the distance difference between the A4 punch position and the pulse motor 79 is energized forward and stopped there. When changing from B size punch to A size punch, switch 8
Until 0 is closed, the pulse motor 79 is biased in the reverse direction.

The register 81 is for positioning the punch of A4 paper, and the register 82 is for positioning the punch of B5 paper. The registers 81 and 82 respectively
The plungers of the solenoids 83 and 84 are connected. When the solenoid is energized, the plungers advance into the paper transport path and stop incoming paper.

Immediately below the punching device, steel ball solenoids 85 and 86 are arranged on the roller 70 and another roller so as to accurately position the paper at the time of punching. The other main rollers have steel balls mounted thereon.

87, 88 and 89 are paper sensors;
Paper sensors 88 and 89 are shared for jam detection and oblique feed detection. The paper sensors 88 and 89, which are reflection type photo sensors, are arranged at a predetermined distance in the direction perpendicular to the longitudinal direction of the register 67 immediately before the register 82 just above the paper transport path. Reflection type photo sensor 8
Reference numerals 8 and 89 and 87 generate a paper presence signal by reflecting the light emitted from the light emitting element to the arriving paper and entering the reflected light into the light receiving element. Inlet roller 6
Above 0 and 61, a cutter 25 for cutting the jam paper straddling the units 8 and 9 is arranged. When the switch 22 (FIG. 2) is momentarily closed, the cutter 25
It reciprocates to cut the jam paper. The paper is sent from the perforating unit 9 in the direction shown by the arrow 90 and is sent to the stamp unit 10. 91 and 92 are steel balls.

Next, an electric control system for controlling the operation of the mechanism unit will be described. FIG. 6 shows a schematic configuration of the electric control system.
The electrical control system is an operation board control unit 100, vertical folding, 9
0 ° turn control unit 101, blade folding control unit 1
02, a punch control unit 103, a stamper control unit 104, a vertical conveyance / discharge control unit 105, and a main power source energizing circuit 106 for the sheet processing machine main body.

As shown in FIG. 3, the operation board 4 is mounted on the upper surface of the sheet processing machine 1, and the key switches 107 (for indicating the paper size), 108 (for indicating the paper orientation), 109 ( Folding type designation), 110 (for punching necessity designation), 111 (for stamp drawing type designation),
112 (for specifying the light emitting source mark of the stamp), 113 (pressing position of the stamp mark: position in the paper feeding direction: for specifying), 114
(For specifying the paper discharge direction) and 115 (for specifying the start)
The key-in interface 1 of the control unit 100
16 is connected, and the control unit 1 is connected to an indicator (light-emitting diode: indicated by a double circle in FIG. 6) on the operation board 117.
00 display interface is connected.

On the display panel 118 of the operation board 4, a paper transport path in the sheet processing machine 1 is drawn, and an indicator light (light emitting diode) is provided at a paper jam detection position on the paper transport path.
Is arranged. These indicators are connected to the display interface 119. The signal line of the copying machine 2 is connected to the host interface 120 of the control unit 100 via a connector (not shown). The main power source energizing circuit 106 of the sheet processing machine is connected to the interface 121 of the control unit 100.

The operation board control unit 100 includes various interfaces and input / output ports (I /
O), common bus line 122, microprocessor 12
3, consisting of a RAM 124 and a ROM 125, for exchanging signals with the copying machine 2,
Set the ON / OFF signal to 06 and exchange signals with the control units 101, 102, 103, 104 and 105. In addition, it reads the status of the key switch on the operation board 4 and controls on / off of the indicator lamp.

Other control units 101, 102, 10
3, 104 and 105 are also the operation board control unit 1.
00, the interface, I / O,
Microprocessor and, if necessary, ROM, RA
M and the like. Control units 100, 10
1, 102, 103, 104 and 105 are stored in the lower part of the sheet discharge tray ET of the sheet processing machine 1. Electrical elements such as a sensor, a solenoid, and a motor of the punching unit shown in FIG. I have.

Next, the control operation of the present invention, that is, the control for detecting the oblique feeding of the sheet on the upstream side of the perforating unit 9, will be described with reference to the flowchart of FIG. First, when both the sensors 88 and 89 of the perforating unit 9 detect the sheet (Y in S1 and Y in S2), the sheet is conveyed straight, so the sheet passing counter CPNT is incremented by one. (S3) When the sheet is the A plate (Y in S4), when the sheet comes into contact with the register 81 (Y in S5), the steel balls solenoids 85 and 86 are energized to supply the steel balls 91 and 92. Is raised (S6). This allows
The sheet stops with the leading end contacting the register 81.
Next, the solenoid 68 is energized, and the punch rod 69 is
After the time to enter the paper, the solenoid 68 is de-energized to make a hole in the paper (S7). Next, all solenoids 85, 8
4, 83, 86 are cut off (S8), and the sensor 88 is turned off.
Alternatively, referring to the detection state of 89 (S9), when the sensors 88 and 89 change from the sheet detection state to the non-detection state (when the punched sheet leaves the sensor 88 or 89), the timer is set and the next sheet arrives. Wait for.

On the other hand, if the sensor 88 detects a sheet (Y in S1) and the sensor 89 does not detect a sheet (N in S2), or vice versa (N in S1, Y in S10),
This means that the sheet is fed obliquely, and the passing number counter CPNT and the oblique feed number counter SK
The CNT is incremented by one, and a sheet oblique feed signal is transmitted to the control unit 100 to switch and control the gate claw 48. That is, if the first discharge mode in which the paper is discharged in the tray discharge direction 13 is being executed, the mode is switched to the second discharge mode in which the paper is discharged in the sorter discharge direction 14, and conversely, the second discharge mode is performed. If the second discharge mode is being executed, the mode is switched from the first discharge mode to the second discharge mode (S11).

Next, the control unit 100 transmits the sheet number data for displaying on the operation board 4 the number of the sheet that has been fed obliquely (S12). afterwards,
The process proceeds before step S4. Note that both sensors 88, 8
If both sheets 9 do not detect a sheet, it is determined that a trouble such as a jam or non-feed has occurred, and the rollers are stopped (S13).

[0033]

As is apparent from the above description, according to the present invention having the above-described structure, the number of passed sheets can be detected.
The stage detects the number of sheets from the detection output of the paper sensor, and
The feed detection means is oblique from the difference between the paper detection signals of the paper sensors.
The fed sheet is detected, and the determining means is a passing sheet number detecting means.
Based on the detection result of
It is possible to know how many sheets of paper were sent diagonally
Therefore, from the output of the paper sensor,
Knowledge, detection of skew feed, and how many sheets
Can be easily determined

When the oblique feed detecting means detects the oblique feed of the paper, if the paper has been discharged in the tray discharge direction, the paper is discharged in the sorter discharge direction and in the sorter discharge direction. According to the second aspect of the present invention, the sheet that has been fed obliquely is discharged to a discharge path side different from other sheets. Since the sheet fed obliquely can be quickly identified and eliminated without the operator searching for it, the work efficiency can be improved.

Further, when the skew feed detecting means detects the skew feed and the judging means judges the number of the sheet, when the skew feed is judged, the display shows the number of the sheet fed obliquely. According to the third aspect of the present invention further comprising a control means, the operator can take out the sheet fed obliquely while looking at the display, thereby improving the work efficiency.

[Brief description of the drawings]

FIG. 1 is a detailed configuration diagram of a sheet post-processing apparatus according to an embodiment of the present invention.

FIG. 2 is a simplified configuration diagram of a sheet post-processing apparatus according to an embodiment of the present invention with a front cover removed.

FIG. 3 is a perspective view of the entire copying system apparatus.

FIG. 4 is a flowchart showing control contents according to the embodiment of the present invention.

FIG. 5 is a perspective view of a perforating unit.

FIG. 6 is a block diagram of a control system of the entire copying system apparatus.

[Explanation of symbols]

 Reference Signs List 3 sorter 4 operation board 6 vertical folding mechanism unit 12 paper discharge mechanism unit 13 tray paper discharge direction 14 sorter paper discharge direction 88, 89 paper sensor 100 control unit 103 punch control unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-88670 (JP, A) JP-A-57-115567 (JP, A) JP-A-63-101245 (JP, A) JP-A-61-1985 211271 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 7/06 B65H 37/04

Claims (1)

(57) [Claims] 1. A paper post-processing apparatus having at least a punching unit and performing post-processing including punching on an image-formed sheet discharged from an image forming apparatus, comprising: At least two paper sensors provided at a position orthogonal to the paper transport direction of the side, a number-of-passed-sheet detecting means for detecting the number of passed sheets from a detection output of at least one of the paper sensors, and a paper detection signal of each paper sensor determining a skewed detection means for detecting, what sheet of paper from the detection output of the detection output of the pass number detecting means and said oblique feed detecting means is skewed whether skewing has been made on the paper from the difference between the A sheet post-processing apparatus, comprising: