JPH09278272A - Sheet perforating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily carry out perforation not only in the front/rear end part of a sheet in the conveying direction but also in one side part (side part) of the sheet in the direction orthogonally crossing the conveying direction without requiring any complicated control. SOLUTION: A sheet perforating device arranged in the middle of a sheet conveying path 1 is provided with the first perforating mechanism 3, which carries out predetermined perforation in the conveying directional front/rear end part of a sheet 2, and the second perforating mechanism 4, which carries out predetermined perforation in one side part in the direction orthogonally crossing the sheet 2 direction. Especially, the second perforating mechanism 4 is constructed of perforation roll pair 7, 8, and a perforating blade 7a is projected on one of rotary roll bodies while a fitting hole 8a to which the perforating blade 7a is fitted is formed in the other rotary roll body. By means of a perforation roll pair driving controlling means 9, the perforation roll pair 7, 8 are controlled so as to start/stop rotating according to a size of the sheet 2 or a perforating condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet punching apparatus which is provided in a sheet processing apparatus such as an image forming apparatus and which performs a predetermined punching process on each sheet.

[0002]

2. Description of the Related Art For example, an image forming apparatus such as a copying machine as a sheet processing apparatus may be provided with a sorter for distributing and storing sheets as sheets in a plurality of bin trays. It has become very common to have a bundle of sheets after being mounted and automatically stapled (stitched). Furthermore, in recent years, there has been a demand for performing punching processing as well. As a response to this request, for example, the one disclosed in JP-A-5-162919 is known. . As for this type of punching process, it is common to form punching for each sheet in the process of conveying and discharging the sheet, and it is possible to arbitrarily set / cancel the punching process for each job.

Further, a sheet punching device of this type has a structure in which a leading end portion or a trailing end portion in the sheet conveying direction is punched (for example, Japanese Patent Laid-Open No. 3-19069).
No. 6 and Japanese Utility Model Publication No. 4-109897).

[0004]

However, in such a conventional sheet punching device, since the punching position is limited to the leading end portion or the trailing end portion in the sheet conveying direction, for example, in the sheet conveying direction. It was very difficult to satisfy the demand for perforating the side of the. That is, temporarily, using a conventional sheet punching device,
When punching processing is performed on the side in the sheet transport direction without punching holes at extra positions on the sheet, for example, two punch units for punching are mounted on a moving mechanism and the moving mechanism is moved. It is conceivable that after setting one punch unit at a position corresponding to the side position in the sheet conveyance direction by the above method, the conveyed sheet is appropriately stopped and the punching process is performed by the one punch unit. Since the unit moving mechanism must be provided, not only the sheet punching apparatus becomes large, but also the movement control of the punch unit becomes complicated, which causes a technical problem.

The present invention has been made in order to solve the above technical problems, and does not require complicated control, and can be applied not only to the leading end or the trailing end of the sheet in the sheet conveying direction but also to the sheet. (EN) Provided is a sheet punching device capable of easily punching a side portion (side portion) in a direction orthogonal to a conveyance direction.

[0006]

That is, the present invention provides:
As shown in FIG. 1, in a sheet punching apparatus installed on a punching stage ST in the middle of the sheet transport path 1 and performing a predetermined punching process on a predetermined portion of the sheet 2 transported by the punching stage ST, A first punching mechanism 3 that performs a predetermined punching process on the front end or the rear end in the transport direction, and a first punching mechanism that performs a predetermined punching process on one side in a direction orthogonal to the transport direction of the sheet 2. It is characterized in that it also has the punching processing mechanism 4 of 2.

In such technical means, the first punching mechanism 3 and the second punching mechanism 4 are usually selectively used, so that the first punching mechanism 3 and the second punching mechanism are used. Driving means 5 and 6 in which the processing mechanism 4 is independently driven
Is preferably provided. In this case, the drive means 5,
Although 6 may be a completely different system, it is preferable that the driving force from one driving source be switched and supplied by a switching means such as a clutch.

Regarding the first perforation processing mechanism 3,
The sheet 2 may be uniquely set at either the front end portion or the rear end portion in the transport direction, or the sheet 2
It does not matter if either the front end portion or the rear end portion in the conveyance direction can be selectively set. Further, the first perforation processing mechanism 3 is usually provided with a perforation unit according to the number of perforations and the number of perforations, but the number of perforations and the number of perforations may be appropriately selected. The design may be changed so that can be variably set. Furthermore, regarding the adjustment of the punching processing position by the first punching processing mechanism 3, the sheet 2 in the conveying direction side is the normal sheet 2
It is possible to cope with this by controlling the transport position of 1., but it is preferable to install the first perforation processing mechanism 3 so that it can be finely adjusted at least on the direction side orthogonal to the transport direction of the sheet 2.

Regarding the second perforation processing mechanism 4,
Usually, one punching unit is provided, and the punching stage ST concerned
Although a plurality of punching processes are performed according to the position of the sheet 2 passing through, the punching unit may be provided according to a predetermined number of punches and a predetermined punching position. Further, adjustment of the punching processing position by the second punching processing mechanism 4 can be handled by controlling the transporting position of the normal sheet 2 on the transporting side of the sheet 2, but at least it is orthogonal to the transporting direction of the sheet 2. On the direction side, it is preferable to install the second perforation processing mechanism 4 so that it can be finely adjusted.

As for the punching units of the first and second punching mechanisms 3 and 4, at least punching pins capable of moving back and forth may be appropriately selected as long as they can punch the sheet 2. , The sheet 2 is used in the type in which the punching process is performed while the sheet 2 is temporarily stopped,
Since the punching pitch error is inevitably caused by the stop position error, it is preferable to perform the punching process while the sheet 2 is being conveyed from the viewpoint of preventing this. As a mode in which the punching process is performed while the sheet 2 is conveyed, the first punching mechanism 3 and the second punching mechanism 4 are used.
Has a pair of rotating rolls that sandwich the sheet 2 and rotate in the conveying direction of the sheet 2. One of the rotating rolls is provided with a punching blade 7a, and the other rotating roll is provided with a punching blade. A pair of perforating rolls 7 and 8 is formed by forming a fitting hole 8a into which 7a is fitted. By rotating the pair of perforating rolls 7 and 8, the sheet 2 being conveyed is perforated. .

Further, the second punching mechanism 4 is provided with the sheet 2
Has a pair of rotating rolls that are nipped and rotate in the conveying direction of the sheet 2. One of the rotating rolls has a punching blade 7a.
And a piercing blade 7 on the other rotating roll body.
From the viewpoint of optimizing the punching process according to various conditions in the type including the pair of punching rolls 7 and 8 formed with the fitting hole 8a in which a is fitted, the sheet 2 size and the punching condition Accordingly, it is preferable to provide a perforation roll pair drive control means 9 for controlling the start and stop of rotation of the perforation roll pair 7, 8. In such an aspect, from the viewpoint of simplifying the control of the perforation roll pair drive control means 9, it is preferable to match the outer peripheral length of the perforation roll pair 7, 8 with the minimum perforation pitch.

Next, the operation of the above technical means will be described. In FIG. 1, when the user selects either the first punching mechanism 3 or the second punching mechanism 4 for punching the sheet 2, the first punching mechanism 3 causes the leading edge or the trailing edge of the sheet 2. Predetermined perforation (H
A) processing is performed, while the second perforation processing mechanism 4 performs predetermined perforation (HB) processing on one side of the sheet 2 in the direction orthogonal to the conveying direction. At this time, for example, when the second perforation processing mechanism 4 is composed of the perforation roll pairs 7 and 8, the perforation roll pair drive control means 9 controls the rotation and stop of the perforation roll pairs 7 and 8 to convey the sheet 2 while nipping it. The punching blade 7a of the pair of punching rolls 7 and the fitting hole 8a are engaged with each other to perform the punching process at a predetermined pitch.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. First Embodiment (1) Outline of Apparatus FIG. 2 is an explanatory diagram showing an example of a copying machine in which the first embodiment of the sheet punching apparatus to which the present invention is applied is incorporated.
In the figure, the copying machine main body 20 includes a main body housing 21.
A plurality of cassette trays 23a for accommodating sheets 22 as sheets, and an intermediate tray 23b for double-sided copying / synthesis.
And a paper storage unit 23 having a manual feed tray 23c, and a document scanning unit 2 that scans and reads a document (not shown) placed on a platen 24, which is composed of a lamp, a mirror, a lens, and the like.
5, an image forming unit 26 that forms a toner image on the photoconductor based on the reflected light from the original, and transfers the toner image onto the paper 22 supplied from the paper storage unit 23; And a fixing unit 27 for fixing the toner image.

Further, in the present embodiment, an automatic document feeder 28 is provided above the main body housing 21 to feed documents one by one to a predetermined position on the platen 24. In addition, various copying modes (single-sided copying, double-sided copying, copy number setting, automatic magnification, etc.) are set in the copying machine main body 20 on the upper part of the main body housing 21.
A sheet post-processing device 40 described later is provided with a control panel 30 for setting a predetermined post-processing mode.

Further, on the side surface of the copying machine main body 20, sorting processing is performed on the paper 22 discharged from the copying machine main body 20,
A sheet post-processing device (hereinafter referred to as a post-processing device in the embodiments of the invention) 40 that performs post-processing for stapling and punching is provided. The post-processing device 40 basically functions as a sorter that sorts sheets, and as shown in FIG. 2, the sheets discharged from the copying machine body 20 in the post-processing housing 41. The receiving and conveying route 42 of 22 is branched into two systems, that is, the stack side conveying route 43 and the sort side conveying route 44, and the switching gate 45 is arranged at the branching portion, and the conveying routes 42 to 44 are appropriately arranged. A number of transport rolls 46 (specifically, 46a to 46d) are disposed, and discharge rolls 47 and 48 are disposed at the exits of the stack side transport route 43 and the sort side transport route 44, respectively. On the exit side of the side transport path 43, a stack tray 49 for accommodating non-sorted sheets 22 is provided, while on the exit side of the sort side transport path 44, the sheets 22 are stacked. Is obtained so as to provide a plurality of sorting bins tray 50 to be dispensed contained.

A sheet punching device (hereinafter referred to as a punching device in the embodiments of the invention) 51 for performing a predetermined punching process on the sheet 22 being conveyed is arranged in the middle of the sort side conveying path 44. On the other hand, among the plurality of sort bin trays 50, a portion facing a stapling stage different from the sheet distributing stage facing the sort side transport path 44 (arranged below the sheet distributing stage in the present embodiment) Stapler (staple processing unit) 5
2 are provided. A post-processing control panel 53 dedicated to the post-processing device 40 is also provided above the post-processing housing 41 of the post-processing device 40.

Next, an outline of the operation of the copying machine according to this embodiment will be described. Now, when a copy start operation is instructed by the start switch of the control panel 30 of the copying machine main body 20, the original set on the automatic document feeder 28 is fed to the platen 24, and the original on the platen 24 is placed on the original. Scanning is performed by the scanning unit 25. Further, in the image forming section 26, a toner image is formed on the photosensitive member by the well-known charging, exposing and developing processes. This toner image is transferred onto the paper 22 conveyed from the paper storage unit 23, and a toner image corresponding to the image of the original is formed on the paper 22. The toner image is fixed on the sheet 22 in the fixing unit 27, and the sheet 22 after fixing is sent to the post-processing device 40.

Paper 2 sent to the post-processing device 40
2 is sorted by the switching gate 45 to either the stack tray 49 or the sort bin tray 50. In the case of discharging to the stack tray 49 side, as shown by an arrow A in FIG. 2, the sheet 22 is guided to the stack side conveyance path 43 by the switching gate 45, and is conveyed by the conveyance roll 46 (46b) and the discharge roll 47. The sheet is discharged to the stack tray 49. On the other hand, in the case of discharging to the sort bin tray 50 side, as shown by an arrow B in FIG. 2, the switching gate 45 guides the paper 22 to the sort side conveyance path 44, and the conveyance rolls 46 (46c, 46d). And, it is discharged to the sort bin tray 50 by the discharge roll 48.

When the post-processing such as punching processing and stapling processing as well as the sorting processing is set on the control panel 30, the sheet 22 is guided to the sorting side transport path 44 by the switching gate 45. Sorting side transport route 4
A punching device 51 is provided in the middle of the sheet 4,
It is designed to perform a punching process. Then, the sheet 22 for which the punching process has been completed is conveyed to the discharge roll 48 side, and is sequentially discharged and stored to the sort bin tray 50 side by the discharge roll 48. After storage, sort bin tray 50
The sheets 22 stored in the respective bins are sequentially subjected to the stapling process by the stapler 52 arranged to face the sort bin tray 50 located on the stapling stage.

(2) Punching device Next, details of the punching device according to the present embodiment will be described. FIG. 3 is a front explanatory view of the punching device according to the present embodiment, FIG. 4 (a) is a left side view of FIG. 3, (b) is a right side view of FIG. 3, and (c) is a cross sectional explanatory view of FIG. Is. In each drawing, the punching device 51 has a pair of upper and lower chute frames 61 and 62 that form a sheet conveying path, a support bracket 63 is erected in the middle of the upper chute frame 61, and both side flanges of the upper chute frame 61 are provided. A first upper roll shaft 64 and a second upper roll shaft 65 extending in a direction orthogonal to the sheet conveyance direction (referred to as the sheet width direction) are rotatably supported between the support bracket 63 and the support bracket 63, while the lower side is supported. A lower roll shaft 66 extending in the width direction of the paper is rotatably supported between both side flanges of the chute frame 62, and the first punching mechanism A ( Two pairs of perforating rolls 71 and 72, which are a mechanism for perforating the rear end of the sheet in the sheet conveying direction, are assembled, while the second upper roll shaft 65 and the lower roll shaft are mounted. A pair of perforation rolls 73, which is a second perforation processing mechanism B (a mechanism for performing perforation processing on one side portion (side portion) in the direction orthogonal to the sheet conveyance direction), is attached to the reference numeral 6. is there.

In the present embodiment, the pair of perforating rolls 71
The openings 67 and 68 are formed in the chute frames 61 and 62 corresponding to ˜73.
Is the upper roll 7 pivotally mounted on the upper roll shafts 64, 65.
4 has a pin-shaped piercing blade 75 protruding from a part of the peripheral surface of
A fitting hole 77 is formed in a part of the peripheral surface of the lower roll 76 pivotally mounted on the lower roll shaft 66, and a gap corresponding to the thickness of the sheet is provided between the upper roll 74 and the lower roll 76. Is secured, and the punching blade 75 is loosely fitted in the fitting hole 77 every time the upper roll 74 and the lower roll 76 make one revolution in synchronization,
A punching process is performed on a corresponding sheet position during conveyance.

Further, in the present embodiment, the first and second
The driving system of the punching processing mechanisms A and B fixes the punch motor 80 as a driving motor to, for example, the lower chute frame 62, and the driving force of the punch motor 80 is transferred to the lower rolls via the drive transmission gears 81 and 82. Transmitted to shaft 66, while
The first upper roll shaft 64 has a drive transmission gear 83 meshing with the drive transmission gear 82 and an electromagnetic clutch (A clutch).
The driving force is selectively transmitted via 84, and the second upper roll shaft 65 has a drive transmission gear 85 axially attached to one end of the lower roll shaft 66, a drive transmission gear 86 meshing with the drive transmission gear 86, and an electromagnetic clutch. The driving force is selectively transmitted through the (B clutch) 87.

Further, in the present embodiment, a punch entrance sensor 91, for example, an optical sensor, is provided on the entrance side of the chute frames 61 and 62 with respect to the positions of the punching roll pairs 71 to 73 in the sheet conveying direction, and the sheet passes therethrough. It is supposed to work on while you do. Furthermore, a light shielding plate (a plate having a projecting piece protruding in the radial direction on a part of a disk) 93 is fixed to one end of the lower roll shaft 66.
3 is provided with a punch home sensor 92 composed of an optical sensor, and the light path of the punch home sensor 92 (not shown in FIG. 3) is blocked by the light shielding plate 93 every time the lower roll shaft 66 makes one rotation. It has become. In the present embodiment, when the output of the punch home sensor 92 is LOW (light-shielded state), the punching blade 75 of the upper roll 74 faces upward and the fitting hole 77 of the lower roll 76 faces downward. It is designed to detect

Here, the sheet trailing edge punching process by the first punching mechanism A (punching roll pair 71, 72) is schematically shown in FIG. Further, among the paper side punching processing by the second punching mechanism B (punching roll pair 73), the two-hole processing is schematically shown in FIG. 6A and the three-hole processing is schematically shown in FIG. 6B. .

(3) Control system of punching device FIG. 7 is a block diagram showing a control system of the punching device and its peripheral devices according to the present embodiment. In the figure, the control system is composed of a microcomputer system including a CPU 121, a ROM 122 and a RAM 123. The CPU 121 receives various input signals from the I / O port 12
4, the punching processing program, the sorting program, the stapling program, etc., which are incorporated in the ROM 122 in advance, are executed to generate a predetermined control signal, and then various control signals are output via the I / O port 124. It is designed to be sent to the device. In the figure, reference numeral 125 is a serial signal communication control circuit (UA in the figure).
(Displayed as RT), the control data RXD is received from the copying machine main body via the receiver 126, and the control data TXD is sent to the copying machine main body via the driver 127.

Now, the typical input switches, sensors and output devices in the control system shown in the figure will be described. First, as input switches and sensors, sort mode switches (SORT MOD
E SW) 101, punch mode switch (PUNCH MODE SW) 102 for selecting the punch mode, staple mode switch (STAP for selecting the staple mode)
LE MODE SW) 103, punch entrance sensor (PUNC
H ENT SNR) 91, PUNCH HOME SN
R) 92, an exit sensor (EXIT SNR) 94 provided on the front side of the discharge roll 48 of the sort side transport path 44 and configured to detect that the paper has passed through the discharge roll 48 and discharged to the sort bin tray 50 side, Sort bin tray 50 at the bottom
Bin home sensor (BIN HOME SNR) that is provided corresponding to the initial position of the bin and detects the home position of the sort bin tray.
95 is mentioned.

As output devices, a punch motor (PUNCH MOTOR) 80 and an A clutch (A CLUTCH) 8
4, B clutch (B CLUTCH) 87, sort bin tray 5
Bin motor (BIN MOTOR) 11 that drives 0 up and down
1, a staple motor (STAPLE MOTOR) 112 for performing staple processing on the stapler 52, and a staple moving motor (STAPLE moving motor) 113 for moving the stapler 52 between a standby position and a processing position.

8 to 13 are flowcharts showing the processing contents of the control system of the punching device according to the present embodiment. In FIG. 8, assuming that the sort mode switch 101 (see FIG. 7) is turned on, it is first checked whether the punch mode is selected. If the punch mode is not selected, the sort process (A) is immediately performed. Move to. On the other hand, if the punch mode is selected (punch mode switch 102 is turned on), it is checked whether the selected mode is the trailing edge punch mode of the sheet. Execute the process. Here, if the trailing edge punch mode of the sheet is not set, it is checked whether or not the sheet side punch mode is set. If the sheet side punch mode is set, the number of punched holes is checked and then the sheet side punch (two holes) processing is performed. Alternatively, the paper side punch (3 holes) processing is executed.

FIG. 9 shows the trailing edge punching process of the sheet according to the present embodiment, and the operation timing at this time is shown in FIG.
(A). In FIG. 9, first, after the A clutch 84 is turned on, the on / off state of the punch entrance switch 91 is checked. After a lapse of a predetermined time X1 from turning off the punch entrance switch 91, the punch motor 80 is turned on, and the punching process is performed by the pair of punching rolls 71 and 72 (first punching mechanism A) (see FIG. 5). The predetermined time X1 is the punch entrance sensor 9
1 and the punching blade 75 and the sheet conveyance speed. After that, when the punch home sensor 92 is turned on, the A clutch 84 is turned off, and the punching process is ended.

FIG. 10 shows the paper side punch (two holes) processing according to the present embodiment, and the operation timing at this time is shown in FIG. 14 (b). In FIG. 10, first, after the B clutch 87 is turned on, the punch entrance switch 9
Check 1 on / off. Then, after a predetermined time X2 has elapsed since the punch entrance switch 91 was turned on,
The punch motor 80 is turned on for a predetermined time, and the punching roll pair 73
The first punching process is performed by the (second punching mechanism B), and after the predetermined time X3 has elapsed from the time when the punch home sensor 92 was turned on, the punch motor 80 is turned on again for the predetermined time, and the pair of punch rolls 73 The second perforating process is performed (see FIG. 6A). The predetermined time X2 is appropriately set for alignment, and the predetermined time X3 is appropriately set for ensuring the drilling pitch. After that, when the punch home sensor 92 is turned on, the B clutch 87 is turned off, and the punching process is ended.

FIG. 11 shows the paper side punch (three holes) processing according to the present embodiment, and the operation timing at this time is shown in FIG. 14 (c). In FIG. 11, first, after the B clutch 87 is turned on, the punch entrance switch 9
Check 1 on / off. After the punch entrance switch 91 is turned on for a predetermined time X4,
The punch motor 80 is turned on for a predetermined time, and the punching roll pair 73
The first punching process is performed by the (second punching mechanism B), and thereafter, the punch motor 80 is turned on for a predetermined time again after a predetermined time X5 has elapsed from the time when the punch home sensor 92 was turned on, and the punching roll is turned on. The second and third punching processes by the pair 73 are performed (see FIG. 6B). The predetermined time X4 is set appropriately for alignment, and the predetermined time X5 is set appropriately for ensuring the drilling pitch. After that, when the punch home sensor 92 is turned on, the B clutch 87 is turned off, and the punching process is ended.

8 to 10, if the punch home sensor 92 cannot detect the completion of the punching process, a punch fail (PUNCH FALE) display is performed.

When such various punching processes have been carried out, the sorting process (A) is then carried out. The sorting process (A) is executed according to the flowchart shown in FIG. That is, when the sheet passes through the outlet sensor 94 (see FIG. 7), when the outlet sensor 94 changes from ON to OFF, the bin motor 111 (see FIG. 7) is driven as a unit to move each sort bin tray 50 by one pitch. To check if the final copy of the job is finished. Next, if the final copy of the job is not completed, the above-mentioned processing is repeated, and at the stage when the final copy of the job is completed, it is checked whether or not all the jobs, that is, the copy jobs of the entire original document have been completed. . Further, if all jobs have not been completed, the exit sensor 9
When the number 4 changes from ON to OFF, the bin motor 111 is driven as a unit to set each sort bin tray 50 to 1
Lower the pitch and check if the last copy of the job is finished. If the final copy of the job is not completed, the processes of steps 5 to 7 are repeated, and at the stage when the final copy of the job is completed, it is determined whether the bin home sensor 95 (see FIG. 7) is turned on. After checking, it is checked whether all the jobs are finished. At this time, if it is determined that all the jobs have not been completed, the process returns to the first step again, and a series of processing is performed thereafter. When it is determined in step 4 or step 9 that all jobs have been completed in such a process, a series of sort processes is completed. If it is determined in step 8 that the bin home sensor 95 is not turned on, a fail (FAIL) display is displayed. After this,
It is checked whether the staple mode is set. If the staple mode is set, the stapling process is started.

Further, the stapling process (C) is executed according to the flow chart shown in FIG. That is, the type of staple mode instructed by the control panel 30, specifically, one of the corner staple, single staple, and dual staple is executed,
When the stapling operation by the stapler is completed, a series of processing is ended. Specific processing of corner stapling, single stapling, and dual stapling may be described in, for example, Japanese Patent Laid-Open No. 257496/1992.

Second Embodiment The punching device 51 according to the present embodiment is substantially the same as that of the first embodiment, except that the configuration of the pair of punching rolls 73, which is the second punching mechanism B, is the same as that of the first embodiment. With a slight difference, the roll diameter d of the pair of perforating rolls 73 has a perforation pitch p for two holes at the outer peripheral portion.
Is set to match. Specifically, p = 8
0 mm and d = 25.465 mm.

Unlike the first embodiment, the contents of the paper side punch (two holes) processing according to the present embodiment are set as shown in FIG. 15, and the operation timing at that time is shown in FIG. In FIG. 15, first, the B clutch 8
After turning on 7, the on / off state of the punch entrance switch 91 is checked. Then, after a predetermined time X6 has elapsed after the punch entrance switch 91 was turned on, the punch motor 80 is turned on for a predetermined time, and the punching process by the punching roll pair 73 (second punching mechanism B) (punching roll pair 2) is performed.
Rotation) is performed (see FIG. 6A). The predetermined time X6 is set appropriately for alignment. After that, when the punch home sensor 92 is turned on, the B clutch 87 is turned off, and the punching process is ended.

According to the present embodiment, for the paper side punch (two holes) processing, it is sufficient to simply control the pair of perforating rolls 73 by two rotations to stop the punch motor 80.
Since it is not necessary to stop and restart the sheet in the middle, the paper side punch (two holes) processing is further simplified as compared with the first embodiment.

In this embodiment, FIG. 6 (b)
As shown in FIG. 5, the roll diameter d1 of the pair of perforating rolls 73 is set so that the outer peripheral portion thereof coincides with the perforating pitch p1 for three holes, specifically, p1 = 107 mm, d1 = 34.059.
If it is set to mm and control is performed to stop the pair of perforating rolls 73 by rotating three times, it is possible to simplify the paper side punch (three holes) processing.

Third Embodiment A punching device 51 according to the present embodiment is shown in FIGS. 17 and 18. FIG. 17A is a plan explanatory view of the punching device according to the present embodiment, FIG. 17B is a front explanatory view thereof, and FIG.
17 is a right side view of FIG. 17, (b) is a partially cutaway explanatory view of (a), (c) is an explanatory view showing details of the punching unit, (d)
FIG. 18 is a sectional view taken along the line AA in FIG. 17. In each drawing, the punching device 51 has a pair of chute frames 161 and 162 that form a sheet conveying path, a support bracket 163 is erected in the middle of the upper chute frame 161, and both side flanges of the upper chute frame 161 are provided. A first rotating shaft 164 and a second rotating shaft 165 extending in a direction orthogonal to the sheet conveying direction (referred to as the sheet width direction) are rotatably supported between the support bracket 163 and the upper chute frame 161. A drive transmission shaft 166 is rotatably supported between the both side flanges, and two punching units 17 which are the first punching mechanism A are provided at positions corresponding to the first rotary shaft 164.
1, 172 are assembled, while one perforation unit 173, which is the second perforation processing mechanism B, is assembled at a location corresponding to the second rotary shaft 165.

In the present embodiment, the punching unit 17
Nos. 1 to 173 have preset through holes 174 and 175 in the chute frames 161 and 162,
At a position corresponding to the through hole 174 of one chute frame 161, a retracted position (M: at which a punch pin 176 that can penetrate both through holes 174 and 175 is retracted at least from the transport path between the chute frames 161 and 162). The position shown by the solid line) and the advance position (N: the position shown by the chain double-dashed line) that completely penetrates both through holes 174, 175 are made to move back and forth.

In this embodiment, the punch pin 176 is used.
The advancing / retreating drive mechanism of FIG. 1 fixes a substantially elliptical eccentric cam 177 with a circular part protruding at a position corresponding to the punch pin 176 of the rotary shafts 164, 165.
An elastic spring 17 made of a coil spring is shown at 76.
8 is wound so that the head side of the punch pin 176 is constantly urged to the surface of the eccentric cam 177, and the rotating shafts 164 and 165 are rotated by a predetermined amount and the eccentric cam 1 is rotated.
By moving the surface 77, the punch pin 176
To move back and forth.

Further, in the present embodiment, the drive system of the first and second punching mechanisms A and B fixes the punch motor 80 as a drive motor to, for example, the upper chute frame 61. Driving force is pulley 181, 1
82, belt 183, and drive transmission gears 184, 18
5 and the electromagnetic clutch (A clutch) 84 to selectively transmit to the first rotary shaft 164, while the punch motor 80
Driving force is transmitted to the drive transmission shaft 166 via the pulley 181 and the belt 182 and the spring clutch 190, and further selected to the second rotary shaft 165 via the drive transmission gears 186 and 187 and the electromagnetic clutch (B clutch) 87. It is intended to be communicated. In the present embodiment, the spring clutch 190 has a locking link 192 that swings in synchronism with the on / off state of the punch solenoid 191.
Is provided, a locking claw 193 is provided on the outer cylinder of the clutch, and the locking link 192 is engaged with the locking claw 193 when the punch solenoid 191 is turned off.
While restraining the drive transmission shaft 166 by the braking action of 2,
The pulley 182 is idled, and the punch solenoid 19
When turned on, the locking state by the locking link 192 is released to release the braking action, and the drive transmission shaft 166 and the pulley 18 are released.
2 is connected to rotate the drive transmission shaft 166.

In the present embodiment, reference numeral 91 is a punch entrance sensor, and a punch home sensor 200 for detecting the initial position (standby position) of the punching units 171 to 173 is also provided. The punch home sensor 200 according to the present embodiment is provided with the first rotary shaft 164.
Further, a disc-shaped light shielding plate 201 is provided at each end of the second rotary shaft 165, and each light shielding plate 201 is formed with a cutout portion 202 corresponding to the home position. When the cutout portion 202 reaches the optical path position. The home position is detected by.

Further, the basic processing of the control system of the punching apparatus according to the present embodiment is shown in FIG. 8, and the trailing edge punch processing of the paper, the paper side punch (two holes) processing and the paper side punch (3 The contents of the hole processing are shown in FIGS. 19 to 21, respectively. FIG. 19 shows the trailing edge punching processing of the sheet according to the present embodiment, and the operation timing at this time is shown in FIG. In FIG. 19, first, after the A clutch 84 is turned on, the punch entrance switch 91 is checked for on / off. And punch entrance switch 9
The punch motor 80 is turned on at the same time as 1 is turned off, and after a lapse of a predetermined time X7, the paper conveyance motor 200 (see FIG. 7) is turned off to stop the paper conveyance. The punch solenoid 191 is turned on at the same time as the stop, and the punching units 171 and 172 are turned on.
The punching process is performed by the (first punching mechanism A).
The predetermined time X7 is determined from the positional relationship between the punch entrance sensor 91 and the punching units 171 and 172 and the sheet conveying speed. After that, when a punch home sensor (not shown) is turned on, the sheet conveyance motor 200 is turned on to start sheet conveyance, and the punching process is ended.

FIG. 20 shows the paper side punch (two holes) processing according to this embodiment. In FIG. 20, first, after the B clutch 87 is turned on, the punch entrance switch 91 is checked for on / off. Then, at the same time when the punch entrance switch 91 is turned off, the punch motor 8
0 is turned on, and after a predetermined time has passed, the paper transport motor 20
0 is turned off and the sheet conveyance is stopped. Simultaneously with the stop, the punch solenoid 191 is turned on, and the punching unit 173 (second
The first punching process is performed by the punching mechanism B). After that, when the punch home sensor 92 is turned on, the paper carrying motor 200 is turned on to carry a predetermined amount of paper, and then the paper carrying motor 200 is turned off again to stop the paper carrying. At the same time as the stop, the punch solenoid 191 is turned on, and the second punching process is performed by the punching unit 173 (second punching mechanism B). After that, when the punch home sensor 92 is turned on, the sheet conveyance motor 200 is turned on to start the sheet conveyance, and the punching process is ended.

FIG. 21 shows the paper side punch (three holes) processing according to the present embodiment, and the operation timing at this time is shown in FIG. 22 (b). In FIG. 21, the punch solenoid 191 is intermittently operated while repeatedly stopping / conveying the sheet.
Is turned on to perform a plurality of perforations. At this time,
The predetermined time X8 is appropriately set for the alignment, the predetermined time X9 is controlled so as to obtain the transport amount matched with the punching pitch, and the predetermined time X10 is the time when the paper is stopped. A punching process is performed. Note that FIG.
21. In FIG. 21, when the punch home sensor 92 cannot detect the completion of the punching process, a punch fail (PUNCH FALE) display is performed.

[Embodiment 4] FIG. 23A is a plan view of a punching device according to the present embodiment, and FIG. 23B is a front view thereof. The basic configuration of the punching device 51 according to the present embodiment is substantially the same as that of the third embodiment, but unlike the third embodiment, the second punching mechanism B is used.
Is a predetermined pitch p that is predetermined along the paper transport direction.
Two punching units 173a and 173b are provided at intervals, and the punching units 173a and 173b are interlocked by a drive transmission mechanism 210 including, for example, a pulley 211 and a timing belt 212. The same constituent elements as those in the third embodiment are designated by the same reference numerals as those in the third embodiment, and detailed description thereof will be omitted here. The home punch sensor is not shown. According to the present embodiment, with respect to the paper side punch (two holes) processing, it is possible to simultaneously perform the two hole punching processing on the paper side only by stopping the paper once. (2 holes) treatment can be realized quickly.

[0048]

As described above, according to the present invention, the first perforation processing mechanism for performing the predetermined perforation processing on the front end portion or the rear end portion in the sheet conveying direction, and the sheet conveying direction. Since it has a second punching mechanism that performs a predetermined punching process on one side in the direction orthogonal to, the front end or the rear end in the sheet conveying direction can be obtained without complicated control. Not only the parts, but also one side part (side part) in the direction orthogonal to the sheet conveying direction can be easily perforated. Therefore, it is possible to easily automate the sheet punching work (particularly, the punching work of a plurality of holes on the side side in the sheet conveying direction) in the mode that had to rely on the hand punching (manual punching work) until now. The work efficiency can be dramatically improved.

Further, in the present invention, if the first punching mechanism and the second punching mechanism are respectively provided with driving means that are independently driven, the switching of the punching positions of the sheet can be performed easily and reliably. Can be realized.

Further, in the present invention, a rotatable pair of punching rolls is used for the first punching mechanism and the second punching mechanism, and the pair of punching rolls is rotated to punch the sheet being conveyed. By performing the processing, it is possible to accurately realize the punching processing of the sheet while avoiding the influence of the stop position error of the sheet due to the temporary stop of the sheet. Particularly, in the second perforation processing mechanism, if the rotation start and stop operations for the pair of perforation rolls are controlled according to the sheet size and perforation conditions, the perforation processing of the sheet is optimized according to the sheet size and perforation conditions. Can be achieved. Further, in the second perforation processing mechanism, if the outer peripheral length of the pair of perforation rolls is made to match the minimum perforation pitch, the driving means is stopped and restarted halfway for the perforation processing of a plurality of minimum perforation pitch intervals. Without controlling, simply by rotating the pair of perforation rolls a predetermined number of times and stopping it, it is possible to easily realize a perforation process with a plurality of minimum perforation pitch intervals, and further improve the perforation pitch accuracy. it can.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a sheet punching device according to the present invention.

FIG. 2 is an explanatory diagram showing an example of an image forming apparatus incorporating the first embodiment of the sheet punching device to which the invention is applied.

FIG. 3 is a front explanatory view of the sheet punching device according to the first embodiment.

4A is a left side view of FIG. 3, FIG. 4B is a right side view of FIG. 3, and FIG. 4C is a cross-sectional explanatory view of FIG.

FIG. 5 is an explanatory diagram showing an outline of operation of a sheet trailing edge punching process.

FIG. 6A is an explanatory diagram showing an outline of operation of paper side punch (two holes) processing, and FIG.
It is explanatory drawing which shows the operation | movement outline | summary of a hole) process.

FIG. 7 is an explanatory diagram showing a sheet punching device used in the first embodiment and a control device for peripheral devices thereof.

FIG. 8 is a flowchart showing the details of punching processing used in the first embodiment.

9 is a flowchart showing the contents of the trailing edge punching process of the sheet of FIG.

FIG. 10 is a flowchart showing the contents of the paper side punch (two holes) processing of FIG.

FIG. 11 is a flowchart showing the contents of the paper side punch (3 holes) processing of FIG.

FIG. 12 is an explanatory diagram showing the sort processing contents of FIG.

FIG. 13 is an explanatory diagram showing the contents of stapling processing when the stapling mode in FIG. 12 is selected.

FIG. 14A is a timing chart showing the operation of the sheet trailing edge punch processing in the first embodiment, FIG. 14B is a timing chart showing the operation of the sheet side punch (two holes) processing, and FIG. 6 is a timing chart showing the operation of punching (3 holes) processing.

FIG. 15 is a flowchart showing the contents of paper side punch (two holes) processing in the control device of the sheet punching device according to the second embodiment.

FIG. 16 is a timing chart showing the operation of the paper side punch (two holes) processing in the second embodiment.

17A is a plan explanatory view of the sheet punching device according to the third embodiment, and FIG. 17B is a front explanatory view thereof.

18A is a right side view of FIG. 17, FIG. 18B is a partially cutaway explanatory view of FIG. 17A, FIG. 18C is an explanatory view showing details of the punching unit, and FIG. FIG.

FIG. 19 is a flowchart showing the contents of the paper trailing edge punching process used in the third embodiment.

FIG. 20 is a flowchart showing the contents of paper side punch (two holes) processing used in the third embodiment.

FIG. 21 is a flowchart showing the contents of paper side punch (3 holes) processing used in the third embodiment.

22A is a timing chart showing the operation of the sheet trailing edge punch processing in Embodiment 3, and FIG. 22B is a timing chart showing the operation of the sheet side punch (three holes) processing.

23A is a plan explanatory view of the sheet punching device according to the fourth embodiment, and FIG. 23B is a front explanatory view thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet conveyance path, 2 ... Sheet, 3 ... 1st perforation processing mechanism, 4 ... 2nd perforation processing mechanism, 5, 6 ... Driving means,
7, 8 ... Pair of perforating rolls, 7a ... Perforating blade, 8a ... Fitting hole,
9 ... Perforation roll pair drive control means, ST ... Perforation stage,
HA, HB ... punching, 22 ... paper, 44 ... sort side conveying path, 71-73 ... punching roll pair, 75 ... punching blade, 77 ...
Fitting hole, 80 ... Punch motor, 84 ... A clutch, 87
... B clutch, 121 ... CPU, 122 ... ROM, 12
3 ... RAM, 171-173 ... punching unit, A ... 1st
Punching mechanism, B ... Second punching mechanism

Claims (5)

[Claims] 1. A sheet punching device, which is installed on a punching stage (ST) in the middle of a sheet transporting path (1) and performs a predetermined punching process on a predetermined portion of a sheet (2) transported by the punching stage (ST). In the apparatus, a first perforation processing mechanism (3) for performing a predetermined perforation processing on a front end portion or a rear end portion of the sheet (2) in the transport direction, and A sheet punching device having a second punching mechanism (4) for performing a predetermined punching process on a side portion. 2. The sheet punching device according to claim 1, further comprising drive means (5, 6) for driving the first punching mechanism (3) and the second punching mechanism (4) independently. A sheet punching device characterized by being provided. 3. The sheet punching device according to claim 1, wherein the first punching mechanism (3) and the second punching mechanism (4) hold the sheet (2) and convey the sheet (2). With a pair of rotating rolls that rotate in the same direction, a punching blade (7a) protruding from one of the rotating rolls, and a fitting hole into which the punching blade (7a) fits into the other rotating roll. (8a) forming a pair of perforation rolls (7, 8), and perforating the sheet (2) being conveyed by rotating the pair of perforation rolls (7, 8). A sheet punching device. 4. The sheet punching device according to claim 1, wherein the second punching mechanism (4) includes a pair of rotating rolls that sandwich the sheet (2) and rotate in the conveying direction of the sheet (2). It has a piercing blade (7
The sheet (2) comprises a pair of perforation rolls (7, 8) formed by projecting a) and forming a fitting hole (8a) into which the perforation blade (7a) fits in the other rotating roll body. A sheet punching device comprising: a punching roll pair drive control means (9) for controlling rotation start and stop of the punching roll pair (7, 8) according to size and punching conditions. 5. The sheet punching device according to claim 5, wherein the outer peripheral length of the pair of punching rolls (7, 8) is matched with the minimum punching pitch.