JPH06286932A - Sheet post-treatment device and image formation device provided therewith - Google Patents

Abstract

PURPOSE:To provide a sheet post-treatment device (output sheet processor) provided with a tub trimmer, with which various tub sheets (classifying sheet) of different tub positions can be formed. CONSTITUTION:A tub trimmer 54 for cutting a sheet for tub to form a tub sheet is provided in a sheet post-treatment device 71 for receiving a sheet on which image formation is already finished, and for carrying out post-treatment therefor, and bundles of post-treated sheets are classified by thus formed tub sheet. Generation of unnecessary tub sheet at the time of using an exclusively used tub sheet and its waste can thus be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet post-processing apparatus having a built-in tab trimmer, and more specifically, for example, a processing apparatus for processing output paper which is image-processed in an image forming section and discharged by various post-processing. Regarding

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus such as a copying machine or a printer, a tab sheet (tab sheet) integrally having tabs has been used for sorting sheets on which images are formed.

[0003]

However, since the above-mentioned tab sheets are generally formed as a set of a plurality of sheets (for example, 5 sheets), unnecessary tab sheets are wasted when sorting is small. It was For example, in the case of three sorting, the remaining two sheets are unnecessary.

It is an object of the present invention to provide a sheet post-processing apparatus (output paper processing apparatus) capable of producing various tab sheets (sorted sheets) having different tab positions.

[0005]

SUMMARY OF THE INVENTION According to the present invention, in a sheet post-processing apparatus using a tab sheet for dividing an image-formed sheet, a plurality of tab sheets to be supplied are sequentially shifted in tab position for each tab sheet. It is characterized in that it is provided with a tab trimmer that is cut so as to be formed.

An image forming section, a supply section for supplying sheets to the image forming section, a stacking section for stacking sheets on which images are formed by the image forming section, and a tab for separating the stacked sheets. A tab paper supply unit for supplying sheets,
The present invention is applicable to an image forming apparatus, which includes a tab trimmer that cuts a plurality of supplied tab sheets in order to shift tab positions for each tab sheet.

Further, a binding means for bundling the sheets is provided on the downstream side of the tab trimmer.

Further, a main path for guiding the sheets to the binding means for bundling the sheet bundle is provided, and the tab trimmer is arranged in the main path. Further, a main path for guiding the sheets to the binding means for bundling the sheets, and a bypass branching from the main path and joining the main path again,
The tab trimer is arranged in the bypass.

Further, the tab positions of the tab trimmer are shifted in the width direction of the sheets so that they do not overlap each other when a plurality of tab sheets are stacked.

Further, the tab trimmer is provided with a cutter capable of shifting in the width direction of the sheet.

Further, the tab positions of the tab sheets are formed so as to be gradually displaced from the initial positions, and when one sheet bundle divided by a plurality of tab sheets is completed, the tab positions are returned to the initial positions again. To prepare for the next sheet bundle.

[0012]

According to the above construction, the image-formed sheet (output sheet) is conveyed in the downstream sheet post-processing device,
It is classified by the tab sheet supplied. In the tab sheet, the tab position is shifted for each tab sheet, and the tab is cut by the tab trimmer.

As a result, sorting papers (tab sheets) of various lengths can be produced, and it is possible to eliminate waste such as preparing tab sheets in advance and discarding tab sheets.

[0014] Also, when receiving a sheet with an image formed by the image forming unit on the downstream side of the sheet post-processing apparatus, the tab sheet supplied from the tab supply unit is cut by displacement of tab positions by tabs trimmer And separate the sheet bundle.

As a result, it is possible to feed the tab sheet created at a predetermined location while performing image formation to separate the sheet bundle.

Further, the sheet bundle can be sorted by the tab sheet formed by the tab trimmer, and can be bound by the binding means provided on the downstream side of the tab trimmer.

[0017]

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

FIG. 1 shows an image forming / sheet post-processing system (apparatus) including an image forming apparatus main body, a sheet feeding section connected to the image forming apparatus main body, an input apparatus having a reading section, and an output sheet processing apparatus according to the present invention. The whole figure is shown.

In FIG. 1, an input device including a paper feed section and a reader section above the paper feed section is connected to the left side position in the figure. The frame 1102 of the sheet feeding unit is the frame 1101 of the main body.
It is constructed independently from. 1103,1104
Is a paper feed table that stores sheets as many sheets,
Reference numeral 1107 denotes a sheet conveying path, 14 denotes a sheet feeding roller for feeding a sheet, and 15 denotes a conveying roller. Reference numeral 11 denotes a pressure plate that presses the document against the platen glass, and 12 denotes an optical system as a reader that optically reads the document. 110
Reference numeral 5 is an optional paper feeding unit.

The paper feed trays 1103 and 1104 are
If you stack tab sheets (tab sheets) described below,
It also functions as a tab sheet supply unit.

In FIG. 1, the main body frame 1101 and the paper feed unit frame 1102 are independent. Paper feeding unit frame 1102
Includes the sheet conveying paths 1107 and 1108 together with the sheet feeding unit.

When a paper jam occurs, the operator
By pulling out the paper feed unit frame integrally from the main body, the sheets accumulated in the paper feed unit are intensively processed.

Further, in the figure, the paper feeding unit frame 1102
Is divided into an upper frame body 1109 and a lower frame body, and each has a structure that can be pulled out / stored in the paper feed unit frame body.

In each configuration, each paper feed tray 110
3, 1104 can be independently pulled out / stored.

A photosensitive drum 21 as an image forming unit is arranged downstream of the paper feeding unit. Reference numeral 35 denotes an optical image based on image information from the optical system 12 and the photosensitive drum 21.
A laser scanner 23 for irradiating the toner, 23 a pre-charger, 24 a developing device for forming a toner image, 26 and 27 registration rollers, 25 a transfer roller for transferring the toner image to a sheet to be fed, 22 a cleaner, 29 Is a conveyance belt, and 30 is a fixing roller for fixing the transferred toner image.

In the finisher 71, 61 is a first intermediate tray provided on the downstream side of the sheet conveying path, and 62 is a second intermediate tray.

The binder 72 indicates a device for pasting a bundle of output paper from the image forming section.

The stacker 73 represents a device for storing output paper.

The sorter (sheet sorter) 75 has a plurality of bins for separating output sheets.

First, the sheet conveying device (sorter) will be described.

Twin Carriage Bundle Conveyor, Larger than Paper Size Stored in Bin. The basic operation of the twin carriage bundle conveying device is described in Japanese Patent Application Laid-Open No. 63-262373 (U.S. Pat.
S. See P4, 900, 009, 1990, 2, 13).

On the other hand, when the sheets are conveyed in a bundle, if the carriages 76 and 77 (FIG. 2) move independently, "slipping through" cannot be performed. Therefore, it is necessary to move at the same time when conveying a bundle, but when the sheets are a bundle, there is a gap between the sheets, so
The productivity of the device is never compromised. For small paper thickness, conventional "slip through" ensures productivity. Carriage 76, 77 for a bundle of sheets
As shown in FIG. 1, the sheet bundles are vertically moved to sort the sheet bundle into desired bin trays 75-1 to 75-15.

Next, the stapler unit of the output paper processing apparatus will be described.

Sheet P sent from arrow 501x in FIG.
Are stacked on the stack tray 62 by the entrance roller 502.
At this time, the skew feed roller 504 regulates the width direction of the paper by an abutting guide (not shown). When a desired number of pages are stacked on the tray, the stopper 505 retreats with the fulcrum 505a as the center of rotation, and the stacked sheets are sent to the stapler (binding unit) 52 by the rollers 504 and stapled. The stapled sheet bundle is further conveyed by the roller 70.

Even when stapling, if output paper is sent, there is no place to store it, so the tray is
It has more than one step. Further, by arranging as shown in FIG. 4, both of the two trays are connected to the stapler simply by rotating the tray.

At this time, since the tray position on the tray inlet roller side does not change, the output paper can be continuously stored. Further, with this configuration, even when an abnormality occurs after this stapling (jam or the like), one of the trays can be used as the escape tray because there are two stages of this tray. That is,
By sending accumulated paper etc. to this escape tray,
The processing location, processing time, etc. during JAM processing can be reduced.

Next, the gluing device of the output paper processing device will be described.

The paper bundle sent to the gluing device is sent in parallel (FIG. 5). However, it is easy to perform gluing in the vertical direction (FIG. 6), and therefore, the unbound output paper bundle must be changed in direction by 90 ° (horizontal → vertical). Also, when ejecting from this gluing device, it is necessary to rotate 90 ° (vertical → horizontal) again because it is good to perform it in the lateral direction for the adjacent stacker or the like.

The unstitched output sheet bundle P sent from the arrow 702x in FIG. 7 is sandwiched by the pair of conveyor belts 702 whose spacing can be freely changed, and hits the stopper 703 retractable in the direction of the arrow 703x. Pair 702 stops moving. The belt pair 702 is formed by a pressure mechanism (not shown).
Pressure is applied with an appropriate force in the arrow 704x direction. Illustration of the operating mechanism of the belt pair 702 and the like is omitted.

It is possible to move to the position shown in FIG. 8 by a link mechanism or a hinge mechanism, and at this time, the output sheet bundle P changes its direction from the horizontal direction to the vertical direction. At this time, the belt pair is further pinched in the direction of 702x ', and at the same time, the stopper 7
03 is retracted and the belt is rotated in the direction of arrow 702y.

The tape 7 is guided by the guide 704, and the tip of the tape 705 (the upper surface is "paste" and the lower surface is "paper") is guided 7
Push in direction 06. Further, by rotating the belt 702, the sheet bundle is landed on the heater 707. When the tape glue is melted and attached, reverse the pair of belts 702,
When the output sheet bundle P is returned to the original position, it returns to the position shown in FIG. 7 and sends out the output sheet bundle glued in the direction of the arrow 701.

The sheet storage device (stacker) will be described.

In FIGS. 9, 10 and 11, when the number of sheets is one, the sheet is offset by a skew feed roller or the like, and when there are a plurality of sheets, the discharge roller 703 is moved in the thrust direction for offsetting.

If the two are made to be the same, (1) if there is a thickness, offset cannot be performed by the skew feed roller. (2) When the number of sheets is one, if the discharge roller is moved to the thrust, it will not be in time.

Therefore, a means for switching the offset means according to one sheet or a sheet bundle is necessary.

The bundle conveyance / single sheet conveyance possible path will be described.

FIG. 12 shows a single sheet conveyance, and FIG. 13 shows a bundle conveyance. When carrying a bundle, the guides and the like are moved upward together with the rollers.

If the roller is a large roller, the original conveying path is widened accordingly, which is an obstacle when conveying one sheet. Therefore, the smaller roller is preferable.

The connection path will be described.

FIG. 14 shows a connecting path for conveying sheets to the sheet sorting apparatus. The connecting path has a plurality of transport paths for sorting sheets (sheets) into a plurality of bins,
A straight path 708 is provided in the center conveyance path. The straight path 708 has a roller pair and a conveyor belt, and is connected to a sort path (straight path) having a high bundle conveying capacity on the upstream side. By doing so, as shown in FIG. 15, another sorter (second sheet) is provided on the upstream side of the sorter (first sheet post-processing apparatus) 75 (FIG. 1).
Sheet post-processing device) 175 can be interrupted and connected.

When the conveyed sheets are not sorted by the preceding sheet sorting device 175, the sheet or the sheet bundle may interfere with the processing of the next sheet unless the sheet or the sheet bundle passes through the preceding sheet sorting device quickly. .

This embodiment (FIG. 15) provides a sheet sorting apparatus in which the sheets are transported at a high speed when the sheets are transported to the downstream side without being sorted in the preceding sheet sorting apparatus, and the capability of the apparatus is improved. can do.

FIG. 16 shows a modification of FIG.
An example in which a sorter 275 provided with a straight path (belt) 708 is connected to a part of the bin tray of the sorter 75 of FIG. 1 is shown.

FIG. 17 is a schematic diagram of an output paper processing apparatus in which the arrangement of a plurality of processing mechanisms is improved. By arranging the Z-folding device, saddle stitcher, stapler, inserter, etc. as shown in FIG. 17, the sheet can be discharged from one outlet, and the sheet can be taken out conveniently. The inserter is for feeding sheets of different colors for sorting.

In the output paper processing apparatus 80 of the present invention,
(1) The pair of rollers 209 described in the saddle stitcher and (2) the pair of rollers 214 and 215 described in the Z-fold are
Both have a length equal to or larger than the paper width (l _G > l _{P in} FIG. 26), and the pressure contact force is large.

The structure of the saddle stitcher will be described.

After passing through the paper guide plate 201, the sheet P (FIG. 18) exits the discharge roller 202 and is stacked on the stitcher tray 203. A paper stopper 205 and a paper adjusting plate 205 that moves in the direction of arrow 205x to arrange and stack paper
When the stapler 206 is prepared in advance at a position half the length l (= l / 2) of the sheet P regulated by
9 is stapled.

After that, the stitcher tray 203 moves in the direction of the arrow 203x, and the half position of the sheet P (the stapling position) comes just below the saddle knife 207 (FIG. 20). Saddle knife 207 and folding roller 20
8. Folding roller 209 is as shown in FIG.
The folding roller 208 is a rubber roller arranged in a dumpling shape,
The saddle knife 207 can be put in the place without the rubber (temporary folding). The folding roller 209
Has a rubber portion having a width equal to or larger than the paper width, and the pressing force is much larger than that of the folding roller 208, and this roller completely saddle-folds the sheet P. After folding, the sheet bundle is pass 22
It may be conveyed to the next process through 0, or flapper 219
Alternatively, the sheets may be stacked on the stacker.

Next, the structure of Z-folding will be described.

The sheet P coming in from the arrow 210x in FIG. 22 (in FIG. 23, the rotation direction of the roller) is 211, 21.
After passing through the roller pair 2 (for the sake of explanation, here, A3
It is assumed that the paper is Z-folded on A4 paper) and is conveyed until it hits a stopper 213. Then on the pass 21
The sheet P of A3 starts to form a loop in the space of 1 (the distance between the rollers 211 and 212 and the stopper 213 is set to be shorter than A3 length 1 = 420, and 214 and 2
15 roller pairs are set so that the length of A3 is 3/4).

The sheet P has a shape as shown in FIG.
It touches the roller pair 215. Here, the sheet P is pulled by the rollers 214 and 215, and when the sheet P exits this roller, A
The 3 sheet P'is folded 1/4 of its length.

Further forward, the sheet P ′ is struck by the stopper 216 and becomes the sheet P ″ Z-folded by the pair of rollers 214 and 215 similarly to the above-described movement (FIG. 25).

At this time, in the folding rollers 214, 215, 217, 214 and 215, and 214 and 217 have rubber portions having a length equal to or larger than the paper width, and the pressure contact force is sufficiently large to fold the sheet P with this roller. There is.

FIG. 27 is a plan view of a letter size sheet to be folded, FIG. 28 is a plan view of a legal size sheet, and FIG. 29 is a plan view of a folded sheet.

The tab trimmer 54 of the output paper processing apparatus will be described.

Up to now, in order to put the sorting paper into the copying machine or the printer, the tab paper with tabs as shown in FIG. 31 has been required.

Furthermore, the length of the tab portion is fixed (see FIG. 31).
If there are few sorts, tab paper that is unnecessary is wasted (if there are three sorts, the remaining two are unnecessary). By providing the vertically movable cutters 1 and 2 as shown in FIG. 32 in the output paper processing device, it is possible to make sorting papers with various tab lengths, and to prepare tab papers in advance,
There is no need to throw away waste tab paper.

In FIG. 33, the sheet P that has passed through the pair of entrance rollers 401 is conveyed by the skew feed roller 402 and the stopper 403.
Stopper 40 that can be withdrawn and regulated
Sent up to 4. The sheet P is cut by the replaceable blades 406a and 407a on the cutter bases 406 and 407, respectively, which are movable in the arrow 405x direction, so that the sheet P becomes a sorting sheet having a tab portion. The cutter bases 406 and 407 can be moved in the direction of arrow 410x, and press-cut the sheet with a receiving base (not shown). After being cut, the stopper 404 retracts under the paper guide 408,
The second roller and the outlet roller 409 start conveying again.

In FIG. 35, the tab trimmer 400 is not arranged in the bypass 400B as in FIG. 34, but is arranged in the main path 400A.

Next, the details of the tab trimmer 400 will be described.

A tab sheet is stored in any of the sheet feeding units 1103 and 1104 of FIG. 1, and a tab storage completion button (not shown) is pressed to notify that the tab sheet is stored. In this case, the sheet feeding units 1103 and 1104 also serve as tab sheet feeding units that feed tab sheets. Alternatively, a tab sheet supply tab (tab sheet supply unit) 450 (see FIG. 3)
0) is provided in the finisher 71 or the sheet feeding unit 13,
If there is a tab sheet, a signal "tab present" may be output. Here, the tab sheet is a sheet of a slightly larger size so that only the tab portion protrudes from the divided image-formed sheet.

A tab signal is input from a main body control unit (CPU) (not shown) at a predetermined time (number of sheets) while sheets are being stacked on the storage tray 62 for the stapler as image formation progresses. Then, the tab sheet is fed, and the tab sheet is cut by the tab trimmer 54 so that the tab is formed at an appropriate position. After cutting the tabs, the tab sheets are fed and stacked on the sheet bundle.

After that, the image formation proceeds again, and the sheet bundle is similarly stacked on the tab sheet of the storage tray 62. After that, similarly, when the tab signal is input, the next tab sheet is fed. Thereafter, similarly, a sheet bundle separated by tab sheets is formed.

This sheet bundle is sent to the stapler,
Bound. As a result, a sheet bundle separated by a plurality of tab sheets is completed. After that, the sheet is sent to an appropriate sheet post-processing apparatus, and if necessary, the sheet post-processing apparatus (gluing, sorting of sorts, etc.).

According to the tab trimmer device of the present embodiment, tabs are formed in the order of 1, 2, 3, 4, 5 by shifting from the top, and then the tabs are moved back to the top of 6, 7, 8 ... The tabs are formed by shifting the tab positions.

When the sheet bundle separated by a series of tab sheets is completed, the tab memory (not shown) is cleared, and when the formation of the next sheet bundle is started, the sheets 1, 2, ...
A tab sheet of a new group is formed by shifting the tab positions like 3, 4, ....

The sheet receiving port (entrance) and the sheet passing port (exit) will be described.

As described above, a plurality of copy paper processing devices (staplers / binders / stackers / sorters / sorters) connected to the main body of the image forming unit such as a copying machine and a printer are
Sheet / sheet bundle receiving port (71A, 72A, 73
A, 75A, 80A, 175A, 275A) and sheet passing ports (71B, 72B, 73B, 75B, 80B,
By aligning the heights of 175B and 275B to the same height, it becomes possible to freely combine the respective devices.

Further, the sheet discharge port 1101B of the image forming unit main body
By adjusting the height of the sheet to the next sheet receiving port, the combination including the main body becomes possible (for example, the main body and the stacker, the main body and the sorter, etc.).

Similarly, the sheet feeding device also receives its inlets 1105A and 1102A and its outlets 1105B and 11B.
By matching the heights of 02B, they can be freely connected to each other, and further, the sheet receiving port 1101A of the image forming apparatus.
And the heights are the same, any combination is free.

In the figure, the finisher, the binder, the stacker, the folder, the sorter, etc. are copy paper processing devices each having an independent frame, and the heights of the entrances and exits of the respective devices are the same. For example, combinations such as no binder, one stacker, and no sorter are possible. The same applies to the paper feeding device. In particular, it is possible to easily change the order as well as simply changing the combination of the sheet post-processing devices. This is called the lineup.

Here, the apparatus for receiving and post-processing the image-formed sheet is referred to as a first sheet post-processing apparatus, and the apparatus for receiving and post-processing the sheet controlled by the first sheet post-processing apparatus is A second sheet post-processing apparatus is used, and both the first and second sheet post-processing apparatuses can carry a sheet bundle.

The registration mechanism will be described.

36 to 38 show views relating to the registration 27 of FIG.

In FIG. 36, the sheet 1001 is fed from the direction of the arrow in the figure. Conveyor roller pair 1002 (2
7) is supported by the frame 1011 and the support plate 1010. Sensors 1003 and 1004 are arranged in front of the pair of conveying rollers 1002 at right angles to the sheet conveying direction. A motor 1006 is locked to the support plate 1010 via a screw 1006A. A gear 1009 is attached to one end of the transport roller pair 1002, meshes with a gear of the motor 1007, and is rotationally driven by the motor 1007.

At the other end of the roller 1002, the roller 110
2, the bearing 1012 is attached so that there is almost no play in the thrust direction. The bearing 1012 is connected to the motor 1008 via a screw 1008A. The sheet 1 is provided on the downstream side of the roller 1002.
CCD sensor 1 for detecting the sheet at the edge of 001
005 is provided.

The operation of the sheet 1001 will be described with reference to FIG. 37. The inclination of the leading edge of the sheet 1001 is detected by the sensors 1003 and 1004. In accordance with the tilt calculated by a calculation mechanism (not shown), the motor 1006 rotationally moves around a rotation center (not shown) so that the nip line of the roller pair 1002 is tilted until it becomes parallel to the leading edge of the sheet that enters. (This operation is of course the seat 100
1 is performed before entering the nip line of the roller 1002).

After the sheet 1001 enters the nip of the roller 1002, the motor 1006 is rotationally driven so that the nip line of the roller 1002 is rotated at right angles to the correct sheet conveying direction. Since the roller 1002 sandwiches the sheet, the sheet is also perpendicular to the conveying direction. Depending on the direction in which the roller is rotated, the sheet must be pulled in the conveying direction. At that time, the rotation speed of the roller may be slightly slowed to loosen the sheet.

Further, when the sheet 1001 advances, the sensor 1005 detects the position of the end portion of the sheet 1001. The sensor 1005 is preferably a CCD or the like.
According to the detected position in the width direction of the sheet, the roller 10
The shift amount of 02 is calculated by an arithmetic mechanism (not shown),
The motor 1008 is driven. The screw 1008A is rotated by the drive of the motor 1008, and the bearing 1012,
The roller 1002 is moved in the thrust direction. As a result, the thrust position of the sheet is corrected.

Further, the shift in the sheet conveying direction with respect to the image formed by the image forming unit (not shown) is calculated according to the timing when the front end of the sheet crosses the sensor 1005, and the rotation speed of the motor 1007 is appropriately adjusted. By doing so, it is possible to correct the deviation.

The series of operations can be performed without stopping the rotation of the roller pair 1002. Therefore, it is particularly effective for a machine having a high-speed sheet feeding, a digital optical signal image forming means (laser, LED element array), and a sheet feeding mechanism having a short interval between sheets.

FIG. 38 shows another embodiment in which a pair of rollers 1002a for correcting the inclination of the sheet and a pair of rollers 1002b for correcting the thrust position located downstream thereof are separately formed. . By forming in this way, it becomes easy to apply the registration mechanisms 26 and 27 to a machine that feeds a short sheet in the conveying direction at high speed.

[0093]

As described above, according to the present invention,
Since a tab trimmer that shifts the tab position and cuts is arranged in the sheet post-processing apparatus that post-processes the sheets that have been image-formed and received, a plurality of sheet bundles that are carried into the sheet post-processing apparatus are exclusively It is possible to divide without using a tab sheet, and it is possible to eliminate the generation of unnecessary tab sheets and the waste thereof when a dedicated tab sheet is used.

Further, in an apparatus in which the sheet post-processing apparatus is connected to, for example, an image forming apparatus to receive the sheets, the sheet post-processing apparatus on the downstream side sorts the sheet bundle while forming an image. be able to.

The tab trimmer may be provided in the sheet conveying path of the sheet post-processing apparatus to form a tab on the image forming sheet, and the tab for supplying the tab sheet to the sheet conveying path may be formed. It is possible to form tabs on other tab sheets (for example, colored ones) supplied from the sheet supply section and easily carry the tab sheet between the sheet bundles.

Further, since the binding means for bundling the sheet bundle is arranged on the downstream side of the tab trimmer, the sheet bundle carried into the sheet post-processing device is sorted by the tab sheet and also by the binding means. Can be bundled.

[Brief description of drawings]

FIG. 1 is an image forming apparatus main body and an output paper processing apparatus (sheet post-processing apparatus) to which a sheet post-processing apparatus of the present invention is applied.
Overall view of image forming / post-processing equipment equipped with

FIG. 2 is a side view of the carriage of the sorter (post-processing device) section.

FIG. 3 is a side view of the stapler section as well.

FIG. 4 is a side view of the stapler section.

FIG. 5 is a side view of an output sheet bundle.

FIG. 6 is a side view of the gluing device section.

FIG. 7: Side view of gluing part

FIG. 8: Side view of gluing part

FIG. 9 is a perspective view of the leading edge / side regulating member of the seat.

FIG. 10 is a side view of the stacker.

FIG. 11 is a side view of the stacker.

FIG. 12 is a side view of the transport rollers of the stacker.

FIG. 13 is a side view of transport rollers of the stacker.

FIG. 14 is a side view of a connecting path of a sorter (post-processing device).

15 is an overall view of the apparatus of FIG. 1 with a sorter provided with the connecting path portion of FIG. 14 inserted.

16 is an overall view of an image forming / post-processing apparatus in which another sorter having a connecting path portion is connected in place of the finisher, binder, and stacker of the apparatus of FIG.

FIG. 17 is a schematic diagram of an output paper processing unit according to the present embodiment including a plurality of output paper processing units.

FIG. 18 is a side view of the saddle stitcher part.

FIG. 19 is a plan view of a stapled sheet.

FIG. 20 is a side view of the saddle stitcher.

FIG. 21 is a perspective view of a saddle stitcher.

FIG. 22 is a side view of the Z-folded portion.

FIG. 23 is a side view of the Z-folded portion.

FIG. 24 is a side view of the Z-folded portion.

FIG. 25 is a side view of the Z-folded portion.

FIG. 26 is a front view of a roller pair of a paper folding unit.

FIG. 27 is a plan view of a sheet to be folded.

FIG. 28 is a plan view of a sheet to be folded.

FIG. 29 is a plan view of a sheet to be folded.

FIG. 30 is an overall view of an image forming / post-processing apparatus including a post-processing apparatus including a tab trimmer, a stacker, and an image forming apparatus main body.

FIG. 31 is a perspective view of a tab sheet

FIG. 32 is a plan view of a sorting paper and a cutter.

FIG. 33 is a perspective view of a tab trimmer device.

FIG. 34 is a perspective view of a tab trimmer device.

FIG. 35 is a side view of another tab trimmer.

FIG. 36 is a plan view of the registration device.

FIG. 37 is a function diagram of the registration device

FIG. 38 is a plan view showing another embodiment of registration.

[Explanation of symbols]

P sheet T tab sheet (tab sheet) 13 sheet feeding section 21 photosensitive drum (image forming section) 27 conveying roller pair 52 stapler 54 trimmer unit (tab trimmer) 61 first intermediate tray 62 second intermediate tray 71 finishers 71A, 72A, 73A, 75A, 80A, 175A,
275A sheet receiving port 71A, 72A, 73A, 75A, 80A, 175A,
275A Sheet transfer port 72 Binder 73 Stacker 75 Sorter (sheet sorting device) 75-1 to 75-15 Bin tray 76, 77 Sorter carriage 80 Output paper processing device 175 Sorter (sheet sorting device) 206 Stapler 208, 209 Folding roller 275 Sorter (Sheet Sorting Device) 406a, 407a Cutter 450 Tab Sheet Supply Unit 702 Conveying Belt 705 for Sheet Bundle Holding Tape 707 Glue 708 Heater 708 Straight Path (Connecting Path) Sheet Conveying Means 1002 Conveying Roller Pairs (Registration Roller Pairs) 1006, 1007 , 1008 Motors 1103, 1104 Paper feed table (also serves as tab sheet supply unit) 1107 Sheet transport path 1101 Main body frame body (image forming apparatus main body) 1102 Paper feed unit frame body (paper feed unit main body) 1105 Optional Paper feed section

Front page continuation (72) Inventor Yuji Takahashi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinichi Tanada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yoshikuni Toyama 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (8)

[Claims] 1. A sheet post-processing apparatus using a tab sheet for dividing an image-formed sheet, wherein a plurality of tab sheets to be supplied are cut so that tab positions are sequentially shifted for each tab sheet. A sheet post-processing apparatus comprising: 2. An image forming unit, a supply unit that supplies sheets to the image forming unit, a stacking unit that stacks sheets on which images are formed by the image forming unit, and a tab that separates the stacked sheets. An image forming apparatus comprising: a tab sheet supply unit that supplies a sheet; and a tab trimmer that cuts a plurality of supplied tab sheets to shift tab positions in order for each tab sheet. 3. The sheet post-processing apparatus according to claim 1, further comprising a binding unit that binds sheets on the downstream side of the tab trimmer. 4. The sheet post-processing apparatus according to claim 3, wherein a main path for guiding the sheets to the binding means for bundling the sheet bundle is provided, and the tab trimmer is arranged in the main path. 5. A tab path trimmer is provided in the bypass, and a main path that guides the sheets to the binding means for bundling the sheets and a bypass that branches from the main path and joins the main path again are provided. The sheet post-processing device according to claim 3. 6. The tab position of the tab trimmer is shifted in the width direction of the sheets so that the tab positions do not overlap each other when a plurality of tab sheets are stacked. Sheet post-processing apparatus and image forming apparatus. 7. The tab trimmer comprises a cutter capable of shifting in the width direction of the sheet.
The sheet post-processing apparatus and the image forming apparatus according to item 1. 8. The tab position of the tab sheet is formed so as to gradually deviate from the initial position, and when one sheet bundle divided by a plurality of tab sheets is completed, the tab position returns to the initial position again. The sheet post-processing apparatus and the image forming apparatus according to claim 1, wherein the sheet post-processing apparatus and the image forming apparatus are provided for the next sheet bundle.