JP4869156B2 - Image forming system - Google Patents

Description

  The present invention relates to an image forming system in which a sheet conveyed from an image forming apparatus such as a copying machine or a printer is selectively conveyed to a bookbinding apparatus and bound, or is conveyed to a large capacity storage stacker and stored. The present invention relates to an improvement of a stack mechanism for storing a sheet bundle bound with an adhesive in a large-capacity stacker.

  In general, this type of image forming system is widely known to have a layout configuration in which an image forming apparatus, a bookbinding apparatus, and a large-capacity stacking apparatus each individually configured as a unit are arranged on the downstream side in the sheet conveying direction.

  For example, Patent Document 1 discloses an apparatus configuration in which a bookbinding device is disposed at a paper discharge port of an image forming apparatus, and a stack device is connected to the paper discharge port of the bookbinding device. The image forming apparatus continuously forms an image at a high speed, and the bookbinding apparatus aligns the sheets from the image forming apparatus in a bundle and applies adhesive, and the sheet bundle is bound and bound on a cover sheet to form a booklet. To cover. The stack apparatus is often used as a system for receiving and stacking an image-formed sheet from a bypass path formed in the bookbinding apparatus.

  Patent Document 2 also discloses a similar device system. The bookbinding apparatus of the same document aligns the sheets from the image forming apparatus, applies an adhesive to the back binding end surface, binds the sheet bundle (saddle stitching sheet) and the cover sheet in an inverted T shape, A bookbinding mechanism is disclosed in which a cover sheet is folded back so as to be processed as a booklet.

  On the other hand, a tray device for storing sheets carried out at a high speed from the image forming apparatus includes an elevating mechanism for lowering the stacking tray according to the stacking amount and an alignment mechanism for orderly aligning the stacked sheets so as not to collapse the load. The large-capacity stack device is also widely known.

  In such a system configuration, the image forming apparatus is required to stably form an image at high speed, the bookbinding apparatus is required to have a finishing process with high finishing accuracy, and the stacking apparatus neatly accommodates a large capacity sheet. It is requested. Therefore, the conventional apparatus systems of Patent Documents 1 and 2 store sheets that are not bound (hereinafter simply referred to as “single sheets”) and sheet bundles that are bound (hereinafter referred to as “bound sheet bundles”) in individual stackers. The structure is adopted. Then, the “single sheet” is transferred from the image forming apparatus across the bookbinding apparatus to the stacking apparatus, and the stacking apparatus is provided with tray means that descends according to the loading amount, and alignment means that aligns the sheets on the tray means. Yes. On the other hand, in the bookbinding apparatus, “single sheets” are arranged in a bundle, and an adhesive (hot melt paste) is applied to the spine end face, and this is bound to a cover sheet and bound. Thereafter, the booklet-like sheet bundle is trimmed and stored in the bookbinding stack means.

The arrangement of the two stack devices in the device system in this way is because a stack device having a configuration suitable for each is required. In other words, the former ("sheet" storage) requires high-speed and large-capacity printing processing, and stacking means suitable for this is required, while the latter ("sheet bundle" storage) requires time for bookbinding processing and is carried out. Since the bundles of sheets are different in bundle thickness, a configuration suitable for this is required.
JP 2004-209869 A JP 2005-305822 A

  As described above, a system configuration in which a bookbinding apparatus that binds sheets from an image forming apparatus and a stack apparatus that continuously stores a large amount of sheets is connected is disclosed in Patent Documents 1 and 2 described above. As shown, the “single sheet” stacking device and the “bookbinding sheet bundle” stacking device are individually arranged, and the stacking mechanisms thereof are different.

  Therefore, it is known that the conventional system configuration is large in size and expensive. On the other hand, in the recent on-demand printing system, the sheet bundle to be bound is required to continuously process a large volume, and the stack mechanism of the “bookbinding sheet bundle” is also required to be enlarged. In particular, the conventional stack mechanism has many problems in order to operate the system continuously without an operator's work.

  In view of this, the present inventor has provided a single large-capacity stacking apparatus, and has come to focus on accommodating a “single sheet” and a “bookbinding sheet bundle”. In this case, for storing the “single sheet”, alignment means for aligning the sheets stacked on the tray is required. On the other hand, in the “bookbinding sheet bundle”, it is efficient to completely solidify the adhesive that has been bound on the tray. For this reason, there arises a problem that the adhesive of the bookbinding sheet bundle adheres to the aligning means. Further, when the “bookbinding sheet bundle” is transported from the bookbinding processing unit to the stack tray, there is a problem that the front mounting surface such as a bend and a wrinkle is destroyed.

Accordingly, it is a main object of the present invention to provide an image forming system capable of storing sheets from the image forming apparatus directly into a single stack apparatus and simultaneously storing a bundle of sheets that have been bound into a booklet. Yes.
Another object of the present invention is to provide an image forming system capable of storing a large capacity in an orderly manner without destroying the front surface of the bound sheet bundle.

The present invention adopts the following configuration in order to solve the above problems.
An image forming apparatus, a bookbinding apparatus, and a stacking apparatus are arranged in this order in the sheet conveying direction, and the image forming apparatus has image forming means for sequentially forming images on sheets, and the bookbinding apparatus is a sheet from the image forming apparatus. The stacking device is provided with lifting / lowering tray means for raising and lowering the sheet according to the stacking amount, and the sheet from the image forming apparatus is removed. An image forming system provided with a sheet carry-in path that selectively guides to the bookbinding apparatus or the stack apparatus, wherein the sheet carry-in path feeds the sheet from the image forming apparatus to the adhesive application means or the elevating / lowering means. It arrange | positions in the said bookbinding apparatus so that it may guide to a tray means. The bookbinding apparatus is provided with a sheet bundle carrying-out path for guiding the bundle of bound sheets from the adhesive application means to the lifting tray means, and the stacking apparatus is configured to store sheets or sheet bundles accommodated in the lifting tray means. An aligning means for aligning the side edges is provided, and the aligning means is (1) configured to be aligned at a side edge position different from the spine end face of the sheet bundle carried out from the bookbinding apparatus. Or (2) When the sheet bundle is unloaded from the bookbinding apparatus onto the lift tray means, the sheet stacking apparatus is configured to stand by at a standby position retracted from the side edge of the sheet bundle.

  The aligning means is disposed between a sheet discharge outlet through which the sheet or sheet bundle is carried out and the elevating tray means, and the aligning means has a side edge of the sheet or sheet bundle carried out from the sheet discharge outlet. An alignment member that regulates and narrows the width is provided, and the alignment member is disposed at a position that regulates a side edge different from the spine end face of the sheet bundle.

  The aligning means includes an aligning member that regulates the position of the side edge of the sheet or sheet bundle, and a shift means that moves the aligning member between an aligning position that abuts the sheet side edge and a standby position that is spaced apart from the aligning position. The shift unit causes the alignment member to stand by at a standby position when the sheet bundle is carried out from the bookbinding apparatus to the lift tray unit.

  The sheet carry-in path is configured to convey a sheet from the image forming apparatus to the stack apparatus across the bookbinding apparatus between a carry-in port and a paper discharge port arranged in the bookbinding apparatus, and the bonding The agent applying means is arranged in the bookbinding path branched from the sheet carry-in path. The sheet bundle unloading path is configured to unload the bookbinding sheet bundle from the bookbinding processing path to the paper discharge port, and the bookbinding process path or the sheet bundle unloading path has an attitude of the bookbinding sheet bundle. The sheet bundle deflecting means carries out the sheet bundle deflecting means to the sheet bundle carrying-out path in such a posture that the spine end face of the sheet bundle is located on the leading end side in the conveying direction.

  The bookbinding apparatus is provided with bookbinding stack means for storing a sheet bundle that has been subjected to bookbinding processing from the bookbinding path, and the sheet bundle is selectively carried out to the bookbinding stack means and the sheet bundle carry-out path in the bookbinding path. Route switching means is arranged.

  The path switching means includes a discrimination means for unloading the sheet bundle to the bookbinding stack means or the sheet bundle unloading path in accordance with the bundle thickness of the sheet bundle that has been bound by the bookbinding path or the number of sheets constituting the sheet bundle. Prepare.

  The determination unit is configured to prohibit the sheet bundle from being carried out to the sheet bundle carrying-out path when the bundle thickness of the sheet bundle is a predetermined thickness or more or when the number of sheets constituting the sheet bundle is a predetermined number or more. To do.

  A post-processing device is connected to the stack device on the downstream side in the sheet conveying direction, and the stack device is provided with a bypass path for transferring a sheet from the discharge port to the post-processing device. Post-processing means for post-processing the sheet from the bypass path is provided. This post-processing means comprises a stapling means for binding sheets from the bypass path into a bundle, a punch means for punching processing, or a stamp means for stamping.

  The present invention relates to a system configuration in which an image forming apparatus, a bookbinding apparatus, and a stack apparatus are arranged in this order in the sheet conveyance direction, a path for carrying a sheet from the image forming apparatus to a stack apparatus arranged on the downstream side, and a sheet bundle subjected to bookbinding processing And (2) bookbinding in which the aligning means disposed in the stacking device is (1) width-aligned and aligned at a side edge position different from the spine end face of the bookbinding sheet bundle. When the processed sheet bundle is carried out onto the lift tray means, it is configured to stand by at the standby position retracted from the side edge of the sheet bundle.

  The aligning means for aligning and aligning the sheets falling from the sheet discharge port to the tray means is arranged at a position different from the spine end face of the bookbinding-processed sheet bundle, or waits at a standby position separated from the sheet bundle. . For this reason, even if the adhesive for bookbinding is carried out in a state where the adhesive is not completely solidified, the adhesive adheres to the aligning means and is not contaminated, nor does it cause unloading failure (jam).

  Accordingly, since a single sheet and a sheet bundle can be accommodated in a single stacking device, the system can be made compact and compact, and the installation space can be reduced. At the same time, the system can be provided at a low cost.

  Further, when carrying out the bookbinding-processed sheet bundle from the bookbinding processing unit to the stack tray, it is conveyed in a posture in which the spine end face is positioned at the tip, so that the surface mounting surface is not lost in the carrying-out process. For this purpose, the present invention has a remarkable effect, for example, it can be configured with a simple structure by arranging a posture deflection means for deflecting the posture of the sheet bundle in the bookbinding processing section.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is an overall configuration diagram of an image forming system according to the present invention. 2 is an explanatory view showing an embodiment of the bookbinding apparatus in the system of FIG. 1, and FIG. 3 is an explanatory view showing a form of the bookbinding apparatus different from FIG.

"Description of System Configuration"
As shown in FIG. 1, the image forming system according to the present invention includes an “image forming apparatus A”, a “bookbinding apparatus B”, and a “large capacity stack apparatus C”. These apparatuses are sequentially arranged in this order in the sheet conveying direction. In the illustrated system, a post-processing device D is arranged further downstream of the large-capacity stacking device C.

  The image forming apparatus A includes image forming means for forming an image on a sheet. The bookbinding apparatus B includes an adhesive application unit 55 that applies the adhesive by aligning the sheets from the image forming apparatus A in a bundle, and a sheet carry-in path 31 that is connected to the paper discharge port 14 of the image forming apparatus A is provided. It has been. The large-capacity stacking device C extended to the bookbinding device B is extended to the sheet carry-in path 31 and includes an elevating tray 85 and an aligning means 93 for aligning sheets on the elevating tray. The post-processing apparatus D extends downstream from the large-capacity stack apparatus C, receives a sheet from the image forming apparatus A via the bookbinding apparatus B and the large-capacity stack apparatus C, and performs post-processing on the sheet. It is configured as follows. The detailed configuration of each device will be described later.

Therefore, the present invention carries the bookbinding sheet bundle (hereinafter referred to as “sheet bundle”) from the bookbinding apparatus B and the sheet (hereinafter referred to as “single sheet”) not subjected to bookbinding processing from the image forming apparatus A to the large-capacity stacking apparatus C. Configure as follows. Then, the aligning means 93 provided in the large-capacity stacking apparatus C and aligning and aligning single sheets or sheet bundles (hereinafter collectively referred to as “sheets”) from the sheet discharge outlet 84 has the following configuration. It is a feature.
This aligning means 93 is configured to (1) width-align and align at a side edge position different from the spine end face of the sheet bundle carried out from the bookbinding apparatus B. Alternatively, (2) when the sheet bundle is unloaded from the bookbinding apparatus B onto the lifting tray 85, it is configured to stand by at a standby position retracted from the sheet bundle side edge.

  That is, the system shown in FIG. 1 is configured to store a sheet bundle that has been bound by the bookbinding apparatus B at the same time as a single sheet from the image forming apparatus A is stored in an elevating tray 85 described later. For this reason, the bookbinding apparatus B is provided with a sheet bundle carrying-out path 110 for carrying out the sheet bundle from the bookbinding processing path 33 to the lifting tray 85. The sheet bundle carrying-out path 110 carries out the sheet bundle in a posture in which the back binding end surface Sx is positioned forward in the conveying direction. For this purpose, the bookbinding processing path 33 is provided with sheet bundle deflecting means (a bundle attitude deflecting means 64, which will be described later, and a paper discharge roller unit 117). The configuration of each device will be described below.

[Configuration of Image Forming Apparatus]
The configuration of the image forming apparatus A will be described. As the image forming apparatus A, various structures such as a copying machine, a printer, and a printing machine can be adopted, but an electrostatic printing apparatus is illustrated. In the image forming apparatus A, a paper feed unit 2, a printing unit 3, a paper discharge unit 4, and a control unit are built in a casing 1. A plurality of cassettes 5 corresponding to the sheet size are prepared in the sheet feeding unit 2, and a sheet having a size designated by the control unit is fed out to the sheet feeding path 6. A registration roller 7 is provided in the sheet feeding path 6 and the sheet is fed to the downstream printing unit 3 at a predetermined timing after the leading edges of the sheets are aligned.

  The printing unit 3 is provided with an electrostatic drum 10. A print head 9, a developing device 11, a transfer charger 12, and the like are disposed around the electrostatic drum 10. The print head 9 is composed of, for example, a laser light emitter, and forms an electrostatic latent image on the electrostatic drum 10. A toner ink is attached to the latent image by the developing device 11 and printed on a sheet by the transfer charger 12. . This print sheet is fixed by the fixing device 13 and carried out to the paper discharge path 17. The paper discharge unit 4 is provided with a paper discharge port 14 and a paper discharge roller 15 formed in the casing 1. Reference numeral 16 denotes a circulation path. The print sheet from the paper discharge path 17 is turned upside down on the switchback path and then sent to the registration roller 7 again to form an image on the back surface of the print sheet. In this way, the print sheet on which one side or both sides are formed is carried out from the paper discharge port 14 by the paper discharge roller 15.

  In the figure, reference numeral 20 denotes a scanner unit which optically reads a document image to be printed by the print head 9. As is generally known, the platen 23 on which a document sheet is placed and set, a carriage 21 that scans a document image along the platen 23, and an optical device that photoelectrically converts an optical image from the carriage 21. It comprises a reading means (for example, a CCD device) 22. In the illustrated example, a document feeder 25 for automatically feeding a document sheet to the platen is provided on the platen 23.

[Configuration of bookbinding device]
Next, the bookbinding apparatus B attached to the image forming apparatus A will be described. The bookbinding apparatus B includes a stacking unit 40 that stacks and arranges printing sheets in a bundle in the casing 30, an adhesive application unit 55 that applies adhesive paste to the sheet bundle from the stacking unit 40, and an adhesive. A cover binding means 60 for binding the cover sheet to the coated sheet bundle is configured.

[Configuration of transport route]
The sheet conveyance path will be described. In the casing 30, a sheet carry-in path 31 having a carry-in port 31 a connected to the paper discharge port 14 of the image forming apparatus A is provided, and from the sheet carry-in path 31 to the intermediate paper carry path 32. Are connected to each other via a path switching flapper 36. A bookbinding processing path 33 is connected to the intermediate paper transport path 32 via the stacking unit 40, and a paper discharge path 38 is connected to the cover transport path 34. The paper discharge path 38 is provided with a paper discharge port 38a for carrying out a sheet to a large-capacity stacking apparatus C described later. Further, a sheet bundle carrying-out path 110 for carrying out the bookbinding-processed sheet is connected to the bookbinding processing path 33, and the sheet bundle carrying-out path 110 conveys the sheet bundle from the bookbinding processing path 33 to the paper discharge path 38. It is configured.

  The bookbinding path 33 is arranged in a direction that cuts through the apparatus in a substantially vertical direction, and the cover transport path 34 is arranged in a direction that crosses the apparatus in a substantially horizontal direction. Accordingly, the sheet from the sheet carry-in path 31 connected to the image forming apparatus A is sent to the stacking unit 40, and the sheets stacked by the stacking unit 40 are sent to the bookbinding processing path 33. On the other hand, the sheet in the sheet carry-in path 31 is sent from the cover transport path 34 to the paper discharge path 38 via the path switching piece 36 (see FIG. 1), and is carried out of the apparatus from the paper discharge port 38a of this path. . The sheet bundle subjected to the bookbinding process from the bookbinding process path 33 is sent from the sheet bundle carry-out path 110 to the paper discharge path 38 and is carried out of the apparatus through the paper discharge port 38a.

[Binding processing path configuration]
The bookbinding processing path 33 and the cover transport path 34 intersect (orthogonal) each other, and a cover binding means 60 described later is disposed at the intersection. The sheet carry-in path 31 configured as described above is connected to the paper discharge port 14 of the image forming apparatus A and receives a print sheet from the image forming apparatus A. In this case, the image forming apparatus A carries out a print sheet (saddle stitching sheet) on which content information is printed and a print sheet (hereinafter referred to as a cover sheet) on which a title used as a cover cover is printed. In this way, the sheet carry-in path 31 is branched into the intermediate sheet conveyance path 32 and the cover sheet conveyance path 34, and the print sheets are distributed and conveyed to the respective paths via the path switching flapper 36.

  On the other hand, an inserter device 26 is connected to the sheet carry-in path 31 so that cover sheets that are not subjected to printing processing by the image forming apparatus A are separated from the paper feed tray 26a one by one and supplied to the sheet carry-in path 31. It is. The inserter device 26 is provided with one or a plurality of stages of paper feed trays 26a. A paper feed means for separating and feeding stacked sheets one by one at the front end of the tray, and a downstream side of the paper feed means. A sheet feeding path 27 is provided, and the sheet feeding path 27 is connected to a sheet carry-in path 31 via a path switching piece 28. Further, the conveyance roller 31b is provided in the sheet carry-in path 31, the conveyance roller 32a is provided in the intermediate paper conveyance path 32, the grip conveyance means (sheet bundle conveyance means; the same applies hereinafter) 47 and the bundle posture deflection described later. A means 64 and a paper discharge roller (paper discharge means) 66 are arranged. Further, a transport roller 34a is disposed in the cover transport path 34, and a paper discharge roller unit 117a, which will be described later, is disposed in the paper discharge path 38, and each is connected to a drive motor.

[Configuration of stacking unit]
A stacking tray 41 (hereinafter referred to as “tray”) disposed in the paper discharge port 32b of the intermediate paper conveyance path 32 stacks and stores sheets from the paper discharge port 32b in a bundle shape as shown in FIG. Is constituted by a tray member arranged in a substantially horizontal posture, and a forward / reverse roller 42a and a carry-in guide 42b are provided above the tray member, and a print sheet from the paper discharge port 32b is placed on the tray 41 by the carry-in guide 42b. The forward / reverse rotation roller 42a forwardly rotates to transfer the print sheet to the front end side of the tray 41, and reversely rotates to a regulating member disposed at the rear end of the tray (the right end in FIG. 1). The rear end of the sheet is abutted against 43. Further, a sheet side aligning means (not shown) is provided on the tray 41, and both side edges of the print sheet stored on the tray are aligned to the reference position. Printing sheet from the intermediate sheet conveying path 32 in the configuration are sequentially piled up bundle in collated on the tray 41.

[Configuration of sheet bundle conveying means]
The bookbinding path 33 is provided with grip conveying means 47 for transferring the sheet from the tray 41 to the adhesive application position E on the downstream side. As shown in FIG. 2, the grip conveying means 47 deflects the sheet bundle accumulated on the tray 41 from a horizontal posture to a vertical posture, and the sheet bundle is adhered along the bookbinding path 33 arranged substantially in the vertical direction. Transfer set to application position E. For this reason, the tray 41 is moved from the stacking position (solid line in FIG. 2) to the transfer position (broken line in FIG. 2), and the sheet bundle is transferred to the grip conveying means 47 prepared at the transfer position.

[Configuration of adhesive application part]
An adhesive application means 55 is disposed at the adhesive application position E in the bookbinding path 33. As shown in FIG. 2, the adhesive application means 55 is composed of a glue container 56 that accommodates a hot-melt adhesive, an application roll 57, and a roll rotation motor MR. The paste container 56 is divided into a liquid adhesive storage chamber (hereinafter referred to as a liquid agent storage chamber) 56a and a solid adhesive storage chamber (hereinafter referred to as a solid agent storage chamber) 56b, and an application roll 57 is rotatable in the liquid agent storage chamber 56a. It has been incorporated. A paste sensor 56S that detects the remaining amount of adhesive is disposed in the liquid agent storage chamber 56a. The illustrated glue sensor 56S also serves as an adhesive temperature sensor, and detects the temperature of the liquefied adhesive in the liquid storage chamber 56a, and at the same time, determines the remaining amount of adhesive by the temperature difference of the part immersed in the adhesive. To detect. The glue container 56 has a heating element (heating means) such as an electric heater embedded therein. The glue sensor 56S and the heating means are connected to a control CPU (not shown) to adjust the temperature of the adhesive in the liquid agent storage chamber 56a to a predetermined melting temperature. The application roll 57 is made of a heat-resistant porous material, and is configured to impregnate the glue and swell the glue layer around the roll.

The glue container 56 configured as described above is reciprocated along the sheet bundle. The glue container 56 is formed in a short length (dimension) with respect to the lower end edge (back cover part at the time of bookbinding) S1 of the sheet bundle, and along the lower end edge S1 of the sheet bundle together with the application roll 57 incorporated therein. Are supported by guide rails 52 of the apparatus frame. The glue container 56 is connected to a timing belt (not shown) attached to the apparatus frame, and a driving motor MS is connected to the timing belt.

[Configuration of cover binding means]
A cover binding means 60 is disposed at the cover binding position F of the bookbinding processing path 33. As shown in FIG. 2, the cover binding means 60 includes a back plate 61, a back folding plate 62, and a folding roll 63. At the cover binding position F, the above-described cover transport path 34 is arranged, and the cover sheet is fed from the image forming apparatus A or the inserter 26. Therefore, the back plate 61 is composed of a plate-like member that backs up the cover sheet, and is disposed in the bookbinding processing path 33 so as to be able to advance and retreat. A (middle paper) sheet bundle is joined in an inverted T shape to the cover sheet supported by the back plate 61. Therefore, the back folding plate 62 is composed of a pair of left and right press members, and is configured to approach and separate from each other by a driving means (not shown) in order to back-fold the back portion of the cover sheet joined in an inverted T shape. Yes. Further, the folding roll 63 is composed of a pair of rollers for clamping and finishing the back-folded sheet bundle.

[Configuration of bundle posture deflection means and cutting means]
At a cutting position G located on the downstream side of the folding roll 63, a bundle posture deflecting means 64 for deflecting the top and bottom direction of the sheet bundle and a cutting means 65 for cutting the periphery of the sheet bundle are arranged. The bundle posture deflecting unit 64 deflects the sheet bundle mounted from the cover binding position E in a predetermined direction (posture) and feeds the sheet bundle to the downstream cutting unit 65 or the storage stacker 67. The cutting means 65 cuts and aligns the periphery of the sheet bundle. Therefore, the bundle posture deflecting unit 64 includes rotary tables 64a and 64b that grip and rotate the sheet bundle sent from the folding roll 63. As shown in FIG. 2, the rotary tables 64a and 64b are provided on a unit frame 64x attached to the apparatus frame so as to be movable up and down. A pair of rotary tables 64 a and 64 b are rotatably supported by the unit frame 64 x with the bookbinding processing path 33 interposed therebetween, and one movable rotary table 64 b is in the sheet bundle thickness direction (perpendicular to the bookbinding processing path 33. Direction). The rotary tables 64a and 64b are provided with turning motors Mt1 and Mt2 (not shown) so as to deflect the posture of the sheet bundle in the bookbinding processing path 33. The movable rotary table 64b is equipped with a grip motor Mg (not shown) that moves in the left-right direction in FIG.

  Accordingly, the sheet bundle guided into the bookbinding processing path 33 is gripped by the pair of left and right rotary tables 64a and 64b, and the orientation direction of the sheet bundle is deflected by the turning motors Mt1 and Mt2 (not shown). For example, the sheet bundle having the back portion carried downward is turned 180 degrees and the small edge portion is sent downward to a downstream discharge roller (paper discharge means) 66. Further, it is possible to perform a trimming cut in which the sheet bundle is sequentially rotated by 90 degrees, and the top portion, the ground portion, and the fore edge portion are deflected downward at the cutting position G on the downstream side to cut the three peripheral directions of the sheet bundle. The movable rotary table 64b is provided with a grip sensor (not shown) to detect that the sheet bundle is securely gripped between the left and right rotary tables 64a and 64b, and the post-detection rotary table 64a. , 64b is driven to turn. The unit frame 64x can be moved up and down along the bookbinding path 33 by a lifting motor. This constitutes a jog mechanism that offsets a predetermined amount of the sheet bundle transferred to the sheet discharge roller (sheet discharge means) 66 as will be described later, and at the same time the sheet bundle is conveyed to the cutting position G when cutting the periphery of the sheet bundle. This is because the cutting width at the cutting position G is set by the set amount.

[Composition of cutting means]
A cutting means 65 is disposed downstream of the bundle posture deflecting means 64. As shown in FIG. 2, the cutting means 65 includes a cutting edge press member 65b for pressing and supporting the cutting edge of the sheet bundle on the blade receiving member 65a, and a cutting blade unit 65c. The cutting edge press member 65b is arranged at a position facing the blade receiving member 65a arranged in the bookbinding processing path 33, and is constituted by a pressing member that moves in a direction orthogonal to the sheet bundle by a driving means (not shown). The cutting blade unit 65c is composed of a flat blade-shaped cutting blade and a cutter motor MC that drives the cutting blade. By the cutting means 65 having such a configuration, a predetermined amount of the peripheral edge except the back portion of the sheet bundle that has been bound into a booklet is cut and aligned.

[Configuration of waste storage box]
Below the cutting position G, a waste storage box 68 is provided in parallel with the storage stacker 67, and stores a piece of paper cut by the cutting blade 65x. Therefore, a sweeper means 69 is provided immediately below the cutting position G. The sweeper 69 is swung in the left-right direction in FIG. 2 by a drive motor (not shown), and is positioned immediately below the cutting position G when cutting a sheet bundle. Then, the cut pieces are guided to the waste storage box 68, and after cutting, the sheet bundle is retracted from the cutting position G so that the sheet bundle can be stored in the storage stacker 67. The waste storage box 68 is provided with a full detection sensor (full detection sensor) 68Sf and a near full detection sensor 68Sn for detecting the storage amount of the cut piece of paper stored therein. The near-full detection sensor 68Sn is arranged so as to detect a piece of paper corresponding to one time for cutting the peripheral edge of the sheet bundle so as not to become full during cutting of the sheet bundle.

  In the bookbinding apparatus B described above, the sheet bundle subjected to the bookbinding process from the bookbinding process path 33 (hereinafter referred to as “bookbinding sheet bundle”) is carried out from the sheet bundle carry-out path 110 to the paper discharge path 38. The sheet bundle carry-out path 110 is configured to switch-back convey the bookbinding sheet bundle from the bookbinding processing path 33 and convey it to the paper discharge path 38. The sheet bundle carry-out path 110 includes a guide 110a that conveys the bookbinding sheet bundle from the bookbinding process path 33, a conveyance claw member 112 that sends out the sheet bundle along the guide, and a belt that moves the claw member along the guide 110a. 111. A roller unit 117a is disposed at the downstream end of the guide 110a (within the paper discharge path 38 in FIG. 2). Although the roller unit 117a will be described later, the posture of the bookbinding sheet bundle sent out by the conveying claw member 112 along the guide 110a is deflected and guided to the paper discharge port 38a.

  The above-described apparatus shown in FIG. 2 has the above-described bundle posture deflecting means 64 disposed in the bookbinding processing path 33, and the bookbinding sheet bundle is sent from a paper discharge roller (paper discharge means) 66 with the back binding end surface Sx facing upward. Then, the bookbinding sheet bundle is received by the conveyance claw member 112 and the sheet bundle is conveyed along the guide 110a with the back binding end surface Sx facing the downstream side in the conveyance direction.

[Different Embodiments of Sheet Bundle Unloading Route]
FIG. 3 shows a configuration of the sheet bundle carrying-out path 115 different from that in FIG. 2, and the other configurations are the same as those in the apparatus in FIG. In the apparatus of FIG. 3, the sheet bundle carrying-out path 115 is arranged from the bookbinding processing path 33 toward the paper discharge port 38 a of the paper discharge path 38. A bundle conveying means (belt in the figure is shown) 114 is provided in the sheet bundle carrying-out path 115. In the thus configured sheet bundle carrying-out path 115, a roller unit 117b is arranged at the inlet end (lower side in FIG. 3), and a roller unit 117a is arranged at the outlet end (paper discharging path 38 in FIG. 3) as described above. Has been. The roller units 117a and 117b have the same configuration, and details thereof will be described later.

  In the apparatus of FIG. 3, a second storage stacker 67 is provided on the downstream side of the roller unit 117b. The roller unit 117b can select whether the bookbinding sheet bundle from the bookbinding processing path 33 is carried out to the sheet bundle carrying-out path 115 or is carried out to the second storage stacker 67 without being carried out to this path. ing. In other words, a paper discharge roller unit 117, which will be described later, selects a path switching for selecting whether a bookbinding sheet bundle from the bookbinding processing path 33 is carried out to the second storage stacker 67 or to be stored in a lifting tray 85 of a large capacity stacking apparatus C described later. Means.

  The roller unit 117b that constitutes the path switching unit is configured such that the second storage stacker 67 or the sheet bundle corresponds to the bundle thickness of the sheet bundle that has been bound in the bookbinding process path 33 or the number of sheets constituting the sheet bundle. A discriminating means (not shown) for discriminating whether the sheet bundle is carried out to the carry-out path 115 is provided. For example, a sensor that detects the thickness of the sheet bundle stacked on the stacking tray 41 described above is provided, and a detection signal from this sensor, or detection from a sensor (discharge sensor) that detects the sheet discharged to the tray. When the thickness or number of sheet bundles accumulated by the signal is greater than or equal to a predetermined value, the sheet bundle is stored in the second storage stacker 67.

[Configuration of paper discharge roller unit]
Next, the paper discharge roller unit 117 will be described with reference to FIGS. 2 and 3, the roller unit 117a arranged in the paper discharge path 38 and the roller unit 117b arranged in the bookbinding path 33 in the apparatus shown in FIG. 3 have the same structure as follows. Has been. As shown in FIG. 4A, rollers 119a and 119b that nip a pair of sheets or a sheet bundle are supported by a unit frame 117f. It is supported by an apparatus frame (not shown; the drive shaft 118 is supported) so as to be rotatable about the drive shaft 118. A fan-shaped gear 120 is loosely fitted on the drive shaft 118, and the fan-shaped gear 120 is fixed to the unit frame 117f. The sector gear 120 is connected to the attitude deflection motor M7 by a transmission gear 116. The attitude deflection motor M7 and the transmission gear 116 are provided on the apparatus frame side (not shown).

  Accordingly, by rotating the attitude deflection motor M7 forward and backward, the unit frame 117f rotates about the drive shaft 118, and the driven roller 119b rolls on the peripheral surface of the drive roller 119a from the state shown in FIG. b) Displace to the state. Then, the sheet bundle (or single sheet) nipped between the rollers deflects its posture. The unit frame 117f is equipped with a nip position adjusting means (not shown). This nip position adjusting means is configured such that the position can be changed when the roller pair 119 nips a single sheet and when the sheet bundle nips. For example, a driven roller 119b is supported by a bearing (long groove or the like) on the unit frame 117f so that the position of the driven roller 119b is movable, and is urged toward the driving roller 119a by an urging spring. Then, the driven roller 119b is pressed against the driving roller 119a. As a result, the nip position can be adjusted.

  An operation for deflecting the posture of the sheet bundle by the paper discharge roller unit 117 will be described with reference to FIG. This figure shows the operation of the paper discharge roller unit 117a disposed in the paper discharge path 38, and the bookbinding sheet bundle sent from the bundle conveying means 114 is nipped between the rollers 119a and 119b (FIG. 5A). Therefore, when the driving roller 119a supported by the driving shaft 118 is rotated and at the same time the attitude deflection motor M7 is rotated a predetermined time, the sheet bundle enters the paper discharge path 38 while being bent and bent in the state shown in FIG. Further, when the trailing edge of the sheet is separated from the bundle conveying means 114, the trailing edge of the sheet is fed to the discharge port 38a side while being guided by the deflection guide 113 as shown in FIG. When the trailing edge of the sheet moves away from the deflection guide 113, the sheet bundle is deflected in the horizontal posture in the state shown in FIG.

  Further, the roller unit 117b arranged in the bookbinding processing path 33 shown in FIG. 3 receives the sheet bundle from the bookbinding processing path 33 in the state of the solid line in FIG. In this state, when the driving roller 119a is rotated in the paper discharge direction, the sheet bundle is carried out to the second storage stacker 67. Separately, the posture deflection motor M7 is rotated by a predetermined amount with the sheet bundle nipped between the rollers 119a and 119b (counterclockwise in the case of FIG. 3). Then, the posture of the sheet bundle is deflected to the state of the chain line in FIG. Thereafter, the driving roller 119a is rotated to carry out the sheet bundle toward the bundle conveying means 114 on the downstream side.

[Configuration of large capacity stack device]
Next, the large capacity stack apparatus C will be described. The illustrated large-capacity stacking apparatus C includes a sheet inflow path 81, a lifting tray 85, a sheet transfer unit 88, and a sheet leading end regulating unit 83 arranged in an appropriately shaped housing 80 (see FIG. 1). Then, the sheet is sent from the sheet inflow path 81 to the outlet 84, and the sheet is conveyed to the tray front side by the sheet conveying means 88. The sheet abuts against the sheet leading edge regulating means 83 and is separated from the sheet conveying means 88 to move up and down. The tray 85 is stored by being dropped.

[Sheet carry-in route]
The sheet inflow path 81 includes a conveyance guide having a sheet inflow port 90 and an outflow port 84, and the sheet inflow path 81 is provided with a paper discharge unit 82 for conveying the sheet. As shown in FIG. 6, the paper discharge unit 82 includes a driving roller 82 a and a driven roller 82 b, and carries the sheet from the inflow port 90 to the outflow port 84. Reference numeral Sa denotes a paper discharge sensor that detects the leading edge and the trailing edge of the sheet.

[Sheet ejection means]
A sheet transfer means 88 is provided above the downstream side of the outlet 84. The sheet conveying means 88 is constituted by a grip belt or a vacuum belt for nipping the sheet, and conveys the sheet from the outlet 84 to the front end side of the tray by nip or suction. This is because when the sheet from the outlet 84 is directly carried out onto the tray, it comes into contact with the sheet on the tray and causes a discharge failure (jam), and the discharge speed is limited due to the frictional resistance of the sheet. Therefore, this sheet transfer means 88 transfers the sheet from the outlet 84 to the front end of the tray at the same speed as the discharge speed of the paper discharge means 82, and the sheets are dropped and accumulated while the entire sheet is moved onto the tray. is there. For this reason, the sheet transfer means 88 is constituted by a vacuum belt that sucks the sheet or a grip belt that nips the leading end of the sheet.

  The structure of the latter grip belt will be described. A pair of pulleys 87a and 87b are provided on the apparatus frame above an elevating tray 85 described later, and a belt member 89 is stretched between the pulleys. The belt member 89 is provided with a gripper member 92. The gripper member 92 has a nip piece 92a that engages with the front end of the sheet so as to grasp the front end of the sheet from the outlet 84 and guide it to a predetermined unloading position Ep (see FIG. 2). The belt member 89 is integrally provided so as to move at the same speed. A driving motor M1 is connected to the pulley 87a of the belt member 89 so as to rotate clockwise in FIG. Accordingly, when the belt member 89 is stopped with the gripper member 92 facing the outlet 84 and the sheet is unloaded from the outlet 84, the leading end of the sheet enters between the nip piece 92a and the belt surface, and the elastic force of the nip piece 92a. As a result, the leading edge of the sheet is gripped.

[Sheet tip regulating means]
A sheet leading edge regulating means 83 is provided at the carry-out position of the sheet conveying means 88. The restricting means 83 is arranged above the tray means along with the belt member 89. A stopper piece 86 is provided for abutting against the leading edge of the sheet conveyed by the belt member 89 and separating the sheet from the sheet conveying means 88. A plurality of the stopper pieces 86 are arranged in the sheet width direction (conveyance orthogonal direction) and are configured to move back and forth in the conveyance direction according to the sheet size as shown in FIG. That is, the sheet leading edge regulating means 83 (hereinafter referred to as “stopper unit”) is supported by the apparatus frame 96 on a guide rail (not shown) so as to be movable back and forth in the conveyance direction (left and right direction in FIG. 2). The stopper unit 83 is connected to a position adjustment belt (endless belt or the like) stretched in the left-right direction in FIG. 6, and this belt is moved by the position adjustment motor M2 (not shown) in the left-right direction in FIG. It has become.

[Tray lifting means]
As shown in FIG. 7, the tray lifting / lowering means 98 for mounting the lifting / lowering tray 85 is composed of fork-like lifting arms 98a and 98b (fork members; the same applies hereinafter) mounted on the apparatus frame 96 so as to be movable up and down. . The elevating arms 98a and 98b are guided in the stacking direction (up and down direction in FIG. 7) along the guide rails 100a and 100b provided on the apparatus frame 96, and are supported so as to be movable up and down. The elevating arms 98 a and 98 b are suspended by a pulling member 102 such as a wire or a belt that is stretched over a suspension pulley 101 fixed to the apparatus frame 96, and the illustrated pulling wire is connected to the take-up pulley 103. The take-up pulley 103 is connected to a lifting motor M3. Therefore, the lifting arms 98a and 98b are supported by the guide rails 100a and 100b of the apparatus frame 96, and are moved up and down by the lifting motor M3. The elevating tray 85 is mounted on the elevating arms 98a and 98b and is moved up and down in accordance with the loading amount below the outlet 84.

  The elevating arms 98a and 98b are provided with a rear end regulating member for regulating the rear end of the sheet, and the rear end of the sheet from the outlet 84 is abutted on the elevating tray 85 mounted on the elevating arms 98a and 98b. Then, they are stacked one after another. The elevating arms 98a and 98b support the elevating tray 85 so that the elevating tray 85 can be moved up and down below the outlet 84, and can be raised and lowered between the sheet storage position and a tray attaching / detaching position set further below. Yes. The tray attaching / detaching position is not limited to the lowermost position of the tray lifting / lowering means, but is set to an appropriate position for taking out the sheet from the tray means to the outside of the apparatus below the sheet storing position. The tray is carried out to the outside of the apparatus.

[Tray lifting control]
The tray elevating means 98 is provided with an upper limit position sensor Sp2 for detecting an upper limit position, a maximum stacking position sensor Sp3 for detecting a maximum stacking position, and a lower limit position sensor Sp4 for detecting a lower limit position. The control means 104 of the lifting motor M3, which will be described later, moves the lifting arms 98a and 98b up and down by rotationally driving the lifting motor M3 based on the paper level sensor Sp1 and the detection signals of the sensors.

[Configuration of matching means]
As described above, the sheet from the outflow port 84 is conveyed to the front end side of the tray by the sheet transfer unit 88, is peeled off from the sheet transfer unit 88 by the sheet front end control unit 83, and falls on the lift tray 85. In this process, the sheet is corrected in the conveying orthogonal direction by the aligning means (aligning member) 93 and stored in alignment on the tray. For this reason, alignment means 93 including alignment members 93a and 93b are provided on the side edges (around FIG. 6) of the sheet conveyed by the sheet conveying means 88. As shown in FIG. 8, the rear side alignment member 93b for regulating the sheet side edge on the rear side of the apparatus and the front side alignment member 93a for regulating the sheet side edge on the front side of the apparatus are arranged from above and below the lifting tray 85 as shown in FIG. It is arranged to hang down. The alignment members 93a and 93b (hereinafter collectively referred to as “alignment member 93”) are supported by a shaft member 93c and moved in the left-right direction in FIG.

  The illustrated alignment member 93 is fitted and supported by the shaft member 93c so as to be movable between an engagement position X (see FIG. 8) for engaging the sheet side edge and a standby position Y away from the sheet side edge. The alignment member 93 is connected to a pair of left and right shift levers 94a, 94b connected to the width adjusting motor M4, and both levers are engaged with a pinion M4p of the width adjusting motor M4. Accordingly, the alignment member 93 moves in accordance with the width size of the sheet by the rotation of the pinion M4p. That is, the front side / rear side alignment members 93a and 93b are moved to a position suitable for the sheet width size by the rotation of the width adjusting motor M4, and the alignment member 93 is moved from the sheet side edge to the standby position Y by the width adjusting motor M4. Moving. The alignment member 93 is provided with a leading end hanging piece 93a 'at a position where it does not engage with the spine end face Sx of the bookbinding sheet bundle.

  Therefore, the present invention is configured such that the alignment member 93 described above is (1) width-aligned and aligned at a side edge position different from the spine binding end surface of the sheet bundle carried out from the bookbinding apparatus B, or (2) When the sheet bundle is carried out from the bookbinding apparatus B onto the lift tray 85, the sheet bundle is configured to stand by at a standby position retracted from the sheet bundle side edge.

  In the case of the above (1), as shown in FIG. 6, the tip hanging piece 93 a ′ engaged with the sheet side edge of the alignment member 93 is positioned at a position different from the spine end face Sx of the sheet bundle stacked on the lifting tray 85 ( This figure is arranged at an offset by a distance α).

  In the case of (2) above, as shown in FIG. 8, the aligning member 93 movable between the engagement position X and the standby position Y is used, and the sheet bundle from the bookbinding path 33 is transferred to the sheet carry-out path 110 (FIG. 2). Configuration), 115 (configuration of FIG. 3), when being carried out to the lifting tray 85, it is held at the standby position (non-operating state). That is, control is performed so that the alignment means 93 is not operated.

[Configuration of post-processing equipment]
The large-capacity stack apparatus C is provided with a post-processing apparatus D on the downstream side thereof, and is provided with a bypass path 81p for carrying out a sheet from the inlet 81 to the outside of the apparatus. The post-processing device D is connected to the bypass path 81p. The post-processing apparatus D receives the print sheet from the image forming apparatus A via the bypass path 81p, performs stapling processing, punching processing, and stamping processing on the printing sheet, and carries them out to the paper discharge tray 37. Further, the sheet from the image forming apparatus A that is not subjected to such post-processing is stored in the paper discharge tray 37.

1 is an explanatory diagram of an overall configuration of an image forming system according to the present invention. FIG. 2 is an explanatory diagram of a main part of a bookbinding apparatus in the system of FIG. 1. FIG. 3 is an explanatory diagram showing a form of a bookbinding apparatus (second example) different from the bookbinding apparatus of FIG. 2. 2 and 3 show the configuration of the sheet bundle deflection unit (means), in which (a) shows the sheet bundle carry-in state, and (b) shows the deflection state in which the sheet bundle is swung. FIG. 5 is an explanatory diagram of an operation state of the sheet bundle deflection unit of FIG. 4, and (a), (b), (c), and (d) show an operation state for deflecting the sheet bundle step by step. FIG. 2 is an explanatory diagram of a main part of a large-capacity stack apparatus in the system of FIG. 1. Explanatory drawing which shows the raising / lowering mechanism of the raising / lowering tray means in the apparatus of FIG. Explanatory drawing of the operation state of the alignment means in the apparatus of FIG.

Explanation of symbols

A Image forming apparatus B Bookbinding apparatus C Large-capacity stacking apparatus 26 Inserter apparatus 31 Sheet carry-in path 32 Middle paper transport path 32a Transport roller 32b Paper discharge port 33 Bookbinding process path 34 Cover paper transport path 36 Path switching flapper 37 Paper discharge tray 38 Paper discharge Path 38a Paper exit (bookbinding device)
40 Stacking unit 55 Adhesive application means 56 Glue container 57 Application roll 60 Cover binding means 61 Back plate 62 Back fold plate 63 Fold roll 64 Bunch attitude deflection means (sheet bundle deflection means)
64a Rotary table 64b Rotary table (movable side)
64x unit frame 65 cutting means 65a blade receiving member 66 paper discharge roller (paper discharge means)
67 Storage stacker 68 Waste storage box 69 Sweep means 80 Housing 81 Sheet inflow path 83 Sheet front end regulating means 84 Outlet 85 Lift tray 86 Stopper piece 88 Sheet conveying means 90 Inlet 93 Alignment means 93a Alignment member (front side)
93a 'Tip hanging piece 93b Alignment member (rear side)
93c Shaft member 98 Tray elevating means 98a Elevating arm 98b Elevating arm 110 Sheet bundle unloading path 110a Guide 111 Belt 112 Conveying claw member 113 Deflection guide 114 Bundle conveying means 115 Sheet bundle unloading path (Modification)
116 Transmission gear 117 Paper discharge roller unit 117a Roller unit 117b Roller unit 117f Unit frame 118 Drive shaft 119a Driven roller 119b Movable roller 120 Fan-shaped gear Sx Back binding end surface

Claims (8)

Arranged in the order of image forming device, bookbinding device, stack device in the sheet conveying direction,
The image forming apparatus includes image forming means for sequentially forming images on a sheet,
The bookbinding apparatus includes an adhesive application unit that applies the adhesive to the spine end face by aligning the sheets from the image forming apparatus in a bundle.
The stacking device includes elevating tray means for elevating and lowering sheets according to the stacking amount.
A sheet carry-in path for selectively guiding a sheet from the image forming apparatus to the bookbinding apparatus or the stack apparatus;
An image forming system provided with each,
The sheet carry-in path is arranged in the bookbinding apparatus so as to guide the sheet from the image forming apparatus to the adhesive application means or the lifting tray means,
The bookbinding apparatus is provided with a sheet bundle carry-out path for guiding the bundle of bound sheets from the adhesive application means to the lifting tray means,
The stacking device is provided with aligning means for aligning the side edges of the sheets or sheet bundles accommodated in the elevating tray means,
This alignment means
(1) The sheet bundle conveyed from the bookbinding apparatus is configured to be aligned at a side edge position different from the spine end face of the sheet bundle, or (2) the sheet bundle from the bookbinding apparatus is placed on the lifting tray means. An image forming system configured to wait at a standby position retracted from a side edge of a sheet bundle when being carried out. The aligning means is disposed between a sheet discharge port through which the sheet or sheet bundle is carried out and the elevating tray means,
The aligning means includes an aligning member that regulates and widens the side edge of the sheet or sheet bundle carried out from the discharge port,
The image forming system according to claim 1, wherein the aligning member is disposed at a position that regulates a side edge different from the spine end face of the sheet bundle. The alignment means includes
An alignment member for regulating the position of the side edge of the sheet or sheet bundle;
Shift means for moving the alignment member between an alignment position in contact with the sheet side edge and a separated standby position;
Consisting of
2. The image forming system according to claim 1, wherein when the sheet bundle is unloaded from the bookbinding apparatus to the elevating tray unit, the shift unit waits the alignment member at a standby position. The sheet carry-in path is configured to convey a sheet from the image forming apparatus to the stack apparatus across the bookbinding apparatus between a carry-in port and a paper discharge port arranged in the bookbinding apparatus,
The adhesive application means is disposed in a bookbinding path branched from the sheet carry-in path,
The sheet bundle carrying-out path is configured to carry out the bookbinding-processed sheet bundle from the bookbinding processing path to the paper discharge port,
The bookbinding path or the sheet bundle carry-out path is provided with sheet bundle deflecting means for deflecting the attitude of the bookbinding sheet bundle,
4. The image forming apparatus according to claim 1, wherein the sheet bundle deflecting unit conveys the sheet bundle to the sheet bundle unloading path in a posture in which a spine binding end surface of the sheet bundle is positioned on a leading end side in a conveyance direction. system. The bookbinding apparatus is provided with bookbinding stack means for storing a sheet bundle that has been subjected to bookbinding processing from the bookbinding path,
5. The image forming system according to claim 4, wherein a path switching means for selectively carrying out a sheet bundle to the bookbinding stack means and the sheet bundle carrying-out path is arranged in the bookbinding path. The path switching means includes a discrimination means for unloading the sheet bundle to the bookbinding stack means or the sheet bundle unloading path in accordance with the bundle thickness of the sheet bundle that has been bound by the bookbinding path or the number of sheets constituting the sheet bundle. The image forming system according to claim 5, further comprising: The determination unit is configured to prohibit the sheet bundle from being carried out to the sheet bundle carrying-out path when the bundle thickness of the sheet bundle is a predetermined thickness or more or when the number of sheets constituting the sheet bundle is a predetermined number or more. The image forming system according to claim 6, wherein: A post-processing device is connected to the stack device on the downstream side in the sheet conveying direction,
The stack device is provided with a bypass path for transferring a sheet from the paper discharge port to the post-processing device,
The post-processing apparatus includes post-processing means for performing post-processing on the sheet from the bypass path,
8. The post-processing means comprises a stapling means for binding sheets from the bypass path, a punch means for punching processing, or a stamp means for stamping processing. The image forming system according to any one of the above.

Images