JP2009190185A - Bookbinding device, and image forming system provided therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bookbinding device capable of attaching automatically as an addition a reinforcing sheet onto a backbinding face, when applying an adhesive onto an inner biding sheet and when binding a book by binding a cover sheet. <P>SOLUTION: The cover sheet is supplied to a treating stage for the bookbinding, and is positioned therein, the reinforcing sheet is supplied on the cover sheet, the inner binding sheet is joined to the cover sheet, and the cover sheet is folded back into a ridged shape. The bookbinding device adopts therein either of a method of addition-bonding the inner sheet under the condition where the reinforcing sheet is mounted on the cover sheet, or a method of bonding the reinforcing sheet on the cover sheet, onto the inner sheet applied with the adhesive, and of binding the reinforcing sheet onto the cover sheet and of binding it onto the cover sheet, after the adhesive is applied again to the reinforcing sheet. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bookbinding apparatus that stacks and stacks sheets conveyed from an image forming apparatus or the like in a bundle and binds the saddle stitched sheet bundle to a cover sheet and binds a reinforcing tape to the back binding surface during the bookbinding. The present invention relates to an improvement of a mechanism to be included.

  In general, this type of bookbinding apparatus stacks sheets conveyed from an image forming apparatus in a bundle on a stacking tray and applies an adhesive to the back of the sheet bundle. At the same time, the cover sheet is fed from the inserter unit (paper feeding device) arranged on the upstream side of the image forming apparatus or the stacking tray to the processing stage arranged on the downstream side of the adhesive application position E. A case binding apparatus is known in which a sheet bundle coated with an adhesive at the cover binding position is joined to the center (back binding surface) of the cover sheet in an inverted T shape, and then the cover sheet is folded back and finished. It has been.

  Conventionally, such a bookbinding apparatus is disclosed in Patent Document 1, for example. In this document, a sheet is continuously provided at a paper discharge port of an image forming apparatus, and sheets on which an image is formed are stacked on a stacking tray. And after apply | coating an adhesive agent to the back part of the sheet | seat bundle aligned in this bundle shape, it transfers to the downstream cover binding position. Therefore, a cover sheet supply path is continuously provided at the cover sheet binding position, and a cover sheet is fed and set from the cover sheet supply path to the cover sheet binding position.

  In such a bookbinding apparatus, when a saddle stitch sheet (bundle) is bound and bound by a cover sheet, a reinforcing sheet is interposed between the back binding end surface of the saddle stitch sheet and the back binding surface of the cover sheet. Matching is known as a bookbinding method. For example, Patent Document 1 proposes a bookbinding method in which a thin metal plate having an opening is interposed between a saddle stitch sheet bundle and a cover sheet and the three members are bound together with an adhesive. The publication discloses a method of binding by attaching a reinforcing piece made of a thin metal plate to the back binding surface of the cover sheet with an adhesive and pressing the saddle stitching sheet coated with the adhesive on the reinforcing plate. Yes.

Similarly, Patent Document 2 and Patent Document 3 disclose a method of attaching a plurality of reinforcing pieces to the back binding surface of a cover sheet. In the methods of Document 2 and Document 3, an adhesive adhesive layer is provided on the back surface of the reinforcing piece, and the surface is covered with separate paper. Then, separate paper is peeled off at the time of bookbinding, a reinforcing piece is attached to the back binding surface of the cover sheet, and then the saddle stitching sheet coated with an adhesive is bound.
Japanese Patent Laying-Open No. 2007-76118 (FIG. 1) Japanese Patent No. 3836206 Japanese Utility Model Publication No.59-13090 Japanese Utility Model Publication No. 1-1492

  As described above, when a saddle stitch sheet is bound and bound on a cover sheet, it is widely known that a reinforcing piece is interposed in a back binding portion. In order to prevent the spine portion from breaking when the booklet sheet after bookbinding is opened, a reinforcing piece such as metal is attached to the spine portion.

  However, interposing a reinforcing piece in the spine portion has a problem that the mechanism is complicated in an automatic bookbinding apparatus that automatically executes bookbinding processing. In other words, in the automatic bookbinding apparatus in which the saddle stitching sheet and the cover sheet are fed to the processing stage for bookbinding and binding as in the above-mentioned Patent Document 1 and are bound with the adhesive attached to the back of the saddle stitching sheet, the automatic binding device is positioned at the correct position of the backbinding portion. Inserting the reinforcing piece complicates the supply mechanism, and at the same time, the bundle thickness varies from time to time, making it difficult to attach the reinforcing piece to the exact position of the spine.

  Therefore, the present inventor has come up with the following idea in order to solve the above-mentioned problems. The first idea is to supply the reinforcing piece to the cover sheet which is supplied to the processing stage and is positioned and set in consideration of the bundle thickness of the sheet bundle, and thereby the reinforcing piece is accurately positioned with a simple structure. It becomes possible to insert. The second idea is to apply the adhesive after applying the reinforcing sheet to the back end face when applying the adhesive to the saddle stitching sheet, so that the reinforcing piece can be accurately positioned with a simple structure. It becomes possible to insert.

A main object of the present invention is to provide a bookbinding apparatus capable of automatically attaching a reinforcing sheet to a back binding surface when an adhesive is applied to a saddle stitching sheet and case binding is bound with a cover sheet. Yes.
Another object of the present invention is to provide a bookbinding apparatus that has a simple structure and can be attached at an accurate position when a reinforcing sheet is interposed on the back binding surface.

  In order to achieve the above object, the present invention supplies a cover sheet to a processing stage for bookbinding processing and positions it, then supplies a reinforcing sheet on the cover sheet, and joins the saddle stitching sheet and the cover sheet, The cover sheet is back-folded. In this case, the saddle stitching sheet is attached with the reinforcing sheet placed and set on the cover sheet, or the cover sheet and the upper reinforcing sheet are adhered to the saddle stitching sheet coated with an adhesive, and the reinforcing sheet is attached. After applying the adhesive again to the cover sheet, it is bound to the cover sheet, or either method is adopted.

  The present invention also provides an adhesive application means for applying an adhesive to the saddle stitching sheet upstream of the processing stage for bookbinding, and a reinforcing sheet is adhered to the back binding end surface of the saddle stitching sheet at this adhesive application position. In this state, the adhesive is applied and then the cover sheet is bound. The specific configuration will be described below.

  A bookbinding apparatus comprising a processing stage (F) for binding a saddle-stitched sheet aligned in a bundle with a cover sheet, which is disposed upstream of the processing stage (F), and is a back end surface of the saddle-stitched sheet An adhesive application means (55) for applying an adhesive to a cover sheet; a cover sheet feeding means (34a) for feeding a cover sheet to the processing stage; and a reinforcing sheet on the back binding surface of the cover sheet on the processing stage. Reinforcing material supply means (80) for feeding, cover binding means (60) disposed on the processing stage and for folding back a cover sheet on the saddle stitching sheet, the cover sheet feeding means, and the reinforcing material supply And a control means (75) for controlling the cover binding means and the cover binding means, the control means (1) supplying a cover sheet to the processing stage, and (2) on the cover sheet on the processing stage. Supplement Supplying sheets (3) above the reinforcing sheet is interposed after joining the binding sheets and cover sheet in said, to folded-back forming the cover sheet.

  When the reinforcing sheet is interposed between the saddle stitching sheet and the cover sheet, the control means supplies the reinforcing sheet to the back binding surface of the cover sheet and superposes the reinforcing sheet, and superimposes the reinforcing sheets. Further, the saddle stitching sheet applied with the adhesive by the adhesive application means (55) is joined to the back binding surface of the cover sheet.

  When the reinforcing sheet is interposed between the saddle stitching sheet and the cover sheet, the control means supplies the reinforcing sheet to the back binding surface of the cover sheet, sets the overlap sheet, and reinforces the cover sheet. After the sheet is attached to the saddle stitch sheet to which the adhesive is applied, the adhesive is again applied to the reinforcing sheet and the saddle stitch sheet by the adhesive application means (55).

  The reinforcing sheet is made of a belt-like substrate (Sx) such as a porous cloth, a synthetic resin, or a piece of paper.

  The reinforcing material supply means includes a reinforcing material cartridge (81) for storing the reinforcing sheet in a roll shape, and a transfer means (85) for feeding the reinforcing sheet from the reinforcing material cartridge to a predetermined position of the cover sheet on the processing stage. ).

  An adhesive application means (55) disposed at an adhesive application position E on the upstream side of the processing stage and applying an adhesive to the back end face of the saddle stitching sheet; and a back binding of the saddle stitching sheet at the adhesive application position E A reinforcing material supply means (80) for feeding a reinforcing sheet to the surface; a cover sheet feeding means (34a) for feeding a cover sheet to the processing stage; and a cover sheet disposed on the saddle stitching sheet, disposed on the processing stage. A cover binding means (60) for folding the back of the sheet, the adhesive application means (55), the cover sheet feeding means (34a), the reinforcing material supply means (80), and the cover binding means are controlled. Control means (75), wherein the control means feeds the reinforcing sheet to the back binding surface of the saddle stitching sheet at the adhesive application position, and then applies the adhesive to the reinforcing sheet and the saddle stitching sheet. Means (55 In an adhesive is applied, the saddle stitching sheet and a reinforcing sheet coated with the adhesive forming folded back and bonded to the cover sheet.

  The adhesive application means includes an adhesive container (56) that contains a hot-melt adhesive, and a guide rail (52) that reciprocally supports the adhesive container along a saddle stitch sheet at the adhesive application position. ) And drive means (MS) for reciprocating the adhesive container along the guide means, and the reinforcing material supply means (80) includes a reinforcing material cartridge (81) for storing the reinforcing sheet in a roll shape. ) And transfer means (85) for feeding a reinforcing sheet from the reinforcing material cartridge to a predetermined position of the cover sheet on the processing stage. The transfer means is the drive means arranged on the guide rail. It is configured to reciprocate along the saddle stitching sheet.

  An image forming system according to the present invention includes an image forming apparatus having an image forming means for forming an image on a sheet, a stacking means (40) for stacking and stacking sheets from the image forming apparatus, and aligning by the stacking means. The bookbinding apparatus is provided with a bookbinding apparatus provided with a processing stage (F) for binding the saddle stitched sheets with a cover sheet, and the bookbinding apparatus has the above-described configuration.

  In the present invention, when the cover sheet and the saddle stitch sheet are bound together in the processing stage, the reinforcing sheet is fed and set on the cover sheet positioned and set on the stage, or at the adhesive application position on the upstream side of the stage. Since the reinforcing sheet is fed and set to the saddle stitched sheet that has been positioned and set, the three effects of the saddle stitching sheet, the reinforcing sheet, and the cover sheet are bound together on the processing stage.

  Since the booklet-like sheet after the bookbinding process has a reinforcing sheet interposed in the spine portion thereof, it does not fold into the spine when opening the cover, and wrinkles or the like do not occur. Further, the reinforcing sheet is attached to the cover sheet or saddle stitch sheet set in consideration of the bundle thickness and the like after the positioning. For this reason, the reinforcing sheet is rarely misaligned from the spine and bound.

  Further, according to the present invention, a reinforcing sheet is placed and set on a cover sheet set on the processing stage, and the reinforcing sheet is adhered with an adhesive applied to the back binding end surface of the saddle stitching sheet. And an adhesive agent is apply | coated to both surfaces of a reinforcement sheet by re-applying an adhesive agent from this reinforcement sheet. Therefore, the entire surface of the reinforcing sheet is bonded with the adhesive interposed between the saddle stitching sheet and the cover sheet. Therefore, robust bookbinding is possible.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is an explanatory diagram of the overall configuration of a bookbinding apparatus according to the present invention and an image forming system using the same, and FIG. 2 is a detailed explanatory diagram of the bookbinding apparatus. FIG. 5 is an enlarged explanatory view of the main part of FIG. 2 and shows a cover sheet feeding path. FIG. 6 is an explanatory diagram of the cover sheet conveyance state.

  As shown in FIG. 1, an image forming system according to the present invention forms an image forming apparatus A that sequentially forms images on sheets, and sheets formed with images connected to a paper discharge port 14 of the image forming apparatus A in a bundle. The bookbinding apparatus B includes a bookbinding apparatus B that cuts the bookbinding sheet bundle after aligning and binding the booklet. The apparatus shown in FIG. 1 further includes a post-processing apparatus C on the downstream side of the bookbinding apparatus B. The detailed configuration of each device will be described later.

[Configuration of Image Forming Apparatus]
As the image forming apparatus A, as shown in FIG. 1, 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 with reference to FIG. 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 conveyance path of each sheet will be described. In the casing 30, a carry-in path 31 having a carry-in entrance 31 a continuous with the paper discharge port 14 of the image forming apparatus A is provided. The conveyance path 34 is connected via a path switching flapper 36. A bookbinding path 33 is connected to the intermediate sheet transport path 32 via the stacking unit 40, and a post-processing path 38 is connected to the cover sheet transport path 34. The bookbinding path 33 is arranged in a direction that cuts 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.

  The bookbinding path 33 and the cover sheet transport path 34 intersect (orthogonal) each other, and a processing stage (cover sheet binding position) F described later is disposed at the intersecting portion. The 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, a print sheet (saddle stitching sheet) Sn on which content information is printed and a print sheet (cover sheet) Sh on which a title used as a cover cover is printed are carried out from the image forming apparatus A. In this way, the 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, the inserter unit 26 is connected to the carry-in path 31 so that cover sheets Sh 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 carry-in path 31. It is. A kick roller 26k and a separating unit 26s are disposed on the paper feed tray 26a. The kick roller 26k feeds out the sheets on the tray, separates them one by one by the separating unit 26s, and transports them downstream. A paper feed path 27 connected to the transport path 31 is provided on the downstream side of the separating unit 26s.

  Therefore, the transport roller 31b is provided in the carry-in path 31, the transport roller 32a is provided in the intermediate paper transport path 32, the grip transport means 47, a bundle posture deflecting means 64 described later, and a paper discharge roller (paper discharge means) in the bookbinding path 33. 66 is arranged. Further, a transport roller 34a is disposed in the cover transport path 34, and a transport roller 38a is disposed in the post-processing path 38, and each is coupled to a drive motor.

  The structure of the cover transport path 34 will be described. The cover transport path 34 is arranged so as to branch from the carry-in path 31 and intersect with the bookbinding path 33, and a processing stage (cover binding position) F is disposed at this intersection. Yes. In the bookbinding path 33, a transport roller 34a for transporting the cover sheet Sh and an aligning mechanism 35 are arranged. The path guide forming the cover transport path 34 includes a movable guide 34g that can move up and down between a guide posture and a retracted posture on the upstream side and the downstream side of the processing stage F. This is because when the cover sheet Sh is guided to the processing stage F, it is positioned in the guide position, and when the cover sheet Sh is folded back, it is shifted to the retracted position.

  The aligning mechanism 35 is provided in the cover sheet conveyance path 34, and includes a nip claw 35a that locks the rear end of the cover sheet Sh, and an alignment member 35b that offsets the cover sheet Sh held by the nip claw 35a in the conveyance orthogonal direction. And a forward / reverse roller (not shown) for switching back the cover sheet Sh sent to the cover transport path 34 so as to abut the nip claw 35a. The forward / reverse roller is configured to be movable up and down to a standby position retracted upward from the cover sheet Sh.

  Accordingly, the cover sheet Sh carried into the cover sheet transport path 34 is switchback-conveyed by the reverse rotation of the forward / reverse rotation roller after the timing when the rear end thereof passes the aligning mechanism 35. Then, the rear end of the sheet is abutted against the nip claw 35a and the skew (skew) is corrected. In this state, the nip claw 35a grips the trailing end of the sheet, and the alignment member 35b on which the nip claw 35a is mounted moves in the width direction in the conveyance orthogonal direction. As a result, the cover sheet Sh is corrected for skew in the front-rear direction and the position in the width direction (conveyance orthogonal direction) is corrected (side edge position correction). The cover sheet Sh thus corrected for alignment is conveyed and set toward the processing stage F on the downstream side by the forward and reverse rotation rollers. The feeding set to the processing stage F is performed by transporting a predetermined amount of the cover sheet Sh from the aligning position.

[Configuration of stacking unit]
The stacking tray 41 disposed at 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. As shown in FIG. 2, the stacking tray 41 is composed of 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. The print sheet from the paper discharge port 32b is guided onto the stacking tray 41 by the carry-in guide 42b and stored by the forward / reverse roller 42a. The forward / reverse roller 42a transfers the print sheet to the front end side of the stacking tray 41 by forward rotation, and abuts and regulates the sheet rear end against the regulating member 43 disposed at the rear end of the tray (right end in FIG. 2) by reverse rotation. Further, the stacking tray 41 is provided with sheet side aligning means (not shown), and both side edges of the printed sheets stored on the tray are aligned to the reference position. With such a configuration, the print sheets from the intermediate paper conveyance path 32 are sequentially stacked on the stacking tray 41 and are aligned in a bundle.

  The stacking tray 41 is provided with a sheet bundle thickness identification means (not shown) so as to detect the thickness of the sheet bundle stacked on the tray. For example, the thickness of the sheet bundle can be identified by providing a paper touch piece in contact with the uppermost sheet on the tray and detecting the position of the paper touch piece with a sensor. As the other sheet bundle thickness identifying means, for example, a sheet that is carried out from the paper discharge sensor Se3 onto the stacking tray is detected, and a counter for counting signals from this sensor is provided, and a job end signal from the image forming apparatus A is provided. The thickness of the sheet bundle can be identified by multiplying the total number of counted sheets by the average paper thickness.

[Configuration of sheet bundle conveying means]
In the bookbinding path 33, grip conveying means 47 for transferring the sheet from the stacking tray 41 to the adhesive application position E on the downstream side is disposed. As shown in FIG. 2, the grip conveying means 47 deflects the sheet bundle stacked on the stacking tray 41 from the horizontal posture to the 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 stacking 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 of the bookbinding path 33. As shown in FIG. 3A, the adhesive application means 55 includes 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 (see FIG. 2) for detecting 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. Further, heating means 50 such as an electric heater is embedded in the paste container 56. The glue sensor 56S and the heating means 50 are connected to a control CPU 75, which will be described later, and 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 reciprocates along the sheet bundle. The conceptual diagram is shown in FIG. 3B, and the glue container 56 is formed in a short length (dimension) with respect to the lower end edge of the sheet bundle (the back cover portion at the time of bookbinding) S1, and the coating contained therein It is supported by the guide rail 52 of the apparatus frame so as to move along the lower edge S1 of the sheet bundle together with the roll 57. The glue container 56 is connected to a timing belt 53 attached to the apparatus frame, and a driving motor MS is connected to the timing belt 53.

  Therefore, the glue container 56 is reciprocated by the drive motor MS between the home position HP and the return position RP where the backward operation is started along the sheet bundle. Each position is set to the positional relationship shown in FIG. 3B, and the return position RP is set based on sheet width size information. Further, when the apparatus power is turned on (initial time), the home position HP is set, and after a predetermined time from the sheet grip signal of the grip sensor Sg provided in the preceding grip conveying means 47, for example (sheet bundle is adhesive application position E). (Estimated time to reach) from the home position HP to the return position RP. Simultaneously with this movement, the application roll 57 starts to rotate by the roll rotation motor MR. Note that SP shown in the figure is a home position sensor for the glue container 56. The adhesive application means 55 configured in this manner is rotated by the drive motor MS, and the glue container 56 starts to move along the guide rail 52 from the left side to the right side in FIG. In this outward path, the application roll 57 is pressed against the sheet bundle to disperse the sheet end, and in the return path from the return position RP to the home position HP, a predetermined gap is formed with the sheet end to apply the adhesive. The feed amount of the grip conveying means 47 is adjusted by a lifting motor (not shown).

[Configuration of cover binding means]
A cover binding means 60 is disposed in the processing stage F of the bookbinding path 33. The cover binding means 60 includes a back plate 61, a back folding plate 62, and a folding roll 63, as shown in FIG. In the processing stage F, the above-described cover sheet conveyance path 34 is arranged, and the cover sheet Sh is fed from the image forming apparatus A or the inserter unit 26. Therefore, the back plate 61 is composed of a plate-like member that backs up the cover sheet Sh, and is disposed in the bookbinding path 33 so as to freely advance and retract. A saddle-stitched sheet bundle Sn1 is joined to the cover sheet Sh supported by the back plate 61 in an inverted T shape. Therefore, the back folding plate 62 is composed of a pair of left and right press members, and is configured to be moved toward and away 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. The folding roll 63 is composed of a pair of rollers that fold and finish the back-folded sheet bundle.

[Configuration of reinforcing material supply means]
Therefore, the present invention is characterized in that when the saddle stitch sheet bundle Sn1 and the cover sheet Sh are bound together in the processing stage F, the reinforcing sheet Sx is interposed on the back binding surface. Hereinafter, the embodiment will be described in the order of the first embodiment, the second embodiment, and the third embodiment.

“First Embodiment”
FIG. 4 shows a case where the reinforcing sheet Sx is fed and set on the back binding surface of the cover sheet Sh fed and set on the processing stage F, and the saddle stitched sheet bundle Sn1 coated with glue is bound on the reinforcing sheet Sx. In this case, the reinforcing sheet Sx is composed of a belt-like sheet having a high impregnation property made of a material having an appropriate strength such as a cloth, a synthetic resin, or a piece of paper. The illustrated reinforcing sheet Sx is formed of a woven fabric having an appropriate strength, and is knitted into a mesh that allows the adhesive to flow between the front and back surfaces. The reinforcing sheet Sx is wound in a roll shape and stored in the cartridge 81.

Accordingly, the reinforcing material supply means 80 includes a cartridge 81 and a transfer means (feeder means) 85 that pulls out the reinforcing tape Sx from the cartridge 81 and feeds the reinforcing tape Sx onto the cover sheet on the processing stage F. ing. The cartridge 81 is detachably mounted on the apparatus frame, and is configured in a container shape that houses the reinforcing tape Sx wound in a roll shape. The reinforcing tape Sx can be sequentially pulled out from a supply port 81a provided in the cartridge 81 (see FIG. 4B). The transfer means (feeder means) 85 is constituted by a slide member 86 that is pulled out to the back binding surface (shown in FIG. 4A) of the cover sheet Sh. A cutter 88 for cutting the rear end of the reinforcing sheet is disposed at the supply port 81 a of the cartridge 81.

  The slide member 86 is supported by a guide rail 86g so as to be movable along the back binding surface (center line; CL shown in FIG. 4B) at the center of the cover sheet supplied and set to the processing stage F, and this guide rail 86g. 4B is reciprocated in the left-right direction in FIG. Therefore, the slide member 86 is connected to a travel wire 86w stretched along the guide rail 86g, and a drive motor dM1 is connected to one of the pulleys that supports the travel wire 86w.

  The slide member 86 is equipped with a nip claw 86n that holds the tip of the reinforcing tape Sx and an operating solenoid 86S for the nip claw 86n. The nip claw 86n is for pulling out the tip of the reinforcing tape Sx from the cartridge 81. In the illustrated example, the pair of claw members are urged in the nip direction by a winding spring 86b and released by an operating solenoid 86S.

  As described above, the slide member 86 pulls out the front end of the reinforcing tape Sx from the cartridge 81 along the back binding surface (CL-CL) of the cover sheet Sh set on the processing stage F (FIG. 4B). Therefore, the slide member (feeder means) 86 pulls out the reinforcing sheet Sx from the cartridge 81 and feeds it to the back binding surface of the cover sheet Sh set on the processing stage F. A cutter 88 for cutting the rear end of the reinforcing sheet Sx is attached to the supply port 81a of the cartridge 81. This cutter 88 cuts the rear end of the tape with a solenoid 88S.

  Therefore, when the slide member 86 moves to a predetermined position (home position), the solenoid 88S is actuated by a signal from a position sensor (not shown), and the rear end of the reinforcing sheet Sx is cut by the cutter 88. Then, the reinforcing sheet Sx is dropped and set on the back binding surface of the cover sheet Sh whose rear end side is set downward. Next, the operating solenoid 86S is operated to release the nip claw 86n (nip release). Then, the entire reinforcing sheet Sx is placed on the back binding surface of the cover sheet Sh and set in an overlapping manner.

  In the first embodiment configured as described above, a control means (control CPU) 75 to be described later applies an adhesive to the back binding end surface of the saddle stitching sheet bundle Sn1 by the adhesive application means 55 described above. This adhesive application means 55 is arranged at an adhesive application position E prepared on the upstream side of the processing stage F. Then, the control means (control CPU) 75 feeds and sets the saddle stitch sheet bundle Sn1 at the adhesive application position E. This feeding set conveys the saddle stitched sheet bundle Sn1 gripped by the grip conveying means 47 to the adhesive application position E on the downstream side along the bookbinding path 33. Then, the adhesive is applied to the back binding end surface at the adhesive application position E. The control means (control CPU) 75 feeds and sets the cover sheet Sh to the processing stage F before and after the adhesive application operation to the saddle stitch sheet bundle Sn1. At this time, the conveyance roller (cover sheet feeding means) 34a of the cover sheet conveyance path 34 adjusts the conveyance amount to the bundle thickness so that the center center line of the cover sheet Sh is positioned at the center of the processing stage F based on the sheet bundle thickness information. Adjust according to. This sheet bundle thickness information is acquired from the sheet bundle thickness identifying means described above.

  Next, the control means (control CPU) 75 supplies the reinforcing sheet Sx on the cover sheet Sh fed and set to the processing stage F by the reinforcing material supply means 80 described above. The reinforcing sheet Sx is supplied by moving the feeder means (transfer means) 85 by the drive motor dM1 from the home position at the left end to the solid line position at the right end in FIG. 4 (b), and from the cartridge 81 arranged at this position to the leading end of the reinforcing sheet. Is gripped by the nip claw 86n. The gripping operation of the nip claw 86 is performed by energizing the operation solenoid 86S (the energization is OFF in the illustrated example). Next, the control means (control CPU) 75 operates the drive motor dM1 to move the slide member 86 toward the home position. Then, the reinforcing sheet Sx stored in the cartridge 81 is pulled out from one end (base end) of the cover sheet Sh toward the other end side. When the slide member 86 returns to the home position, the control means (control CPU) 75 operates the solenoid 88S by the signal from the position sensor that detects this, and the cutter 88 cuts the rear end portion of the reinforcing sheet Sx. Simultaneously with this cutting operation, the operating solenoid 86S is energized to release the nip by the nip claw 86n. Then, the reinforcing sheet Sx is superposed on the center back binding surface of the cover sheet Sh.

  Therefore, the control means (control CPU) 75 moves the saddle stitch sheet bundle Sn1 from the adhesive application position E onto the processing stage F. Then, the saddle stitch sheet bundle Sn1 is joined to the cover sheet Sh set on the processing stage F in an inverted T shape. At this time, the reinforcing sheet Sx is interposed between the back binding end surface of the saddle stitching sheet bundle Sn1 and the back binding surface of the cover sheet Sh, and the reinforcing sheet Sx is made of a base material rich in impregnation such as a woven fabric. Therefore, the adhesive sheet applied to the saddle stitch sheet bundle Sn1 bonds the cover sheet Sh and the reinforcing sheet Sx and the reinforcing sheet Sx and the saddle stitch sheet bundle Sn1.

“Second Embodiment”
Next, the second embodiment configures the reinforcing material supply means 80 with the same configuration as the first embodiment described above. In the first embodiment, the reinforcing sheet Sx is adhered to the cover sheet Sh with an adhesive applied to the saddle stitch sheet bundle Sn1, but the adhesive force may be weak. Therefore, in the second embodiment, an adhesive is applied to the reinforcing sheet Sx as follows. Therefore, the aforementioned control means (control CPU) 75 is configured as follows.

  As shown in FIG. 6A, the adhesive application to the saddle stitch sheet bundle Sn1, the cover sheet Sh feeding set, and the reinforcing sheet Sx feeding set are executed in the same manner as described above. Therefore, the control means (control CPU) 75 moves the saddle stitch sheet Sn from the adhesive application position E to the processing stage F (state shown in FIG. 6A (b)). Then, since the adhesive is applied to the back binding end surface of the saddle stitching sheet bundle Sn1, the reinforcing sheet Sx is first attached to the end surface of the saddle stitching sheet bundle Sn1. Therefore, the control means (control CPU) 75 retracts the above-mentioned grip conveying means 47 along the bookbinding path 33 to the adhesive application position E (state shown in FIG. 6B (c)). At this time, the reinforcing sheet Sx retreats to the adhesive application position E in a state where it is adhered to the end face of the saddle stitch sheet bundle Sn1. Therefore, the control means (control CPU) 75 applies the adhesive by the adhesive application means 55 to the saddle-stitched sheet bundle Sn1 with the reinforcing sheet Sx attached again. At this time, as the adhesive, the reinforcing sheet Sx and the adhesive impregnated in the reinforcing sheet Sx are applied (reapplied) to the back binding end surface of the saddle stitching sheet bundle Sn1.

  After this adhesive re-application operation, the control means (control CPU) 75 moves the saddle stitch sheet bundle Sh1 from the adhesive application position E onto the processing stage F. Then, the saddle stitched sheet bundle Sn1 and the reinforcing sheet Sx are joined in an inverted T shape to the cover sheet Sh waiting on the processing stage F. As described above, the reinforcing sheet Sx is interposed between the back binding end surface of the saddle stitching sheet bundle Sn1 and the back binding surface of the cover sheet Sh, and the three members are firmly bonded.

“Third Embodiment”
In FIG. 7, the saddle stitched sheet bundle Sn1 is fed and set at the adhesive application position E arranged upstream of the processing stage F, and the reinforcing sheet Sx is attached to the back stitching end surface of the sheet bundle, and then the adhesive The case of applying is shown. Since the reinforcing material supply means 80 is configured in the same manner as in the first embodiment described above, the same reference numerals are given and description thereof is omitted. As shown in FIG. 7, the adhesive application position E is provided with a cartridge 81 and a transfer means (feeder means) 85 for pulling out the reinforcing tape Sx from the cartridge 81 and feeding it onto the cover sheet Sh on the processing stage F. It has been. The cartridge 81 has a configuration similar to that described above and stores a roll-shaped reinforcing sheet Sx. The transfer means (feeder means) 85 is composed of a slide member 86 that is pulled out along the back-binding end face (S1 shown in FIG. 7) of the saddle stitching sheet bundle. A nip claw 86n and an operating solenoid 86S are mounted on the slide member 86 as described above. The slide member 86 is slidably supported by a guide rail 52 that reciprocally supports the glue container 56, and is fixed to a travel wire 86w connected to the drive motor dM1. Accordingly, the slide member 86 is configured to reciprocate along the back-binding end surface S1 of the saddle-stitched sheet bundle set at the adhesive application position E.

  With such a configuration, the control means (control CPU) 75 described later conveys and sets the saddle stitched sheet bundle Sn1 to the adhesive application position E along the bookbinding path 33. This feeding set conveys the saddle stitched sheet bundle Sn1 gripped by the grip conveying means 47 to the adhesive application position E along the bookbinding path 33 and stops and sets it at a preset position. Next, the control means (control CPU) 75 feeds the reinforcing sheet Sx along the back binding end surface S1 of the saddle stitching sheet bundle. For feeding the reinforcing sheet Sx, the feeder means 85 is moved by the drive motor dM1 from the home position at the left end in FIG. 7 to the solid line position at the right end. To do. The gripping operation of the nip claw 86n is performed by energizing the actuating solenoid 86S (the energization is OFF in the drawing). Next, the control means (control CPU) 75 operates the drive motor dM1 to move the slide member 86 toward the home position. Then, the reinforcing sheet Sx stored in the cartridge 81 is pulled out from one end (the right end in FIG. 7) of the saddle stitching sheet bundle Sn1 toward the other end side (the left end in FIG. 7). Then, the reinforcing sheet Sx is superposed and set on the saddle stitch sheet bundle Sn1 at the adhesive application position E along the lower end spine binding end surface.

  Therefore, the control means (control CPU) 75 applies the adhesive to the end face of the saddle stitching sheet bundle Sn1 from above the reinforcing sheet Sx by the adhesive application means 55. Since the reinforcing sheet Sx is made of a base material having a high impregnation property such as a woven fabric, an adhesive is attached to the reinforcing sheet Sx and the saddle stitch sheet bundle Sn1. Next, the control means (control CPU) 75 transfers the saddle stitch sheet bundle Sn1 attached with the reinforcing sheet Sx to the processing stage F. At this time, since the cover sheet Sh is fed and set to the processing stage F, the saddle stitch sheet bundle Sn1 is joined to the cover sheet Sh in an inverted T shape. At this time, the reinforcing sheet Sx is interposed between the back binding end surface S1 of the saddle stitching sheet and the back binding surface of the cover sheet Sh, and the three of the cover sheet Sh and the saddle stitching sheet bundle Sn1 are firmly bonded. Become. Thus, after apply | coating an adhesive agent from the reinforcement sheet Sx, the control means 75 cut | disconnects the rear end of the reinforcement sheet Sx with the cutter 88, and cancels | releases the nip nail | claw 86n.

  As described above, when applying the adhesive on the back binding surface of the saddle stitching sheet at the adhesive application position E, the control means 75 is configured as follows. In the first control method, as described above, the adhesive can be simultaneously applied to the back binding end surface of the saddle stitching sheet and the reinforcing sheet. In this case, a material having high permeability such as a cloth woven in a mesh shape is used as the reinforcing sheet.

  In the second control method, the adhesive applying means 55 applies an adhesive to the back-binding end surface of the saddle stitching sheet having the control means 75 conveyed and set to the application position E. The amount of adhesive applied at this time is adjusted according to the material of the reinforcing sheet Sx at the same time as the increase / decrease adjustment is made by the bundle thickness of the saddle stitching sheet, for example. Next, the control means 75 feeds the reinforcing sheet Sx to the back binding surface of the saddle stitching sheet to which the adhesive is applied. Then, the adhesive is applied again from above the reinforcing sheet Sx by the adhesive application means 55. By configuring the control means 75 in this way, it is possible to use a non-permeable material such as a plastic sheet or a metal sheet for the reinforcing sheet Sx.

[Configuration of control means]
Next, the configuration of the control means in the above apparatus will be described with reference to FIG. This figure is a control block diagram. In a system in which the image forming apparatus A and the bookbinding apparatus B are connected as shown in FIG. 1, for example, the control CPU 70 provided in the image forming apparatus A has a control panel 71 and mode setting means. 72 is provided. A control CPU 75 is provided in the control unit of the bookbinding apparatus B, and the control CPU 75 calls a bookbinding process execution program from the ROM 76 and executes each process in the bookbinding path 33.

  Further, the control CPU 75 receives a post-processing mode instruction signal, a job end signal, sheet size information, and other information required for bookbinding and a command signal from the control CPU 70 of the image forming apparatus A. On the other hand, in the carry-in path 31, the bookbinding path 33, and the cover sheet transport path 34, sheet sensors Se1 to Se6 for detecting the sheet (sheet bundle) to be transported are arranged at the positions illustrated in FIG. Therefore, the detection signal of each of the sheet sensors Se1 to Se6 is transmitted to the control CPU 75, and the control CPU 75 performs “stacking unit control unit 75a” “adhesive application unit control unit 75b” “cover cover binding unit control unit 75c” “cutting unit control unit”. 75d "," stack controller 75e "and" adhesive temperature controller 79 ".

  Next, the bookbinding method according to the present invention will be described. The present invention is characterized in that, as described above, the reinforcing sheet Sx is simultaneously attached to the back when the saddle stitch sheet is bound and bound to the cover sheet. The bookbinding procedure will be described based on the flowchart shown in FIG.

  When the post-processing mode and the image forming mode are set in the image forming apparatus A, the image forming apparatus A sequentially forms an image on the sheet and carries the sheet to the paper discharge port 14 (St01). The sheet (saddle stitched sheet Sn) carried out to the paper discharge port 14 of the image forming apparatus A is transferred from the sheet carry-in path 31 to the bookbinding apparatus B. Therefore, when the “bookbinding processing mode” is set, the control CPU 75 of the bookbinding apparatus guides the saddle stitch sheets Sn to the stacking tray 41 and stacks them on the tray (St02). Upon receiving a job end signal from the image forming apparatus A, the control CPU 75 moves the stacking tray 41 downward in FIG. 2 and takes over the sheet bundle on the tray to the grip conveying means 47. Therefore, the grip conveying means 47 turns the sheet bundle approximately 90 degrees so that the back end face is on the lower side and moves to the adhesive application position of the bookbinding processing path 33 (St04). Next, the image forming apparatus A prints a cover image on the designated sheet and carries it out from the paper discharge outlet 14. In the bookbinding apparatus B, the cover sheet is received by the sheet carry-in path 31 and guided to the cover transport path 34 via the path switching flapper 36. In this path 34, after correcting the registration of the cover sheet, it is fed to the processing stage F and set (St06).

  The above-mentioned grip conveying means 47 is provided with a sheet bundle thickness detecting means (not shown), and the cover sheet is positioned and set on the processing stage F based on the sheet bundle thickness information from the detecting means. Therefore, the control CPU 75 moves the slide member 86 along the rail 86g. Then, the reinforcing sheet Sx gripped by the nip claw 86n of the slide member 86 is pulled out from the cartridge 81 by a predetermined amount. Then, the reinforcing sheet Sx is overlaid on the cover sheet Sh on the back binding surface of the cover sheet (St07). Therefore, the rear end of the reinforcing sheet is cut with a cutter 88.

  When the superposition of the cover sheet Sh and the reinforcing sheet Sx is completed, the control CPU 75 moves the above-described adhesive application means 55 along the back end face of the saddle stitching sheet Sn (St10) and applies the adhesive (St11). Next, the control CPU 75 moves the saddle stitch sheet Sn from the adhesive application position E to the processing stage F (St12). At this time, the back plate 61 is held at a position where the cover sheet Sh is backed up, and the cover sheet Sh and the saddle stitching sheet Sn are joined in an inverted T shape. In this state, the back folding plate 62 press-molds the shoulder portion of the cover sheet with a drive motor (not shown) (St13). After the back folding, the control CPU 75 retracts the back plate 61 from the bookbinding path 33 after a predetermined adhesive curing time has elapsed. Then, the back-bound sheet bundle is folded back by the folding roll 63 and sent to the cutting position G on the downstream side. At the cutting position G, the peripheral edge is cut and aligned by the cutting means 65 while rotating in the order of the top, the ground, and the fore edge of the sheet bundle by the bundle posture deflecting means 64 (St15). Next, the control CPU 75 stores the sheet bundle after the cutting process in the storage stacker 67 (St16).

  As described above, the bookbinding method according to the present invention includes a cover sheet feeding step (step St06 described above) for feeding a cover sheet to a predetermined cover binding position, and a predetermined process on the cover sheet fed to the cover binding position. Reinforcing sheet setting step (previously described step St07) for superimposing reinforcing sheets on the position, and adhesive layer forming step (previously described step St11) for attaching an adhesive layer to the back end face of the saddle stitching sheets that are aligned in a bundle Then, each step of the cover binding step (the above-mentioned step St14) for binding the saddle stitching sheet to the cover sheet on which the reinforcing sheet is superimposed is executed. Although the above-described first embodiment has been described above, the bookbinding procedure of the second and third embodiments is the same, and the description thereof is omitted.

1 is an explanatory diagram showing an image forming system provided with a bookbinding apparatus according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The structure of the adhesive application means in the apparatus of FIG. 2 is shown, (a) is a structure explanatory drawing of an adhesive agent container, (b) is explanatory drawing of an application state. It is explanatory drawing of the supply structure of the reinforcement sheet in the apparatus of FIG. 2, (a) shows the planar structure, (b) shows a side structure. Explanatory drawing which shows the bookbinding finishing state in the apparatus of FIG. FIGS. 3A and 3B are explanatory diagrams of a bookbinding state in the apparatus of FIG. 2, in which FIG. 3A shows a state in which a cover sheet is fed to the processing stage, and FIG. FIGS. 3A and 3B are explanatory diagrams of a bookbinding state in the apparatus of FIG. 2, in which FIG. 2C illustrates a state in which a saddle stitching sheet is fed to a processing stage, and FIG. . FIGS. 3A and 3B are diagrams illustrating a bookbinding state in the apparatus of FIG. 2, in which FIG. 2E illustrates a state in which the saddle stitching sheet, the reinforcing sheet, and the cover sheet are bound together in the processing stage, and FIG. FIG. 5 is an explanatory view showing a form different from the apparatus of FIG. 4 in the reinforcing sheet supply structure in the apparatus of FIG. 2. The block diagram which shows the control structure in the apparatus of FIG. 3 is a flowchart showing bookbinding processing operations in the apparatus of FIG.

Explanation of symbols

A Image forming apparatus B Bookbinding apparatus C Post-processing apparatus E Adhesive application position F Processing stage (cover binding position)
Sn Saddle Stitched Sheet Sn1 Saddle Stitched Sheet Bundle Sh Cover Sheet S1 Lower edge of sheet bundle (back cover part at the time of bookbinding)
Sx Reinforcement sheet 30 Casing 31 Carry-in path 31a Carry-in entrance 31b Transport roller 32 Middle paper transport path 32a Transport roller 32b Paper discharge port 33 Bookbinding path 34 Cover sheet transport path 34a Transport roller (cover sheet feeding means 56)
34g Movable guide 35 Aligning mechanism 35a Nip claw 35b Alignment member 36 Path switching flapper 38 Post-processing path 38a Conveying roller 40 Stacking unit 41 Stacking tray 42a Forward / reverse roller 42b Loading guide 43 Restricting member 47 Grip transporting means 50 Heating means 52 Guide rail 53 Timing belt 55 Adhesive application means 56 Glue container 57 Application roll 60 Cover binding means 61 Backing plate 62 Back folding plate 63 Folding roll 64 Bundle orientation deflecting means 66 Paper discharge roller (paper output means)
75 Control CPU (control means)
80 Reinforcing material supply means 81 Cartridge 81a Supply port 85 Transfer means (feeder means)
86 Slide member 86b Winding spring 86g Guide rail 86n Nip claw 86S Actuation solenoid 86w Traveling wire 88 Cutter 88S Solenoid Se3 Paper discharge sensor Sg Grip sensor SP Home position sensor MR Roll rotation motor MS Drive motor dM1 Drive motor

Claims (9)

A bookbinding apparatus comprising a processing stage for binding a saddle-stitched sheet aligned in a bundle with a cover sheet,
An adhesive application means disposed on the upstream side of the processing stage, and applying an adhesive to the back end face of the saddle stitching sheet;
A cover sheet feeding means for feeding a cover sheet to the processing stage;
Reinforcing material supply means for feeding the reinforcing sheet to the back binding surface of the cover sheet on the processing stage;
A cover binding means disposed on the processing stage and configured to fold back a cover sheet on the saddle stitching sheet;
Control means for controlling the cover sheet feeding means, the reinforcing material supply means, and the cover binding means,
The control means includes
(1) Supply a cover sheet to the processing stage,
(2) Supply a reinforcing sheet on the cover sheet on this processing stage,
(3) After joining the saddle stitching sheet and the cover sheet with the reinforcing sheet interposed therebetween, the cover sheet is back-folded,
The bookbinding apparatus is configured as described above. The control means includes
When joining the saddle stitching sheet and the cover sheet with the reinforcing sheet interposed,
Supply the reinforcing sheet to the back binding surface of the cover sheet and set the polymerization,
2. The bookbinding apparatus according to claim 1, wherein the saddle stitching sheet applied with the adhesive by the adhesive applying means is joined to the back binding surface of the cover sheet on which the reinforcing sheets are superimposed. . The control means includes
When joining the saddle stitching sheet and the cover sheet with the reinforcing sheet interposed,
Supply the reinforcing sheet to the back binding surface of the cover sheet and set the polymerization,
After the reinforcing sheet on the cover sheet is attached to the saddle stitching sheet coated with an adhesive, the adhesive is applied again to the reinforcing sheet and the saddle stitching sheet by the adhesive applying means. The bookbinding apparatus according to claim 1. The bookbinding apparatus according to any one of claims 1 to 3, wherein the reinforcing sheet is made of a belt-like base material such as a porous cloth, a synthetic resin, or a piece of paper. The reinforcing material supply means includes
A reinforcing material cartridge for storing the reinforcing sheet in a roll shape;
Transfer means for feeding a reinforcing sheet from the reinforcing material cartridge to a predetermined position of the cover sheet on the processing stage;
The bookbinding apparatus according to claim 4, comprising: A bookbinding apparatus comprising a processing stage for binding a saddle-stitched sheet aligned in a bundle with a cover sheet,
An adhesive application means that is disposed at an adhesive application position on the upstream side of the processing stage, and that applies an adhesive to the back end face of the saddle stitching sheet;
Reinforcing material supply means for feeding a reinforcing sheet to the back binding surface of the saddle stitching sheet at the adhesive application position;
A cover sheet feeding means for feeding a cover sheet to the processing stage;
A cover binding means disposed on the processing stage and configured to fold back a cover sheet on the saddle stitching sheet;
Control means for controlling the adhesive application means, the cover sheet feeding means, the reinforcing material supply means, and the cover binding means,
The control means includes
After the reinforcing sheet is fed to the back binding surface of the saddle stitching sheet at the adhesive application position, the adhesive is applied to the reinforcing sheet and the saddle stitching sheet by the adhesive applying means, and the adhesive is applied. A sheet and a saddle stitching sheet are joined to the cover sheet and back folded.
The bookbinding apparatus is configured as described above. The adhesive application means includes
An adhesive container containing a hot-melt adhesive;
Guide means for supporting the adhesive container in a reciprocating manner along a saddle stitch sheet at the adhesive application position;
Drive means for reciprocating the adhesive container along the guide means,
The reinforcing material supply means includes
A reinforcing material cartridge for storing the reinforcing sheet in a roll shape;
A conveying means for feeding a reinforcing sheet from the reinforcing material cartridge to a predetermined position of the cover sheet on the processing stage,
The bookbinding apparatus according to claim 6, wherein the transfer means is arranged on the guide rail and is configured to reciprocate along the saddle stitching sheet by the driving means. The control means includes
After the adhesive is applied to the saddle stitching sheet at the adhesive application position by the adhesive application means, the reinforcing sheet is fed to the back binding surface of the saddle stitching sheet, and the adhesive is further applied on the reinforcing sheet. The bookbinding apparatus according to claim 6, wherein the bookbinding apparatus is configured to apply. An image forming apparatus having image forming means for forming an image on a sheet;
A stacking unit that stacks and stacks sheets from the image forming apparatus;
A bookbinding apparatus provided with a processing stage for binding the saddle stitched sheets aligned by the stacking means with a cover sheet;
Consisting of
An image forming system, wherein the bookbinding apparatus has the configuration according to claim 1.

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