JP2011068101A - Bookbinding device and image forming system equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bookbinding device wherein finishing quality is superior and cut paper pieces can be easily processed when an arranged sheet bundle is bound by an adhesive and a peripheral edge thereof is cut to be lined up. <P>SOLUTION: The bookbinding device has a cutting amount setting means which sets a cut region in a top part or a ground part based on size information and bundle thickness information of a sheet bundle to be subjected to a bookbinding finishing, and applies no adhesive or reduces an applying amount thereof in the cut region calculated with the means when applying the adhesive on a back part of the sheet bundle with an adhesive applying means. Thereby, since the cut region is not applied with the adhesive, there is no possibility of damaging a cutting blade and occurring of wrinkle or unevenness in a cut part when cutting the top part or the ground part. The paper pieces can be reused as a recycled paper because of containing no block of the adhesive or a minute amount thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bookbinding apparatus that applies an adhesive to the back end face of a bundle of sheets that have been stacked together and binds them together, and relates to an improvement in an adhesive application mechanism for trimming and aligning the periphery of a sheet bundle that has been bound together. .

  In general, this type of bookbinding apparatus is a terminal device of an image forming apparatus such as a printer or a printing machine. After the sheets on which the images have been formed are arranged and arranged in the order of pages, an adhesive is applied to the back end face of the sheets to bind them together. Bookbinding) or case binding (case binding) with a cover sheet. Such a bookbinding apparatus is a device separated from the image forming apparatus, and stacks the printed sheets in a bundle and applies an adhesive to the edge (back) of the sheet and binds it to a cover sheet that is fed separately. There are cases where it is used as a stand-alone device for mounting, and cases where it is used as a terminal device of a system which is connected to a paper discharge port of an image forming apparatus and sequentially receives printed sheets and finishes them into a booklet.

  For example, Patent Document 1 proposes a system for automatically bookbinding finishing a sheet output from an image forming apparatus. In this document, the sheet output from the image forming apparatus is received from the sheet discharge port, guided to the sheet discharge path, and collected and aligned on a tray provided on the downstream side of the sheet discharge path. Guide to the processing route. In the bookbinding path, an adhesive application unit is provided at an adhesive application position, and a cover binding position is provided downstream thereof, and a cover sheet supply path is connected to this position.

  An apparatus is disclosed in which an adhesive is applied to the spine binding end surface of the bundle of sheets that are collected in a uniform manner by an adhesive applying means and case binding is performed with a cover sheet. In the same document, cutting means for cutting and aligning (trimming cut) the peripheral edge of the bound sheet bundle is arranged. Therefore, the sheets formed with the image forming apparatus are aligned and collected by the bookbinding apparatus, and after the adhesive is applied to the back binding end surface, the sheets are bound to the cover sheet, and the peripheral edge is trimmed and aligned.

  On the other hand, in such an apparatus, an application unit that applies an adhesive to the end face of a sheet bundle includes a glue container that contains a hot-melt adhesive (hot melt adhesive), and an adhesive disposed on the peripheral surface of the adhesive container. And a driving means for rotating the roller. The adhesive is applied by moving from one end of the sheet bundle to the other end while rotating the application roller.

JP 2007-260977 A

  In the bookbinding apparatus as described above, when an adhesive is applied to a sheet bundle for bookbinding, conventionally, the adhesive is uniformly applied from one end to the other end. For this reason, the following inconvenience occurs when the peripheral edge is trimmed and trimmed after the bookbinding process.

  When the top part or the ground part of the sheet bundle is cut, the solidified adhesive is cut. For this reason, when the drying time of an adhesive agent is too long, adhesive agent hardness will become high and will affect the lifetime of a cutting blade. On the other hand, if the drying time is too short, the spine is cut with a low adhesive hardness, resulting in wrinkles and irregularities in the back binding. At the same time, the waste paper pieces cut in the top or ground trimming cut are stored in a waste box in a state of being bound in a strip shape. On the other hand, the scrap paper pieces at the fore edge that do not include the binding margin are stored in a single sheet state.

  The waste paper pieces accommodated in this way are reused as raw materials for recycled paper, while the paper pieces that do not contain adhesive are reused when paper sheets containing the binding margin for adhesive are mixed in some of them. Is removed, or the whole is disposed as non-recyclable waste waste, and the processing of the paper scrap after trimming cut is troublesome.

  Therefore, the present inventor calculated the cutting area in advance when applying the adhesive to the back binding surface of the sheet bundle, and the idea of not applying the adhesive to the cutting area or reducing the application amount. It came.

  The main object of the present invention is to provide a bookbinding apparatus that is excellent in finishing quality and easy to process a cut piece of paper when the aligned sheet bundles are bound together with an adhesive to cut and align the periphery. Another object of the present invention is to provide a bookbinding apparatus that can always perform a finish process that is aesthetically pleasing without being affected by the cooling time of the adhesive when the edges of the bound sheet bundle are cut and aligned.

  In order to achieve the above object, the present invention provides a cutting amount setting means for setting the top or ground cut area from the size information of the sheet bundle to be finished and the bundle thickness information, and the adhesive application means provides a sheet. When the adhesive is applied to the back portion of the bundle, the adhesive is not applied to the cut area calculated by this means, or the application amount is reduced. Thereby, when cutting the top portion or the ground portion, no adhesive is applied to the cut region, so that there is no fear of damaging the cutting blade, and no wrinkles or irregularities are generated in the cut portion. At the same time, the paper scraps do not contain adhesive lumps or the amount thereof is very small, so that they can be reused as recycled paper.

  Furthermore, in order to describe the configuration in detail, a bookbinding apparatus that trims and aligns the peripheral edges after binding a bundle of aligned sheets, and includes a sheet bundle conveying means for transferring the sheet bundle in the order of application position and cutting position. A path (42), an adhesive application means (52) disposed at the application position and applying an adhesive to the back of the sheet bundle, and a cutting means disposed at the cutting position and cutting at least the top or ground of the sheet bundle. (63), and a control means (78) for controlling the sheet bundle conveying means, the adhesive applying means, and the cutting means.

  The control means is provided with a cutting amount setting means (71) for setting the top or ground cut area from the size information of the aligned sheet bundle and the bundle thickness information. Therefore, this control means controls the adhesive application means so that it is not applied to the cut area calculated by the cutting amount setting means when the adhesive is applied to the back of the sheet bundle by the adhesive application means or the application amount is reduced. To do.

  In the present invention, when the adhesive is applied to the back portion of the sheet bundle by the adhesive application unit, the adhesive is not applied to the cut area calculated by the cutting amount setting unit, or the application amount is reduced. There are the following effects.

  When cutting the top part or the ground part of the sheet bundle bound with the adhesive, the adhesive is not applied to the cut area, or the application amount is reduced, so that the cutting blade may be damaged. The life and durability can be improved. At the same time, since there is no adhesive (or a very small amount) in the portion cut by the cutting blade, no wrinkles or irregularities are generated in the spine portion even if the adhesive hardness is incomplete.

  At the same time, the paper scrap when cutting is finished does not include the adhesive lump or the amount thereof is very small, so that it can be reused as recycled paper without sorting the paper scrap.

  Furthermore, the present invention provides a cut that is not coated with glue on the top portion or the ground portion by controlling to cut from the top portion or the ground portion and finally to cut the small edge portion when the peripheral edge of the sheet bundle is cut and finished. It is possible to reduce the possibility that the paper sheet in the area curls and deforms, and that the paper sheet in the cut area bends when the posture of the sheet bundle is deflected.

1 is an explanatory diagram of an overall configuration of an image forming system forming system according to the present invention. FIG. 2 is an explanatory diagram of a bookbinding apparatus in the system of FIG. 1. It is explanatory drawing of the adhesive agent coating unit in the bookbinding apparatus of FIG. 2, (a) is a perspective explanatory drawing of the whole structure, (b) is the center longitudinal cross-sectional view. An embodiment (first embodiment) of the application operation of the adhesive application unit is shown, (a) is an explanatory view of stroke control of the application roller, and (b) is an enlarged explanatory view of the application state. 2 shows an embodiment (second embodiment) of the adhesive application unit in the apparatus of FIG. 2 different from FIG. 4, (a) is an explanatory view of stroke control of the application roller, and (b) is a partial explanatory view of the application state. . 2 shows an embodiment (third embodiment) of the adhesive application unit in the apparatus of FIG. 2 different from FIG. 4, FIG. 5 (a) is a perspective explanatory view showing the configuration of the application amount adjusting blade, and FIG. FIG. 6 is an explanatory diagram showing the relationship between the application amount adjusting blade and the application amount adjusting blade; FIG. FIG. 3 is an explanatory diagram of the overall configuration of a bundle transport unit in the bookbinding apparatus of FIG. FIG. 3 is an explanatory diagram illustrating a relationship between a sheet bundle of a cutting unit and a cutting blade in the apparatus of FIG. 2. FIG. 9 is an explanatory diagram of an operation state of the sheet bundle cutting mechanism in FIG. 8, where (a) shows a planar state and (b) shows a sectional state. FIGS. 3A and 3B are explanatory diagrams of a cutting amount setting unit in the bookbinding apparatus of FIG. 2, where FIG. 3A is an explanatory diagram of a trimming cut state of a sheet bundle, FIG. 2B is an explanatory diagram of a cutting amount of a saddle stitching sheet, and FIG. FIG. The block diagram which shows the control structure in the system of FIG.

  Hereinafter, the present invention will be described in detail according to the illustrated embodiments. As shown in FIG. 1, the image forming system according to the present invention aligns and accumulates an image forming apparatus A that forms an image on a sheet and an image-formed sheet that is connected to a paper discharge port 14 of the image forming apparatus A. And a bookbinding apparatus B that performs bookbinding. The illustrated apparatus further includes a post-processing apparatus C on the downstream side of the bookbinding apparatus B.

  The image forming apparatus A forms an image on a sheet by an image forming method such as electrostatic printing, ink jet printing, or offset printing, and carries it out from the paper discharge port 14. The bookbinding apparatus B is connected to the paper discharge port 14, collects and stacks the image-formed sheets, applies an adhesive to the spine portion, binds it into a booklet, and trims and cuts the periphery. After cutting and finishing, it is configured to be stored in the storage stacker 74. Hereinafter, the image forming apparatus A, the bookbinding apparatus B, and the post-processing apparatus C will be described in this order.

[Image forming apparatus]
The image forming apparatus A can employ various printing mechanisms as described above. As an example, an electrostatic printing mechanism will be described and the configuration thereof will be described. In the illustrated 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 19 on which an original sheet is placed and set, a carriage 21 that scans an original image along the platen 19, 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 23 for automatically feeding a document sheet to the platen is provided on the platen 19.

[Bookbinding device]
The bookbinding apparatus B according to the present invention will be described. The bookbinding apparatus B is a stand-alone configuration in which an image is formed by an external printing apparatus and the aligned sheet bundle is bound by binding with an adhesive applied to the edge thereof. Alternatively, as shown in FIG. 1, it is configured as a terminal device of a system connected to the image forming apparatus. Then, the bookbinding finish is either a top-bound binding that binds and binds an adhesive to an image-formed sheet bundle (hereinafter referred to as “saddle sheet bundle”), or a case binding that binds a saddle stitch sheet bundle to a cover sheet, Configure to bind to either.

  Therefore, the bookbinding apparatus B includes a bookbinding path 42 that guides the saddle stitch sheet bundle from the application position Px to the cutting position Pz. At the application position Px, an adhesive application unit 52 that applies an adhesive to the back-binding end surface of the sheet bundle is disposed, and at the cutting position Pz, a cutting unit 63 that trims and aligns the periphery of the bound sheet bundle. In the bookbinding path 42, a sheet bundle conveying means 43 for transferring the saddle stitch sheet bundle from the application position Px to the cutting position Pz along the path is arranged.

  Further, a cutting amount setting means for setting the cutting area of the top portion and / or the ground portion (hereinafter referred to as “top and bottom portion”) of the saddle stitch sheet bundle in the control means 78 for controlling the adhesive application means 52 and the cutting means 63. 71 is provided. The cutting amount setting means 71 is configured to calculate the top cut area (trimming cut width) Lc at the time of cutting finish before the adhesive applying means 52 applies the adhesive. Therefore, the control unit 78 does not apply the adhesive to the cut region Lc set by the cutting amount setting unit 71 when the adhesive application unit 52 applies the adhesive to the back portion of the saddle stitch sheet bundle, or reduces the application amount. The adhesive applying means 52 is configured to be controlled.

  The above-mentioned adhesive application unit 52 supplies the adhesive to the application roll 53 and the application roll 53 that moves from one end to the other end of the saddle stitch sheet bundle supported by the sheet bundle conveying unit 43. The glue container 54 is used.

  Then, the control means 78 is configured not to apply the adhesive to the cut region Lc of the saddle stitch sheet bundle with the moving stroke of the application roll 53 (first embodiment described later), or (2) the application roll 53. Whether the adhesive gap is not applied to the cut region Lc of the saddle stitch sheet bundle by adjusting the application gap Ga between the sheet bundle and the end face of the sheet bundle, or the application amount is reduced (second embodiment described later). Or (3) the adhesive layer applied to the end face of the saddle stitch sheet bundle with the application roll 53 is scraped off with the application amount adjusting blade 55, or the adhesive is not applied to the cut region Lc of the saddle stitch sheet bundle, or the applied amount (3rd Embodiment mentioned later) is comprised.

  The cutting amount setting means 71 described above sets the cut area Lc of the top and bottom. The method is such that the operator calculates the cut amount and designates input from, for example, a control panel (described later) 18 of the image forming apparatus A. And a method of calculating by an apparatus control unit (image forming apparatus or bookbinding apparatus controller). The form calculated by the control unit 75 of the image forming apparatus A will be described later.

  Next, the configuration of the bookbinding apparatus B will be described with reference to FIG. The illustrated bookbinding apparatus B is a case binding apparatus that binds a saddle stitch sheet bundle and a cover sheet. The bookbinding path 42 is provided with a stacking tray 38 for aligning and stacking sheets fed from the image forming apparatus A on the upstream side of the coating position Px. A cover binding position Py is provided between the application position Px and the cutting position Pz, and a cover binding means 58 is disposed. The configuration will be described sequentially below.

  The bookbinding apparatus B accumulates printing sheets in a bundle in the casing 29 and stacks them together, an adhesive application means 52 for applying adhesive glue to the sheet bundle from the stacking unit 37, and an adhesive. The cover sheet binding unit 58 binds the cover sheet to the sheet bundle.

[Configuration of transport route]
The conveyance path of each sheet will be described. In the casing 29, a carry-in path 31 having a carry-in port 30 connected to the paper discharge port 14 of the image forming apparatus A is provided. From the carry-in path 31, the intermediate paper carry path 32 and the cover sheet are provided. The conveyance path 34 is connected via a path switching flapper 36. A bookbinding path 42 is connected to the intermediate sheet transport path 32 via the stacking unit 37, and a post-processing path 35 is connected to the cover sheet transport path 34. The bookbinding path 42 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 42 and the cover sheet transport path 34 intersect (orthogonal) each other, and a cover binding means 58 described later is disposed at the intersection. 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, the image forming apparatus A carries out a print sheet (saddle sheet) on which content information is printed and a print sheet (cover sheet) on which a title used as a cover cover is printed. 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, an inserter device 25 is connected to the 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 26 one by one and supplied to the carry-in path 31. is there. The inserter device 25 is provided with one or a plurality of stages of paper feed trays 26. A paper feed means for separating and feeding the stacked sheets one by one at the front end of the tray, and a downstream side of the paper feed means. A paper feed path 27 is provided, and the paper feed path 27 is connected to the carry-in path 31 via a path switching piece 28.

  The carry-in path 31 has a conveyance roller 31a, the intermediate-sheet conveyance path 32 has a conveyance roller 32a, and the bookbinding path 42 has a sheet bundle conveyance unit 43, a bundle posture deflection unit 62, and a discharge roller (discharge unit). ) 72 is arranged. Similarly, a transport roller 34a is disposed in the cover transport path 34, and a transport roller 35a is disposed in the post-processing path 35, and each is coupled to a drive motor.

[Configuration of stacking unit]
A stacking tray 38 disposed at the paper discharge port 33 of the intermediate paper conveyance path 32 stacks and stores sheets from the paper discharge port 33 in a bundle. As shown in FIG. 2, the stacking tray 38 is constituted by a tray member arranged in a substantially horizontal posture, and a forward / reverse roller 39 and a carry-in guide 40 are provided above the tray member. The print sheet from the paper discharge port 33 is guided onto the stacking tray by the carry-in guide 40 and stored by the forward / reverse rotation roller 39.

  The forward / reverse roller 39 forwardly transfers the print sheet to the front end side of the stacking tray 38, and reversely rotates the back end of the sheet against the restricting member 41 disposed at the back end of the tray (right end in FIG. 2). Further, the stacking tray 38 is provided with sheet side aligning means (not shown) for aligning both side edges of the print sheets stored on the tray 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 38 and aligned in a bundle.

  The stacking tray 38 is provided with a sheet bundle thickness identifying 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]
The sheet bundle conveying means 43 for conveying the saddle stitch sheet bundle from the stacking tray 38 to the application position Px on the downstream side is configured as shown in FIG. The sheet bundle conveying means 43 is arranged in the bookbinding path 42 described above. The sheet bundle received from the stacking tray 38 in a substantially horizontal posture is turned by 90 degrees to deflect to a vertical posture and transferred to the application position Px on the downstream side. . The sheet bundle conveying means 43 is composed of a pair of fixed clamper 44a and movable clamper 44b for holding the saddle stitch sheet bundle, and a unit frame 45 equipped with these.

  The unit frame 45 is attached to an apparatus frame (not shown) so as to be rotatable by a shaft 46, and a fan-shaped gear 47 is provided on the shaft 46. By rotating the sector gear 47 by a turning motor Mf provided on the apparatus frame side, the unit frame 45 turns in the clockwise and counterclockwise directions in FIG.

  A lift rail 48 is attached to the unit frame 45 by a guide rail (not shown) so as to be movable up and down in the direction of the arrow in FIG. 7, and a rack gear 49 provided on the lift frame 48 and a pinion 50 are engaged with each other. Is connected to a lifting motor Mk. A fixed clamper 44 a is attached to the lifting frame 48, and the movable clamper 44 b is supported by a rod 51 with a bearing. The movable clamper 44b is provided with a rack gear 51r formed on a rod 51 integral with the movable clamper 44b, and a pinion 51p of a grip motor Mn provided on the lifting frame 48 is engaged.

  Therefore, when the grip motor Mn is rotated forward and backward, the movable clamper 44b approaches and separates from the fixed clamper 44a, and when the lift motor Mk is rotated forward and backward, the movable clamper 44b and the fixed clamper 44a are in the bookbinding path 42 with the sheet bundle nipped. It will move up and down. Incidentally, Sg shown in the figure is a grip sensor, which detects whether or not the movable clamper 44b grips the sheet bundle with a predetermined pressure.

  Therefore, the control means 78, which will be described later, operates the grip motor Mn to grip the sheet bundle, deflects the gripped sheet bundle from the horizontal posture to the vertical posture by the turning motor Mf, and then the sheet bundle in the vertical posture. Is transferred to the coating position Px on the downstream side along the bookbinding path 42 by the lifting motor Mk.

[Configuration of adhesive application part]
Adhesive application means 52 is disposed at the application position Px of the bookbinding path 42. As shown in FIG. 3A, the adhesive application means 52 is composed of a glue container 54 that accommodates a hot-melt adhesive, an application roll 53, and a roll rotation motor Mr. The glue container 54 is divided into a liquid adhesive storage chamber (hereinafter referred to as a liquid agent storage chamber) 54a and a solid adhesive storage chamber (hereinafter referred to as a solid agent storage chamber) 54b, and a coating roll 53 is rotatable in the liquid agent storage chamber 54a. It has been incorporated.

  A paste sensor 54S for detecting the remaining amount of adhesive is disposed in the liquid agent storage chamber 54a. The illustrated glue sensor 54S also serves as an adhesive temperature sensor, and detects the temperature of the liquefied adhesive in the liquid storage chamber 54a, 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 54 h such as an electric heater is embedded in the paste container 54.

  The glue sensor 54S and the heating means 54h are connected to a control CPU (control means) 78, which will be described later, to adjust the temperature of the adhesive in the liquid agent storage chamber 54a to a predetermined melting temperature. The coating roll 53 is made of a heat-resistant porous material, and is configured so as to impregnate the glue and swell the glue layer around the roll.

  The glue container 54 configured as described above reciprocates along the sheet bundle. FIG. 4 (a) shows a conceptual diagram thereof. The glue container 54 is formed in a short length (dimension) with respect to the lower end edge (back cover portion at the time of bookbinding) S1 of the sheet bundle, and the coating incorporated therein Along with the roll 53, it is supported on the guide rail 56 of the apparatus frame so as to move along the lower edge S1 of the sheet bundle. The glue container 54 is connected to a timing belt 57 attached to the apparatus frame, and a driving motor Md is connected to the timing belt 57.

  Therefore, the glue container 54 is reciprocated by the drive motor Md 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. 4A, and the return position RP is set based on sheet width size information.

  Further, when the apparatus is turned on (initial time), it is set to the home position Hp, and after a predetermined time from the sheet grip signal of the grip sensor Sg provided in the preceding sheet bundle conveying means 43 (sheet bundle is at the application position Px). It moves from the home position Hp toward the return position Rp at the estimated time of arrival). Simultaneously with this movement, the application roll 53 starts to rotate by the roll rotation motor Mr. Incidentally, SP shown in the figure is a home position sensor of the glue container 54.

  The adhesive application means 52 configured in this manner is rotated by the drive motor Md, and the glue container 54 starts to move along the guide rail 56 from the left side to the right side in FIG. In this forward path, the application roll 53 presses 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 sheet bundle conveying means 43 is adjusted by the lifting motor Mk.

[Configuration of cover binding means]
A cover binding means 58 is arranged at the cover binding position Py of the bookbinding path 42. The cover binding means 58 includes a back plate 59, a back folding plate 60, and a folding roll 61 as shown in FIG. At the cover binding position Py, the above cover transport path 34 is arranged, and the cover sheet is fed from the image forming apparatus A or the inserter apparatus 25.

  Therefore, the back plate 59 is composed of a plate-like member that backs up the cover sheet, and is disposed in the bookbinding path 42 so as to be able to advance and retract. A saddle stitch sheet bundle is joined to the cover sheet supported by the back plate 59 in an inverted T shape. Therefore, the back folding plate 60 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 61 is composed of a pair of rollers that press and fold the back-folded sheet bundle.

[Bundle posture deflection means]
On the downstream side of the folding roll 61, a sheet bundle feeding means 62 for positioning and setting the sheet bundle at the cutting position Pz and a cutting means 63 for cutting the peripheral edge of the sheet bundle are arranged. The illustrated sheet bundle feeding means 62 is constituted by a bundle posture deflecting means for deflecting the vertical direction of the sheet bundle. This bundle posture deflecting means (sheet bundle feeding means: the same applies hereinafter) 62 deflects the sheet bundle mounted from the cover binding position Py to a predetermined posture and feeds it to the cutting position Pz on the downstream side.

  Therefore, the bundle posture deflecting unit 62 includes grip rotating members 62 a and 62 b that grip and rotate the sheet bundle sent from the folding roll 61. As shown in FIG. 2, the grip rotation members 62a and 62b are provided on a unit frame 62x attached to the apparatus frame so as to be movable up and down. Grip rotating members 62a and 62b are rotatably supported by the unit frame 62x with the bookbinding path 42 interposed therebetween, and one movable grip rotating member 62b is in the sheet bundle thickness direction (a direction orthogonal to the bookbinding path 42). It is supported to move freely.

  The grip rotating members 62a and 62b are provided with turning motors Mt1 and Mt2 so as to deflect the posture of the sheet bundle in the bookbinding path. The movable grip rotating member 62b is equipped with a grip motor Mg that moves in the left-right direction in FIG.

  Accordingly, the sheet bundle guided into the bookbinding path 42 is gripped by the left and right grip rotation members 62a and 62b, and the orientation direction of the sheet bundle is deflected by the turning motors Mt1 and Mt2. For example, the sheet bundle having the back portion carried downward is turned 180 degrees and the small edge portion is sent downward to the downstream discharge roller 72. 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 respectively deflected downward at the downstream cutting position Pz to cut the three peripheral directions of the sheet bundle.

  The movable grip rotating member 62b is provided with a grip sensor (not shown) to detect that the sheet bundle is securely gripped between the left and right grip rotating members 62a, 62b. The rotating members 62a and 62b are configured to be driven to turn. The unit frame 62x can move the sheet bundle up and down along the bookbinding path 42 by a lifting motor Ma. This is because the sheet bundle is conveyed and set at the cutting position G and the cutting width (cut amount) at the cutting position Pz is set by the feed amount when trimming and dividing and cutting the periphery of the sheet bundle.

[Composition of cutting means]
A cutting means 63 is disposed downstream of the bundle posture deflecting means 62. As shown in FIGS. 1 and 9, the cutting unit 63 includes a cutting edge press unit 67 that presses and supports the cutting edge of the sheet bundle on the blade receiving member 64, and a cutting blade unit 68. The cutting edge press means 67 is constituted by a press mechanism that presses and holds the cutting edge of the sheet bundle against a blade receiving member 64 described later, a pressurizing member 65 that presses the sheet bundle, and a pressure applied to the pressing member 65. It is comprised by the urging means (not shown) which provides.

  The urging unit includes a spring that urges the pressing member (pressing unit) 65 in a direction orthogonal to the sheet bundle by a driving unit (not shown). The cutting blade unit 68 includes a flat blade-shaped cutting blade 70 and a cutter motor (driving means) Mc that drives the cutting blade 70. By the cutting means 63 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.

  As shown in FIG. 8, the cutting blade 70 has a flat blade shape and a blade width L0 longer than the sheet width L. The cutting blade 70 abuts the blade receiving member 64 at a standby position spaced from the blade receiving member 64 by a distance d. It is supported so as to be capable of reciprocating between the cutting position and connected to a cutter motor (driving means) Mc.

[Configuration of blade receiving member]
The blade receiving member 64 is disposed opposite to the cutting blade 70 with a sheet (bundle) interposed therebetween, and is fixed to an apparatus frame (not shown). The blade receiving member 64 includes a sheet central receiving surface 64a that supports the central portion of the sheet, a blade receiving surface 64b that receives the cutting edge of the cutting blade 70, and a cutting edge receiving surface 64c. Each receiving surface is configured to be continuous with each other to form the same plane. Therefore, the sheet center receiving surface 64a positioned above the cutting position Pz and the cutting edge receiving surface 64c positioned below the cutting position Pz are made of a conductive material, and receive the cutting edge of the cutting blade 70 at the cutting position Pz. The surface 64b is made of a non-conductive material.

  The above-described blade receiving member 64 is selected, for example, as follows. First, an optimum material for the cutting blade is selected as the blade receiving surface 64b. The blade receiving surface 64b is made of a material that has a hardness that does not damage the cutting edge of the cutting blade during cutting, and an elasticity that does not bite the cut paper piece when the cutting blade strikes and cuts. It is composed. Therefore, the blade receiving surface 64b is made of a non-conductive material.

  On the other hand, the sheet center receiving surface 64a and the cutting edge receiving surface 64c are made of a material having appropriate rigidity and conductivity. The sheet center receiving surface 64a, the cutting edge receiving surface 64c, and the blade receiving surface 64b may be formed of different members, but are inexpensive when manufactured by the same material and by the same molding.

  Therefore, in the illustrated example, a plate-like member is formed by two-color molding of synthetic resin, the blade receiving surface 64b is formed to be non-conductive, and the sheet center receiving surface 64a and the cutting edge receiving surface 64c are formed to be conductive. To do. For example, the blade receiving member 64 is formed by molding a synthetic resin material such as polypropylene resin. At this time, a two-color molding method is used in which conductive powder such as tin is mixed into the sheet center receiving surface 64a and the cutting edge receiving surface 64c.

  Then, the blade receiving member 64 molded into one plate-like member has its blade receiving surface 64b formed of only polypropylene resin, and the sheet center receiving surface 64a and the cutting edge receiving surface 64c are mixed with metal powder such as tin. It will be conductive. In addition, this electroconductive powder is mixed so that it may have electroconductivity (so that electroconductive powder may chain). The sheet center receiving surface 64a and the cutting edge receiving surface 64c are grounded.

[Configuration of recessed grooves]
In the illustrated sheet bundle, as described above, the back binding edge bulges out due to the case binding on the cover sheet. For this reason, at least one of the blade receiving member 64 and the pressure member 65 described above is formed with a recessed groove 66 at a position that supports the back binding edge of the sheet bundle, and the back binding end of the sheet bundle is formed in the recessed groove 66. The edges are immersive.

  In other words, the blade receiving member 64 and the pressure member 65 that sandwich and support the sheet bundle at the cutting position Pz are provided with a recessed groove 66 that fits the back edge (shoulder) of the sheet bundle on both or one of them. Yes. One or more recessed grooves 66 are formed on the left and right sides of the sheet bundle according to the sheet size. In the apparatus shown in FIG. 8, the pressing member 65 is formed with two recessed grooves 66 on the left and right, respectively, for a total of four locations.

  The blade receiving member 64 that backs up and supports the sheet bundle to be cut facing the cutting blade 70 is electrically connected to the sheet center receiving surface 64a that supports the sheet central portion and the cutting edge receiving surface 64c that supports the edge of the sheet to be cut. Therefore, when the sheet bundle supported at the cutting position Pz is cut by the cutting blade 70, the two receiving surfaces act as follows.

  As shown in FIG. 9B, the cut piece of paper scrap falls by its own weight and is stored in the waste box 73. At this time, since the cutting edge receiving surface 64c is made of a conductive material, it is not charged with static electricity. Accordingly, the paper scrap falls by its own weight along the cutting edge receiving surface 64c and does not electrostatically adhere to this surface.

[Output structure]
A paper discharge roller (paper discharge means) 72 and a storage stacker 74 are disposed downstream of the cutting position Pz. As shown in FIG. 2, the storage stacker 74 stores the sheet bundle in a standing posture. As shown in FIG. 1, the storage stacker 74 is arranged in a drawer shape on the casing 29 and can be pulled out to the front side of the apparatus (front side in FIG. 1). The user can visually recognize from the upper surface direction in a state of being pulled out to the front side of the apparatus. Incidentally, 74Sf shown in the figure is a fullness detection sensor, which detects the full state of the sheet bundle stored in the storage stacker 74 and warns the operator of the removal.

  Therefore, the control of the adhesive application unit 52 and the cutting unit 63 by the control unit 78 will be described. The control means 78 sets the adhesive application means 52 as follows so that “the adhesive is not applied to the cut region Lc of the saddle stitch sheet bundle set by the cutting amount setting means 71 described later or the application amount is reduced”. To control.

[First Embodiment of Control Unit]
As shown in FIG. 4, the application roll 53 applies the adhesive in the process of reciprocating from one end Sn1 to the other end Sn2 of the saddle stitch sheet bundle supported at the application position Px by the sheet bundle conveying means 43. At this time, the application roll 53 rolls the lower edge S1 of the sheet bundle in the forward path and applies the adhesive in the return path. Therefore, the control means 78 controls the movement stroke of the application roll 53 as follows.

  The control means 78, which will be described later in this embodiment, positions the coating roll 53 (in the figure, integrated with the glue container 54) 53 at the home position Hp when the apparatus is activated. Then, the control means 78 moves the coating roll 53 to the standby position Wp by the timing signal when the saddle stitch sheets are aligned on the stacking tray 38 of the bookbinding apparatus B. The standby position Wp is determined by the size information of the saddle stitch sheet from the image forming apparatus A, and is set outside the sheet size Ls of the saddle stitch sheet (see FIG. 4A).

  Therefore, the control means 78 moves the position of the application roll 53 from the standby position Wp to the application start position Ap1 based on the cut area Lc set by the cutting amount setting means 71 described later. Then, it reciprocates between the application start position Ap1 and the application end position Ap2. At this time, the application start position Ap1 is set to a position where a cut area Lc1 of the top (for example, top) is formed on the inner side from the left end edge Sn1 of the saddle stitch sheet bundle. Similarly, the application end position Ap2 is set to a position where a cut area Lc2 of the top and bottom (for example, the base) is formed inside the right end edge Sn2 of the saddle stitch sheet bundle.

  Therefore, the control means 78 reciprocates the application roll 53 between the application start position Ap1 and the application end position Ap2. In this case, the sheet bundle is separated on the outward path of the application roll 53 and the adhesive is applied to the edge of the sheet bundle on the return path, or the adhesive is applied to the edge of the sheet bundle on either the outward path or the return path of the application roll 53. To do. Then, a coating gap Ga is set between the sheet edge and the coating roll 53 as shown in FIG. 4B. This gap Ga is an interval at which the adhesive impregnated on the roll surface is applied to the sheet end surface. Is set to

  As described above, the control unit 78 sets the movement stroke of the coating roll 53 based on the size information of the saddle stitch sheet bundle and the cut area information from the cutting amount setting unit 71, thereby bonding only to the back binding region on the end face of the saddle stitch sheet bundle. The moving region of the coating roll 53 is controlled so that the agent is applied and the adhesive is not applied to the cut regions Lc1 and Lc2.

[Second Embodiment of Control Unit]
Next, different modes of the control means 78 will be described with reference to FIGS. As in the previous embodiment, the application roll 53 is positioned at the home position Hp when the apparatus is activated, and the application roll 53 is moved to the standby position Wp in response to a timing signal in which the saddle stitch sheets are aligned on the stacking tray 38.

  Accordingly, the control means 78 conveys and sets the saddle stitch sheet bundle to the application position Px by the sheet bundle conveyance means 43, and the application roll 53 is changed from the standby position Wp to the return position Rp by a signal that the cover sheet is set to the cover sheet binding position Py. Reciprocates between. The return position Rp is determined by the size information of the saddle stitch sheets, and is set outside the sheet size Ls of the saddle stitch sheet bundle (see FIG. 5A).

  In this embodiment, the control unit 78 controls the sheet bundle conveying unit 43 as follows. The sheet bundle conveying means 43 conveys and sets the saddle stitch sheet bundle to the application position Px so as to form the application gap Ga between the sheet bundle edge and the application roll 53 as described above. Therefore, the control means 78 sets the application start position Ap1 and the application end position Ap2 based on the cut region Lc set by the cutting amount setting means 71 described later.

  In this case, the application start position Ap1 is formed with a cut area Lc1 of the top portion (for example, the top portion) inside the left end edge Sn1 of the saddle stitch sheet bundle, and similarly, the application end position Ap2 is determined from the right end edge Sn2 of the saddle stitch sheet bundle. It is set to a position where a cut area Lc2 of the top and bottom part (for example, the ground part) is formed inside.

  Then, the control means 78 sets the gap Ga2 between the sheet edge and the roll surface between the standby position Wp and the application start position Ap1 to an interval at which the adhesive is not applied to the sheet end, and the application start position Ap1 and the application end. A predetermined gap (gap) Ga1 for applying the adhesive to the sheet edge is set between the position Ap2. This application gap adjustment controls, for example, the sheet bundle conveying means 43 or the height position of the application roll 53.

  Further, the control means 78 sets an interval at which the adhesive is not applied to the sheet edge between the application end position Ap2 and the return position Rp. That is, assuming that Ga0 is a gap where the adhesive layer impregnated on the surface of the application roll 53 can be applied, Ga2> Ga0> Ga1 is set (see FIG. 5B).

  In this way, the control means 78 adjusts the application gap Ga between the application roll 53 and the sheet end face with the size information of the saddle stitch sheet bundle and the cut area information from the cutting amount setting means 71 to thereby adjust the end face of the saddle stitch sheet bundle. The application gap is controlled so that the adhesive is applied only to the back binding area of the sheet and the adhesive is not applied to the cut area Lc.

[Third embodiment of control means]
The form shown in FIG. 6 is based on the premise that an application amount adjusting blade 55 is provided in the adhesive application means 71 described above. The coating amount adjusting blade 55 will be described. As shown in FIG. 6, the glue container 54 is provided with a coating roll 53 and a blade 55 for making the adhesive layer applied with this roll uniform.

  The coating amount adjusting blade 55 is formed with a gap between the sheet end surface and substantially equal intervals with the coating cap Ga between the roll surface and the sheet end surface. Then, the coating amount adjusting blade 55 has a peeling posture (FIG. 6 solid line (a) in FIG. 6) in which the gap between the coating posture substantially the same as the coating gap Ga (broken line in FIG. 6A) and the sheet end surface is substantially zero. ) Is connected to an operating solenoid (not shown) so as to be movable in position.

  Therefore, the control means 78 sets the application start position Ap1 and the application end position Ap2 based on the cut area Lc set by the cutting amount setting means 71, which will be described later, as described above. Then, while the application roll 53 moves from the standby position Wp to the application start position Ap1, the application amount adjustment blade 55 is held in the peeling posture, and the application roll 53 peels the adhesive layer applied to the sheet end surface.

  When the application roll 53 moves from the application start position Ap1 to the application end position Ap2, the application amount adjustment blade 55 is held in the application posture, and the adhesive layer applied to the sheet end surface by the application roll 53 is made uniform to a predetermined thickness. . When the application roll 53 moves from the application end position Ap2 to the return position Rp, the application amount adjustment blade 55 is held in the peeling posture, and the adhesive layer applied to the sheet end surface by the application roll 53 is shown in FIG. Scrape as shown.

  With this configuration, the control unit 78 reduces the adhesive layer applied to the sheet end surface with the application roll 53 based on the size information of the saddle stitch sheet bundle and the cut region information from the cutting amount setting unit 71 in the cut region. It will be.

[Cutting amount setting means]
The cutting amount setting means 71 will be described. As shown in FIG. 10A, a sheet bundle that is bound and bound on a cover sheet has a top portion cut by a cut amount Lc1, a ground portion cut by a cut amount Lc2, and a fore edge cut. Trimming is cut by the amount Lc3. At this time, the cut amounts of the top and bottom portions are calculated as follows, or the cut amounts are set based on the data calculated by the operator and input from the control panel 18.

  First, the top and bottom cut amounts (Lc1, Lc2) are calculated from the vertical size of the cover sheet and the vertical size of the saddle stitch sheet, based on whichever is shorter. Then, the shorter sheet (hereinafter referred to as a short sheet or a long sheet) is calculated from the longitudinal length Lt and the minimum cut amount Lx. That is, [Lc1 = Lc2 = {(vertical length of long sheet) − (vertical length of short sheet)} / 2 + minimum cut amount Lx]. The minimum cut amount Lx is a cut width for aligning the edges of the sheet bundle, and is set to be large when the sheets have variations.

  Next, the cut amount (Lc3) of the fore edge is calculated as follows. First, the bundle thickness of the saddle stitch sheet bundle is subtracted from the lateral length of the cover sheet and divided into two, and the length is calculated based on the shorter one of the length and the lateral length Ly of the saddle stitch sheet. That is, the minimum cut amount Ly is added to the shorter length of [{(cover sheet horizontal length Ly) − (bundle thickness)} / 2] and the horizontal length Ly of the saddle stitch sheet. Thereby, the cut area Lc3 of the fore edge is calculated.

[Configuration of control means]
Next, the structure 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 as shown in FIG. 1 are connected, for example, the control CPU 75 provided in the image forming apparatus A has a control panel 18 and mode setting means. 76 is provided. A control CPU 78 is provided in the control unit of the bookbinding apparatus B. The control CPU 78 calls a bookbinding process execution program from the ROM 79 and executes each process in the bookbinding path 42.

  The control CPU 78 also receives a post-processing mode instruction signal, job end signal, sheet size information, and other information required for bookbinding and a command signal from the control CPU 75 of the image forming apparatus A. On the other hand, sheet sensors Se1 to Se5 for detecting a sheet (sheet bundle) to be conveyed are arranged at positions shown in FIG.

  Therefore, the detection signal of each of the sheet sensors Se1 to Se5 is transmitted to the control CPU 75, and the control CPU 78 performs “stacking unit control unit 78a” “adhesive application unit control unit 78b” “cover binding unit control unit 78c” “cutting unit control unit”. 78d "and" stack controller 78e ".

[Adhesive application operation control]
The adhesive application means controller 78b is configured to execute the following operation. In other words, the control CPU 78 performs “initial operation” “saddle binding sheet bundle stacking” “saddle binding sheet bundle application position transfer” “cover sheet feeding set” “adhesive application operation” “adhesive cooling” “cover binding operation” “cutting” Position transfer "," trimming cut operation ", and" paper discharge operation "are executed in this order.

  “Initial operation” executes an initialization operation when the apparatus power is turned on. At this time, the application roller 53 is positioned at the home position Hp. Next, the control CPU 78 acquires the bookbinding processing mode and the size information of the saddle stitch sheet and the cover sheet from the image forming apparatus A. Then, the sheets sent from the image forming apparatus A in response to the job start signal are accommodated in the stacking tray 38 and aligned. Thereafter, upon receiving a job end signal from the image forming apparatus A, the sheet bundle aligned on the stacking tray 38 is transferred to the application position Px by the sheet bundle conveying means 43. The cover sheet is fed and set to the cover binding position Py from the cover transport path 34 before and after the sheet bundle transfer.

  Therefore, the control means (control CPU) 78 applies an adhesive to the saddle stitch sheet bundle. The saddle stitch sheet bundle to which this adhesive is applied is fed to the cover sheet binding position Py and bound to the cover sheet. The control CPU 78 waits for a predetermined adhesive cooling time after the cover binding operation. After this adhesive cooling, the sheet bundle conveying means 43 transfers the cover binding sheet bundle to the cutting position Pz. Then, the posture is deflected by the bundle posture deflecting unit 62 to cut the three directions of the sheet bundle.

  In the bookbinding and binding process, the cutting amount calculation unit 71 calculates the cutting amount from the size information and the bundle thickness information sent from the image forming apparatus A. This cutting amount is set by betting the top portion cutting amount Lc1, the ground portion cutting amount Lc2, and the fore edge cutting amount Lc3 of the sheet bundle. Therefore, the control CPU 78 cuts the cutting operation by the cutting means 63 in the order of the top portion, the ground portion, and then the fore edge portion, or in the order of the ground portion, the top portion, and then the fore edge portion.

  That is, the bound sheet bundle is cut in the order of the top portion and then the fore edge portion. This is because the adhesive is not applied to a part (cutting region) of the saddle stitch sheet bundle, or the amount of the application is reduced, so that the sheet of this part tends to curl with time. Therefore, the effect of this curl is reduced by cutting the top and bottom first.

  In order to reduce the influence of this curl, when the cut areas Lc1 and Lc2 are large and / or when the basis weight of the sheets constituting the saddle stitch sheet bundle is large, the above-described adhesive cooling time is set short. As described above, the curling amount generated in the saddle stitch sheet bundle is reduced by shortening the processing time for cutting at least one of the top portion and the ground portion of the sheet bundle, thereby solving the problem of paper folding. At the same time, the processing efficiency can be improved by shortening the adhesive cooling time.

[Configuration of post-processing equipment]
The bookbinding apparatus B is provided with a post-processing apparatus C. The post-processing apparatus C is provided with a post-processing path 38 connected to the cover sheet transport path 34. The post-processing path 38 includes a staple unit, a punch unit, and a stamp unit. Post-processing devices such as these are arranged, and a print sheet from the image forming apparatus A is received via the cover sheet conveyance path 34, and the print sheet is subjected to a stapling process, a punching process, and a marking process, and is carried out to the paper discharge tray 24. Further, the sheet from the image forming apparatus A that is not subjected to such post-processing is stored in the paper discharge tray 24.

A image forming apparatus B bookbinding apparatus 38 stacking tray 42 bookbinding path 43 sheet bundle conveying means 52 adhesive application means 53 application roll 54 glue container 55 adjusting blade Mr roll rotation motor Md drive motor 58 cover binding means 62 bundle posture deflection means (sheet) Bundle feeding means)
63 Cutting means 64 Blade receiving member 65 Pressure member 70 Cutting blade Mc Cutter motor 71 Cutting amount setting means 72 Paper discharge roller (paper discharge means)
73 Waste box 74 Storage stacker 78 Control means Px Application position Py Cover binding position Pz Cutting position Lc Cut area

Claims (10)

A bookbinding device that trims and aligns the periphery after binding a bundle of sheets that have been aligned,
A bookbinding path having sheet bundle conveying means for transferring the sheet bundle in the order of application position and cutting position;
An adhesive application means arranged at the application position to apply an adhesive to the back of the sheet bundle;
A cutting means arranged at the cutting position for cutting at least the top portion or the ground portion of the sheet bundle;
Control means for controlling the sheet bundle conveying means, the adhesive applying means, and the cutting means;
With
The control means includes
A cutting amount setting means for setting a cut area of the top part or the ground part from the size information of the sheet bundle aligned and the bundle thickness information is provided,
When the adhesive is applied to the back of the sheet bundle by the adhesive application unit, the control unit does not apply the adhesive to the cut area set by the cutting amount setting unit or reduces the application amount. A bookbinding apparatus for controlling the means. In the bookbinding path, a cover binding position is set between the application position and the cutting position,
The bookbinding apparatus according to claim 1, wherein a cover sheet supply path is continuously provided at the cover binding position. The cutting amount setting means is configured to calculate a cut area of the bound sheet bundle from the size information of the sheet bundle, the bundle thickness information, and the cover sheet size information. The bookbinding apparatus according to claim 2. The adhesive application means includes
An application roller that moves from one end to the other end of the sheet bundle supported by the sheet bundle conveying means;
It is composed of an adhesive container for supplying an adhesive to this application roller,
The control means includes
The movement stroke of the application roller,
The application gap between the application roller and the end face of the sheet bundle,
An application amount adjusting blade for adjusting the thickness of the adhesive layer applied by the application roller, or
The bookbinding apparatus according to claim 1, wherein the adhesive is not applied to the cut region of the sheet bundle or the application amount is reduced by any of the methods. The control means includes
5. The moving stroke of the coating roller is controlled so that an adhesive is applied only to a back binding area of the sheet bundle held at the application position, and no adhesive is applied to the cut area. The bookbinding apparatus described. The adhesive application means includes
An application amount adjusting blade for adjusting the thickness of the adhesive layer applied to the back of the sheet bundle by moving the position with the application roller;
The control means includes
The bookbinding apparatus according to claim 4, wherein the coating thickness is reduced by scraping off the adhesive applied to the cut region with the coating amount adjusting blade. The sheet bundle conveying means is configured to support the sheet bundle so as to form a predetermined application gap between the application roller and the application roller, and to adjust the application gap.
The bookbinding apparatus according to claim 4, wherein the control unit reduces the amount of adhesive applied to the cut region of the sheet bundle by adjusting the application gap. In the bookbinding path, a bundle posture deflecting unit that deflects the posture of the sheet bundle is disposed upstream of the cutting position.
The control means includes
Controlling the cutting means and the bundle posture deflecting means so as to trim and cut the three directions of the sheet bundle at the cutting position;
The bookbinding apparatus according to claim 1, wherein after cutting the top portion and the ground portion of the sheet bundle, the fore edge portion is cut. The control means controls the cutting means and the bundle posture deflecting means when the cut area is large and / or when the basis weight of the sheets constituting the sheet bundle is large, the sheet bundle is in the cutting position. The bookbinding apparatus according to claim 7, wherein the cutting unit is configured to reduce a processing time for cutting at least one of the top portion and the ground portion of the sheet bundle after being transferred to the sheet. An image forming apparatus for sequentially forming images on sheets;
A bookbinding apparatus that performs bookbinding processing by aligning sheets from the image forming apparatus in a bundle;
Consisting of
An image forming system comprising the bookbinding apparatus according to any one of claims 1 to 7.

Images