JP2011131497A - Bookbinding apparatus and image forming system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid scattering of cutting waste pieces of papers by coating a sheet end edge in a cutting area with an adhesive, binding it in the same way as a back binding end face, and then performing cut finishing process. <P>SOLUTION: When at least edge parts are cut and arranged after the end face of a bundle of sheets is coated with an adhesive, a cutting area set by a cut amount computing means for computing the cut margins of the edge parts is coated with the adhesive and then, the edge parts are cut-processed. A bookbinding apparatus includes: an adhesive applying means for applying the adhesive on the end face of the bundle of the sheets; a cutting means for cutting the edge parts of the bundle of the sheets; and a control means for controlling the adhesive applying means and the cutting means. In the control means, the cut amount computing means for computing the cutting area of the edge parts of the bundle of the sheets is provided, and after the cutting area of the edge parts set by the cut amount computing means is coated with the adhesive, the edge parts are cut-processed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bookbinding apparatus that aligns sheets formed with an image forming apparatus or the like, and applies an adhesive to the back of the sheet bundle and binds the sheets together, and trims and aligns the edge of the bound sheet bundle. The present invention relates to an improvement of a cutting mechanism in which waste paper pieces are not scattered.

  In general, this type of bookbinding apparatus is used as a terminal device of an image forming system such as a printer or a printing machine, and after stacking image-formed sheets in the order of pages and aligning them in a bundle, the edges are glued and bound to a cover sheet. It is widely known as an automatic bookbinding system to be combined, or a bookbinding apparatus that aligns and binds print sheets supplied from a paper feed port.

  And as this bookbinding binding, there is known a method of case binding with a top-sheet binding and a cover sheet that are bound together by applying an adhesive to the back end surface of the sheet bundle that has been gathered together. Devices that trim the direction are also known.

  Conventionally, for example, Patent Document 1 discloses an apparatus in which sheets fed from an image forming apparatus are stacked and stacked on a stacking tray, an adhesive is applied to the back end face, and the sheet bundle is bound and bound with a cover sheet. Yes. In addition, an apparatus has been proposed in which, after case binding, a sheet bundle is transferred to a cutting unit and the three directions are cut and finished.

  In such an apparatus, the sheet bundle that is collected and collected in the bookbinding processing path is transferred in the order of application position, binding position, and cutting position, and in the process, adhesive application processing, binding processing, and cutting processing are sequentially executed. It is configured. At this cutting position, a bundle posture deflection unit that deflects the posture of the sheet bundle and a cutting unit are arranged to cut the three directions while deflecting the posture of the sheet bundle. Below this cutting unit, there are disposed a waste box for storing cutting paper pieces (waste paper pieces) and a stacker for storing bookbinding finished sheet bundles. The waste paper pieces generated at the cutting position are stored in the waste box, and the bookbinding sheets are stored. It is comprised so that it may accommodate in a stacker.

  Conventionally, as disclosed in, for example, Patent Document 1, an adhesive is uniformly applied to the back-bound end surface of the sheet bundle, and then bound to the cover sheet, and then is aligned in one direction on the end surface of the fore edge or on the top. The three directions of the part, the ground part, and the edge part are cut and finished.

JP 2007-76119 A

  After applying the adhesive to the back end face of the sheet bundle that has been gathered together as described above and binding them together, cut or align the edges (one-way cutting), or remove the top, ground, and edge. An apparatus for trimming (three-way trimming) is widely known.

  In this case, conventionally, an operator selects whether the edge of the fore edge is cut in one direction or in three directions after the adhesive is uniformly applied to the end face and bound. For this reason, the waste paper pieces generated when cutting the edge portion are dropped and accommodated in the waste box in a strip-like state. Accordingly, when the cutting allowance is small, when the paper piece is charged with static electricity, or when cooling air is flowing in the apparatus, the paper piece waste may be scattered without falling into the waste box.

  Such scattering of paper scraps may be partly infiltrated into the bookbinding sheet bundle and fouled, and when scattered in the apparatus, it burns in the heating part (for example, the heating and melting part of the adhesive) and causes an accident. There is a risk of inviting.

  Therefore, when applying the adhesive to the sheet bundle, the inventor applies the adhesive to the end surface of the cutting edge (cutting area) of the edge of the edge of the small edge portion in the same manner as the back binding portion, so that the cutting waste becomes a lump. The idea was that it could be securely stored in the waste box without scattering.

  In the present invention, when cutting and aligning a bound bundle of bound sheets, an adhesive is applied to the edge of the sheet in the cutting area and bound in the same manner as the back-bound end surface, and then cut and finished, and then cut and finished. An object of the present invention is to provide a bookbinding apparatus that does not scatter.

  In order to achieve the above object, the present invention provides a cutting area set by a cutting amount calculating means for calculating a cutting margin of the fore edge when at least aligning the fore edge after applying an adhesive to the end face of the sheet bundle. It is characterized in that the fore edge is cut after the adhesive is applied.

  Further, the configuration will be described in detail. This is a bookbinding device that binds the sheet bundle and cuts and aligns at least the fore edge (Sk), and transfers the sheet bundle in the order of the adhesive application position (Y) and the cutting position (Z). The bookbinding path (P5), the adhesive application means (49) that is disposed at the adhesive application position and applies the adhesive to the end surface of the sheet bundle, and the small edge portion of the sheet bundle that is disposed at the cutting position. A cutting unit (G) for cutting, and a control unit (80) for controlling the adhesive application unit and the cutting unit, wherein the control unit calculates a cutting area of a fore edge portion of the sheet bundle. A calculating means (86) is provided, and the fore edge is cut after the adhesive is applied to the fore edge cutting area (KAr) set by the cutting amount calculating means.

  Since the present invention is configured to cut the fore edge after applying the adhesive to the cutting area set by the cutting amount calculating means for calculating the cutting margin of the fore edge, the following effects can be obtained. .

  When trimming the edge, at least a part of the cutting area is bound with adhesive, so the scrap paper pieces fall into a lump with one end bound with adhesive and are stored in the waste box. Will be. Therefore, when the fore edge is cut, the scrap paper pieces are not scattered in a strip shape, so that the waste paper pieces may remain on the blade receiving surface of the cutting blade and remain attached to the cutting blade due to static electricity. In addition, there is no fear that the inside of the apparatus will be scattered by cooling air.

  At the same time, the waste paper pieces do not need to be separated and disposed of the paper pieces containing the adhesive and the paper pieces not containing the adhesive. Furthermore, according to the present invention, it is possible to reduce the cutting load due to the adhesive by reducing the amount of application on the end surface of the fore edge when applying the adhesive to the back end surface and the end surface of the fore edge.

1 is an overall explanatory diagram of an image forming system according to the present invention. FIG. 3 is an explanatory diagram of a bookbinding binding processing unit of the bookbinding apparatus in the system of FIG. 1. FIG. 3 is an explanatory diagram of a cutting finish unit of the bookbinding apparatus in the system of FIG. 1. FIG. 3 is an explanatory diagram of a bundle transport unit in the bookbinding apparatus of FIG. 2. It is explanatory drawing of the adhesive agent coating unit in the bookbinding apparatus of FIG. 2, (a) shows the structure of an application | coating roll, (b) shows an application | coating operation state. FIG. 3 is an explanatory diagram for calculating a cutting amount in the bookbinding apparatus of FIG. 2, wherein (a) shows a cutting state and (b) to (d) show a trimming region setting method. Explanatory drawing of the control structure in the system of FIG. FIGS. 3A and 3B are diagrams illustrating operation states in the bookbinding apparatus of FIG. 2, in which FIG. 2A illustrates a state in which a sheet bundle is transferred to an attitude deflection unit, and FIG. FIGS. 3A and 3B are explanatory diagrams illustrating an operation state in the bookbinding apparatus of FIG. 2, in which FIG. 2A illustrates a state in which an adhesive is applied to the end surface of the edge of the sheet bundle, and FIG. 2B illustrates a posture of the sheet bundle in which the adhesive is applied to the edge. Indicates the state to be performed. FIGS. 3A and 3B are diagrams illustrating operation states in the bookbinding apparatus of FIG. 2, in which FIG. 2A illustrates a state in which an adhesive is applied to a spine end surface of a sheet bundle, and FIG. FIGS. 3A and 3B are diagrams illustrating operation states in the bookbinding apparatus of FIG. 2, in which FIG. 2A illustrates a state in which a sheet bundle is bound and bound with a cover sheet, and FIG. FIGS. 3A and 3B are operation state explanatory diagrams of the bookbinding apparatus of FIG. 2, in which FIG. 2A illustrates a rotating state of a sheet bundle, and FIG.

[Image forming system]
An image forming system according to the present invention is shown in FIG. 1, and the present invention will be described in detail below based on the illustrated embodiment. An image forming apparatus A shown in FIG. 1 is connected to a computer, a word processor, a network, and the like, and prints a series of documents on a sheet and carries them out from a paper discharge port 9. As this printing means, laser, ink jet, offset printing or the like can be employed.

  The illustrated one is a printing drum (electrostatic drum) 10, a paper feed cassette 2 for supplying sheets to the printing drum 10, a print head 8 such as a laser for forming a latent image on the surface of the printing drum 10, and a developing device. 4 and a fixing device 5. A sheet of a predetermined size is fed from the sheet feeding cassette 2 to the sheet feeding path 3, and the printing drum 10 is disposed in the sheet feeding path 3. Then, an electrostatic latent image is formed on the drum surface by the print head 8, and toner ink is attached to the latent image by the developing device 4. After the toner image is transferred onto the sheet, it is fixed by the fixing device 5 and discharged from the paper discharge port 9.

  6 shows a duplex path in which a sheet on which an image is printed on one side is reversed in the reverse path, and is again guided to the printing drum 10 and printed on the back side of the sheet. An image reading apparatus 11 shown in FIG. 1 includes a platen on which an original sheet is set, a scanning carriage that reciprocates along the platen, and a photoelectric conversion element such as a CCD that photoelectrically converts an original image scanned by the carriage. Yes.

  Reference numeral 12 denotes a document supply / delivery device, which is composed of a paper feed tray on which a document sheet is set, a paper discharge tray, and a conveyance path for feeding a document from the paper feed tray to the paper discharge tray through the platen. Yes. The document data read by the image reading device 11 is transferred to the data storage unit of the print head 8. On the other hand, the data storage unit is connected to an external device such as a computer or a word processor, and receives document data from the external device.

[Bookbinding device]
As shown in FIG. 1, the bookbinding apparatus B collects and stacks the sheets transported to the paper discharge port 9 of the image forming apparatus A and applies an adhesive to the back binding end surface of the sheet bundle (medium paper sheet). Then, the sheets are bound together (sheet binding), or a cover sheet is supplied to the binding position, and a bundle of intermediate sheets is bound and bound with the cover sheet. The illustrated apparatus shows case binding, and the present invention will be described below for this case binding.

  A bookbinding apparatus B shown in FIG. 1 has a sheet stacking unit (stacking tray) 22 in which sheets from the image forming apparatus A are stacked in the vertical order in the order of pages, and a sheet bundle is routed from the sheet stacking unit 22 to a bookbinding path P5. The sheet bundle conveying means 30 for transferring the sheet bundle and an adhesive application that is disposed at an adhesive application position (hereinafter referred to as “application position”) Y of the bookbinding path P5 and applies an adhesive to the back binding end surface Sx of the sheet bundle. Means 49, a cover sheet feeding path P4 for feeding and setting a cover sheet at a binding position X disposed downstream of the application position Y, and a back fold for binding the cover sheet and the sheet bundle disposed at the binding position X. The press member 65, the backing member 64, a cutting means 60 that cuts the periphery of the bound sheet bundle disposed at the cutting position Z, and a storage stacker 71 that stores the cut and finished sheet bundle. To have. Each configuration will be described below.

[Configuration of sheet stacking unit]
In the bookbinding apparatus B, a sheet carry-in path P1 is provided in the apparatus housing 13, and an accumulation tray 22 for arranging and collecting sheets sequentially fed to the carry-in path P1 is disposed. As shown in FIG. 2, the stacking tray 22 is disposed on the downstream side of the sheet delivery path P1 with a step formed at the sheet discharge port 20 thereof. A paper discharge roller 21 and a sheet sensor Se are provided at the paper discharge port 20.

  The stacking tray 22 is provided with an alignment roller 24 and a trailing edge regulating member 23 for regulating the position of the trailing edge of the sheet. The alignment roller 24 transports the leading edge of the sheet that has entered the stacking tray from the paper discharge port 20 in the paper discharge direction (left direction in FIG. 2), and the reverse direction (right direction in FIG. 2) after the trailing edge of the sheet has entered the tray. ) And the rear end of the sheet is abutted and aligned with the rear end regulating member 23. For this reason, the alignment roller 24 is connected to a drive motor M2 capable of forward and reverse rotation.

  The stacking tray 22 is provided with alignment means (not shown) for aligning the width direction posture of the sheets. This aligning means, for example, arranges a pair of left and right aligning plates on the tray so as to be movable in the width direction so that the sheets are width-shifted by one side reference or center reference, and at least one of the aligning plates is reciprocated by a drive motor or the like. To be configured.

  The above-described stacking tray 22 may be fixed to the apparatus frame, but the illustrated tray is attached to the apparatus frame so as to be movable up and down between the loading position and the unloading position in FIG. The rack gear 28 provided on the stacking tray side is engaged with a pinion 27 connected to the tray lifting / lowering motor M4, and the stacking tray 22 is loaded in the loading position (solid line in FIG. 2) and unloading position (see FIG. 2) by forward / reverse rotation of the tray lifting / lowering motor M4. It moves up and down between the broken lines).

  Accordingly, the sheets stacked on the stacking tray 22 are configured to move downward from the stacking position in the direction of arrow a, and then transport in the direction of arrow b to be transferred to the subsequent sheet bundle conveying means 30.

[Sheet bundle thickness detection means]
The stacking tray 22 is provided with sheet bundle thickness detecting means St for detecting the thickness of the stacked sheet bundle. Although this detection means is not shown, for example, a slidac sensor detects the position of the gripper that holds the sheets on the stacking tray, and detects the thickness of the sheet bundle from the resistance value.

  In this way, the sheet bundle thickness detecting means St detects the thickness of the sheet bundle stacked on the stacking tray 22, and (1) the application gap between the adhesive application roll and the sheet bundle, which will be described later, is determined as the thickness of the sheet bundle. Set accordingly. (2) The cover sheet setting position and its feed amount are adjusted according to the thickness of the sheet bundle so that the sheet bundle coincides with the center of the cover sheet. (3) A standby position of a back folding press means to be described later is adjusted according to the thickness of the sheet bundle. Used for subsequent processing control.

  The above-described sheet bundle thickness detecting means St counts the number of sheets by, for example, the sheet sensor Se of the sheet discharge port 20 and multiplies the sheets by using the sheet thickness of the sheets to be used or the average sheet thickness. It is also possible to detect the thickness of the sheet bundle.

[Bookbinding route]
A bookbinding path P <b> 5 for bookbinding a bundle of sheets that have been aligned and stacked is disposed on the downstream side of the stacking tray 22. In the drawing, the above-described sheet carry-in path P1 is arranged in a direction that crosses the apparatus housing 13 in the horizontal direction, and the bookbinding path P5 is arranged in a direction that cuts the apparatus housing 13 in the vertical direction. Accordingly, the sheet carry-in path P1 and the cover sheet feeding path P4 connected thereto cross in the horizontal direction, and the bookbinding path P5 intersects with each other in the vertical direction. A binding position X is set at the intersection, and an application position Y is set at the upstream side.

[Sheet conveying means]
The bookbinding path P5 is provided with a sheet bundle conveying means 30 for conveying the intermediate sheet bundle toward the application position Y and the binding position X. The sheet bundle conveying means 30 is composed of the unit shown in FIG. This sheet bundle conveying means 30 is arranged in the bookbinding path P5 as shown in FIG. 1, and the sheet bundle received from the stacking tray 22 in a substantially horizontal posture is rotated 90 degrees and deflected to a vertical posture, and then the downstream coating is applied. Transfer to position Y.

  For this reason, the sheet bundle conveying means 30 is composed of a pair of grip members 33a and 33b for holding the sheet bundle and a unit frame 32 provided with both grip members 33a and 33b. The unit frame 32 is rotatably supported on a device frame (not shown) by a shaft 31, and a fan-shaped gear 35 provided on the shaft 31 is rotationally driven by a turning motor M5 provided on the device frame side to rotate the unit frame 32. Is swung in the clockwise direction in FIG. 4 and in the counterclockwise direction (indicated by the arrow in FIG. 4).

  A guide rail (rod) 36a (a part of which is shown in FIG. 4) is provided on the unit frame 32 pivotally supported on the apparatus frame in this way, and the movable frame 36 is vertically moved along the guide rail 36a. It is fitted and supported so as to be movable in the direction of the arrow in FIG. The movable frame 36 is provided with a rack gear 42 and meshes with the pinion 41 of the lifting motor M7. Accordingly, the movable frame 36 moves up and down in the direction of the arrow in the figure by the rotation of the lifting motor M7.

  A pair of grip members 33a and 33b are attached to the movable frame 36 as follows. The grip member 33b on the fixed side is fixed to the left and right side frames constituting the movable frame 36 with a width size for gripping the sheet, and the rod 38 is provided on the grip member 33a on the movable side. The bearing 37 is fitted and supported. A pinion 40 of the grip motor M6 is meshed with a rack gear 39 formed integrally with the rod 38.

  Accordingly, the grip members 33a and 33b execute a grip operation for gripping the sheet bundle by the grip motor M6, deflect the gripped sheet bundle from a horizontal posture to a vertical posture by the turning motor M5, and then the sheet bundle in the vertical posture. Is transferred to the downstream application position Y and the downstream binding position X along the bookbinding path P5 by the lifting motor M7. Sg shown in the drawing is a grip end sensor, which is arranged on the movable grip member 33a and detects whether or not the sheet bundle is securely held at a predetermined pressure.

  When the movable grip member 33a is moved in the direction of gripping the sheet bundle by the grip motor M6, the grip motor M6 approaches the fixed grip member 33b and engages with the sheet bundle. By this engagement, the grip end sensor Sg is turned on, and the grip motor M6 is driven by a predetermined amount from the signal. Then, the movable side grip member 33a further approaches the stationary side grip member 33b and stops while accumulating power in a power storage spring (not shown) with the sheet bundle interposed therebetween.

  This makes it possible to grip the sheet bundle with a predetermined pressure. When the elevation motor M7 is driven in this state, the sheet bundle conveying means 30 moves in a state where the sheet bundle is gripped in the downward direction in FIG. 2 and transfers the sheet bundle to the downstream application position Y and binding position X.

[Adhesive application means]
As shown in FIG. 5 (a), the adhesive application means 49 includes an adhesive container 50 that contains an adhesive such as glue, an application roll 51 that is rotatably mounted in the container, and an adhesive in the container. A heating means 50h for heating, a drive motor M8 for rotationally driving the coating roll 51, and a drive motor M9 for reciprocatingly driving the glue container 50 along the sheet bundle are configured.

  FIG. 5B shows a conceptual diagram of the application operation, and the glue container 50 is formed to have a short length (dimension) with respect to the back binding end surface Sx of the sheet bundle, and the application roll 51 incorporated therein. At the same time, it is supported by the guide rail 52 of the apparatus frame so as to move along the back binding end surface Sx of the sheet bundle. The glue container 50 is connected to a timing belt 53 attached to the apparatus frame, and a driving motor M9 is connected to the timing belt 53.

  As described above, the configuration in which the glue container itself moves along the sheet bundle is shown. This is because the glue container 50 is configured in a tray shape longer than the length of the sheet bundle, and only the coating roll 51 moves in the left-right direction in the figure. You may make it do. The illustrated application roll 51 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.

  Therefore, as shown in FIG. 5B, the glue container 50 is reciprocated by the drive motor M9 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 the figure, and the return position RP is set based on the 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 preceding grip end sensor Sg of the sheet bundle conveying means 30, for example, the sheet bundle reaches the application position. It moves from the home position HP toward the return position RP at the estimated time). Simultaneously with this movement, the application roll 51 starts to rotate by the drive motor M8.

  By the rotation of the drive motor M9, the glue container 50 starts to move from the right side to the left side along the guide rail 52 in FIG. Then, a predetermined gap is formed between the application roll surface and the back binding end surface Sx to apply the adhesive. The application amount of the adhesive applied to the sheet is adjusted by changing the application gap. This gap Ga is adjusted by the feed amount of the lifting motor M7 of the sheet bundle conveying means 30 described above.

  The application amount adjustment by the feeding amount of the sheet bundle is based on the bundle thickness information from the sheet bundle thickness detecting unit St described above, and when the bundle thickness is thick, the gap is increased and the application amount is set larger. When the film is thin, the gap is reduced and the coating amount is set small. As described above, in addition to the method of adjusting the feed amount of the sheet bundle by the control of the lifting motor M7 of the sheet bundle conveying means 30, roll position adjusting means for adjusting the height position of the coating roll 51 up and down may be provided. . Further, the drive motor M9 moves to a retracted position (not shown) which is retracted at a distance from the operating position for applying the adhesive to the sheet bundle in response to the retract instruction signal, and the adhesive is replenished from the adhesive tank disposed at this position. Have come to receive.

[Inserter device]
Next, the sheet bundle glued by the adhesive application means 49 is bound to the cover sheet. The feeding of the cover sheet will be described. As shown in FIG. 1, sheets on which images have been formed are sequentially carried out to the paper discharge port 9 of the image forming apparatus A, and usually a storage stacker 71 is prepared in the paper discharge port 9.

  A sheet carry-in path P1 as a bookbinding apparatus B, which will be described later, is connected to the paper discharge port 9, and an inserter device J is attached to the sheet carry-in path P1. The inserter device J has one or a plurality of stages for stacking sheets, the illustrated one is a two-stage stack tray 16, a pickup means 17 for separating sheets on the stack tray 16 one by one, and a pickup from the pickup means 17 The sheet feeding path P2 guides the sheet to the sheet carry-in path P1.

  Then, the sheets set on the stack tray 16 are supplied to the sheet carry-in path P <b> 1 between the sheets sequentially carried out from the paper discharge port 9 of the image forming apparatus A. That is, after a series of sheets are formed from the image forming apparatus A and carried out, the sheets are supplied from the stack tray 16 after the final sheet.

  Accordingly, a special sheet such as a cardboard or a coated paper is prepared as a cover sheet in the stack tray 16, and the sheet on the stack tray 16 is carried into the sheet carry-in path P1 by a control signal from the bookbinding apparatus B described later. The two stack trays 16 are provided so that different types of cover sheets can be prepared in advance in the stacker, and the cover sheets are supplied from one selected stacker.

[Cover route]
A sheet feeding path P2 of the inserter device J is connected to the sheet carry-in path P1, and a cover sheet from the sheet feeding path P2 is guided to the cover sheet feeding path P4 via the path switching flapper 15. The cover sheet feeding path P4 intersects with the bookbinding path P5 so as to be orthogonal to each other, and the sheet bundle from the bookbinding path P5 and the cover sheet are joined in a reverse T shape at the intersection (hereinafter referred to as a binding position X). It is like that.

  The cover sheet feeding path P4 includes upper and lower transport guides 63a and 63b and a lower transport guide 65g that are vertically opposed to each other at a predetermined interval. The upper transport guides 63a and 63b are bordered by an intersection (binding position X) with the bookbinding path P5. The left and right transport guides 63a and 63b are individually opened and closed by being divided into a right first upper transport guide 63a and a left second upper transport guide 63b.

  In the cover sheet feeding path P4, registration means 55 for aligning the cover sheet in the conveyance direction and the conveyance orthogonal direction, and cover sheet feeding for conveying the cover sheet aligned by the registration means 55 to the binding position X Means F are arranged. The cover sheet feeding means F is composed of a pair of conveying rollers arranged in the cover sheet feeding path P4, and includes a driving roller 65r attached to the lower conveying guide 65g and a driven roller 63c attached to the upper conveying guides 63a and 63b. It is composed of

  A drive motor M10 is connected to the drive roller 65r. On the other hand, the upper conveyance guides 63a and 63b and the driven roller 63c are attached to the apparatus frame by a cam lever or the like so as to be movable between a position where the upper conveyance guides 63a and 63b are pressed against the driving roller 65r and a position where the upper conveyance guides 63a and 63b are lifted and separated.

  Therefore, the upper conveyance guides 63a and 63b and the driven roller 63c are separated from the cover sheet by an operation position in which the upper cover guide 63a and 63b and the driven roller 63c are brought into pressure contact with the cover sheet in the cover sheet feeding path by a cam motor driving motor (not shown) It is configured to be movable between the retracted position that has floated. Thus, the cover sheet is conveyed to the binding position X, which is the intersection of the cover sheet feeding path P4 and the bookbinding path P5, and is set at a predetermined position.

  The upper conveyance guides 63a and 63b at the binding position X are configured by opening / closing guide plates, and are movable between a position where the bookbinding path P5 is blocked and the upper part of the cover sheet is guided and a retreat position retracted from the bookbinding path P5. It is configured. Then, after guiding the cover sheet, the second upper transport guide 63b retracts upward so as to open the bookbinding path P5.

[Cover binding mechanism]
At the binding position X, a cover binding means H is provided, and a sheet bundle from the bookbinding path P5 and a cover sheet from the cover sheet feeding path P4 are joined in an inverted T shape and back-folded. First, in the bookbinding path P5, the sheet bundle held by the sheet bundle conveying means 30 is glued to the back binding end surface Sx of the sheet bundle by the adhesive application means 49, and the glue container 50 is retracted to the home position HP outside the path. The sheet bundle conveying unit 30 then transfers the sheet bundle from the application position Y to the binding position X along the bookbinding path P5. At the same time, the cover sheet is fed to the binding position X in the cover sheet feeding path P4 and is set stationary.

  Therefore, the cover binding means H includes a back support member 64 and a back folding press member 65 as shown in FIG. The backrest member 64 is provided so as to freely advance and retract between a backup position that has entered the bookbinding path P5 and a retracted position that has been retracted outside the path. The back support member 64 backs up and supports the cover sheet stationary on the cover sheet feeding path P4 at the backup position, and reverses the sheet bundle and the cover sheet transported by the sheet bundle conveying means 30 from the bookbinding path P5. Join in a letter shape.

  The back support member 64 opens the bookbinding path P5 in the retracted position, and the sheet bundle conveying means 30 moves toward the folding roll 70 located on the downstream side by retracting the back support member 64 from the bookbinding path P5. Can be carried out.

  Accordingly, the back support member 64 is supported by the apparatus frame so as to be movable so as to cross the bookbinding path P5 in the orthogonal direction, and is connected to driving means (electromagnetic solenoid, motor, etc.) not shown. In particular, the illustrated backing member 64 is formed of a metal plate having a high thermal conductivity and a large heat dissipation effect, and cools the adhesive applied to the sheet bundle (the illustrated one is a hot-melt adhesive). Yes. In this state, the cover sheet and the sheet bundle are joined in an inverted T-shape while being backed up and supported by the back support member 64, and the back folding press member 65 that bends the back portion of the cover sheet in this state is provided upstream of the back support member 64. It is arranged on the side (upper side).

  The back folding press member 65 is disposed at the binding position X as shown in FIG. 3, and a pair of left and right press members 65a and 65b, and a shift means for reciprocating the press members 65a and 65b between the back folding position and the standby position. 66 and a control means (control CPU to be described later) 80 for controlling the shift means 66.

  The right press member 65a and the left press member 65b are slidably supported by an apparatus frame (not shown), and a press piece 65p is provided at the tip. The back of the cover sheet is bent with the left and right press pieces. For this reason, a rack gear 66a is integrally provided on the left and right press members 65a and 65b, and a pinion 66b connected to the shift motors M3a and M3b is meshed with the rack gear 66a. The shift motors M3a and M3b are stepping motors.

[Configuration of bundle posture deflection means]
At a cutting position Z located on the downstream side of the folding roll 70, a bundle posture deflecting means 67 for deflecting the top and bottom direction of the sheet bundle and a cutting means 60 for cutting the periphery of the sheet bundle are arranged. The bundle posture deflecting unit 67 deflects the sheet bundle mounted from the binding position X in a predetermined direction (posture) and feeds the sheet bundle to the downstream cutting unit 60 or the storage stacker 71. Further, the cutting unit 60 trims the peripheral edge of the sheet bundle.

  Therefore, the bundle posture deflecting unit 67 includes rotary tables 67a and 67b that grip and rotate the sheet bundle sent from the folding roll 70. As shown in FIG. 3, the rotary tables 67a and 67b are provided on a unit frame 67f attached to the apparatus frame so as to be movable up and down. A pair of rotary tables 67a and 67b are rotatably supported by the unit frame 67f with the bookbinding path P5 interposed therebetween, and one movable rotary table 67a is in the sheet bundle thickness direction (a direction orthogonal to the bookbinding path P5). It is supported to move freely.

  The rotary tables 67a and 67b are provided with turning motors Mt1 and Mt2 so as to deflect the posture of the sheet bundle in the bookbinding path. The movable rotary table 67a 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 is gripped by the pair of left and right rotary tables 67a and 67b, and the posture 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 deflected downward at the cutting position Z on the downstream side to cut the three peripheral directions of the sheet bundle.

  The movable rotary table 67a is provided with a grip sensor (not shown) to detect that the sheet bundle is securely gripped between the left and right rotary tables 67a and 67b, and the post-detection rotary table 67a. , 67b is driven to turn. The unit frame 67f can move the sheet bundle up and down along the bookbinding path P5 by a lifting motor MA.

  As described later, this constitutes a jog mechanism for offsetting the sheet bundle transferred to the paper discharge roller 72 by a predetermined amount. At the same time, when cutting the peripheral edge of the sheet bundle, the sheet bundle is conveyed and set at the cutting position Z, and the feeding is performed. This is because the cutting width at the cutting position Z is set by the amount.

[Composition of cutting means]
A cutting means 60 is disposed downstream of the bundle posture deflection means 67. As shown in FIG. 3, the cutting means 60 includes a cutting edge press member 60b that presses and supports the cutting edge of the sheet bundle on the blade receiving member 60a, and a cutting blade unit 60c. The cutting edge press unit 60b is arranged at a position facing the blade receiving member 60a arranged in the bookbinding path P5, and is composed of a pressure member that moves in a direction orthogonal to the sheet bundle by a driving means (not shown).

  The cutting blade unit 60c includes a flat blade-shaped cutting blade and a cutter motor MC that drives the cutting blade. The cutting means 60 having such a configuration cuts and aligns a predetermined amount of the periphery of the sheet bundle (hereinafter referred to as “bookbinding sheet”) that has been bound into a booklet shape, except for the back.

  As shown in FIG. 6D, the bookbinding sheet is trimmed by cutting the top portion of the bookbinding sheet by the cutting amount Lct, and then rotating the rotary tables 67a and 67b by 180 degrees to cut the ground portion by the cutting amount Lcc. The cutting amounts Lct and Lcc are calculated by, for example, Lct = Lcc = [[(inner paper sheet size) − (finishing size)] / 2]. Next, the rotary tables 67a and 67b are rotated 90 degrees to cut the fore edge portion with the cutting amount Lck. The cutting amount Lck is calculated by, for example, Lck = (medium sheet size) − (finishing size).

  On the other hand, the cutting amount of the cover sheet is calculated in the same manner as described above. At this time, the cutting amount Lck of the fore edge is calculated by, for example, Lck = [{(cover sheet size) − (bundle thickness)} ÷ 2− (finishing size)]. Then, the cutting amount of the cover sheet and the cutting amount of the intermediate paper sheet are calculated, respectively, and the cutting process is executed by setting the larger length as the cutting amount. Thus, the cutting amount calculation means 86 described later is configured.

[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 P6 connected to the cover sheet feeding path P4. The post-processing path P6 includes a staple unit, a punch unit, and a stamp. A post-processing device such as a unit is arranged to receive a print sheet from the image forming apparatus A via the cover sheet feeding path P4, and to perform a staple process, a punch process, and a seal process on the print sheet, and then to the discharge tray 29 To do. Further, the sheet from the image forming apparatus A that is not subjected to such post-processing is stored in the paper discharge tray 29.

[Main Configuration of the Present Invention]
In the configuration of the bookbinding apparatus B as described above, the adhesive application means 49 and the control means 80 for controlling the cutting means 60 are configured as follows. As described above, the sheets fed from the image forming apparatus A are stacked and aligned in the stacking tray 22 arranged in the bookbinding path P5. In response to a job end signal from the image forming apparatus A, the sheet bundle on the stacking tray is delivered to the sheet bundle conveying unit 30.

  Then, the control unit 80 deflects the sheet bundle from the horizontal posture to the vertical posture by the sheet bundle conveying unit 30, and passes the application position Y to the cutting position Z disposed on the downstream side thereof and transfers the sheet bundle. The control unit 80 deflects the posture of the sheet bundle by the bundle posture deflecting unit 67. This posture deflection is rotated by 180 degrees to deflect the posture of the sheet bundle so that the end face Sk of the sheet bundle faces the coating roll 51.

  8A shows a state in which the sheet bundle is transported to the cutting position Z by the sheet bundle conveying means 30, and FIG. 8B shows a state in which the edge position Sk is positioned downward by the bundle orientation deflecting means 67. Indicates the state of deflection.

  Next, the control unit 80 moves the posture-deflected sheet bundle backward from the cutting position Z to the coating position Y along the bookbinding path P5. Then, at the application position Y, the edge portion Sk of the sheet bundle is positioned so as to face the application roll 51, and an adhesive is applied to this end surface. FIG. 9A shows a state in which an adhesive is applied to the end edge Sk of the sheet bundle.

  Next, the control means 80 transfers the sheet bundle from the application position Y to the cutting position Z, and rotates the attitude of the sheet bundle by 180 degrees by the bundle attitude deflecting means 67 so that the edge end face Sk to which the adhesive is applied is directed upward. The binding end surface Sx is positioned below. Therefore, the control unit 80 moves the sheet bundle backward from the cutting position Z to the coating position Y by the sheet bundle conveying unit 30. FIG. 9B shows a state in which the sheet bundle is rotated 180 degrees at the cutting position Z and deflected so that the back binding end surface Sx is positioned downward.

  Then, the control unit 80 feeds and sets the cover sheet from the cover sheet feeding path P4 to the binding position X, and after the setting, the adhesive is applied to the back binding end surface Sx of the sheet bundle (the state shown in FIG. 10A). The application amount of the adhesive increases or decreases in proportion to the bundle thickness based on the detection result from the above-described sheet bundle thickness detection unit St, for example. The application amount adjustment of the adhesive is performed by adjusting the gap between the application roll 51 and the sheet end surface by the sheet bundle conveying unit 30.

  Then, the control unit 80 feeds and sets the cover sheet to the binding position X from the cover sheet feeding path P4 before and after applying the adhesive to the back binding end surface Sx. And the sheet | seat bundle which apply | coated the adhesive agent to the back binding end surface Sx is joined to a cover sheet in reverse T shape as shown in FIG.10 (b). Thereafter, the cover sheet is back-folded by the back folding press member 65 (state shown in FIG. 11A), and the bundle of sheets after bookbinding is transferred toward the cutting position Z (state shown in FIG. 11B). At the cutting position Z, as shown in FIG. 12B, the three directions (the top portion, the ground portion, and the fore edge portion) of the sheet bundle after bookbinding are sequentially cut.

  As described above, when applying the adhesive to the small edge portion end surface Sk and then the back binding end surface Sx of the sheet bundle, the present invention reduces the application amount of the small edge end surface Sk as compared with the application amount of the back binding end surface Sx. It is characterized by that.

  In the illustrated embodiment, the adhesive is uniformly applied to the fore edge end surface Sk over the entire length, and the application amount of the fore edge end surface Sk is reduced, but it is intermittently applied to a part of the fore edge end surface. Is also possible. For example, it is not always necessary to uniformly apply the adhesive to the end face Sk of the fore edge, and the adhesive may be applied to only one of the corner parts or intermittently so as to draw a dotted line. . FIG. 6B shows a case where an adhesive is intermittently applied to the edge portion end face Sk in a dotted line shape. Then, when the adhesive is applied to the back binding end surface Sx of the sheet bundle by the adhesive application means 49, control is performed so that the adhesive is not applied to the cutting area of the top portion or the ground portion.

  Similarly, when applying the adhesive to the back binding end surface Sx, the application roll 51 is reciprocated a plurality of times to apply the adhesive, and the small edge portion end surface Sk is also bonded in a laminated manner over a plurality of times. Apply the agent. At this time, the application amount may be adjusted by setting the number of times of overcoating of the edge end surface Sk to be smaller than the number of times of overcoating of the back binding end surface Sx.

  Further, according to the present invention, a cutting area KAr of the fore edge is set by the cutting amount calculation means 86 described above, and an adhesive is applied to the sheet end surface of the cutting area. That is, in the above description, the case where the adhesive is applied to the edge portion end surface Sk has been described. However, the cutting area KAr is not limited to the edge portion end surface, and may be the top portion end surface or the ground portion end surface.

[Control configuration]
Next, the overall configuration of the control means 80 will be described with reference to the block diagram of FIG. In the system in which the image forming apparatus A and the bookbinding apparatus B are connected as shown in FIG. 1, for example, a control panel 76 and a mode setting unit 77 are provided in the control unit 75 of the image forming apparatus A. The control unit (control CPU) 75 of the image forming apparatus A executes the bookbinding operation of the bookbinding apparatus B in accordance with, for example, the “printing process mode” and “bookbinding process mode” set on the control panel 76.

  In the print processing mode, the bookbinding apparatus B transports the print sheet carried into the sheet carry-in path P1 by the path switching flapper 15 to the post-processing apparatus C from the cover sheet feeding path P4 and the post-processing path P6 shown in FIG. The paper is stored in a paper discharge tray 29 provided in the apparatus C. Accordingly, the print sheet only passes through the bookbinding apparatus B.

  When the bookbinding process mode is selected, the bookbinding apparatus B guides the print sheet from the sheet carry-in path P1 to the intermediate sheet transport path P3, and binds the booklet to the storage stacker 71 through the sheet stacking process, the adhesive application process, and the cover sheet binding process. Store the used sheet.

  When the bookbinding mode is selected in this way, the control CPU 75 of the image forming apparatus A transmits the bookbinding mode instruction signal and the size information of the print sheet to the bookbinding apparatus B at the same time. At this time, the thickness information such as the basis weight of the cover sheet and the material information such as whether the paper sheet is rigid or soft are input from the input unit 78, and the control unit (control CPU) 80 of the bookbinding apparatus B is input. To communicate. At the same time, at the time of printing the number of copies, for example, n pages, a job end signal is transferred to the control means (control CPU) 80 of the bookbinding apparatus B when printing of the last n pages is completed.

  Therefore, the control means (control CPU; the same applies hereinafter) 80 includes a bookbinding and binding control unit 80A and a trimming finishing control unit 82. The control CPU 80 includes a drive motor (not shown) for the conveyance roller in the sheet carry-in path P1, a drive motor M1 for the discharge roller 21 in the intermediate sheet conveyance path P3, and a drive motor M10 for the drive roller 65r in the cover sheet conveyance path P4. Transport system driver circuit is connected.

  Similarly, it is connected to drive circuits for a tray lifting motor M4 that lifts and lowers the stacking tray 22, a grip motor M6 of the sheet bundle conveying means 30, and a lifting motor M7. Further, a drive motor M8 for the application roll 51, a drive motor M9 for reciprocating the glue container, and shift motors M3a, M3b for the back folding press member 65 are also connected to the control CPU 80.

  In particular, the shift motors M3a and M3b are stepping motors, and are connected to the power pulse generator so that command signals such as the duty of the pulse power supply, the drive start timing, and the drive end timing are issued from the control CPU 80.

  On the other hand, the control CPU 80 has a detection signal from the sheet bundle thickness detection means St, a detection signal from the grip end sensor Sg, a home position sensor (not shown) of the back folding press member 65, and sensors arranged in the paths P1 to P5. Are connected so that the detection signal is transmitted.

  The control CPU 80 has an operation for stacking the intermediate paper sheets on the stacking tray 22, an operation for transporting the sheet bundle from the stacking tray 22 to the coating position Y and the binding position X by the sheet bundle transporting unit 30, and the coating position Y. A control program for performing an operation of applying an adhesive, an operation of joining a sheet bundle and a cover sheet at the binding position X, a back folding press operation for folding the cover sheet after joining, and an operation of carrying out the sheet bundle after the back folding. Storage means (ROM) 84 is provided.

  At the same time, the control CPU 80 stores the control data storage means (RAM) 85 such as the speed information of the shift motors M3a and M3b for driving the back folding press member 65, the start timing (timer table), and the cutting amount calculation means 86 described below. It has.

[Configuration of cutting amount calculation means]
The cutting amount calculation unit 86 will be described. The “cutting amount calculation unit 86” is configured in the control CPU 80, and calculates a cutting amount for cutting the peripheral edge of the sheet bundle after the bookbinding process. For this reason, the cutting amount calculation unit 86 receives the folding specification information and the sheet size information set in the mode in the image forming apparatus A from the control unit 75 of the image forming apparatus A.

  This will be described with reference to FIG. 6. The cutting amount calculation unit 86 receives the size information of the middle sheet and the size information of the cover sheet that are not folded from the control unit 75 of the image forming apparatus A. On the other hand, “bookbinding finish size” information is transferred from the image forming apparatus A to the cutting amount calculation means 86, and this finish size is size information selected by an operator such as JIS standard A5 or a trimming cut set in advance. The amount “αmm (for example, 5 mm may be specified by the operator)” or any cutting condition is specified.

  Therefore, the cutting amount calculation means 86 calculates (1) the cutting amount (length; the same applies hereinafter) Lct, Lcc, and Lck of the intermediate paper sheet from these pieces of information according to the cutting conditions. This calculation method is the same as described above when “finishing size” is designated. (2) Next, the cutting amount calculation means 86 calculates the cutting amount (top portion), (base portion), and (edge portion) of the cover sheet. In this case, the bundle thickness of the intermediate paper sheet is taken into account.

  Next, the cutting amount calculation means 86 compares the cutting amount of the middle sheet and the cutting amount of the cover sheet for each side of the top portion, the ground portion, and the edge portion, and the longer cutting amount of the middle sheet and the cover portion is the actual cutting amount. Set to.

  Note that the calculation of such a cutting amount differs depending on the system configuration. For example, when a sheet having a size specified by the image forming apparatus A is not prepared, an operator needs to specify a “finishing size” when printing on a sheet larger than the specified size and cutting an excess blank portion after bookbinding processing. There is.

[Cutting Finish Control Unit]
The above-described control CPU 80 is provided with a cutting finish control unit 82, and this control unit 82 is configured to select whether or not to apply an adhesive to the cutting area KAr of the fore edge set by the cutting amount calculation means 86. Has been. For this reason, the control unit 80 sets the trimming finishing mode from the control unit 75 of the image forming apparatus A, and when the fore edge trimming is designated by this mode setting (trimming or trimming in the one direction), the fork edge portion is set. It is determined whether or not an adhesive is applied. This determination is made so that the adhesive is applied when the area of the cutting area is large or the basis weight of the intermediate paper sheet is larger than a predetermined value set in advance. ing.

  This set value is such that when the cutting amount calculating means 86 has a cutting area of the fore edge portion larger than a predetermined value, there is no possibility that the waste paper pieces from the cutting will be scattered in the apparatus. In such a case, a reference cutting area is stored in advance in the RAM 85 so that the adhesive is not applied to the cutting area KAr in the fore edge. Similarly to the cutting area of the fore edge, even if the area is equal to or less than a predetermined value, there is no possibility that the waste paper pieces due to the cutting will scatter in the apparatus when the basis weight of the intermediate paper sheet is large (thick paper sheet). Therefore, the basis weight of the reference sheet is stored in the RAM 85 in advance.

  The cutting finish control unit 82 acquires the basis weight information of the intermediate sheet from the image forming apparatus A at the same time as the finishing mode instruction signal, and the cutting area of the fore edge calculated by the cutting amount calculation unit 86 according to this data and the RAM 85. The read predetermined value (reference value) is compared to determine whether or not to apply the adhesive to the fore edge.

  In the present invention, when the adhesive is applied to the small edge portion of the sheet bundle, the sheet bundle is conveyed from the stacking tray 22 to the cutting position Z, and after changing the posture of the small edge portion by the bundle posture changing means 67, the adhesive agent is used. Although a mode in which switchback conveyance is performed to the application position is illustrated, the posture of the sheet bundle may be changed during the transfer of the sheet bundle from the stacking tray 22 to the adhesive application position Y. In this case, for example, the sheet bundle may be rotated by the above-described sheet bundle conveying unit 30 so that the fore edge portion is positioned on the lower side.

A Image forming apparatus B Bookbinding apparatus C Post-processing apparatus P4 Cover sheet feeding path P5 Bookbinding path X Binding position Y Coating position Z Cutting position 22 Sheet stacking unit (stacking tray)
30 Sheet bundle conveying means 49 Adhesive application means 50 Glue container 51 Application roll 60 Cutting means 64 Backing member 65 Back folding press member 65a Right press member 65b Left press member 67 Bundle orientation deflection means 67a Rotary table (movable)
67b Rotary table 71 Storage stacker 75 Control unit 76 Control panel 77 Mode setting means 78 Input means 80 Control means (control CPU)
81 Bookbinding control unit 82 Cutting finish control unit 84 ROM
85 RAM
86 Cutting amount calculation means KAr Cutting area of the fore edge

Claims (10)

A bookbinding device that binds sheet bundles and trims at least the fore edge,
A bookbinding path for transferring the sheet bundle in the order of the adhesive application position and the cutting position;
An adhesive application means that is arranged at the adhesive application position and applies an adhesive to the end face of the sheet bundle;
A cutting means disposed at the cutting position for cutting a fore edge of the sheet bundle;
Control means for controlling the adhesive application means and the cutting means;
With
The control means includes
A cutting amount calculating means for calculating a cutting area of the edge portion of the sheet bundle is provided,
A bookbinding apparatus that performs cutting processing on a fore edge after applying an adhesive to a cutting area of the fore edge set by the cutting amount calculation unit. In the bookbinding processing path, a bundle posture deflecting unit 7 for deflecting the posture of the sheet bundle is disposed.
2. The bookbinding apparatus according to claim 1, wherein the control unit deflects the posture of the sheet bundle by the bundle posture deflecting unit and applies an adhesive to the cutting area of the edge portion. The control means is configured to apply an adhesive to the back-binding end surface and the fore edge end surface of the sheet bundle,
2. The control unit according to claim 1, wherein the control unit controls the adhesive application unit so that the amount of adhesive applied to the end surface of the small edge portion is smaller than the amount of adhesive applied to the end surface of the back binding. Bookbinding equipment. When the control means applies an adhesive to the cutting area of the fore edge,
2. The bookbinding apparatus according to claim 1, wherein an adhesive is applied to any one of the edge part end face, the top part end face, and the ground part end face of the cutting area. The control means is configured to apply an adhesive to the back-binding end surface and the edge portion end surface of the sheet bundle,
The control means is configured to apply adhesive on the spine binding end face and the fore edge end face multiple times, respectively.
2. The bookbinding apparatus according to claim 1, wherein the number of times of application of the end surface of the fore edge is less than the number of times of application of the back binding end surface. When the control means applies an adhesive to the cutting area of the fore edge,
The bookbinding apparatus according to claim 1, wherein an adhesive is partially applied to a plurality of portions on the end surface of the fore edge of the cutting area. The control means includes
While being configured to be able to select whether to apply an adhesive to the cutting area of the fore edge set by the cutting amount calculation means,
2. The bookbinding apparatus according to claim 1, wherein the bookbinding apparatus is configured to select whether or not to apply an adhesive according to an area or volume of the cutting area of the fore edge. The control means includes
While being configured to be able to select whether to apply an adhesive to the cutting area of the fore edge set by the cutting amount calculation means,
The bookbinding apparatus according to claim 1, wherein the bookbinding apparatus is configured to select whether or not to apply an adhesive according to a basis weight of sheets constituting the sheet bundle. The control means includes
The cutting means is controlled so as to cut at least one of the top portion and the ground portion together with the edge portion of the sheet bundle,
When the adhesive is applied to the back binding end surface of the sheet bundle by the adhesive application means, the adhesive application means is controlled so that the adhesive is not applied to the cutting area of the top portion or the ground portion. The bookbinding apparatus according to claim 1. An image forming apparatus for sequentially forming images on sheets;
A bookbinding apparatus for binding and binding sheets from the image forming unit;
Consisting of
An image forming system comprising the bookbinding apparatus according to any one of claims 1 to 9.

Images