JP2016117268A - Bookbinding device and image formation device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bookbinding device in which, during registration taking operation for determining cutting reference, no such events occur as a swelling portion catches because of insufficient opening amount of a cutting edge press member for pressing a sheet bundle, and abrasion takes place with a press surface because registration taking cannot be performed, to cause a flaw on a front cover surface.SOLUTION: A bookbinding device includes adhesive applying means for applying an adhesive to a sheet bundle back part end face from accumulation tray means, front cover binding means for binding a front cover sheet to a sheet bundle, acquiring means for acquiring basis weight information of the front cover sheet, back folding means for performing a back folding process with the sheet bundle, transportation means for transporting the sheet bundle, and cutting means for cutting the sheet bundle. The cutting means includes a cutting edge press member which presses the sheet bundle between a blade receiving member and a blade receiving member, a cutting blade for cutting an end part of the sheet bundle having been pressed by the blade receiving member and the cutting edge press member, and moving means for moving the blade receiving member and the cutting edge press member relative to each other. The cutting means includes control means for controlling the moving means according to the basis weight of the front cover sheet that is acquired by the acquiring means.SELECTED DRAWING: Figure 10

Description

  In the present invention, sheets supplied sequentially from an image forming apparatus or the like are aligned, an adhesive is applied to the end face, and the cover sheet is bound and mounted, and then the sheet bundle after the mounting is gripped by a press member In particular, the present invention relates to a bookbinding method and a bookbinding apparatus that trims and trims the peripheral edge in the state and an image forming system using the booklet. By changing the amount of movement of the press member that holds the sheet bundle according to the information, the cover sheet is prevented from being scratched by rubbing between the cover sheet and the press member, and the position of the sheet bundle due to rubbing between the cover sheet and the press member The present invention relates to an improvement of an apparatus capable of preventing a shift.

  In general, this type of bookbinding apparatus collects sheets conveyed from an image forming apparatus or the like in a bundle and aligns them. After applying an adhesive to the back binding end surface of the sheet bundle and binding the cover sheet, Widely known as a device that presses the cover part into a booklet and mounts it in a booklet and stores it in a stacker, or cuts the periphery of this booklet-shaped sheet bundle by a predetermined amount (trimming cut) and stores it in the stacker It has been.

  Conventionally, for example, as disclosed in Patent Document 1, a sheet conveyed from an image forming apparatus is guided to a stacking tray, and a bundle of sheets is conveyed from the tray to a glue application position by a grip conveying unit or the like. Adhesive is applied to the back end face and conveyed and set at the downstream cover binding position. Then, a cover sheet is fed and set from the image forming apparatus or the inserter device to the cover binding position, and the sheet bundle and the cover sheet are joined in an inverted T shape, and then back-folded and conveyed to a downstream cutting position. To do. The trimming unit provided at this cutting position cuts and aligns the peripheral edge of the sheet bundle, and then stores it in the stacker. For this reason, an adhesive application unit, a cover binding unit, and a cutting unit are sequentially arranged in the bookbinding process path from the stacking tray to the stacker, and the bookbinding process path includes a cover sheet conveyance path for supplying a cover sheet to the cover sheet binding position. It is arranged to intersect.

  Therefore, in the apparatus disclosed in Document 1, first, in order to align the sheets, the sheets are stacked in a bundle on the stacking tray, and the sheet bundle is conveyed and set on the downstream side. Apply the adhesive, then transport it to the downstream cover binding position, bind it to the cover sheet, form the back fold, then transport it to the downstream cutting position, and remove the back of the sheet bundle at this cutting position. A predetermined amount of the portion, the ground portion, and the fore edge portion are sequentially cut and stored in the storage stacker. That is, a bookbinding method is employed in which sheets from an image forming apparatus or the like are processed in the order of stacking and alignment, glue application, cover binding, and trimming.

JP 2003-292230 A

As described above, in the process of cutting and aligning the peripheral edge of the sheet bundle with the trimmer unit provided at the cutting position, when the entire sheet bundle is pressed, the registration operation is performed based on the measured bundle thickness. In the conventional bookbinding apparatus that determines the press amount, the swelling of the cover sheet is not taken into consideration.
For this reason, when gripping a case-bound sheet bundle, the cover sheet side may swell depending on the basis weight, eye direction, curl amount, etc. of the cover sheet. Since the opening amount of the press is determined based on the measured bundle thickness, it is not taken into consideration in the cover sheet swelling.
Therefore, as shown in FIG. 9, when the sheet bundle is raised or lowered or when the registration operation is performed, the amount of opening of the press member is not enough, and the bulging portion is caught, and the registration surface cannot be surely removed and the cutting surface is shifted. . Furthermore, there is a problem that the cover surface is scratched by rubbing against the press surface.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bookbinding apparatus that eliminates the disadvantages of the prior art, can reliably perform registration at the time of raising and lowering a sheet bundle or performing a registration operation, and does not cause scratches on the cover. .

In order to solve the above-described problems, a bookbinding apparatus according to the present invention binds a cover sheet to an adhesive application unit that applies an adhesive to the sheet bundle back end surface from the stacking tray unit and a sheet bundle to which the adhesive is applied. Cover binding means, acquisition means for acquiring basis weight information of the cover sheet, back folding means for performing a back folding process on the sheet bundle obtained by binding the cover sheets, conveying means for conveying the sheet bundle, and sheet bundle The cutting means is pressed by a cutting edge press member for pressing a sheet bundle between the blade receiving member and the blade receiving member, and the blade receiving member and the cutting edge press member. A cutting blade for cutting the end of the sheet bundle, and a moving means for relatively moving the blade receiving member and the cutting edge press member, the cutting means being a cover sheet obtained by the obtaining means Depending on the basis weight, characterized in that with a control means for controlling said moving means.

In addition, the control unit of the bookbinding apparatus according to the present invention may be configured such that when the basis weight of the cover sheet acquired by the acquisition unit is greater than a predetermined value, the basis weight of the cover sheet is less than or equal to the predetermined value. Is characterized in that the opening of the moving means is widened.

Further, the control means of the bookbinding apparatus according to the present invention is characterized in that when the cover sheet is vertical, the opening of the moving means is wider than when the cover sheet is horizontal.

In addition, the bookbinding apparatus according to the present invention includes an initial stacking tray unit that sequentially stacks and aligns sheets, an adhesive application unit that applies an adhesive to an end surface of the back of the sheet bundle from the stacking tray unit, and the adhesive. The cover sheet is bound by the cover binding means for binding the cover sheet to the sheet bundle to which the adhesive is applied by the application means, the acquisition means for acquiring the basis weight information of the cover sheet, and the cover binding means. A back folding means for performing a back folding process on the sheet bundle, a conveying means for conveying the back-folded sheet bundle by the back folding means, and a cutting means for cutting the sheet bundle conveyed by the conveying means, The back folding means includes a control means for controlling a time for performing the back folding process of the back folding means according to the basis weight of the cover sheet acquired by the acquiring means.

In addition, when the basis weight of the cover sheet acquired by the acquisition unit is larger than a predetermined value, the control unit of the bookbinding apparatus according to the present invention has a case where the basis weight of the cover sheet is equal to or less than the predetermined value. Rather, the time for the back folding process of the back folding means is lengthened.

The control means of the bookbinding apparatus according to the present invention is characterized in that when the cover sheet is a vertical sheet, the back folding process time of the back folding means is longer than when the cover sheet is a horizontal sheet. And

The present invention moves the press member that holds the sheet bundle according to not only the thickness of the sheet bundle to be cut but also the cover information (basis weight, eye direction, curl amount, etc.) during the registration operation for determining the cutting reference. Change the amount.
Specifically, when the release amount of the press member in the case of cutting a case binding product with a small basis weight is D (FIG. 10A), the basis weight is large, the warp and the curl amount are large. Let D + α be the release amount of the press member when processing the case bound product on the cover (FIG. 10B).
Accordingly, it is possible to prevent the press member from being caught, and to reliably register, and further to prevent the cover surface from being damaged.

1 is an overall configuration diagram of an image forming system of the present invention. FIG. 2 is a detailed explanatory diagram of a bookbinding apparatus in the system of FIG. 1. Explanatory drawing which shows the structure of the grip conveyance means in the apparatus of FIG. FIGS. 3A and 3B are explanatory diagrams of a cover binding operation in the apparatus of FIG. 2, where FIG. 3A is a state diagram for deflecting a sheet bundle from a horizontal posture to a vertical posture, and FIG. 3B is a state diagram for transferring and setting the sheet bundle to a cutting position; FIGS. 3A and 3B are explanatory diagrams of a cover binding operation in the apparatus of FIG. 2, in which FIG. 3C is a state diagram for pressing and holding the sheet bundle at a cutting position, and FIG. 3D is a state diagram for cutting a lower edge of the sheet bundle. FIG. 4 is an explanatory diagram of a cover binding operation in the apparatus of FIG. 2, and (e) is a state diagram in which a sheet bundle after cutting is transferred and set to a glue application position. FIG. 4 is an explanatory diagram of a cover binding operation in the apparatus of FIG. 2, and (f) is a state diagram in which an adhesive is applied to a sheet bundle. (G) is a state diagram for joining a sheet bundle and a cover sheet. FIG. 4 is an explanatory diagram of a cover binding operation in the apparatus of FIG. 2, and (h) is a state diagram for binding back a sheet bundle and a cover sheet. (I) is a state diagram in which a sheet bundle is transferred and set to a cutting position. FIG. 4 is an explanatory diagram of a cover binding operation in the apparatus of FIG. 2, and (j) is a state diagram for cutting a sheet bundle at a cutting position. FIG. 6K is a state diagram in which the posture of the sheet bundle is deflected at the cutting position. The block diagram which shows the structure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. The flowchart which shows the operation | movement procedure of the control part in the apparatus of FIG. FIG. 3 is a configuration explanatory diagram of a bookbinding path different from the apparatus of FIG. 2. It is state explanatory drawing of the sheet | seat which apply | coated the adhesive agent in the conventional apparatus, (a) is the state which apply | coats an adhesive agent, (b) is a bookbinding state. FIG. 4D is a state diagram of a problem that occurs between (h) and (i) in FIG. 4E in a cover binding operation in a conventional apparatus. It is a schematic block diagram which shows the structure of the bookbinding apparatus which concerns on embodiment of this invention.

  Hereinafter, the present invention will be described in detail based on the preferred embodiments shown in the drawings. FIG. 1 is an explanatory diagram of the overall configuration of a bookbinding apparatus and an image forming system using the same according to the present invention, FIG. 2 is a detailed explanatory diagram of the bookbinding apparatus, and FIG. 3 is an explanatory diagram of a grip transport mechanism.

  The image forming system shown in FIG. 1 includes an image forming apparatus A that sequentially prints sheets, a bookbinding apparatus B attached downstream of the image forming apparatus A, and a post-processing apparatus disposed downstream of the bookbinding apparatus B. C. Then, the sheet on which the image is formed by the image forming apparatus A is bound by the bookbinding apparatus B. Further, the sheet not subjected to bookbinding is configured to pass through the bookbinding apparatus B and to post-process the print sheet by the post-processing apparatus C.

  First, the image forming apparatus A can employ various structures such as a copying machine, a printer, and a printing machine, but the illustrated one shows an electrostatic printing apparatus. In the image forming apparatus A, a paper feed unit 2, a printing unit 3, a paper discharge unit 4, and a control unit are built in the 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 by the switchback path and then sent to the registration roller 7 again to form an image on the back surface of the print sheet. In this way, the print sheet on which one side or both sides are formed is carried out from the paper discharge port 14 by the paper discharge roller 15.

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

  Next, the bookbinding apparatus B attached to the image forming apparatus A will be described. The bookbinding apparatus B includes a stacking unit 40 (hereinafter referred to as “stacking tray 41”) for stacking print sheets in a bundle in the casing 30 and aligning adhesive paste on the sheet bundle back end surface from the stacking tray 41. It is composed of an adhesive application means 55 for applying, and a cover binding means 60 for binding the cover sheet to the end face of the back of the sheet bundle to which the adhesive is applied. The stacking tray 41 is provided with an intermediate paper conveyance path 32 on the upstream side and a bookbinding path 33 on the downstream side. The stacking unit 40 is configured by the stacking tray 41 arranged in a substantially horizontal direction, and stacks and stores print sheets from the sheet discharge port 32a of the intermediate paper transport path 32, and the bookbinding path 33 is formed in a substantially vertical direction. Has been.

  A forward / reverse roller 42a and a carry-in guide 42b are provided above the stacking tray 41. A print sheet from the paper discharge port 32a is guided onto the stacking tray 41 by the carry-in guide 42b and stored by the forward / reverse roller 42a. . The forward / reverse roller 42a stores the print sheet in the stacking tray 41 by forward rotation, and restricts the rear end of the sheet against the rear end regulating member 43 disposed at the rear end (right end in FIG. 1) of the reverse rotation. The stacking tray 41 is provided with alignment means (not shown) for aligning the both side edges of the print sheet stored on the tray to a reference position (for example, center reference). With such a configuration, the printing sheets from the intermediate paper conveyance path 32 are sequentially stacked on the stacking tray 41 and are aligned in a bundle.

  Next, the conveyance path of each sheet will be described. In the casing 30, the carry-in path 31 having a carry-in port 31 a continuous with the paper discharge port 14 of the image forming apparatus A, and the cover-sheet conveyance path continuous with the carry-in path 31. 34 is arranged to traverse the device (both referred to as a transverse path). Further, an intermediate paper conveyance path 32 for guiding sheets to the stacking unit 40 (stacking tray 41) is connected to the carry-in path 31 via a path switching flapper 36, and a sheet from the carry-in entrance 31a is transported to the stacking tray 41. To do.

  On the other hand, the stacking tray 41 is provided with the bookbinding path 33 (referred to as a longitudinal path) for transporting a sheet bundle in a substantially vertical direction by longitudinally cutting the apparatus downstream. The longitudinal path formed by the bookbinding path 33 and the transverse path formed by the cover transport path 34 intersect each other, and a cover binding means 60 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 described above, and receives a print sheet from the image forming apparatus A. In this case, the image forming apparatus A carries out a print sheet (saddle stitching sheet) on which content information is printed and a print sheet (hereinafter referred to as a cover sheet) on which a title used as a cover is printed. Therefore, the carry-in path 31 is branched into a middle sheet conveyance path 32 and a cover sheet conveyance path 34, and each print sheet is distributed and conveyed to each path via a path switching flapper 36.

  On the other hand, an inserter device 26 (see FIG. 1) is connected to the carry-in path 31, and cover sheets that are not subjected to printing processing by the image forming apparatus A are separated one by one from the paper feed tray 26 a and supplied to the carry-in path 31. It is comprised so that it may do. The inserter device 26 is provided with one or a plurality of stages of paper feed trays 26a. A paper feed means for separating and feeding stacked sheets one by one at the front end of the tray, and a downstream side of the paper feed means. A paper feed path 27 is provided.

  Further, a transport roller 31b is disposed in the carry-in path 31, a transport roller 32b is disposed in the intermediate paper transport path 32, and a grip transport means 44 and a turntable unit 63 described later are disposed in the bookbinding path 33. A transport roller 34a is disposed in the cover transport path 34, and a paper discharge roller 35a is disposed in the paper discharge path 35, and is connected to a drive motor. A sheet sensor S1 is disposed in the carry-in path 31 and sheet sensors S2 and S3 and a paper discharge sensor S4 are disposed in the intermediate paper transport path 32. Sheet sensors S8 and S9 are disposed in the cover conveyance path 34, and sheet sensors S10 and S11 are disposed in the illustrated position in the sheet discharge path 35, respectively. Further, sheet sensors S12 and S13 are arranged in the bookbinding path 33, and a full detection sensor S14 is arranged in the storage stacker 67. Each of these sensors is configured to obtain a timing signal for controlling a subsequent operation at the same time as detecting a jam of a sheet passing through the path, and is connected to a control means described later.

  The above-described stacking tray 41 is connected to the intermediate paper transport path 32, and the bookbinding path 33 constituting the above-described longitudinal path is disposed on the downstream side of the above-described stacking tray 41. In the bookbinding path 33, the “stacking portion 40” in which the above-described stacking tray 41 is disposed, “adhesive application position E”, “cover binding position F”, “cutting position G”, and “housing portion H”. Are sequentially arranged on the downstream side. Then, an adhesive is applied to the sheet bundle stacked on the stacking tray 41 and bound to the cover sheet, and then the periphery thereof is cut (trimmed cut) and stored in the storage stacker 67. The above-mentioned cover sheet transport path 34 is arranged so as to intersect with the “cover sheet binding position F”, and a cover sheet is supplied to this position.

  At the “adhesive application position E” in the bookbinding path 33, an adhesive application means 55 is disposed. The adhesive application means 55 includes a glue container 56 that contains a heat-meltable adhesive, an application roller 57, and a roller rotation motor MR. The application roller 57 and the roller rotation motor MR are attached to the glue container 56. Built-in glue application unit. The glue application unit is supported so as to be able to reciprocate back and forth (front and back) in FIG. 2 along the longitudinal direction of the sheet bundle set at the adhesive application position E. Apply.

  In the bookbinding path 33, grip conveying means 44 for transferring sheets from the stacking tray 41 to the adhesive application position E is disposed. As shown in FIG. 3, the grip conveying means 44 deflects the sheet bundle stacked on the stacking tray 41 from a horizontal posture to a vertical posture, and the adhesive application position E along the bookbinding path 33 arranged in a substantially vertical direction. The sheet is conveyed and set. For this reason, the stacking tray 41 moves downward from the stacking position (solid line position in FIG. 2) to the transfer position (chain line position in FIG. 2), and at this transfer position D, the sheet bundle is transferred to the grip transfer means 44. After the sheet is moved in the direction of arrow a in FIG. 2, the sheet is turned 90 degrees in the direction of arrow b to deflect the sheet to a vertical posture.

  The grip conveying means 44 will be described. The gripper 45 includes a gripper 45 (a fixed side gripper 45a and a movable side gripper 45b) that grips a sheet bundle from both front and back sides, and a grip motor Mg that drives the gripper 45 in the nip direction. . The gripper 45 and the grip motor Mg are supported by a unit frame 46, and the unit frame 46 is supported by a device frame 47 so as to be pivotable by a rotation shaft 47a. The unit frame 46 is provided with a fan-shaped gear 46a, and is configured so that the entire unit is turned around the rotation shaft 47a by a turning motor MU supported by the apparatus frame 47.

S7 in the figure is a grip sensor for detecting that the gripper has gripped the sheet, and Sa in the figure is a thickness detection sensor for the sheet bundle. The grip sensor S7 is attached to the movable gripper 45b, and the thickness detection sensor Sa is attached to the subframe 48. The gripper 45 and the grip motor Mg move the sheet to the downstream side along the bookbinding path 33 in a state where the sheet bundle is gripped. Therefore, the subframe is supported by the unit frame 46 so as to be movable up and down in FIG. 48 is attached.
Accordingly, the grip conveying means 44 has a unit frame 46 pivotally supported by the apparatus frame 47 and a gripper 45 attached to a sub-frame 48 supported on the unit frame 46 so as to be movable up and down. The bundle can be deflected from the horizontal direction to the vertical direction (direction b as viewed in FIG. 2), and the sheet bundle can be moved up and down in the vertical direction. An MS shown in the figure is a lifting motor supported by the unit frame 46, and drives the pinion 49a to move the rack 48a of the subframe 48 in the vertical direction in FIG.

  A cover binding means 60 is disposed at the cover binding position F of the bookbinding path 33. The cover binding position F is arranged so that the above-described cover transport path 34 intersects, and a cover sheet is supplied from the cover cover transport path 34, and at the cover binding position F, from the cover sheet and the adhesive application position E The sheet bundle is bound and bound. For this reason, at the cover binding position F, there are provided a back support plate 61 for supporting the cover sheet as a backup, and a back folding plate 62 for press-molding a joint portion (back part) between the sheet bundle and the cover sheet. The back folding plate 62 constitutes a cover binding means 60. The back support plate 61 is provided with drive means (not shown) such as an electromagnetic solenoid so as to be able to advance and retreat in the bookbinding path 33, the back folding plate 62 is composed of a pair of left and right press pieces, and a drive motor (not shown) is provided. Is provided.

  In the bookbinding path 33, a cutting unit 64 is disposed at a cutting position G provided on the downstream side of the cover binding position F, and a turntable unit 63 is provided on the upstream side of the cover binding position F. The cutting unit 64 and the turntable unit 63 cut the top and bottom edges of the sheet bundle. For this reason, the turntable unit 63 is composed of a rotating plate 63a that can be moved forward and backward in the bookbinding path 33 in which the grip conveying means 44 is disposed, and a pressure member 63b that presses the sheet bundle against the rotating plate 63a. Motors Mt1 and Mt2 are installed and attached to the lifting unit 63c. The elevating unit 63c is attached to the apparatus frame to be movable up and down, and is connected to the shift motor MF by a timing belt. Accordingly, the turntable unit 63 deflects the sheet bundle from the grip conveying means 44 in the bookbinding path 33 in the vertical direction, and conveys and sets the lower edge of the sheet bundle at a cutting position G described later.

  The cutting unit 64 includes a cutting edge press member 65, a cutting blade 64a, and a blade receiving member 64b, and is disposed at a cutting position G, respectively. The blade receiving member 64b is disposed so as to face the cutting edge press member 65 and the cutting blade 64a via the sheet bundle, and is configured to be relatively strong. The cutting edge press member 65 is composed of a pressure plate 65a that is movable forward and backward with respect to the blade receiving member 64b and a press motor (not shown) that drives the pressure plate 65a forward and backward. Further, the cutting blade 64a is constituted by a flat blade-shaped cutter, and is moved by the cutter motor MC in the left-right direction in FIG. 2, and is configured to cut the sheet bundle when moving from the home position at the right end of the drawing in the left direction. Has been.

  Further, the control means for controlling the grip conveying means 44 transfers the sheet bundle from the stacking tray means 41 to the cutting position G and performs a cutting process, and then transfers the sheet bundle to the adhesive application position E. It is configured to apply glue. The configuration of the control means will be described below. FIG. 5 is a control block diagram. In a system in which the image forming apparatus A and the bookbinding apparatus B are connected as shown in FIG. 1, for example, a control CPU 70 provided in the image forming apparatus A. Are provided with a control panel 71 and mode setting means 72. A control CPU 75 is provided in the control unit of the bookbinding apparatus B, and the control CPU 75 calls a bookbinding process execution program from the ROM 76 and executes each process in the bookbinding path 33.

  In the above-described configuration, the present invention performs a registration operation for determining a cutting reference for a sheet bundle that is bound and bound at the cover binding position F with the cover sheet and the sheet bundle from the adhesive application position E at the cutting position G. When opening, the opening amount of the blade receiving member 64b and the cutting edge press member 65 is changed according to the information on the cover sheet (basis weight, eye direction, curl amount, etc.) as well as the thickness of the sheet bundle to be cut. It is characterized by being configured as

  Further, the control CPU 75 receives a post-processing mode instruction signal, a job end signal, sheet size information, and other information required for bookbinding and a command signal from the control CPU 70 of the image forming apparatus A. Therefore, the detection signals of the sheet sensors S1 to S14 described above are transmitted to the control CPU 75, and the control CPU 75 performs "stacking unit control unit 75a", "grip conveyance unit control unit 75b", "cutting unit control unit 75c", and "cover sheet conveyance control unit". 75d "," adhesive application means control section 75e "," cover binding means control section 75f ", and" cutting means control section 75g ". Then, the bookbinding process is executed according to the flowchart shown in FIG. 6 (A, B, C, D, E, F).

Next, the bookbinding processing operation by the control CPU 75 will be described with reference to the flowchart of FIG. 6 (A, B, C, D, E, F). The image forming conditions and the post-processing mode are set on the control panel 71 of the image forming apparatus A (St001). The post-processing mode is set to, for example, “print-out mode”, “bookbinding processing mode”, “steple mode”, “stamp mode”, “punch mode”, “jog mode”, or the like. In the printout mode, a sheet on which an image has been formed is carried out and stored in a paper discharge tray 37 (shown in the post-processing apparatus C) without bookbinding and post-processing.
In the bookbinding mode, sheets on which images are formed are aligned and collected, and are combined with the cover sheet and stored in the storage stacker 67. In the staple mode, the image-formed sheet is stapled by the staple unit provided in the post-processing apparatus C, the stamp mode performs the stamping process, the punch mode performs the punch process, and the jog mode performs the sorting process. The process is executed by the processing apparatus C, and then stored in the paper discharge tray 37.

  Therefore, when the “bookbinding mode” is selected as the post-processing mode, the image forming apparatus A executes an image forming operation and carries out the image-formed sheet to the paper discharge port 14 (St002). In the bookbinding apparatus B, the sheet is received in the carry-in path 31. At this time, the control CPU 75 positions the path switching flapper 36 in the state shown in FIG. 2 and guides the sheet to the intermediate sheet conveyance path 32 (St003). The sheet is sent to the paper discharge port 32a by the conveying roller 32b, and is sequentially stacked and stored on the stacking tray 41 (St004).

Therefore, upon receiving a job end signal (St005) from the image forming apparatus A, the control CPU 75 unloads the sheet bundle on the stacking tray 41 by the grip conveying means 44 and deflects the posture thereof by 90 degrees. As a result, the sheet bundle aligned on the stacking tray 41 is deflected from a horizontal posture to a vertical posture, and is transferred to the cutting position G on the downstream side through the bookbinding path 33 (St006). As shown in FIG. 4A (a), the grip conveying means 44 pulls out the sheet bundle in the horizontal posture from the stacking tray 41 in the direction a as shown in FIG. 2, and then turns the sheet bundle 90 degrees in the direction b as shown in FIG. To deflect in a vertical position. Thereafter, the grip conveying means 44 moves the sheet bundle to the cutting position G as shown in FIG. 4A (b). The grip conveying means 44 is turned by the turning motor MU, and moved to the cutting position G by the lifting motor MS. The moving amount of the lifting motor MS determines the cutting amount of the lower edge of the sheet bundle.
Then, the cutting edge press member 65 presses and supports the sheet bundle in the state of FIG. 4B (c), and the cutting blade 64a cuts the sheet bundle as shown in FIG. 4D in this state (St007). Next, the control CPU 75 retracts the cutting edge press member 65 and then reversely rotates the lifting motor MS of the grip conveying means 44 to move the sheet bundle backward to the upstream adhesive application position E in the state shown in FIG. (St008).

  The control CPU 75 feeds the cover sheet from the cover transport path 34 before and after the feeding set of the sheet bundle to the adhesive application position E (St009). This cover sheet may be supplied after being formed with an image from the image forming apparatus A or supplied from the inserter apparatus 26. When the sheet is fed from the inserter device 26, the control CPU 75 operates sheet feeding means (not shown) to separate the sheets one by one from the sheet feeding tray 26a and feed them to the sheet feeding path 27.

  The sheet sent to the paper feed path 27 is transported to the carry-in path 31 by a transport roller 27a. At this time, the control CPU 75 positions the path switching piece 28 in the state shown in FIG. 1 and guides it to the cover sheet transport path 34. The cover transport path 34 is provided with a registration mechanism 34b that corrects the posture of the sheet, and a sheet aligned by the registration mechanism 34b reaches a cover binding position F by being transported by a predetermined amount from this position, and is set stationary. (St009). Following the cover sheet feeding and setting, the control CPU 75 drives the adhesive application means 55 to apply the adhesive to the sheet bundle set at the adhesive application position E (St010). This state is shown in FIG. 4D (f). The glue container 56 provided with the application roller 57 moves along the lower edge of the sheet bundle in the front and back directions in the figure, and applies the adhesive impregnated on the roll surface to the sheet bundle. . At this time, since the lower end edge of the sheet bundle is trimmed and aligned, the lower end of the sheet is uniformly applied without shifting.

After completion of the adhesive application operation, the control CPU 75 transfers the sheet bundle to the downstream cover binding position F by the grip conveying means 44. Then, since a cover sheet is set at this position, as shown in FIG. 4D (g), the cover sheet is backed up to the back plate 61 and the sheet bundle is joined in an inverted T shape (St011). Next, in this state, the back folding plate 62 press-molds the back portion of the cover sheet as shown in FIG. 4E (h) and mounts the sheet bundle (St012). At this time, based on the cover information (basis weight, eye direction, curl amount, etc.) in any one of FIGS. 6D, 6E, and 6F, the time for pressing the back portion of the cover sheet may be changed.
In FIG. 6D, based on the basis weight information of the cover sheet acquired by the acquisition unit from the main device (St029), when the basis weight of the cover sheet is larger than a predetermined value (St030), the basis weight of the cover sheet Is longer than the predetermined value (St031), the time for press forming the back portion of the cover sheet is increased.

  Also, in FIG. 6E, based on the information on the eye direction of the cover sheet input by the operator through the main unit (St032), when the cover sheet is vertical (St033), the cover sheet is horizontal (St034). The time for press-molding the back portion of the cover sheet is made longer than in the above case.

  In FIG. 6F, based on the curl information of the cover sheet input by the operator through the main unit (St035), when the curl amount of the cover sheet is large (St036), the curl amount of the cover sheet is small (St036). The time for press-molding the back portion of the cover sheet is made longer than St037).

After the above surface mounting process, the control CPU 75 releases the grip conveying means 44 from the sheet bundle and moves it back to the initial position (the state shown in FIG. 4A (a)). At this time, the cutting blade 64a is positioned at the cutting position, and receives the falling sheet bundle (see FIG. 4E (i)) (St013). In this state, the turntable unit 63 is moved from the standby position to the sheet gripping position, and the sheet bundle is nipped by the rotating disk 63a and the pressure member 63b. Next, after moving the cutting blade 64a to the standby position, the control CPU 75 turns the turntable 63a and the pressure member 63b by 90 degrees to deflect the top of the sheet bundle to the lower end (St014). Therefore, as shown in FIG. 4F (j), the sheet bundle is pressed and held by the cutting edge press member 65 (St018). At this time, based on the cover information (basis weight, eye direction, curl amount, etc.) of any of FIGS. 6A, 6B, and 6C, the blade receiving member 64b that receives the sheet bundle by the moving means and the cutting edge press member 65. Is moved relatively.
In FIG. 6A, before the sheet bundle is pressed and held by the cutting edge press member 65, the basis weight of the cover sheet is determined based on the basis weight information of the cover sheet acquired by the acquisition unit from the main body device (St015). Is larger (St016), the opening amounts of the blade receiving member 64b and the cutting edge press member 65 are made wider than when the basis weight of the cover sheet is not more than a predetermined value (St017).
Thereafter, the sheet bundle is pressed and held by the cutting edge press member 65 (St018), and a predetermined amount is cut by the cutting blade 64a (St019).

Also, in FIG. 6B, before the sheet bundle is pressed and held by the cutting edge press member 65, the cover sheet is a vertical sheet based on the information on the eye direction of the cover sheet input by the operator through the main unit (St023). In the case (St024), the opening amounts of the blade receiving member 64b and the cutting edge press member 65 are made wider than in the case where the cover sheet is a horizontal sheet (St025).
Thereafter, the sheet bundle is pressed and held by the cutting edge press member 65 (St018), and a predetermined amount is cut by the cutting blade 64a (St019).

In FIG. 6C, the curl amount of the cover sheet is large based on the curl information of the cover sheet input by the operator through the main body device before the sheet bundle is pressed and held by the cutting edge press member 65 (St026). In (St027), the opening amounts of the blade receiving member 64b and the cutting edge press member 65 are made wider than in the case where the curl amount of the cover sheet is small (St028).
Thereafter, the sheet bundle is pressed and held by the cutting edge press member 65 (St018), and a predetermined amount is cut by the cutting blade 64a (St019).

  Next, after retracting the cutting edge press member 65 to the standby position, the control CPU 75 turns the sheet bundle by 180 degrees as shown in FIG. 4F (k), and deflects the posture so that the ground portion becomes the lower end. In the state of j), the lower end portion is cut. Next, the control CPU 75 similarly retracts the cutting edge press member 65 to the standby position, and then turns the sheet bundle by 90 degrees to deflect the posture so that the fore edge becomes the lower end, and cuts the lower end (St020). After cutting and aligning the peripheral edge of the sheet bundle in this way, the control CPU 75 releases the sheet grip of the turntable unit 63 and delivers the cut sheet bundle to the carry-out roller 66 (St021). The carry-out roller 66 carries the sheet bundle into the storage stacker 67 for storage (St022). At this time, the control CPU 75 moves and retracts the sweeper means 69 to the position of the chain line in FIG.

Next, the apparatus shown in FIG. 7 differs from the embodiment shown in FIG. 2 in that the apparatus shown in FIG. 2 described above arranges the cutting position G in the bookbinding path 33 downstream of the cover binding position F. Is a case where the cutting position G is arranged on the upstream side of the glue application position E. The same components as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted. In the bookbinding path 33, grip conveying means 44 is arranged in the same manner as described above. A turntable unit 63 and a cutting means (cutting unit) 64 are disposed on the downstream side of the grip conveying means 44, and an adhesive application means 55 is disposed on the downstream side thereof.
Accordingly, the sheet from the stacking tray 41 is deflected from the horizontal posture to the vertical posture by the grip conveying means 44 and transferred to the cutting position G by the grip conveying means 44. At the cutting position G, the sheet is cut by a predetermined amount at the lower edge while being pressed and held by the cutting edge press member 65. Thereafter, the cut sheet bundle is transferred and set to the adhesive application position E by the grip conveying means 44. Therefore, an adhesive is applied by the application roller 57. At this time, since the lower end edge of the sheet bundle is trimmed and aligned, the adhesive is uniformly applied. After that, the sheet bundle is joined to the cover sheet and subjected to a back folding process, and the peripheral edge except for the back cover part is cut by the cutting means 64 and stored in the storage stacker 67. It is the same as the apparatus of FIG.

A Image forming apparatus B Bookbinding apparatus C Post-processing apparatus E Adhesive application position F Cover binding position G Cutting position 26 Inserter apparatus 31 Loading path (crossing path)
32 Medium paper transport path 33 Bookbinding path (longitudinal path)
34 Cover transport route (crossing path)
35 Paper discharge path 36 Path switching flapper 37 Paper discharge tray 40 Stack unit 41 Stack tray 44 Grip transport means 45 Gripper 55 Adhesive application means 57 Application roller 60 Cover binding means 61 Back plate 62 Back folding plate 63 Turntable unit 63a Rotation Panel 63b Pressure member 64 Cutting means (cutting unit)
64a cutting blade 65 cutting edge press member 67 storage stacker 69 sweeper means 70 control CPU (image forming apparatus)
75 Control CPU (bookbinding device)
76 ROM

Claims (6)

Stacking tray means for sequentially stacking and aligning sheets;
An adhesive application means for applying an adhesive to the sheet bundle back end surface from the stacking tray means;
A cover binding means for binding a cover sheet to a sheet bundle to which an adhesive is applied by the adhesive application means;
Obtaining means for obtaining basis weight information of the cover sheet;
Back folding means for performing a back folding process on the sheet bundle in which the cover sheets are bound together by the cover binding means;
Conveying means for conveying a back-folded sheet bundle by the back folding means;
Cutting means for cutting the sheet bundle conveyed by the conveying means;
With
The cutting means cuts a cutting edge press member that presses the sheet bundle between the blade receiving member and the blade receiving member, and an end portion of the sheet bundle pressed by the blade receiving member and the cutting edge press member. A cutting blade, and a moving means for relatively moving the blade receiving member and the cutting edge press member,
The bookbinding apparatus, wherein the cutting unit includes a control unit that controls the moving unit according to a basis weight of the cover sheet acquired by the acquiring unit. When the basis weight of the cover sheet acquired by the acquisition unit is larger than a predetermined value, the control unit sets the opening amount of the moving unit more than when the basis weight of the cover sheet is equal to or less than the predetermined value. The bookbinding apparatus according to claim 1, wherein the bookbinding apparatus is widened. 2. The bookbinding apparatus according to claim 1, wherein when the cover sheet is a vertical sheet, the control unit widens the opening of the moving unit than when the cover sheet is a horizontal sheet. Stacking tray means for sequentially stacking and aligning sheets;
An adhesive application means for applying an adhesive to the sheet bundle back end surface from the stacking tray means;
A cover binding means for binding a cover sheet to a sheet bundle to which an adhesive is applied by the adhesive application means;
Obtaining means for obtaining basis weight information of the cover sheet;
Back folding means for performing a back folding process on the sheet bundle in which the cover sheets are bound together by the cover binding means;
Conveying means for conveying a back-folded sheet bundle by the back folding means;
Cutting means for cutting the sheet bundle conveyed by the conveying means;
With
The bookbinding apparatus, wherein the back folding means includes control means for controlling a time for performing the back folding process of the back folding means according to the basis weight of the cover sheet acquired by the acquiring means. When the basis weight of the cover sheet acquired by the acquisition unit is greater than a predetermined value, the control unit is more effective than the case where the basis weight of the cover sheet is equal to or less than the predetermined value. 5. The bookbinding apparatus according to claim 4, wherein a time for performing the back folding process is increased. 5. The bookbinding apparatus according to claim 4, wherein when the cover sheet is vertical, the control unit makes the back folding process time of the back folding unit longer than when the cover sheet is horizontal. .