JP2015230430A - Sheet binding processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet binding processing device capable of carrying out sheet bundling from a position to bundle the sheet in a reliably bundled state without being peeled when a plurality of superposed sheets is processed into crimp binding by a pair of compression members and moved in a predetermined direction.SOLUTION: When a sheet bundle mounted on support means is compressed by a pair of compression surfaces and bundled by crimping the sheet together, a coating layer is fitted to a bundling position of the sheet abutted to a compression surface and pressurized. A sheet binding processing device includes: the support means for supporting the sheet bundle in a state that a plurality of sheets is superposed; sheet bundling means for mutually crimping the sheets by compressing the sheet bundle on the support means by the pair of compression surfaces; coating means for fitting the coating layer to the sheet arranged in a supply part for supplying the sheet to the support means; and control means for controlling the coating means.

Description

  The present invention relates to a sheet binding processing apparatus that binds an image-formed sheet, and relates to an improvement of a binding mechanism that binds a plurality of sheets.

  2. Description of the Related Art Conventionally, an apparatus that binds sheets stacked in a bundle is known as a post-processing apparatus of an image forming apparatus or a stationery binding tool (stationery). As the binding mechanism, there are known a staple binding mechanism that stacks sheets in a bundle and binds them with staple needles, and a pressure binding mechanism that presses the sheets together with a pair of pressure members and binds them together.

  As for the former staple binding mechanism, there is known a structure in which a linear metal needle is bent into a U-shape and inserted into a sheet bundle, and the leading end thereof is bent and bound. A later-described pressure binding mechanism has a structure in which a sheet bundle is pressure-bonded by a pair of pressing members having concave and convex tooth-shaped pressure surfaces that mesh with each other, and is bound.

  For example, Patent Document 1 discloses a post-processing apparatus that includes a crimping binding mechanism. This document proposes a binding mechanism that performs binding processing by pinching a sheet bundle with a pair of pressure members. That is, a pair of pressure members having tooth-shaped pressure surfaces meshing with each other are pressed against each other by deforming the sheets into a wave shape by sandwiching the sheet bundle with the drive cam. Patent Document 2 also discloses a mechanism for holding and binding a sheet bundle with a similar tooth-shaped pressing surface. In the same document, it is also proposed to vary the pressing force according to the thickness of the sheet bundle.

JP 2012-47940 A JP 2010-274623 A

  As described above, a mechanism is already known in which a plurality of stacked sheets are clamped and pressed by a pressing member having a shape (tooth shape) that meshes with each other. Strong binding can be achieved if the pressing force is increased with such a binding device and the concave and convex surfaces to be engaged are formed deeply. Conversely, if the pressing force is weak and the concave and convex surfaces are shallow, the binding is easy to peel off. Is also known.

  Accordingly, in the case of crimp binding, the binding document is required to have a binding force that can be removed when a strong force is applied to separate the bound document when turning the page.

  In such crimp binding, the sheet bundle is pinched and bound by a pair of pressure surfaces, and then the pressure surface is separated from the sheet bundle, and then the sheet bundle is conveyed from the binding position in the carry-out direction. At this time, when the pressure surface and the sheet bundle are in close contact with each other and are not separated from each other, there arises a problem that the pressure-bonding portion is stretched by a conveying force acting on the sheet and the sheet is separated and separated.

  If the pressing surface after pressurization is not completely separated from the sheet bundle (a state where one pressing surface and the sheet bundle are in close contact), a binding processing error is caused. The present inventor investigates that such a phenomenon that the pressure surface and the sheet bundle are in close contact with each other and difficult to peel off is caused by the fiber component of the sheet entering (tangling) the pressure surface (surface roughness). It came.

  In the present invention, when a plurality of overlapped sheets are subjected to pressure binding processing with a pair of pressure members and transferred in a predetermined direction, the bound sheet bundle is securely peeled from the binding position without being peeled off. An object of the present invention is to provide a sheet binding processing apparatus that can be carried out.

  In order to achieve the above object, the present invention provides a coating layer at a binding position of a sheet that comes into contact with the pressing surface when the sheet bundle placed on the supporting means is pressed by a pair of pressing surfaces and the sheets are pressed and bonded together. It is characterized by attaching and pressurizing.

  Further, the configuration will be described in detail. A supporting means for supporting a plurality of sheets in a stacked state, a sheet binding means for pressing the sheet bundle on the supporting means with a pair of pressing surfaces, and pressing the sheets together, and supporting A coating unit disposed in a supply unit for supplying the sheet to the unit and attaching a coating layer to the sheet; and a control unit for controlling the coating unit.

  The control means is configured to form a coating layer at the binding position of the sheet that contacts at least one of the pressing surfaces.

  The coating layer is formed on one or both of the front cover surface and the back cover surface of the sheet bundle in a blank area (binding margin area) located outside the image area, and overlapping sheets other than the front and back cover surfaces are formed on each other. A coating layer is not formed on the contact surface.

  According to the present invention, a coating layer is attached to a sheet binding position that abuts against the pressing surfaces of a pair of pressure members in a bundled sheet supply unit to be bound, and then the sheet is subjected to binding processing by narrowing the pressure on the pressing surface. The following effects are achieved.

  Since the coating layer is formed on the sheet that engages with the pressing surface, the fiber component that appears on the surface of the sheet does not enter the concavo-convex portion (surface roughness) of the pressing surface and become entangled. Therefore, when the pressing surface is pulled away from the sheet surface after the binding process, the sheet bundle does not come into close contact with the sheet surface, so that the binding portion does not loosen even if a conveying force is applied to carry out the sheet bundle from the binding position. .

  Therefore, the coating layer is formed of a material that is easily peeled off from the pressure surface (for example, a thin film material having a surface roughness higher than that of the sheet surface, such as phenol resin powder). As a result, even if the pressing surface has a rough surface, the sheet surface does not come into contact with the pressing surface, so that the fiber component does not entangle with the pressing surface. Accordingly, the processed surface can be reliably separated from the surface after pressing the sheet bundle.

  Further, by forming the coating layer with a hardened material from the surface of the sheet, the coating layer is deformed more strongly than the sheet under the pressing action of the pressing surface and maintains its shape, so that reliable binding is possible.

1 is an explanatory diagram of an image forming apparatus including a sheet binding processing apparatus according to the present invention. FIG. 3 is an explanatory diagram illustrating a configuration of a sheet binding processing device according to the present invention. Explanatory drawing of the binding process part (processing tray) in the apparatus of FIG. 4A and 4B are explanatory diagrams of sheet binding processing operations in the processing tray of FIG. 3, in which FIG. 3A illustrates a state in which sheets are stacked on the tray, FIG. 3B illustrates a state in which the stacked sheet bundle is transferred to a binding position, and FIG. Is a state where the sheet bundle at the binding position is bound, (d) is a state where the sheet bundle is moved from the binding position to the stacking position, and (e) is a state where the sheet bundle after the binding process is moved in the paper discharge direction. FIGS. 3A and 3B are explanatory diagrams of a binding unit arranged in the processing tray of FIG. 2, in which FIG. 3A illustrates a configuration of a staple binding unit, and FIG. 3B illustrates a configuration of a sheet press binding unit. It is explanatory drawing of the structure of the pressurization surface in a sheet | seat crimping | compression-bonding means, (a) is the shape of a pressurization surface, (b) is the shape of the sheet bundle after a binding process, (c) is a pressurization surface after a binding process. A state where the sheet is separated from the sheet bundle is shown. The structure of the coating means in the apparatus of FIG. 2 is shown, (a) shows the first embodiment, and (b) shows the second embodiment. Explanatory drawing which shows the state which coated the sheet | seat bundle with the coating means of FIG. FIG. 2 is an explanatory diagram of a control configuration in the image forming system of FIG. 1. FIG. 3 is an explanatory diagram illustrating a procedure of a binding process operation in the image forming system of FIG. 1.

[Image forming apparatus]
As shown in FIG. 1, the image forming apparatus A includes a paper feed unit 1, an image forming unit 2, a paper discharge unit 3, a post-processing unit 15, and a control unit (not shown) built in the apparatus housing 4. It consists of

The sheet feeding unit 1 is composed of a sheet feeding cassette 5 for storing sheets. In the illustrated example, cassettes 5a to 5c for storing a plurality of sheets of different sizes are detachably mounted on a housing.
The image forming unit 2 includes a printing machine mechanism that forms an image on a sheet sent from the paper feeding unit 1, and includes various mechanisms such as an electrostatic printing machine mechanism, an offset printing machine mechanism, an ink jet printing machine mechanism, and a ribbon transfer printing mechanism. The mechanism is known.

  The illustrated image forming unit 2 represents an electrostatic printer, and a print head 10, a developing device 11, a cleaner 8, and the like are disposed around the photosensitive drum 9. Then, a latent image is formed on the photosensitive drum by the print head 10 (laser beam emitter or the like) according to the image data stored in the data processing unit (not shown), and toner ink is attached by the developing unit 11. In the illustrated mechanism, photosensitive drums 9a to 9d are arranged for each color of YMCK for color image formation. Then, the composite image is transferred to the transfer belt 12, and the image is transferred to the sheet by the transfer charger 13.

  The sheet on which the image is formed in this manner is carried out from the paper discharge port 16 via the paper discharge path 17. The apparatus housing 4 is provided with a paper discharge area 6 in which the post-processing apparatus B is incorporated as a unit.

  In the illustrated apparatus, a scanner unit C for sending image data to the image forming apparatus A is integrally attached to the apparatus housing 4. The scanner unit C optically reads an image original set on a platen with a photoelectric conversion element. D in the drawing is a document feeder for feeding a document image to the platen 19 of the scanner unit C.

[Post-processing equipment]
The post-processing apparatus B (sheet binding processing apparatus; the same applies hereinafter) is incorporated in the paper discharge area 6 formed in the image forming apparatus A (inner finisher structure) as shown in detail in FIG. In the apparatus housing 4 formed in an appropriate shape, a sheet conveyance path 22 connected to the sheet discharge port 16 of the image forming apparatus A is disposed, and a sheet on which an image is formed from a path inlet 21 (referred to as a carry-in inlet) is a downstream path. Guide to exit 23 (referred to as paper discharge port). A processing tray (support means; the same applies hereinafter) 24 for stacking and accumulating sheets sent from the sheet discharge outlet 23 is disposed on the downstream side of the sheet conveyance path 22.

  A conveyance roller for conveying the sheet is disposed in the sheet conveyance path 22 and is connected to a drive motor (not shown). In the sheet conveyance path 22, an inlet sensor Se1 is disposed on the inlet side, and a paper discharge sensor Se2 is disposed on the outlet side, and detects the leading and trailing edges of the sheet.

  The processing tray 24 is disposed on the downstream side of the paper discharge port 23 so as to form a step, and includes a tray surface (paper mounting surface) for storing the sheets conveyed to the paper discharge port 23 in a stack. A rear end regulating stopper 27 that regulates the rear end of the sheet by abutting and a side aligning unit 30 that positions the posture in the width direction of the sheet (the direction perpendicular to the sheet discharge) are disposed on the sheet placement surface.

  In addition, a conveyance rotation body 36 (paddle member) that reverses the conveyance direction of the discharged sheet is disposed at the paper discharge port 23 and is connected to a drive motor so as to apply a conveyance force in the direction opposite to the conveyance direction to the sheet. ing. The transport rotator 36 is attached to a bracket that can be lifted and lowered, and the bracket is provided with a lifting motor (not shown). Therefore, the control means 65 to be described later waits the bracket in the raised position until the leading edge of the sheet carried out from the paper discharge port 23 passes through the conveying rotator 36, and moves the conveying rotator to a position where it engages with the sheet after passing the sheet. 36 is lowered.

  On the paper loading surface of the processing tray 24, a scraping rotator 33 for guiding the rear end portion of the sheet to the restriction stopper 27 is disposed. The illustrated scraping rotator 33 is composed of a ring-shaped belt member, and moves up and down in the stacking direction following its stacking height by its own weight.

The side aligning means 30 is composed of a pair of plate members that can move in the width direction (paper discharge orthogonal direction) along the paper placement surface, and the sheet is aligned on a reference line (sheet center or one side sheet side) by an alignment motor (not shown). Align.

  In such a configuration, a sheet on which an image is formed by the image forming apparatus A is guided from the sheet discharge port 16 to the sheet conveyance path 22 and is guided from the path sheet discharge port 23 to the processing tray 24. Then, based on the signal detected by the sheet discharge sensor Se2 at the trailing edge of the sheet, the conveyance rotating body 36 is engaged with the sheet to reverse the sheet conveyance direction. The trailing edge of the sheet moves on the processing tray 24 in the direction opposite to the sheet discharge, and is abutted and locked to the trailing edge regulating stopper 27. This sheet is aligned with the reference position on the tray by the side aligning means 30. By repeating this operation, the sheets are stacked on the tray.

  FIG. 3 shows a planar configuration of the processing tray 24, and the sheet is conveyed from the sheet conveying path 22 in the direction of the arrow in the figure and supported by the processing tray 24 and the stack tray 25. In the processing tray 24, staple binding means 26 and crimp binding means 28 are arranged. As shown in the figure, the staple binding means 26 is supported by a guide rail (not shown) so as to be movable along the trailing edge of the sheet, and performs binding processing at a plurality of locations (two locations, three locations, or corners) of the sheet. It is configured to apply. The crimp binding means 28 is arranged at the sheet corner as shown in the figure, and binds the sheet bundle by a binding mechanism described later.

[Stapler unit]
The staple binding means 26 is already widely known as an apparatus for performing a binding process with a staple needle. One example will be described with reference to FIG. The staple binding unit 26 is configured as a unit separate from the sheet binding processing apparatus B (post-processing apparatus). A box-shaped unit frame 26a, a drive cam 26d that is pivotally supported by the frame, and a drive motor M that rotates the drive cam 26d are mounted on the frame.

  In the drive cam 26d, a staple head (head portion) 26b and an anvil member 26c are disposed opposite to the binding position, and the staple head is biased to the drive cam by an urging spring (not shown) from the upper standby position to the lower staple position ( The anvil member moves up and down. A needle cartridge 31 is detachably attached to the unit frame 26a.

  The needle cartridge 35 stores linear blank needles and supplies the needles to the head portion 26b by a needle feed mechanism. The head portion 26b incorporates a former member that bends the straight needle into a U shape and a driver that press-fits the bent needle into the sheet bundle. With such a configuration, the drive cam 26d is rotated by the drive motor M and stored in the urging spring. When the rotation angle reaches a predetermined angle, the head portion 26b moves downward toward the anvil member 26c. With this operation, the staple is folded into a U-shape and inserted into the sheet bundle with a screwdriver. The leading end is bent by the anvil member 26c and stapled.

  A needle feed mechanism is built in between the needle cartridge 31 and the head portion 26b, and a sensor (empty sensor) for detecting the absence of the needle is disposed in the needle feed portion. Alternatively, a cartridge sensor (not shown) for detecting whether or not the needle cartridge 31 is inserted is disposed in the unit frame 26a.

  The illustrated needle cartridge 31 employs a structure in which staple needles connected in a strip shape to a box-shaped cartridge are stacked and stored, and a structure in which the staple needles are stored in a roll shape.

  The unit frame 26a is provided with a circuit for controlling the above-described sensors and a circuit board for controlling the drive motor M, and issues a warning signal when the staple cartridge 31 is empty when the staple cartridge 31 is not accommodated. It has become. The staple control circuit controls the drive motor to execute a stapling operation in response to a staple needle signal, and when the staple head moves from the standby position to the anvil position and returns to the standby position, the “operation end signal”. Is configured to transmit.

[Crimping binding mechanism]
The configuration of the crimp binding means 28 will be described with reference to FIG. The press binding means 28 is constituted by pressing members 29a and 29b having a pair of pressing surfaces 28a and 28b that are pressed against and separated from each other.

  In FIG. 5B, the fixed pressure member 29a is fixed to the apparatus frame. A movable pressure member 29b is pivotally coupled to the fixed pressure member 29a so as to be swingable by a support shaft 29x. The fixed pressure member 29a is integrally attached with a fixed pressure surface 28a, and the movable pressure member 29b is integrally attached with a movable pressure surface 28b.

  The fixed pressurizing surface 28a and the movable pressurizing surface 28b are arranged so as to face each other, and are formed by tooth-shaped uneven surfaces that mesh with each other. The movable pressure member 29b is configured to be swingable about the support shaft 29x with respect to the fixed pressure member 29a fixed to the apparatus frame, and an urging spring (not shown) (a winding spring wound around the support shaft 29x). ), The pressurizing surfaces 28a (28b) are urged away from each other.

  A drive cam 32a is rotatably supported on the fixed pressure member 29a, and a follower roller 32b disposed on the movable pressure member 29b is engaged with the cam surface. A drive motor M2 is connected to the drive cam 32a via a speed reduction mechanism, and the drive cam 32a is rotated by the rotation of the motor, and a movable pressurizing member via a follower roller 32b on the cam surface (the illustrated eccentric cam). 28b is configured to swing.

  Accordingly, the movable pressurizing surface 28b is moved from the standby position separated from the fixed pressurizing surface 28a to the operating position in press contact with the rotation of the drive motor M2 to pressurize the sheet bundle. After the sheet bundle is pressed and deformed by the uneven surfaces that mesh with each other, the movable pressing member 29b returns to the standby position by the action of the biasing spring.

  As shown in the enlarged view of FIG. 5 (b), the movable pressure surface 28b and the fixed pressure surface 28a are formed with protrusions on one side and recessed grooves that match the protrusions on the other side. The protrusions and the recessed grooves are formed in a rib shape having a predetermined length. Therefore, the sheet bundle sandwiched between the movable pressure surface 28b and the fixed pressure surface 28a is deformed into a corrugated plate shape and is brought into close contact therewith. A position sensor (not shown) is disposed on the movable pressure member 29b, and detects whether the pressure surfaces 28a and 28b are at a pressure position or a separated position (standby position).

[Stack tray]
On the downstream side of the processing tray 24, a stack tray 25 for storing the bundle of sheets that have been bound is disposed. The stack tray is supported on a guide rail (not shown) so as to be movable up and down in the stacking direction on the apparatus frame, and is moved in the stacking direction (vertical direction in FIG. 2) by the rotation of the lifting motor. The stack tray is provided with a level sensor for detecting the amount of sheets stacked and a sheet presence / absence sensor for detecting whether or not a sheet is present on the tray.

[Coating mechanism]
The present invention coats the binding position of the sheet surface that is engaged with at least one of the fixed pressure surface 28a and the movable pressure surface 28b when the above-described pressure binding means 28 binds the sheet bundle on the processing tray 24. The means 40 is arranged in a supply unit for supplying sheets to the processing tray 24. The configuration will be described below.

  The reason for coating the sheet surface in contact with the pressing surface 28a (28b) when the sheet bundle is crimped and bound will be described. When the sheet to be bound is a fiber material (paper material or the like), the fiber component covers the surface, so that the fiber component is entangled with the surface roughness (fine irregularities) of the pressure surface 28a (28b) and the sheet bundle is formed. The problem of not peeling off from the pressing surface occurs.

  That is, after the sheet bundle is pressed and bound by the press-separating operation of the pair of pressing surfaces 28a and 28b, the pressing surface needs to move away from the sheet bundle and move the sheet bundle downstream. At this time, if the pressure surfaces 28a and 28b and the sheet bundle are pressure-bonded, the pressure-bonding portion between the sheets may be separated (peeled) by the conveying force applied to the sheet bundle.

[Coating means]
“First Embodiment”
The structure of the coating means 40 shown to Fig.7 (a) is demonstrated. In the sheet conveyance path 22, a conveyance roller 49 and a conveyance guide 41 that convey a sheet are disposed on the downstream side of the entrance sensor Se <b> 1. Has been placed. A coating means 40 for forming a coating layer Co on a sheet that moves to a position facing the platen roller 42 across the sheet conveyance path 22 is disposed.

  The coating means 40 shown in the figure transfers a coating agent having a predetermined shape (for example, an organic solvent such as methylcyclohexane) to the surface of the sheet passing therethrough. In the mechanism, a supply spool 44 and a take-up spool 45 are rotatably supported on a unit frame 43. A film 46 obtained by attaching a coating agent layer to a base film is wound around the supply spool 44 in a roll shape.

  The leading end of the film 46 is fixed to the take-up spool 45 via a head portion 47 that faces the platen roller 42. Accordingly, the coating film 46 is wound around the take-up spool 45 from the supply spool 44 via the head portion 47.

  The unit frame 43 is supported by the apparatus frame so as to be movable in a direction in which it is pressed and separated from the platen roller 42. In the illustrated apparatus, a guide rail 48 is provided on the apparatus frame, and the unit frame 43 moves up and down along the rail. In the unit frame 43, a shift motor M3 and a rack and pinion mechanism 49 are arranged.

  The unit frame 43 is configured to be movable in the conveyance orthogonal direction with respect to the sheet conveyance path 22 and its mechanism is not shown, but for example, a bracket that supports the unit frame 43 is disposed on the apparatus frame, and this bracket is Mount to slide with guide rails. The position of the unit frame 43 can be moved in the conveyance orthogonal direction of the conveyance path by shift means such as a motor and a rotary solenoid.

  With this configuration, the coating unit 40 can form a coating layer at an arbitrary dimension position from the edge of the sheet moving on the sheet conveyance path 22.

“Second Embodiment”
The coating means 50 shown in FIG. 7B shows a case where a coating layer is formed on a sheet moving on the sheet conveyance path 22 by a stamp mechanism. Similar to the first embodiment, a conveyance guide 41, a platen roller 42, and a conveyance roller 49 are arranged in the sheet conveyance path 22. A stamp unit 50 is disposed at a position facing the platen roller 42. The stamp unit 50 includes a stamp body 51, a stamp roll 52, and an ink pad 53.

  The stamp main body 51 is supported by the apparatus frame so as to be movable up and down, and is moved up and down between a position where it is engaged with a sheet in the sheet conveyance path by a driving means (not shown) and a retracted standby position. The stamp roll 52 is built in the stamp main body 51 and is composed of a roller body (sponge, porous elastomer, etc.) having impregnation properties.

The ink pad 53 is
The stamp body 51 is swingably supported, and a pad impregnated with ink is accommodated at the tip thereof. When the stamp main body 51 moves from the standby position to the operating position, the stamp pad 53 swings from a position engaging the stamp roll 52 (solid line in the figure) to a standby position (dotted line in the figure).

  The coating layer Co formed by the coating means 40 (50) is formed of a material having a high surface curability (ink property) or a material having a good peelability (ink property). The component of the coating layer Co formed by the coating means 40 (50) uses a liquid as the powder having a higher hardness than the sheet (paper material). For example, it may be formed of a material having the same effect as that of a laser printer toner or an ink jet printer ink.

  For the peelability of the coating layer Co, a material that is difficult to adhere to the pressure surface (usually formed of a metal material or a resin material) is selected as compared with the sheet. Since the sheet is fibrous, the fiber component protrudes from the surface, and the coating layer prevents this from entering and attaching to the uneven surface (surface roughness) of the pressing surface. Accordingly, the coating ink selects the optimum material for coating the fiber component of the sheet.

[Description of control configuration]
A control configuration in the image forming system of FIG. 1 will be described with reference to FIG. The illustrated system includes a control unit 60 of the image forming apparatus A and a control unit 65 of the post-processing apparatus B, each of which includes a CPU. The control unit 60 of the image forming apparatus A includes an image data control unit 61, a print control unit 62, a paper feed control unit 63, and an input unit 64.

  The image data control unit 61 controls a storage device for image data sent from the scanner unit C or image data transferred from the outside. The print control unit 62 develops image data sent from a storage device (such as an HDD) in a print head control memory, and electrically controls the print head 10 (laser emitter, thermal head, inkjet head, etc.). The paper feed control unit 63 feeds a sheet of a specified size from the paper feed cassette 5 to the image forming unit 2 through a paper feed path. The input unit 64 is configured by a control panel or the like, and an operator performs image forming conditions or post-processing conditions (mode setting).

  The control unit 65 of the post-processing apparatus B includes a CPU that executes a control program and storage means (ROM 66 and RAM 67). The control program includes a conveyance control unit 68 that conveys the sheet from the carry-in entrance 21 to the processing tray 24, a coating control unit 69 that controls the coating means 40 (50), and a sheet accumulation control that accumulates the sheets on the processing tray. , A binding processing control unit 71, and a paper discharge control unit 72 that conveys the post-processed sheets to the stack tray 25 on the downstream side.

  The coating control unit 69 is configured to form the coating layer Co1 at the binding position of the front cover (first sheet) of the sheets stacked on the processing tray, and to coat the binding position of the front cover and the back cover (last sheet). One of the configurations for forming the layer Co2 is set.

  Then, control is performed so that the coating layer Co1 (Co2) is formed at the binding position of the first sheet and / or the last sheet of the sheet passing through the sheet conveyance path 22, and the coating layer is not formed at the binding position of other sheets. To do. That is, as shown in FIG. 8, they are stacked and stacked in the order of sheet pages. At this time, the coating layer Co1 is formed at the binding position of the sheet serving as the cover. The coating layers Co1 and Co2 are formed on the surface in contact with the pressing surfaces 28a and 28b to be bound at the binding position of the sheet serving as the front cover and / or the binding position of the sheet serving as the back cover.

  The coating control unit 69 forms the coating layer Co in a blank area located outside the image area of the sheet. For this reason, “information relating to the binding position by the crimping binding unit 28” and “sheet movement amount information in the sheet conveyance path 22” are transferred to the coating control unit 69. For example, as the position information, the binding position (initial setting value) of the sheet corner is stored in advance in the RAM 67 or the like. The movement amount information is calculated from the detection signal from the inlet sensor Se1 and the motor rotation amount of the conveying means (conveying roller).

  The coating control unit 69 uses the above-described coating means 40 (50) when the sheet movement amount reaches the platen position of the coating means 40 (50) based on the signal detected by the inlet sensor Se1. ).

  In this way, the control means 65 is configured to form the coating layer Co at a predetermined position of the preset sheet corner. In addition, the control means 65 can be configured to form the coating layer Co according to the binding position set by the operator.

  A coating layer Co1 (Co2) is formed on one or both of the binding positions of the cover sheet and the back cover sheet. For example, when the feature (ink quality material) of the coating layer is relatively close to the pressure members 29a and 29b, the coating layers Co1 and Co2 are formed on both the front and back surfaces. Further, in the case where the means 34 (spring member or the like) for separating the sheet is disposed on one of the pair of pressure members 29a and 29b, the coating layer Co is formed on the cover sheet surface in contact with the other pressure member that is not disposed. .

  In addition, the coating layer Co is not formed on the overlapping surfaces of the intermediate sheets that are stacked and arranged in the page order and are bound. This is because when the pressure members 29a and 29b are pressed during the post-processing operation, the fiber layer protruding from the overlapping sheet surface is intertwined and bonded at the binding position of the overlapping sheets so that the coating layer Co suppresses the fiber component from protruding. It is.

  In the present invention, the sheets of the stacked sheet bundle are coated on the front cover surface and the back cover surface (both or one), and the fiber component protrudes and sticks into the concave portion of the pressure surface (surface roughness). To prevent. Then, by not forming the coating layer at the binding position of the overlapping surfaces of the sheets, the fiber component protrudes from the overlapping surfaces and is entangled and strongly bound (attached).

[Description of operating status]
Sheets sent from the image forming apparatus A with the above configuration are stacked on the processing tray 24 (stacking operation; FIG. 4A). The illustrated apparatus shows a case where the sheet bundle stacked at a predetermined stacking position on the processing tray 24 is offset and moved to the binding position for binding processing.

  In this case, when the image forming end signal (job end signal) is received, the control unit 65 moves the sheet bundle from the stacking position to the binding position (FIGS. 4A to 4B). Next, the control means 65 binds the sheet bundle at the binding position (FIG. 4C). Then, the bound sheet bundle is moved from the binding position to the paper discharge position (shown is the stacking position) (FIGS. 4D to 4E).

  Next, the binding processing operation will be described with reference to FIG. Image forming conditions and post-processing conditions are set in the image forming apparatus A (St01). In the illustrated system, the post-processing mode is set to “staple binding processing mode” “needleless binding processing mode” “other processing modes (for example, jog sorting processing mode)”.

  The control means 65 determines whether or not the set post-processing mode is needleless binding processing (St02). In the staple binding processing mode, staple binding means is executed (St03; not shown). In the other post-processing mode, the set post-processing is executed (St04; not shown).

  Next, the control unit 65 receives a paper discharge instruction signal from the image formation control unit 60 or detects a discharged sheet (St05). Then, the control means 65 determines whether or not this sheet is a coating target sheet (St06). The control means 65 carries out the coating process when the sheet is to be coated, and carries the sheet into the processing tray 24 without coating when the other sheet is used.

  The control unit 65 determines whether to perform the coating process from the page order information of the sheet sent from the image forming apparatus A. At the same time when the sheet is carried out from the image forming apparatus A, information on whether the sheet is the first sheet or the last sheet is sent as the tab information together with a sheet discharge instruction signal, for example, and the determination is made based on the information.

  Therefore, when the sheet is to be coated, the control means 65 stops the sheet at the timing when the sheet binding position reaches the platen position based on the detection signal from the inlet sensor Se1 that detects the leading edge of the sheet (or the sheet). The coating process is executed (without stopping) (St07).

  The sheet that has been coated and not coated is carried into the processing tray 24 (St08). Then, the sheets are aligned (St09). Sheet alignment is performed by the aligning unit 30 so that the posture in the width direction of the sheet matches the reference position (center reference or side reference). Next, the control means 65 receives an image forming job end signal from the image forming apparatus A (St010).

  The control unit 65 moves the sheet bundle from the alignment position on the processing tray to the binding position. This movement is executed, for example, by moving the position of the aligning means 30 (alignment plate) in the conveyance orthogonal direction. Then, the control means 65 operates the needleless binding processing means (crimp binding means) 28 (St11). Thereafter, the bound sheet bundle is carried out from the processing tray 24 to the stack tray 25 (St12 to St13).

  In the operation of the crimping and binding means 28, the pressure surfaces 28b of the movable pressure members 29b that are separated from each other are brought into pressure contact with the pressure surfaces 28a of the fixed pressure members 29a. As a result, the sheet bundle is pressed against the concave and convex surfaces formed on the pressure surfaces 28a and 28b, and the sheets are brought into close contact with each other and pressed.

  The movable pressing member 29a returns to the standby position after being crimped. At this time, since the coating layer Co is formed on the surface of the sheet in contact with the pressing surface 28b, the fiber component of the sheet is peeled off without being embedded in the pressing surface.

A Image forming apparatus B Post-processing apparatus (sheet binding processing apparatus)
2 Image forming unit 10 Print head 21 Carry-in port 22 Sheet conveyance path 23 Paper discharge port 24 Processing tray 25 Stack tray 26 Staple binding unit 28 Crimp binding unit 28a Fixed pressure surface 28b Movable pressure surface 29a Fixed pressure member 29b Movable pressure member 29x support shaft 30 side alignment means 34 leaf spring 40 coating means (first embodiment)
41 Conveying Guide 42 Platen Roller 46 Film 49 Conveying Roller 50 Coating Means (Second Embodiment)
51 Stamp body Co1 Front cover coating layer Co2 Back cover coating layer

Claims (8)

A support means for supporting a plurality of sheets in a stacked state;
A sheet binding unit that presses the sheet bundle on the support unit with a pair of pressing surfaces to press the sheets together;
A coating unit disposed in a supply unit for supplying the sheet to the support unit and attaching a coating layer to the sheet;
Control means for controlling the coating means;
With
The control means includes
A coating layer at a binding position of the sheet that contacts at least one of the pressure surfaces,
A sheet binding processing device characterized by forming. The control means includes
The sheet binding processing apparatus according to claim 1, wherein the coating layer is formed in a blank area located outside an image area of the sheet. The control means includes
When forming the coating layer by the coating means,
The coating layer is formed on a sheet that comes into contact with the pressing surface among a plurality of sheets to be bound,
Do not form a coating layer on the surface where the overlapping sheets touch each other,
The sheet binding processing apparatus according to claim 1 or 2, characterized in that The coating means includes
The sheet binding processing apparatus according to claim 1, wherein the sheet binding processing apparatus is disposed in a path for conveying the sheet to the sheet support unit. The coating means includes
A stamp mechanism for attaching an ink layer to the sheet;
A printing mechanism for forming an image on a sheet,
A transfer mechanism for attaching a film material to a sheet;
The sheet binding processing apparatus according to any one of claims 1 to 4, wherein the sheet binding processing apparatus is configured by any one of the mechanisms. The coating means includes
It is a material rich in surface curability or a material rich in peelability.
The sheet binding processing apparatus according to claim 1, wherein the coating layer is formed. The control means includes
At least one of the front cover surface and the back cover surface of the sheet bundle,
The sheet binding processing apparatus according to claim 6, wherein the coating layer is formed in a shape or color in which a binding processing position is visible. The sheet binding means includes
A pair of pressure members each having a pressure surface;
Shift means for moving one of the pressure members in a direction in which the pressure surface approaches and separates from the other pressure surface;
Drive means for driving the shift means;
The sheet binding processing apparatus according to claim 1, comprising:

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