WO2016157592A1 - シート後処理装置及びそれを備えた画像形成システム - Google Patents
シート後処理装置及びそれを備えた画像形成システム Download PDFInfo
- Publication number
- WO2016157592A1 WO2016157592A1 PCT/JP2015/080888 JP2015080888W WO2016157592A1 WO 2016157592 A1 WO2016157592 A1 WO 2016157592A1 JP 2015080888 W JP2015080888 W JP 2015080888W WO 2016157592 A1 WO2016157592 A1 WO 2016157592A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- discharge roller
- discharge
- tray
- processing
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/34—Apparatus for squaring-up piled articles
- B65H31/36—Auxiliary devices for contacting each article with a front stop as it is piled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
- B65H29/12—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers
- B65H29/125—Delivering or advancing articles from machines; Advancing articles to or into piles by means of the nip between two, or between two sets of, moving tapes or bands or rollers between two sets of rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/02—Pile receivers with stationary end support against which pile accumulates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/30—Arrangements for removing completed piles
- B65H31/3027—Arrangements for removing completed piles by the nip between moving belts or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H33/00—Forming counted batches in delivery pile or stream of articles
- B65H33/06—Forming counted batches in delivery pile or stream of articles by displacing articles to define batches
- B65H33/08—Displacing whole batches, e.g. forming stepped piles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
- B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/421—Forming a pile
- B65H2301/4212—Forming a pile of articles substantially horizontal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/10—Modular constructions, e.g. using preformed elements or profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/90—Machine drive
- B65H2403/94—Other features of machine drive
- B65H2403/942—Bidirectional powered handling device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/90—Machine drive
- B65H2403/94—Other features of machine drive
- B65H2403/945—Self-weight powered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2405/00—Parts for holding the handled material
- B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
- B65H2405/11—Parts and details thereof
- B65H2405/111—Bottom
- B65H2405/1115—Bottom with surface inclined, e.g. in width-wise direction
- B65H2405/11151—Bottom with surface inclined, e.g. in width-wise direction with surface inclined upwardly in transport direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2405/00—Parts for holding the handled material
- B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
- B65H2405/11—Parts and details thereof
- B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2405/00—Parts for holding the handled material
- B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
- B65H2405/11—Parts and details thereof
- B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side
- B65H2405/1134—Front, i.e. portion adjacent to the feeding / delivering side movable, e.g. pivotable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/40—Movement
- B65H2513/41—Direction of movement
- B65H2513/412—Direction of rotation of motor powering the handling device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/30—Forces; Stresses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/24—Post -processing devices
- B65H2801/27—Devices located downstream of office-type machines
Definitions
- the present invention relates to a sheet post-processing apparatus for performing post-processing such as punch hole forming processing and binding processing on a sheet such as a sheet on which an image is formed by an image forming apparatus such as a copying machine, a facsimile or a printer.
- post-processing such as punch hole forming processing and binding processing on a sheet such as a sheet on which an image is formed by an image forming apparatus such as a copying machine, a facsimile or a printer.
- a binding process in which a plurality of sheets on which an image is formed is stacked by an image forming apparatus such as a copying machine or a printer, and the stacked sheet bundle is collectively stapled and punched by a punch forming apparatus
- a sheet post-processing apparatus capable of executing punch hole forming processing and the like for removing the
- Patent Documents 1 and 2 disclose a sheet post-processing apparatus including a carry-in roller pair for carrying a sheet onto a processing tray and a discharge roller pair for discharging a sheet from the processing tray to a discharge tray.
- the discharge roller pair is composed of a discharge roller and a discharge roller pressed against or separated from the discharge roller, and in a state where the discharge roller and the discharge roller are separated, the sheet is carried onto the processing tray by the carry-in roller pair. Then, after the rear end of the sheet passes through the pair of carry-in rollers, the discharge roller and the discharge roller are brought into pressure contact with each other to be reversely rotated. As a result, the sheet is drawn upstream in the transport direction, and the sheet bundle on the processing tray is aligned by abutting on the rear end regulating surface of the processing tray.
- both the discharge roller 29a and the discharge roller 29b constituting the discharge roller pair 29 are reversely rotated.
- the sheet bundle P1 which has already been butted against the butting portion 30a of the processing tray 30 may be simultaneously drawn.
- the sheet bundle P1 is bent, and there is a possibility that the alignment of the sheet bundle may be deteriorated.
- the present invention is provided with a sheet post-processing apparatus capable of preventing misalignment of a sheet bundle when aligning a sheet bundle by drawing sheets onto a processing tray using a discharge roller pair.
- An object is to provide an image forming system.
- the present invention is a sheet post-processing apparatus provided with a processing tray, a discharge tray, and a discharge roller pair.
- the processing tray receives and stacks a predetermined number of sheets.
- the discharge tray is disposed on the downstream side of the processing tray in the sheet conveyance direction, and the sheets stacked on the processing tray are discharged.
- the discharge roller pair is composed of a discharge roller in contact with the top surface of the sheet stacked on the processing tray and a discharge roller in contact with the bottom surface of the sheet stacked on the processing tray.
- the sheet post-processing apparatus discharges the sheet from the processing tray to the discharge tray by rotating the discharge roller pair in the forward direction, and reversely rotates the discharge roller in a state in which the rotation of the discharge roller is stopped. Make a pull-in.
- the discharge roller when the sheet is drawn into the processing tray, only the discharge roller is reversely rotated in a state in which the rotation of the discharge roller is stopped, so that the drawing force is only for the sheet newly carried in And not on sheet bundles already aligned on the processing tray. Therefore, there is no possibility that the already aligned sheet bundle is drawn in and bent together with the newly introduced sheet, and the decrease in the alignment of the sheet bundle on the processing tray can be effectively prevented.
- FIG. 6 is a partially enlarged view of the periphery of the processing tray 30 in the sheet post-processing apparatus 20 in FIG.
- FIG. 10 is a partially enlarged view of the periphery of the processing tray 30 in the sheet post-processing apparatus 20 in FIG. 1, showing the state where the discharge roller 29 a is disposed at the contact position.
- a side cross-sectional view showing a state in which the following sheet P2 is pulled in while the sheet bundle P1 is stacked on the processing tray 40.
- a side cross-sectional view showing a state in which the following sheet P2 is pulled in while the sheet bundle P1 is stacked on the processing tray 40.
- FIG. 1 is a schematic view showing an internal configuration of an image forming apparatus 100 and a sheet post-processing apparatus 20 of the present invention.
- a multifunction peripheral is illustrated as an example of the image forming apparatus 100.
- the sheet post-processing device 20 of the present invention is not limited to a digital multifunction peripheral, and may be a laser printer, an inkjet printer, a facsimile machine, etc. Are similarly connectable.
- the image forming apparatus 100 is a so-called internal discharge type digital multi-functional peripheral, and roughly comprises a main body housing 2a and an upper housing 2b disposed on the upper portion thereof. ing.
- the upper housing 2b is provided with various mechanisms to be described later for reading an image of a document as an electric signal, and a document conveyance device 3 is attached to the upper portion of the upper housing 2b.
- the main housing 2a is provided with various mechanisms to be described later for transferring an image to a sheet based on electric signals of the read original image, and a sheet post-processing device 20 is attached to the left side of the main housing 2a. ing.
- the main housing 2a includes a lower housing 2aa and a connection housing 2ab located along the right side above and connected to the upper housing 2b.
- the lower housing 2aa is provided with a sheet feeding portion 4 for the sheet P, an image forming portion 6 for forming a toner image on the sheet P, and a fixing device 7 for fixing the toner image on the sheet.
- the connection housing 2 ab is provided with a sheet discharge portion (discharge portion) 18 for conveying the sheet P after fixing and discharging the sheet P from the main body housing 20.
- an in-body discharge space 16 which is largely opened toward the left side surface and the front side is formed on the left side of the connection housing 2 ab directly below the upper housing 2 b.
- the sheet P discharged from the left side surface of the connection housing 2ab is received and stacked in the in-body sheet discharge space 16, and the sheet P is conveyed to the sheet post-processing device 20 when the sheet P is subjected to predetermined post-processing.
- a relay unit 19 is provided which makes it possible.
- the sheet feeding unit 4 disposed at the lower portion, the sheet conveying unit 5 disposed at the side and the upper side of the sheet feeding unit 4, and the sheet conveying unit 5 disposed above the sheet feeding unit 4
- An image forming unit 6 and a fixing unit 7 disposed on the downstream side (right side in FIG. 2) of the image forming unit 6 in the sheet conveyance direction are provided.
- the sheet feeding unit 4 is provided with a plurality of sheet feeding cassettes 4 a provided with separating and feeding means such as a sheet feeding roller on the downstream side in the sheet conveying direction.
- the bundle of sheets P placed on the sheet feeding cassette 4a is fed to the sheet conveying portion 5 one by one from the top sheet P by the rotation operation of the sheet feeding roller.
- the sheet conveying unit 5 conveys the sheet P fed from the sheet feeding unit 4 to the image forming unit 6 by each conveyance roller pair 5a.
- the image forming unit 6 and the fixing unit 7 are provided in an elongated manner in a width direction (longitudinal direction, a direction orthogonal to the paper surface of FIG. 1) orthogonal to the sheet conveyance direction inside the apparatus main body 100.
- the image forming unit 6 and the fixing unit 7 are juxtaposed along the conveyance direction (left to right) of the sheet P in the order of the image forming unit 6 and the fixing unit 7 from the left side in FIG. There is.
- the image forming unit 6 forms a predetermined toner image on the sheet P by an electrophotographic process.
- the image forming unit 6 includes a photosensitive drum 9 which is an image carrier rotatably supported, a charging device 11 disposed around the photosensitive drum 9 along the rotational direction, an exposure device 12, The developing device 13, the transfer device 14, the cleaning device 15 and a charge removing device (not shown) are provided.
- the fixing unit 7 causes the sheet P on which the toner image has been transferred in the image forming unit 6 to be held between a pair of fixing rollers 7a consisting of a heating roller and a pressure roller, and heats and presses the sheet P to obtain an unfixed toner image. Fix on paper P.
- An image reading unit 8 is provided in the upper housing 2b.
- the image reading unit 8 reads image information of a document.
- the original conveying device 3 is opened and the original is placed on the contact glass 8a provided on the upper surface of the upper housing 2b.
- the originals are automatically supplied one by one from the original bundle and read by the image reading unit 8, the original bundle is placed on the sheet feeding tray 3 a of the closed original conveying device 3.
- the document bundle is placed on the paper feed tray 3a, the documents are automatically fed one by one onto the contact glass 8a one by one from the document bundle.
- light is emitted from an exposure lamp (not shown) to the document positioned on the contact glass 8a, and the reflected light is used as an image light as an optical system such as a reflecting mirror and an imaging lens (neither is shown). It is led to a photoelectric conversion unit (CCD) via an exposure lamp (not shown) to the document positioned on the contact glass 8a, and the reflected light is used as an image light as an optical system such as a reflecting mirror and an imaging lens (neither is shown). It is led to a photoelectric conversion unit (CCD) via
- the surface of the photosensitive drum 9 rotating counterclockwise in FIG. 1 is uniformly charged by the charging device 11.
- the laser beam from the exposure device 12 (laser device or the like) is irradiated onto the peripheral surface of the photosensitive drum 9.
- An electrostatic latent image is formed.
- a toner as a developer is supplied to the electrostatic latent image from the developing device 13 to form a toner image.
- the sheet P from the sheet feeding unit 4 passes through the sheet conveyance path 5 and is conveyed toward the photosensitive drum 9 on which the toner image is formed at a predetermined timing. Then, the toner image on the surface of the photosensitive drum 9 is transferred onto the sheet P by the transfer device 14 composed of a transfer roller or the like. Then, the sheet P on which the toner image has been transferred is separated from the photosensitive drum 9 and conveyed toward the fixing unit 7. When the sheet P passes through the fixing roller pair 7a, the sheet P is heated and pressed to fix the toner image.
- the residual toner remaining on the outer peripheral surface is removed by the cleaning device 15, and the residual charge is removed by the charge removing device (not shown). Discharging treatment is performed. Thereafter, the outer peripheral surface of the photosensitive drum 9 is charged again by the charging device 11, and the image formation is performed in the same manner.
- the sheet P having passed through the fixing unit 7 is conveyed vertically upward along the sheet conveyance path 5 into the connection housing 2 ab.
- the upper portion of the sheet conveyance path 5 branches into two conveyance paths up and down toward the left in the connection housing 2 ab, and the conveyance direction of the sheet P is switched by the switching claws 17 arranged at the branch part.
- a sheet discharge unit 18 is provided in the connection housing 2ab.
- the sheet discharge unit 18 includes an upper discharge roller pair 18a and a lower discharge roller pair 18b disposed immediately below the upper discharge roller pair 18a, and the sheet P conveyed in the sheet conveyance path 5 is a switching claw It is guided to the upper conveyance path or the lower conveyance path by 17.
- the sheet P guided to the upper conveyance path by the switching claw 17 is discharged to the left from the upper discharge roller pair 18a.
- the sheet P guided to the lower conveyance path by the switching claw 17 is discharged to the left by the lower discharge roller pair 18 b.
- the switching claw 17 is configured to switch the guiding direction by a control unit (not shown).
- the relay unit 19 is detachably mounted on the bottom surface 16 a of the in-body sheet discharge space 16.
- a detection sensor (not shown) for detecting the mounting of the relay unit 19 is provided in the internal sheet discharge space 16.
- the detection sensor is composed of a PI sensor or the like, and transmits the detection result to the control unit.
- the bottom surface 16a there is formed an inclined surface which inclines upward toward the downstream side (left side in FIG. 1) of the paper discharge direction.
- the bottom surface 16a is used as a sheet discharge tray.
- the detection sensor detects that the relay unit 19 is not attached, and when the detection result is transmitted to the control unit, the switching claw 17 guides the sheet P to the upper discharge roller pair 18a. Then, the sheet P discharged from the upper discharge roller pair 18a is discharged onto the bottom surface 16a.
- the switching claw 17 guides the sheet P to the lower discharge roller pair 18b. Do. Then, the sheet P discharged from the lower discharge roller pair 18 b is carried into the relay unit 19. The sheet P carried into the relay unit 19 passes through the inside of the relay unit 19 and is carried into the sheet post-processing device 20.
- the detection result can be displayed on the operation unit (not shown), and the user can switch the guiding direction of the sheet P on the operation panel.
- the upper surface portion of the relay unit 19 also has a function as a sheet discharge tray on which the sheet P discharged from the upper discharge roller pair 18a is placed.
- a punched-hole forming apparatus 21 for forming punched holes in the carried-in sheets P
- a processing tray 30 for stacking a plurality of carried-in sheets P (stacking)
- a stapler 40 which staples a bundle of sheets loaded on the sheet.
- a discharge tray 50 which can be raised and lowered to a position suitable for discharging the sheet P is provided.
- the punched hole forming device 21 is disposed at the upper portion of the sheet post-processing device 20, and forms a plurality of punched holes along one side edge (front or back side of the device) parallel to the conveyance direction of the sheet P. .
- a carry-in detection sensor (not shown) for detecting the leading edge of the paper P being carried is disposed.
- the control unit controls the driving of the sheet carry-in roller pair in the relay unit 19 based on the detection timing of the leading end of the sheet P by the carry-in detection sensor, thereby the sheet conveyed to the punched hole forming device 21 Adjust the punched hole formation position in the conveyance direction of P.
- a conveyance direction pulse adjustment value is set which adds or subtracts a reference conveyance pulse value from the detection of the leading end or the trailing end of the sheet P by the conveyance detection sensor to the stop of the sheet conveyance roller pair.
- FIG. 2 and 3 are partial cross-sectional views of the processing tray 30 and its surroundings in the sheet post-processing apparatus 20.
- FIG. A first discharge roller pair 27 is disposed on the downstream side of the punched hole forming device 21 (see FIG. 1) in the sheet conveyance direction.
- An actuator type sheet detection sensor 28 for detecting the passage of the sheet P is disposed on the upstream side of the first discharge roller pair 27.
- a processing tray 30 on which a predetermined number of sheets P conveyed by the first discharge roller pair 27 are stacked, and a bundle of sheets P stacked on the processing tray 30 ( There is provided a stapler 40 (see FIG. 1) which performs a binding process on a sheet bundle).
- a second discharge roller pair 29 for discharging a sheet bundle from the processing tray 30 to the discharge tray 50 is disposed on the downstream side of the processing tray 30 in the sheet conveyance direction.
- the second discharge roller pair 29 is composed of a rubber discharge roller 29a that can be rotated forward and reverse by a drive motor (not shown), and a resin discharge roller 29b that rotates following the discharge roller 29a.
- the discharge roller 29a is supported by a roller holder 31 which can be pivoted up and down with the pivot shaft 31a as a fulcrum.
- the sheet P carried in by the first discharge roller pair 27 is hit in the direction of the processing tray 30 and is along the tray surface.
- a striking member 33 for disposing is provided.
- the processing tray 30 is provided to be inclined downward toward the rear end side (downstream side with respect to the drawing direction of the sheets to the processing tray 30, right side in FIG. 2) of the sheets P to be stacked.
- the roller pair 29 reversely rotates, the sheet P is drawn onto the processing tray 30 from the rear end side, and the rear end of the sheet P abuts on the abutment portion 30 a.
- the sheet bundle is stacked on the processing tray 30 in a state where the rear ends of the sheet bundle are aligned.
- the processing tray 30 is provided with a pair of side end alignment cursors 60 for aligning the sheet bundle stacked on the processing tray 30 in the width direction (direction perpendicular to the paper surface of FIG. 2).
- the stapler 40 is movable in the sheet width direction orthogonal to the transport direction by a moving mechanism (not shown), and moves to a predetermined position along the lower end of the processing tray 30 according to the content of the binding process.
- a sheet P (indicated by a broken line in FIG. 2 and FIG. 3) on which image formation processing has been performed by the image forming apparatus 100 is carried in, it is conveyed by the punch hole forming apparatus 21 when punch hole formation is instructed. Punched holes are formed at predetermined positions (for example, two points along the side edge of the front side of the apparatus) of the sheet P to be cut. If no punch hole formation is instructed, the sheet P passes the punch hole forming device 21 as it is.
- the sheet P is conveyed further downstream by the first discharge roller pair 27.
- the roller holder 31 swings upward, and the discharge roller 29a is disposed at a position (retracted position) separated from the discharge roller 29b. Therefore, the sheet P conveyed by the first discharge roller pair 27 protrudes through the gap between the discharge roller 29 a and the discharge roller 29 b to the discharge tray 50.
- the roller holder 31 is swung downward to arrange the discharge roller 29a at a position (contact position) in contact with the discharge roller 29b. Thereafter, the striking member 33 is driven to cause the sheet P to run along the processing tray 30. In this state, by rotating the discharge roller 29a in the reverse direction (counterclockwise direction in FIG. 3), the sheet P is drawn along the processing tray 30, and the rear end is aligned by the abutment portion 30a.
- the abutting portion 30a is not continuously formed over the entire area in the sheet width direction, and a notch is partially formed.
- the upper portion of the sheet P is nipped by the second discharge roller pair 29, and the leading end of the sheet P protrudes from the second discharge roller pair 29 onto the discharge tray 50.
- the sheet P is drawn along the processing tray 30, the sheet P is nipped while the discharge roller 29a is in pressure contact with the discharge roller 29b by the weight of the roller holder 31 so that the sheet P is not drawn more than necessary.
- the stapler 40 is moved to the notch position of the butting portion 30a, the rear end of the sheet bundle is inserted into the staple portion 40a, and the sheet bundle is stapled by the staple portion 40a. Processing is performed. After the sheet bundle is stapled by the staple unit 40 a, the sheet bundle is conveyed upward along the processing tray 30 by rotating the second discharge roller pair 29 forward (in the direction of the arrow in FIG. 3). Exhausted on top.
- the sheet bundle is discharged onto the discharge tray 50, not only the weight of the roller holder 31 but also the roller holder 31 is biased downward by a biasing member such as a spring to press the discharge roller 29a against the discharge roller 29b. As a result, since the sheet bundle is nipped by a force stronger than that at the time of drawing in the sheet P, the sheet bundle can be reliably discharged to the discharge tray 50.
- the roller holder 31 When the shift discharge instruction is issued, the roller holder 31 is first moved to the retracted position when the second discharge roller pair 29 is driven to discharge the sheet bundle to the discharge tray 50. Thereafter, the side end alignment cursor 60 is placed at a position (reference position) at which the sheet P is received, or at a position (shift position) shifted by a predetermined amount in a direction (paper width direction) orthogonal to the discharge direction from the reference position. Then, the roller holder 31 is moved to the contact position to discharge the sheet. As a result, the sheet bundle is alternately discharged to the reference discharge position on the discharge tray 50 and the shift discharge position shifted from the reference discharge position by a predetermined amount in the direction (paper width direction) orthogonal to the discharge direction. When being discharged onto the discharge tray 50 (see FIG. 2), the sheets are stacked and sorted alternately in the sheet width direction.
- the discharge rollers 29 b constituting the second discharge roller pair 29 rotate only in the forward direction (counterclockwise direction in FIGS. 2 and 3) for discharging the sheet P to the discharge tray 50. It is possible.
- a method of enabling the discharge roller 29b to rotate only forward for example, a method of incorporating a one-way mechanism such as a one-way gear or a one-way clutch which can rotate only in one direction on the rotation shaft of the discharge roller 29b.
- a one-way mechanism such as a one-way gear or a one-way clutch which can rotate only in one direction on the rotation shaft of the discharge roller 29b.
- the position of the discharge roller 29a is separated from the discharge roller 29b (retracted position) and a position where the discharge roller 29a abuts It can be easily switched to the contact position).
- the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.
- the configuration in which the image forming apparatus 100 and the sheet post-processing apparatus 20 are directly connected is described as an example, but an interleaf is inserted between the image forming apparatus 100 and the sheet post-processing apparatus 20
- the present invention can also be applied to a configuration in which an insert device is mounted.
- the present invention is applicable to a sheet post-processing apparatus that stacks sheets in alignment on a processing tray using a discharge roller pair.
- a sheet post-processing apparatus capable of preventing a sheet bundle from being misaligned and an image forming system including the same when the sheet is drawn into a processing tray by a discharge roller pair to align the sheet bundle. be able to.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Pile Receivers (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
Claims (6)
- 所定枚数のシートを受け入れて積載する処理トレイと、
該処理トレイのシート搬送方向下流側に配置され、前記処理トレイ上に積載されたシートが排出される排出トレイと、
前記処理トレイに積載されるシートの最上面に接触する排出ローラーと、前記処理トレイに積載されるシートの最下面に接触する排出コロと、で構成される排出ローラー対と、
を備えたシート後処理装置において、
前記排出ローラー対を正回転させることにより前記処理トレイから前記排出トレイへシートを排出し、前記排出コロの回転を停止させた状態で前記排出ローラーを逆回転させることにより前記処理トレイへのシートの引き込みを行うことを特徴とするシート後処理装置。 - 前記排出ローラーを回転可能に支持する揺動可能なローラーホルダーを備えており、前記ローラーホルダーの揺動により、前記排出ローラーが、前記排出コロから離間した退避位置と、前記排出コロに当接した当接位置とに選択配置されることを特徴とする請求項1に記載のシート後処理装置。
- 前記ローラーホルダーを下向きに付勢する付勢部材を備え、
前記処理トレイへのシートの引き込みを行う場合は、前記ローラーホルダーの自重のみで前記排出ローラーを前記当接位置に配置し、
前記排出トレイにシートを排出する場合は、前記ローラーホルダーの自重に加えて、前記付勢部材により前記ローラーホルダーを下方に付勢して前記排出ローラーを前記当接位置に配置することを特徴とする請求項2に記載のシート後処理装置。 - 前記排出コロは、前記排出ローラーに従動して正回転するとともに、前記排出コロの逆回転を規制するワンウェイ機構が設けられていることを特徴とする請求項1に記載のシート後処理装置。
- 前記処理トレイは、前記処理トレイへのシートの引き込み方向に対し下流側に向かって下向きに傾斜するように設けられていることを特徴とする請求項1に記載のシート後処理装置。
- 請求項1に記載のシート後処理装置と、
該シート後処理装置に連結され、シートに画像を形成するとともに画像が形成されたシートを前記シート後処理装置に搬送する画像形成装置と、
を備えた画像形成システム。
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CN201580058016.0A CN107148391B (zh) | 2015-03-30 | 2015-11-02 | 薄片体后处理装置及具备其的图像形成系统 |
US15/521,541 US20170305704A1 (en) | 2015-03-30 | 2015-11-02 | Sheet post-processing device and image forming system provided with the same |
EP15887734.0A EP3219653B1 (en) | 2015-03-30 | 2015-11-02 | Sheet post-processing device and image forming system equipped with same |
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JP3886134B2 (ja) * | 2003-03-06 | 2007-02-28 | キヤノン株式会社 | シート処理装置 |
JP5402592B2 (ja) * | 2009-12-09 | 2014-01-29 | 株式会社リコー | シート処理装置、画像形成装置、及びシート処理方法 |
JP5518396B2 (ja) * | 2009-08-11 | 2014-06-11 | ニスカ株式会社 | 画像形成装置 |
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JP3673575B2 (ja) * | 1995-12-08 | 2005-07-20 | キヤノンファインテック株式会社 | シート集積装置及びそれを備えた画像形成装置 |
JP2000086076A (ja) * | 1998-09-17 | 2000-03-28 | Konica Corp | 画像形成装置 |
US6962331B2 (en) * | 2003-03-06 | 2005-11-08 | Canon Kabushiki Kaisha | Sheet stacking apparatus |
JP5409528B2 (ja) * | 2010-03-31 | 2014-02-05 | 京セラドキュメントソリューションズ株式会社 | 用紙後処理装置 |
US9150378B2 (en) * | 2012-08-31 | 2015-10-06 | Riso Kagaku Corporation | Sheet stack tray having sheet pressurizing member |
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JP3886134B2 (ja) * | 2003-03-06 | 2007-02-28 | キヤノン株式会社 | シート処理装置 |
JP5518396B2 (ja) * | 2009-08-11 | 2014-06-11 | ニスカ株式会社 | 画像形成装置 |
JP5402592B2 (ja) * | 2009-12-09 | 2014-01-29 | 株式会社リコー | シート処理装置、画像形成装置、及びシート処理方法 |
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EP3219653B1 (en) | 2019-08-21 |
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