US20080150210A1 - Sheet post-processing apparatus - Google Patents

Sheet post-processing apparatus Download PDF

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Publication number
US20080150210A1
US20080150210A1 US11/615,358 US61535806A US2008150210A1 US 20080150210 A1 US20080150210 A1 US 20080150210A1 US 61535806 A US61535806 A US 61535806A US 2008150210 A1 US2008150210 A1 US 2008150210A1
Authority
US
United States
Prior art keywords
folding
diameter
sheet
processing apparatus
folding rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/615,358
Other languages
English (en)
Inventor
Ken Iguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Toshiba TEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba TEC Corp filed Critical Toshiba TEC Corp
Priority to US11/615,358 priority Critical patent/US20080150210A1/en
Assigned to TOSHIBA TEC KABUSHIKI KAISHA reassignment TOSHIBA TEC KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Iguchi, Ken
Priority to JP2007254187A priority patent/JP2008156114A/ja
Priority to CNA2007103016020A priority patent/CN101205029A/zh
Publication of US20080150210A1 publication Critical patent/US20080150210A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H39/00—Associating, collating, or gathering articles or webs
    • B65H39/10—Associating articles from a single source, to form, e.g. a writing-pad
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/18—Form of handled article or web
    • B65H2701/182—Piled package
    • B65H2701/1829—Bound, bundled or stapled stacks or packages
    • 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
    • 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
    • B65H2801/31—Devices located downstream of industrial printers

Definitions

  • This invention relates to a sheet post-processing apparatus having saddle-stitching processing and folding processing functions, and particularly a sheet post-processing apparatus that can realize highly accurate folding processing.
  • a sheet post-processing apparatus has been proposed that has a bookbinding function to bind, with staples, plural sheets on which images have been formed.
  • binding methods carried out in such a sheet post-processing apparatus there are edge-stitching of stitching a sheet pack at one position or plural positions on its edge side, and saddle-stitching of stitching a sheet pack at plural positions in its central part.
  • Some apparatuses that carry out saddle-stitching have a saddle-stitching and folding function of folding a stitched sheet pack at its central part into a weekly magazine shape.
  • a folding unit at the central part is formed by a folding knife and a pair of folding rollers (for example, JP-A-2005-8418).
  • the folding unit at the central part of a sheet pack is to push the central part of the sheet pack that has been transported, to facing parts of the pair of folding rollers by the folding knife, and to perform bending processing to the sheet pack by pressurization due to the rotation of the folding rollers.
  • the folding force (pressurization activating force) to the sheet pack is active only in a linear grounding area of the facing parts of the pair of folding rollers where the folding surface of the sheet pack faces. Therefore, the activation of pressurization causes linearly equally distributed load.
  • the adhesion pressure (press-contact force) of the pair of folding rollers must be extremely high and the linearly equally distributed load must be high as a whole. Otherwise, sharp folding processing with desired adhesion cannot be carried out.
  • the inward part of the folded sheet pack SP is higher as shown in FIG. 9 . Also, since the folded sheet pack SP are not adhered to each other, it is not firm at all in the direction of transport as shown in FIG. 10 , causing a problem that jamming is generated during the transport.
  • a sheet post-processing apparatus includes
  • a stitching processing unit configured to stitch a sheet pack transported in a transport passage, at predetermined plural positions in along a straight line orthogonal to the direction of the transport with a stitching needle,
  • a pair of folding rollers arranged on a stage following the stitching processing unit in the transport passage, in which large-diameter parts and small-diameter parts of the respective folding rollers are alternately formed symmetrically about the center of the transport passage, and in which facing parts are arranged at the central part in the transport passage so that the small-diameter parts are abutted against the large-diameter parts, and
  • a folding unit having a paper folding plate configured to push the sheet pack into an abutting part of the pair of folding rollers.
  • FIG. 1 is a schematic sectional view of a sheet post-processing apparatus as the best embodiment to carry out this invention.
  • FIG. 2 is a perspective view showing the positional relation between a sheet pack and a paper folding plate when the sheet pack is stopped at a predetermined position in the sheet post-processing apparatus of this invention.
  • FIG. 3 is a side view in the case of performing folding processing to a sheet pack in the sheet post-processing apparatus of this invention.
  • FIG. 4 is a perspective view showing the relation between the paper folding plate and folding rollers for performing folding processing in the sheet post-processing apparatus of this invention.
  • FIG. 5 is a side view of a mechanism for driving the paper folding plate in the sheet post-processing apparatus of this invention.
  • FIG. 6 is an explanatory view of the shape of the folding rollers in the sheet post-processing apparatus of this invention.
  • FIG. 7 is a side view showing the pressing position of the paper folding plate and the movement of a sheet pack in the folding processing in the sheet post-processing apparatus of this invention.
  • FIG. 8 is a side view showing the state when performing the folding processing while fixing a sheet pack with a paper discharge guide plate in the sheet post-processing apparatus of this invention.
  • FIG. 9 is an explanatory view showing trouble in a conventional sheet post-processing apparatus.
  • FIG. 10 is an explanatory view showing trouble in a conventional sheet post-processing apparatus.
  • FIG. 1 is a schematic sectional view of a sheet post-processing apparatus 2 as the best embodiment to carry out this invention.
  • This sheet post-processing apparatus 2 has a simplified bookbinding function of receiving sheets on which images have been formed by an image forming apparatus 1 , performing staple processing, and folding a stapled sheet pack SP.
  • the sheet post-processing apparatus 2 includes a entry guide plate 201 , feed rollers 202 , 203 , a branching pawl 204 , a discharge feed roller 205 , a staple tray 402 , a staple tray feed roller 209 , a paddle 210 , a sheet rear end receiver 421 , a saddle-stitching stapler 403 , transport rollers 211 , 232 , a paper discharge guide plate 231 , a paper folding plate (stitching needle abutting member) 466 , folding rollers 451 , 452 , and a paper discharge tray 301 , arranged along a transport passage in which a sheet pack SP is transported.
  • the sheets discharged from the image forming apparatus 1 are guided to the transport passage in the apparatus by the entry guide plate 201 .
  • the sheets are transported by the feed rollers 202 , 203 , and sent to either a transport passage for discharge or a transport passage for staple processing, by the branching pawl 204 .
  • the sheets are sent to the staple tray 402 by the staple tray feed roller 209 , and here the sheets are dropped one by one below the staple tray 402 by the paddle 210 .
  • the sheets dropped by the paddle 210 are received by the sheet rear end receiver 421 and the rear ends of the sheets are aligned with each other.
  • the alignment in the direction of the width of the sheets is carried out by a lateral alignment plate, not shown.
  • the transport roller 232 is situated at a position away from the transport roller 211 by the turning of the paper discharge guide plate 231 .
  • saddle-stitching processing of the sheet pack SP is carried out at two positions thereon by two saddle-stitching staplers 403 provided at a predetermined spacing in a horizontal direction.
  • the stitching positions are on a line that lies at the center of the sheets in the same direction as the sheet transporting direction.
  • the sheet pack SP is lifted up by a pack takeout belt, not shown, and it is stopped when the stitching staples from the saddle-stitching staplers 403 have reached predetermined positions.
  • FIG. 2 is a perspective view showing the positional relation between the sheet pack SP and the paper folding plate 466 in this case.
  • the paper folding plate 466 is waiting at a position away from the sheet pack SP as shown in FIG. 2 .
  • the sheet pack SP After that, operations described below by the transport rollers 211 , 232 and their peripheries, and the paper folding plate 466 are carried out to the sheet pack SP, and the central part of the sheet pack SP is pushed in between the folding rollers 451 , 452 by the paper folding plate 466 as shown in FIG. 3 . After simplified bookbinding processing is thus carried out, the sheet pack SP is discharged to the paper discharge tray 301 .
  • the sheets are sent toward the discharge feed roller 205 by the branching pawl 204 , then sent to the transport rollers 211 , 232 by the transporting force of the discharge feed roller 205 , and directly discharged to the paper discharge tray 301 .
  • the operations of the respective parts in the sheet post-processing apparatus 2 are controlled by a control unit, not shown, in accordance with input of instructions from the user.
  • FIG. 4 is a perspective view of the paper folding plate 466 and the folding rollers 451 , 452 for carrying out folding processing.
  • FIG. 5 is a side view of a mechanism for driving the paper folding plate 466 .
  • the paper folding plate 466 in the form of a thin plate is provided to be movable in the direction of the arrow along a guide slit 465 by fitting a shaft part 464 integrated with its lower surface into the guide slit 465 .
  • the rotational driving from an output gear 461 a of a paper folding plate driving motor 461 is transmitted to a cam 467 via an intermediate gear 462 , thus causing the cam to turn forward and backward.
  • a link 463 has its one end rotatably and axially supported by a shaft part 462 a of the intermediate gear 462 , and has the one shaft part 464 loosely fit in an elongate slit provided at its other end.
  • a pin 467 a provided in the cam 467 is axially supported at a middle part of the link 463 . The forward and backward turn of the cam 467 causes the link 463 to rock between the position indicated by the solid line and the position indicated by the dotted line.
  • the paper folding plate 466 linearly reciprocates in the direction of the arrow.
  • the paper folding plate 466 also has protruding parts 466 a, 466 b, 466 c at its distal end.
  • the protruding parts 466 a and 466 c are provided at the same positions as the staple positions of the saddle-stitching stapler 403 .
  • the protruding part 466 b is provided at the center between the two staple positions of the saddle-stitching stapler 403 .
  • the purpose of providing the protruding parts 466 a, 466 b, 466 c at three positions is to cope with the flexure of the sheet pack SP and generation of wrinkles at the central part in the folded state due to incomplete pressing of the sheet pack SP to the folding rollers 451 , 452 , which would occur in the case where the protruding parts are provided at two positions on the paper folding plate 466 .
  • each roller of the pair of folding rollers 451 , 452 is a stepped roller with a step of approximately 1 to 2 mm, and has a shape in which large-diameter parts 451 a, 452 a having a large roller diameter, and small-diameter parts 451 b, 452 b having a small roller diameter are alternately arranged symmetrically about the center CL of the transport passage. Moreover, these are arranged so that the facing parts of the folding rollers 451 , 452 to each other have different diameters.
  • the large-diameter parts 451 a, 452 a of the one folding roller 451 , 452 face and are abutted against the small-diameter parts 451 b, 452 b of the other folding roller 451 , 452 .
  • the large-diameter parts 451 a, 452 a or the small-diameter parts 451 b, 452 b are arranged symmetrically about the center CL of the transport passage.
  • a combination of the large-diameter part 451 a, 452 a of the one folding roller 451 , 452 and the small-diameter part 451 b, 452 b of the other folding roller 451 , 452 is constantly arranged.
  • the width of the large-diameter parts 451 a, 452 a and the small-diameter parts 451 b, 452 b arranged at the center CL of the transport passage is smaller than the width of the minimum sheet pack SP transported in the transport passage.
  • Each folding roller 451 , 452 is formed so that the total of the large-diameter parts 451 a, 452 a and the small-diameter parts 451 b, 452 b is at least three or more.
  • the folding rollers 451 , 452 are configured to be rotationally driven in both directions by the driving of a driving gear pulley 455 , intermediate gears 456 and a following gear 457 via a timing belt 454 in accordance with the driving of a folding roller driving motor 453 .
  • the driving gear pulley 455 , the intermediate gears 456 and the following fear 457 are connected by arms 458 , 459 and are configured to be movable between relative positions with respect to each other while maintaining their respective axes.
  • the rotational driving can be securely transmitted to both folding rollers 451 , 452 .
  • the folding rollers 451 , 452 are pressed in contact with each other by a tension spring (not shown).
  • the protruding parts 466 a, 466 b, 466 c at the distal end of the paper folding plate 466 press the positions of the staples stapling the sheet pack SP, and move forward to the position that overlaps the nipping position of the folding rollers 451 , 452 , thus carrying out folding processing to the central part of the sheet pack SP by the press contact and rotation of the folding rollers 451 , 452 .
  • both of the folding rollers 451 , 452 are stepped rollers with a step of approximately 1 to 2 mm and are arranged in such a manner that the facing parts of the folding rollers 451 , 452 to each other have different diameters. Therefore, the sheet pack SP nipped and pressed between the pair of folding rollers 451 , 452 is bent at the parts where the combination of the large-diameter part 451 a, 452 a and the small-diameter part 451 b, 452 b of the folding rollers 451 , 452 facing each other changes into the opposite combination, and dot-like pressurizing points P are generated there.
  • the sheet pack SP receives concentrated load due to the pressurizing points P and is strongly bent by the concentrated load. Therefore, sharp folding with adhesion can be achieved. Also, since wrinkles on the sheet pack SP are expanded at the same time, a wrinkle removing effect can be achieved, too.
  • the pressurizing points P can be increased accordingly.
  • the folding state is worse by the amount equivalent to the thickness of the paper folding plate 466 because the pair of folding rollers 451 , 452 cannot be directly pressed in contact thereto.
  • the folding state at the staple positions the folding is worse than the parts having no staples because of the thickness of the staples. Therefore, if the protruding parts 466 a and 466 c of the paper folding plate 466 coincide with the staple positions on the sheet pack SP, the positions with the poor folding state coincide with the staple positions and the minimum folding state can be secured.
  • the protruding parts 466 a, 466 b, 466 c of the paper folding plate 466 press the sheet pack SP and move forward to the position that overlaps the nipping position of the folding rollers 451 , 452 , thus carrying out folding processing to the central part of the sheet pack SP by the press contact and rotation of the folding rollers 451 , 452 , the protruding parts 466 a, 466 b, 466 c of the paper folding plate 466 that have moved forward need to retreat from the pressurizing state between the folding rollers 451 , 452 and the sheet pack SP.
  • the rotation of the driving motor is locked, thereby fixing the distal end of the sheet pack SP.
  • the fixation of the sheet pack SP by the paper discharge guide plate 231 can be secured.
  • the sheet part directly above the stitching staple is pushed by the paper folding plate 466 , and while the distal end of the paper folding plate hooks the staple on the fixed sheet pack SP and thus receives resistance due to friction, the paper folding plate pushes the sheet pack toward the nipping part of the folding rollers 451 , 452 , as shown in FIG. 7( c ).
  • the sheet pack SP is directly discharged from the nipping part of the folding rollers 451 , 452 to the paper discharge tray 301 .
  • the sheet pack SP is firm in the transport direction. Advantages can be provided that the transport accuracy after the folding can be improved and that the loading accuracy to the tray can be improved.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
US11/615,358 2006-12-22 2006-12-22 Sheet post-processing apparatus Abandoned US20080150210A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11/615,358 US20080150210A1 (en) 2006-12-22 2006-12-22 Sheet post-processing apparatus
JP2007254187A JP2008156114A (ja) 2006-12-22 2007-09-28 用紙後処理装置
CNA2007103016020A CN101205029A (zh) 2006-12-22 2007-12-20 用纸后处理装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/615,358 US20080150210A1 (en) 2006-12-22 2006-12-22 Sheet post-processing apparatus

Publications (1)

Publication Number Publication Date
US20080150210A1 true US20080150210A1 (en) 2008-06-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/615,358 Abandoned US20080150210A1 (en) 2006-12-22 2006-12-22 Sheet post-processing apparatus

Country Status (3)

Country Link
US (1) US20080150210A1 (zh)
JP (1) JP2008156114A (zh)
CN (1) CN101205029A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11092150B2 (en) 2017-03-13 2021-08-17 Encite Llc Micro pump systems and processing techniques
CN114683614A (zh) * 2022-03-23 2022-07-01 北京市群英印刷有限公司 一种纸制品自动折叠装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8105227B2 (en) * 2009-04-29 2012-01-31 Xerox Corporation Pressure reducing folding system
EP2532492B1 (de) * 2009-06-08 2014-04-23 Baumüller Nürnberg GmbH Variables Falzsystem mit Linearantrieben insbesondere für Druckmaschinen
JP6102101B2 (ja) * 2012-07-12 2017-03-29 富士ゼロックス株式会社 用紙処理装置および画像形成システム
JP5965885B2 (ja) * 2013-10-30 2016-08-10 京セラドキュメントソリューションズ株式会社 シート折り装置及びシート後処理装置
US8991817B1 (en) 2014-02-14 2015-03-31 Kabushiki Kaisha Toshiba Paper conveyance apparatus
US10987964B2 (en) * 2018-03-22 2021-04-27 Fuji Xerox Co., Ltd. Post-processing apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094660A (en) * 1988-06-15 1992-03-10 Fuji Photo Film Co., Ltd. Image recording apparatus
US5184999A (en) * 1990-08-03 1993-02-09 Coly S.A.R.L. Device and process for the pressing of sheets during folding
US6022011A (en) * 1996-11-01 2000-02-08 Ricoh Company, Ltd. Sheet finisher including binding, folding and stacking
US6394441B1 (en) * 1999-08-04 2002-05-28 Hewlett-Packard Company Handling stapled documents for post-processing operations using magnetic forces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094660A (en) * 1988-06-15 1992-03-10 Fuji Photo Film Co., Ltd. Image recording apparatus
US5184999A (en) * 1990-08-03 1993-02-09 Coly S.A.R.L. Device and process for the pressing of sheets during folding
US6022011A (en) * 1996-11-01 2000-02-08 Ricoh Company, Ltd. Sheet finisher including binding, folding and stacking
US6394441B1 (en) * 1999-08-04 2002-05-28 Hewlett-Packard Company Handling stapled documents for post-processing operations using magnetic forces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11092150B2 (en) 2017-03-13 2021-08-17 Encite Llc Micro pump systems and processing techniques
CN114683614A (zh) * 2022-03-23 2022-07-01 北京市群英印刷有限公司 一种纸制品自动折叠装置

Also Published As

Publication number Publication date
CN101205029A (zh) 2008-06-25
JP2008156114A (ja) 2008-07-10

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Date Code Title Description
AS Assignment

Owner name: TOSHIBA TEC KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:IGUCHI, KEN;REEL/FRAME:018673/0266

Effective date: 20061204

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION