EP0564291A2 - Umschaltvorrichtung für den Blattransportweg in einem Bilderzeugungsgerät - Google Patents

Umschaltvorrichtung für den Blattransportweg in einem Bilderzeugungsgerät Download PDF

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Publication number
EP0564291A2
EP0564291A2 EP93302589A EP93302589A EP0564291A2 EP 0564291 A2 EP0564291 A2 EP 0564291A2 EP 93302589 A EP93302589 A EP 93302589A EP 93302589 A EP93302589 A EP 93302589A EP 0564291 A2 EP0564291 A2 EP 0564291A2
Authority
EP
European Patent Office
Prior art keywords
sheet
switch
roller
belt
roller pair
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.)
Granted
Application number
EP93302589A
Other languages
English (en)
French (fr)
Other versions
EP0564291B1 (de
EP0564291A3 (de
Inventor
Yasushi Nakazato
Tetsuo Yamanaka
Hiroshi Hosokawa
Hiroyuki Shibaki
Takefumi Adachi
Shigeru Yamazaki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP0564291A2 publication Critical patent/EP0564291A2/de
Publication of EP0564291A3 publication Critical patent/EP0564291A3/xx
Application granted granted Critical
Publication of EP0564291B1 publication Critical patent/EP0564291B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/58—Article switches or diverters
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/448—Diverting
    • B65H2301/4482—Diverting to multiple paths, i.e. more than 2
    • B65H2301/44822—3 paths
    • 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
    • B65H2404/11—Details of cross-section or profile
    • B65H2404/115—Details of cross-section or profile other
    • B65H2404/1151—Details of cross-section or profile other brush
    • 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
    • B65H2404/142—Roller pairs arranged on movable frame
    • B65H2404/1421—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • 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
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/56—Flexible surface
    • B65H2404/561—Bristles, brushes
    • 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
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/61—Longitudinally-extending strips, tubes, plates, or wires
    • B65H2404/611—Longitudinally-extending strips, tubes, plates, or wires arranged to form a channel
    • B65H2404/6112—Longitudinally-extending strips, tubes, plates, or wires arranged to form a channel and displaceable for changing direction of transport
    • 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
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/63—Oscillating, pivoting around an axis parallel to face of material, e.g. diverting means
    • 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
    • B65H2513/10—Speed

Definitions

  • the present invention relates to a device incorporated in a printer, copier, facsimile apparatus or similar image forming apparatus for switching the path for transporting sheets.
  • An upper and a lower sheet tray 6 and 7 are mounted on the printer body 1 and provided with pick-up rollers 15a and 15b, respectively.
  • the sheet feed unit 3 is provided with a pick-up roller 15c.
  • a sheet, not shown, is fed from any one of the sheet trays 6 and 7 and sheet feed unit 3 by the associated pick-up roller 15a, 15b or 15.
  • the sheet is once brought to a stop on abutting against a register roller pair 16 which adjoins the drum 8.
  • the register roller pair 16 starts rotating in synchronism with the movement of the toner image formed on the drum 8 which is in rotation. As a result, the sheet is driven toward a position where the drum 8 and an image transfer an sheet separation unit 17 disposed below the drum 8 face each other.
  • the sheet transport path switching device 20 has an inlet roller pair 31 for transporting a sheet P in addition to the previously mentioned switch roller 21.
  • the switch roller 21 is a reversible roller and located on a line L extending through the nip portion Np of the inlet roller pair 31 in the direction of sheet transport. As the direction in which the switch roller 21 rotates is changed, either of a path 33 terminating at the sheet discharge unit 4 and a path 34 terminating at the duplex unit 2 is selected.
  • the switch roller 21 is reversibly driven by a motor, not shown, independent of the main motor for driving the various portions of the image forming system.
  • a transport roller pair 35 is provided on the path 34 for transporting the sheet P and corresponds to the transport roller pair 23.
  • Guide plates 36, 37 and 38 each guides the sheet P along the associated path 33 or 34.
  • a sensor 12 is positioned at the inlet of the fixing unit 19.
  • FIG. 3A shows a condition wherein the inlet roller pair 31 has driven the first sheet P1 to a position where the leading edge of the sheet P1 slightly protrudes from the roller pair 31 on a line extending through the nip portion of the roller pair 31 in the direction of sheet feed (see the line L).
  • the switch roller 21 is rotating counterclockwise to steer the sheet P1 toward the path 33.
  • FIG. 3B as the leading edge Pa of the sheet P1 abuts against the switch roller 21, it is directed toward the path 33 by the rotation of the switch roller 21.
  • FIG. 3C the sheet P1 is nipped and driven by the roller pair 23 to move the path 33 upward along the guide plates 36 and 37.
  • the roller 21 is caused to rotate clockwise, as shown in FIG. 3D.
  • FIG. 6 shows a roller arrangement which does not satisfy the above-stated condition.
  • the intermediate portion Pc of the sheet P contacts the periphery 21a of the switch roller 21.
  • the switch roller 21 when the switch roller 21 is rotating in a direction different from the transport direction of the sheet P, it rubs itself against the side of the sheet P facing the roller 21 and thereby degrades an image which may exist there.
  • the embodiment prevents the switch roller 21 from contacting the intermediate portion Pc of the sheet P, as stated above.
  • FIG. 7A shows a condition wherein the inlet roller pair 31 has driven the first sheet P1 to a position where the leading edge of the sheet P1 slightly protrudes from the nip portion of the roller pair 31.
  • the switch roller 21 is rotating counterclockwise to steer the sheet P1 toward the path 33.
  • FIG. 7B as the leading edge Pa of the sheet P1 abuts against the switch roller 21, it is directed toward the path 33 by the rotation of the switch roller 21.
  • the sheet P1 is nipped and driven by the roller pair 23 to begin to move the path 33 upward along the guide plates 36 and 37.
  • the switch roller 21 is reversed to rotate clockwise to prepare for the second sheet P2.
  • the roller 21 steers it into the path 34, as shown in FIG. 7D.
  • FIGS. 12A-12D, 13A and 13B an alternative embodiment of the present invention will be described which changes the direction of rotation of the switch belt 41 before the trailing edge Pb of the sheet P1 is brought out of contact with the belt 41.
  • the operation of this embodiment will also be described on the assumption that sheets P sequentially coming in the switching device are steered to the paths 33 and 34 alternately.
  • the switching device steers consecutive sheets to the paths 33 and 34 alternately.
  • the driven rollers 43 and 44 each cooperates with the switch roller 21 to convey the sheet P having been directed toward the associated path. Hence, it is needless to locate transport roller pairs downstream of and in close proximity to the switch roller 21. As a result, the number of required parts is reduced to implement a compact design.
  • the switching device steers consecutive sheets to the paths 33 and 34 alternately.
  • the first sheet P1 is continuously transported on the path 33 along the guide plates 36 and 37 due to the force of the inlet roller pair 31.
  • FIG. 28C when the leading edge of the second sheet P2 abuts against the switch roller 21, it is steered in the rotating direction of the switch roller 21, i.e., toward the nip portion of the roller 21 and driven roller 44.
  • FIG. 28D when the leading edge of the sheet P2 moves away from the nip portion of the rollers 21 and 44, the solenoid 54B of the retracting means 50B is energized to retract the driven roller 44 away from the switch roller 21.
  • FIGS. 31 and 32 show another alternative embodiment of the present invention similar to the embodiment of FIGS. 29 and 30 except that the switch roller 21 is replaced with the switch belt 41.
  • the switch belt 41 is movable between an operative or steering position indicated by a phantom line and an inoperative or retracted position indicated by a solid line.
  • retracting means similar to the retracting means 60 shown in FIG. 29.
  • This embodiment is also successful in steering sheets P into the linear path 61, as desired.
  • FIG. 32 when the switch belt 41 is brought to the retracted position, it contacts the lower surface of the sheet P being transported by the inlet roller pair 31 and rotates in a direction indicated by an arrow, thereby promoting smooth sheet transport.
  • FIG. 33 shows another alternative embodiment of the present invention which includes a switch roller in the form of a brush roller 71.
  • the switch roller 71 is provided with a configuration shown in FIG. 34 and is located at the junction of the paths 33 and 34, as shown in FIG. 33.
  • FIG. 35 to steer the sheet P coming out of the fixing unit 19, FIG. 2, to the path 33, the switch roller 71 is rotated counterclockwise to beat the leading edge of the sheet P toward the path 33.
  • FIG. 36 while the first sheet P1 is still in contact with the switch roller 71, the roller 71 is reversed to rotated clockwise.
  • switch rollers 21, 71, 81 and 91 it is preferable to rotate the switch roller only for a period of time sufficient to guide the leading edge of the sheet P being transported by the inlet roller pair 31 in a desired direction.
  • the switch roller will also be driven by a motor independent of the main motor.
  • the switching device will also selects particular paths alternately. It follows that in the event of duplex printing the switching device can be efficiently controlled only if the control over the front/rear printing of sheets is directly applied.
  • a transport roller pair 87 is located at a position where the paths 132-133 branches off the path 80.
  • Transport rollers 88 and 89 are respectively located on the path 132 downstream of the switch roller pair 84 and on the path 133 downstream of the switch roller pair 84.
  • the rollers 85 and 86 of the switch roller pair 84 are respectively mounted on shafts 104 and 92 which are integrally and rotatably supported by opposite support plates 93 and 94 via bearings, not shown.
  • a gear 95 is mounted on one end of the shaft 104 while a drive gear 97 is mounted on the drive shaft 96 and capable of meshing with the gear 95. As shown in FIG.
  • the drive shaft 96 is held by a support member, not shown, in such a manner as to be slidable in a direction indicated by an arrow F.
  • the drive shaft 96 is driven by, for example, a solenoid to move between a position where the drive gear 97 meshes with the gear 95 (FIG. 46) and a position where the former does not mesh with the latter (FIG. 47).
  • the drive shaft 96 with the drive gear 97 is affixed to the output shaft of a drive motor 98, FIG. 46.
  • the drive motor 98 When the drive motor 98 is energized, it causes the roller 85 to rotate in a direction G with the result that the roller 86 is driven by the roller 85 in a direction J.
  • the drive motor 103, second drive shaft 101, shaft 102 and opposite support plates 93 and 94 constitute the second drive means 100.
  • the second drive means 100 causes the switch roller pair 84 to bodily rotate for guiding the sheet P to either of the directions C and D, as needed.
  • the drive motor 103 is implemented by a stepping motor so as to locate the switch roller pair 84 at the home position of FIGS. 45 and 46 with ease.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Paper Feeding For Electrophotography (AREA)
EP93302589A 1992-04-01 1993-04-01 Umschaltvorrichtung für den Blattransportweg in einem Bilderzeugungsgerät Expired - Lifetime EP0564291B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP7963092 1992-04-01
JP79630/92 1992-04-01
JP11613092 1992-05-08
JP116130/92 1992-05-08
JP01243193A JP3257712B2 (ja) 1992-04-01 1993-01-28 搬送路切換装置
JP12431/93 1993-01-28

Publications (3)

Publication Number Publication Date
EP0564291A2 true EP0564291A2 (de) 1993-10-06
EP0564291A3 EP0564291A3 (de) 1994-01-19
EP0564291B1 EP0564291B1 (de) 1996-11-27

Family

ID=27279828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93302589A Expired - Lifetime EP0564291B1 (de) 1992-04-01 1993-04-01 Umschaltvorrichtung für den Blattransportweg in einem Bilderzeugungsgerät

Country Status (4)

Country Link
EP (1) EP0564291B1 (de)
JP (1) JP3257712B2 (de)
DE (1) DE69306151T2 (de)
ES (1) ES2095007T3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102696A1 (en) * 2001-06-14 2002-12-27 De La Rue International Limited Sheet diverting assembly
EP1847493A2 (de) * 2006-04-19 2007-10-24 Ricoh Company, Ltd. Bogenfördervorrichtung, Bildabtastvorrichtung und Bildgebungsvorrichtung
ITBO20090611A1 (it) * 2009-09-24 2011-03-25 C M C Srl Sistema per indirizzare articoli in foglio da una linea di ingresso verso due linee di uscita
US20120228824A1 (en) * 2009-11-06 2012-09-13 Goss International Americas, Inc. Apparatus for Electronically Diverting Signatures
EP3301049A1 (de) * 2016-09-30 2018-04-04 Canon Kabushiki Kaisha Blattfördervorrichtung und bilderzeugungsvorrichtung mit einer einrichtung zur richtungsumkehr von blättern

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH082775A (ja) * 1994-06-14 1996-01-09 Ricoh Co Ltd 排紙装置
JP3465032B2 (ja) * 1994-07-21 2003-11-10 コニカミノルタホールディングス株式会社 画像形成装置
US6341777B1 (en) * 2000-03-02 2002-01-29 Xerox Corporation Multiple-position idler roller
KR100445343B1 (ko) * 2002-05-10 2004-08-25 (주)케이알디씨 용지경로변경장치
JP2006199452A (ja) * 2005-01-21 2006-08-03 Kyocera Mita Corp シート搬送装置及びそれを備えた画像形成装置
JP4837592B2 (ja) * 2006-05-29 2011-12-14 株式会社リコー 記録媒体搬送装置および画像形成装置
KR100915269B1 (ko) * 2008-09-01 2009-09-03 이계설 리튬 이온전지의 분리막 연결장치 및 방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052455A (ja) 1983-08-30 1985-03-25 Fuji Xerox Co Ltd 用紙経路切換え装置
EP0407151A2 (de) 1989-07-03 1991-01-09 Xerox Corporation Drehbare Bürste zur Wegeauswahl

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4725453Y1 (de) * 1970-11-11 1972-08-08
JPS5576318U (de) * 1978-11-21 1980-05-26
JPS57203648A (en) * 1981-06-09 1982-12-14 Canon Inc Sheet branch device
DE8717500U1 (de) * 1987-10-19 1988-12-08 Jagenberg AG, 4000 Düsseldorf Bänderschleuse für Zuschnitte aus steifem Material, insbesondere zusammengelegte Faltschachteln
JPH02105830A (ja) * 1988-10-14 1990-04-18 Osaka Gas Co Ltd 炭素繊維製組紐の製造方法
JPH04368549A (ja) * 1991-06-18 1992-12-21 Mitsui Constr Co Ltd 構造用材料

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052455A (ja) 1983-08-30 1985-03-25 Fuji Xerox Co Ltd 用紙経路切換え装置
EP0407151A2 (de) 1989-07-03 1991-01-09 Xerox Corporation Drehbare Bürste zur Wegeauswahl

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102696A1 (en) * 2001-06-14 2002-12-27 De La Rue International Limited Sheet diverting assembly
US6929262B2 (en) 2001-06-14 2005-08-16 De La Rue International Limited Sheet diverting assembly
CN100337892C (zh) * 2001-06-14 2007-09-19 德拉鲁国际公司 薄片转移组件
CN101058375B (zh) * 2006-04-19 2010-09-29 株式会社理光 纸张传送装置,图像扫描设备和图像形成设备
EP1847493A3 (de) * 2006-04-19 2008-01-02 Ricoh Company, Ltd. Bogenfördervorrichtung, Bildabtastvorrichtung und Bildgebungsvorrichtung
KR100908020B1 (ko) 2006-04-19 2009-07-15 가부시키가이샤 리코 용지 이송 장치, 화상 스캔 장치 및 화상 형성 장치
EP1847493A2 (de) * 2006-04-19 2007-10-24 Ricoh Company, Ltd. Bogenfördervorrichtung, Bildabtastvorrichtung und Bildgebungsvorrichtung
US7992858B2 (en) 2006-04-19 2011-08-09 Ricoh Company, Ltd. Sheet conveying apparatus, image scanning apparatus, and image forming apparatus
ITBO20090611A1 (it) * 2009-09-24 2011-03-25 C M C Srl Sistema per indirizzare articoli in foglio da una linea di ingresso verso due linee di uscita
WO2011036635A3 (en) * 2009-09-24 2011-05-19 C.M.C. S.R.L. A system for directing sheet articles in arrival from an input line towards two output lines
US8690153B2 (en) 2009-09-24 2014-04-08 C.M.C S.r.l. System for directing sheet articles in arrival from an input line towards two output lines
US20120228824A1 (en) * 2009-11-06 2012-09-13 Goss International Americas, Inc. Apparatus for Electronically Diverting Signatures
US8602413B2 (en) * 2009-11-06 2013-12-10 Goss International Americas, Inc. Apparatus for electronically diverting signatures
EP3301049A1 (de) * 2016-09-30 2018-04-04 Canon Kabushiki Kaisha Blattfördervorrichtung und bilderzeugungsvorrichtung mit einer einrichtung zur richtungsumkehr von blättern
US10106350B2 (en) 2016-09-30 2018-10-23 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus

Also Published As

Publication number Publication date
EP0564291B1 (de) 1996-11-27
EP0564291A3 (de) 1994-01-19
DE69306151T2 (de) 1997-04-17
JP3257712B2 (ja) 2002-02-18
JPH0624620A (ja) 1994-02-01
ES2095007T3 (es) 1997-02-01
DE69306151D1 (de) 1997-01-09

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