US20100133743A1 - Sheet feeding apparutus and image forming apparatus - Google Patents

Sheet feeding apparutus and image forming apparatus Download PDF

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Publication number
US20100133743A1
US20100133743A1 US12/622,903 US62290309A US2010133743A1 US 20100133743 A1 US20100133743 A1 US 20100133743A1 US 62290309 A US62290309 A US 62290309A US 2010133743 A1 US2010133743 A1 US 2010133743A1
Authority
US
United States
Prior art keywords
sheet
side end
sheets
sheet feeding
width direction
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
US12/622,903
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English (en)
Inventor
Ryuji Hamasaki
Yasuhiro Uchida
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Assigned to CANON KABUSHIKI KAISHA reassignment CANON KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UCHIDA, YASUHIRO, HAMASAKI, RYUJI
Publication of US20100133743A1 publication Critical patent/US20100133743A1/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
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/04—Supports or magazines for piles from which articles are to be separated adapted to support articles substantially horizontally, e.g. for separation from top of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/04—Fixed or adjustable stops or gauges
    • 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
    • B65H2405/114—Side, i.e. portion parallel to the feeding / delivering direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/12—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • 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
    • B65H2801/03—Image reproduction devices
    • B65H2801/06—Office-type machines, e.g. photocopiers

Definitions

  • the present invention relates to a sheet feeding apparatus and an image forming apparatus, and in particular, relates to a configuration of a side end regulating mechanism to regulate a side end position in the width direction of sheets supported by a sheet supporting portion.
  • an image forming apparatus such as a copying machine, a printer and a facsimile machine, which forms an image while feeding a sheet to an image forming portion from a sheet feeding apparatus is widely used.
  • a sheet feeding apparatus that a sheet cassette as a sheet supporting portion is detachably attached to an apparatus main body and the sheet accommodated and supported by the sheet cassette is automatically fed to the image forming portion.
  • the sheet cassette provided with an intermediate plate capable of being lifted and lowered so that the sheets are piled thereon and pressed to a sheet feeding roller is utilized for such a sheet feeding apparatus.
  • the sheet cassette having the intermediate plate is provided with a rear end regulating member to regulate a rear end position in the sheet feeding direction (hereinafter, referred to as the rear end) of the sheets which are piled and accommodated on the intermediate plate so that the sheets of various sizes can be accommodated.
  • the sheet cassette is provided with a side end regulating member to regulate a side end position of the sheet in the direction perpendicular to the sheet feeding direction (hereinafter, referred to as the width direction).
  • the sheet side end is regulated by the side end regulating member and the sheet rear end is regulated by the rear end regulating member so that the front end of the sheet is always maintained at a predetermined position. In this manner, stable feeding of the sheets can be performed regardless of the sheet sizes when the sheet cassette is attached to the apparatus main body.
  • the present invention provides a sheet feeding apparatus and an image forming apparatus capable of performing position alignment between sheets supported by a sheet supporting portion and an image forming position of the sheet with a simple configuration and at low cost.
  • the present invention provides a sheet feeding apparatus including a sheet supporting portion which supports a plurality of sheets, a side end regulating mechanism which is arranged in a width direction perpendicular to a sheet feeding direction and regulates a position of the sheets supported by the sheet supporting portion by contacting an end part of the sheets in the width direction, and a sheet feeding portion which feeds the top sheet of the sheets supported by the sheet supporting portion and regulated by the side end regulating mechanism.
  • the side end regulating mechanism includes a reference side regulating portion having a reference surface to be a reference in the sheet width direction for sheet feeding, a side end regulating portion which is arranged to be opposed to the reference side regulating portion with a sheet pressing member to apply a force to the sheets toward the reference surface, and an adjusting portion which changes an incline angle of the reference surface which is supported to be capable of inclining having the lower side of the reference surface as a fulcrum.
  • FIG. 1 is a view which schematically illustrates a printer as an example of an image forming apparatus including a sheet feeding apparatus according to an embodiment of the present invention
  • FIG. 2 is a perspective view of a sheet cassette arranged at the sheet feeding apparatus
  • FIGS. 3A and 3B are explanatory views which illustrate a configuration for moving a side end reference member and a side end regulating member arranged at the sheet cassette in the width direction;
  • FIGS. 4A and 4B are explanatory views which illustrate movement of an intermediate plate arranged at the sheet cassette
  • FIG. 5 is an explanatory view which illustrates a configuration of a sheet pressing member arranged at the side end regulating member
  • FIG. 6 is an explanatory view which illustrates an angle adjusting member arranged at the side end reference member
  • FIGS. 7A and 7B are views which illustrate inclining motion of a side end reference portion by operation of the angle adjusting member
  • FIG. 8 is a view which illustrates an inclined state of the side end reference portion by the operation of the angle adjusting member
  • FIGS. 9A and 9B are enlarged views of a main part of the side end reference portion inclined by the operation of the angle adjusting member
  • FIGS. 10A and 10B are views which illustrate a mark indicating a sheet size formed at the sheet cassette
  • FIG. 11 is an explanatory view which illustrates a configuration of a positioning mechanism to perform positioning of the side end reference member arranged at the sheet cassette;
  • FIGS. 12A and 12B are explanatory views which illustrate another configuration to incline the side end reference portion
  • FIG. 13 is a view which illustrates another configuration of the side end reference portion.
  • FIG. 14 is a view which illustrates an inclined state of a side wall portion of the side end reference portion arranged separately from the side end reference portion by the operation of the angle adjusting member.
  • FIG. 1 is a view which schematically illustrates a printer as an example of an image forming apparatus including a sheet feeding apparatus according to an embodiment of the present invention.
  • FIG. 1 shows a printer 50 , a printer main body 51 as an apparatus main body, an image forming portion 52 which is arranged at the printer main body 51 and performs image forming of an electrophotographic system, and a sheet feeding apparatus 54 which feeds a sheet S to the image forming portion 52 .
  • the image forming portion 52 is provided with a photosensitive drum 53 which forms a toner image and a transfer roller 65 which transfers the toner image formed at the photosensitive drum 53 to the sheet S.
  • a photosensitive drum 53 which forms a toner image
  • a transfer roller 65 which transfers the toner image formed at the photosensitive drum 53 to the sheet S.
  • the sheet feeding apparatus 54 is detachably attached to the printer main body 51 and is provided with a sheet cassette 1 as a sheet piling portion to support a pile of the sheets S and a sheet feeding roller 54 a which constitutes a sheet feeding portion to feed the sheets S accommodated in the sheet cassette 1 .
  • the sheet cassette 1 is provided with an intermediate plate 4 which is movable in the vertical direction to support the pile of the sheet S, a later-mentioned side end regulating member in FIG. 2 to regulate positions of both ends in the width direction perpendicular to the sheet feeding direction of the sheets S, and a rear end regulating member 7 to regulate the rear end of the sheets S.
  • a separation pad 60 which is press-contacted to the sheet feeding roller 54 a is arranged at the downstream side in the sheet feeding direction of the sheet cassette 1 .
  • the separation pad 60 is press-contacted to the sheet feeding roller 54 a by a separation pad spring 61 .
  • the sheets S are carried from the sheet cassette 1 by the sheet feeding roller 54 a at the time of image forming, and then, the sheets S are separated one by one by the separation pad 60 which is press-contacted to the sheet feeding roller 54 a.
  • the sheets S piled at the sheet cassette 1 are carried by friction with the sheet feeding roller 54 a . Then, the sheets S are separated and fed one by one by the separation pad 60 which is press-contacted to the sheet feeding roller 54 a as being applied a force by the separation pad spring 61 .
  • the sheet S is conveyed by a conveying roller 63 and arrives at a pair of registration rollers 64 . Then, the front end of the sheet S is aligned by the pair of registration rollers 64 .
  • a photo-sensor detects passing of the sheet S before arriving at the pair of registration rollers 64
  • the laser light exposure device irradiates laser light to the photosensitive drum 53 .
  • the electrostatic latent image is formed on the photosensitive drum 53 .
  • the electrostatic latent image is visualized.
  • the transfer roller 65 which constitutes a transfer portion, the visualized toner image on the photosensitive drum 53 is transferred to the sheet S.
  • the sheet S on which the toner image is transferred is conveyed to a fixing portion 66 .
  • the sheet S is pressurized and heated when passing through the fixing portion 66 and the toner image is permanently fixed on the sheet S.
  • the sheet S on which the toner image has been fixed is piled on a discharge cassette 70 by pairs of discharge rollers 67 to 69 .
  • the sheet cassette 1 is provided with a cassette main body 3 having a sheet accommodating space 2 to accommodate and support the sheets of various sizes and the intermediate plate 4 arranged at the cassette main body 3 which is a sheet supporting portion to support sheets to be capable of being lifted and lowered to support the pile of the sheets. Further, the sheet cassette 1 is provided with the rear end regulating member 7 to regulate the rear end of the sheets.
  • the sheet cassette 1 is provided with a side end reference portion 5 as a reference side regulating portion which regulates one side end position in the width direction perpendicular to the sheet feeding direction of the sheets and a side end regulating portion 6 which is arranged to be opposed to the side end reference portion 5 and regulates the other side end position in the width direction of the sheets.
  • the side end reference portion 5 and the side end regulating portion 6 constitute the side end regulating mechanism which regulates the side end positions in the width direction of the sheets supported by the sheet cassette 1 .
  • the side end reference portion 5 , the side end regulating portion 6 and the rear end regulating member 7 are configured to be movable corresponding to various sheet sizes.
  • the side end reference portion 5 and the side end regulating portion 6 respectively include racks 11 , 12 mated with a pinion 10 which is arranged at a bottom surface 19 of the cassette main body 3 . Due to the racks 11 , 12 and the pinion 10 , the side end reference portion 5 and the side end regulating portion 6 are moved in the opposite direction to each other by the same distance.
  • FIG. 3A indicates positions of the side end reference portion 5 , the side end regulating portion 6 and the rear end regulating member 7 for accommodating the sheets of the A3 size.
  • FIG. 3B indicates positions of the side end reference portion 5 , the side end regulating portion 6 and the rear end regulating member 7 for accommodating the sheets of the A4 size (smaller than A3 size).
  • the intermediate plate 4 which supports the pile of the sheets is arranged to be capable of being lifted and lowered in parallel with the bottom surface 19 of the sheet cassette 1 with a lifting and lowing mechanism (not illustrated). Then, the sheets are fed sequentially.
  • a sheet upper surface sensor (not illustrated) detects that the position of the top sheet Sa of the sheets S is equal to or lower than a predetermined height
  • the intermediate plate 4 is lifted as illustrated in FIG. 4B . In this manner, the position of the top sheet Sa is maintained within a predetermined height range.
  • the side end regulating portion 6 is provided with two (i.e., a plurality of) sheet pressing members 8 along the sheet feeding direction as pressing members which are press-contacted to the side end (i.e., the end part) of the sheets and applies a force and presses the sheets to be contacted to the side end reference portion 5 as being movable in the width direction. Further, between the sheet pressing member 8 and a side wall portion 6 a of the side end regulating portion 6 , regulation springs 9 are arranged at the upper and lower sides as biasing member to apply a force to the sheet pressing member 8 toward the side end reference member side, as illustrated in FIG. 5 .
  • the sheets S are press-contacted by the sheet pressing member 8 to which a force is applied by the regulation springs 9 which are arranged at the upper and lower sides. Accordingly, as illustrated in FIGS. 4A and 4B , the sheets S are elastically pressed to a side wall portion 5 a of the side end reference portion 5 having a sheet contact surface as a reference surface which is the reference of the sheet width direction for the sheet feeding while being contacted with the sheets S.
  • a side end position in the width direction of the sheets S namely, one side end position of the sheets S to be the reference for the position alignment with the image forming position of the sheet, follows to the position of the side end reference portion 5 .
  • the sheet Since the side end position in the width direction of the sheets S follows to the position of the side end reference portion 5 , the sheet is fed on a side end basis as the side end reference portion 5 being the reference for the sheet feeding. Thus, by feeding the sheet as the side end reference portion 5 being the reference, the position alignment between the sheets and the position of image forming (i.e., image transferring) at the transfer portion in the printer can be performed.
  • the side end reference portion 5 is provided with an angle adjusting member 14 capable of operating sliding to adjust the angle of the side wall portion 5 a against the bottom surface 19 of the sheet cassette 1 .
  • the angle adjusting member 14 is capable of being operated from the upper side of the bottom plate 5 b of the side end reference portion 5 which is parallel to the bottom surface 19 of the sheet cassette 1 .
  • the angle adjusting member 14 is arranged inside an operation opening portion 5 c formed at the bottom plate 5 b of the side end reference portion 5 so as not to disturb the sheet piling. Further, in the present embodiment, as illustrated in FIGS. 7A and 7B , the upper surface of the angle adjusting member 14 is inclined and an inclination surface is formed at a bottom surface 5 d of the bottom plate 5 b to be contacted (i.e., engaged) to the upper surface of the angle adjusting member 14 .
  • the angle adjusting member 14 located as illustrated in FIG. 7A is operated to move in the arrow direction, the angle adjusting member 14 proceeds between the bottom surface 5 d of the side end reference portion 5 and the bottom surface 19 of the cassette main body 3 as illustrated in FIG. 7B .
  • the side end reference portion 5 is swung having an edge part, on which the side wall portion 5 a is vertically formed, of the bottom plate 5 b of the side end reference portion 5 as a fulcrum.
  • the side wall portion 5 a of the side end reference portion 5 is inclined against the bottom surface 19 of the cassette main body 3 .
  • the side end position in the width direction of the top sheet Sa to be fed is moved by ⁇ d when a force is applied to the sheets S in the width direction by the sheet pressing member 8 , as illustrated in FIG. 9A . Due to the movement of the sheets S as described above, the printing position against the fed sheet Sa is also moved by ⁇ d.
  • the reference position in the sheet width direction can be adjusted (i.e., changed) by inclining the side end reference portion 5 with the operation of the angle adjusting member 14 .
  • the rack 11 of the side end reference portion 5 of FIG. 3 is not to be apart from the pinion 10 . Therefore, even when the sheets are pressed to the side wall portion 5 a of the side end reference portion 5 , the side end reference portion 5 is not moved in the width direction.
  • the side end position in the width direction of the sheets S are maintained invariable as well despite of the number of the piled sheets as illustrated in FIGS. 9A and 9B as long as the inclined angle (i.e., the swung angle) of the side end reference portion 5 is constant.
  • FIG. 10 there is a case that a mark 15 indicating a sheet size is formed at the cassette main body 3 , namely, at the intermediate plate 4 in the present embodiment.
  • FIG. 11 there is a case that a positioning mechanism 20 A which performs positioning of the side end reference portion 5 corresponding to the size is arranged between the cassette main body 3 and the side end reference portion 5 .
  • the positioning mechanism 20 A is configured with a positioning member 20 arranged at the side end reference portion 5 , a positioning spring 21 and a groove 22 arranged at the cassette main body 3 .
  • the reference position in the sheet width direction is adjusted by inclining the side end reference portion 5 .
  • the side end reference portion 5 supported to be capable of inclining at the lower side (i.e., the edge part) being the fulcrum is inclined, the position of the side end reference portion 5 is not varied even in the case that the angle adjusting member 14 is inclined.
  • the mark 15 is formed at the intermediate plate 4 or in the case that the positioning mechanism 20 A is provided, even if the side end reference portion 5 is inclined, the mark 15 or the positioning mechanism 20 A is not necessarily moved in accordance with the angle adjustment of the side end reference portion 5 .
  • the positioning adjustment of the positioning mechanism 20 A or the mark 15 is unnecessary, the positioning adjustment in the width direction of the sheets S can be performed with less influence to others.
  • the position alignment between the sheets supported by the sheet cassette 1 and the image forming position of the sheet can be performed with a simple configuration at low cost.
  • the inclined surface is formed at the bottom surface 5 d of the bottom plate 5 b while inclining the upper surface of the angle adjusting member 14 so that the angle adjustment of the side end reference portion 5 can be gently performed, as illustrated in FIG. 7 .
  • the angle adjustment of the side end reference portion 5 may be performed stepwise.
  • a stepped portion is arranged at the bottom surface 5 d of the bottom plate 5 b of the side end reference portion 5 which is engaged with the angle adjusting member 14 and the angle adjusting member 16 having a flat upper surface is slid along the stepped portion, as illustrated in FIG. 12 .
  • the stepwise angle adjustment of the side end reference portion 5 can be performed.
  • the side wall portion 5 a having the sheet contact surface is arranged integrally with the side end reference portion 5 .
  • the present invention is not limited to this.
  • the side wall portion 5 a may be arranged separately from the side end reference portion 5 .
  • the side wall portion 5 a is projected from a side wall main body 5 A of the side end reference portion 5 toward the sheet side as illustrated in FIG. 13 .
  • the side wall portion 5 a is inclined toward the side wall main body 5 A as illustrated in FIG. 14 by operating the angle adjusting member 14 .
  • the side wall portion 5 a may be on the same plane as the side wall main body 5 A.
  • the side end reference portion 5 is inclined by the angle adjusting member in the width widening direction.
  • the present invention is not limited to this.
  • the side end reference portion 5 may be inclined corresponding to the operation of the angle adjusting member in the width narrowing direction by arranging the bottom surface of the bottom plate of the side end reference portion 5 to incline in the reverse direction to the shape in FIG. 7 .
  • the side end regulating mechanism of the present invention is adopted to a sheet cassette.
  • the side end regulating mechanism of the present invention may be adopted to a manual sheet feeding portion (i.e., a multipurpose sheet feeding mechanism).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US12/622,903 2008-11-28 2009-11-20 Sheet feeding apparutus and image forming apparatus Abandoned US20100133743A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-303390 2008-11-28
JP2008303390A JP5178478B2 (ja) 2008-11-28 2008-11-28 シート給送装置及び画像形成装置

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US20100133743A1 true US20100133743A1 (en) 2010-06-03

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US12/622,903 Abandoned US20100133743A1 (en) 2008-11-28 2009-11-20 Sheet feeding apparutus and image forming apparatus

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US (1) US20100133743A1 (enExample)
JP (1) JP5178478B2 (enExample)
CN (1) CN101750926B (enExample)

Cited By (12)

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Publication number Priority date Publication date Assignee Title
US20070290434A1 (en) * 2006-06-19 2007-12-20 Konica Minolta Business Technologies, Inc. Sheet storing device and image forming apparatus provided therewith
US20110024969A1 (en) * 2009-08-03 2011-02-03 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US20120119434A1 (en) * 2010-11-15 2012-05-17 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
EP2487125A1 (en) * 2011-02-14 2012-08-15 Kyocera Document Solutions Inc. Sheet width regulating device and image forming apparatus with sheet width regulating device
CN102862837A (zh) * 2011-07-08 2013-01-09 致伸科技股份有限公司 文件限位机构
CN102992059A (zh) * 2011-09-09 2013-03-27 致伸科技股份有限公司 文件限位机构
US8500117B2 (en) 2011-03-30 2013-08-06 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus with locking portion provided in the cassette body
EP2631205A3 (en) * 2012-02-22 2015-03-25 Kyocera Document Solutions Inc. Sheet loading device, and image forming apparatus having same
US9010748B2 (en) 2012-07-18 2015-04-21 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US20170185025A1 (en) * 2015-12-24 2017-06-29 Ricoh Company, Ltd. Sheet feeding device and image forming apparatus incorporating the sheet feeding device
US9868599B2 (en) 2014-10-10 2018-01-16 Pfu Limited Sheet feeding device
US10543997B2 (en) 2017-08-22 2020-01-28 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus

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Cited By (18)

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Publication number Priority date Publication date Assignee Title
US20070290434A1 (en) * 2006-06-19 2007-12-20 Konica Minolta Business Technologies, Inc. Sheet storing device and image forming apparatus provided therewith
US7866660B2 (en) * 2006-06-19 2011-01-11 Konica Minolta Business Technologies, Inc. Sheet storing device and image forming apparatus provided therewith
US20110024969A1 (en) * 2009-08-03 2011-02-03 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US8302956B2 (en) 2009-08-03 2012-11-06 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus with separation claw and intermittent drive
US20120119434A1 (en) * 2010-11-15 2012-05-17 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
DE102011086305B4 (de) 2010-11-15 2019-10-17 Canon K.K. Blattzuführvorrichtung und bilderzeugungsvorrichtung
US8985571B2 (en) * 2010-11-15 2015-03-24 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US8496243B2 (en) 2011-02-14 2013-07-30 Kyocera Mita Corporation Sheet width regulating device and image forming apparatus with sheet width regulating device
EP2487125A1 (en) * 2011-02-14 2012-08-15 Kyocera Document Solutions Inc. Sheet width regulating device and image forming apparatus with sheet width regulating device
US8500117B2 (en) 2011-03-30 2013-08-06 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus with locking portion provided in the cassette body
CN102862837A (zh) * 2011-07-08 2013-01-09 致伸科技股份有限公司 文件限位机构
CN102992059A (zh) * 2011-09-09 2013-03-27 致伸科技股份有限公司 文件限位机构
EP2631205A3 (en) * 2012-02-22 2015-03-25 Kyocera Document Solutions Inc. Sheet loading device, and image forming apparatus having same
US9010748B2 (en) 2012-07-18 2015-04-21 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US9868599B2 (en) 2014-10-10 2018-01-16 Pfu Limited Sheet feeding device
US20170185025A1 (en) * 2015-12-24 2017-06-29 Ricoh Company, Ltd. Sheet feeding device and image forming apparatus incorporating the sheet feeding device
US10144599B2 (en) * 2015-12-24 2018-12-04 Ricoh Company, Ltd. Sheet feeding device and image forming apparatus incorporating the sheet feeding device
US10543997B2 (en) 2017-08-22 2020-01-28 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus

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CN101750926B (zh) 2013-08-21
JP5178478B2 (ja) 2013-04-10
JP2010126315A (ja) 2010-06-10

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