Sheet conveying apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2017129727-A1
Application number	US-201715409681-A
Country	US
Kind code	A1
Filing date	Jan 19, 2017
Priority date	Feb 8, 2012
Publication date	May 11, 2017
Grant date	—

Abstract

A sheet conveying apparatus including: a locking member having an abutment surface abutting a sheet to correct skew feed of the sheet; a holding member configured to hold the locking member to rotate from a waiting position when the locking member is pushed by the sheet; a roller pair configured to nip the sheet abutting the abutment surface; a first urging portion configured to urge the holding member to the waiting position; a movable support portion configured to support the locking member in a manner that the locking member is located a retracted position where the locking member contacts a surface of the sheet and allows the sheet to pass; and a second urging portion configured to urge the locking member to a position where the abutment surface abuts a succeeding sheet.

First claim

1 . A sheet conveying apparatus, comprising:
an abutment a locking member having an abutment surface against which a leading edge of a sheet being conveyed abuts so as to correct a skew feed of the sheet; and a holding member having a positioning portion and configured to hold the abutment member, wherein the abutment member is movable between an abutment position in which the abutment member is positioned with respect to the holding member while contacting the positioning portion so that the leading edge of the sheet abuts against the abutment surface and a retracted position in which positioning of the abutment member with respect to the holding member is released and the leading edge of the sheet does not abut against the abutment surface, wherein the holding member is movable between a first position positioned and a second position retracted from the first position, wherein the abutment surface is pushed by the leading edge of the sheet in a waiting state in which the abutment member is located at the abutment position and the holding member is located at the first position, and the holding member is moved from the first position toward the second position while the abutment member contacts the positioning portion, and wherein the holding member is moved in a direction away from the first position so that the leading edge of the sheet is separated from the abutment surface, and the holding member is moved from the second position to the first position in a state in which the abutment member is pushed by a surface of the sheet to be moved to the retracted position.

2 . A sheet conveying apparatus according to claim 1 , further comprising a first urging portion configured to urge the holding member.

3 . A sheet conveying apparatus according to claim 2 , further comprising a second urging portion configured to urge the holding member.

4 . A sheet conveying apparatus according to claim 1 , wherein the abutment member is rotatable about a first rotary shaft with respect to the holding member.

5 . A sheet conveying apparatus according to claim 4 , wherein the holding member is rotatable about a second rotary shaft different from the first rotary shaft.

6 . A sheet conveying apparatus according to claim 1 , further comprising a conveying portion configured to form a nip portion to nip and convey the sheet, wherein in a case where the holding member is located at the first position, the abutment surface of the abutment member is located upstream of the nip portion in a sheet conveying direction.

7 . A sheet conveying apparatus according to claim 6 ,
wherein the conveying portion comprises a roller pair including a first roller and a second roller, and wherein the holding member is provided on a side of the second roller.

8 . A sheet conveying apparatus according to claim 2 , wherein in a case where the holding member is moved from the first position to the second position, the holding member is moved against an urging force of the first urging portion.

9 . A sheet conveying apparatus according to claim 7 , wherein in a state in which the sheet is nipped by the nip portion and the holding member is located at the second position, the abutment member is located closer to the side of the second roller than the first roller.

10 . A sheet conveying apparatus according to claim 1 , wherein the abutment member is provided in each position of a plurality of positions in a width direction intersecting with a sheet conveying direction.

11 . A sheet conveying apparatus according to claim 1 , further comprising a stopper configured to position the holding member in the first position.

12 . An image forming apparatus comprising:
a sheet conveying apparatus; and an image forming portion configured to form an image on a sheet being conveyed in a state in which a skew feed of the sheet is corrected by the sheet conveying apparatus, the sheet conveying apparatus comprising:
an abutment member having an abutment surface against which a leading edge of a sheet being conveyed abuts so as to correct a skew feed of the sheet; and
a holding member having a positioning portion and configured to hold the abutment member,
wherein the abutment member is movable between an abutment position in which the abutment member is positioned with respect to the holding member while contacting the positioning portion so that the leading edge of the sheet abuts against the abutment surface and a retracted position in which positioning of the abutment member with respect to the holding member is released and the leading edge of the sheet does not abut against the abutment surface, wherein the holding member is movable between a first position positioned and a second position retracted from the first position, wherein the abutment surface is pushed by the leading edge of the sheet in a waiting state in which the abutment member is located at the abutment position and the holding member is located at the first position, and the holding member is moved from the first position toward the second position while the abutment member contacts the positioning portion, and wherein the holding member is moved in a direction away from the first position so that the leading edge of the sheet is separated from the abutment surface, and the holding member is moved from the second position to the first position in a state in which the abutment member is pushed by a surface of the sheet to be moved to the retracted position.

Assignees

• Canon Kk

Inventors

• Iizuka Yoichiro

Classifications

• B65H9/004 Primary

  Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet · CPC title

• B65H5/062

  between rollers or balls · CPC title

• B65H2301/331

  Skewing, correcting skew, i.e. changing slightly orientation of material · CPC title

• B65H9/06

  Movable stops or gauges, e.g. rising and falling front stops {(B65H11/007 takes precedence)} · CPC title

• B65H2801/06

  Office-type machines, e.g. photocopiers · CPC title