Sheet conveying apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-9938102-B2
Application number	US-201715409681-A
Country	US
Kind code	B2
Filing date	Jan 19, 2017
Priority date	Feb 8, 2012
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

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

The invention claimed is:

1. A 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 configured to hold the abutment member and being movable between a first position in which the holding member is located and a second position in which the holding member is retracted from the first position,
wherein the abutment member has a striking surface which can be stricken on a regulating portion provided on the holding member,
wherein in a state in which the striking surface is stricken on the regulating portion and the leading edge of the sheet is pushing the abutment surface, the holding member is moved from the first position to the second position, and
wherein in a state in which the leading edge of the sheet is disengaged from the abutment surface and the abutment member is pressed by the sheet, the abutment member is rotated with respect to the holding member to separate the striking surface from the regulating portion so that the holding member is moved from the second position to the first position while holding the abutment member which is pressed by the sheet.

2. A sheet conveying apparatus according to claim 1 , wherein after the holding member which is moved from the second position to the first position is located in the first position, the abutment member is rotated with respect to the holding member so that the striking surface is stricken on the regulating portion.

3. A sheet conveying apparatus according to claim 2 , wherein after the state in which the abutment member is pressed by the sheet is released by a trailing edge of the sheet passing the abutment member, the abutment member is rotated with respect to the holding member so that the striking surface is stricken on the regulating portion.

4. A sheet conveying apparatus according to claim 1 , further comprising a first urging portion configured to urge the holding member,
wherein the holding member is moved from the first position to the second position against an urging force of the first urging portion.

5. A sheet conveying apparatus according to claim 1 , further comprising a second urging portion configured to urge the abutment member in a direction in which the striking surface is stricken on the regulating portion,
wherein the abutment member is pressed by the sheet so as to be rotated against an urging force of the second urging portion.

6. A sheet conveying apparatus according to claim 1 , wherein the abutment member is rotated about a first rotary shaft with respect to the holding member and rotated about a second rotary shaft different from the first rotary shaft so that the holding member is moved between the first position and the second position.

7. 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 state in which the holding member is located in the first position and the striking surface is stricken on the regulating portion, the abutment surface of the abutment member is located upstream of the nip portion with respect to a sheet conveying direction.

8. 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.

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

10. An image forming apparatus comprising:
an image forming portion configured to form an image on a sheet being conveyed;
an abutment member provided upstream of the image forming portion with respect to a sheet conveying direction and having an abutment surface against which a leading edge of the sheet being conveyed abuts so as to correct a skew feed of the sheet; and
a holding member configured to hold the abutment member and being movable between a first position in which the holding member is located and a second position in which the holding member is retracted from the first position,
wherein the abutment member has a striking surface which can be stricken on a regulating portion provided on the holding member,
wherein in a state in which the striking surface is stricken on the regulating portion and the leading edge of the sheet is pushing the abutment surface, the holding member is moved from the first position to the second position, and
wherein in a state in which the leading edge of the sheet is disengaged from the abutment surface and the abutment member is pressed by the sheet, the abutment member is rotated with respect to the holding member to separate the striking surface from the regulating portion so that the holding member is moved from the second position to the first position while holding the abutment member which is pressed by the sheet.

11. An image forming apparatus according to claim 10 , wherein after the holding member which is moved from the second position to the first position is located in the first position, the abutment member is rotated with respect to the holding member so that the striking surface is stricken on the regulating portion.

12. An image forming apparatus according to claim 11 , wherein after the state in which the abutment member is pressed by the sheet is released by a trailing edge of the sheet passing the abutment member, the abutment member is rotated with respect to the holding member so that the striking surface is stricken on the regulating portion.

13. An image forming apparatus according to claim 10 , further comprising a first urging portion configured to urge the holding member,
wherein the holding member is moved from the first position to the second position against an urging force of the first urging portion.

14. An image forming apparatus according to claim 10 , further comprising a second urging portion configured to urge the abutment member in a direction in which the striking surface is stricken on the regulating portion,
wherein the abutment member is pressed by the sheet so as to be rotated against an urging force of the second urging portion.

15. An image forming apparatus according to claim 10 , wherein the abutment member is rotated about a first rotary shaft with respect to the holding member and rotated about a second rotary shaft different from the first rotary shaft so that the holding member is moved between the first position and the second position.

16. An image forming apparatus according to claim 10 , further comprising a conveying portion configured to form a nip portion to nip and convey the sheet,
wherein in a state in which the holding member is located in the first position and the striking surface is stricken on the regulating portion, the abutment surface of the abutment member is located upstream of the nip portion with respect to the sheet conveying direction.

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

18. An image forming apparatus according to claim 10 , further comprising a stopper configured to locate the holding member in the first position.

Assignees

• Canon Kk

Inventors

• Iizuka Yoichiro

Classifications

• B65H5/062

  between rollers or balls · CPC title

• B65H9/20 Primary

  Assisting by photoelectric, sonic, or pneumatic indicators · CPC title

• B65H9/004 Primary

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

• B65H9/14

  Retarding or controlling the forward movement of articles as they approach stops · CPC title

• B65H2404/725

  retractable · CPC title