Sheet feeding apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-10407260-B2
Application number	US-201815909550-A
Country	US
Kind code	B2
Filing date	Mar 1, 2018
Priority date	Jun 2, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A cut-out is provided in a lower guide so as to permit a return claw to move between a retracted position and a protruded position. Furthermore, an upper surface of the return claw positioned in the protruded position functions as a guide portion that guides an underside of a sheet that has been manually fed.

First claim

What is claimed is:

1. A sheet feeding apparatus, comprising:
a stack portion on which a sheet is stacked;
a first feed member capable of moving between a first positon in which the sheet stacked on the stack portion is fed and a second position where the first feed member that has moved upwards from the first position is positioned;
a separation member that separates a sheet fed by the first feed member;
a guide portion provided above the stack portion;
a second feed member that is provided above the stack portion and that is capable of feeding a sheet guided by the guide portion toward the separation member; and
a moving member movable to a protruded position where the moving member is protruded toward the guide portion and a retracted position where the moving member is retracted from the protruded position toward the separation member,
wherein the moving member moves the sheet near the separation member towards an upstream side in a feed direction by moving from the retracted position to the protruded position, and
wherein the second feed member feeds the sheet guided by the guide portion and the moving member in a state in which the moving member is positioned in the protruded position.

2. The sheet feeding apparatus according to claim 1 , wherein
the moving member includes another guide portion that guides an underside of the sheet fed by the second feed member.

3. The sheet feeding apparatus according to claim 1 , wherein
the guide portion does not guide the underside of the sheet fed by the first feed member.

4. The sheet feeding apparatus according to claim 1 , wherein
a recess that permits the moving member to move is formed in the guide portion.

5. The sheet feeding apparatus according to claim 4 , wherein
the guide portion includes an extended portion, the extended portion guiding the underside of the sheet, at a position that is the same as a position of the recess in a feed direction and at a position that is different from a position of the recess in a sheet width direction orthogonal to the feed direction.

6. The sheet feeding apparatus according to claim 1 , wherein
the moving member positioned in the protruded position is positioned above an uppermost surface of the sheet stacked on the stack portion.

7. The sheet feeding apparatus according to claim 1 , wherein
the second feed member includes an opening portion, the second feed member feeding the sheet inserted into the opening portion.

8. An image forming apparatus, comprising:
the sheet feeding apparatus according to claim 1 , and
an image forming portion that forms an image on the sheet that has been separated by the separation member.

9. The sheet feeding apparatus according to claim 1 , further comprising:
a conveyance member that opposes the separation member and that conveys the sheet,
wherein the separation member is capable of moving between a contact position in which the separation member abuts against the conveyance member, and a separated position in which the separation member is separated from the conveyance member.

10. The sheet feeding apparatus according to claim 9 , further comprising:
a control unit that controls the first feed member, the second feed member, and the moving member, wherein
the control unit feeds the sheet with the second feed member in a state in which the first feed member is retracted upwards, the moving member is positioned in the protruded position, and the separation member is separated from the conveyance member.

11. A sheet feeding apparatus, comprising:
a stack portion on which a sheet is stacked;
a first feed member capable of moving between a first positon in which the sheet stacked on the stack portion is fed and a second position where the first feed member that has moved upwards from the first position is positioned;
a separation member that separates a sheet fed by the first feed member;
a conveyance member that opposes the separation member and that conveys the sheet;
a guide portion provided above the stack portion;
a second feed member that is provided above the stack portion and that is capable of feeding a sheet guided by the guide portion toward the separation member;
a moving member movable to a protruded position where the moving member is protruded toward the guide portion and a retracted position where the moving member is retracted from the protruded position toward the separation member; and
a control unit that controls the first feed member, the second feed member, and the moving member,
wherein the second feed member feeds the sheet guided by the guide portion in a state in which the moving member is positioned in the protruded position,
wherein the separation member is capable of moving between a contact position in which the separation member abuts against the conveyance member, and a separated position in which the separation member is separated from the conveyance member, and
wherein the control unit feeds the sheet with the second feed member in a state in which the first feed member is retracted upwards, the moving member is positioned in the protruded position, and the separation member is separated from the conveyance member.

Assignees

• Canon Kk

Inventors

• Murakami Atsushi
• Aoki Daisuke
• Shuhama Yu

Classifications

• B65H3/446 Primary

  alternatively, i.e. according to a fixed sequence · CPC title

• G03G2215/00679

  Conveying means details, e.g. roller · CPC title

• G03G15/65

  Apparatus which relate to the handling of copy material (handling sheets or webs in general B65H; for photographic purposes in general G03B) · CPC title

• B65H7/00

  Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles · CPC title

• G03G15/6511 Primary

  Feeding devices for picking up or separation of copy sheets · CPC title