Sheet processing device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2016002000-A1
Application number	US-201514790129-A
Country	US
Kind code	A1
Filing date	Jul 2, 2015
Priority date	Jul 3, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

According to an aspect of the present invention, there is provided a sheet processing device including a first teeth portion, a second teeth portion that clamps and binds a sheet bundle with the first teeth portion, a first support portion supporting the first teeth portion, a shaft, and a second support portion supporting the second teeth portion. The second support portion includes first and second arm members integrally supported to be capable of swinging around the shaft between a binding position in which the second teeth portion clamps and binds the sheet bundle with the first teeth portion and a standby position in which the second teeth portion is apart from the first teeth portion. The second arm member is provided over the first arm member so as to cover a part of the first arm member.

First claim

What is claimed is:

1 . A sheet processing device comprising:
a first teeth portion; a second teeth portion that clamps and binds a sheet bundle with the first teeth portion; a first support portion supporting the first teeth portion; a shaft; and a second support portion supporting the second teeth portion, the second support portion including:
first and second arm members integrally supported to be capable of swinging around the shaft between a binding position in which the second teeth portion clamps and binds the sheet bundle with the first teeth portion and a standby position in which the second teeth portion is apart from the first teeth portion, the second arm member being provided over the first arm member so as to cover a part of the first arm member.

2 . The sheet processing device according to claim 1 , wherein the second support portion receives a load applied to the second teeth portion dispersedly by the first and second arm members in a state where the first and second support portions are positioned in the binding position.

3 . The sheet processing device according to claim 2 , wherein the second arm member regulates deflection of the first arm member in the binding position.

4 . The sheet processing device according to claim 3 , wherein the second teeth portion is provided in the first arm member, and
wherein the second arm member is disposed apart from the first teeth portion in a state where the second support portion is positioned in the standby position and regulates the first teeth portion by being in contact with the first arm member deflecting in a direction separated from the first teeth portion in the binding position.

5 . The sheet processing device according to claim 4 , wherein the first and second arm members are plate members and a plate thickness of the first arm member is thinner than a plate thickness of the second arm member.

6 . The sheet processing device according to claim 1 , wherein the first arm member is a plate member of a U-shaped cross section including a first top plate portion and a pair of first side surface portions formed by bending both end portions of the first top plate portion, and
wherein the second arm member is a plate member of a U-shaped cross section including a second top plate portion and a pair of second side surface portions formed by bending both end portions of the second top plate portion.

7 . The sheet processing device according to claim 6 , wherein the second teeth portion is provided in the first arm member and a plate thickness of the first arm member is thinner than a plate thickness of the second arm member.

8 . The sheet processing device according to claim 6 , wherein each of the first side surface portions includes a first through hole through which the shaft passes, and
wherein each of the second side surface portions includes a second through hole through which the shaft passes.

9 . The sheet processing device according to claim 8 , wherein the first arm member includes first bending portions formed in a circular arc shape between the first top plate portion and each of the first side surface portions, and
wherein a distance between a surface, on a side opposite to a surface facing the second top plate portion, of the first top plate portion and each first through hole is set to a sum of twice the plate thickness of the first arm member and a radius of an inner surface of one of the first bending portions.

10 . The sheet processing device according to claim 9 , wherein the radius of the inner side surface of one of the first bending portions is set to a half of the plate thickness of the first arm member.

11 . The sheet processing device according to claim 8 , wherein the second arm member includes second bending portions formed in a circular arc shape between the second top plate portion and each of the second side surface portions, and
wherein a distance between a surface, on side opposite to a surface facing the first top plate portion, of the second top plate portion and each second through hole is set to be greater than a sum of twice the plate thickness of the second arm member and a radius of an inner surface of one of the second bending portions, and smaller than three times the plate thickness of the second arm member.

12 . The sheet processing device according to claim 11 , wherein the radius of the inner side surface of one of the second bending portions is set to a half of the plate thickness of the second arm member.

13 . The sheet processing device according to claim 1 , wherein the first support portion is a plate member of which an external dimension is greater than that of the second arm member, and
wherein the plate thickness of the first support portion is thicker than the plate thickness of the second arm member.

14 . The sheet processing device according to claim 1 , further comprising:
a cam that presses one end of the second support portion and swings the second support portion around the shaft.

15 . The sheet processing device according to claim 14 , wherein the second support portion includes a coupling portion that is disposed between the shaft and the one end of the second support portion, and connects the first arm member and the second arm member.

16 . An image forming apparatus comprising:
an image forming portion that forms an image on a sheet; and the sheet processing device according to claim 1 that binds the sheet on which the image is formed by the image forming portion.

Assignees

• Canon Kk

Inventors

• Abe Hideto

Classifications

• G03G15/6544

  Details about the binding means or procedure · CPC title

• B65H37/04 Primary

  for securing together articles or webs, e.g. by adhesive, stitching or stapling (adhering replacement to expiring web during change of web roll B65H19/18) · CPC title

• G03G2215/00822

  Binder, e.g. glueing device · CPC title

• B65H2801/27

  Devices located downstream of office-type machines · CPC title

• B65H2301/5126

  Embossing, crimping or similar processes · CPC title