Sheet processing device and image forming device provided with the same

Patent metadata

Field	Value
Publication number	US-10131107-B2
Application number	US-201615202010-A
Country	US
Kind code	B2
Filing date	Jul 5, 2016
Priority date	Jul 6, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

The present invention is to provide a sheet processing device including: a receiving tray capable of accommodating therein a sheet having, at a part thereof, a protruding portion and a sheet not having the protruding portion in a mixed state; a first binding member that binds the accommodated sheet bundle at a substantially center thereof in a sheet conveying direction; a folding section that folds the sheet bundle bound by the first binding member in two; and a second binding member that binds protruding portions of the sheet bundle folded by the folding section on a fore edge side of the sheet bundle. With this configuration, the fore edge side of the folded and saddle-stitched sheet bundle can be bound by temporary binding. Thus, a sheet processing device capable of ensuring the security of a saddle-stitched sheet bundle can be provided.

First claim

What is claimed is:

1. A sheet processing device that binds sheets having different shapes and then folds the sheets, comprising:
a receiving tray capable of accommodating therein a sheet having a protruding portion at a part thereof and a sheet not having the protruding portion in a mixed state;
a regulating member that regulates a leading end of the sheet accommodated in the receiving tray;
a first binding member that binds a sheet bundle regulated by the regulating member at a substantially center thereof in a sheet conveying direction with a staple needle;
a folding section that folds the sheet bundle bound by the first binding member in two;
a second binding member that applies a pressure from a thickness direction of the sheet bundle to deform and performs a pressure-bonding binding on protruding portions of the sheet bundle folded by the folding section on a fore edge side of the sheet bundle;
a detection member that detects presence or absence of the protruding portion of the sheets to be conveyed to the receiving tray; and
a controller that issues an alarm signal when the detection member detects the sheet having the protruding portion is not accommodated in the receiving tray in a mode in which the first binding member is configured to bind the mixed sheets and after the mixed sheets are folded, the second binding member is configured to bind the protruding portions of the resultant sheet bundle.

2. The sheet processing device according to claim 1 , wherein
the sheet having the protruding portion at a part thereof is a sheet having a tab at least in the sheet conveying direction, and the sheet is accompanied in the receiving tray.

3. The sheet processing device according to claim 2 , further comprising a pressing member that is disposed downstream of the folding section in the sheet conveying direction and presses the folded sheet bundle from the thickness direction of the sheet bundle when the pressure-bonding binding is performed by the second binding member.

4. The sheet processing device according to claim 3 , wherein
the pressing member is constituted of a roller pair and configured to convey a saddle-stitched sheet bundle in a sheet discharge direction and to press the sheet bundle with a larger force than that at a conveying time when the binding is performed by the second binding member.

5. The sheet processing device according to claim 4 , wherein
the sheet with the tab is positioned at an outermost side of the sheet bundle to be folded.

6. The sheet processing device according to claim 4 , wherein
the sheets with the tabs are inserted between sheets without the tabs so as to sandwich the sheets without the tabs therebetween, and the resultant sheet bundle is accommodated in the receiving tray.

7. The sheet processing device according to claim 1 , wherein
after the issuance of the alarm signal, the sheets are discharged from the receiving tray after being folded without execution of sheet binding by the first or second binding member.

8. The sheet processing device according to claim 1 , wherein
after the issuance of the alarm signal, the sheet bundle is bound by the first binding member, folded, and then discharged from the receiving tray without execution of sheet binding by the second binding member.

9. An image forming device comprising:
an image forming section that sequentially forms an image onto sheets; and
a sheet processing device that applies predetermined processing onto the sheets from the image forming section, wherein
the sheet processing device has a configuration as claimed in claim 1 .

10. The sheet processing device according to claim 3 , wherein the pressing member comprises a roller pair and configured to convey a saddle-stitched sheet bundle in a sheet discharge direction and to stop a conveyance of the sheet bundle when the binding is performed by the second binding member.

Assignees

• SHIMIZU Daiju
• Saito Takashi
• Kondo Isao
• Canon Finetech Nisca Inc

Inventors

• SHIMIZU Daiju
• Saito Takashi
• Kondo Isao

Classifications

• B65H2301/5161

  Binding processes · CPC title

• B31F5/02 Primary

  by crimping or slotting {or perforating} · CPC title

• B65H2301/43828

  involving simultaneous deformation of at least a part of the articles to be bound · CPC title

• B65H45/18

  Oscillating or reciprocating blade folders (carried on rotary members B65H45/16) · CPC title

• G03G2215/00852

  Temporary binding · CPC title