Sheet crimp-binding device

Patent metadata

Field	Value
Publication number	US-11518642-B2
Application number	US-202117467668-A
Country	US
Kind code	B2
Filing date	Sep 7, 2021
Priority date	Sep 7, 2020
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

In a crimp-binding device, a sheet jam less occurs when binding processing is performed. A sheet crimp-binding device includes: a conveying path along which a sheet is conveyed in a predetermined conveying direction; a placing part on which the sheet conveyed along the conveying path is placed; a stack part provided at a location downstream from the placing part in the sheet conveying direction; a discharge unit that discharges the sheet from the placing part to the stack part; a shift unit that moves the sheet placed on a placing position on the placing part in a direction along a sheet surface and perpendicular to the sheet conveying direction; a crimp-binding unit that applies crimp-binding processing to sheets that have been moved in the direction perpendicular to the sheet conveying direction by the shift unit to a crimp-binding position; a recognition unit that recognizes count information of a sheet.

First claim

The invention claimed is:

1. A sheet crimp-binding device comprising:
a conveying path which guides a sheet in a predetermined conveying direction;
a placing part on which the sheet conveyed along the conveying path is placed;
a stack part provided at a location downstream from the placing part in the sheet conveying direction;
a discharge unit that discharges the sheet from the placing part to the stack part;
a shift unit that moves the sheet placed on a placing position on the placing part in a direction along a sheet surface and perpendicular to the sheet conveying direction;
a crimp-binding unit that applies crimp-binding processing to sheets that have been moved in the direction perpendicular to the sheet conveying direction by the shift unit to a crimp-binding position;
a recognition unit that recognizes count information of a sheet to be fed to the placing part; and
a control unit configured to, when the recognition unit recognizes presence of an additional succeeding sheet in a state where a number of sheets that are moved to the crimp-binding position every time one sheet is placed on the placing part reaches a predetermined maximum number of bindable sheets, move the sheets that have been moved to the crimp-binding position by the shift unit to the placing position and then discharge them to the stack part by means of the discharge unit, align the additional succeeding sheet at the placing position by means of the shift unit, and cancel movement of the succeeding sheet conveyed to the placing part to the crimp-binding position by means of the shift unit.

2. The sheet crimp-binding device according to claim 1 , wherein
when the number of sheets that are positioned at the crimp-binding position is equal to or less than the predetermined maximum number of bindable sheets, the control unit moves the sheet bundle positioned at the crimp-binding position by a predetermined amount in the sheet conveying direction and then applies the crimp-binding processing.

3. The sheet crimp-binding device according to claim 1 , wherein a stapler that applies stapling processing to sheets is disposed at a position near the placing position of the placing part, and the crimp-binding unit is disposed, in a direction perpendicular to the sheet conveying direction, more apart from the placing position than the stapler.

4. An image forming system provided with the sheet crimp-binding device as claimed in claim 1 .

5. The sheet crimp-binding device according to claim 1 , wherein the control unit is configured to discharge the additional succeeding sheet at the placing position to the stack part.

6. A sheet crimp-binding device comprising:
a conveying path which guides a sheet in a predetermined conveying direction;
a placing part which places the sheet discharged from the conveying path on a predetermined discharging position;
a crimp-binding unit that applies crimp-binding processing by pressing a plurality of sheets that has been placed on the discharging position, at a predetermined crimp-binding position different from the discharging position;
a shift unit that moves, perpendicular to the conveying direction, in a width direction along a sheet surface of a sheet placed on the discharging position of the placing part, to thereby move the sheet placed on the discharging position from the discharging position to the crimp-binding position, and to move a sheet that is not applied with the crimp-binding processing after being moved to the crimp-binding position, to the discharging position from the crimp-binding position;
a discharge unit that discharges, from the placing part to a predetermined discharging direction, a plurality of sheets applied with the crimp-binding processing by the crimp-binding unit and the sheet not applied with the crimp-binding processing;
a stack part that is provided at a location downstream from the placing part in the sheet conveying direction, and stacks the sheets discharged from the discharge unit at a predetermined stack position;
a recognition unit that recognizes a number of sheets mounted on the discharging position of the placing part and recognizes presence or absence of a succeeding sheet to be discharged from now onto the discharging position of the placing part; and
a control unit configured to, in a state that the shift unit moves the sheets mounted on the discharging position of the placing part to the crimp-binding position and the number of sheets mounted on the discharging position of the placing part that the recognition unit recognizes reaches a maximum number of sheets that the crimp-binding unit can apply crimp-binding, when the recognition unit recognizes presence of an additional succeeding sheet, control the crimp-binding unit, the shift unit and the discharge unit such that after the shift unit moves the maximum number of sheets at the crimp-binding position to the discharging position without applying the crimp-binding by the crimp-binding unit, the discharge unit starts to discharge the maximum number of sheets to the stack position, and the discharge unit discharges the succeeding sheet to the stack position without moving the succeeding sheet to the crimp-binding position by the shift unit.

7. The sheet crimp-binding device according to claim 6 , wherein the control unit controls the crimp-binding unit, the shift unit and the discharge unit such that before the maximum number of sheets moved from the crimp-binding position to the discharging position by the shift unit is discharged to the stack position by the discharge unit without applying the crimp-binding by the crimp-binding unit after being moved to the crimp-binding position, the shift unit aligns the maximum number of sheets so that a position of the maximum number of sheets moved to the discharging position comes to a same position with the stack position in the width direction.

8. The sheet crimp-binding device according to claim 7 , wherein the control unit controls the crimp-binding unit, the shift and the discharge unit such that before the succeeding sheet is discharged to the stack position by the discharge unit, the shift unit aligns the succeeding sheet so that a position of the succeeding sheet comes to a same position with the stack position in the width direction.

9. An image forming system provided with the sheet crimp-binding device as claimed in claim 8 .

Assignees

• Shimizu Tatsuya
• SHIMIZU Daiju
• Canon Finetech Nisca Inc

Inventors

• Shimizu Tatsuya
• SHIMIZU Daiju

Classifications

• B65H2301/4213

  of a limited number of articles, e.g. buffering, forming bundles · CPC title

• B31F5/001 Primary

  by stapling or riveting · CPC title

• B65H2301/51616

  involving simultaneous deformation of parts of the material to be bound · CPC title

• B65H2405/11151

  with surface inclined upwardly in transport direction · CPC title

• B65H31/3081

  by acting on edge of the pile for moving it along a surface, e.g. by pushing · CPC title