JP2010126316A5 - - Google Patents

Description

In order to achieve the above object, the present invention provides a sheet stacking unit for stacking conveyed sheets and a sheet bundle composed of a plurality of sheets stacked on the sheet stacking unit at a predetermined processing position. Processing means for selectively performing processing, sheet bundle gripping means for gripping and moving the sheet bundle stacked on the sheet stacking means to the processing position, and gripping by the sheet bundle gripping means and moving to the processing position A sheet bundle pressing unit that presses the sheet bundle to the sheet stacking unit upstream of the sheet bundle gripping unit in the sheet bundle moving direction ;
Characterized in that it have a.

Claims (10)

A sheet stacking means for stacking the conveyed sheets;
Processing means for selectively performing processing at a predetermined processing position on a sheet bundle composed of a plurality of sheets stacked on the sheet stacking means;
A sheet bundle gripping means for gripping and moving the sheet bundle stacked on the sheet stacking means to the processing position;
A sheet bundle holding unit that holds the sheet bundle held by the sheet bundle holding unit and moved to the processing position to the sheet stacking unit on the upstream side in the sheet bundle moving direction from the sheet bundle holding unit;
Sheet processing apparatus characterized by have a. The sheet processing apparatus according to claim 1, wherein the sheet bundle pressing unit includes a rotating body that is in contact with the sheet bundle moved to the processing position and is rotatable in the sheet bundle moving direction. The rotational speed at which the rotating body rotates in contact with the sheet bundle moved to the processing position is slower than the moving speed at which the sheet bundle gripping means grips and moves the sheet bundle moved to the processing position. The sheet processing apparatus according to claim 2.   4. The sheet processing apparatus according to claim 2, wherein the rotating body abuts on a sheet bundle that is gripped and moved by the sheet bundle gripping unit and rotates following the action of a one-way clutch. The sheet processing apparatus according to claim 1, wherein the sheet bundle pressing unit includes a regulating member that presses the sheet bundle at a position corresponding to a thickness of the sheet bundle stacked on the sheet stacking unit. The sheet stacking means has an inclined sheet stacking surface,
The sheet bundle gripping means receives and holds the lower end portion of the sheets stacked on the sheet stacking surface, and grips the end portion of the held sheet bundle of the plurality of sheets to the processing position. The sheet processing apparatus according to any one of claims 1 to 5, wherein the sheet processing apparatus is moved. The sheet processing apparatus according to claim 1, wherein the processing unit is a pair of rollers that sandwich and move the sheet bundle moved to the processing position and fold it in half. . 8. The sheet bundle gripping unit moves to a position where the gripping of the sheet bundle is released before the processing by the processing unit after the sheet bundle is moved to the processing position. The sheet processing apparatus according to any one of the above. 9. The sheet bundle pressing unit moves to a position where the sheet bundle is released after the sheet bundle is moved to the processing position and before the processing by the processing unit. The sheet processing apparatus according to any one of the above.   An image forming unit that forms an image on a sheet, and a sheet processing apparatus according to any one of claims 1 to 9, which selectively performs processing on a sheet bundle including a plurality of sheets on which images are formed And an image forming apparatus.