Patent ID: 9150378
Filing Date: 2015-10-06
Classification: B65H

Abstract:
1. A sheet storing apparatus, comprising: a sheet discharging path including a sheet discharging port; a processing tray on which a binding process with collating and stacking is performed on sheets fed through the sheet discharging port; a stack tray including a sheet placement face on which sheets fed through the sheet discharging port or a sheet bundle fed from the processing tray are stacked and stored; tray lifting-lowering means which lifts and lowers the sheet placement face of the stack tray in a sheet stacking direction; sheet holding means which presses an upmost sheet on the stack tray; a level sensor which detects a height position of the upmost sheet on the stack tray in a state that a pressurization force of the sheet holding means is applied; and control means which controls the tray lifting-lowering means, the sheet holding means, and sheet conveyance from the sheet discharging path to the stack tray, the control means provides a first sheet discharge mode in which a sheet is discharged from the sheet discharging path to the stack tray without a post-process performed thereon and a second sheet discharge mode in which a binding-processed sheet bundle is discharged from the processing tray to the stack tray, the sheet holding means includes a sheet pressurizing member which is movable between an operating position engaging with a sheet on the sheet placement face and a retracting position retracting from a side above the sheet placement face, sheet hold shifting means which reciprocates the sheet pressurizing member between the operating position and the retracting position, and pressurizing means which applies a pressurization force to the sheet pressurizing member selecting from two or more different pressurization forces, and the control means controls the pressurizing means so that a pressurization force in the second sheet discharge mode is larger than a pressurization force in the first sheet discharge mode when the sheet pressurizing member presses the upmost sheet on the sheet placement face.