SHEET DISCHARGING DEVICE, SHEET PROCESSING APPARATUS, IMAGE FORMING SYSTEM AND SHEET DISCHARGING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain favorable alignment accuracy by surely preventing clinging and buckling of a sheet.SOLUTION: A sheet discharging device includes: a pair of sheet discharging rollers 6 that discharge each of sheets conveyed thereto; a shift tray 202 on which the sheets discharged by the pair of sheet discharging rollers 6 are to be stacked; an air blower 400; and a CPU. The air blower 400 forms an air layer AL between the shift tray 202 and a sheet P1 when the sheet P1 is discharged by the pair of sheet discharging rollers 6, or between a sheet P2 and the sheet P1 that is already placed on the shift tray 202 when the sheet P2 is discharged. The CPU controls an air velocity of air to be delivered by the air blower 400 based on sheet information, thereby causing the air layer AL to spread on the entire surface of the sheet.