Patent ID: 8167303

Claim:
A sheet processing apparatus comprising: a sheet discharge portion configured to discharge a sheet; a sheet stacking portion on which the sheet, discharged by the sheet discharge portion, is stacked, the sheet stacking portion having a sheet stacking surface which is inclined; a sheet processing portion configured to process the sheet stacked on the sheet stacking portion; a sheet receiving member which receives a lower end of the sheet which is discharged to the sheet stacking portion, and is movable in a direction along an inclination of the sheet stacking surface; a gripping member which grips an upper end portion of the sheet received by the sheet receiving member, and is movable in the direction along the inclination of the sheet stacking surface while gripping the upper end portion of the sheet; a moving unit which moves the gripping member in the direction along the inclination of the sheet stacking surface; and a controlling portion configured to control the moving unit so that the gripping member is moved in the direction along the inclination of the sheet stacking surface from a lower position where the gripping member grips the upper end portion of the sheet received by the sheet receiving member to an upper position, located above the lower position, corresponding to the sheet processing portion when the sheet processing portion processes the sheet.