Abstract: A sheet bundle discharging apparatus including: a conveyance belt configured to convey and discharge a sheet bundle in a conveyance direction; an attitude changing unit configured to change an attitude of the sheet bundle from a first attitude in which the sheet bundle is apart from the conveyance belt to a second attitude in which the sheet bundle is placed on the conveyance belt; and a receiving member configured to receive an end portion of the sheet bundle, wherein the attitude changing unit allows the end portion of the sheet bundle to pass through a region in which the conveyance belt is provided, in a belt width direction perpendicular to the conveyance direction, and thereafter reach a region in which the receiving member is provided, a friction coefficient between the sheet bundle and the receiving member being smaller than a friction coefficient between the sheet bundle and the conveyance belt.

Abstract: A sheet bundle discharging apparatus including: a conveyance belt configured to convey and discharge a sheet bundle in a conveyance direction; an attitude changing unit configured to change an attitude of the sheet bundle from a first attitude in which the sheet bundle is apart from the conveyance belt to a second attitude in which the sheet bundle is placed on the conveyance belt; and a receiving member configured to receive an end portion of the sheet bundle, wherein the attitude changing unit allows the end portion of the sheet bundle to pass through a region in which the conveyance belt is provided, in a belt width direction perpendicular to the conveyance direction, and thereafter reach a region in which the receiving member is provided, a friction coefficient between the sheet bundle and the receiving member being smaller than a friction coefficient between the sheet bundle and the conveyance belt.

Abstract: A sheet punching device including: a die which has a die hole and is configured to be driven to rotate; a punch configured to move in and out of the die hole to punch a hole in a sheet; and a punch operating unit configured to reciprocate the punch with respect to the die hole in a state in which the punch is opposed to the die hole of the die, to move the punch in and out of the die hole.

Abstract: A stapler includes an enclosing portion that encloses staples, a clinch portion that bends a staple, and a projecting portion that projects the staple from the enclosing portion, inserts the staple to a sheet bundle, and bends the staple in cooperation with the clinch portion to bind the sheet bundle. In addition, a guide portion guides the staple projected by the projecting portion toward the sheet bundle. The guide portion has guide surfaces for guiding the staple from an inlet adapted to receive the inserting ends of the staple to an outlet that is formed narrower than the inlet such that the staple is projected by the projecting portion toward the sheet bundle side, and the projecting portion projects the staple to the guide portion, moves the staple along the guide surfaces to deform the staple in a horseshoe shape, inserts the pair of inserting ends to the sheet bundle, and bends the staple in cooperation with the clinch portion to bind the sheet bundle.

Abstract: Provided is a sheet processing apparatus for performing a bookbinding process by folding a sheet stack, including: a folding roller pair including a first roller and a second roller brought into press contact with the first roller to be contacted/separated with/from the first roller, for conveying the sheet stack while folding the sheet stack; a plurality of urging members capable of urging the second roller in a direction of the first roller; and an urging mechanism for changing a number of the urging members for urging the second roller according to a thickness of the sheet stack to be folded.

Abstract: A stapler of the invention has: an enclosing unit for enclosing a plurality of staples; a clinch unit for bending a pair of inserting portions; a projecting unit for projecting the staples from the enclosing unit, allowing the inserting portions to insert a binding object, bending the inserting portions in cooperation with the clinch unit, and binding the binding object; and a feeding unit for feeding the staple to a position where the staple is projected by the projecting unit while being come into contact with a pressing portion and the pair of inserting portions of the staple.

Abstract: Provided is a sheet processing apparatus for performing a bookbinding process by folding a sheet stack, including: a folding roller pair including a first roller and a second roller brought into press contact with the first roller to be contacted/separated with/from the first roller, for conveying the sheet stack while folding the sheet stack; a plurality of urging members capable of urging the second roller in a direction of the first roller; and an urging mechanism for changing a number of the urging members for urging the second roller according to a thickness of the sheet stack to be folded.