Canon Finetech Nisca Inc.

A guide portion guides a binding unit in a first direction and a second direction. The guide portion includes a pair of first wall portions, a pair of second wall portions, a pair of third wall portions, and a restricting portion. A first protrusion is engageable between the pair of first wall portions and between the pair of second wall portions. A second protrusion is disposed upstream of the first protrusion in the first direction, and is engageable with the pair of first wall portions and the pair of third wall portions. The restricting portion restricts entry of the first protrusion from between the pair of first wall portions to between the pair of third wall portions and permits entry of the second protrusion from between the pair of first wall portions to between the pair of third wall portions.

A finisher for binding a sheet bundle includes a conveying portion for conveying sheets, a stacking portion for stacking the sheets, a manual setting portion to which the sheet bundle is inserted by an operator, a stapler having a head at a front portion thereof for binding the sheet bundle by a staple and a cartridge at a rear portion for housing the staple, a stapler moving unit for moving the stapler to a first stapling position for binding a corer portion of the sheet bundle, a second stapling position for binding the sheet bundle inserted into the manual setting portion and a staple loading position for removing the cartridge and replenishing a new cartridge, and a moving unit for rotating the stapler to a posture such that the rear portion rather than the front portion of the stapler is located at a front side in the depth direction.

In a case where a binding unit performs a binding process at the corner portion on a first end side in a width direction of the sheet in the second posture, an abutment operation of conveying the sheet and abutting the downstream end edge of the sheet in a conveyance direction against the abutment portion, and a shift operation of moving the sheet to a position where the sheet does not contact a back side surface of the binding unit when the binding unit is in the second posture, on a second end side in the width direction with respect to a position of the sheet conveyed to the placement portion are performed. Then a movable turning unit turns the binding unit from a first posture to the second posture, and the binding process is performed by the binding unit in the second posture.

A sheet stacking apparatus ( 100 ) includes a conveyance unit ( 512, 513, 514 ), a discharge unit ( 515 ), a stacking unit ( 751 ) that stacks the sheet being discharged by the discharge unit, and a control unit ( 636 ) that stops a stacking operation of the sheet to the stacking unit according to an amount of sheets stacked on the stacking unit. The control unit stops the stacking operation of the sheet on the stacking unit in response to having a first amount of sheets being stacked on the stacking unit, in a case where a sheet having no perforation provided thereon is stacked on the stacking unit, and stops the stacking operation of the sheet on the stacking unit in response to having an amount of sheets that is smaller than the first amount being stacked on the stacking unit, in a case where a sheet having a perforation provided thereon is stacked on the stacking unit.

A sheet processing apparatus includes a processing unit, a braking mechanism, and, a damper mechanism. The processing unit is movable to a drawn-out position and an accommodated position. The drawn-out position is a position where the processing unit is drawn out from the sheet processing apparatus. The accommodated position is a position where the processing unit is accommodated in the sheet processing apparatus. The braking mechanism acts to brake the processing unit in a case where the processing unit is inserted in a direction from the drawn-out position toward the accommodated position at a speed equal to or higher than a predetermined speed. The damper mechanism absorbs an impact on the braking mechanism in a case where the braking mechanism act, by applying a load to the processing unit moving in the direction from the drawn-out position toward the accommodated position.

A sheet processing apparatus includes a plurality of casters, a processing unit, another caster and a support portion. The plurality of casters movably support the sheet processing apparatus. The processing unit is provided to be capable of being drawn out from and inserted into the sheet processing apparatus. The other caster is provided in the processing unit and comes into contact with an installation surface and supports the processing unit in a case where the processing unit moves in a draw-out direction. The support portion supports the other caster such that the other caster is movable to an accommodation position and a support position and move the other caster from the support position to the accommodation position in accordance with an operation of inserting the processing unit.

A sheet processing apparatus includes a pair of clamp units, a first pressing unit and a second pressing unit. The first pressing unit performs a square back process on a spine of the sheet bundle by moving the first pressing unit in a width direction of the sheet bundle in a state in which the spine of the sheet bundle is pressed toward the pair of clamp units. The second pressing unit performs a pressing process on a folding line of the sheet bundle by moving in the width direction of the sheet bundle while nipping the folding line of the sheet bundle.

A sheet processing apparatus includes: a control unit configured to control at least one of a pair of side edge alignment plates such that the one of the pair of side edge alignment plates is located at a position where the side edge alignment plate can come into contact with an inner side of a sheet in a widthwise direction, which is shifted by a shift unit.

A sheet binding processing apparatus includes a control unit configured to, when performing the binding process for continuously binding a sheet bundle including a predetermined sheet which is larger than a predetermined length in a conveyance direction, control a conveyance unit, a buffer conveyance unit, and an upper conveyance unit such that a sheet that forms a subsequent sheet bundle is sent from a conveyance path to an upper branching path, and the sheet is then conveyed in a switchback direction from an upper branching path to a buffer path.

A sheet stacking apparatus includes a stacking tray, a lowering unit, a conveyance unit, a first action unit and a second action unit, and a permitting portion. The stacking tray stacks sheets. The lowering unit lowers the stacking tray as the sheets are stacked. The conveyance unit conveys a sheet toward the stacking tray. The first action unit and the second action unit act on both edge ends in a width direction of a sheet bundle stacked on the stacking tray to align the sheet bundle. The permitting portion permits a next sheet to be temporarily received above the stacking tray when the first action unit and the second action unit are aligning the sheet bundle.