Abstract: A sheet stacking apparatus includes a gripper configured to discharge a sheet, a plurality of stacker trays arranged in a row and configured to stack the discharged sheet, and a guiding unit configured to guide the discharged sheet to a predetermined position. The plurality of stacking trays are horizontally arranged so that a large number of sheets can be stacked without increasing the size of the sheet stacking apparatus.

Abstract: A sheet stacking apparatus includes a gripper configured to discharge a sheet, a plurality of stacker trays arranged in a row and configured to stack the discharged sheet, and a guiding unit configured to guide the discharged sheet to a predetermined position. The plurality of stacking trays are horizontally arranged so that a large number of sheets can be stacked without increasing the size of the sheet stacking apparatus.

Abstract: A sheet processing apparatus includes a processing tray configured to stack a sheet to be processed, a sheet overlap unit configured to allow a sheet fed while the sheet to be processed is stacked on the processing tray, to be overlaid and made to wait, first and second bundle conveyance rollers configured to convey the sheet to the processing tray from the sheet overlap unit, and a sheet processing apparatus control unit configured to control an overlap operation in the sheet overlap unit, wherein the sheet processing apparatus control unit determines, based on sheet information relating to the sheet fed to the sheet overlap unit, whether a sheet to be then fed is overlaid on the sheet fed to the sheet overlap unit.

Abstract: A sheet processing apparatus to perform stapling includes a sheet stacking portion receiving a sheet for a sheet bundle and a positioning member against which an end of the sheet is abutted to position the sheet bundle. The positioning member is movable to adjust a stapling position on the sheet bundle where a staple processing portion performs a stapling process. After the stapling process is performed, a fold processing portion folds the sheet bundle in two. One of two surfaces of the folded sheet bundle slides on a conveyance guide member while a conveyance guide member guides the folded sheet bundle. The stapling process is performed while the stapling position is previously moved, by a predetermined distance, to an opposite area side of the sheet bundle opposite to an area that becomes the one of two surfaces of the folded sheet bundle when the sheet bundle is folded in two.

Abstract: A sheet processing apparatus capable of improving sheet processing performance and productivity is provided. While sheets are conveyed in a piled state toward a rear-end stopper, displacement is produced between the sheets by a pair of discharge rollers. Even if adhesion occurs between the sheets during conveyance thereof, the adhesion between the sheets can be removed before the sheets come into contact with the rear-end stopper.

Abstract: A sheet stacking device includes a liftable/lowerable sheet stacking portion on which sheets to be ejected are stackable. The sheet stacking portion moves downward as an amount of stacked sheets increases. The sheet stacking device includes a movable member disposed below the sheet stacking portion with a space therebetween, and a detecting portion configured to output a signal in accordance with a position of the movable member. Ejection of the sheet to the sheet stacking portion is stopped on the basis of the signal output from the detecting portion in accordance with downward movement of the movable member.

Abstract: A cutting apparatus configured to cut a sheet or a sheet bundle includes a cutting blade whose blade surface has a plurality of grooves. In the cutting apparatus, a scraping member enters the grooves provided on the blade surface to scrape off cutting scraps remaining after a cutting operation. Accordingly, the cutting apparatus can scrape off cutting scraps from the cutting blade even if the adhesive force of the cutting scraps is great.

Abstract: A sheet punching device includes a first blade, a first die into which the first blade is fitted from a first surface of a sheet to form a punch hole in the sheet, a second blade, and a second die into which the second blade is fitted. The second blade is inserted into the punch hole formed by the first blade from a second surface of the sheet and fitted into the second die.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: The sheet conveyance apparatus includes a controller which controls a moving unit. The moving unit moves a sheet conveyance unit for conveying a sheet toward a direction intersecting with a sheet conveyance direction. The controller performs the control such that a moving speed of a shift moving unit is reduced when a shift amount of the sheet discharged from an image forming apparatus main body is small. Therefore, generation of a noise and vibration can be suppressed to save electric power consumption. When the shift amount of the sheet is large, the moving speed of the shift moving unit can be increased to shorten an operation time necessary to the movement.

Abstract: The present invention relates to a sheet stacking device comprising a discharging portion, a moving portion that holds a downstream end portion of the sheet, a stacking portion and a control portion that controls the discharging portion and the moving portion. The control portion controls at least one of the discharging portion and a moving portion so that the movement velocity of the moving portion is higher than the sheet discharge velocity of the discharging portion, and separates the sheet from the moving portion by using a velocity difference between the movement velocity and the sheet discharge velocity.

Abstract: A sheet processor includes a holding unit for holding a folded batch of sheets, a pressing member for pressing against a folded portion of the batch of sheets, a nipping member for nipping portions of the batch adjacent to the folded portion so as to nip the batch of sheets from opposite directions, and a casing for supporting the pressing member and the nipping member.

Abstract: A sheet-stacking apparatus includes a gripper configured to convey a sheet, two stacker trays stacking sheets arranged in a row, and a support member configured to separately elevate the two stacker trays. The stacker tray is selected according to a sheet length.

Abstract: A sheet-stacking apparatus includes a gripper configured to convey a sheet, two stacker trays stacking sheets arranged in a row, and a support member configured to separately elevate the two stacker trays. The stacker tray is selected according to a sheet length.

Abstract: A sheet processing device includes a pair of gripping rollers which can grip and convey a sheet bundle in a booklet-like form, a pressing roller which presses and flattens the folded back portion of the sheet bundle gripped by the gripping rollers, and a control unit which performs rotation control on the pair of gripping rollers. The control unit controls the gripping rollers so as to stop when the folded back portion of the sheet bundle protrudes from the rollers by a predetermined amount. The pressing roller flattens down the protruding folded back portion when the gripping rollers are stopped by the control unit and is in the state of gripping the sheet bundle.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: A sheet processing apparatus includes: a buffer unit which stores plural supplied sheets with upstream edges in a conveying direction thereof aligned; a processing tray on which sheets discharged from the buffer unit are stacked; and an oscillation roller pair and a return roller which convey the sheet stacked on the processing tray to bring the sheet into abutment against a stopper for receiving the upstream edge of the sheet. The buffer unit is adapted to align the upstream edges of only sheets to be stored before a sheet to be supplied last among the sheets to be stored.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: A stacker includes a plurality of sheet stacking units individually movable upward and downward. Sheets are selectively stacked onto either of the stacker trays. To remove the sheets stacked on one of the stacker trays, a door is opened. In a state where the door is open, the stacker trays moved by respective elevation units are movable only downward. In this manner, accidental upward movement of each of the stacker trays caused by a malfunction of a motor or the like is regulated, whereby damage to the stacker is prevented.

Abstract: A sheet stacking device includes a liftable/lowerable sheet stacking portion on which sheets to be ejected are stackable. The sheet stacking portion moves downward as an amount of stacked sheets increases. The sheet stacking device includes a movable member disposed below the sheet stacking portion with a space therebetween, and a detecting portion configured to output a signal in accordance with a position of the movable member. Ejection of the sheet to the sheet stacking portion is stopped on the basis of the signal output from the detecting portion in accordance with downward movement of the movable member.