A sheet processing device includes a tape binding processing unit, a paper discharge unit, and a control unit. The tape binding processing unit performs tape binding processing on a sheet bundle. The paper discharge unit discharges the sheet bundle subjected to the tape binding processing onto a paper discharge tray. The control unit is configured to control at least one of the tape binding processing unit and the paper discharge unit, such that a first tape binding of the first bundle of sheets and a second tape binding of the second bundle of sheets are not in contact with each other when the first bundle of sheets and the second bundle of sheets are stacked on the paper discharge tray.

A sheet conveying apparatus includes first and second roller members fixed to a rotatable shaft, a first follower roller that cooperates with the first roller member to form a conveying nip, and a second follower roller that cooperates with the second roller member to form a conveying nip. The first and second roller members have outer periphery cut-away parts and the first and second follower rollers are moveably supported and can be biased to home positions. If the first roller member cut-away part faces the first follower roller, the first follower roller is biased to move toward a home position while the nip of the second roller member nips and conveys a sheet. If the second roller member cut-away part faces the second follower roller, the second follower roller is biased to move toward a home position while the nip of the first roller member nips and conveys a sheet.

A transport device includes a drive roller and a driven roller. The drive roller transports paper-sheets in a predetermined transport direction by rotation thereof. The driven roller rotates with rotation of the drive roller, and regardless of from which direction the paper-sheets hit a contact point with the first roller, moves in a direction diagonally forward than a vertical direction with respect to the transport direction. The transport device further includes a bearing groove formed so that a shaft of the driven roller moves in a direction diagonally forward than the vertical direction with respect to the transport direction along an inclined surface.

A sheet conveying apparatus includes a conveying roller, a pinch roller, a holding member, and a pressing device. The pinch roller includes a roller shaft and a roller body rotatable relative to the roller shaft. The roller shaft includes a first end portion and a second end portion. The holding member holds the roller shaft movably in a first direction. The pressing device presses the roller shaft in a pressing direction such that the roller body is pressed against a peripheral surface of the conveying roller. The first end portion of the roller shaft has a first contact surface being a planar surface. The second end portion of the roller shaft has a second contact surface being a planar surface. The roller shaft is disposed such that the first contact surface and the second contact surface are oriented in the pressing direction.

A sheet conveying device includes a sheet stacking part, a conveying path and a conveying roller. The conveying roller includes a drive roller and a driven roller which is pressed against the drive roller and is driven by the drive roller to be rotated. The drive roller has a rotating drive shaft and a drive roller body rotatable together with the rotating drive shaft. The driven roller has a rotating shaft and a driven roller body supported by the rotating shaft in a rotatable manner. The driven roller body has a plurality of roller parts which are arranged in an axial direction of the rotating shaft and pressed against the drive roller body.

A sheet conveyance apparatus includes an inner main unit, a guiding portion, a conveyance roller pair, a mounting portion, and an urging member. A pair of bearing portions supports a shaft portion of a driven roller. A supporting portion is located on an upstream side or a downstream side in a conveyance direction in the pair of bearing portions and supports a pair of extending portions from below. A pressing portion abuts on the pair of extending portions, from above, between the pair of bearing portions and the supporting portion to elastically deform the pair of extending portions. A regulating portion is located between the pair of bearing portions and the supporting portion in the conveyance direction and regulates an interval between the pair of extending portions such that the interval becomes wider than a length of a roller portion in a width direction.

A sheet separating apparatus includes a stacker having a sheet supporting surface, a separation roller rotating around a first shaft center parallel to a width direction of the sheet supporting surface, contacting a sheet fed from the stacker and conveying the sheet to a downstream side in a conveyance direction perpendicular to the width direction, a separation piece facing the separation roller and separating the sheet one at a time in cooperation with the separation roller, the separation roller and the separation piece nipping the sheet at a first nip position, and a pinch roller provided on an upstream side with respect to the first nip position and abutting on the separation roller to be rotatable around a second shaft center parallel to the width direction, the pinch roller having a portion overlapping the separation piece as seen from the width direction.

A sheet feeder includes a separator to separate an uppermost layer from a bundle of sheets stacked on a sheet stacker, a conveyor to convey a sheet of the uppermost layer one by one along a sheet conveyance path, and a first air blowing port and a second air blowing port disposed along the sheet conveyance path, to blow air upstream in a sheet conveyance direction. The second air blowing port is disposed downstream from the first air blowing port.

A feeding unit includes a retard roller, a first holder, a second holder, an accommodating portion, a pressing portion, a second pressing portion, a release lever, and a second restricting portion. The accommodating portion accommodates the second holder. The second pressing portion presses the second holder in a +Z direction. The release lever restricts the movement of the second holder in the +Z direction. The second holder is provided with a plurality of restricted portions in a Y direction and a +A direction, respectively. The second restricting portion restricts the movement of the second holder in a Z direction. The second restricting portion has a restricting surface. The restricting surface is provided in the accommodating portion and is configured to come into contact with the plurality of restricted portions.

A transport device includes a drive roller and a driven roller. The drive roller transports paper-sheets in a predetermined transport direction by rotation thereof. The driven roller rotates with rotation of the drive roller, and regardless of from which direction the paper-sheets hit a contact point with the first roller, moves in a direction diagonally forward than a vertical direction with respect to the transport direction. The transport device further includes a bearing groove formed so that a shaft of the driven roller moves in a direction diagonally forward than the vertical direction with respect to the transport direction along an inclined surface.