There is provided a stacking apparatus capable of stably conveying and stacking sheets without occurrence of damage or buckling of the sheets in the structure of discharging the curled sheets one by one. In regard to each of a plurality of clamp guides which project toward stacking trays from conveyance means to guide sheets S, the projecting position varies in accordance with a size and an amount of stacked sheets Sa on the stack trays. The stacking tray comprises an inclined surface and a curved surface. An upper guide is located to face the inclined surface by a predetermined interval, and the upper guide is located not to face the curved surface or is located to face it by an interval larger than a predetermined interval.

Provided is a sheet processing apparatus, including: a placement portion to which a sheet conveyed by a conveyance portion in a conveyance direction is placed; a processing portion configured to perform predetermined processing on a sheet placed on the placement portion, and to be movable in a predetermined moving range; and a control portion configured to control the processing portion to position, at a timing at which a sheet conveyed by the conveyance portion passes through the moving range, from a first position of preventing from interfering with the sheet to a second position of performing the predetermined processing on a preceding sheet having been conveyed by the conveyance portion and placed on the placement portion before the sheet.

A post-processing apparatus for post-processing paper discharged from an image forming apparatus comprises: a paper discharging roller for conveying both first and second paper sequentially discharged from an image forming apparatus to an intermediate loading part; a main paddle part for conveying the first and second paper loaded on the intermediate loading part to a compiling region; a reverse roller for conveying, together with the main paddle part, the first and second paper to the compiling region; and a binding part for processing the first and second paper conveyed to the compiling region, the paper discharging roller allows the first paper to stand by on a standby path, and conveys the first and second paper to the intermediate loading part in a state in which the leading end of the first paper protrudes further than the leading end of the second paper.

A stacker includes a medium stacking portion for receiving and stacking a medium processed and discharged by a processing unit, a medium butting portion for aligning the medium by contacting a leading end of the medium, and a paddle that includes a feeding portion and is for transporting the medium received by the medium stacking portion in a direction toward the medium butting portion by rotating. Furthermore, the stacker has a first mode in which the paddle stops in a state in which the feeding portion does not contact the medium on the medium stacking portion and a second mode in which the paddle stops in a state in which the feeding portion comes into contact with the medium on the medium stacking portion and is deformed.

A sheet stacking apparatus includes a discharge unit, a stacking portion on which discharged sheets are stacked, a lifting unit, and first and second abutting portions. The lifting unit lifts and lowers the stacking portion. The first abutting portion abuts a trailing end of the stacked sheets in a sheet discharge direction. The first abutting portion does not move in an up-down direction. The second abutting portion abuts the stacked sheets trailing end. The first abutting portion supports the second abutting portion such that the second abutting portion is movable in the up-down direction. If the stacking portion is lowered from a first to a second position below the first position, the second abutting portion does not move in accordance with the stacking portion. If the stacking portion is further lowered beyond the second position, the second abutting portion moves in accordance with the stacking portion.

A medium discharging device includes a side cursor, a moving unit, a discharge unit, and a side guide. The side cursor is provided in a processing tray and is provided movable in an intersecting direction intersecting a discharging direction of the medium, aligns an end portion of a media bundle in the intersecting direction, and guides the media bundle in the discharging direction when the media bundle is discharged. The moving unit moves the side cursor in the intersecting direction. The discharge unit discharges the media bundle from the processing tray to the discharge tray where the media bundle is placed. When the media bundle is discharged, the side guide is disposed alongside the side cursor in the discharging direction and restricts movement of the media bundle in the intersecting direction, which is discharged by the discharger.

A post-processing device includes a processing tray on which a medium recorded by a recording portion is loaded, and a first paddle which is an example of a transportation member provided above the processing tray and rotating to transport the medium toward the upstream in a transport direction. In addition, the post-processing device includes a roller which is an example of a rotating body provided above the rotation shaft of the first paddle, and a paddle unit frame which is an example of an upper member provided above the roller. The roller and the paddle unit frame are positioned within a rotation locus of the first paddle.

A sheet discharge apparatus includes a discharge unit configured to discharge a sheet in a discharge direction, a stacking surface configured to stack the sheet discharged by the discharge unit, and a wall including a plurality of hole portions and an abutting part, wherein the plurality of hole portions includes a first hole portion disposed across an extension line along the stacking surface when viewed in a width direction, the first hole portion including a first edge portion and a second edge portion, the first edge portion being positioned on a side of the stacking surface, and wherein, in the vertical direction, an upper end of the first edge portion of the first hole portion is positioned above the extension line, and a lower end of the first edge portion of the first hole portion is positioned below the extension line.

A sheet processing apparatus arranged in a space between an image reading section for reading an image and an image formation section for forming an image on a sheet includes a carry-in path guiding a sheet from a carry-in entrance; a relay roller provided in the carry-in path to relay and transport the sheet; a first transport path positioned on a downstream side of the relay roller and having a carry-in roller to transport the sheet from the carry-in path to the first collection tray; and a second transport path branched from the carry-in path and having a branch roller to transport the transported sheet to the second collection tray. The relay roller shifts the sheet in a direction crossing the transport direction while a front end of the sheet enters the first transport path or the second transport path, and arrives at the carry-in roller or the branch roller.

An image forming apparatus includes a main body of the image forming apparatus with an opening portion, an image forming unit, an accommodation portion, a stack portion, a sheet moving unit, and a control unit that controls switching between a first mode that moves, with the sheet moving unit, a sheet accommodated in the accommodation portion and stops the sheet when a part of the sheet is exposed external to the main body of the image forming apparatus from the opening portion, and a second mode that moves the sheet, with the sheet moving unit, accommodated in the accommodation portion and that discharges the sheet to the stack portion.