A post-processing apparatus includes a first discharge section configured to discharge a medium having thereon information recorded by a recording section, a processing tray configured to be loaded with the medium discharged by the first discharge section, an edge alignment section disposed on the processing tray, a transport section making contact with an upper surface of the medium mounted on the processing tray and configured to transport the medium to the edge alignment section, a position change section configured to change a relative position of the transport section with respect to the processing tray, and a controller configured to change pressure of when the transport section presses the medium by controlling the position change section, and a post-processing section configured to perform post-processing on the medium on the processing tray, wherein the controller changes the pressure based on processing information regarding processing to be performed on the medium.

A stacking unit includes a processing tray, an alignment section, a transport section, and a moving section. The processing tray has a placement area in which one or more paper sheets are placed. The alignment section aligns leading edges of the paper sheets. The transport section transports the paper sheets to the alignment section. The moving section moves the paper sheets in ±X directions. The alignment section includes: a first alignment surface having a first friction coefficient; and a second alignment surface having a second friction coefficient. The second alignment surface is positioned upstream of the first alignment surface in a +A direction and closer to a center of the placement area in the ±X directions than the first alignment surface is.

A stacking unit includes a processing tray, an alignment section, a transport section, and a moving section. The processing tray has a placement area in which one or more paper sheets are placed. The alignment section aligns leading edges of the paper sheets. The transport section transports the paper sheets to the alignment section. The moving section moves the paper sheets in ±X directions. The alignment section includes: a first alignment surface having a first friction coefficient; and a second alignment surface having a second friction coefficient. The second alignment surface is positioned upstream of the first alignment surface in a +A direction and closer to a center of the placement area in the ±X directions than the first alignment surface is.

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 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 discharging device includes an aligning unit for aligning stacked sheets as a sheet bundle, a discharging unit for discharging the sheet bundle, a discharged tray on which the sheet discharged by the discharging unit is stacked, and a support unit. The support unit supports the sheet bundle from below by extending in a sheet discharging direction of the sheet bundle while the sheet bundle is discharged to the discharged tray and to be accommodated in a direction opposite to the sheet discharging direction at timing when the discharging unit finishes discharging the sheet bundle.

A discharging device includes an aligning unit for aligning stacked sheets as a sheet bundle, a discharging unit for discharging the sheet bundle, a discharged tray on which the sheet discharged by the discharging unit is stacked, and a support unit. The support unit supports the sheet bundle from below by extending in a sheet discharging direction of the sheet bundle while the sheet bundle is discharged to the discharged tray and to be accommodated in a direction opposite to the sheet discharging direction at timing when the discharging unit finishes discharging the sheet bundle.

According to one embodiment, a sheet post-processing device includes a first tray to receive sheets from an image forming unit, a second tray to receive sheets from the first tray, and a third tray to receive sheets from the second tray. The third tray is movable relative to the second tray. A bundle claw is configured to move sheets in a first direction from the second tray to the third tray. A controller is configured to move the third tray relative to the second tray according to the sheets on the second tray. Depending on various characteristics of the sheets on the second tray or the presence of sheets already on the third tray, the position of the third tray may be changed to reduce possible misalignments of sheets in the transfer from the second to third tray.

A medium transporting apparatus includes a first tray on which a medium discharged with a pair of discharge rollers that discharges a medium is mounted, a guide member that contacts the medium, which is discharge with the pair of discharge rollers, from above, and that guides the medium to the first tray, and a width direction matching member that matches an end portion of the medium, which has been discharged on the first tray, in the width direction that intersects a discharge direction of the medium. The guide member and the width direction matching member move in the width direction in an interlocked manner.

A medium transporting apparatus includes a first tray on which a medium discharged with a pair of discharge rollers that discharges a medium is mounted, a guide member that contacts the medium, which is discharge with the pair of discharge rollers, from above, and that guides the medium to the first tray, and a width direction matching member that matches an end portion of the medium, which has been discharged on the first tray, in the width direction that intersects a discharge direction of the medium. The guide member and the width direction matching member move in the width direction in an interlocked manner.