A sheet discharging apparatus includes a first detecting portion provided in an apparatus body and configured to detect a move of a movable member in a state where a movable tray is at an upper limit position in a moving direction of the movable tray, wherein a detection result of the first detecting portion changes depending on a position of the movable tray in the moving direction. In addition, a second detecting portion detects the position of the movable tray in the moving direction, and a control portion, in a case where the second detecting portion detects that the movable tray is at the upper limit position, determines whether a sheet is present on the movable tray based on the detection result of the first detecting portion. When the second detecting portion does not detect that the movable tray is at the upper limit position, the control portion determines that a sheet is present on the movable tray regardless of the detection result of the first detecting portion.

A recording-material processing apparatus includes a supporter, an advancing unit, and a contact member. The supporter supports at least one recording material from below. The advancing unit advances toward the recording material from a lateral side of the recording material supported by the supporter. The contact member is attached to the advancing unit and comes into contact with an edge of the recording material as the advancing unit advances toward the recording material. The contact member is movable in a direction opposite to an advancing direction of the advancing unit.

A recording-material processing apparatus includes a supporter, an advancing unit, and a contact member. The supporter supports at least one recording material from below. The advancing unit advances toward the recording material from a lateral side of the recording material supported by the supporter. The contact member is attached to the advancing unit and comes into contact with an edge of the recording material as the advancing unit advances toward the recording material. The contact member is movable in a direction opposite to an advancing direction of the advancing unit.

A medium discharge device includes a discharge roller pair that is provided with a discharge driving roller and a discharge driven roller which drivably rotates in contact with the discharge driving roller, and a medium receiving tray which receives the medium that is fed and discharged by the discharge roller pair, in which the medium receiving tray includes a guide member which guides such that a tip end of the medium which is discharged from the discharge roller pair enters the medium mounting surface at a predetermined angle, and the guide member is provided to be elastically displaceable in an advancing and retreating direction with respect to the medium mounting surface of the medium receiving tray and is displaced in a direction coming close to the medium mounting surface according to raising of a pressing load due to the medium that is discharged to the medium receiving tray.

A medium discharge device includes a discharge roller pair that is provided with a discharge driving roller and a discharge driven roller which drivably rotates in contact with the discharge driving roller, and a medium receiving tray which receives the medium that is fed and discharged by the discharge roller pair, in which the medium receiving tray includes a guide member which guides such that a tip end of the medium which is discharged from the discharge roller pair enters the medium mounting surface at a predetermined angle, and the guide member is provided to be elastically displaceable in an advancing and retreating direction with respect to the medium mounting surface of the medium receiving tray and is displaced in a direction coming close to the medium mounting surface according to raising of a pressing load due to the medium that is discharged to the medium receiving tray.

A medium discharge device includes a discharge roller pair that is provided with a discharge driving roller and a discharge driven roller which drivably rotates in contact with the discharge driving roller, and a medium receiving tray which receives the medium that is fed and discharged by the discharge roller pair, in which the medium receiving tray includes a guide member which guides such that a tip end of the medium which is discharged from the discharge roller pair enters the medium mounting surface at a predetermined angle, and the guide member is provided to be elastically displaceable in an advancing and retreating direction with respect to the medium mounting surface of the medium receiving tray and is displaced in a direction coming close to the medium mounting surface according to raising of a pressing load due to the medium that is discharged to the medium receiving tray.

A medium discharge device includes a discharge roller pair that is provided with a discharge driving roller and a discharge driven roller which drivably rotates in contact with the discharge driving roller, and a medium receiving tray which receives the medium that is fed and discharged by the discharge roller pair, in which the medium receiving tray includes a guide member which guides such that a tip end of the medium which is discharged from the discharge roller pair enters the medium mounting surface at a predetermined angle, and the guide member is provided to be elastically displaceable in an advancing and retreating direction with respect to the medium mounting surface of the medium receiving tray and is displaced in a direction coming close to the medium mounting surface according to raising of a pressing load due to the medium that is discharged to the medium receiving tray.

A sheet stacker includes a sheet stacking member, a biasing force applier, an angle changer, and a biasing force change reducer. The sheet stacking member has an upstream portion in a sheet conveyance direction. The upstream portion is movable in a vertical direction. The biasing force applier is configured to bias the sheet stacking member upward. The angle changer is configured to change an angle of a sheet stacking face of the sheet stacking member, relative to a surface of a sheet conveyed through a sheet conveying portion. The biasing force change reducer is configured to restrain a change of a biasing force acting on the sheet stacking member, before and after a change of the angle of the sheet stacking member by the angle changer.

A stacker of the disclosure is disposed at an ejection opening of a processing apparatus. A support member of the stacker is movable toward an upstream side and a downstream side in an ejecting direction, receives each of the media ejected through the ejection opening, and supports the medium in such an orientation that the medium is inclined with an end edge of the medium on the downstream side in the ejecting direction positioned above an end edge of the medium on the upstream side in the ejecting direction and that the end edge of the medium on the upstream side in the ejecting direction abuts the stacking surface. A receding mechanism of the stacker causes the support member to recede toward the downstream side. A position maintaining mechanism of the stacker maintains a position of the support member having been moved by the receding mechanism.

A stacker of the disclosure is disposed at an ejection opening of a processing apparatus. A support member of the stacker is movable toward an upstream side and a downstream side in an ejecting direction, receives each of the media ejected through the ejection opening, and supports the medium in such an orientation that the medium is inclined with an end edge of the medium on the downstream side in the ejecting direction positioned above an end edge of the medium on the upstream side in the ejecting direction and that the end edge of the medium on the upstream side in the ejecting direction abuts the stacking surface. A receding mechanism of the stacker causes the support member to recede toward the downstream side. A position maintaining mechanism of the stacker maintains a position of the support member having been moved by the receding mechanism.