A sheet binding processing apparatus includes a conveying portion, a conveying path for sheets, a stacking portion on which sheets from the conveying path are stacked, a first regulating portion for regulating a sheet bundle on the stacking portion in a crossing direction, a second regulating portion for regulating a sheet bundle in the conveying direction, a manual setting portion for setting sheets from an outside of the apparatus, and a binding device which binds a sheet bundle by a staple and moves in the crossing direction. An angular posture of the binding device located at a third position is different from an angular posture located at a first position. An angular posture of the binding device located at the third position is different from an angular posture located at a second position. The second position is located at a second side of the first position.

A printing apparatus can prevent a print medium from buckling during discharging. In a case in which the print conveyance speed determined by the print mode is higher than or equal to a specified speed, the print medium after printing is conveyed to a discharging tray at the print conveyance speed, and in a case in which the print conveyance speed determined by the print mode is lower than the specified speed, the print medium after printing is conveyed to the discharging tray at the specified speed increased from the print conveyance speed.

A sheet stacking device includes a discharge port, an alignment wall, a discharge tray, an alignment belt, and a guide part. The alignment wall extends in an upper-and-lower direction below the discharge port. The discharge tray is provided so as to be capable of moving up and down along the alignment wall. The alignment belt with endless is stretched along the alignment wall in the upper-and-lower direction. The alignment belt has an inner circumferential surface facing the alignment wall and an outer circumferential surface with which an upstream edge of the sheet stacked on the discharge tray comes into contact, and circulates at a same speed as the discharge tray in synchronization with the discharge tray. The guide part is configured to be provided between the alignment wall and the alignment belt. With the guide part, the inner circumferential surface of the alignment belt slides in contact.

A sheet discharge device includes a discharge conveyance path, a pair of discharge rollers, a side wall, a sheet stacking tray, a first fan, and a second fan. The discharge conveyance path communicates with a discharge port through which a sheet having passed through a fixing portion is discharged. The pair of discharge rollers convey the sheet along the discharge conveyance path and discharge the sheet from the discharge port. The side wall extends downward from the discharge port. The sheet stacking tray extends from the side wall in a sheet discharge direction in which the sheet is discharged by the pair of discharge rollers. The first fan is disposed below the discharge conveyance path and blows air toward the discharge conveyance path. The second fan is disposed above the discharge port and blows air from above the discharge port toward the sheet stacking tray.

A post-processing apparatus includes a post-processing unit configured to receive sheets from an image forming apparatus, perform processing on the received sheets, and then discharge the processed sheets through a discharge port. A sensor is configured to detect a presence of an object at the discharge port. The sensor includes a first light emitter on a first side of the discharge port that is positioned to emit a light across a width of the discharge port, a reflector on a second side of the discharge port opposite the first side in a first direction, and a first light receiver positioned to receive light of the first light emitter from the reflector. A controller is configured to terminate the processing on the received sheets by the post-processing unit when the sensor detects the presence of the object at the discharge port.

Provided are a post-processing apparatus, an image forming apparatus, and a post-processing method capable of avoiding the occurrence of a malfunction due to a failure to discharge a sheet bundle after a binding process. A plurality of sheets is loaded on a stack tray. A staple unit binds the plurality of sheets. A discharge roller discharges the sheet bundle bound by the staple unit from the stack tray. Each time a sheet is conveyed to the stack tray, an aligning unit moves between a first position in contact with the sheet loaded on the stack tray and a second position separating from the sheet. A detection processing unit detects a failure of discharging the sheet bundle by the discharging roller. A stop processing unit can stop the operation of the aligning unit when the discharge failure is detected by the detection processing unit.

A discharge tray has a frame, a first tray, a second tray, and an angle switching member. The first tray has a sheet-discharge-direction downstream side inclined upward. The second tray is movable, along a pair of wall portions on the frame, to a first position where at least part of the second tray overlaps the first tray, a second position to which the second tray extends toward the sheet-discharge-direction downstream side, and a third position to the sheet-discharge-direction downstream side of the second position where the second tray is rotatable. As the second tray moves, the angle switching member moves. At the third position, the angle switching member rotates through a predetermined angle and is held by the wall portions. The angle switching member supports the second tray at a second inclination angle smaller than a first inclination angle when the second tray is at the second position.

A recording apparatus includes a recording head; an output unit that outputs the recording medium; an output tray that receives the recording medium; a pressing member that is configured to be displaced in an up-down direction and that presses the recording medium toward the output tray by displacement of the pressing member from an upper side to a lower side with respect to the recording medium; and a restricting member configured to contact an upstream end portion in an output direction of the recording medium pressed by the pressing member, the restricting member including a contact position thereof with respect to the upstream end portion being configured to rotate. The restricting member restricts deformation of the upstream end portion pressed by the pressing member at the contact position. The pressing member is displaced upward in a state in which the restricting member restricts the deformation of the upstream end portion.

A sheet discharging device includes: a medium supporting portion configured to support a transported medium, the medium supporting portion being configured to swing; a stacking portion which is provided vertically below the medium supporting portion and on which the medium dropped from the medium supporting portion is stacked, the stacking portion being configured to move up and down; and a detecting portion that detects swinging of the medium supporting portion, in which the detecting portion detects the swinging of the medium supporting portion when the medium on the rising stacking portion comes into contact with a lower surface of the medium supporting portion.

A sheet post-processor includes a processing tray, a sheet discharge port, a discharge roller pair, a pair of cursor members, a pair of support members, and an interlocking mechanism. The interlocking mechanism includes a pair of coupling members arranged in the processing tray so as to be reciprocatable in a sheet width direction. The pair of coupling members are coupled to or decoupled from the pair of cursor members in accordance with movement of the pair of cursor members. While being coupled to the pair of cursor members, the pair of coupling members contact the pair of support members so as to displace the pair of support members to a protruding position, and while being decoupled from the pair of cursor members, the pair of coupling members separate from the pair of support members so as to displace the pair of support members to a retracted position.