A post-processing apparatus includes a post-processing device, an ejection device, and an ejection tray. The post-processing device executes post-processing on a medium on which an image is formed by an image forming apparatus. The ejection device ejects the medium on which the post-processing is executed by the post-processing device. The ejection tray holds the medium ejected by the ejection device. The ejection tray includes a main tray having an upper face inclined downward in an ejection direction, and a movable tray being rotatably supported by the main tray between a stacking position at which the medium ejected by the ejection device remains stacked on the upper face of the main tray and an ejection position at which the medium ejected by the ejection device slides along the upper face of the main tray.

A sheet discharge device includes: at least one processor; a conveyance unit configured to convey a sheet along a conveyance path; a discharge unit to which the sheet is discharged; a storage unit that is provided in a middle of the conveyance path and temporarily stores the sheet; an alignment unit provided in the discharge unit and configured to align the sheet in a width direction intersecting a convey direction of the sheet, in which the processor is configured to change a method of aligning the sheets by the alignment unit between a case where storage control for storing the sheets in the storage unit is performed and a case where the storage control is not performed.

A movable-member supporter includes: a first support member that includes a first support plate, a first guide unit provided at the first support plate, and a first connection section, the first guide unit guiding movement of a movable member and having one end that extends to one side surface of the first support plate, the first connection section being provided at the one side surface of the first support plate; and a second support member that includes a second support plate, a second guide unit provided at the second support plate, and a second connection section, the second guide unit guiding movement of the movable member and having one end that extends to one side surface of the second support plate, the second connection section being provided at the one side surface of the second support plate and being connected with the first connection section of the first support member.

A sheet post-processing apparatus includes an apparatus body, a body frame, a sheet conveyance passage, an elevating tray, and an elevating unit. The elevating unit has a pair of rails. The body frame has a plurality of vertical frame members extending in the vertical direction and horizontal frame members that extends in a horizontal direction and is joined to the plurality of vertical frame members. The pair of rails are formed integrally with, among the plurality of vertical frame members, a pair of vertical frame members provided corresponding to a second side surface.

A postprocessing apparatus includes: a first postprocessing member that performs postprocessing on a recording medium; a second postprocessing member that differs from the first postprocessing member and performs postprocessing on the recording medium; a mounting base to which the first and second postprocessing members are mounted; a support plate having a guide member that guides movement of the mounting base; and a moving mechanism that moves the mounting base along the guide member.

A post-processing device includes: a passage that extends in one direction; a post-processing section that is movable on a plane along the passage and that is stopped at plural post-processing positions, including a stop position determined in advance, to perform post-processing on a recording medium; and a positioning portion which is provided at the stop position and against which an end portion of the recording medium abuts when the post-processing section performs the post-processing at a post-processing position other than the stop position, the positioning portion being retracted with respect to the post-processing section when the post-processing section passes through the stop position or is moved toward the stop position.

A folding apparatus includes: a folding unit configured to fold a recording medium at an intermediate portion in a transport direction of the recording medium; an upstream roller pair disposed on an upstream side in the transport direction of the recording medium with respect to the folding unit, and configured to transport the folded recording medium toward the folding unit with a fold as a leading end; and a downstream roller pair disposed on a downstream side in the transport direction of the recording medium with respect to the folding unit, and configured to sandwich and transport the recording medium sandwiched between the upstream roller pair, the downstream roller pair being configured to apply a transport force to a portion of the recording medium that is connected to a portion of the recording medium that is sandwiched between the upstream roller pair.

A sheet separation device separates a non-bonding portion of a two-ply sheet in which two sheets are overlapped and bonded together at one end of the two-ply sheet. The sheet separation device includes a separator that includes a first separator and a second separator. The first separator is inserted into a gap between the two sheets of the two-ply sheet. The second separator is inserted between the two sheets at said another end of the two-ply sheet that is opposite to the one end of the two-ply sheet and moves in a width direction of the two-ply sheet after the first separator is inserted into the gap and relatively moves from the one end to said another end.

A loading unit includes a processing tray, alignment units, and a paddle. In the processing tray, a medium is placed. The alignment units are disposed an interval in a Y direction to align a downstream tip end in a positive A direction of the medium. The paddle moves the medium that has been fed onto the processing tray toward the alignment units. A coefficient of friction of a contact surface of the alignment unit is higher than a coefficient of friction of a front face of the alignment unit, and the contact surface is positioned downstream of the front face in the positive A direction.

A sheet processing apparatus includes a plurality of folding devices, a control unit that controls a job involving a folding process, and an input unit that accepts settings for the job from a user. The input unit accepts, from the user, specification of a priority preference out of a plurality of predetermined preferences related to the folding process. The control unit selects, out of the plurality of folding devices, a folding device that can perform the folding process with the settings for the job made by the user as a target folding device. If a plurality of target folding devices are present, then based on the priority preference, the control unit determines, out of the plurality of target folding devices, a folding device with which to perform the folding process.