A sheet regulating portion includes a body portion including a regulating surface facing an edge of a sheet, a pressing member having a pressing portion capable of projecting out of the body portion, an upper portion formed integrally with an upper part of the pressing portion so as to project to a sheet side and regulating an upward move of the sheet, and an urging member to urge the pressing member so that the pressing portion presses the edge of the sheet. In addition, a holding portion holds the pressing portion movably from a projecting position where the pressing portion projects out of the body portion to a retracting position where the upper portion enters within the body portion while inclining the pressing portion with respect to the regulating surface by resisting against the urging member when the upper portion is pressed from above.

A medium conveyance device includes a body, a table in which a placement surface is formed and that is supported by the body movably to be arranged in a first area or a second area, a guide that is supported by the table movably to be arranged in a third area or a fourth area and that regulates move of an original that is placed on the table such that a height of the guide is lower when the guide is arranged in the fourth area than when the guide is arranged in the third area, and a mechanism that moves the guide along with move of the table such that the guide is arranged in the third area when the table is arranged in the first area and the guide is arranged in the fourth area when the table is arranged in the second area.

A sheet feeding cassette (21) includes a body part (31), a placement plate (33) disposed on a bottom plate (31a) of the body part (31), a shaft (61) extending along a width direction, a lift plate (35) configured to be turned around the shaft (61) to lift and lower a downstream end portion of the placement plate (33), and a pair of side cursors (37F, 37R). Both end portions of the shaft (61) are rotatably supported by the body part (41), outside in the width direction of the side cursors (37F, 37R) disposed at the most separate position. The side cursors (37F, 37R) each has an abutment wall (71F, 71R) abutting on a side surface of the sheet and a recess (79) externally fitted to the shaft (61) from above, and the recess (79) slides on the shaft (61) when the side cursors (37F, 37R) move in the width direction.

To effectively correct a sheet that is transported while being skewed, a post-processing apparatus B provided with a processing tray 25 that temporarily stores a sheet to perform post-processing and a stack tray 30 that loads sheets subjected to the post-processing performs preliminary alignment with one of an alignment mechanism 35 on the processing tray 25 side and an alignment mechanism 38 on the stack tray 30 side corresponding to size information of a sheet in transporting the sheet from the stack tray 30 side toward the processing tray 25 for post-processing in a post-processing device 31, and takes in the sheet toward a regulation stopper 29 with a take-in roller 33. Then, after aligning the sheet with the alignment mechanism 35, the apparatus performs the post-processing on the sheet with the sheet post-processing device 31 to transport to the stack tray 30.

A sheet discharging apparatus includes a discharging portion, a first supporting portion configured to support the sheet in a state where at least a part of the sheet is exposed to an outside, a second supporting portion configured to support the sheet discharged by the discharging portion, and a control portion configured to execute a first mode and a second mode, the first mode being a mode where the first supporting portion is selected as a destination of the discharged sheet and where the first supporting portion supports the sheet, the second mode being a mode where the second supporting portion is selected as the destination of the discharged sheet and where the second supporting portion supports the sheet by discharging the sheet supported on the first supporting portion to the second supporting portion in a state where the sheet is not supported on the first supporting portion.

A sheet feeding device, which is included in an image forming apparatus and includes a device attachment body, includes a sheet container configured to accommodate a sheet, a support configured to support a lower face of the sheet in the sheet container, a sheet width regulator configured to regulate a position of the sheet in a sheet width direction, a conveying force applier configured to apply a sheet conveying force in a sheet conveying direction to the sheet in the sheet container, and a sheet guide disposed above the sheet in the sheet container and configured to regulate movement of the sheet in an upper direction.

A retracting device includes a housing that is disposed in or on an accommodating unit to be pulled out from an apparatus including a protrusion and that has a groove extending from a first position to a second position and having an opening formed at the first position, the first position corresponding to a position of the protrusion when the accommodating unit moving in a direction in which the accommodating unit is accommodated into the apparatus reaches a predetermined position and the second position corresponding to a position of the protrusion when the accommodating unit is accommodated in the apparatus, and a movable unit that is disposed in the housing and that moves, when the accommodating unit reaches the predetermined position and the protrusion enters the opening, while holding the protrusion to cause the protrusion to move along the groove and with respect to the housing toward the second position.

A media-sheet stacking system for stacking media sheets on a device output tray comprises a kicker to advance a media sheet along the output tray by pushing a trailing edge of the media sheet as it exits the device, and a movable element arranged to face the output tray across a space that receives media sheets exiting the device. A drive mechanism is provided to drive the movable element in the direction of advance of the media sheet along the output tray.

A sheet feeding device, which is included in an image forming apparatus and includes a device attachment body, includes a sheet container configured to accommodate a sheet, a support configured to support a lower face of the sheet in the sheet container, a sheet width regulator configured to regulate a position of the sheet in a sheet width direction, a conveying force applier configured to apply a sheet conveying force in a sheet conveying direction to the sheet in the sheet container, and a sheet guide disposed above the sheet in the sheet container and configured to regulate movement of the sheet in an upper direction.

A sheet storage apparatus includes a sheet storage portion and a regulating member configured to regulate positions of a sheet that is stored in the sheet storage portion. The regulating member includes a regulating portion configured to abut against the sheet. The regulating member is moved to a first regulating position on which the regulating portion regulates an end portion in a first direction of a first sheet having a first size. In addition, the regulating member is moved to a second regulating position on which the regulating portion regulates an end portion, in a second direction orthogonal to the first direction, of a second sheet having a second size different from the first size.