A document conveying apparatus is provided with a document tray and a discharge tray disposed below the document tray. The document tray includes an upper tray member, a lower tray member, a movable tray member, and a driving portion configured to move the upper tray member and the movable tray member integrally to a raised position and a lowered position. The movable tray member is configured to be moved in a width direction between a first position and a second position in which the movable tray member is retracted into below the upper tray member. The document tray includes a shutter configured to cover a gap created between the upper tray member and the lower tray member. The gap is created by the upper tray member and the movable tray member being moved to the raised position and the movable tray member being moved to the second position.

A medium discharging device includes a discharging unit which discharges a medium; and a medium receiving tray which receives the medium discharged by the discharging unit, and is switched between an extended state and an accommodated state, in which the medium receiving tray is provided with a base tray, a main extending unit that is accommodated or extended, and at least one sub-extending unit that is accommodated or extended, and in which the base tray forms an accommodating space for accommodating at least the one sub-extending unit, and is provided with a first protrusion portion protruding toward the accommodating space.

A sheet feeding apparatus includes a sheet containing unit and a sheet feeding device to feed sheets in the sheet containing unit. The sheet containing unit includes a main body to hold sheets, a drawer member capable of being drawn from the main body, a restricting member movable in a direction parallel to a sheet feeding direction, a first retaining member disposed at the main body, and a second retaining member disposed at the drawer member. The drawer member holds the sheets together with the main body when drawn from the main body. The restricting member restricts an upstream end position of the contained sheets. The first retaining member retains the restricting member at a first position. The second retaining member retains the restricting member at a second position.

A sheet stacking apparatus includes a sheet stacking unit configured to stack a sheet thereon and a sheet regulating unit configured to regulate a position of a sheet stacked on the sheet stacking unit. The sheet regulating unit includes a main body movable with respect to the sheet stacking unit and an operating portion having a pressable pressure surface, moved from a first position to a second position by pressing the pressure surface, and pivotably supported on the main body about a pivoting fulcrum positioned above a middle position of the pressure surface, the main body being regulated from moving with respect to the sheet stacking unit when the operating portion is in the first position, and the main body being allowed to move with respect to the sheet stacking unit when the operating portion is in the second position.

A sheet feeding apparatus includes a sheet containing unit and a sheet feeding device to feed sheets in the sheet containing unit. The sheet containing unit includes a main body to hold sheets, a drawer member capable of being drawn from the main body, a restricting member movable in a direction parallel to a sheet feeding direction, a first retaining member disposed at the main body, and a second retaining member disposed at the drawer member. The drawer member holds the sheets together with the main body when drawn from the main body. The restricting member restricts an upstream end position of the contained sheets. The first retaining member retains the restricting member at a first position. The second retaining member retains the restricting member at a second position.

The image forming apparatus may include a main body and a cassette to enter or exit the main body along a first direction to be mounted in or released from the main body, respectively. The cassette may include a supporter extendable in a second direction perpendicular to the first direction to protrude from an exterior of the main body. The main body may include a lever which is movable in the first direction between a supporting position at which the lever supports the main body and a release position at which to allow the cassette to enter or exit the main body along the first direction.

The stacker comprises two stacking platforms and a system for conveying corrugated board sheets, configured to discharge the sheets alternatively onto one or the other of the two stacking platforms. A switching device allows for a quick switch of the conveyor system from one to the other of two operating conditions.

To enable placement of a regulating member which regulates a position of an end of a paper sheet at a desired position, and stable sheet feeding. A fixing member for standard size is guided to engage with a fixing hole for standard size and, in a state where the fixing member for standard size positions a trailing end regulator, a fixing member for non-standard size does not engage with a rack gear.

A sheet container to contain a sheet includes a support unit including a plurality of engaged portions and supports the contained sheet, a moveable regulation unit that contacts a sheet end to regulate the sheet in position. The regulation unit includes an operating member held by a holding member and a fixing member movable with the operating member covered by a cover. The fixing member is movable between an engaging position at which the fixing member engages with one of the plurality of engaged portions and a non-engaged position at which the fixing member does not engage with one of the plurality of engaged portions. The operating member is engageable with the cover. The regulation unit is kept fixed to the support unit by the fixing member engaging with one of the plurality of engaged portions, with the cover engaging with the operating member.

A sheet loading device includes a device body to load a sheet, a guide disposed extending in a sheet conveying direction in the device body, a restricting body to move along the guide of the device body and to restrict a position of an end portion of the sheet, and a securing body to attach to the restricting body and the guide and detach from the restricting body and the guide, and having an engaging body. The engaging body of the securing body engages with the guide at an arbitrary position on the guide in the sheet conveying direction. The restricting body is being secured to the device body according to engagement of the engaging body of the securing body with the guide of the device body.