A housing is formed with a first opening and a sheet conveyance path. A tray is inserted into the housing through the first opening in a first direction and pulled out in a second direction opposite from the first direction. The tray supports a sheet. The tray includes a bottom plate, a front plate, and a cover. The bottom plate supports a sheet. The front plate protrudes upward from an end portion of the bottom plate in the second direction. The cover is configured to move between a first position at which the cover closes a second opening and a second position at which the cover opens the second opening. The second opening is defined by an end of a top plate in the second direction and an upper end of the front plate, the top plate covering an upper side of a space that accommodates a sheet.

A sheet conveying device includes a sheet-discharging roller, a sheet-discharge tray, a sheet-discharge stopper, and a stopper urging portion including a contact member and an urging member. The sheet-discharge stopper has a first surface and a second surface located on a back side of the first surface and is pivotable between a non-use state in which the second surface faces upward and a use state in which the first surface faces upward. The sheet-discharge stopper is pivotable, in the use state, between a first use position and a second use position at which a distal end is lowered from the first use position. The sheet-discharge stopper is in contact with the contact member in the use state, and an area, of the sheet-discharge stopper is located below the second surface in the non-use state.

A sheet discharge apparatus includes a main tray, a discharge unit, and an expansion tray. The main tray is pivotable between a closed position and open position relative to a sheet discharge apparatus main body. The discharge unit discharges the sheet onto the main tray in the closed position. The expansion tray expands a main tray stacking area and is movable between a storage position where the expansion tray is stored in the main tray and an expansion position where the expansion tray is slid from the storage position in a sheet discharge direction and expands the stacking area. At the expansion position, the expansion tray is pivotable independently of the main tray. A direction in which the expansion tray is pivoted upward is the same as a direction in which the main tray is pivoted from the closed to the opened position.

An image forming apparatus includes a first supporting member supporting a long sheet, a feeding unit for feeding the long sheet supported by the first supporting member with respect to a feeding direction and a second supporting member, rotatable about a rotational shaft, for supporting the long sheet with the first supporting member. In a state in which the sheet is bent so that a first portion of the long sheet is supported by the first supporting member and a second portion which is a more rear side than the first portion is positioned above the first portion, the second supporting member is movable between a first position where the second supporting member supports the second portion of the sheet and a second position where the center of gravity of the second supporting member is positioned downstream of a rotational center with respect to the feeding direction and the second supporting member maintains an attitude thereof by its own weight.

A sheet stop mechanism includes a sheet stopper and a support mechanism. The sheet stopper is formed on a sheet stacking surface. The support mechanism supports the sheet stopper to be rotatable between a stored state and a standing state, wherein in the stored state, the sheet stopper is stored in the sheet stacking surface, and in the standing state, the sheet stopper stands from the sheet stacking surface diagonally upward toward a downstream in the sheet discharge direction. When the sheet stopper is in the standing state, the support mechanism supports the sheet stopper in such a manner that an angle formed between the sheet stopper and the sheet stacking surface becomes small as sheets stacked on the sheet stacking surface increase in number.

In a printing apparatus, a first tray is capable of stacking a sheet discharged from a discharge port. A second tray is accommodated in a lower side of the first tray and is capable of stacking the sheet discharged from the discharge port by being drawn out in a sheet discharging direction from the discharge port. A changing unit changes inclination angles of the first tray and the second tray with respect to the sheet discharging direction according to a drawn-out position of the second tray.

An image forming apparatus includes an apparatus body, a sheet stacking portion on which a sheet discharged from the apparatus body is to be stacked, an extension member, and an upper device. The extension member is rotatable about a rotating fulcrum between a first position at which the extension member is stored in the sheet stacking portion and a second position at which the extension member extends to downstream of the sheet stacking portion in a sheet discharge direction in which the sheet is discharged from the apparatus body. The upper device is disposed above the rotating fulcrum of the extension member and is supported to be openable by the apparatus body. The upper device in a closed state regulates a rotation of the extension member from the first position toward the second position.

A sheet discharge apparatus includes a main tray, a discharge unit, and an expansion tray. The main tray is pivotable between a closed position and open position relative to a sheet discharge apparatus main body. The discharge unit discharges the sheet onto the main tray in the closed position. The expansion tray expands a main tray stacking area and is movable between a storage position where the expansion tray is stored in the main tray and an expansion position where the expansion tray is slid from the storage position in a sheet discharge direction and expands the stacking area. At the expansion position, the expansion tray is pivotable independently of the main tray. A direction in which the expansion tray is pivoted upward is the same as a direction in which the main tray is pivoted from the closed to the opened position.

A sheet discharge apparatus includes a main tray, a discharge unit, and an expansion tray. The main tray is pivotable between a closed position and open position relative to a sheet discharge apparatus main body. The discharge unit discharges the sheet onto the main tray in the closed position. The expansion tray expands a main tray stacking area and is movable between a storage position where the expansion tray is stored in the main tray and an expansion position where the expansion tray is slid from the storage position in a sheet discharge direction and expands the stacking area. At the expansion position, the expansion tray is pivotable independently of the main tray. A direction in which the expansion tray is pivoted upward is the same as a direction in which the main tray is pivoted from the closed to the opened position.

A medium transport device includes a first transport route for discharging a medium processed by a processing unit, a second transport route for discharging the medium processed by the processing unit, and a medium receiving tray that is capable of switching a state between a medium receiving state of receiving the medium that is discharged through the first transport route and a medium unreceivable state achieved by performing state switching from the medium receiving state. The first transport route comes into a non-formed state and at least a part of the medium receiving tray forms the second transport route when the medium receiving tray is in the medium unreceivable state, and the second transport route comes into the non-formed state and the first transport route is formed when the medium receiving tray comes into the medium receiving state.