An image reading apparatus includes an original tray, an original feeding portion, an original reading portion, an original discharging portion, an original discharge tray, an extension tray, and a rotation guide. A stacking surface of the original discharge tray is provided with an opening through which the rotation guide is capable of passing when the rotation guide rotates from a first position to a second position. In a state in which the extension tray is held at a pulled-out position, the rotation guide is rotatable relative to the extension tray from the first position toward the second position. In a state in which the extension tray is held at an accommodated position, the rotation guide is rotatable from the first position toward the second position by passing through the opening.

A medium ejection device includes a medium ejector, a medium stacker, a medium stopper, and an extended stacker. The medium ejector ejects a medium. The medium ejected from the medium ejector is stacked on a medium stacker. The medium stopper is disposed on the medium stacker and opposite the medium ejector. The extended stacker is disposed on a downstream side of the medium stopper in a medium ejection direction.

A medium ejecting apparatus includes an ejection roller to eject medium, a first tray to place the medium ejected by the ejection roller, a second tray provided so as to be pulled out from the first tray, and a stopper accommodated in the first tray together with the second tray in a laid state, rotatably supported at a downstream end portion in a medium ejecting direction of the second tray, and provided with a slid portion. The first tray is provided with a sliding portion to slide with respect to the slid portion in response to an operation in which the second tray is pulled out from the first tray to raise the stopper.

A sheet discharge device includes: a sheet discharge portion; a sheet stacking portion having a sheet stacking surface for stacking a sheet discharged from the sheet discharge portion; and a stopper in the sheet stacking portion against which, for alignment, the leading end of the sheet discharged from the sheet discharge portion is thrust. The stopper has a support portion, a restricting portion, and an urging mechanism. The restricting portion is supported pivotally on a pivot shaft on the support portion, and is arranged either in a retracted position to lie flat substantially horizontally along the sheet stacking surface or in a restricting position to stand upright substantially vertically to the sheet stacking surface. The urging mechanism urges the restricting portion, when in retracted position, in a direction from restricting position to retracted position and, when in restricting position, in a direction from retracted position to restricting position.

An image forming apparatus includes a first conveyance unit including an image forming unit to convey a sheet on which an image is formed, and a second conveyance unit including a cover movable between a close position and an open position, the second conveyance unit being movable between a first position where the sheet can be conveyed to the sheet conveyance path and a second position separated from the first position. The first conveyance unit includes a retaining portion to retain the cover at a predetermined position, wherein the cover does not interfere with the retaining portion when the second conveyance unit is positioned at the first position, and the cover is in contact with the retaining portion and retained at the open position in a condition where the second conveyance unit is positioned at the second position and the cover is moved from the close position to the open position.

A medium ejection apparatus includes an ejection tray having a first stacking surface, and an extension tray rotatably attached to an end part of the ejection tray at a downstream side in a medium ejection direction, and having a second stacking surface. An end part of the ejection tray at the downstream side is provided with a first abutting part and a second abutting part. An end part of the extension tray at the ejection tray side is provided with a first abutted part and a second abutted part. The second stacking surface is located forming a first angle with respect to the first stacking surface by the first abutted part abutting against the first abutting part. The second stacking surface is located forming a second angle, different from the first angle, with respect to the first stacking surface by the second abutted part abutting against the first abutting part.

An image forming apparatus includes a first conveyance unit including an image forming unit to convey a sheet on which an image is formed, and a second conveyance unit including a cover movable between a close position and an open position, the second conveyance unit being movable between a first position where the sheet can be conveyed to the sheet conveyance path and a second position separated from the first position. The first conveyance unit includes a retaining portion to retain the cover at a predetermined position, wherein the cover does not interfere with the retaining portion when the second conveyance unit is positioned at the first position, and the cover is in contact with the retaining portion and retained at the open position in a condition where the second conveyance unit is positioned at the second position and the cover is moved from the close position to the open position.

A sheet feeding device includes a storage, a discharger, an angle adjuster, and an urging body. The storage stores a sheet bundle. The discharger contacts and discharge an uppermost sheet of the sheet bundle from the storage in a sheet conveying direction in which the uppermost sheet is conveyed. The angle adjuster changes an angle according to a remaining amount of the sheet bundle in the storage. The urging body urges a trailing end of the uppermost sheet in the sheet conveying direction toward the discharger in stages according to the remaining amount.

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 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.