A sheet processing apparatus includes a buffering portion having a reverse conveyance roller pair and an intermediate roller pair, with the reverse conveyance roller pair reversing a conveyance direction of a sheet received from a first conveyance path and delivering the reversed sheet into a second conveyance path and being configured to come into contact with and be separated from each other. The intermediate roller pair is disposed in the second conveyance path and disposed upstream of a conveyance roller pair in a sheet conveyance direction, and the reverse conveyance roller pair is caused to nip a first sheet and a second sheet by causing the reverse conveyance roller pair to abut each other after receiving the second sheet by the reverse conveyance roller pair from the first conveyance path in a state in which the intermediate roller pair nips the first sheet reversed by the reverse conveyance roller pair and the reverse conveyance roller pair is separated from each other.

A loading device includes a placement portion and a correction portion. The placement portion is provided at a device main body, and a single paper sheet discharged from a discharge unit is placed on the placement portion. The correction portion is disposed downstream of the placement portion in a discharge direction, and corrects curling of the single paper sheet by coming into contact with the single paper sheet moving in the discharge direction from the placement portion. Furthermore, the correction portion includes a contact surface that extends in an intersecting direction intersecting the discharge direction and comes into contact with the single paper sheet, such that the position of the correction portion in the vertical direction becomes lower from upstream to downstream in the discharge direction.

A loading device includes a placement portion and a correction portion. The placement portion is provided at a device main body, and a single paper sheet discharged from a discharge unit is placed on the placement portion. The correction portion is disposed downstream of the placement portion in a discharge direction, and corrects curling of the single paper sheet by coming into contact with the single paper sheet moving in the discharge direction from the placement portion. Furthermore, the correction portion includes a contact surface that extends in an intersecting direction intersecting the discharge direction and comes into contact with the single paper sheet, such that the position of the correction portion in the vertical direction becomes lower from upstream to downstream in the discharge direction.

A medium ejecting apparatus includes medium ejecting apparatus includes an ejection roller to eject a medium, a tray to load the medium ejected by the ejection roller, a medium regulating member provided with a load pressing portion on a front-end side thereof to apply a load to the medium ejected on the tray, and provided with an engaging portion on a base portion side opposite to the front-end portion, and a holding member provided with an engaged portion to engage with the engaging portion, to hold the medium regulating member in such a way that the medium regulating member can swing in a vertical direction with respect to an upper surface of the tray, and pivot along a rotation axis in a direction from the base side toward the front-end portion side, according to the ejection of the medium.

A medium ejecting apparatus includes medium ejecting apparatus includes an ejection roller to eject a medium, a tray to load the medium ejected by the ejection roller, a medium regulating member provided with a load pressing portion on a front-end side thereof to apply a load to the medium ejected on the tray, and provided with an engaging portion on a base portion side opposite to the front-end portion, and a holding member provided with an engaged portion to engage with the engaging portion, to hold the medium regulating member in such a way that the medium regulating member can swing in a vertical direction with respect to an upper surface of the tray, and pivot along a rotation axis in a direction from the base side toward the front-end portion side, according to the ejection of the medium.

A loading device includes a placement portion and a friction member. A single paper sheet discharged from a discharge unit is placed on the placement portion. The friction member is disposed downstream of a downstream end portion of the placement portion in a discharge direction, and includes a contact surface that can come into contact with a back surface, of the single paper sheet, facing the placement portion. The contact surface extends at least in the discharge direction, at a position lower than the height position of the downstream end portion in a height direction.

A loading device includes a placement portion and a friction member. A single paper sheet discharged from a discharge unit is placed on the placement portion. The friction member is disposed downstream of a downstream end portion of the placement portion in a discharge direction, and includes a contact surface that can come into contact with a back surface, of the single paper sheet, facing the placement portion. The contact surface extends at least in the discharge direction, at a position lower than the height position of the downstream end portion in a height direction.

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.

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.

A stacking device which is detachably attached to an apparatus body of an image forming apparatus having an abutting member that abuts on a recording material and on which a recording material is stacked includes: a first supporting unit that supports the recording material from a lower side of the recording material; and a second supporting unit that supports an end of the recording material in an attachment/detachment direction of the stacking device. The second supporting unit includes a corresponding region, and a position of the corresponding region agrees with a position of the abutting member abut with the recording material in a width direction which is orthogonal to the attachment/detachment direction. At least a height of the corresponding region in a direction orthogonal to the attachment/detachment direction and the width direction is lower than a height of the abutting member.