Provided is a sheet processing apparatus, including: a regulation portion configured to contact with an end edge of a sheet to be conveyed and to regulate a position of the sheet; a position adjustment portion configured to perform position adjustment on a sheet in a direction along an end edge of the sheet of which the end edge is in contact with the regulation portion; a folding portion configured to perform folding processing on a sheet which has been regulated by the regulation portion; and a control portion configured to execute: a first mode of causing the folding portion to perform the folding processing on a sheet which has been regulated by the regulation portion, without causing the position adjustment portion to perform the position adjustment on the sheet; and a second mode of causing the position adjustment portion to perform the position adjustment with respect to the regulated sheet.

An image forming apparatus includes: a transport member that transports a medium; a storage that is disposed below the transport member in a gravitational direction, and that stores the medium which is delivered by the transport member and falls into the storage; a supporter that is provided in the storage, and that has an upper end disposed below the transport member in a gravitational direction, and that allows the medium to be stored with a front end of the medium in a discharge direction matching a lower end of the medium in a gravitational direction; and a guidance member that is disposed in the supporter with the medium interposed between the guidance member and the supporter, and that guides the medium which falls to the supporter.

A medium transfer device includes a swinging member, a hopper in which a setting plate on which a plurality of mediums are placed such that the mediums are moved toward the swinging member by gravitation, and a driving unit configured to swing the swinging member such that the mediums are shaken by the swinging member.

A medium processing device includes a medium storage portion configured to stack sheet-shaped media to store the sheet-shaped media, a first pressurizing member configured to pressurize the sheet-shaped media stored in the medium storage portion, and a second pressurizing member configured to pressurize the sheet-shaped media in cooperation with the first pressurizing member when a stacking thickness of the sheet-shaped media stored in the medium storage portion is equal to or greater than a predetermined thickness.

A sheet conveying device includes: a housing; a sheet supply tray; and a dust proof cover including a first cover and a second cover. The sheet supply tray is supported to the housing and pivotally movable between a closed position and an open position. The first cover is supported to the housing and pivotally movable between a first position in proximity to the sheet supply tray and a second position away from the sheet supply tray. The second cover is connected to the first cover and pivotally movable about a second pivot axis between a third position in proximity to the sheet supply tray and a fourth position away from the sheet supply tray. The second cover has a center of gravity positioned closer to the housing than the second pivot axis is to the housing in a state where the sheet supply tray is in the closed position.

A paper sheet stacking device includes: a conveyance mechanism that conveys paper sheets; a stacking mechanism including a stacking space in which the paper sheets, which are conveyed by the conveyance mechanism, are stacked, a first space regulating member that moves in a thickness direction of the paper sheets in the stacking space, a support member that extends in the moving direction of the first space regulating member and supports one side of the paper sheets in the stacking space, and a second space regulating member that is provided to face the support member and moves in a direction toward and away from the support member; and a controller that controls the stacking mechanism. The controller controls a position of the second space regulating member in accordance with an outer dimension of the paper sheets that are conveyed into the stacking space by the conveyance mechanism.

An image forming apparatus includes: a transport member that transports a medium; a storage that is disposed below the transport member in a gravitational direction, and that stores the medium which is delivered by the transport member and falls into the storage; a supporter that is provided in the storage, and that has an upper end disposed below the transport member in a gravitational direction, and that allows the medium to be stored with a front end of the medium in a discharge direction matching a lower end of the medium in a gravitational direction; and a guidance member that is disposed in the supporter with the medium interposed between the guidance member and the supporter, and that guides the medium which falls to the supporter.

A banknote storage device includes a housing member having a loading region in which a banknote is loaded; a storage which is disposed to be adjacent to the housing member and in which the banknote is stored; a temporary accumulation region provided between the loading region and the storage so as to temporarily accumulate the banknote to be stored in the storage; and a push-in mechanism that pushes the banknote loaded to the loading region, into the temporary accumulation region and that pushes a plurality of the banknotes accumulated in the temporary accumulation region, into the storage.

A pair of edge guides provided on a medium mounting section of a medium feeding apparatus each include a volume limiter spaced from the mounting surface of the medium mounting section and extending from the guide surface of at least one of the pair of edge guides in a direction intersecting the guide surface, the volume limiter including a limiting surface that limits a number of sheets mounted on the medium mounting section. The limiting surface includes a groove extending in the feed direction, at a position between a corner portion formed at an intersection of an end portion of the limiting surface in the width direction and the guide surface, and the other end portion of the limiting surface, and configured to insert at least a part of a side edge of the medium, to thereby restrict the side edge from moving in the width direction.

A self-closing device is configured to retract a unit capable of being pulled out with respect to an apparatus main body, to the apparatus main body. The self-closing device includes a plurality of retracting modules configured to retract the unit from a retracting start position towards a retracting end position. The plurality of retracting modules are provided such that retracting strokes from the retracting start position to the retracting end position partially overlap each other and the retracting start positions are different from each other in the retracting direction.