A medium handover device is provided including: a fixed peripheral side section that covers portions of side faces enclosing a periphery of a collection space in which a paper sheet shaped medium is collected, other than at least a portion of an opposing side face opposing a medium support section supporting the medium inside the collection space, which portion is open, and other than at least a portion of an adjacent side face adjacent to the opposing side face, which portion is open; a lid section that has a shape covering portions of the side faces enclosing the periphery of the collection space that are not covered by the fixed peripheral side section; a transition section that transitions the lid section to enable the lid section to adopt a closed state with respect to the fixed peripheral side section in which the lid section is close to or abutting the fixed peripheral side section and the collection space is closed, and to adopt an open state with respect to the fixed peripheral side section in which at least a portion of the lid section is separated from the fixed peripheral side section and the collection space is opened; and a transfer section that transfers the medium between an interior and an exterior of the collection space.

A sheet feeding device includes: a frame; a feeding roller rotatable about an axis extending in an axial direction; a holder holding the feeding roller and attachable to the frame; and a stopper. The holder attached to the frame is movable in the axial direction relative to the frame between: a non-detachable position in which the holder is non-detachable from the frame; and a detachable position in which the holder is detachable from the frame. The stopper is movable between: a restricting position in which the stopper restricts the holder from moving in a specific direction; an allowing position in which the stopper allows the holder to move in the specific direction. The specific direction is a direction from the non-detachable position toward the detachable position. The stopper has a sloped surface configured to contact a portion of the holder on a downstream side in the specific direction.

Provided is a conveying apparatus, including: a conveying roller that conveys a recording medium; a first helical gear that rotates integrally with the conveying roller; a gear unit that engages with the first helical gear and generates a thrust force to the conveying roller. The gear unit includes a second helical gear and a third helical gear, and a thrust force that the conveying roller receives from the second helical gear acts in an opposite direction of a thrust force that the conveying roller receives from the third helical gear.

A binding processing device includes: a binding processing element that advances a binding tooth to a sheet to perform binding processing of the sheet; and a processor that performs control of drying a bound part of the sheet after the binding processing of the sheet by the binding processing element is performed.

A binding processing device includes: a binding processing element that advances a binding tooth to a sheet to perform binding processing of the sheet; and a processor that performs control of drying a bound part of the sheet after the binding processing of the sheet by the binding processing element is performed.