A sheet conveying device includes: a conveyance path along which a sheet is conveyed; a plurality of butting target members that are arranged beside and alongside the conveyance path and against which a side edge of a sheet being conveyed along the conveyance path is caused to butt; and a butting device that causes the side edge of the sheet to butt against the butting target members by moving, toward the butting target members, the sheet being conveyed along the conveyance path using a plurality of sheet conveying structures that are deviated from each other in a sheet conveying direction, and two or more of the butting target members are located downstream of a sheet conveying structure that is located second in the upstream direction from a most downstream one among the plurality of sheet conveying structures.

A sheet conveying device includes: a conveyance path along which a sheet is conveyed; a plurality of butting target members that are arranged beside and alongside the conveyance path and against which a side edge of a sheet being conveyed along the conveyance path is caused to butt; and a butting device that causes the side edge of the sheet to butt against the butting target members by moving, toward the butting target members, the sheet being conveyed along the conveyance path using a plurality of sheet conveying structures that are deviated from each other in a sheet conveying direction, and two or more of the butting target members are located downstream of a sheet conveying structure that is located second in the upstream direction from a most downstream one among the plurality of sheet conveying structures.

A sheet feeding device includes a feeding roller pair, a detecting portion, a first changing portion, a second changing portion, and a controller for controlling the first changing portion and the second changing portion. The controller starts a first feeding operation for feeding a sheet toward the obliquely feeding roller pair in a nipping state of the feeding roller pair and then starts a second feeding operation for feeding the sheet for abutting a side end of the sheet against the reference member in the nipping state of the obliquely feeding roller pair. The controller changes, after the first feeding operation is started and before the second feeding operation is started, a start timing of the second feeding operation on the basis of a detection result of a position of the side end of the sheet detected by the detecting portion.

A sheet stacking device includes a discharge port, an alignment wall, a discharge tray, an alignment belt, and a guide part. The alignment wall extends in an upper-and-lower direction below the discharge port. The discharge tray is provided so as to be capable of moving up and down along the alignment wall. The alignment belt with endless is stretched along the alignment wall in the upper-and-lower direction. The alignment belt has an inner circumferential surface facing the alignment wall and an outer circumferential surface with which an upstream edge of the sheet stacked on the discharge tray comes into contact, and circulates at a same speed as the discharge tray in synchronization with the discharge tray. The guide part is configured to be provided between the alignment wall and the alignment belt. With the guide part, the inner circumferential surface of the alignment belt slides in contact.

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.

To provide a configuration for allowing a user to easily take out a sheet stopped on a conveying belt. Regulating guides are disposed on both sides of a conveying belt in a sheet width direction Y and can guide both end edges in the sheet width direction of a sheet S being conveyed while being nipped by the conveying belt and the balls. A take-out port is provided on a side close to the regulating guide in the sheet width direction and serves as an opening for taking out the sheet stopped on the conveying belt. The regulating guide on a side away from the take-out port moves in the sheet width direction Y toward the take-out port when the sheet is stopped on the conveying belt.

An image forming apparatus includes a main body, an image forming unit, a sheet tray disposed below the image forming unit, and a retransport assembly configured to transport a sheet along a retransport path including first, second, and third retransport path portions in a transport direction. The retransport assembly includes a portion of the sheet tray defining the first retransport path portion, a connecting unit and a retransport unit, which are disposed below the sheet tray. The connecting unit defines the second retransport path portion connected to an upstream end of the third retransport path portion in the transport direction. The retransport unit is movable between a stored position and a pulled-out position. The retransport unit at the stored position defines the first retransport path portion connected to an upstream end of the second retransport path portion in the transport direction.

A pair of regulating guides can guide both end edges in a sheet width direction Y of a sheet being conveyed being nipped by a conveying belt and balls. The pair of regulating guides can move to their respective guide positions each for guiding one of both end edges of the sheet and their respective retracting positions each retracting from one of the both end edges of the sheet by a distance larger than the guide position. A guide moving unit for moving the pair of regulating guides makes each of the pair of regulating guides reach the guide position from the retracting position after the rear end of the sheet passed from a conveying roller pair positioned on the upstream side to the conveying belt passes the conveying roller pair.

A sheet conveyance device capable of reducing occurrence of creases on a sheet. A pair of first conveyance rollers nip and convey a sheet. A pair of second conveyance rollers arranged downstream of the first conveyance rollers in a sheet conveyance direction nip and convey the sheet. A pair of registration rollers arranged downstream of the second conveyance rollers nip and convey the sheet after correcting skew of the sheet. A switching mechanism switches a state of the second conveyance rollers between a contact state and a separated state. A control unit that controls the rollers and the switching mechanism executes a first conveyance operation that conveys the sheet with the first conveyance rollers and the registration rollers after correcting the skew in the separated state and in a state where a sheet conveyance speed by the registration rollers is higher than that by the first conveyance rollers.

A sheet conveyance apparatus includes a conveyance roller, an abutment member including an abutment surface against which a side edge, in a width direction, of the sheet abuts, and configured to correct a skew of the sheet, an obliquely conveying roller configured to convey the sheet such as the side edge of the sheet is conveyed toward the abutment surface, a sheet side edge detection portion configured to detect a position of the side edge of the sheet, and a control unit configured to control that a conveyance force, in the width direction, by the obliquely conveying roller in response to a detection result of the sheet side edge detection portion becomes smaller than that in an abutment movement.