Provided is an image forming apparatus including: an image forming unit configured to form an image on a sheet fed from a container; a trailing edge regulating plate, which is movable in a feeding direction inside the container, and is configured to regulate a trailing edge position of the sheet; a detector configured to automatically detect a sheet size based on the position of the trailing edge regulating plate; and a receiver configured to receive a size of the sheet to be set for the container as a user set size.

Provided is an image forming apparatus including: an image forming unit configured to form an image on a sheet fed from a container; a trailing edge regulating plate, which is movable in a feeding direction inside the container, and is configured to regulate a trailing edge position of the sheet; a detector configured to automatically detect a sheet size based on the position of the trailing edge regulating plate; and a receiver configured to receive a size of the sheet to be set for the container as a user set size.

In a sheet conveyor, a stopper piece of a sheet stopper temporarily stops a sheet supported on a sheet tray, and a pickup roller conveys the sheet from the sheet tray in a sheet conveying direction. A first sheet sensor disposed upstream of a registration roller and downstream of the stopper piece in the sheet conveying direction detects a leading edge of the sheet, and a second sheet sensor disposed downstream of the registration roller detects the leading edge of the sheet. A first contact member of the first sheet sensor receives the leading edge of the sheet. A second contact member of the second sheet sensor receives the leading edge of the sheet. The stopper piece, the first contact member, and the second contact member are offset from each other in a direction perpendicular to the sheet conveying direction and unaligned with each other in the sheet conveying direction.

In a sheet conveyor, a stopper piece of a sheet stopper temporarily stops a sheet supported on a sheet tray, and a pickup roller conveys the sheet from the sheet tray in a sheet conveying direction. A first sheet sensor disposed upstream of a registration roller and downstream of the stopper piece in the sheet conveying direction detects a leading edge of the sheet, and a second sheet sensor disposed downstream of the registration roller detects the leading edge of the sheet. A first contact member of the first sheet sensor receives the leading edge of the sheet. A second contact member of the second sheet sensor receives the leading edge of the sheet. The stopper piece, the first contact member, and the second contact member are offset from each other in a direction perpendicular to the sheet conveying direction and unaligned with each other in the sheet conveying direction.

An image forming apparatus includes: a transfer section that transfers an image onto a sheet; a sheet conveying member that conveys the sheet, the sheet conveying member being provided upstream of the transfer section in a sheet conveyance direction; and a hardware processor that controls displacement of the sheet conveying member so that the sheet is displaced along a width direction of the sheet. The hardware processor sets a displacement speed of the sheet conveying member for the sheet during transfer of the image by the transfer section to be lower than the displacement speed of the sheet conveying member for the sheet before the transfer of the image by the transfer section.

An image forming apparatus includes: a transfer section that transfers an image onto a sheet; a sheet conveying member that conveys the sheet, the sheet conveying member being provided upstream of the transfer section in a sheet conveyance direction; and a hardware processor that controls displacement of the sheet conveying member so that the sheet is displaced along a width direction of the sheet. The hardware processor sets a displacement speed of the sheet conveying member for the sheet during transfer of the image by the transfer section to be lower than the displacement speed of the sheet conveying member for the sheet before the transfer of the image by the transfer section.

A sheet conveying device, which is included in an image forming apparatus, includes a pair of rollers configured to convey a sheet in a sheet conveyance passage, a detector configured to optically detect an attitude of the sheet, one of a rotation device to rotate the pair of rollers in a direction parallel to a plane of the sheet and a moving device to move the pair of rollers in a width direction, and a controller configured to correct the attitude of the pair of rollers at a time interval, based on a detection result obtained by the detector. The controller performs the correcting operation by setting, according to reflectance of the sheet, at least one of a light emission time of the detector, the time interval of the correcting operation, light emission intensity of the detector and a conveying speed of the sheet.

The image forming apparatus includes a transfer section that transfers an image to a sheet; a sheet conveying member that is provided on an upstream side of the transfer section in a conveying direction of the sheet and that conveys the sheet; and a hardware processor that controls displacement of the sheet conveying member such that the sheet is displaced in a width direction of the sheet. The hardware processor causes a detector that detects an edge of the sheet in the width direction to detect the edge of the sheet after displacement of the sheet conveying member has been started, and causes the displacement to be terminated on the basis of the detected result such that the edge of the sheet reaches a target position.

The image forming apparatus includes a transfer section that transfers an image to a sheet; a sheet conveying member that is provided on an upstream side of the transfer section in a conveying direction of the sheet and that conveys the sheet; and a hardware processor that controls displacement of the sheet conveying member such that the sheet is displaced in a width direction of the sheet. The hardware processor causes a detector that detects an edge of the sheet in the width direction to detect the edge of the sheet after displacement of the sheet conveying member has been started, and causes the displacement to be terminated on the basis of the detected result such that the edge of the sheet reaches a target position.

A paper sheet transport apparatus (10) includes transport member that is slidable along the widthwise direction of a transport path (11) (e.g., a drive roller (36) and a driven roller (38)), and a paper sheet detection unit (inlet-side paper sheet detection sensor (70)) that is arranged on an upstream side of the transport member in the paper sheet transport direction along the transport path (11) and detects the position of the paper sheet in the widthwise direction of the transport path (11). A control unit (80) calculates an amount of movement of the transport member based on the position of the paper sheet in the widthwise direction of the transport path (11) detected by the paper sheet detection unit and a previously set predetermined position of the paper sheet in the widthwise direction of the transport path (11).