A medium transport device includes a medium guide member, a driving source, a first movement member, a movement restricting member, and a second moving member. The medium guide member is movable between a first guide position, in which the medium guide member guides a medium toward a receiving member on which the medium is loaded, and a second guide position, in which the medium guide member guides the medium from the receiving member into the device. The driving source moves the medium guide member. The first movement member moves the medium guide member in accordance with an operation of the driving source. The movement restricting member is movable together with the medium guide member. The second moving member is movable between a first position, in which the second moving member is located close to the movement restricting member to restrict the medium guide member from moving from the second guide position to the first guide position, and a second position, in which the second moving member is spaced apart from the movement restricting member to allow the medium guide member to move to the first guide position. The second moving member moves from the first position to the second position when the medium guide member moves toward the first guide position in response to an operation of the driving source.

A finisher apparatus includes an actuator to control a component of the finisher apparatus to perform a finishing operation on a print medium. A sensor is provided to sense the print medium in a print-medium path in the finisher apparatus. A processor is coupled to the actuator and the sensor. The processor is to execute instructions. The instructions are to actuate the actuator to eject the print medium from the print-medium path in response to a signal from the sensor indicative of a jam of the print medium in the finisher apparatus.

A sheet conveyance device includes a sheet receiving part, a first discharge part, a sheet conveyance path, an escape conveyance path, a branch guide, an escape tray, a second discharge part, and a first sheet detection part. When a device failure occurs, the branch guide switches the conveyance direction such that the sheet remaining on the sheet conveyance path is discharged on the escape tray by the second discharge part, through the escape conveyance path sequentially. Then, the second discharge part stops a discharging of the sheet in a state where the sheet remains in the second discharge part when the sheet is a last sheet to be conveyed to the escape tray. Then, a receiving of a new sheet to the sheet receiving part from the image forming apparatus is inhibited while the first sheet detection part detects the last sheet.

A sheet conveyance apparatus include a first conveyance unit, a second conveyance unit including a cover and configured to be movable between a first position where a sheet conveyed from the first conveyance unit can be conveyed to a sheet conveyance path and a second position separated from the first position, and a retaining portion configured to retain the cover at an open position and to retain the second conveyance unit at the second position through the cover retained at the open position in a case where the cover is positioned at the open position in a condition in which the second conveyance unit is positioned at the second position.

A medium transport device includes a medium guide member, a driving source, a first movement member, a movement restricting member, and a second moving member. The medium guide member is movable between a first guide position, in which the medium guide member guides a medium toward a receiving member on which the medium is loaded, and a second guide position, in which the medium guide member guides the medium from the receiving member into the device. The driving source moves the medium guide member. The first movement member moves the medium guide member in accordance with an operation of the driving source. The movement restricting member is movable together with the medium guide member. The second moving member is movable between a first position, in which the second moving member is located close to the movement restricting member to restrict the medium guide member from moving from the second guide position to the first guide position, and a second position, in which the second moving member is spaced apart from the movement restricting member to allow the medium guide member to move to the first guide position. The second moving member moves from the first position to the second position when the medium guide member moves toward the first guide position in response to an operation of the driving source.

An image forming apparatus including: an image forming unit; a reverse conveying roller; a discharge unit including: a reverse conveying path; an openable and closable member; an open/close sensor; a discharge tray; a sheet conveyance unit; and a failure detector; and a controller, wherein in a case in which the controller determines that the sheet conveyance unit is in failure based on a detection result of the failure detector and determines that the openable and closable member is closed based on a detection result of the open/close sensor, the controller prohibits discharge of the sheet to the discharge tray and permits conveyance of the sheet to the reverse conveying path, and in a case in which the controller determines that the sheet conveyance unit is in failure and determines that the openable and closable member is open, the controller prohibits the conveyance of the sheet to the reverse conveying path.

A sheet conveyance apparatus includes a sheet conveyance roller pair to convey a sheet, a first opening and closing guide that opens to a first opened position in which a first conveyance path through which a sheet is conveyed is opened and closes to a first closed position in which a sheet is conveyed in the first conveyance path, and a second opening and closing guide that opens to a second opened position in which a second conveyance path is opened and closes to a second closed position in which a sheet is conveyed in the second conveyance path. A first member is provided on the first opening and closing guide, and a second member is provided on the second opening and closing guide and pivots between a first position and a second position with respect to the second opening and closing guide.

The medium stacking device 30 includes a stacking platform 31 on which the image printed medium M can be placed, a movable fence MF that moves between a restriction position that restricts the edge portion of the medium M to be discharged toward the stacking platform 31 and a retreat position retreated from the restriction position, and the control section 93 that performs the control to move the movable fence MF from the restriction position to the retreat position and back to the restriction position when a placement defect of the medium M on the stacking platform 31 is detected, wherein the control section 93 determines the movement amount MA from the restriction position to the retreat position based on the medium information of the medium M and the printing information of the image.

A sheet conveyance apparatus includes a first conveyance unit configured to form a first nip portion, a second conveyance unit configured to convey the sheet, and a guide unit configured to form a curved conveyance path. The guide unit includes a first guide, a second guide, a first driven roller rotatably driven with respect to the sheet by coming into contact with the sheet at a first contact point, and a second driven roller rotatably driven with respect to the sheet by coming into contact with the sheet at a second contact point. When viewed in a width direction orthogonal to the sheet conveyance direction, the first guide is formed so as not to intersect with a straight line passing through the first contact point and the second contact point on a side further upstream than the first contact point in the sheet conveyance direction.

A media conveying apparatus includes a media tray, a feed roller, a first media sensor, a second media sensor, and circuitry. The first media sensor is located downstream from the feed roller in a media conveyance direction. The first media sensor is located inside of a side wall of a media conveyance path and outside of a maximum size media supported by the media conveying apparatus placed on the media tray in a direction perpendicular to the media conveyance direction. The second media sensor is located downstream from the first media sensor in the media conveyance direction. The circuitry executes error handling based on a detection result of the medium by the first media sensor and a detection result of the medium by the second media sensor.