A container member includes a container body that contains a recording medium and that tilts such that a leading edge of the contained recording medium is higher than a trailing edge, and a leading edge restriction portion that comes into contact with a portion of the leading edge except for at least a first end portion and that restricts a position of the leading edge.

A medium transport device includes a lower guide member, a processing tray, a feeding section, and a notch. The lower guide member supports a medium transported and guides the medium toward the processing tray. The processing tray includes an alignment member, and a plurality of media are stacked in the processing tray. The feeding section includes a paddle member having a rotation center between the processing tray and the lower guide member such that a rotation locus of a distal end intersects the lower guide member, and the feeding section is configured to feed the medium toward the alignment member. The lower guide member has a notch, and an upstream end of the notch in the transport direction is formed at a position inside the rotation locus in the lower guide member.

A sheet discharge device includes a sheet discharge portion, a sheet loading portion, and a stopper mechanism. The stopper mechanism includes a first stopper supported pivotably to a first retraction position and a first restriction position, a second stopper that is movable to a first position at which the second stopper is housed along a downstream end part of the sheet loading portion and a second position apart from the first position to a downstream side in a sheet discharge direction and is supported pivotably to a second retraction position and a second restriction position, and a link mechanism connecting the first stopper to the second stopper. When the second stopper is disposed at the first position, the first stopper is disposed at the first restriction position, and when the second stopper is disposed at the second position, the first stopper is disposed at the first retraction position.

An image forming apparatus includes a paper discharging tray and a paper detection part disposed at an upstream end of the paper discharging tray in a paper discharge direction. The paper detection part includes a base end member provided rotatably around a first axis extending in a direction perpendicular to a paper discharge direction and a tip member pivoted to the base end member to rotate around a second axis parallel to the first axis, and extending downwardly to incline toward an upstream side of the paper discharge direction in a state where the base end member is not subjected to pressure from the paper being discharged. The base end member is disposed to face a discharge opening when being at the reference position, and the image forming apparatus stops discharging paper from the discharge opening when the base end member rotates by a predetermined threshold or more with respect to the reference position.

A sheet processing apparatus includes a conveying portion, a conveying path, a discharge port, a stacking portion, a manual setting portion, a binding device which binds a sheet bundle formed by the stacking portion and a sheet bundle set at the manual setting portion by a staple, a first regulating portion which regulates a position of the sheet bundle at a rear side of the apparatus in a width direction, and a second regulating portion which regulates a position of the sheet bundle in the conveying direction. The binding device is formed to be movable back and forth to a front side and the rear side of the apparatus. When a staple is replenished to the binding device, the binding device is positioned at the third position so that a cartridge of the staple is loaded into the binding device from the front side of the apparatus.

Provided is a document conveying apparatus that properly discharges documents regardless of the amount of documents stacked on a discharge tray without complicated construction of a transmission mechanism for transmitting a driving force to conveying rollers. A conveying roller pair is provided at an end portion on an upstream side. A swing mechanism swings a discharge mechanism centered around a drive shaft of the conveying roller pair. An upper surface height measuring unit measures the height of the upper surface of documents stacked on the discharge tray. A control unit, by causing the swing mechanism to swing the discharge mechanism according to the height measured by the upper surface height measuring unit, performs control so that the difference between a discharge port and the upper surface of the documents stacked on the discharge tray is within a specified range.

A post-processing device includes a first discharge section that discharges a medium subjected to recording by a recording device, a first tray on which the medium discharged by the first discharge section is mounted, a post-processing section that performs post-processing on the medium mounted on the first tray, a pressing section configured to perform a leading-end pressing operation of lowering a leading end of the medium by pressing the medium discharged by the first discharge section, and a control section that controls the pressing section, in which the control section performs the leading-end pressing operation after the medium is mounted on the first tray.

A stacking unit includes a processing tray, an alignment section, a transport section, and a moving section. The processing tray has a placement area in which one or more paper sheets are placed. The alignment section aligns leading edges of the paper sheets. The transport section transports the paper sheets to the alignment section. The moving section moves the paper sheets in ±X directions. The alignment section includes: a first alignment surface having a first friction coefficient; and a second alignment surface having a second friction coefficient. The second alignment surface is positioned upstream of the first alignment surface in a +A direction and closer to a center of the placement area in the ±X directions than the first alignment surface is.

A sheet discharge device includes a sheet discharge portion, a sheet loading portion, and a stopper mechanism. The stopper mechanism includes a first stopper supported pivotably to a first retraction position and a first restriction position, a second stopper that is movable to a first position at which the second stopper is housed along a downstream end part of the sheet loading portion and a second position apart from the first position to a downstream side in a sheet discharge direction and is supported pivotably to a second retraction position and a second restriction position, and a link mechanism connecting the first stopper to the second stopper. When the second stopper is disposed at the first position, the first stopper is disposed at the first restriction position, and when the second stopper is disposed at the second position, the first stopper is disposed at the first retraction position.

An image forming apparatus for forming an image on a recording medium, the image forming apparatus includes a discharge tray for supporting the recording medium, an internal unit disposed inside the apparatus main body, and a door serving as a part of outer surface members of the apparatus main body, the door being opened and closed to expose and cover an inside of the apparatus main body to the outside, wherein, by opening of the door, a fixing member that fixes the discharge tray to the apparatus main body is exposed to the outside, and removing of the fixing member from the apparatus main body allows the discharge tray to be detached from the apparatus main body without removing the outer surface members other than the door, and wherein detaching of the discharge tray from the apparatus main body allows the internal unit to be accessed.