A paper feed tray includes a cassette, a regulation plate which is slidably attached to the cassette, a cover provided to the regulation plate, a locking portion which is covered with the cover and engages with the cassette to fix a position of the regulation plate, and a lever. The lever includes a coupling portion coupled with the locking portion, a depression portion configured to be depressed toward one side in a direction of sliding of the regulation plate, and an intermediate portion provided between the coupling portion and the depression portion. The lever operates the locking portion to be disengaged from the cassette upon the depression portion being depressed toward the one side. The cover includes an extension extending while facing the intermediate portion. A space, which is open at a tip to which the extension extends, is formed between the extension and the intermediate portion.

A roller arrangement for a web processing system, the roller arrangement comprising a roller and at least one rotational shaft having a shaft portion and an attachment portion and wherein the at least one rotational shaft is releasably connectable to the roller.

A sheet storage cassette includes a cassette body, a cassette cover, and a lock mechanism. The lock mechanism includes a lock member swingably provided on a back-surface side of the cassette cover and engageable with a locking pin provided in the cassette insertion portion, and a biasing member biasing the lock member in a direction toward engagement with the locking pin. Along with an operation of inserting the cassette body into the cassette insertion portion, the lock member engages with the locking pin. In a state where the cassette body is inserted in the cassette insertion portion, by inserting a thin-plate shaped release member into a gap between the cassette cover and an exterior member arranged under and adjacent to the cassette cover, the lock member is caused to swing to release the engagement with the locking pin.

A transport device includes a body unit, an accommodating unit that accommodates a recording medium and is mounted to be reciprocal with respect to the body unit, a pair of guide members that come in contact with end portions, in a width direction, of the recording medium to position the recording medium, the width direction intersecting with a transport direction of the recording medium, a first rail that is attached to the accommodating unit and guides reciprocation of the accommodating unit, and a second rail that is attached to the body unit to be movable in a direction, which intersects with a reciprocation direction of the accommodating unit, the second rail being assembled to the body unit to be slidable with respect to the first rail.

A sheet feeding cartridge attached to or detached from a cartridge storing part formed between a pair of side face covers which constitute a part of an exterior cover of an apparatus main body. The sheet feeding cartridge includes a cartridge base on which a sheet is stacked, a cartridge cover attached so as to be slidable in a width direction perpendicular to the attachment direction, a first positioning part configured to position the cartridge base to the cartridge storing part and a second positioning part configured to position the cartridge cover with respect to the side face covers in the width direction perpendicular to the attachment direction.

An image-forming apparatus includes: a casing; a first sheet tray provided in a bottom portion of the casing; an image-forming unit configured to form an image on a sheet supplied from a sheet accommodation portion of the first sheet tray; a sheet supplying path; a first conveying path; and a shutter. The sheet supplying path is configured to provide communication between the sheet accommodation portion and the image-forming unit. The first conveying path is provided in one of the casing and the first sheet tray, and has one end formed with an opening and another end configured to communicate with the sheet supplying path, the opening being open downward. The shutter is movable between a closing position closing the first conveying path and an opening position opening the first conveying path.

An image forming apparatus includes: a conveying unit configured to convey a sheet along a conveyance path group including at least a first conveyance path and a second conveyance path joining the first conveyance path; an image forming unit; and a path switcher, wherein: the path switcher includes: a guide unit configured to rotate about a guide supporting point and rotate between a first position and a second position; a protruding portion fixed to the guide unit; a drive lever having a first pressing surface and a second pressing surface; a first force applying unit; and a second force applying unit; the drive lever includes: a first lever; a second lever; a third force applying unit; and a restraining portion configured to set a moving end on the rotation of the second lever; and the restraining portion restricts the moving end of the second lever to a predetermined position.

A sheet feeding device includes a feeder, a contact member, a movement restricting member, a moving mechanism, and control circuitry. The feeder is configured to feed a sheet. A leading end of the sheet in a feeding direction is to contact the contact member. The movement restricting member is configured to lock the contact member to restrict movement of the contact member from a contact position where the contact member contacts the sheet. The moving mechanism is configured to move the movement restricting member between a locking position and a lock releasing position. The contact member is configured to take the contact position by gravity or a biasing force of a biasing part. The control circuitry is configured to control the moving mechanism to move the movement restricting member to the lock releasing position and then to the locking position when a feeding operation of the sheet is finished.

A sheet conveying device has a body and a frame supporting it, and is insertable or extractable along a sheet stacking face formed in an in-body discharge space in an image forming apparatus and having an inclined face with an upward gradient toward the downstream side in the sheet discharge direction. On the face of the frame opposite the sheet stacking face, a plurality of first and second wheels rotatable in the insertion or extraction direction are provided downward of the center of the opposite face in the insertion direction. The first wheels are arranged downstream of the second wheels in the insertion direction, and protrude from the opposite face farther than the second wheels. The first wheels fit into a concave portion formed in the sheet stacking face by the inclined face and thereby enable the second wheels to make contact with the sheet stacking face.

A relay conveyance device detachably mounted on an image forming apparatus body is provided with a fixing member that holds a mounting state of the relay conveyance device to the image forming apparatus body. The fixing member is provided with a relay connector that relays the image forming apparatus body and the post-processing device. The post-processing device is electrically connected to the image forming apparatus body via the relay connector.