Abstract: An image forming apparatus includes a first housing, a rotary shaft attached to the first housing, a second housing supported by the first housing, and first and second open-close assist members. The second housing is configured to open and close with respect to the first housing by rotating around the rotary shaft. The first and the second open-close assist members are directly attached to the first housing and the second housing and configured to assist opening and closing the second housing. The first and the second open-close assist members share assistance in opening and closing the second housing.

Abstract: An image forming apparatus includes an imaging unit for black and imaging units for other colors, a writing unit for black and a writing unit for other colors, a first heater corresponding to the imaging unit and the writing unit for black color, and a second heater corresponding to the imaging units and the writing unit for other colors. Turning ON/OFF of each of the first heater and the second heater are controlled separately. Thus, the first heater can be ON while the second heater is OFF.

Abstract: An upper frame member is pivotally attached to an apparatus body so as to pivot between a closed position and an open position. The apparatus body is closed when the upper frame member is in the closed position, and the apparatus body is opened to expose an image forming unit when the upper frame member is in the open position. A locking member locks the upper frame member to the apparatus body when the upper frame member is in the closed position. An operation member positioned on a sheet stacking surface releases the locking member to unlock the upper frame member from the apparatus body.

Abstract: A sheet feeding apparatus includes a fixing device to fix a toner image by heat, a discharging tray to accommodating a sheet fixed toner image at the fixing device, a sheet feeding device including a sheet discharging roller to discharge the sheet and positioned downstream of the fixing device, and a sheet cooling device to cool the sheet fixed toner image. The sheet cooling device is located along the direction in which the sheets are stacked and is close to the sheet discharging device. Blocking from adhesion of sheets to each other by melting toner may be prevented by cooling the discharged sheet efficiently after the fixing.

Abstract: The present invention provides an image forming device capable of forming high-quality images and affording high-precision rotating shaft parallelism between surface mobile bodies, and a unit position adjustment method for adjusting the position of a surface mobile body unit relative to the main body of the image forming device. The image forming device comprises a front fixing guide plate as a unit support member for fixing, to a front plate of a structure, a fixing unit serving as a surface mobile body unit which comprises a fixing roller being a surface mobile body, and an upper portion eccentric cam and a horizontal portion eccentric cam serving as a unit position adjustment member for adjusting the position of the front fixing guide plate relative to the front plate.

Abstract: An image forming apparatus includes a housing including a cover configured to cover an opening provided in the housing, a transfer unit configured to move a loop-shaped moving member, a portion of which, across an entire width in a direction perpendicular to a moving direction thereof, being exposed through the opening when the cover is opened, and a sensor unit including a holding member configured to hold a plurality of optical sensors arranged in a direction perpendicular to the moving direction of the loop-shaped moving member and configured to detect detecting respective amounts of light at respective areas different from each other on the loop-shaped moving member, end portions of the sensor unit being fixed in the housing at end portions of the opening in a widthwise direction perpendicular to the moving direction of the loop-shaped moving member.