Equipment for stacking sheets with a stack support, input rollers for feeding entering sheets and transport belts with lower branches arranged above the stack support. A compensation mechanism modifies the height of the stack support, while the transport belts are motorized to drag the entering sheets with the lower branches and deposit the sheets on the stack support or on stacked sheets. An arrest member is provided for the entering sheets, a pressure member for the stack to be stacked and a sensor device for a last sheet of the stack. The arrest member arrests the sheets in stacking while the pressure member is contiguous to the stop member and operates on the last sheet of the stack with a stabilizing function and in which the compensation mechanism is servoized to the sensor, for maintaining constant the height of the last sheet of the stack from a reference plane.

Equipment for stacking sheets with a stack support, input rollers for feeding entering sheets and transport belts with lower branches arranged above the stack support. A compensation mechanism modifies the height of the stack support, while the transport belts are motorized to drag the entering sheets with the lower branches and deposit the sheets on the stack support or on stacked sheets. An arrest member is provided for the entering sheets, a pressure member for the stack to be stacked and a sensor device for a last sheet of the stack. The arrest member arrests the sheets in stacking while the pressure member is contiguous to the stop member and operates on the last sheet of the stack with a stabilizing function and in which the compensation mechanism is servoized to the sensor, for maintaining constant the height of the last sheet of the stack from a reference plane.

There is provided a technique that can suppress upsizing of an apparatus while sorting print media every predetermined number of print media on a stacking portion. To do so, a reciprocating member that reciprocates while being regulated in an X direction orthogonal to a Y direction by a first supporting member is provided, and a second stacking portion extendable in the Y direction relative to the first supporting member is moved in the X direction by action of the reciprocating member.

There is provided a technique that can suppress upsizing of an apparatus while sorting print media every predetermined number of print media on a stacking portion. To do so, a reciprocating member that reciprocates while being regulated in an X direction orthogonal to a Y direction by a first supporting member is provided, and a second stacking portion extendable in the Y direction relative to the first supporting member is moved in the X direction by action of the reciprocating member.

An image forming apparatus includes a body, an image former to form an image on a recording medium, and an inspection table on which the recording medium is placeable. The inspection table includes a placement surface on which the recording medium, on which the image is formed by the image former, is placeable for inspection of the recording medium, a movement support to movably support the placement surface between a use position and a non-use position, and a fixing member to fix the movement support to the body of the image forming apparatus.

An image forming apparatus includes a body, an image former to form an image on a recording medium, and an inspection table on which the recording medium is placeable. The inspection table includes a placement surface on which the recording medium, on which the image is formed by the image former, is placeable for inspection of the recording medium, a movement support to movably support the placement surface between a use position and a non-use position, and a fixing member to fix the movement support to the body of the image forming apparatus.