Patent ID: 7957672
Filing Date: 2011-06-07
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a belt unit includes a belt, a plurality of rollers supporting the belt, and a frame rotatably supporting the rollers; and an apparatus main body in which the belt unit is detachably mounted; wherein the belt unit comprises: a securing member disposed at an inner surface side of the belt and configured to impart a tensile force to the belt when the belt unit is detached from the apparatus main body; and an urging device that imparts the tensile force to the belt by generating an urge that applies an outward force to the securing member in a state in which the belt unit is detached from the apparatus main body; wherein the apparatus main body comprises: a tension imparting device that imparts an operating tensile force to the belt of the belt unit in a mounted state; and wherein the tensile force imparted to the belt by the urging device is less than the operating tensile force that is imparted to the belt by the tension imparting device.