Patent ID: 8260182
Filing Date: 2012-09-04
Classification: G03G

Abstract:
1. A belt driving device comprising: a belt member configured to be rotatable; a suspension unit configured to suspend the belt member; a steering device configured to suspend the belt member and to steer the belt member, the steering device including a rotating portion configured to be driven to rotate as the belt member is rotated, friction portions provided on both outer sides of the rotating portion in a width direction of the belt member and held in sliding contact with the belt member, a support unit configured to support the rotating portion and the friction portions, and a rotation shaft configured to rotatably support the support unit, the support unit being rotated by a force generated through the sliding contact between the belt member and the friction portions, so that the steering device allows the belt member to move in the width direction; and a restriction unit provided in the steering device and configured to restrict rotation of the friction portions in a rotating direction of the belt member and to allow rotation of the friction portions in a direction opposite to the rotating direction.