Patent ID: 8550732

Claim:
An intermediate transfer medium conveying device for conveying a belt-like intermediate transfer medium, which is wound between a winding reel and a feeding reel, by a drive force of one DC motor in a normal feed direction where the intermediate transfer medium is wound on the winding reel and in a reverse feed direction where the intermediate transfer medium is wound on the feeding reel, the intermediate transfer medium conveying device comprising: a winding shaft that rotationally drives the winding reel during normal feed where the intermediate transfer medium is conveyed in the normal feed direction; a feeding shaft that rotationally drives the feeding reel during reverse feed where the intermediate transfer medium is conveyed in the reverse feed direction; transmission means for normal feed that transmits a drive force of the DC motor to the winding shaft during the normal feed, wherein during the normal feed, the drive force of the DC motor is transmitted to the winding shaft directly without a torque limiter; and transmission means for reverse feed that transmits a drive force of the DC motor to the feeding shaft during the reverse feed, wherein during the reverse feed, the drive force of the DC motor is not transmitted to the winding shaft, and the back tension is applied to the winding shaft by the torque limiter, wherein the transmission means for normal feed includes first transmission means and second transmission means, the first transmission means is formed so as to directly transmit a drive force of the DC motor to the winding shaft, the second transmission means is formed so as to transmit a drive force of the DC motor to the winding shaft through the torque limiter for reverse feed that applies back tension to the intermediate transfer medium during the reverse feed, the conveyance of the intermediate transfer medium in the normal feed direction and the conveyance of the intermediate transfer medium in the reverse feed direction are inverted to each other by the rotation direction of the DC motor, and a winding force, which is generated by the winding shaft when the intermediate transfer medium is wound on the winding reel, is changed by a voltage applied to the DC motor.