ACCESSORY DRIVING DEVICE FOR VEHICLE

An auxiliary machine-driving device for a vehicle, comprising a first idler roller that is biased in the direction in which the outer peripheral surface of the first idler roller comes into contact with the outer peripheral surfaces of a motor/generator roller and an engine roller, a second idler roller that is biased in the direction in which the outer peripheral surface of the second idler roller comes into contact with the outer peripheral surfaces of the engine roller and a rotating roller, and a third idler roller that is biased in the direction in which the outer peripheral surface of the third idler roller comes into contact with the outer peripheral surfaces of the rotating roller and the motor/generator roller, wherein, when the engine starts, the engine is started by transmitting the driving force of the motor/generator to the engine via the motor/generator roller, the first idler roller, and the engine roller; and after the engine starts, power is generated by the motor/generator by transmitting the driving force of the engine to the motor/generator via the engine roller, the second idler roller, the rotating roller, the third idler roller, and the motor/generator roller.