| 摘要 |
PROBLEM TO BE SOLVED: To dissolve failures which are fluctuation and speed irregularities of a photoreceptor circumferential speed due to transmission to a photoreceptor driving system of noise of load fluctuation and vibration, etc., generated at members to be driven constituting units other than a photoreceptor and deterioration of image quality due to that without complicating a structure and a control procedure. SOLUTION: A photoreceptor driving device is provided with the photoreceptor rotationally driven by a photoreceptor driving shaft 1, a plurality of the units arranged around the photoreceptor, and photoreceptor side and unit side timing belts 3 and 17 respectively transmitting driving force from an output pulley 22 of a driving motor 21 to a photoreceptor pulley 2 provided on the photoreceptor driving shaft and unit pulleys provided on respective unit driving shafts 11 and 15. The photoreceptor pulley is composed of a boss part 31 of a small diameter fixed by inserting a shaft hole to the photoreceptor driving shaft and a pulley main body 41 of a large diameter. The boss part is provided with a plurality of projections 34 on one end face in an axial direction, the pulley main body is provided with recessed parts 44 for receiving and coupling the projections of the boss part on one end face of it and an elastic member 35 is interposed between a side face of the projection of the boss part and an inner wall of the recessed part. |
