| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a belt drive transmission device preventing belt from falling off a pulley caused by the deviation of the a belt when a rotary body rotating carrying an image is rotatively driven. <P>SOLUTION: A drum shaft 3 of a photoconductor drum 4 is rotatably supported in a frame 1 of an image forming device. A drum pulley 8 is fit to the drum shaft 3 through a bearing 2. A drum pulley 8 is fit to the drum shaft 3. A motor 10 is fit to a frame 1. A motor pulley 11 is press-fit to a driving shaft 10a of the motor 10. A steel belt 9 is built across the motor pulley 11 and a drum pulley 8. The drum pulley 8 is constituted with a magnetic material drum pulley 8-1 comprising a magnetic material. The belt 9 is constituted with a magnetic material belt 9-1 comprising the magnetic material. The magnetic material belt 9-1 is attracted to the magnetic material drum pulley 8-1 with magnetic force, and the falling off of the magnetic material belt 9-1 from the magnetic material drum pulley 8-1 is prevented. <P>COPYRIGHT: (C)2003,JPO |
