| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving device that prevents damage and loosening of fastening due to expansion or contraction by heat by preventing stress concentration when a drive roll is rotationally driven by a drive shaft when the drive shaft and the drive roll are fastened, and an image forming apparatus. <P>SOLUTION: The driving device comprises: a drive shaft 72 which includes a screw hole 724 formed at a tip, includes a tip section 723 inserted into a hollow section 71a from a rear end of a drive roll 71 and transmits rotary driving force to the drive roll 71; and a screw rod 73 which includes a male screw 731 screwed into the screw hole 724 and formed at a tip, is inserted into a spring washer 74 at a front end side of the drive roll 71, is further inserted into the hollow section 71a, is screwed into the screw hole 724 formed at the tip of the drive shaft 72 where the male screw 731 is inserted into the hollow section 71a from the rear end and holds the drive roll 71 in a rotation axis direction between the screw rod 73 and a fitting portion 722 of the drive shaft 72 by interposing the spring washer 74. <P>COPYRIGHT: (C)2013,JPO&INPIT |
