| 摘要 |
PROBLEM TO BE SOLVED: To prevent a belt from being misaligned and disengaged from a belt unit. SOLUTION: When the belt unit 15 is disengaged from the body casing 2, a tension roller 16 is fixed to a position, where the roller is overhung outward by a fixing member 55. As a result, since a conveyance belt 18 is stretched, the conveyance belt 18 is prevented from being misaligned and disengaged. Also, when the belt unit 15 is mounted on the body casing 2, the fixation of a tension roller 16 by the fixing member 55 is released by a release projection 73, and appropriate tension is applied to the conveyance belt 18 by a coil spring 72 disposed at the body casing 2 side. COPYRIGHT: (C)2007,JPO&INPIT
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