| 摘要 |
PROBLEM TO BE SOLVED: To suppress the meandering that arises in an endless belt, such as a transfer belt, with a simple configuration. SOLUTION: A driving roll 22 and a peeling roll 23 rotationally movably stretch and support a secondary transfer conveyance belt 21. The driving roll 22 is rotated by driving of a driving roll drive motor 81 and accordingly the second transfer conveyance belt 21 is rotationally moved and the peeling roll 23 is also rotationally moved. The peeling roll 23 has rollers 231 to 236 arranged in parallel in an axial direction, among which rollers only the roller 231 is driven by a roller drive motor 83. When an in side edge sensor 85 or out side edge sensor 86 detects a belt walk, the driving speed of the roller 231 by the roller drive motor 83 is properly adjusted to produce a speed difference between the speed of the out side and the speed of the in side of the secondary transfer conveyance belt 21. The secondary transfer conveyance belt 21 is thereby moved in the direction where the walk is eliminated. COPYRIGHT: (C)2007,JPO&INPIT
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