| 摘要 |
First eccentric cams ( 211, 221 ) for abutting an inner circumferential surface of an intermediate image transferring belt ( 11 ), second eccentric cams ( 212, 222 ) for rotating as a unit with the first eccentric cams ( 211, 221 ), cam followers ( 214, 224 ) for abutting a circumferential surface of the second eccentric cam ( 212, 222 ), and transmitting members ( 215 A through 215 D) for holding image transferring rollers ( 13 A through 13 D), moving in response to the cam followers ( 214, 224 ) are disposed within a loop-shaped moving path formed by an intermediate image transferring belt ( 11 ), which is stretched across a driving roller ( 11 A) and a driven roller ( 11 B). The vertical position of the image transferring rollers ( 13 A through 13 D), which are held by the transmitting members ( 215 A through 215 D), changes in accordance with the abutting state of the first eccentric cams ( 211, 221 ) with respect to an inner circumferential surface of the intermediate image transferring belt ( 11 ).
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