| 摘要 |
<p>PURPOSE: To prevent the occurrence of image stretch, trail end missing, image soiling due to the image rubbing or the like by effectively suppressing fluctuation of hold- transporting speed of a member to be transported by supporting a rotary drive roller and a counter member stationary with a rigid material member so as to maintain the distance between a rotary shaft center of the rotary drive roller and the counter member constant in spite of thermal expansion of the rotary drive roller. CONSTITUTION: A pair of left and right rigid material side board 6 is provided with holes 6a to which respective barings 41 for supporting both end parts of a core bar 4a of a pressure roller 4 are fitted, and holes 6b to which respective projecting arm parts 1a extended outside of both end parts of a heater holder 1 are fitted respectively symmetrically the baring 41 is fitted to the holes 6a. As a result, the pressure roller 4 and the heater holder 1 is respectively stationary supported by the side board 6 in a state of press contact. Therefore, even if outside diameter of the pressure roller 4 becomes larger due to thermal expansion, the roller radius from a shaft center of the pressure roller 4 to the center of press contact nipping part is not changed, thus the hold-transport speed of the transport member at the press contact nipping part is not changed.</p> |
