| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transfer belt unit capable of minimizing the generation of color shifting, and an image forming device provided therewith. <P>SOLUTION: This transfer belt unit is provided with the first roller for rotation-driving a transfer belt under the condition where the transfer belt is rolledly laid, one or a plurality of second rollers drivenly rotated in accompaniment to the rotation of the transfer belt under the condition where the transfer belt is rolledly laid, and a roller control part for controlling the rotation-driving of the first roller, the second roller includes a low-rolled roller having a roll angle of the transfer belt smaller than a prescribed value, and a diameter of the low-rolled roller is set to satisfy Expression (1): Rb=N*Ra, using a diameter of the first roller as a reference, where Ra represents a rotational speed of the first roller, Rb represents a rotational speed of the low-rolled roller, N is n or 1/n (n:2 or more of integer), the symbol * indicates multiplication, and the symbol / indicates division. <P>COPYRIGHT: (C)2009,JPO&INPIT |
