| 摘要 |
A belt device for use in an image forming apparatus includes two side frames supported by two slide rails disposed at the body of the image forming apparatus on the outside of the outer periphery of the belt member, a rear frame constructed between two sub-frames and having a box-shaped structure, a front frame having a smaller projecting surface than the inner periphery of the belt member as viewed from the front, a support frame that cantilever-supports the front frame with respect to the rear frame, and triangular reinforcing frames constructed across the side frames and the rear frame.
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