| 摘要 |
A belt fixing device includes a fixing roller, a heating roller, a fixing belt stretched between the fixing roller and the heating roller, and a pressing roller pressing the fixing roller through the fixing belt. In at least one end portion of the heating roller in an axial direction, a ring regulating skewed movement of the fixing belt toward an axial end, a belt tension adjusting unit regulating tension of the fixing belt, and a ring separating/contacting unit operating in conjunction with the belt tension adjusting unit to separate the ring from the fixing belt or to bring the ring into contact with the fixing belt are provided.
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