| 摘要 |
<p>An image forming apparatus and a belt unit are provided. The image forming apparatus or the belt unit includes: an endless belt (14); a driving roller; a driven roller (16); a tension generating member (18,19) which generates a tension at the belt; a displacement member (21) which is provided to be displaced in a displacement direction parallel to the axial direction (D 2 ) of the driven roller together with the belt when the belt is moved in a moving direction along the displacement direction; and an axial force converting unit (20,22) which converts a force (F 1 ) of displacing the displacement member into a force (F 2 ) which is directed in a direction intersecting the displacement direction and causes the tension generated at the belt to change such that a ratio of a tension generated on a trailing side in the moving direction of the belt to a tension generated on a leading side in the moving direction is decreased.</p> |
