| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt drive device that suppresses the separation of a plurality of divided frame body parts in a support frame supporting a plurality of rollers including a steering roller, and an image forming apparatus including the same.SOLUTION: In a belt drive device 30 that includes a support frame body 60 including a first frame body part 61, and a second frame body part 63 that is tiltably supported by the first frame body part 61 and supports a steering roller 33, a steering mechanism 80 includes an operation part 84a, an operation target part 85, regulation means 82 provided in the first frame body part 63 for regulating the tilting direction of the second frame body part 63, and regulation target means 83 provided in the second frame body 63 to be engaged with the regulation means 82 to be moved on the regulation means 82, where in a view of a direction intersecting the conveyance direction of a belt 31, when a straight line connecting the contact part O of the operation part 84a and operation target part 85 and the middle point Tc of the engagement part of the regulation target means 83 and regulation means 82 in the direction of movement of regulation target means 83 is a line segment OTc, the direction of the line segment OTc intersects the direction of movement of the regulation target means 83. |
