| 摘要 |
PROBLEM TO BE SOLVED: To provide a drum supporting structure configured to reduce the burden on maintenance cost of an image forming apparatus, without reducing image quality, and to provide the image forming apparatus and a bearing.SOLUTION: A photoreceptor drum 13 receives loads F1-F5 from a charging roller 18, a primary transfer roller 30, a magnet roller 38, a cleaning roller 42, and a cleaning blade 41. A composite load formed by combining the loads F1-F5 is a load F6. Planes W1, W2 are portions of an inner peripheral surface 205 of a fitting part 201 of a bearing 200, including two points (K1, K2), which are line-symmetric to each other with respect to a direction of the load F6, so that the inner peripheral surface and a flange 131 are brought into contact with each other at the two points (K1, K2). The two points (K1, K2) are arranged at an interval of 120 degrees with respect to a sectional center C1 of the flange 131 of the photoreceptor drum 13. |
