| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of improving workability in replacement of a drum unit and a developing unit.SOLUTION: When engagement of hooks 83, 83 and an apparatus body is released, a contact part 53a of a shaft member 53 is protruded from each of front faces of developing units 3a to 3d by urging force of a compression spring 54, and a positioning device 60 is held at a second position rotated in an upward direction by a predetermined angle from a first position. At this time, fitting-in of drum shafts 1ato 1dto bearing holes 73a to 73d, and fitting-in of positioning pins 74, 74 to a front side plate 41 are also released. |
