| 摘要 |
PURPOSE:To prevent the setting of the pressing of a drum shaft from being forgotten by bringing the outsides of respect other sides into contact with the top surfaces of both end parts of the drum shaft when a cover is removed, and engaging a first engaging part with a second engaging part in a direction where movement in the upper direction of the drum shaft is blocked. CONSTITUTION:When a drum unit 2 is set to a frame 35, the drum shaft 31 is inserted into the bearing part 36 of the frame 35 and held, and cover pressing members 14 are turned downward, respectively, so that the cover 22 is removed. Simultaneously, the outsides of respect other sides come into contact with the top surfaces of both end parts of the drum shaft 31, and the first engaging part 16 of the cover pressing members 14 is engaged with the second engaging parts 19 of the frame 35, and the movement of the drum shaft 31 in the upper direction is blocked. Therefore, the pressing of the drum shaft 31 can not be forgotten, the movement of the photosensitive body 3 in the upper direction is prevented, and printing grade is secured. |
