| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent displacement of the centers of an image forming body and image exposure means during the replacement of the image forming body and maintenance by providing a cylindrical support member which supports the image exposure means so as to surround the outside of the cylindrical image forming body, and attaching bearings for the support shaft of the image forming body to the centers of the side plates of it. SOLUTION: The cylindrical support member 50 to which the exposure unit 12 for each color is attached is fitted through the hole 40a of the front side-plate 40 of a device main body, a back flange 55 is connected to the pin 42 of the back side-plate 41 of it, and a front flange 54 is fixed to the front side-plate 40 with a screw 57. The cylindrical photoreceptor drum 10 is fitted onto a support shaft 30, and with the drum enclosed by the cylindrical support member 50 the support shaft 30 is fitted into the bearings 57 and 61 provided at the centers of the side plates 56 and 60 of the support member 50. Because the photoreceptor drum 10 and exposure unit 12 are concentrically attached with the bearings 57 and 61, a gap between them is highly accurately kept.</p> |
