| 摘要 |
<p>PURPOSE: To lighten a fixed drum and prevent the fixed drum from being deformed by setting a deformation-absorbing part between a mounting means and a main body of the fixed drum and concentrating a deformation generated when the mounting means is fixed to a setting part. CONSTITUTION: A groove 82 is formed in the shape of a bow along an outer peripheral surface of a main body 22 of a fixed drum. A deformation-absorbing part 80 provided as a result of the formation of the groove 82 absorbs a deformation generated when a mounting means 20 is clamped to a fixed plate 70 by a screw 72. Therefore, the main body 22 is not influenced by the deformation at the clamping time. Thicknesses W4 and W5 of the main body 22 can be decreased, so that the fixed drum becomes light in weight.</p> |
