| 摘要 |
PURPOSE:To increase the installation strength and prevent the fusion and slip-off of a cover member by the heat transmitted from a base plate by installing the cover member onto the base plate by a proper squeezing pressure. CONSTITUTION:A plurality of machine screw holes 27 are drilled on the peripheral edge part 21a of a cover member 21, and a pressing plate 25 having a plurality of boss parts 25a is installed. The boss part is fermed so that the projection quantity becomes smaller than the thickness of the cover member. The boss part is fitted into the machine screw hole, and the machine screw 23 is inserted into the boss part, and the top edge of the boss part is tightened up to the collision with a base plate 12, and fixed. |
