| 摘要 |
PROBLEM TO BE SOLVED: To make welding work simple and easy, to shorten welding work time and to prevent deformation during welding work. SOLUTION: The casing is provided with a top plate (a first plate) 2 having a first end 1 of a L shaped section, and a side plate (a second plate) 5 having a second end 6 which is lapped with a flat plate part 4 of a free end 3 side being a component of the first end of the L shaped section. At a lapped part 7, plural penetrated holes 8 are formed at the second end 6 located at the inside. The top plate 2 and the side plate 5 are joined by lapping the flat plate part 4 and the second end 6 and spot welding with the plural penetrated holes 8 utilized. |
