| 摘要 |
PURPOSE:To increase the welding strength on both side parts of a recess provided to the central part of surfaces to be welded and to prevent failure in the case of driving a titled bracket by hammering the driving part by providing said recess to the central part of the surfaces to be welded, bringing said surfaces into contact with each other at the ends with the recess as a center and welding the surfaces. CONSTITUTION:A recess 23 is preliminarily provided to roughly the central part of the end face of a leg part 2 of a bracket for attaching a rainwater gutter which face is to be used as the surface to be welded. Both side parts 24, 24 of the recess 23 are brought into contact with the surface to be welded on top of the base end 31 of a driving part 3. Welding is thereafter started from the parts where the surfaces to be welded are held in contact with each other then instantaneously the welding is extended to between the recess 23 and the top surface at the base end 31 of the driving part 3 as well. The surfaces to be welded are finally welded to each other over the entire surface. |
