| 摘要 |
<p>PURPOSE:To obtain an air raging method for a reservoir roof without any need of a positional correction by forming a roof guide via at least three rollers so fitted on the roof as to enclose an air supply pipe. CONSTITUTION:Support brackets 1 of axes 10 are so fitted to the lower side of a roof 4 as to enclose an opening A. Rollers 9 are fitted to the axes 10 with both ends thereof supported on the brackets 11 via a bearing, and so arranged as to give a slight clearance between the drums thereof and an air supply pipe 6. When air is supplied via the pipe 6 and the roof 4 is made afloat with the pipe 6 as a guide cylinder, the rollers 9 so arranged as to enclose the pipe 6 with the slight clearance keep the displacement of the roof 4 at a small amount, thereby enabling the easy application of weld to an external support part 5.</p> |
