| 摘要 |
<p>The reflection portion 20 of the reflection member 1 is moved along the inner surface in the hole of the pipe W from the entrance opening of the hole of the pipe W to the exit opening of the hole thereof. In this case, the reflection portion 20 is guided by the guide portion 30 provided at both sides of the reflection portion 20. The shots, which are projected toward the inner surface in the hole of the pipe W, reach the reflection portion 20 through the holes of the guide portion 30 of the entrance side, and they are reflected toward the inner surface in the hole of the pipe W. Since the shots can be reflected toward the inner surface inside in the hole of the pipe W, the tendency that shots may be moved toward the inner surface outside in the hole of the curved portion P can be small. Therefore, since thinning of the wall of the pipe W can be performed, the pipe W can be strong, and the weight reduction of the pipe W can be simultaneously performed. As a result, the workability and the versatility can be improved, and the reflection member 1 can be easily used on the inner surface in the hole of the pipe having the curved portion.</p> |
