| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pipe bending auxiliary tool capable of preventing occurrence of wrinkles on the inner side when bending a cylindrical pipe, and holding of a pipe bending member on the inner side of bending, improving the friction with a pipe inner surface during the bending work, and smoothly peeling a cylindrical elastic material from an inner surface of the bent pipe. Ž<P>SOLUTION: The pipe bending auxiliary tool inserts a cylindrical elastic material 1, which is expandable and contractible in the radial direction, into the inner surface of a pipe to be bent, and inflates the material so as to be tightly attached thereto. Any abrasion damage caused by the friction between the cylindrical elastic material and the inner wall of the pipe which are tightly attached to each other by bending the pipe can be reduced. After bending the pipe, the cylindrical elastic material is contracted, a supporting rod 6 connected to a flexible member 5 is axially moved to move the cylindrical elastic body 1 in the axial direction, and the cylindrical elastic material 1 is smoothly peeled from the inner surface of the bent pipe. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
