| 摘要 |
<p>PURPOSE: To straighten a curved vinylchloride pipe at the time of embedding this pipe for sewerage. CONSTITUTION: This is one being inserted into a curved vinylchloride pipe(VP) and embedded in a state of having its bend straightened and then extracted after the circumference is hardened, and in this bent straightener, each ball bearing 3 equipped with a rotatable ball is attached to outer four surfaces at plural spots almost extending the full length of a square pipe 1 being somewhat shorter than this vinylchloride pipe after making a distance between two apexes of the opposed balls almost equal to an inner diameter of the vinylchloride pipe(VP). In addition, a wire connector link 4 for connecting a wire rope 5 to be inserted into the pipe (VP) and/or extracted from it is installed in an end of the square pipe 1.</p> |
