| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a universal bending joint for a multiple perforation pipeline with almost no possibility of being damaged, even if the pipeline is buried shallow and receives an impact from a pickaxe, freely bending in any of the three-dimensional directions and superior in workability. <P>SOLUTION: In the universal bending joint for the multiple perforation pipeline, a pair of joint members 2, 2 are loosely inserted from openings 1d, 1d at both ends of an outer frame 1, engaging flanges 2a, 2a are provided at their tips and loosely fitted into a pair of engaged grooves 1e, 1e on the inner face of the outer frame 1 so as not to come off, both ends of short pipes 3 disposed between the tips of the jointing members 2, 2 are loosely inserted into penetration holes 2b, 2b (openings 2d, 2d for receiving the tips) of the jointing members 2, 2. Both jointing members 2, 2 are bent to any one of the three-dimensional direction within a range of a play between the opening 1d and the jointing member 2, a play between the engaged groove 1e and the engagement flange 2a, and a play between the penetration holes 2b (the opening 2d for receiving the tip) and both ends of the short pipe 3. The short pipes 3 are protected by the outer frame 1, and hardly damaged by the pickaxe. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
