| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a coupling superior in extraction resistant strength and a waterproof effect of a corrosion resistant lining pipe. <P>SOLUTION: Opening both end parts of a coupling body 10 are formed by overhanging in an expansive pipe state as end flanges 11 and 11. Elastic lips 20c and 20c pushed down in a large bending state by the corrosion resistant lining pipe 14 are overhung at an inward almost right angleγfrom an inlet part of waterproof rubber packing 20 and 20 integrally fixed to the end flanges 11 and 11 in an internally fitting state, and are strongly press-fitted to an outer peripheral surface of the corrosion resistant lining pipe 14 by its restoring resiliency. While, a screw shaft part 17a of corrosion resistant lining pipe pressing- down bolts 17, 17, 17, and 17 is coated with a waterproof coating film 18, and the tip of the screw shaft part 17a is sharpened as a claw 17b for biting into an element pipe (a steel pipe) 14a of the corrosion resistant lining pipe 14. <P>COPYRIGHT: (C)2003,JPO</p> |
