| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve resistance for earthquake at a branch portion of a piping by integrally forming a saddle fixed around a distribution pipe and a casing of a ferrule body performing a divisional function, and preventing dislocation of a ferrule in an axial direction of the distribution pipe. SOLUTION: A water extraction hole 2a communicated with a hole 1a of a distribution pipe 1 is formed on a saddle 2. A peripheral portion of the water extraction hole 2a is integrated with a casing 7a of a valve 7 of a snap tap body 11 by casting. Height of a snap tap 3 can be suppressed, for instance to two thirds of conventional one. A reflection area of a part of the snap tap 3 to which mud pressure is applied is reduced by suppressing the height of the snap tap 3 when relative displacement is generated between ground and the water piping 1 in an axial direction of the pipe at the time of earthquake. The snap tap 3 is not largely influenced by the pressure of the ground. Axial dislocation hardly occurs between the snap tap 3 and the distribution pipe 1, improving resistance to earthquake at a branch portion of the pipe line.</p> |
