| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the noise when the water flows in a piping by forming an inner layer including a water flowing surface of a joint body with an elastic resin having a specific hardness, and making the flowing water surface flush with the flowing water surface of a pipe to be joined. SOLUTION: The total layers of the acceptors 12, 12 and an outer layer of a joint body 11 are made of a synthetic resin 1B, and an inner layer including the water surface of the joint body 11 is made of an elastic resin 1A having the hardness at most 80. A thickness t1 of a part made of the elastic resin 1A is equalized to a thickness of a synthetic resin pipe 2, and the flowing water surface in the joint body 11 is flush with the flowing water surface in the inserted synthetic resin pipe 2. The piping is performed by connecting the synthetic resin pipes 2, 2 to the acceptors 12, 12 at both ends of a union joint 1. When the fluid flows down in the piping, the inner layer including the water surface of the joint body 11 made of the elastic resin 1B having the hardness at most 80, absorbs the impact generated in the flowing of the fluid, whereby the noise can be reduced.</p> |
