| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a structure of a connection part wherein an insert is swivel with respect to a socket so as to arbitrarily change or set a connection angle and a pile such as dust, dirt hardly collects at the connection part. SOLUTION: There is provided a socket 3 which is has a diameter-expanding shape and is formed at one end of a pipe 1 so that an insert part 4' or an end of the other pipe 1' is inserted so as to connect the pipes with each other. An axis CR of the socket 3 into which the insert part 4' is inserted is eccentrically located above a center line CL of a pipe body 2. Respective inner bottom surfaces 3a, 2a of the socket 3 and the pipe body 2 are formed continuously and substantially flush with each other. An inner diameter at the socket 3 in a position of a water stop ring 6 to be mounted at an inner periphery of the socket 3 is formed substantially the same as an outer diameter of the insert part 4', and an inner diameter length perpendicular to and from the inner bottom surface 3a is formed substantially the same as an outer diameter length of the insert part 4'. An inner diameter which is in the horizontal direction beyond the mount position of the water stop ring 6 of the socket 3 and on an end side of the pipe is formed expandedly.</p> |
