| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a piping structure as well as to impart flexibility to a pipe coupling by providing ring bodies to be mounted in spaces formed between the inner peripheral surface of a casing and the spherical expansion parts of a bend so that it may be freely attached and detached, and in which the spherical parts capable of being freely slid on the spherical expansion parts of the bend are formed on the inner peripheral surfaces. SOLUTION: In a bend 1, spherical expansion parts 2 are expanded and formed on both ends. In a pair of coupling main bodies 3, spherical recessed parts 4 to be fitted around the spherical expansion parts 2 of the bend 1 so as to be freely slid are formed on the inner peripheral surfaces. In spaces 13 formed between the outer peripheral surfaces of the spherical expansion parts 2 of the bend 1 and the inner peripheral surfaces of the coupling main bodies 3, a pair of ring bodies 14 formed of circular-arc pieces are mounted so as to be freely attached and detached. The outer peripheral surfaces of the ring bodies 14 are formed into such a shape as to coincide with the inner peripheral surface of a casing 8, and slidable spherical surfaces 15 slidable on the spherical expansion parts 2 of the bend 1 are formed on the inner peripheral surfaces.</p> |
