| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lock by providing a simple structure in a connection structure of a line in which a socket 1 having a flange part 12 is formed at one pipe end part, a rubber ring 3 is fitted to the other connection pipe (insert part) 2 and the connection pipe is inserted into the socket 1, and the flange part 12 is connected to a retaining ring 4 with bolts and nuts 5 and 6 so that the the rubber ring 3 can be pressed by the retaining ring 4 so as to secure sealability. <P>SOLUTION: A locking projection 21 is projectedly formed on the outer periphery of the connection pipe on the insert side (insert part 2). A cutout part allowing the projection 21 to pass therethrough is formed in the retaining ring 4 at a position where the cutout part is displaced from the locking projection when the bolt holes in the flange part and the retaining ring are aligned with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
