Conduit pipe, closed conduit pipe connecting structure, bell block, for connecting conduit pipe method, be used for connecting conduit pipe and bell block, the method for pipe fitting and ring element

摘要

It is one ring element-position portion 11 by the region that a pair of locking walls 9 sandwiches. Ring element-position portion 11 is configured, in order from 3 tip side of tube body, from the part of a major diameter 13, and an angular surface portion 15 and a tubule path portion 17. One ring element 5 is positioned in ring element-position portion 11. Ring element 5 essentially forms a C shapes, wherein the one section in circumferencial direction is open in an open section 19. One end-section side of ring element 5 is that the diameter section 21 of the reduction with a smaller diameter is done than other parts. Multiple tines 23 are provided, using the other end-section side of ring element 5 as direction. From have each other a distance in the circumferencial direction with intervenient crack 25 on the diameter section 21 of reduction provide tine 23. By its outer diameter be gradually toward top in a direction from the diameter section of reduction 21 it is increased in a manner of 23 increase in diameter of tine.