SEPARATION PREVENTING JOINT

摘要

PROBLEM TO BE SOLVED: To form a spigot protrusion capable of having a function for avoiding separation without special working on an outer surface of a spigot. SOLUTION: This separation preventing joint is formed by providing a lock ring 3 on an inner surface of a socket 1 of a pipe on one side, and a protrusion for avoiding removal by engaging with the lock ring 3 in removing formed on an outer surface of the spigot 4 of a pipe on other side inserted in the socket 1. The protrusion on the outer surface of the spigot 4 serves as a projection 5a formed by deforming a pipe wall from an inner surface side of the spigot 4 to an outer side of a diameter direction.