PIPE FITTING AND HOSE

摘要

A small pipe fitting in which a male body and a female body cannot be separated after they are coupled once. The pipe fitting (10) consists of a male body (12), and a female body (30) into which the male body (12) is inserted. The male body (12) has a smaller outside diameter on the distal end side and includes, sequentially from the distal end, a third cylindrical portion (14), an outer tapered portion (16), a second cylindrical portion (18), an annular groove (20) locked with a resilient stop ring body (42), and a first cylindrical portion (22). The female body (30) has a smaller inside diameter on the rear side and includes, sequentially from the distal end and from the inlet side of an opening (32), a first inner wall face (34), a two-step groove (40) consisting of a locking groove (36) and a containing groove (38) and containing the resilient stop ring body (42), a second inner wall face (44), an inner tapered portion (46), and a third inner wall face (48). The resilient stop ring body (42) has a gap (43) formed by cutting a part of an annular member, wherein the outer circumferential diameter when the resilient stop ring body (42) is deformed resiliently to allow the end faces (42A, 42B) of the gap (43) to touch each other is set smaller than the inside diameter of the first inner wall face (34).