PIPE JOINT STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a pipe joint structure for easily mounting/demounting a hose to/from a pipe and simply preventing the looseness. SOLUTION: A cap nut 5 is mounted at the end of a fitting 4 in a turnable and locking manner. A locking nut 2 is threaded to a male screw 1b provided on the outer-diameter face of a pipe side joint portion 1. The cap nut 5 is threaded to the male screw 1b with a given tightening force and engaged with the locking nut 2 via tapered faces with a given tightening force when the locking nut 2 is tightened.