| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting structure which can maintain a pressure force to an O-ring, in the connecting structure which threads an end part of pressure piping.SOLUTION: A tip-narrowed male tapered face 21 is formed at an end part of pressure piping 2 which makes pressurized fluid flow to the inside, and a male screw 23 is arranged at an external peripheral face continuing to the male tapered face 21. At a joint 1, there are formed a cylinder hollow part 10 formed with a female screw 11 into which the male screw 23 of the pressure piping 2 is screwed, a female tapered face 14 whose hollow inside diameter is contracted following the female screw 11, and has the same tapered angle as that of the male tapered face 21 of the pressure piping 2, and an O-ring groove 15 which accommodates an O-ring 3 arranged in the middle of the female tapered face 14, or at one end of the female tapered face. The O-ring 3 is accommodated in the O-ring groove 15, and compressed between the male tapered face 21 of the pressure piping 2 and the O-ring groove 15. |
