| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe connecting device of a type using an inner ring, improved to be repeatedly used many times in comparison with a conventional one, while keeping good sealing performance by further reviewing a structure.SOLUTION: A pipe connecting device includes an inner ring 3 having an outer peripheral portion 3G including a tapered outer peripheral expanded face 3a to expand a tube end portion 4C, on its tip, a pipe joint body 1 having a cylindrical screwing portion 1A with a male screw 7, and a union nut 2 having a female screw 13, the inner ring 3 expands the tube end portion 4C and is inserted into the cylindrical screwing portion 1A, and the tapered outer peripheral expanded face 3a is pressed while holding a tube 4 by the union nut 2 engaged with the cylindrical screwing portion 1A to be advanced. A tube pressing portion 12b pressing the tube 4 with the tapered outer peripheral expanded face 3a of the union nut 2 is formed into an inclined inner peripheral face inclined in the direction same as the outer peripheral expanded face 3a with respect to a shaft center Y of the cylindrical screwing portion 1A. |
