| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting structure of a tube, wherein a gap between a cap nut member and a tube member is substantially equivalent to that in the case that there is no circular groove on a gap section, in the connecting structure of a tube where a circular groove is arranged on the gap section between a round opening of the cap nut member and the tube member. SOLUTION: In the connecting structure of a tube comprising a connection section 1 having a connecting section 2, the tube member 3 inserted into the inside of the connection section 1, and a connected section 5 engaged with the connecting section 2 of the connection section 1 and provided with the cap nut member 4 with the round opening 6 for inserting the tube member 3 and a circular packing 7, the circular groove 9 is arranged on the tube member 3, and a circular circular-packing section 10 to be arranged between a peripheral edge of the round opening 6 of the cap nut member 4 and the circular groove 9 of the tube member 3 is protruded into the round opening of the cap nut member 4 at the time of use. COPYRIGHT: (C)2009,JPO&INPIT
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