| 摘要 |
PROBLEM TO BE SOLVED: To carry out the sealing connecting work of a bellows tube to a coupling main body in a good efficiency and simply, while maintaining a desired high sealing performance in a good condition. SOLUTION: This tube fitting is composed to buckle and deform the front end side part 1A of a bellows tube 1 positioned between an annular seal member 3 and a pressurizing sleeve 4, following the screwing operation of a screw member 5 to the fastening side, to the screw part 2b of a coupling main body A. It is provided with an interval regulating means B which regulates the opposing interval between the pressurizing sleeve 4 and the annular seal member 3 in the tube axial core X direction, to an interval L almost equal to the length of the front end side part 1A of the bellows tube 1 before the buckling and the deformation, and releases the interval regulation following the screwing operation of the screw member 5 to the fastening side; and an insertion permitting means C to permit the insertion movement of the bellows tube 1 to the engaging part 4a of the pressurizing sleeve 4 fitted to the tube connecting hole 2. |
