| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tube tightening structure with a tube having a short straight portion at the insertion end, preventing the tube and a sealing member from coming off of a tightening member. <P>SOLUTION: The tightening member 10 has a first cylinder part 11 and a second cylinder part 21. The first cylinder part consists of a connection cylinder portion 12 having engagement holes 16 on one end side at plural peripheral places, a circular flange portion 12 protruded from the other end inward to the radial direction, an inside cylinder portion 14 coaxially extending from the protruded end thereof to one end side and an inner cylinder member 15 isolated from the inside cylinder portion in the axial direction. An O-ring 18 is coaxially arranged between the inside cylinder portion and the inner cylinder member. A large-diameter portion 32 and a small- diameter portion 33 of a connection member 30 are put on a large-diameter end portion 42 and a small-diameter cylinder portion 43 of a first tube 40, respectively, and inserted and fitted into a gap between the connection cylinder portion and each of the inside cylinder portion and the inner cylinder member. A second tube 47 is locked and held in the second cylinder part. The inner periphery face of the first tube and the outer periphery face of the second tube are liquid-tightly sealed together with the O-ring. <P>COPYRIGHT: (C)2004,JPO |
