| 摘要 |
PROBLEM TO BE SOLVED: To prevent a leak of the fuel by obtaining highly reliable air-tightness in the connection structure of a small-diameter pipe to be used for various piping of a vehicle, a vessel and a construction machinery and a flexible hose to each other, and to provide the connection structure having excellent air-tightness without using a lot of members. SOLUTION: In the connection structure for inserting a small-diameter metal tube 1 into a flexible hose 2 for connection, an annular projecting wall 7 is provided in the periphery of the small-diameter metal pipe 1 to be inserted into the flexible hose 2 at a tip thereof to be inserted. A seal ring member 3 is installed in the periphery of a base part of a rear end surface 6 of the annular projecting wall 7 freely to adhere the inner peripheral surface of the flexible hose 2. A resin tube 10 is adhered to the peripheral surface of the small-diameter metal tube 1, facing to the back surface of the seal ring member 3 in the rear end direction thereof. COPYRIGHT: (C)2004,JPO
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