| 摘要 |
A pipe coupling device has a main body defining a main body passage hole to permit communication between inside the main body passage hole and outside the main body passage hole. A fixing screw member is joined to the main body to surround a periphery of the main body passage hole, the fixing screw member having an external thread formed in its outer peripheral surface. A sleeve is insertable in the fixing screw member while a tilt preventing gap is defined between the sleeve and an inner peripheral surface of the fixing screw member. A first convergently tapered portion formed at a tip end of the pipe is pressed against a first pressure bearing surface formed at one end of the sleeve to form a first seal. A second convergently tapered portion formed at the other end of the sleeve forms a second seal.
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