| 摘要 |
PROBLEM TO BE SOLVED: To suppress the damage of a liner part and a seal member which is arranged at a valve even if burrs and steps exist at a terminal end of the liner part which covers an internal periphery of a mouthpiece into which the valve is inserted.SOLUTION: An inside diameter part of a mouthpiece has a first inside diameter part, and a second inside diameter part which is located at a depth side rather than the first inside diameter part in a valve insertion direction, and seals the hollow inside of a liner part from the outside by the contact of a seal member arranged at a valve with an internal peripheral liner part which covers the inside diameter part of the mouthpiece. When viewing the internal peripheral liner part from a vertical direction with respect to an axial direction of a tank, the internal peripheral liner part has an end on the first inside diameter part. A diameter of an internal peripheral face of the first inside diameter part is formed larger than a diameter of an internal peripheral face of the second inside diameter part so that a diameter of an internal peripheral face of the internal peripheral liner part covering the first inside diameter part becomes larger than a diameter of the internal peripheral face of the internal peripheral liner part covering the second inside diameter part.SELECTED DRAWING: Figure 2 |
