| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure capable of surely preventing leakage of filled gas from a gap between a nozzle part of a high-pressure gas container and an accessory such as a connection pipe connected to the nozzle part.SOLUTION: The seal structure includes: a metal block 20 comprising a first truncated conical part 22, a column part 21 and a second truncated conical part 23 and having a through hole 24 on an axial center; and first and second rubber O-rings 25, 26 mounted around the column part 21 near the first truncated conical part 22 and near the second truncated conical part 23 respectively. A first recess 30 comprising an area of a tapered surface 31 and an area of a cylindrical surface 32 is formed on a nozzle part 4, a second recess 40 comprising an area of a tapered surface 41 and an area of a cylindrical surface 42 is formed on a connection pipe 5, the block 20 is stored in the first and second recesses 30, 40, the connection pipe 5 is pressed to the nozzle part 4, respective outer peripheral surfaces of the first and second truncated conical parts 22, 23 are brought into pressure-contact with the tapered surfaces 31, 41, and the respective first and second O-rings 25, 26 are brought into contact with the cylindrical surfaces 32, 42. |
