| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a hollow needle pushes and breaks a sealing plate by an annular face, an initial unsealing load becomes large because a tip of the needle assumes a shape cut by an axial line and a perpendicular face when puncturing the seal plate of a high pressure container by the hollow needle, or when an axial line of the needle is arranged on the same line as the axial line of the gas container in the case of making the tip of the needle an inclined face for reducing the initial unsealing load, the tip is decentered from the axial line on the perpendicular face, and cut in the thinnest part of a wall thickness of the seal plate can not be carried out.SOLUTION: In an unsealing body of a high pressure gas container, a puncturing needle (14) having an oblique end part (13) from and end face (12) of a piston part (11) protrudes parallel to an axial line (15) of the piston part (11), decentered from the axial line (15), and with the tip (16) positioned on the axial line (15). |
