MOUTH PIECE STRUCTURE OF FRP HIGH PRESSURE CONTAINER

PROBLEM TO BE SOLVED: To provide a mouth piece structure of a FRP high pressure container having good sealing for easily replacing a sealing material such as an O ring by another by constructing a mouth piece metal fitting so as to be detached. SOLUTION: The mouth piece structure of a FRP high pressure container is provided with a hat-like inner side mouth piece metal fitting 1 having a through-hole 7 in its center part and a female screw 8 formed in the inner circumferential surface of the through-hole 7 and an outer side mouth piece metal fitting 2 having an outer shape formed in the two stages of large and small diameter parts 11 and 12, a male screw 13 formed in the small diameter part 12, a through-hole 14 in its center part and a connecting screw 15 formed in the inner circumferential surface of the through- hole 14 and the inner mouth piece metal fitting 1 is attached tightly so as to be wrapped in the inside of the liner 18 of a fluid outlet/inlet 4. The liner 18 and an O ring 16 are disposed between the upper ends surface of the body part 5 of the hat- like inner side mouth piece metal fitting 1 and the step part lower end surface of the large diameter part 11 of the outer side mouth piece metal fitting 2 and then the male screw 13 of the small diameter part 12 of the outer side mouth piece metal fitting 2 is engaged with the female screw 8 of the inner side mouth piece metal fitting 1.