| 摘要 |
<p>[Problem] To reduce the wear on a sealing member that seals the interval between a female joint and a male joint. [Solution] An end surface-sealing member is arranged in an annular step section within a through hole in a ball valve that is rotatably supported in a casing member around a central axis of rotation, and the front end surface of a male joint that is inserted in the through hole presses the end surface-sealing member. When a female joint is inserted in the through hole, rotates around the central axis of rotation along a slot opening in the casing member, and is placed in a mounting position for the female joint, engaging edges on both sides of the slot opening that engage with the female joint slide into engagement with the female joint, and press the female joint gradually in the direction of the end surface-sealing member. When the female joint is in the mounting position, the front edge surface of the female joint presses the end surface-sealing member toward the annular step section so that the interval between the ball valve and the male joint is sealed in an engaged manner.</p> |
