| 摘要 |
PROBLEM TO BE SOLVED: To easily and surely attach and detach a cover body in a plug device for mechanically opening and closing a pipe opening or a hole.SOLUTION: An operating section 5 to which a cover body 6 for opening and closing a drain outlet includes a tubular member 52 and a strut 51 which moves up and down inside of the tubular member in accordance with action of a release wire 3. A magnet 53 is mounted on the top of the strut 51. A magnet 63 is adhered to a rear face of the cover body 6, and the cover body 6 is adhered to the strut 51 by a magnetic force. A cylindrical projection 64 is provided on the rear face, and the projection 64 is fitted into the outer circumference of a hold member 9, such that a position of the cover body 6 in a radial direction is regulated and a positional relation between the strut 51 and the cover body 6 is also regulated as a result. Thus, the cover body 6 is adhered to the strut 51 by the magnetic force, such that the cover body 6 is easily attached and detached and trouble such as a rupture in detachment or leakage with a defect in mounting can also be suppressed. |
