| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an opening/closing device of a waterproof door which quickly opens and closes the waterproof door without depending on a large-capacity power supply when the waterproof door for opening and closing an entrance of a waterproof wall descends and is closed.SOLUTION: An opening/closing device of a waterproof door comprises: a door-closing tank 102 arranged at the waterproof door 101; a counter weight 201 having weight balanced with the door-closing tank 102; a stop tank 202 arranged at the counter weight; a wire 40 for suspending the door-closing tank 102 at one end, and suspending the counter weight 201 at the other end; and a liquid storage tank 30 for storing water. Water in the liquid storage tank 30 is supplied into the door-closing tank 102 by a plurality of door-closing tubes 110, and supplied into the stop tank 202 by the stop tubes 210. Opening/closing valves 120, 220 are connected to the respective tubes 110, 210.</p> |
