| 摘要 |
PURPOSE:To obtain the subject lid structure for floating on the water surface and keeping water warm during the suspension of a pool by swinging a swingable heat insulating lid with feed and discharge of a pressure gas. CONSTITUTION:Bag units 1 and 1' which are heat insulating lids are mounted on sidewalls 2 and 2' of a pool with hinges 3 and 3' and kept in a sunk state along the sidewalls during use of the pool. In suspension of the pool, water, etc., are jetted form nozzles 7 and compressed air is injected into the interiors of te bag units while urging the bag units in the direction to separate from the sidewalls. Thereby, the bag units are swung to the water surface (W). |
