| 摘要 |
PROBLEM TO BE SOLVED: To provide a lifting floor easily operable, automatable, formed simple without being complicated, and easily installable in an existing water tank. SOLUTION: This lifting floor 10 for a water tank comprises a plate part 1 installable parallel with the level of water in the water tank P and forming the movable bottom face of the water tank by its upper surface, a buoyancy changeable float part installed on the plate part 1 and capable of lifting the plate part in the water in the water tank by increasing or decreasing the buoyancy due to the change of the capacity of a gas stored therein, and a rotation support bar 3 having a gas storage part capable of increasing or decreasing the buoyancy due to the change of the capacity of the gas stored therein, rotatably connected, at one end part, to the lower surface 12 of the plate part or the bottom face B of the water tank and rotatable by increasing and decreasing the buoyancy of the gas storage chamber. COPYRIGHT: (C)2007,JPO&INPIT
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