| 摘要 |
PROBLEM TO BE SOLVED: To provide a movable_floor pool which is equipped with an underfloor entry preventing mechanism that is set so as to minimize a distance between a movable floor in a lowest position and the bottom surface of a pool tank. SOLUTION: The movable_floor pool is formed of a pool tank (1), a movable floor (2) vertically movably arranged above the bottom surface (1a) of the pool tank (1), a bearing frame (3) connected to the surface of the movable floor (2) facing the bottom surface (1a) of the pool tank (1), and an expandable shutter mechanism (4) having one edge thereof connected to the movable floor (2) and the other edge connected to the bottom surface (1a) of the pool tank (1). A portion of the shutter mechanism (4) that contributes to blocking a gap between the movable floor (2) and the bottom surface (1a) of the pool tank (1) is contractible to a length shorter than the vertical height of the bearing frame (3). COPYRIGHT: (C)2004,JPO
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