PROBLEM TO BE SOLVED: To simplify the structure of the whole of an elevating device for movable floor type pool, and to facilitate the maintenance of various equipment. ;SOLUTION: This elevating device for movable floor type pool is provided with plural hydraulic cylinders 3 for supporting a movable floor 5 in a bottom part 2 of a pool 1, hydraulic pumps 13 arranged inside of a control chamber and connected to each hydraulic cylinder 3 through hydraulic pipelines 8, 12, and pump driving motors 14. Each pipeline 12 inside of the control chamber is provided with a main opening and closing valve 17, a return branch pipe 27 having a throttle 22, a capacity measurer 35, and a return opening and closing valve 19. The movable floor 5 is elevated by the changeover operation of the opening and closing valves 17, 19 and the rotation of the motor, and during the elevation, a capacity measured value, which is measured by the capacity measurer 35, is input to a control board 38, and the number of revolution of each motor 14 is controlled so that each hydraulic cylinder 3 is synchronously elevated at the predetermined speed.;COPYRIGHT: (C)1997,JPO
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