CONCRETE CAISSON HOISTING TOOL

PURPOSE: To simply and safely complete the hoisting preparation in a short time by fitting hoisting metals hoisting a concrete caisson via hoisting reinforcing bars movably by the prescribed distances along girders. CONSTITUTION: Four legs 26 are put on the ground, reduction gears 81 are started, the front and rear girders 21 and the right and left girders 22 are moved according to the lengths of the sides of a concrete caisson 10, and the intervals between the opposite girders are adjusted to the prescribed values. Power cylinders are expanded or shrunk to move hoisting metals 50 to the positions of hoisting reinforcing bars 11 of the concrete caisson 10. Hydraulic cylinders of hoisting accessory height adjusting devices 35 are vertically expanded or shrunk to adjust the heights of the girders. Arms 72 of the positioning guides 70 of hoisting beams 21 are reciprocated by hydraulic cylinders and positioned according to the lengths of the sides of the concrete caisson 10.