AGITATING BLADE HAVING CHANGEABLE AGITATING DIAMETER

摘要

PROBLEM TO BE SOLVED: To provide an agitating blade having a changeable agitating diameter adjustable to an agitating diameter corresponding to the diameter of a pile to be constructed.SOLUTION: The base end of one agitating blade is swingably supported on brackets projecting from the outer peripheral surface of a rod so that the agitating diameter can be changed over from the maximum opening position where the blade extends from the outer peripheral surface of the rod outward to the closed position where the blade is retracted to the outer peripheral surface side of the rod. The agitating blade includes a lock means for disengageably locking the base end of the agitating blade to the brackets at positions where the blade is swung to a plurality of types of agitating diameters corresponding to the diameters of a plurality of types of piles to be constructed.