HOLLOW PILE ROTARY PRESS-IN WORK EXECUTION DEVICE

摘要

PROBLEM TO BE SOLVED: To improve the efficiency of a device and to reduce the cost by applying a rotation torque of an auger rotation drive unit to a hollow pile rotation drive unit only in embedment. SOLUTION: A cylindrical body 8 is connected to the auger drive shaft 4a of the auger rotation drive unit 4 and an engagement projection 10a engaged with an engagement projection 8a of the cylindrical body when pulling up an auger screw 7, is provided in the internal circumference of a hollow pile 10 to be connected to a hollow pile drive shaft 5a of the hollow pile rotation drive unit 5.