| 摘要 |
PROBLEM TO BE SOLVED: To achieve a pile press-in device which can prevent falling of an auger casing by a simple configuration.SOLUTION: When an auger casing K, which is arranged at a height suitable for replacing operation of an auger head of an auger screw S, is held by a chuck device 15, a casing chuck part 2 is operated to fit movable claws 2a of the casing chuck part 2 into recessed parts M formed in a casing rail L of the auger casing K, whereby the vertical movement of the auger casing K is restricted to physically prevent falling of the auger casing K. |
