| 摘要 |
PROBLEM TO BE SOLVED: To provide a pile drawing device capable of smoothly rotating the whole casing without increasing stress applied to a connection part between an output part and the casing even when a pile is bent in the ground. SOLUTION: The pile drawing device is provided with a casing rotating means 30 liftable while being guided by a guide member, and the casing 50 with its upper end mounted to the casing rotating means 30. The casing rotating means 30 is composed of a driving means 31 for rotating the casing 50 around a shaft, and a frame member 32 liftable guided by the guide member and supporting the driving means 31. A horizontal shaft 41 of the frame member 32 is allowed to pass through mounting holes 36 of the driving means 31 to hang the driving means 31 by the frame member 32. The diameter of the mounting hole 36 is formed to be larger than the diameter of the horizontal shaft 41. COPYRIGHT: (C)2006,JPO&NCIPI
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