| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling bucket for an earth drill machine which can always maintain perpendicularity of a drilling hole by a simple stabilizer structure and exerts no influence on removal and the total weight of excavated earth and sand. SOLUTION: The drilling bucket 1 is attached to the lower end of a kelly bar 6 through a pin 7. A stabilizer 9 of which the outer periphery has an external diameter size almost the same as that of the drilling bucket 1 is attached to the upper part of the drilling bucket 1 through a plurality of mounting legs 9a. COPYRIGHT: (C)2009,JPO&INPIT
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