CONNECTION STRUCTURE OF ROTARY TABLE AND CASING DRIVE ADAPTER IN EARTH DRILL

摘要

PROBLEM TO BE SOLVED: To provide a sturdy and safe mounting structure preventing a casing drive adapter mounted on a rotary table from dropping due to breakage of a bolt 11. SOLUTION: In a mounting structure of the rotary table and the casing drive adapter in an earth drill, the lower peripheral side face of a sleeve provided with a driving rib at the internal wall and a mounting bracket attached to the upper part of a flange adapter are fixed together by a plurality of fixing tools inserted in the radial direction of the sleeve. COPYRIGHT: (C)2004,JPO