LONG DRILLING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a long drilling apparatus which carries out drilling by an extension type guide cell, wherein the long drilling apparatus can be loaded on a drill jambo without requiring a separate driving source. SOLUTION: The long drilling apparatus is formed of: an outer tube 22 mounted on the tip of a boom 12 of the drill jambo 11; an extension cylinder 21 extendable/contractible upon feeding/discharging of hydraulic oil from the drill jambo 11; an inner tube 23 mounted in the cylinder 21; a guide rail 31 mounted on the tube 23; the guide cell 32 mounted on the guide rail 31 in a manner movable forward and backward along the same; a drifter 33 mounted on the guide cell 32 in a manner movable forward and backward along the same; coaxial double pulleys 42 (45) arranged on the tip of the inner tube 23; a fulcrum pulley 41 arranged on the outer tube 22; and a wire 43 extended between the outer tube 22 and the guide cell 32 and wrap-connected to the double pulleys 42 (45) and the fulcrum pulley 41 to form four-folded connection. COPYRIGHT: (C)2008,JPO&INPIT