CORE MINING APPARATUS AND CORE SHAPING TUBE

PROBLEM TO BE SOLVED: To provide a core mining technology for mining a core column that has nice-looking and a shape near the natural condition, and accommodating the core column after mining in a state of easily being taken out of a tube. SOLUTION: This core mining apparatus includes: a cylindrical core bit 3; core picking parts 5, 3e mounted at the tip of the core bit 3 to pick a core column with a fixed diameter from an earth crust; and a core shaping part 4e rotatably disposed adjacent to the core picking parts 5, 3e on the core bit 3, thereby shaping the core column picked by the core bit 3 to have a fixed diameter by passing the core column through the inside of a cylinder having a cylindrical inner wall. Thus, the core column is shaped to have a fixed diameter by passing through the inside of the cylinder of the core shaping part 4e, and thereby the obtained core column is prevented from being broken due to natural expansion to obtain the core column having nice-looking and a shape near the natural condition. COPYRIGHT: (C)2004,JPO