DRILLING CENTERING FIXTURE AND DRILLING METHOD USING THE SAME

PROBLEM TO BE SOLVED: To drill an achor bolt embedding hole by centering the same in the fixing hole of a PC panel in repairing existing concrete in order to attach the PC panel to the surface of existing concrete. SOLUTION: A male screw 14 is formed to the outer periphery of a cylindrical main body part 13 and the main body part 13 is formed into a two-split shape of an upper half part 15 and a lower half part 16 both of which have a semicircular cross section and slide control means (stepped parts B, B and C, C) are provided to the joining surfaces A and A of the upper and lower half parts 15 and 16. Projected parts 17 and 18 are provided to both lower end parts of the outer periphery of the upper half part 15 and projected parts 19 and 20 are further provided to both upper end parts of the outer periphery of the lower half part 16 confronting the projected parts 17 and 18 to provide the drilling centering fixture 12 wherein the mutually confronting projected parts 17, 19 and 18, 20 are made freely fixable. COPYRIGHT: (C)2003,JPO