IMPLEMENT FOR FORMING THROUGH HOLE OF REINFORCED CONCRETE STRUCTURE, ITS CORE AND METHOD FOR FORMING THROUGH HOLE

摘要

PROBLEM TO BE SOLVED: To provide a technology for forming a through hole capable of forming the hole without interference of a separator even in the case of mounting the separator at a desired through hole forming position between forms. SOLUTION: The core 1 formed in a sleeve is formed in a hollow cylindrical shape having a frame 2 and a pair of covers 3 for closing an opening end of the frame 2. Dividing nicks 2b, 3b for dividing the core 1 into a plurality of blocks are formed at least one position of the frame 2 and the covers 3 in a radial direction from a mounting hole 3a of each cover 3. The each cover 3 has an opening forming piece 3c for forming an opening of a size capable of inserting the separator bent into the frame 2 and mounted at least between the frames.