LOOSENING PREVENTION POLE ANCHOR STRUCTURE USING DOUBLE HELICAL STRUCTURE

摘要

The present invention relates to a loosening prevention pole anchor structure using a double helical structure including an anchor bolt in which one side is embedded in concrete and the other side is exposed to the outside and a screw is formed on the outer side; a plate penetrating the anchor bo a nut fastened to the screw of the anchor bolt to fix the plate; and a protective cap including an insertion portion for insertion of the anchor bolt and the nut, wherein the screw of the anchor bolt has a first screw formed on the concrete side and a second screw formed on the opposite side of the concrete, smaller in diameter than the first screw, and opposite in direction to the first screw and the nut includes a first nut fastened to the first screw, thereby preventing the protective cap from coming off. According to the present invention, the screw of the anchor bolt includes the first screw and the second screw opposite in direction to the first screw and the first nut is fastened to the first screw and the protective cap is fastened for nut loosening prevention. The first nut insertion portion in the protective cap insertion portion has a polygonal shape, and thus the first nut can be inserted at various angles and the first nut can be firmly and suitably fastened to the first nut insertion portion. The second screw insertion portion formed by a plurality of ribs is smaller in diameter than the second screw, and thus firm coupling can be performed during hitting-based protective cap insertion by the ribs being inserted while accommodating the second screw while being partially crushed.;COPYRIGHT KIPO 2018