REINFORCING ROD A COUPLING DEVICE FOR HOOPED REINFORCEMENT

摘要

The present invention relates to a rebar coupler for a spiral bar to couple a pair of spiral bars on a line. A protrusion receiving groove screwed with a spiral protrusion of the spiral bar is formed inside the rebar coupler, and the protrusion receiving groove has a spiral orbit of which both sides are different from each other based on a center. Moreover, the protrusion receiving groove has a different spiral point on both end parts of the rebar.