Rebar movement-prevention-type one-touch coupler

A rebar movement-prevention one-touch coupler comprising:

• a pair of housing units each of which is formed in a tubular shape in which a rebar inlet hole provided at one side thereof and a socket mounting hole provided at the other side thereof are connected with each other via an inner passage, the pair of housing units being configured to have a tapered inner circumferential surface of which an inner diameter becomes smaller to the one side direction;
• a pair of piece body units each of which is provided with a plurality of piece bodies each having an expanded surface body in which an outer circumferential surface thereof becomes smaller to the one side direction and which is disposed to be in contact with the tapered inner circumferential surface, the plurality of piece bodies being inserted into and disposed in the inner passage of each of the housing units while the plurality of piece bodies is in a state of being spaced apart from each other in a circular line, and an inner side surface of each of the plurality of piece bodies being provided with a plurality of locking protrusions in a longitudinal direction thereof;
• and
• a pair of springs each of which is configured to respectively provide an elastic force in a longitudinal direction thereof to each of the piece body units by being inserted into the inner passage of each of the housing units and by being fitted to an end of each of the piece body units,
• wherein the inner side surface of each of the piece bodies is provided with a piece body ring insertion groove in a circumferential direction, and
• the rebar movement-prevention one-touch coupler further comprises:
• a piece body ring formed of an elastic material and having a major arc shape provided with an incision portion in which a predetermined section is cut and having a rectangular vertical cross-sectional shape with a height greater than twice a thickness of the piece body ring and that is the same as a width in a longitudinal direction of the piece body ring insertion groove, the piece body ring being configured to guide the expanded surface body of each of the piece bodies to be in close contact with the tapered inner circumferential surface and configured to guide the plurality of piece bodies to be positioned in place on the circular line while the plurality of piece bodies is maintaining a position in a longitudinal direction thereof to be the same with each other, and the piece body ring being fitted and fixed to the piece body ring insertion groove such that each of the piece bodies is simultaneously moved in a direction toward the rebar inlet hole, and
• both the width in the longitudinal direction and the height are set to be 3 mm to 15 mm.