Patent ID: 8826627

Claim:
A joint method for a reinforcing bar comprising the steps of: providing an elongated reinforcement joint which is surrounded by a side wall, the side wall being formed as a cylindrical body with openings at opposite ends thereof, the side wall having a grout inlet provided at one of the ends and an outlet provided at the other of the ends; when the grout inlet is a protruding opening protruding outward, fitting the protruding opening with a cylindrical sealing body constituted of an elastic body including a check valve provided at one end of the sealing body; when the grout outlet is a protruding opening protruding outward, fitting a sealing plug in the protruding opening directly or through an extending pipe, the sealing plug including a plug body constituted of an elastic body having a through hole at the center, a shaft body movably inserted into the through hole, and a piston body including a pressure receiver protruding from the plug body and located adjacent the reinforcement joint and a retaining end protruding from the plug body and spaced from the reinforcement joint; inserting reinforcing bars into an inside space of the cylindrical body from both ends thereof until the reinforcing bars reach an abutment position or a proximal position; forcibly pressing the shaft body in the through hole of the sealing plug from outside to inside and positioning the shaft body so that the pressure receiver located at a front end of the shaft body protrudes towards the cylindrical body and so that the inside space of the cylindrical body and the through hole communicate with each other; mounting a grout insertion end of a tube body connected to a grout supply to the sealing body fitted in the grout inlet and injecting grout into the inside space of the cylindrical body, or into a gap located between the inside space and a member or a structure and communicating with the inside space, by pump pressure; flowing paste components of the grout in the through hole through a communicating portion located between the pressure receiver protruding toward the cylindrical body and the inside space of the cylindrical body and filling the inside of the through hole; and stopping the injection of the grout once the pressure receiver is pushed outward by pressure of the grout located in the inside space of the cylindrical body and the retaining end of the shaft body protrudingly moves outward to a predetermined position.