THREADED REINFORCING BAR COUPLING FOR DEFORMED REINFORCING BAR, AND THREADED DEFORMED REINFORCING BAR

摘要

A threaded reinforcing bar coupling for a deformed reinforcing bar according to the present invention connects a pair of reinforcing bars (1, 1), which are deformed reinforcing bars, with male threaded portions (1c) provided at end portions of the reinforcing bars and a threaded cylinder (2). In each reinforcing bar (1), by roll forming on an iron wire rod which is a raw material, a projection (1b) on an outer peripheral surface is formed and a diameter enlarged portion which is larger in diameter than another portion is formed in a portion in a longitudinal direction. An outer diameter of the diameter enlarged portion is not larger than a reinforcing bar outermost diameter (D1) including the projection (1a) of the reinforcing bar (1). The male threaded portion (1c) is formed in the diameter enlarged portion by rolling.

主权项

1. A threaded reinforcing bar coupling for a deformed reinforcing bar, the threaded reinforcing bar coupling connecting a pair of reinforcing bars, wherein
a male threaded portion is provided at each of opposed end portions of the pair of reinforcing bars to be connected to each other, a threaded cylinder is provided so as to be screwed onto the male threaded portions of both reinforcing bars, at least one reinforcing bar of the pair of reinforcing bars is a deformed reinforcing bar including a projection on an outer peripheral surface of a reinforcing bar main body, and in the at least one reinforcing bar which is the deformed reinforcing bar, the projection on the outer peripheral surface is formed and a diameter enlarged portion which is larger in diameter than another portion is formed in a portion in a longitudinal direction by roll forming on an iron wire rod which is a raw material, an outer diameter of the diameter enlarged portion is not larger than a reinforcing bar outermost diameter including the projection of the reinforcing bar, and the male threaded portion is formed in the diameter enlarged portion by rolling.