Reinforcement bar coupler

Abstract

A reinforcement bar coupler, in which a female thread having an inclined taper plane is formed on the inner surface of a coupler cap, and a clamping spring is inserted into and fastened to the female thread. When a reinforcement bar is inserted into the clamping spring, the clamping spring is closely abutted to the bottom of the female thread and is increased in diameter so that the reinforcement bar slips. With the reinforcement bar being inserted, when an external force is applied in the direction opposite to the direction in which the reinforcement bar is inserted, the clamping spring moves along the inclined taper plane and is decreased in diameter, thereby holding the reinforcement bar. It is therefore possible to easily connect and couple the reinforcement bar with one touch based on a change in the diameter of the clamping spring using a relatively simple configuration.

Description

CROSS REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY[0001]This patent application is a National Phase application under 35 U.S.C. §371 of International Application No. PCT / KR2011 / 008203, filed Oct. 31, 2011, which claims priority to Korean Patent Application Nos. 10-2010-0109388 filed Nov. 4, 2010, and 10-2011-0007910 filed Jan. 26, 2011, entire contents of which are incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a reinforcement bar coupler.[0004]2. Background Art[0005]In general, a reinforcement bar is used a manner in which it is buried inside concrete when constructing a steel-reinforced concrete structure in order to reinforce the strength of the concrete structure. In particular, a large number of reinforcement bars are used for reinforcement in large buildings, special structures, and engineering work structures such as bridges.[0006]However, since reinforcement bars are manufactured to be standardized regular...

AI Technical Summary

Benefits of technology

The present invention provides a reinforcement bar coupler that allows for easy and secure coupling of reinforcement bars with one touch. The coupler includes a female thread with an inclined taper plane and a clamping spring that is inserted into and fastened to the female thread. When a reinforcement bar is inserted into the clamping spring, the clamping spring moves along the inclined taper plane and is decreased in diameter, thereby holding the reinforcement bar. The one-touch connecting means prevents interference with the insertion of the reinforcement bar and allows the clamping spring to hold the reinforcement bar when the insertion is completed. The coupler is easy to manufacture and can securely fix the reinforcement bar based on the sliding movement of the clamping spring and the thrust of the angled end portions into the reinforcement bar.

Problems solved by technology

A large portion of the reinforcement bars are lost, and the reinforcement bars are easily detached due to the weak strength of jointed portions.

Also, a working time is increased due to poor constructability, which is problematic.

The welding has problems in that construction is difficult and the strength of the portions of the reinforcement bars adjacent to the welded portions is remarkably weakened because of the heat generated when the welded portions are heated.

Accordingly, a long time and a large cost are spent on construction.

However, this approach of the related art has a significant drawback in that ends of the reinforcement bars 100″, which are manufactured at standardized sizes, must be machined before use in order to form the connecting portions 101″.

In addition, the coupler members 11″ and 21″, the coupler connecting pins 30″, the rubber bands 40″ and the like must be individually and manually fastened to the reinforcement bars 100″, thereby leading to the problems of increased construction time and cost.

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