KR20140099414A - re-bar coupler by push and grab - Google Patents

Abstract

Provided is a wedge-shaped spring coupler. The wedge-shaped spring coupler includes: a cone-shaped tapered grip which is divided into more than two parts, has a hole with the diameter slightly smaller than that of the steel-reinforcing bar in the center and wedges arranged to be in the steel-reinforcing bar insertion direction and a reverse direction from the hole and to the surface in contact with the steel-reinforcing bar; a cyclic ring coupling the grip divided into more than two parts to a single piece; two shoes which have an internal space enabling the grip to be in contact with an end unit and another space to install a spring between the grips, and integrates female and male screws and fixing nuts to be bound to each other; and a spring which presses two grips in opposite directions in the space between the two grips in the space where the two grips are arranged in the coupled shoes.

Description

Push and grab coupler by push and grab

The present invention relates to a reinforcing coupler used for mechanical connection of a reinforcing bar, and more particularly, to a wedge-shaped spring reinforcing coupler which can be economically manufactured by making it easier to perform a mechanical reinforcing joint operation in the field.

In reinforced concrete structures, reinforcing bars play a role in resisting external forces such as tensile and shear forces, which can not be solved only by concrete, among the external forces acting on the structure. Considering the construction error, tensile force due to eccentricity also occurs in columns subjected to compressive force. For this reason, more than a certain amount of reinforcing bars must be placed in most parts of the reinforced concrete structure. It is essential that all reinforcing bars remain unified until they reach the fixing area.

However, the rebars produced at the factory are mainly produced between 6m and 12m due to the difficulty of transportation and processing. Since the length of the rebar produced at the factory is often shorter than the length required by the structure, rebar joints must necessarily occur at the site.

Structural Criteria KBC has the criteria for the role of reinforcing bars and the location of joints. The basis of reinforcing bar jointing is based on lap joints. However, when the reinforcing bars are piled up, many reinforcing bars are wasted due to the ensuring of the overlapping length. Also, if the reinforced concrete is rolled up in a member with insufficient concrete cross section, excessive rebar is likely to be placed in the joint area compared to the cross-sectional area of concrete. Also, in order to ensure the lap joint length at the site where the construction joint is to be made for the reason of the process, there is inconvenience that the reinforcing bars exceeding the overlap length must be pushed out from the construction joint toward the post-

In addition, there is a disadvantage that the performance of the gas pressure joint can not be guaranteed.

Many mechanical couplers have been used to compensate for these drawbacks. In the case of conventional threaded couplers, there is a disadvantage in that it is necessary to make a machining field in the field in order to manufacture the screw, or to leave a subcontract to the factory separately. Conventional wedge-type couplers can provide reliable reinforcement, but the method of fastening in the field is cumbersome and requires a lot of nut rotation to tighten the wedge. This also has the disadvantage that it is difficult to contract if the work space is narrow. In the case of a wedge-type coupler, the jointed reinforcing bars often show minute movements due to compressive force.

The technical problem to be solved by the present invention is to provide a wedge type spring reinforcing coupler capable of performing a simple and reliable mechanical reinforcing joint operation.

In order to solve the above-described problems,

A wedge-shaped spring reinforcing coupler for mechanically coupling reinforcing bars to resist external forces acting on the structure,

A tapered grip in the form of a cone divided into two or more pieces having a hole with a diameter slightly smaller than the diameter of the reinforcing bar at the center and having a wedge in the direction opposite to the insertion direction of the reinforcing bar

An annular ring that ties two or more grips together

A pair of shoelaces having a space for allowing the grip to be brought into close contact with the end portion thereof and a space in which a spring can be installed between the grip and the grip,

And a spring which strongly urges the two grips in opposite directions in a space provided between the two grips in a space provided between the two grips inside the engaged shoe.

As described above, according to the present invention,

By pushing the reinforcing bars into the coupler, most of the fastening work is accomplished easily, and it is possible to provide a wedge type spring coupler that can be surely subjected to tension and compression even with a slight tightening.

1 is a grip perspective view of a wedge type spring coupler,
Fig. 2 is a perspective view of an arm and a shoe covering the grip,
3 is an assembled perspective view of a wedge-type spring coupler,
Fig. 4 is a sectional view taken along the line A-A in Fig.
5 is a cross-sectional view of the rebar insertion,
Fig. 6 is a sectional view upon completion of reinforcing bars. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The wedge type spring coupler according to the present embodiment is for mechanically and structurally integrating the cut reinforcing bars.

The wedge type spring coupler of the present embodiment is composed of the grip 10, the spring 20, the green sheet 30, and the male thread 40. The grip (10) is tapered in the end direction and is made up of two or more split grips (11). The split grip 11 is tightened by the ring 13 in order to maintain the shape of the grip within the camber 30 and the male shoe 40 and is secured to the groove 12 so that the ring 13 can be in place. . On the inner surface of the split grip 11, there is a wedge 14 that directly contacts the reinforcing bar, which is disposed in a direction opposite to the direction in which the reinforcing bars are inserted, thereby preventing the reinforcing bars from escaping.

As the tensile force acts on the reinforcing bars, the wedge (14) of the dividing grip (11) further restrains the reinforcing bars due to the inclination of data generated in male and female (30) and male (40)

The grips 10 located at the ends of the two shoeholes 30 and 40 are connected to the reinforcing inserts 33 and 43 of the shoeholes 30 and 40 by the spring 20 supported by the opposite grip 10 I'm pushing it out.

The spring 20 resists the compressive force generated by the friction that the reinforcing bars come in through the reinforcing bars 33 and 43 and causes the wedge 14 to come in contact with the reinforcing bars 10. The grip 10 always comes in close contact with the reinforcing bars 33 and 43 Make it. Since the grip 10 is always in close contact with the reinforcing inserts 33 and 43 by the spring 20, most of the fastening operation is completed by simply inserting the reinforcing bars.

The present invention is completed when the grip 10, the spring 20, the green sheet 30 and the male thread 40 are combined as shown in Fig.

As shown in FIG. 4, before the rebar is assembled, the present invention shows a shape in which the abrasive 30 and the male 40 are joined by about two turns less. In this state, when two reinforcing bars are fully inserted into the reinforcing bars 33 and 43, the grip 10 remains in a state of being in close contact with the reinforcing bars 33 and 43 due to the restoring force of the spring 20, Constrains against insertion in the opposite direction. However, the inserted two reinforcing bars do not completely adhere to each other, and the reinforcing bars 50 are formed. This gap (50) provides the possibility of rebar movement during compressive force operation. The gap 50 is used to tighten the male and female threads 30 and 40 with the hexagonal hexagonal elements 32 and 42 for joining, and the two reinforcing bars are abutted against each other to be removed.

This allows the two reinforcing bars to be structurally integrated with a simple tightening operation after insertion without any additional processing.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those of ordinary skill in the art that various types of wedge-type spring couplers may be implemented without departing from the spirit of the present invention.

Claims (3)

A wedge-type spring coupler for mechanically and subsequently structurally integrating reinforcing bars,
Two grips tapered upward and divided into two or more pieces and having a reverse wedge in the direction of insertion of the reinforcing bars on the side in contact with the reinforcing bars,
A spring which is positioned between the two grips and pushes the light ends of the grips in opposite directions to come into close contact with each other,
A wedge-shaped spring coupler having a tapered surface having the same inclination as the taper of the grip, and having a reinforcing bar insertion portion and a hexagonal hexahedron for common use, and having a female screw and a male screw having female threads. The method according to claim 1,
A wedge-shaped spring coupler having a partition wall at one of the camshaft and the male shaft, and having a spring independent of the camshaft and the male shaft. 3. The method according to claim 1 or 2,
Wherein the taper angle of the grip is more gentle than the taper angle of the shoe.

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