KR20010103205A - Steel bars splicing device - Google Patents

Abstract

The present invention relates to a reinforcing bar device that can effectively transmit not only the tensile force applied to the reinforcement but also the compressive force by connecting the end and the end of the reinforcement mechanically in contact with each other in reinforced concrete construction.

The rebar joint device of the present invention has a semi-cylindrical shape and has a pair of pairs of knitted bodies (2) in which a nodular groove (25) into which a node of a deformed steel bar is fitted on an inner surface thereof, and a male thread (4) formed on one end of an outer surface thereof. The first coupler 3A of the top and a straight portion 5 having a constant diameter in a cylindrical shape, and an inclined portion 6 connected to the straight portion 5 and gradually decreasing in diameter. An internal thread (5 ') is formed inside and consists of the 2nd coupler (3B) which engages with the external thread (4) formed in the outer surface of the said 1st coupler (3A).

Therefore, the rebar joint device of the present invention has a small number of parts and is easy to assemble, and by assembling two reinforcing bars to be in contact with each other, the tensile force and the compressive force can be effectively transmitted, thereby minimizing slip amount.

Description

Reinforcing bar device {Steel bars splicing device}

The present invention relates to a rebar joint apparatus. More specifically, the present invention relates to a reinforcing bar device that can effectively transmit not only tensile force applied to the reinforcing bar but also compressive force by mechanically connecting the end and the end of the reinforcing bar by using a knitting body and a coupler in reinforced concrete construction.

Reinforced concrete structure is a structure in which the concrete bears the compressive force and the reinforcement bears the tensile force. Concrete can be installed integrally because the formwork is installed and poured, but the reinforcing bar is inevitably occurred between the reinforcing bar and the rebar because the construction must be carried out to continue the standard product of a certain length. The joints between reinforcing bars should be able to transfer the total stress of one reinforcing bar to the other bars, and the joints of reinforcing bars usually use overlapping joints by adhesive force, welding joints, or mechanical joints using connecting materials.

Overlap joints are reinforced with reinforcing bars and reinforcing bars over the length of the joint and tied with a binding line. The advantages of easy reinforcing work, but when the diameter of the bar is large, there is a problem of structural strength due to eccentricity. If the concrete member is thin, and the concrete member is thin, the cross-section of the formwork is narrowed due to the overlapping reinforcing bars, so that concrete pouring is not easy.

Reinforcement joint method by pressing is a method of integrally forming the end by heating and pressing after connecting the end of the reinforcing bar and the reinforcing bar. However, the method of connecting the reinforcement by pressure welding causes many problems such as changing the mechanical and material properties of the rebar and lowering the elongation as the rebar ends are heated.

In order to solve the problem of overlapping joints and welded joints as described above, a mechanical reinforcing joint method for supporting two bars of rebar with a piece and connecting them by a coupler has been developed and used. However, in the conventional method of reinforcing bars using mechanical reinforcing bars, the minimum performance for the transfer of tensile force is satisfactory, but when the reverse shape of the load occurs, a large amount of slip occurs due to the play in the reinforcing bars.

Therefore, the present inventors have developed a reinforcing bar joint device that can control the amount of slip generated in the reinforcing bar joint by making the reinforcing bar to be in contact with each other and can effectively transmit not only the tensile force but also the compressive force.

It is an object of the present invention to provide a reinforcing bar fitting apparatus having a small number of parts and easy assembly.

Another object of the present invention is to provide a reinforcing bar joint apparatus that can effectively transfer not only tensile force but also compressive force by minimizing slip amount by assembling two reinforcing bars to be in contact with each other.

1 and 2 are cross-sectional views and perspective views of the reinforcing bar apparatus of the present invention.

3 is an exploded perspective view of a pair of pieces.

4 is an exploded perspective view of a stepped body which is the first variant of the body.

FIG. 5 is an exploded perspective view of a long piece that is a second variant of the piece.

6 and 7 are cross-sectional and perspective views of another embodiment of the reinforcing bar joint apparatus of the present invention.

<Short description of the symbols in the drawings>

1: rebar 2, 2 ′, 2 ″

3A, 13A: first coupler 3B, 13B: second coupler

4, 14: external thread 5, 15: straight part

5 ＇, 15＇: internal thread 6, 16: slope

25, 25 ＇, 25＂: node groove

The present invention will be described with reference to the drawings.

1 and 2 are cross-sectional and perspective views of the reinforcing bar joint of the present invention, and FIGS. 3 to 5 are separate perspective views of a knitting body which is a component of the reinforcing bar connecting device, wherein the reinforcing bar connecting devices of the present invention are connected to each other. It consists of two pairs of pairs of pieces 2 coupled to each of the reinforcing bars 1 and a pair of couplers 3 wrapped around the piece 2 and pressed.

The knitting body 2 is a semi-cylindrical shape, the inner surface is formed with a groove groove 25 so that a pair of pieces of the knitting body 2 on both sides can be fitted into the deformed rebar. Therefore, when the pair of pieces are combined with the deformed reinforcing bar, the bar of the deformed bar is fitted into the nodular groove 25 to surround the entire reinforcing bar in the radial direction of the deformed bar.

As shown in FIGS. 4 and 5, the pair of pieces 2 may increase the coupling force between the pieces and the deformed steel bars according to the shape of the surface where the pair of pieces are engaged. The pair of staircases (2 ') having a jaw (26) formed to engage with each other in a stepped shape is fixed when combined with the deformed reinforcing bar so as not to be pushed, and can be combined with less force when the reinforcing bar works. In addition, one of the pair of pairs 2 ″ of the projection (27 ″) is formed in the center of the mating surface protruding from the center of the mating surface and the other, the groove (28) having a groove (28) is engaged with the projection 27 Makes meshing with deformed rebar more effective.

The first coupler 3A has a cylindrical shape and its inner diameter matches the outer diameter of the piece, and when combined with a pair of pieces 2 in combination with a deformed steel bar, the first coupler 3A can be crimped while wrapping the piece. A male screw 4 is formed at one end of the outer surface of the first coupler 3A.

The second coupler 3B is divided into a straight portion 5 having a constant diameter and one end portion connected to the straight portion 5 and an inclined portion 6 having a smaller diameter toward the other end portion. The inner diameter of the straight portion 5 coincides with the outer diameter of the first coupler 3A, and an internal thread 5 ＇is formed on the inner surface of the straight portion 5 so as to be formed at one end of the first coupler 3A. It is fastened with the external thread (4). The inclined portion 6 is capable of compressing the end of the knitted fabric combined with the reinforcing bar when its inner surface is inclined parallel to the outer surface. Alternatively, as shown in FIG. 6, when the inner diameter of the inclined portion 16 is formed to be the same as the outer diameter of the knitted body 2, the entire inclined portion 16 abuts on the knitted body 2 to more strongly press the knitted body 2 coupled with the reinforcing bars. You can do it.

The installation method of the reinforcing bar apparatus of the present invention is as follows.

First, insert couplers 3A and 3B into each of the two rebars to be connected. After adjusting the installation position of the knitting body 2 to each of the reinforcing bar fitted with the pair of couplers 3A and 3B, the knitting body is coupled to the reinforcing bar and the male screw 4 and the second coupler 3B of the first coupler 3A are connected. Tighten the female thread (5 ＇). When the two reinforcing bars 1 are tightened with each other with a torque wrench, the reinforcing bar 1, the knitting body 2, and the coupler 3A, 3B are tightly bound together and the two reinforcing bars 1 are connected to each other. do.

Therefore, when connecting the two reinforcing bar as described above, the tensile force acting on the reinforcing bar is transferred to the other reinforcing bar through the knitting and coupler from one reinforcing bar, and the compressive force can be properly transmitted because the reinforcing bar is in contact with each other.

Reinforcing bar joint device of the present invention is a mechanical reinforcing bar device to compensate for the shortcomings, such as overlapping joints, welding joints used in the existing, it can be easily assembled with a small number of parts (couplers and pieces). In addition, using the reinforcing bar joint device of the present invention can be assembled so that the two reinforcing bars to be in contact with each other can minimize the amount of slip and as a result can effectively transmit the tensile force and compression force.

Claims (4)

Semi-cylindrical shape, the inner surface has two pairs of pieces (2) formed with a groove groove 25 is inserted into the node of the rebar; A cylindrical first coupler 3A having a male screw 4 formed at one end of the outer surface; And, The cylindrical portion is divided into a straight portion 5 having a constant diameter and an inclined portion 6 connected to the straight portion 5 and gradually decreasing in diameter, and an internal thread 5 ＇is formed inside the straight portion 5. A second coupler 3B formed to be engaged with the male screw 4 formed on the outer surface of the first coupler 3A: Reinforcing bar device, characterized in that consisting of. The second coupler (3B) is made of a material whose inner diameter of the inclined portion 16 coincides with the outer diameter of the knitted fabric (2) such that the inner surface of the inclined portion (16) and the knitted fabric (2) abut each other. Rebar splice device characterized in that the coupler (13B). 3. The knitting body (2) according to claim 1 or 2, characterized in that the knitting body (2) is a knitting body (2 ') in which a jaw (26) is formed such that when a pair of knitting bodies are joined to each other, their engaging surfaces are stepped together. Rebar Fittings. The groove (2) according to claim 1 or 2, wherein the knitting body (2) is a groove in which one of the surfaces of the knitting body is joined to each other, one of which has a projection (27) protruding from the center and the other of the knitting body (27). Reinforcing bar fittings, characterized in that (38) is a knitted body (2 ″) is formed.