KR100346094B1 - Steel bars splicing device - Google Patents

Abstract

The present invention relates to a mechanical reinforcing bar joint apparatus that can absorb the construction error between the reinforcing bars of the center line does not match by using the spherical knitted body and the spherical coupler of the reinforcing bar and reinforcing bar in precast concrete construction.

Reinforcing bar coupling device is a pair of two pairs of hemispherical knit pieces (2) coupled to each of the reinforcing bars connected to each other, a pair of couplers (3) wrapped around the knitting and pressed, the connection member 8 and the coupler coupler is fastened It consists of a filler 40 is filled in the space between the reinforcing bar connected to the knitting body, coupler and connecting member. According to the coupling method of the connection member and the coupler is divided into an inner connection type or an external connection type, and a coupler having a female thread formed on one side and a male thread formed on the other to be fastened to each other without a connecting member.

Reinforcing bar joint device of the present invention is a mechanical reinforcing bar device to compensate for the disadvantages such as overlapping joints, welded joints used in the existing, the combination of the two reinforcing bars that do not match the center line with the spherical piece and coupler of the spherical As the knitting and coupler rotates, two reinforcing bars are connected, and a filler is filled in the coupler to integrate the two reinforcing bars.

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 mechanical reinforcing bar device that can absorb construction errors between reinforcing bars whose center lines do not coincide by using spherical knitted bodies and spherical couplers in precast 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 another bar, 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 are tied with a binding line.The advantages of easy reinforcement work are great, but when the diameter of the rebar 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 rebars, there is a problem 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.

On the other hand, in the mechanical reinforcing bar joint method using the knitting and the coupler is coupled to the straight line and the coupler is possible only a straight reinforcing bar. However, when the precast reinforced concrete members manufactured in the factory are assembled in the field, the center line of the connected reinforcing bars causes construction errors, and thus, the mechanical reinforcing joint method cannot be applied.

The present inventors use a spherical knitted body and a spherical coupler even if the reinforcing bars embedded in the precast member are not aligned with each other, and the reinforcing joint can absorb the construction error when the rebar joint is rotated at the end of the rebar. The device was developed.

An object of the present invention is to use a spherical knitted body and coupler even if the center line of the reinforcing bar embedded in the precast member does not coincide with each other, the reinforcing joint can absorb the construction error when the knitting and coupler rotates at the rebar end To provide a device.

Another object of the present invention is to connect the two reinforcing bars while filling the reinforcing bar when the knitting and couplers are coupled to each other and filling with fillers to prevent the separation of the reinforcement, play and flow occurs, as well as tensile and compressive force It is to provide a reinforcing bar device having a function of transmitting.

1 and 2 are a cross-sectional view and a perspective view of the connection member type reinforcing bar connection apparatus of the present invention.

3 is an exploded perspective view of a pair of hemispherical bodies.

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

FIG. 5 is an exploded perspective view of the tenoned body, which is the second variant of the hemispherical body.

FIG. 6 is a cross-sectional view showing joints of two reinforcing bars whose center lines do not coincide with the reinforcing bar connecting apparatus of FIG.

7 and 8 are cross-sectional views and perspective views of the external connection type rebar splice apparatus of the present invention.

9 and 10 are cross-sectional views and perspective views of the male and female threaded reinforcing bars of the present invention.

<Short description of the symbols in the drawings>

1: rebar 2: hemispherical shape

3, 13, 23: coupler 4, 14, 24: straight part

5, 15, 25: curved portion 6, 16, 26: injection hole

7, 17, 27: outlet 8, 18: connecting member

40: filling material

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

1 and 2 are a cross-sectional view and a perspective view of the connection member type rebar splice device of the present invention, Figures 3 to 5 is an exploded perspective view of the hemispherical knitted body which is a component of the reinforcing bar connection device.

Reinforcing member type reinforcing bar coupling device is a pair of two pairs of hemispherical pieces (2) coupled to each of the reinforcing bars (1) connected to each other, a pair of couplers (3) wrapped around the knitting (2) and the pair of couplers ( It consists of a connection member 8 is fastened to the 3A, 3B and the filler 40 is filled in the space between the reinforcing bar connected by the knitted body 2, the coupler 3 and the connection member (8).

The pair of hemispherical knit bodies 2 is a semi-cylindrical groove 34 into a smooth surface 32 which is cut in half and has the hemispherical knit bodies 2 on both sides thereof so that the rebar can be fitted. It is dug and the groove 35 is formed in the groove 34. Therefore, when the pair of hemispherical pieces are bonded to the rebar, the pair of hemispherical pieces surround the entire reinforcing bar in the radial direction of the deformed bar.

The pair of knitting bodies can increase the bonding force between the knitting body and the deformed reinforcing bar according to the shape of the smooth surfaces 32 'and 32 ″ cut as shown in FIGS. 4 and 5. A pair of staircases (2 ') having smooth surfaces (32') formed with jaws (36) formed to engage each other in a staircase form are fixed when combined with deformed rebars and are not pushed, and with less force during reinforcing bars. To enable coupling. In addition, one of the pair of pieces 2 ″ has a long rectangular piece having a groove 38 formed so that the projection 37 protrudes from the center of the cut smooth surface 32 ″ and the other has a groove 38 engaged with the projection 37. 2 ″) makes the meshing with the deformed bars more effective.

The pair of couplers 3A and 3B are generally divided into a straight portion 4 having a constant diameter in a cylindrical shape and a curved portion 5 that decreases in diameter toward the end. A female screw is formed inside the straight portion 4, and the curved portion 5 is curved with the same curvature as the knit so as to wrap the pair of hemispherical knitted bodies 2 coupled with the reinforcing bar 1. An injection hole 6 or an outlet 7 is formed between the straight portion 4 and the curved portion 5 so that the filler 4 is injected into the injection hole 6 or the air therein when the filler 40 is injected. Is discharged through the outlet (7).

The connecting member 8 has a cylindrical shape, and the outer diameter of the center portion is larger than that of both ends, so that a stage is formed between the center portion and both ends, and the center portion protrudes. Male threads are formed at both ends, and the coupler 3 is fastened to both of the coupler 3.

Filler 40 is injected through the inlet 6 formed in the coupler (3A) and fills the space between the two reinforcing bars connected by using the knitting body 2, the coupler (3A, 3B) and the connecting member (8) It serves to prevent the departure of the rebar, play or flow and to transmit the compressive force. As the filler 40, non-shrink mortar, resin, or the like can be used.

The installation method of the internally-connected rebar joint is as follows. Insert each of the two reinforcing bars (1) to be connected from the curved portion (4) of the coupler (3A, 3B). A pair of hemispherical pieces 2 are coupled to the reinforcing bar ends into which the pair of couplers 3A and 3B are fitted, and the male threads formed on both ends 10 of the connecting member 8 and the straight parts 5 of the couplers 3A and 3B. Tighten the female screw. At this time, if the center line of the two reinforcing bars do not match, as in the case of Figure 6, the spherical knitted body and the coupler is rotated at the coupling portion with the rebar, the coupler and the connecting member is fastened to each other. When the torque wrench is tightened to a certain level of torque coefficient, the reinforcing bars 1 on both sides of the connecting member 8 and the knitted body 2 and the curved portion 4 of the coupler 3A and 3B are pressed together. It is tightly bound and the two reinforcing bars 1 are connected to each other. Injecting the filler material 40 through the inlet 6 of one coupler 3A into the empty space between two connected reinforcing bars 1 causes the air to be discharged to the outlet of the other coupler 3B and the connected reinforcing bars are more strongly integrated. . Therefore, when the two reinforcing bar is connected as described above, the tensile force of the reinforcing bar is transferred from one reinforcing bar to a pair of pieces, a coupler, a connecting member, and then to the other coupler, a piece of rebar.

7 and 8 are cross-sectional views and perspective views of the external connection type reinforcing bar joint apparatus of the present invention, but the same as the previous connection type reinforcing bar joint device, but the coupling method of the coupler (13A, 13B) and the connecting member (18). There is a difference.

The pair of couplers is divided into a cylindrical portion 14 having a constant diameter and a curved portion 14 whose diameter decreases toward the end. The straight portion 14 is curved with the same curvature as the knit body 2 so as to be able to wrap the pair of hemispherical knit bodies 2 coupled to the reinforcing bar 1 on the outer surface thereof and the curved portion 14. do. An injection hole 16 may be formed between the straight portion 14 and the curved portion 15 of the first coupler 13A among the pair of couplers to fill the filler 40. The connecting member 18 is cylindrical and has female threads formed in both ends thereof, and is coupled to the coupler pairs 13A and 13B. In addition, the outlet 17 is formed in the center of the connecting member 18, the air in the reinforcing bar when the filler 40 is filled between the two reinforcing bars connected through the inlet 16 of the coupler (13A) It is discharged through the outlet 17. Therefore, the external connection type reinforcing bar coupling device is coupled to the male screw of the pair of coupler (13A, 13B) straight portion 14 is fastened to the female screw inside the connecting member (18).

9 and 10 are cross-sectional views and perspective views of the male and female reinforcing bar connecting apparatus of the present invention, which is composed of a pair of hemispherical pieces 22 and a pair of couplers 23A and 23B.

The pair of hemispherical pieces (2) is the same as in the inner connection type rebar joint device and the external connection type rebar joint device described above, while the pair of couplers (23A, 23B) is fastened together without a separate connection member.

The first coupler 23A has a straight portion 24 having a constant diameter, and one end portion is connected to the straight portion 24 and the inclined portion 28 and the inclined portion 28 are smaller in diameter toward the other end. It is divided into a curved portion 25 to be connected. The internal thread is formed inside the straight portion 24 and the curved portion 25 is curved with the same curvature as the knitted fabric 2 so as to cover the pair of knitted fabrics 2 coupled with the deformed rebar and the inclined portion 28 ) Is formed in the inlet 26 and the outlet 27, the air is discharged to the outlet 27 when the filler 40 is injected into the inlet (26).

The second coupler 23B is divided into a straight portion 24 'having a constant diameter and a curved portion 25' having a smaller diameter toward the end. The outer surface of the straight portion 24 'is provided with a male screw to be fastened to the female screw of the first coupler 23A, and the curved portion 25' is configured to wrap a pair of knitted bodies 2 coupled with a deformed rebar. It is curved with the same curvature as (2)

Reinforcing bar joint device of the present invention is one of the mechanical joint method to compensate for the disadvantages of the conventional joints, welded joints, etc., combining the two reinforcing bars of the center line does not coincide with the spherical knitting and coupler in precast concrete construction When the spherical knitted body and coupler is rotated, the two reinforcing bars are connected, and the two reinforcing bars are integrated by filling a filler inside the coupler.

Claims (5)

Two pairs of hemispherical pieces 2 having a semi-cylindrical groove 34 formed on a smooth surface 32 and a node groove 35 into which a node of a deformed steel is fitted into the groove 34. ); The cylindrical portion is divided into a straight portion 4 having a constant diameter and a curved portion 5 which decreases toward an end of the diameter. A female thread is formed inside the straight portion 4, and the curved portion 5 is the knitted body. A pair of couplers 3A and 3B which are curved with the same curvature as in (2) and having an injection hole 6 formed between the straight portion 4 and the curved portion 5; A male screw formed at both ends in a cylindrical shape, the coupling member 8 being fastened to both sides of the pair of couplers 3A and 3B; And, Filler 40 is filled in the interior of the coupler and the connection member through the inlet 6 formed in the coupler (3A); Reinforcing bar device, characterized in that consisting of. Two pairs of hemispherical pieces 2 having a semi-cylindrical groove 34 formed on a smooth surface 32 and a node groove 35 into which a node of a deformed steel is fitted into the groove 34. ); The cylindrical portion is divided into a straight portion 14 having a constant diameter and a curved portion 15 that decreases toward an end of the diameter. The straight portion 14 has a male screw formed therein, and the curved portion 15 is coupled to a deformed rebar. It consists of two couplers 13A and 13B curved with the same curvature as the knitting body 2 so as to wrap the pair of hemispherical knitting bodies 2, and the straight portion 14 and the curved surface of one of the couplers 13A. A pair of couplers 13A and 13B having an injection hole 16 formed between the sections 15; A discharge member 17 formed in a center in a cylindrical shape and a female screw formed in both ends thereof, the connecting member 18 being fastened to both sides of the pair of couplers 13A and 13B; And, Filler 40 is filled in the interior of the coupler (13A, 13B) and the connection member 18 through the injection hole 16 formed in the coupler (13A); Reinforcing bar device, characterized in that consisting of. Two pairs of hemispherical pieces 2 having a semi-cylindrical groove 34 formed on a smooth surface 32 and a node groove 35 into which a node of a deformed steel is fitted into the groove 34. ); It is divided into a straight portion 24 having a cylindrical shape with a constant diameter, an inclined portion 28 connected to the straight portion 24 and gradually decreasing in diameter, and a curved portion 25 connected to the inclined portion 28, The internal thread is formed inside the straight portion 24 and the curved portion 25 is curved with the same curvature as the knitted fabric 2 so as to cover the pair of knitted fabrics 2 coupled with the deformed rebar and the inclined portion 28 ) Is a first coupler (23A) formed with an inlet (26) and an outlet (27): The cylindrical portion is divided into a straight portion 24 'having a constant diameter and a curved portion 25' having a smaller diameter toward the end portion. A male screw is formed on an outer surface of the straight portion 24 'to form the first coupler 23A. A second coupler (23B) fastened to the female screw and curved with the same curvature as that of the knitted fabric (2) to wrap the pair of knitted fabrics (2) coupled to the rebar; And, Filler 40 is filled in the internal space of the sieve coupler (23A) and the second coupler (23B) through the injection hole 26 formed in the coupler (23A); Reinforcing bar device, characterized in that consisting of. 2. The reinforcing bar device according to claim 1, wherein the pair of pieces (2) is a piece (2 ') in which a jaw (36) is formed so that the cut smooth surfaces (32') of the spheres mesh with each other in a stepped manner. 2. The knitting body (2) according to claim 1, wherein one of the pair of knitting bodies (2) has a projection (37) protruding from the center of the cut smooth surface (32 ") of the sphere and the other forming a groove (38) engaging the projection. Reinforcing bar device characterized in that ").