KR101552321B1

KR101552321B1 - Steel Reinforcement Coupler and Joint Method Thereof

Info

Publication number: KR101552321B1
Application number: KR1020140138031A
Authority: KR
Inventors: 최영완
Original assignee: 거성 이.엔.지 주식회사
Priority date: 2014-10-14
Filing date: 2014-10-14
Publication date: 2015-09-10

Abstract

A coupler of the present invention comprises: a coupler body connecting ends of deformed bars with joints, and joining the deformed bars by inserting the deformed bars into both sides; a plurality of pressing bolts joined to the coupler body, coupling the deformed bars without the separation of the deformed bars from the coupler body by pressing the deformed bars; and a stopper inserted into a center of the coupler body to equally insert the deformed bars into both sides of the coupler body. The coupler body is formed into a cylindrical shape with an internal cavity. An uneven unit wherein a plurality of convex and concave portions are formed into a triangle shape to receive the joints of the rebar is formed on a half portion of an internal circumference of the cavity. The same number of tap holes, identical to the number of the pressing bolts, receiving the pressing bolts is formed on an upper part of the coupler body. Two stopper holes receiving the stopper to penetrate the stopper through the center of the coupler body are formed on the center of the coupler body. According to the rebar coupler and a rebar connecting method using the same of the present invention, the composition of the rebar coupler is very simple and is easily and conveniently assembled such that an efficiency of connecting the coupler to the rebar is excellent, and a coupling force is high by being locked by a plurality of pressing bolts and uneven unit by a plurality of steps. In addition, the present invention obtains an effect of connecting the rebar to the centers of the left rebar and right rear which are fixated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel reinforcing coupler,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coupler for connecting end portions of deformed reinforcing bars having joints, and a reinforcing bar connecting method using the same. More particularly, The present invention relates to a reinforcing coupler capable of supporting a reinforcing bar in any circumstance without being detached from the coupler by a multi-locking device, and a reinforcing bar connecting method using the same.

In general, concrete is a composite composition composed of cement, sand, gravel, water, etc. mixed at a suitable ratio. Although the compressive strength is relatively high, the tensile strength is very low compared with the compressive strength and cracks tend to occur. In order to increase the tensile strength of such concrete, reinforcing bars are installed in a form in which the concrete is laid, and then concrete is laid by reinforcing the strength of the concrete.

These conventional reinforced concrete structures are widely used in various construction and civil engineering works because they have excellent compressive and tensile strength and are able to construct various types of structures and have excellent physical properties.

A reinforcing bar used for reinforced concrete is a circular reinforcing bar and a deformed reinforcing bar. The round reinforcing bar means that there is no nodule on the surface of the reinforcing bar. The deformed reinforcing bar has ribs and ribs ). The deformed reinforcing bars are more adhesive to concrete than round reinforcing bars and have a smaller crack width when cracks occur in concrete. Generally, the reinforcing bars do not use circular reinforcing bars but use deformed reinforcing bars.

There are two kinds of reinforcing bars: SBC and SBR. The length of the rebar is 3.5 ~ 10.0m if ordered separately, and 6 ~ 12m when it is ordered. Circular reinforcing bars mean that there are no nodes on the surface of the reinforcing bars. The deformed reinforcing bars have nodes and ribs, and those formed in the axial direction are called libra and those formed in the circumferential direction are called nodes. The deformed reinforcing bars are more adhesive to the concrete than the round reinforcing bars and have a smaller crack width when the concrete is cracked.

Generally, the main steel bars do not use round bars but use deformed bars. Deformed bars represent the diameter and cross-sectional area in terms of nominal diameter and nominal cross-sectional area. Nominal diameter is the nominal cross-sectional area, assuming that the weight per unit length is the same as that of the deformed bar and the nominal diameter and the nominal diameter. The elastic modulus of reinforcing bars is 2.4 million kg / ㎠ and the coefficient of linear expansion is about 1.2 × 10 ^-5 / ℃, which is almost the same as concrete.

In order to install a mold in which concrete is laid in a conventional manner, the laying work for arranging the deformed reinforcing bars in a predetermined shape is performed. Since the deformed reinforcing bars are generally manufactured in a standardized length, And the conventional reinforcing bar connection method is proposed as a lap joint method, a weld joint method, a screw joint method, and a joining device joining method.

The folding method is a method in which the wires are wound around the ends of the deformed reinforcing bars which are overlapped with each other to connect the reinforcing bars to each other. However, since the reinforcing bars need to be wound around each of the reinforcing bars, the work is troublesome and the bending strength And it is pointed out that the problem of safety is weak.

On the other hand, the weld joint method is a method of welding the end portions of the deformed reinforcing bars against each other, and there is no problem because the strength of the connection portion is good. However, there is a disadvantage that the work is very troublesome and takes a long time and construction is delayed. In the screw joint method, a screw is formed at the connection end of the deformed reinforcing bar to interconnect them, which requires a facility for machining the connection end, and construction is impossible in a narrow space.

Also, the connecting device connecting method is a method of interconnecting both end portions of the deformed reinforcing bar using a connecting device. In the prior art, a deformed reinforcing bar is shaken inside the connecting device, thereby reducing the tensile strength of the reinforcing concrete The number of parts constituting the connecting device is large and the structure is complicated, resulting in a high production cost, and it takes a lot of time for the work, which causes a delay in construction and increases labor costs.

The reinforcing bar fixing coupler disclosed in Registration Practice No. 20-0412860 is formed as a pipe-shaped housing such that an engaging groove capable of engaging the reinforcing bars is formed on both sides of the reinforcing bar, and a plurality of supporting portions formed of a recess and a convex portion are formed in an annular shape And a bolt hole is formed on the outer side of the housing to intermittently move the reinforcing bar so that the reinforcing bar is fixed by bolts coupled to the bolt hole, And a bolt is short-circuited. In this case, the bolt hole is formed in the annular shape so as to enhance the binding force of the bolt along the bolt hole formed on the outside of the housing of the coupler. Which is different from the present invention.

This split member connector using the torque share bolt disclosed in Japanese Patent Laid-Open No. 10-1199848 has a structure in which continuous members such as long bars (deformed reinforcing bars, micro pile, soil nailing, steel bars, etc.) This split member connection port using a torque share bolt is provided with a male or female end at both ends of the member and a first and a second connecting piece that surrounds an outer circumferential area of the male or female end in an area smaller than half,

Wherein the first and second connecting pieces are engaged with each other through an engaging hole formed at one end of the lengthwise direction of the first and second connecting pieces, And a torque shear bolt is used to separate the head portion when the tightening torsional force is generated. However, the purpose of using the shear bolt is different and the structure is also different.

The connector for reinforcing bars disclosed in the Japanese Patent No. 10-1285704 includes a plurality of reinforcing bars each received from the longitudinal end thereof and a part of the inner periphery of the reinforcing bars is in contact with a portion of the side of the reinforcing bars, And the other part of the inner circumference is formed to have a second inside diameter larger than the first inside diameter and having at least one bolt fastening hole penetrating the outside and the second inside diameter, A bolt receiving groove corresponding to the bolt fastening hole at a predetermined position on the outer circumference and having a second inner diameter which is received in the second inner diameter and whose inner circumference is in contact with a part of the other side of the reinforcing bar by pressurization when the reinforcing bar is received, One end of which is provided in the bolt receiving groove so as to be smaller than the diameter of the bolt receiving groove and perpendicular to the longitudinal direction of the casing Wherein the bolt fastening hole and the bolt receiving groove are formed in a direction perpendicular to the direction of the length of the casing after the bolt fastening hole and the bolt receiving groove are fastened to each other, And a fastening bolt for providing a fastening force between the reinforcing bar and the casing and the reinforcing bar binding cap after the fastening protrusion is caught in the bolt fastening groove by the rotation of the fastening bolt. There is a disadvantage in that the bolt is not short-circuited and is different from the present invention.

In order to solve the above-mentioned problems, the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a reinforced concrete pipe having high fastening force by a multi- A reinforcing coupler and a reinforcing bar coupling method using the reinforcing coupler.

The coupler of the present invention comprises: a coupler body connecting end portions of a deformed reinforcing bar having a node therebetween, the deforming reinforcing bars being inserted into both sides to form two deformed reinforcing bars; A plurality of pushing bolts coupled to the coupler body to press the deformed reinforcing bars to bind the deformed reinforcing bars in the coupler body without coming off; And a stopper inserted in the center of the coupler body to uniformly insert the deformed reinforcing bars inserted into both sides of the coupler body.

Wherein the coupler body is formed in a cylindrical shape having a hollow therein and a half of the hollow inner circumferential surface is provided with concave and convex portions formed with a plurality of triangular concavities and convexities for receiving the node, Wherein a number of tapped holes is formed in a number equal to the number of the pressing bolts for receiving the pressing bolts, and two stopper holes are formed in the center of the coupler body to receive the stopper so that the stopper passes through the center of the coupler body to be.

The bolt head of the push bolt is fixed by pressing the deformed reinforcing bar inserted in the coupler body to block the formation of a space around the pebble due to the bolt head when the concrete is poured, A notch is formed.

The stopper has a hollow cylindrical shape with a plate, and both ends of the plate are made to have elasticity in the circumferential direction in order to prevent the insertion of the stopper into the coupler body and the insertion of the stopper. A gap is formed at regular intervals and both ends of the stopper in the longitudinal direction have a sloped surface 32 whose diameter is reduced so as to be easily inserted into the coupler body 1. [

The reinforcing joint method of the present invention is characterized in that when the stopper is inserted into the reinforcing bar by pushing the stopper downward by using a pin smaller than the outer diameter of the stopper after fitting the pushing bolt into the coupler body, A first step of preparing a coupler to be installed; And a coupler assembling step of inserting the coupler into the both ends of the central assembling reinforcing bar so that the coupler is inserted into both ends of the reinforcing bar from both ends thereof; A third step of inserting the center assembling reinforcing bars assembled at both ends between the left and right reinforcing bars; And a stopper mounting step of pushing the coupler assembled to the central assembling reinforcing bar to both ends by a predetermined distance so that the coupler is evenly positioned between the left and right fixing reinforcing bars and the center assembling reinforcing bars, ; And a pressing bolt mounting step of tightening the pressing bolt assembled to the coupler so that the bolt head is short-circuited.

The first step is a step 1-1 of a press bolt assembling step for assemble the press bolt to the coupler body. A stopper fitting step of fitting the stopper to the coupler body; And a stopper lowering step of lowering the stopper to a lower thickness by using a pin so that the coupler can move toward the center more than the end of the reinforcing steel rod for insertion when inserted into the reinforcing bar for the center assembly.

The above-described reinforcing coupler of the present invention and the reinforcing bar coupling method using the reinforcing coupler can solve the problems to be solved by the present invention.

According to the reinforcing coupler of the present invention and the reinforcing joint method using the reinforcing coupler, the components are very simple, easy to assemble and easy to work, and work efficiency of connection work with the reinforcing bars is excellent. And it is advantageous to connect the reinforcing bars to the center of the fixed reinforcing bars on the left and right sides.

Fig. 1 is a perspective view of the entire assembly before assembly according to the coupler of the present invention.
Fig. 2 is a cross-sectional view of the entire assembly after assembling according to the coupler of the present invention
Fig. 3 is a detailed view of the coupler body according to the coupler of the present invention
Fig. 4 is a detailed view of the fastening bolt according to the coupler of the present invention
5 is a detailed view of the stopper according to the coupler of the present invention
6 is a detailed view of a deformed reinforcing bar according to the coupler of the present invention
FIG. 7 is a flowchart of a reinforcing bar joint method using the coupler of the present invention
Fig. 8 is a schematic view showing a sequence of a rebar joint method using the coupler of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the following description, the term " reinforcing coupler and reinforcing bar using the reinforcing coupler " according to the present invention is defined as a term defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, It should be understood that the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a "reinforcing coupler and a reinforcing bar joint method using the same" according to the present invention will be described in detail.

The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

FIG. 3 is a detailed view of a coupler body according to the coupler of the present invention, and FIG. 4 is a cross-sectional view of the coupler of the present invention FIG. 5 is a detailed view of a stopper according to the coupler of the present invention, FIG. 6 is a detailed view of a deformed reinforcing bar according to the coupler of the present invention, and FIG. And FIG. 8 is a diagram illustrating an example of a sequence of a method of reinforcing bars using the coupler of the present invention.

As shown in Figs. 1 and 2, the coupler A of the present invention connects ends of a deformed reinforcing bar 4 having nods 41 therebetween, and the deformed reinforcing bars 4 are inserted into both sides to form two A coupler body (1) for forming a deformed reinforcing bar in an engagement shape; A plurality of pressing bolts (2) coupled to the coupler body (1) to press the deformed reinforcing bars (4) to bind the deformed reinforcing bars (4) in the coupler body (1) without coming off; And a stopper 3 inserted in the center of the coupler body 1 to uniformly insert the deformed reinforcing bars inserted into both sides of the coupler body 1.

2, the bolt head 21 of the push bolt 2 is inserted into the coupler body 1 to prevent a space from being formed around the gravel due to the bolt head 21 when the concrete is poured. The bolt head 21 is short-circuited after the deformed reinforcing bar 4 is pressed and fixed.

A concavo-convex portion 12 having a plurality of triangular concavities and convexities 121 is formed at a half of the inner circumferential surface of the coupler body 1 to accommodate the nodule 41, The deformed reinforcing bar 4 inserted in the coupler body 1 is pulled out because the deformed reinforcing bar 4 inserted in the coupler body 1 does not come off and presses the deformed reinforcing bar 4 by the pushing bolts, It plays a role.

As described above, the coupler A of the present invention is simple in that it has three components, is simple and easy to assemble, has excellent working efficiency in connection work with the deformed reinforcing bar 4, 2) and the concave and convex portions 12, and it is possible to connect the reinforcing bars to the center of the fixed reinforcing bars on the left and right sides.

As shown in FIG. 3, the coupler body 1 is a cylindrical shape in which the deformed reinforcing bars 4 are inserted into both sides so that two deformed reinforcing bars form a coupling shape, and hollows 11 are formed inside.

A concavo-convex portion 12 having a plurality of triangular-shaped concavities and convexities 121 is formed in a half of the hollow inner circumferential surface to accommodate the nodule 41, The reinforcing bar 4 does not come off but acts as a jaw.

At the upper end of the coupler body 1, a number of the tap holes 13 equal to the number of pressing bolts for receiving the pressing bolts 2 are formed.

The upper and lower stopper holes 14 are formed in the center of the coupler body 1 to receive the stopper 3 so that the stopper 3 can pass through the center of the coupler body 1.

4, the pressing bolt 2 is coupled to the coupler body 1 and presses the deformed reinforcing bar 4 so that the deformed reinforcing bar 4 does not come off from the coupler body 1 A plurality of pieces may be installed in a row or two or three rows may be provided at intervals of 90 degrees to increase the strength of the coupling between the deformed reinforcing bar 4 and the coupler A. [

The bolt head 21 of the push bolt 2 is provided with a bolt head 21 for blocking the formation of a space around the gravel due to the bolt head 21 when the concrete is poured, A notch 22 of a V-shape is formed so that the bolt head 21 can be short-circuited after the bolt head 4 is fixed by pressing.

5, the stopper 3 is inserted in the center of the coupler body 1 and serves to uniformly insert the deformed reinforcing bars 4 inserted into both sides of the coupler body 1 .

Since the stopper 3 is not fixed, when the stopper 3 is lowered to the lower thickness, the reinforcing bars can be moved freely within the coupler body 1, Since the coupler A can be moved toward the center of the reinforcing bars to be installed at the center when the reinforcing bars are combined, there is no restriction.

The stopper 3 is formed in a hollow cylindrical shape with a plate. The stopper 3 has a hollow cylindrical shape. The stopper 3 has both ends in the direction of the stopper 3 to prevent the coupler body 1 from being easily inserted into the coupler body 1, A gap 31 is formed at regular intervals to allow elasticity in the circumferential direction.

That is, since the stopper 3 is elastic, the stopper hole 14 can be inserted into the stopper hole 14 because of its elasticity. 3 is not pulled out. When the pin 33 is inserted in the stopper hole 14, it can be lowered by pressing it.

Both ends of the stopper 3 in the longitudinal direction have a sloped surface 32 whose diameter is reduced so as to be easily inserted into the coupler body 1. That is, since the inclined surface 32 is present, the stopper 3 can be pushed into the stopper hole 14 by applying a force.

As shown in FIG. 6, the deformed reinforcing bar 4 has a strong adhesive force with concrete and has a small crack width when cracks occur in the concrete, so that it is generally used for the main steel bars. And the ribs 42 and 42 are formed on the surface of the rounding surface to improve the surface roughness.

The reinforcing bars used in reinforced concrete are round bars and deformed bars. Circular bars mean that there are no bars on the surface of the reinforcing bars.

The coupler (A) of the present invention is for connecting the deformed reinforcing bars (4) to the deformed reinforcing bars (4).

As shown in FIGS. 7 and 8, the above-described method of joining reinforcing bars using the coupler A includes a method of joining the center assembling reinforcing bars 4c to the left and right fixing reinforcing bars 4a and 4b, to be.

The reinforcing bar connecting method is characterized in that the push bolt 2 is assembled to the coupler body 1 so as not to fall out and the stopper 3 is inserted into the coupler body 1 and then the pin 33) is used to push the stopper (3) downward so as not to be jammed when inserting the stopper (3) into the reinforcing bar; A second step in which the coupler A is sandwiched between both ends of the centering reinforcing bar 4c so that the coupler A is inserted into both ends of the reinforcing bar 4c; A third step of inserting reinforcing bars for center assembly in which the central assembling reinforcing bars 4c are assembled at both ends between the left fixing reinforcing bars 4a and the right fixing reinforcing bars 4b, Wow; The coupler A assembled to the central assembling reinforcing bar 4c is pushed to both ends by a certain distance so that the coupler A can equally distribute the left and right fixing reinforcing bars 4a and 4b and the center assembling reinforcing bars 4c And a stopper mounting step of pushing up the stopper (3) so as to raise the stopper (3); And a fifth step of mounting bolts (2) assembled to the coupler (A) to tighten the bolt head (21) so that the bolt head (21) is short-circuited.

The first step is a step 1-1 of a press bolt assembling step for assisting the press bolt (2) to the coupler body (1). A stopper fitting step of fitting the stopper (3) to the coupler body (1); The stopper 3 is fixed to the lower end of the reinforcing bar 4c by using the pin 33 so that the coupler A can be moved more toward the center than the end of the centering reinforcing bar 4c when the reinforcing bar 4c is inserted into the reinforcing bar 4c. And a step 1-3 of lowering the stopper downward.

The coupler A according to the present invention can move the stopper 3 toward the center of the reinforcing bar as shown in the second step of FIG. 8, so that the coupler A is not interfered by the stopper 3, It is possible to connect reinforcing bars with reinforcing bars.

As described above, the coupler A of the present invention is simple in that it has three components, is simple and easy to assemble, has excellent working efficiency in connection work with the deformed reinforcing bar 4, and has a plurality of pressing bolts 2 ) And the concave and convex portions 12, and the reinforcing bars can be connected to the center of the fixed reinforcing bars on the left and right sides.

A: Coupler
1: Coupler body 11: hollow
12: concave / convex portion 121: concave / convex
13: Tapped hole 14: Stopper hole
2: Pressing bolt 21: Bolt head
22: Notch
3: Stopper 31: Niche
32: slope surface 33: pin
4: deformed reinforcing bar 4a: left fixed reinforcing bar
4b: Right fixing steel 4c: Reinforcing steel for center assembly
41: bar 42: rib

Claims

In the coupler (A) for connecting the ends of the deformed reinforcing bars (4) having the nods (41) to each other,
The coupler (A) includes a coupler body (1) in which the deformed reinforcing bars (4) are inserted into both sides so that two deformed reinforcing bars form a coupling shape;
A plurality of pressing bolts (2) coupled to the coupler body (1) to press the deformed reinforcing bars (4) to bind the deformed reinforcing bars (4) in the coupler body (1) without coming off;
And a stopper 3 inserted in the center of the coupler body 1 and allowing the deformed reinforcing bars 4 to be inserted into both sides of the coupler body 1 to be inserted uniformly,
The coupler body (1) is cylindrical in which a hollow (11) is formed therein,
A concavo-convex portion 12 having a plurality of triangular-shaped concavities and convexities 121 is formed at a half of the hollow inner circumferential surface to accommodate the nodule 41,
At the upper end of the coupler body 1, a tapped hole 13 is formed in an amount equal to the number of bolts for receiving the pressing bolt 2,
The upper and lower stopper holes 14 are formed in the center of the coupler body 1 to receive the stopper 3 so that the stopper 3 can pass through the center of the coupler body 1,
The bolt head 21 of the push bolt 2 is provided with a bolt head 21 for blocking the formation of a space around the gravel due to the bolt head 21 when the concrete is poured, A V-shaped notch 22 is formed so that the bolt head 21 can be short-circuited after the bolt head 4 is pressed and fixed,
The stopper 3 has a hollow cylindrical shape with the plate being curved. The stopper 3 is formed with a gap 31 at a predetermined interval for allowing the stopper 3 to have elasticity in the circumferential direction,
Wherein the stopper (3) is structured such that both ends of the stopper (3) in the longitudinal direction have inclined surfaces (32) whose diameters are reduced so as to be easily inserted into the coupler body (1)

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