KR101643846B1 - One-touch type steel reinforcing coupler - Google Patents

One-touch type steel reinforcing coupler Download PDF

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Publication number
KR101643846B1
KR101643846B1 KR1020150071445A KR20150071445A KR101643846B1 KR 101643846 B1 KR101643846 B1 KR 101643846B1 KR 1020150071445 A KR1020150071445 A KR 1020150071445A KR 20150071445 A KR20150071445 A KR 20150071445A KR 101643846 B1 KR101643846 B1 KR 101643846B1
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South Korea
Prior art keywords
coupler
axial direction
spring
coupler body
bodies
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KR1020150071445A
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Korean (ko)
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차충환
김형식
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주식회사 씨케이인터스틸
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162Connectors or means for connecting parts for reinforcements
    • E04C5/163Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165Coaxial connection by means of sleeves

Abstract

The present invention relates to an automatic one-touch rebar coupler. More specifically, the automatic one-touch rebar coupler comprises: a pair of coupler bodies screw-mounted and provided with a hollow space whose both ends are opened, and a taper unit formed on an end of an upper side of the hollow space, wherein an inner radius thereof becomes larger towards the inside thereof in an axial direction from the outside thereof; a plurality of piece bodies which moves on the inside of the coupler bodies in the axial direction, and has an inclined surface and an O-ring accommodation groove formed on an outer surface thereof to correspond to the taper unit, and a plurality of ratchet protrusions formed on an inner surface thereof to stop and support node protrusions of a rebar; an O-ring inserted into the O-ring accommodation groove to tightly attach the piece bodies in the axial direction; an inner spring which is connected to inner surfaces of the piece bodies and applies an elastic force pushing an inserted rebar from the inside towards the outside in the axial direction, wherein an upper end of one side thereof is closely attached to the piece bodies; an outer spring supported on bottom surfaces of the piece bodies to apply an elastic force pushing the piece bodies from the inside towards the outside in the axial direction; and a disk-shaped barrier arranged between the outer spring of a first coupler body and the outer spring of a second coupler body to prevent the outer springs from tangling and interfering with each other. Accordingly, the automatic one-touch rebar coupler can be easily installed by simply mounting a rebar. Economic efficiency can be obtained by reducing a material. A concrete cover thickness of a reinforced concrete structure can be sufficiently satisfied.

Description

ONE-TOUCH TYPE STEEL REINFORCING COUPLER

The present invention relates to a one-touch type automatic reinforcing coupler, and more particularly, to a reinforcing coupler capable of easily fastening a pair of reinforcing bars by a one-touch method at the time of construction site assembly.

Reinforcing bars used in reinforced concrete structures must be joined at regular lengths due to the limit of production length or the limit of construction method.

Generally, the joining method of reinforcing bars can be divided into lap joints that transfer the stresses of the reinforcing bars to the concrete around the reinforcing bars and gas pressure joints and mechanical joints that directly transmit the stresses of the reinforcing bars.

Overlap joints are the most commonly used joints in the conventional method, in which reinforcing bars and reinforcing bars are overlapped to a certain length so that they can be joined through the adhesive force with concrete. However, the larger the diameter of the reinforcing bars, , Reinforced concrete members (pillars, beams) are applied on the basis of the thickness and the spacing of reinforcing bars. Therefore, 'reinforcing bars exceeding D35 should not be overlapped in concrete structure design standards'. . In addition, it is not easy to ensure proper spacing of reinforcing bars in lap joints, which may cause problems in the filling of concrete. Further, loss occurs at the overlapping joint portion, and there is also a problem that it is difficult to manage the construction with respect to the deterioration of the strength due to the section defect and the joint length.

In addition, welded joints have a short protrusion length of reinforcing bars and can be connected even in a narrow place. The arc-stud welding time is minimized, but interference between adjacent reinforcing bars occurs due to the welding position, Over time, fluctuations in construction quality due to climate, the need for skilled craftsmen, and the possibility of a strike-slip mechanism in the event of an earthquake.

On the other hand, mechanical joint is a method of joining reinforcing bars that can resist tensile force irrespective of the adhesive strength of concrete by connecting the two reinforcing bars using an intermediate member (coupler). Depending on the method and type of joint, it can be classified into screw type, steel pipe compression type, wedge type, and mortar type, and the use thereof is continuously increasing. Although the strength of the joint is stable and unaffected by the worker's skill and weather, it is very small in the joint due to the limitations of the connection method, but slip may occur and it is most disadvantageous in terms of economy compared to the gas pressure point .

 In addition, the threaded coupler method, which occupies most of the mechanical joints, is structurally problematic due to a fine clearance between the threads, which is inevitably existed because the female thread type and the male thread type are combined. Such minute clearances may cause a loosening phenomenon if momentary large loads or repetitive loads such as earthquakes are applied, and the strength of the joints may be greatly reduced, which may have a fatal impact on the structure.

Most of the conventional reinforcing bars are structured by inserting reinforcing bars into the inside of the housing and then screwing the housing into a screw, which is complicated in structure and difficult to connect the reinforcing bars. have.

In order to solve such a problem, Korean Patent Registration No. 0439305 (registered on Jun. 28, 2004) discloses a hollow inner coupler which is open on both sides of which reinforcing bars are inserted so as to face each other and a hollow inner coupler which is slidably coupled to both sides of the outer surface of the inner coupler An outer coupler, a plurality of balls reciprocating between the inner coupler and the outer coupler to control the flow of the reinforcing bars, and an elastic spring elastically urged between the inner coupler and the outer coupler to generate a predetermined elastic force therebetween Quot; one-touch type reinforcing bar coupling device ". However, there is a high possibility that deformation of a reinforcing bar joint or loss of a ball may occur due to structural deformation or other external force, which makes it impossible to commercialize it.

Accordingly, an object of the present invention is to provide a one-touch type automatic reinforcing coupler that is simple in construction, light in weight, easy to carry, shortened in air, and manufactured economically.

Another problem to be solved by the present invention is to provide a one-touch automatic reinforcing coupler which is free from slip, loosening or residual deformation inside the fastener even if momentarily large and repetitive external force acts due to strong wind or earthquake load .

Another problem to be solved by the present invention is to provide a one-touch automatic reinforcing coupler that exhibits sufficient strength not to be broken first in a fastener even when the load reaches and is destroyed under an extreme load.

Another problem to be solved by the present invention is to design the reinforced concrete structure so that the thickness of the concrete of the reinforced concrete structure does not exceed the diameter of the cross-sectional area of the reinforcing steel, The present invention provides a one-touch automatic reinforcing coupler capable of satisfying the above requirements.

In order to solve these technical problems, a one-touch automatic reinforcing coupler according to a preferred embodiment of the present invention includes a hollow portion having both ends opened and a tapered portion formed at an upper end of the hollow portion so as to have an inner diameter larger toward the inner side in the axial direction A pair of coupler bodies, each of which is threaded; A plurality of ratchet protrusions, which are movable in an axial direction on the inside of the coupler body, have inclined surfaces corresponding to the tapered portions and O-ring receiving grooves formed on an outer surface thereof, A plurality of assemblies formed; An O-ring inserted into the O-ring receiving groove to closely contact the plurality of knobs in the axial direction; An inner spring connected to an inner surface of the plurality of jibs and having an upper end portion tightly adhered to the jibs by the O-ring and exerting an elastic force to push the incoming reinforcing bar from the inner side in an axial direction outward; An outer spring supported on a bottom surface of the plurality of plates to exert an elastic force to push the plates inward from the inner side in an axial direction; And a circular diaphragm disposed between the outer springs to prevent entanglement and interference between the outer springs.

 The coupler body according to the present invention includes a hollow portion having both ends opened, a tapered portion formed at an upper end of the hollow portion so as to have an inner diameter larger toward the inner side in the axial direction from the outer side, A first coupler body having a male thread portion formed at a lower end thereof; A female screw portion formed on the inner side surface to be screwed with the male screw portion of the first coupler body at an upper end of the hollow portion; and a female screw portion extending from the female screw portion and having an inner diameter smaller toward the lower axial direction And a second coupler body having a tapered portion formed thereon.

It is further preferable that the inner diameter of the outer spring according to the present invention is larger than the outer diameter of the inner spring.

Preferably, the inner spring according to the present invention is manufactured without a pitch at an upper end which is in contact with the fixture.

As described above, according to the one-touch automatic reinforcing coupler of the present invention, it is possible to provide a one-touch automatic reinforcing coupler which is simple in construction, light in weight, easy to carry, have.

Further, according to the one-touch automatic reinforcing coupler of the present invention, it is possible to provide a reinforcing coupler capable of preventing slip, loosening or residual deformation.

In addition, according to the one-touch automatic reinforcing coupler of the present invention, a reinforcing coupler capable of reducing the cost in an economical shape while satisfying the mechanical properties required in the standard such as tensile strength can be provided.

Further, according to the one-touch automatic reinforcing coupler according to the present invention, it is possible to provide a reinforcing coupler which is one-touch type and can be easily fastened by anyone, even if not an expert.

In addition, according to the one-touch automatic reinforcing coupler of the present invention, there is an effect of providing a slim type reinforcing coupler that can satisfy the concrete covering thickness of the reinforced concrete structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view illustrating a shape of a one-touch automatic reinforcing coupler and a reinforcing bar according to a preferred embodiment of the present invention;
Fig. 2 is a sectional view of Fig. 1,
3 is an overall sectional view of a one-touch automatic reinforcing coupler according to the present invention,
4 is a cross-sectional view of the coupler body,
5 is a perspective view showing a state where the knob and the inner spring according to the present invention are engaged,
Fig. 6 is a sectional view of Fig. 5,
7 is an assembly view of a one-touch automatic reinforcing coupler according to the present invention, and Fig.
8 is a graph showing tensile strength test results of a one-touch automatic reinforcing coupler according to the present invention at the Korea Chemical Fusion Test Institute (May 25, 2015).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout the specification. The embodiments described herein will be described in detail with reference to the drawings of the present invention, such as a perspective view, an incision view, an assembly view and the like.

Hereinafter, a one-touch automatic reinforcing coupler according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view illustrating a shape in which a reinforcing bar is inserted with a one-touch automatic reinforcing coupler according to a preferred embodiment of the present invention. FIG. 2 is a cutaway view of FIG. 1, Fig. 5 is a perspective view showing a state in which a coupling body and an inner spring are engaged with each other. Fig. 6 is a cross-sectional view of the coupler body, And FIG. 7 is an assembled view of the one-touch automatic reinforcing coupler according to the present invention, respectively.

The one-touch automatic reinforcing coupler according to the preferred embodiment of the present invention includes a pair of coupler bodies 100, a fixture 200, an O-ring 300, an inner spring 400, an outer spring 500, 600).

First, the pair of coupler bodies 100 are composed of a first coupler body 110 and a second coupler body 120. The first coupler body 110 and the second coupler body 120 are opposed to each other And are coupled to each other by the male thread 112 and the female thread 122 formed at the end portions to form one coupler body 100. In this embodiment, they are mutually coupled by screwing, but may alternatively be welded or joined together using other fastening means known in the art.

The first coupler body 110 is made of a hard metal material and has a hollow member 114 formed therein so as to open upward and downward. The hollow portion 114 is formed at its upper end with a tapered portion 116 formed so as to have an inner diameter larger toward the inner side in the axial direction from the outer side.

In addition, the second coupler body 120 is made of a hard metal similar to the first coupler body 110, and is formed of a tubular member having a hollow portion 124 opened upward and downward. The hollow portion 124 has a tapered portion 126 formed at an upper end thereof so as to have an inner diameter smaller toward the inner side in the axial direction from the outer side.

 Referring to FIGS. 5 and 6, the fixture 200 is made of a hard metal material and is made of at least two pieces. The inclined surface 210 corresponding to the tapered portions 116 and 126 is formed on the inside of each of the first coupler body 110 and the second coupler body 120 so as to be movable along the axial direction . That is, the inclined surface 210 is formed in the body 200 so that the inner diameter becomes smaller toward the lower side in the axial direction.

When the reinforcing bars 1 and 1 'are inserted into the hollow portions 114 and 124 through both ends of the first coupler body 110 and the second coupler body 120, A plurality of ratchet protrusions 220 are formed which are supported by the mating protrusions M and the rib protrusions R of the first and second protrusions 1, 1 'to prevent the reinforcing bars 1, 1' from being detached by the wedge action. Here, the ratchet protrusions 220 are preferably arranged such that the distance between the protrusions is equal to or less than 1/2 of the minimum spacing of the pitch of the protrusions M, which is the nominal dimension of the rebars 1, 1 '. This is because the ratchet projection 220 of the knob 200 is disposed in the concave portion between the nodal projections M to firmly hold the nodal projection M. [ If the ratio is more than 1/2, the ratchet projection 220 rides up on the nodal projection M, and there is no place where the ratchet projection 220 is disadvantageous in tensile force.

In addition, an O-ring receiving groove 230 is further formed on an outer surface of the body 200. [

5 and 6, the O-ring 300 is made of an elastic rubber material and is inserted into the O-ring receiving groove 230 of the body 200 to receive the O-ring receiving groove 230 of the body 200 So as to closely contact the plurality of fixtures 200 in the axial direction.

The inner spring 400 is connected to the inner surface of the plurality of the fixtures 200 so that one upper end of the inner spring 400 is closely contacted to the plurality of fixtures 200 by the O- So as to extend in the outward direction in the axial direction. Here, it is preferable that the upper end 410 of the inner spring 400 is manufactured without a pitch as shown in the drawing. This shape increases the verticality of the plurality of knobs 200 contacting the upper end 410 of the inner spring 400.

In addition, the inner spring 400 acts to exert an elastic force to push the incoming reinforcing bars 1,1 'from the inside to the outside in the axial direction. Particularly, the reinforcing bars 1,1' The inner spring 400 that has exited from the bracket 200 pushes the one end face of the reinforcing bar 1,1 'with a restoring force by a compressed force and slips the reinforcing bars 1,1' It eliminates the phenomenon. This initial slip phenomenon plays an important role in the field test, and it is most desirable to set the state to zero as much as possible.

The outer springs 500 are supported on one side of the plurality of fixtures 200 to exert an elastic force to push the fixtures 200 from the inner side to the outer side in the axial direction. That is, the outer springs 500 are formed by the repulsive force against the elastic force when the first coupler body 110 and the second coupler body 120 are coupled with each other, To the extent that it is possible.

At this time, since the inner spring 400 is positioned inside the plurality of knobs 200, the plurality of knobs 400 are pushed up to the maximum diameter of the inner spring 400 . Accordingly, since the inner spring 400 is interposed in the plurality of the assemblies 200, the space for accommodating the reinforcing bars 1, 1 'is maintained.

The elastic force of the inner spring 400 is transmitted to one end portion of the reinforcing bar 1,1 'drawn into the hollow portion 114 of the first coupler body 110 or the hollow portion 124 of the second coupler body 120, The elastic force of the outer spring 500 pushes up the plurality of the knobs 200 and the ratchet projection 200 of the knob 200 and the nodule protrusion of the reinforcing bar 1,1 ' (M) and the rib projection (R).

Therefore, the elastic force of the outer spring 500 must be greater than the elastic force of the inner spring 400 in order to withstand the upward and downward tensile forces, which are the main functions of the reinforcing coupler. As a result of the elastic force, the outer spring 500 pushes up the plurality of fixtures 200, and applies a force to the side portions of the reinforcing bars.

Therefore, when the reinforcing bar 1,1 'is drawn into the hollow portion 114 of the first coupler body 110 or the hollow portion 124 of the second coupler body 120, the inner spring 400 And at the same time, a space in which the inner spring 400 is missing is generated. The outer springs 500 apply an elastic force to the plurality of assemblies 200 and simultaneously the insertion of the reinforcing bars 1,1 ' As shown in FIG.

The inner spring 400 and the outer spring 500 may be made of a high-elasticity plate spring, a compression coil spring, or the like, preferably a compression coil spring. Further, the inner diameter of the outer spring 500 is larger than the outer diameter of the inner spring 400.

The circular diaphragm 600 is made of a hard metal material and has a circular plate shape. The circular diaphragm 600 is disposed between the outer springs 500 installed inside the first coupler body 110 and the second coupler body 120 so that the entanglement between the outer springs 500, It serves to prevent interference.

The one-touch automatic reinforcing coupler according to the preferred embodiment of the present invention is assembled as follows.

7A and 7B, an inner spring 400 is disposed between a plurality of assemblies 200 and is bundled with an O-ring 300 along the O-ring receiving groove 230, .

7 (c), when the assembled bodies 200 thus integrally bundled are freely dropped into the first coupler body 110 and the second coupler body 120, the first coupler body 110 The inclined surface 210 of the fixture 200 is equally disposed and inserted into the tapered portion 116 of the second coupler body 120 and the tapered portion 126 of the second coupler body 120.

Then, as shown in Fig. 7 (d), the outer spring 500 is placed on the bottom surface of each of the assemblies 200. Then, as shown in Fig. A circular diaphragm 600 is placed between the outer spring 510 of the first coupler body 110 and the outer spring 520 of the second coupler body 120.

7 (e), the male screw portion 112 of the first coupler body 110 and the female screw portion 122 of the second coupler body 120 are screwed together to complete assembly, and as shown in Fig. 7 (1, 1 ') can be connected as shown in (f).

The internal state of the one-touch automatic reinforcing coupler according to the present invention completed as above is as follows.

The outer springs 500 can be moved in the pulling direction of the reinforcing bars 1,1 'by the repulsive force against the elastic force when the first coupler body 110 and the second coupler body 120 are screwed together Give it as much as possible. Since the inner springs 400 are positioned inside the plurality of fixtures 200, the hollow portion 114 of the first coupler body 110 and the second coupler body 120 (1, 1 ') in the hollow portion 124 of the reinforcing bar 1, 1'.

The one-touch automatic reinforcing coupler of the present invention assembled as described above works as follows.

The reinforcing bars 1, 1 'are inserted through the upper and lower ends of the hollow portions 114, 124 of the pair of coupler bodies 100. When the inner spring 400 is pushed by the pulling force of the initial reinforcing bar 1,1 'when the reinforcing bars 1,1' are inserted into the hollow portions 114 and 124 of the coupler body 100, (200). ≪ / RTI > The plurality of fixtures 200 are pushed up along the tapered portions 116 and 126 of the coupler body 100 by the outer springs 500.

Therefore, when the plurality of fixtures 200 are broken due to the elastic force of the outer spring 500 and the compressive force of the O-ring 300, the ratchet protrusions 220 of the fixtures 200 are inserted into the side surface of the reinforcing bar 1,1 ' And firmly grips the ribs R and the nodules M of the reinforcing bars. That is, as the tensile force is applied to the reinforcing bars 1,1 ', the inclined surfaces 210 of the brackets 200 along the tapered portions 116 and 126 of the coupler body 100 act as wedges to pull the reinforcing bars 1,1' The more you pull, the more power you get. At this time, since the ratchet protrusions 220 of the plurality of assemblies 200 hold the sides of the reinforcing bars 1,1 ', the verticality of the reinforcing bars 1,1' is eliminated.

According to the above-described one-touch automatic reinforcing coupler of the preferred embodiment of the present invention, loss of about 15% due to the conventional mechanical folding can be reduced, which is a factor for reducing the unit cost. can do. In addition, when assembling on-site, it is possible to improve work efficiency remarkably by working the reinforcing bars and reinforcing bars in a simple one-touch type instead of screwing the heavy reinforcing bars in a threaded shape, thereby significantly reducing the connection time of the reinforcing bars, Effect.

On the other hand, if the threaded type coupler of a conventional screw type is broken at a construction site, if both screw parts are cut and the cut part is replaced with a one-touch type automatic reinforcing coupler, serious problems There is also an advantage that can be solved. In addition, since the volume of the reinforcing coupler is reduced, the coupler can be slimmed to satisfy the concrete covering thickness of the reinforced concrete structure.

Hereinafter, the tension test and results of the one-touch automatic reinforcing coupler according to the present invention will be described.

8 is a graph showing tensile strength test results of a one-touch automatic reinforcing coupler according to the present invention at the Korea Chemical Fusion Test Institute (May 25, 2015).

Referring to FIG. 8, in order to quantitatively confirm the material (SM45C) of a steel material applied as a reinforcing coupler, a tensile test was conducted on a reinforcing bar coupled with a reinforcing coupler.

Tensile tests were carried out on KS specimens by connecting reinforcing couplers to ultra-high-strength bars with a yield strength of 400 MPa or more and a rebar diameter of D25 (25 mm).

The tensile test was carried out by the Korea Testing and Research Institute (KTR), and the results were as follows.

In this case, the mechanical joints shall not break at more than 125% of the yield strength of the reinforcing bars to be connected (Section 8.6.1 (3) ① of the structural design standard) and shall not be broken before the reinforcing bars (KS D 0249) .

Therefore, as shown in FIG. 8, it was found that a tensile strength of 617 MPa (154% of the yield strength) exceeding 125% or more than the tensile strength of the base material yield point (500 MPa) was obtained according to the unidirectional tensile test results.

The present invention is a one-touch type automatic reinforcing coupler designed to prevent the initial slip phenomenon and is designed to have an economical shape while satisfying the mechanical properties required on criteria such as tensile strength. The high strength large- It is a useful invention that can be more efficient when applied to a member having a large structural strength such as a high-level column, a core wall, or an out-rigger in which a horizontal force and a compressive force are largely generated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

1,1 '. Rebar 100. Coupler body
110. Coupler body 112. Male threads
114. Hollow portion 116. Taper portion
120. Second coupler body 122. Female thread portion
124. Hollow part 126. Taper part
200. Arrangement 210. Slope
220. Ratchet projection 230. O-ring receiving groove
300. O-ring 400. Inside spring
410. Upper part 500. Outer spring
600. Circular diaphragm

Claims (4)

A hollow portion 114 and a hollow portion 114 formed at both ends of the hollow portion 114 and 124 and a tapered portion 116 and 126 formed at an upper end of the hollow portion 114 and 124 so as to have an inner diameter larger toward the inner side in the axial direction, 100);
The inclined surface 210 and the O-ring receiving groove 230 corresponding to the tapered portions 116 and 126 are formed on the outer side of the inside of the coupler body 100, (200) having a plurality of ratchet protrusions (220) which are supported while being supported by the protrusions of the ratchet protrusion (220) of the ratchet protrusion (220).
An O-ring 300 inserted into the O-ring receiving groove 230 to closely contact the plurality of knobs 200 in the axial direction;
And an upper end of the one side is closely contacted to the plurality of the bodies 200 by the O-ring 300 so that the plurality of the bodies 200 can be inserted into the plurality of the bodies 200 without interference An inner spring 400 that pushes down after being pulled by the inserted reinforcing bar and applies an elastic force to contact the circular diaphragm 600 to push the reinforcing bar from the inner side in the axial direction outward;
An outer spring (500) supported on a bottom surface of the plurality of fixtures (200) and exerting an elastic force to push the plurality of fixtures (200) outwardly in the axial direction from the inner side; And
And a circular diaphragm (600) disposed between the outer springs (500) to prevent entanglement and interference between the outer springs (500)
The flexible body 200 and the inner spring 400 do not move and the reinforcing bars contact the inner spring 400. When the inner spring 400 is depressed, the inner spring 400 is disengaged from the fixture 200, The inner spring 200 is pressed by the outer spring 500 to come into close contact with the reinforcing bar and the inner spring 400 is supported by the circular diaphragm 600 and the elastic force pushing the inner spring outward in the axial direction is applied to the reinforcing bars, To prevent an initial slip when the torsion bar is pulled.
[2] The apparatus of claim 1, wherein the coupler body (100)
A tapered portion 116 formed at an upper end of the hollow portion 114 so as to have an inner diameter larger toward the inner side in the axial direction from the outer side; A first coupler body 110 having a male thread 112 at the bottom of its outer surface;
A female screw part 122 formed on an inner side surface of the hollow part 124 to be screwed to the male screw part 112 of the first coupler body 110 at an upper end of the hollow part 124, , And a second coupler body (120) having a tapered portion (126) extending from the female threaded portion (122) and formed to have a smaller inner diameter toward the lower side in the axial direction.
2. The device of claim 1, wherein the inner spring (400)
Wherein an upper end portion (410) which is in contact with the fixture (200) is manufactured without a pitch.
The method according to claim 1,
Wherein an inner diameter of the outer spring (500) is larger than an outer diameter of the inner spring (400).
KR1020150071445A 2015-05-22 2015-05-22 One-touch type steel reinforcing coupler KR101643846B1 (en)

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KR101714329B1 (en) * 2016-09-30 2017-03-09 전영철 Coupler for connecting reinforcing rod
KR20190016838A (en) 2017-08-09 2019-02-19 삼성물산 주식회사 Coupler guide for jointing iron bar
KR101959076B1 (en) * 2018-12-27 2019-03-15 배영재 A rebar coupler
KR20200000940A (en) 2018-06-26 2020-01-06 현성주 Coupler For Rebar Connect
CN111321847A (en) * 2020-01-02 2020-06-23 中国一冶集团有限公司 Combined connecting mechanism
CN111472498A (en) * 2020-04-23 2020-07-31 陶闻钟 Self-holding steel bar connector
KR20200092699A (en) 2019-01-25 2020-08-04 한봉희 Rebar coupler
US10760272B2 (en) 2018-06-04 2020-09-01 Yang Oun LEE Rebar coupler
KR20200125848A (en) 2019-04-26 2020-11-05 최진열 One-touch type reinforced coupler
KR102189193B1 (en) 2020-04-07 2020-12-09 김한규 A coupler for connecting reinforcing bar
KR102396003B1 (en) 2021-08-27 2022-05-09 이남융 One-touch type reinforcing bar coupler and its manufacturing method
KR102563615B1 (en) 2022-11-29 2023-08-03 방복남 Rebar connection method using one-piece coupler

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KR20060067060A (en) * 2004-12-14 2006-06-19 오원석 The steel frame the system which it connects
KR100953941B1 (en) * 2009-09-09 2010-04-21 김병섭 Reinforcing bar coupler
KR101519471B1 (en) * 2014-12-10 2015-05-13 (주)코스잭 High Strength One-touch Quick-coupler for Connecting Reinforcing Rods Having Various Rib Shapes

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KR101714329B1 (en) * 2016-09-30 2017-03-09 전영철 Coupler for connecting reinforcing rod
KR20190016838A (en) 2017-08-09 2019-02-19 삼성물산 주식회사 Coupler guide for jointing iron bar
US10760272B2 (en) 2018-06-04 2020-09-01 Yang Oun LEE Rebar coupler
KR20200000940A (en) 2018-06-26 2020-01-06 현성주 Coupler For Rebar Connect
KR101959076B1 (en) * 2018-12-27 2019-03-15 배영재 A rebar coupler
CN113227511A (en) * 2018-12-27 2021-08-06 裵荣在 Reinforcing bar coupler
WO2020138594A1 (en) * 2018-12-27 2020-07-02 배영재 Rebar coupler
KR20200092699A (en) 2019-01-25 2020-08-04 한봉희 Rebar coupler
KR20200125848A (en) 2019-04-26 2020-11-05 최진열 One-touch type reinforced coupler
CN111321847A (en) * 2020-01-02 2020-06-23 中国一冶集团有限公司 Combined connecting mechanism
KR102189193B1 (en) 2020-04-07 2020-12-09 김한규 A coupler for connecting reinforcing bar
CN111472498A (en) * 2020-04-23 2020-07-31 陶闻钟 Self-holding steel bar connector
KR102396003B1 (en) 2021-08-27 2022-05-09 이남융 One-touch type reinforcing bar coupler and its manufacturing method
KR102563615B1 (en) 2022-11-29 2023-08-03 방복남 Rebar connection method using one-piece coupler

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