KR102248293B1 - Rebar coupler - Google Patents

Abstract

The present invention relates to a rebar coupler which easily and firmly connects two eccentric rebars and comprises: a first eccentric member connected to a first rebar; a second eccentric member connected to a second rebar; and a coupling nut connecting the first eccentric member and the second eccentric member. The first eccentric member and the second eccentric member comprise a first fastening hole and a second fastening hole eccentrically arranged from each central shaft thereof at a predetermined distance. The first fastening hole and the second fastening hole are opened to a lateral side to allow the first rebar and the second rebar to be inserted thereto. The rebar coupler can comprise a first insertion wedge and a second insertion wedge inserted into each hollow portion of the first rebar and the second rebar.

Description

Rebar coupler {REBAR COUPLER}

The present invention relates to a reinforcing bar coupler, and to a reinforcing bar coupler capable of simply and firmly connecting two reinforcing bars that are eccentric to each other.

Reinforcing bars are widely used in reinforced concrete structures such as buildings and bridges. In the case of buildings or bridges, it is common for the reinforcing bars to be oriented long along the longitudinal direction of the structure. Therefore, preferably, it is most advantageous to reinforce the reinforcing bar corresponding to the length of the structure in the field.

However, due to problems such as manufacturing and transportation of reinforcing bars, reinforcing bars are provided to the site in a form cut to a certain length. Therefore, in the field, the work of arranging two reinforcing bars in a row in the longitudinal direction and connecting them is performed. However, depending on the site, the two reinforcing bars to be connected to each other may not be aligned in a line along the longitudinal direction, but are offset from each other and are eccentrically disposed.

Even in this case, in order to facilitate the work of connecting the reinforcing bars, various types of reinforcing bar couplers have been developed.

Chinese Patent Registration CN 105756289 B, Patent Publication CN 11637127 A, Korean Patent Registration No. 1606576, No. 1906354, Patent No. 2010-9774, etc. disclose a reinforcing bar coupler structure capable of connecting two eccentrically arranged reinforcing bars. However, this has a problem that it cannot flexibly respond to various eccentric distances of two reinforcing bars, and it cannot be used when connecting two reinforcing bars without eccentricity. In addition, they have a problem that the structure is complex, the connection strength is not guaranteed, and the connection process is also not simple.

Chinese Patent Laid-Open Publication No. CN 11025895 A discloses a reinforcing bar coupler structure that connects two reinforcing bars that are not arranged in a line and meet at an angle by a predetermined angle. However, this is difficult to apply when the two reinforcing bars do not meet at an angle and only have an eccentricity, and there is a problem that the bending stiffness decreases significantly at the connection part of the two reinforcing bars. In addition, the connection process is also not simple.

The present invention has been conceived to solve the above-described problem, and it is an object of the present invention to provide a reinforced coupler that can flexibly respond to various eccentric distances, is applicable, is easy to connect, and has a solid connection structure.

In order to solve the above-described problems, the present invention provides a reinforcing bar coupler for connecting a first reinforcing bar disposed on one side in the longitudinal direction and a second reinforcing bar disposed at the other side in the longitudinal direction in the longitudinal direction.

The first and second reinforcing bars may have the same shape. For example, the first and second reinforcing bars may have the same outer diameter.

The first reinforcing bar may have a first male thread formed on its outer circumferential surface.

The second reinforcing bar may have a second male thread formed on its outer circumferential surface.

The first male thread and the second male thread may have the same direction and the same shape.

The first reinforcing bar may have a long pipe shape in a longitudinal direction. That is, the first reinforcing bar may be provided with a first hollow part along its longitudinal direction.

The second reinforcing bar may have a long pipe shape in the longitudinal direction. That is, the second reinforcing bar may be provided with a second hollow part along its longitudinal direction.

The first hollow portion and the second hollow portion may have the same shape. The first hollow portion and the second hollow portion may correspond to each other or may have circular cross-sections having the same diameter.

The reinforcing bar coupler includes a first eccentric member connected to the first reinforcing bar, a second eccentric member connected to the second reinforcing bar, and a coupling nut connecting the first eccentric member and the second eccentric member.

The first eccentric member may have a first fastening hole in which a first male screw thread is formed to be screwed with a first male thread formed on the outer circumferential surface of the first reinforcing bar. The first fastening hole may be eccentrically arranged by a first distance from the central axis of the first eccentric member.

The second eccentric member may include a second fastening hole in which a second male thread is formed and a second female thread is screwed to the second male thread formed on the outer circumferential surface of the second reinforcing bar. The second fastening hole may be eccentrically arranged by a second distance from the central axis of the second eccentric member.

The first distance and the second distance may correspond or be the same.

The coupling nut has a shape extending in the longitudinal direction. A first coupling section engaged with the first eccentric member may be provided at one side of the coupling nut in the longitudinal direction. A second coupling section engaged with the second eccentric member may be provided on the other side of the coupling nut in the longitudinal direction.

On the outer circumferential surface of the coupling nut, for example, a hexagonal nut shape may be provided to promote rotation of the coupling nut.

The reinforcing bar coupler may further include a first insertion wedge fitted into the first hollow portion of the first reinforcing bar.

The reinforcing bar coupler may further include a second insertion wedge fitted into the second hollow portion of the second reinforcing bar.

The first insertion wedge may include a first wedge portion inserted into the first hollow portion of the first reinforcing bar, and a first head portion connected to an end of the first wedge portion.

The first wedge portion may have a section whose cross-section becomes narrower as it extends in the longitudinal direction from the first head portion.

The outer diameter of at least a portion of the lengthwise direction of the first wedge portion may be larger than the inner diameter of the first hollow portion.

The first head portion may have a cross-section larger than that of the first wedge portion.

The first wedge portion may be eccentrically arranged by a third distance from the center of the first head portion.

The bottom surface of the first head portion may face the surface of the first eccentric member.

The first head portion may have a cross-section corresponding to or smaller than the surface of the first eccentric member.

The second insertion wedge may include a second wedge portion inserted into the second hollow portion of the second reinforcing bar, and a second head portion connected to an end of the second wedge portion.

The second wedge portion may have a section whose cross-section becomes narrower as it extends in the longitudinal direction from the second head portion.

The outer diameter of at least a portion of the lengthwise direction of the second wedge portion may be larger than the inner diameter of the second hollow portion.

The second head portion may have a cross-section larger than that of the second wedge portion.

The second wedge portion may be eccentrically disposed by a fourth distance from the center of the second head portion.

The third distance and the fourth distance may be the same or may correspond to each other.

The bottom surface of the second head portion may face the surface of the second eccentric member.

The second head portion may have a cross-section corresponding to or smaller than the surface of the second eccentric member.

The shapes of the first wedge and the second wedge may correspond to each other or may be the same.

A surface of the first head and a surface of the second head may face and contact each other in a longitudinal direction.

As the reinforcing bar coupler is fastened, when the first wedge and the second wedge are respectively pressed into the first hollow portion of the first reinforcing bar and the second hollow portion of the second reinforcing bar, the diameters of the first reinforcing bar and the second reinforcing bar expand. The first male thread of the first reinforcing bar is strongly fastened and fixed to the first female thread of the first eccentric member, and the second male thread of the second reinforcing bar is strongly fastened and fixed to the second female thread of the second eccentric member. Accordingly, the first and second reinforcing bars are strongly connected and fixed to the first eccentric member and the second eccentric member, respectively.

The first fastening hole may have a shape opened to the side of the first eccentric member. Accordingly, the first reinforcing bar can be inserted into the first fastening hole through the opened side.

The second fastening hole may have a shape opened to the side of the second eccentric member. Accordingly, the second reinforcing bar can be inserted into the second fastening hole through the opened side.

This remarkably simplifies the fastening work between the eccentric member and the reinforcing bar in the field.

The outer circumferential surface of the first eccentric member includes a wedge outer circumferential surface whose cross section gradually decreases toward one side in the longitudinal direction, and an inner circumferential surface of the first coupling section of the coupling nut is complementary to the wedge outer circumferential surface so as to be engaged with the wedge outer circumferential surface. It may include a wedge-shaped inner peripheral surface.

At one end of the first coupling section in the longitudinal direction, a stepped jaw having an inner diameter reduced may be provided. The stepped jaw may regulate a depth into which the first eccentric member is inserted into the first coupling section.

The outer circumferential surface of the second eccentric member may have a third male thread formed in the first direction, and the inner circumferential surface of the second coupling section of the coupling nut may have a third female thread screwed to the third male thread. have.

Then, as the second eccentric member and the coupling nut are fastened, the second eccentric member may press-fit the first eccentric member to one side in the length direction. Then, the first coupling section of the first eccentric member and the coupling nut can be strongly wedge-coupled, and the first wedge and the second wedge are combined with the first hollow portion of the first reinforcing bar and the second hollow portion of the second reinforcing bar. Each can be forced in.

This coupling structure can apply pretensioning to the first and second reinforcing bars.

Meanwhile, the outer circumferential surface of the first eccentric member and the inner circumferential surface of the coupling nut may be configured differently from the above. For example, the outer circumferential surface of the first eccentric member has a fourth male thread formed in the second direction, and the inner circumferential surface of the first coupling section of the coupling nut is a fourth female thread screwed to the fourth male thread. It can be provided.

The first direction and the second direction may be the same direction. Additionally, the third male thread and the fourth male thread may have the same or corresponding standards. Also, the first eccentric member and the second eccentric member may have the same or corresponding standards. Then, the first eccentric member, the second eccentric member, and the coupling nut have no directionality, so that workers in the field can easily perform rebar connection work.

This coupling structure makes it possible to connect the two reinforcing bars without applying tension to the first reinforcing bar and the second reinforcing bar.

Unlike this, the first direction and the second direction may be different. That is, it may be in the opposite direction. For example, the third male thread may be a right-hand thread, but the fourth male thread may be a left-hand thread. Additionally, the third male thread and the fourth male thread may be configured to have different pitches and leads in addition to the thread direction. In addition, the outer diameters of the first eccentric member and the second eccentric member may be different. Then, direction is given to the first eccentric member, the second eccentric member, and the coupling nut, but the dimensions of the parts to which the parts are connected are significantly different, so workers at the site can easily check the directionality and perform rebar connection work. have.

This coupling structure can apply pretensioning to the first and second reinforcing bars.

The pitch or lead of the fourth male thread of the first eccentric member may correspond to the pitch or lead of the first male thread of the first reinforcing bar. And as the first reinforcing bar is fitted into the first fastening hole of the first eccentric member, in a state in which the first male thread of the first reinforcing bar is engaged with the first female thread of the first fastening hole, The substantially outer circumferential surface may have a shape inscribed with the substantially outer circumferential surface of the first eccentric member. Then, the fourth male thread and the first male thread may be screwed together with the fourth female thread of the first coupling section of the coupling nut.

The pitch or lead of the third male thread of the second eccentric member may correspond to the pitch or lead of the second male thread of the second reinforcing bar. And as the second reinforcing bar is fitted into the second fastening hole of the second eccentric member, the second male thread of the second reinforcing bar is engaged with the second female thread of the second fastening hole. The substantially outer circumferential surface may have a shape inscribed with the substantially outer circumferential surface of the second eccentric member. Then, the third male thread and the second male thread may be screwed together with the third female thread of the second coupling section of the coupling nut.

According to the reinforcing bar coupler of the present invention, a reinforcing bar coupler can be applied to flexibly respond to various eccentric distances.

According to the reinforced coupler of the present invention, the structure of the reinforced coupler is simple, the connection operation is very simple, and the connection strength is very high.

In addition to the above-described effects, specific effects of the present invention will be described together with explanation of specific matters for carrying out the present invention.

1 is an exploded perspective view of a first embodiment of a reinforcing bar coupler according to the present invention.
2 is a cross-sectional perspective view showing a cross section along the longitudinal direction in FIG. 1.
3 is a view showing a state in which the parts of FIG. 1 are assembled.
4 is a cross-sectional perspective view showing the cross section of FIG. 3.
5 is a cross-sectional view showing the cross-section of FIG. 4.
6 is an exploded perspective view of a second embodiment of a reinforcing bar coupler according to the present invention.
7 to 10 are perspective views each showing an assembly process of the reinforcing bar coupler of FIG. 6 according to the sequence thereof.
11 is a cross-sectional view showing a cross section along the longitudinal direction in FIG. 10.
12 is a cross-sectional view showing a cross section perpendicular to the longitudinal direction in FIG. 10.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, but various modifications may be made and may be implemented in various different forms. However, this embodiment is provided to complete the disclosure of the present invention and to fully inform a person of ordinary skill in the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, and all changes and equivalents included in the technical spirit and scope of the present invention as well as substituting or adding to each other the constitution of one embodiment and the constitution of another embodiment. To include substitutes.

The accompanying drawings are only for making it easier to understand the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention It should be understood to include water or substitutes. In the drawings, components may be expressed exaggeratedly large or small in size or thickness in consideration of convenience of understanding, etc., but this will not limit the scope of the present invention to be interpreted.

The terms used in this specification are only used to describe specific embodiments or examples, and are not intended to limit the present invention. And expressions in the singular include plural expressions, unless the context clearly indicates otherwise. In the specification, terms such as to include or consist of are intended to designate the existence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification. In other words, in the specification, terms such as to include, to consist of. It is to be understood that it does not preclude the possibility of the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

Terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

When an element is referred to as being “above” or “being below” another element, it should be understood that not only is disposed directly above the other element, but also other elements may exist in the middle. .

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

<First Example>

Hereinafter, a reinforcing bar coupler of the first embodiment will be described with reference to FIGS. 1 to 5.

The reinforcing bar coupler 10 of the first embodiment connects the first reinforcing bar 81 disposed on one side in the longitudinal direction and the second reinforcing bar 82 disposed at the other side in the longitudinal direction in the longitudinal direction. The first reinforcing bar 81 may have a first male thread 811 formed on its outer circumferential surface, and the second reinforcing bar 82 may have a second male thread 821 formed on its outer circumferential surface.

The first reinforcing bar 81 and the second reinforcing bar 82 may have a long pipe shape in a longitudinal direction. That is, a first hollow portion 812 and a second hollow portion 822 may be provided in the first reinforcing bar 81 and the second reinforcing bar 82 along the longitudinal direction, respectively.

Here, the first reinforcing bar 81 and the second reinforcing bar 82 may have the same shape. For example, the first reinforcing bar 81 and the second reinforcing bar 82 have the same outer diameter, the first male screw thread 811 and the second male screw thread 821 have the same direction and the same shape, and the first hollow The shape of the portion 812 and the shape of the second hollow portion 822 may be the same. The first hollow portion 812 and the second hollow portion 822 may correspond to each other or may have a circular cross section having the same diameter.

The reinforcing bar coupler 10 includes a first eccentric member 20 connected to the first reinforcing bar 81, a second eccentric member 30 connected to the second reinforcing bar 82, and the first hollow of the first reinforcing bar 81. The first insertion wedge 50 fitted into the portion 812, the second insertion wedge 60 fitted into the second hollow portion 822 of the second reinforcing bar 82, and the first eccentric member 20 It includes a coupling nut 40 connecting the two eccentric members 30.

The first eccentric member 20 has a first fastening hole 21. On the inner circumferential surface of the first fastening hole 21, a first female thread 211 screwed to the first male thread 811 of the first reinforcing bar 81 is formed. The first fastening hole 21 may be eccentrically arranged by a first distance from the central axis of the first eccentric member 20.

Likewise, the second eccentric member 30 also has a second fastening hole 31. On the inner circumferential surface of the second fastening hole 31, a second female thread 311 is formed to be screwed with the second male thread 821 of the second reinforcing bar 82. The second fastening hole 31 may be eccentrically arranged by a second distance from the central axis of the second eccentric member 30.

The first distance and the second distance may correspond or be the same. That is, the degree of eccentricity of the two fastening holes with respect to the centers of the two eccentric members may be the same. Accordingly, the rebar coupler of the present invention can be flexibly applied to various eccentric distances that may exist between two reinforcing bars to be connected to each other by adjusting the distance between the two fastening holes by varying the angular displacement of the two eccentric members.

The coupling nut 40 has a shape extending in the longitudinal direction. A first coupling section 41 meshed with the first eccentric member 20 may be provided at one side of the coupling nut 40 in the longitudinal direction. A second coupling section 42 meshed with the second eccentric member 30 may be provided on the other side of the coupling nut 40 in the longitudinal direction.

Although not shown, the outer circumferential surface of the coupling nut 40 may be provided with a deformed surface shape, for example, a hexagonal nut shape in order to promote rotation of the coupling nut. This shape also increases the bonding strength to concrete.

The first insertion wedge 50 includes a first wedge portion 51 inserted into the first hollow portion 812 of the first reinforcing bar 81 and a first wedge portion 51 connected to the end of the first wedge portion 51. One head portion 52 may be provided.

The first wedge portion 51 may have a section whose cross-section becomes narrower as it extends from the first head portion 52 in the longitudinal direction. The outer diameter of at least a portion of the lengthwise direction of the first wedge portion 51 may be larger than the inner diameter of the first hollow portion 812. In the embodiment, the first wedge portion 51 starts to form a truncated cone shape.

The first head portion 52 may have a cross-section larger than that of the first wedge portion 51. The first head portion 52 may have a disk shape as shown.

The first wedge portion 51 may be eccentrically disposed by a third distance from the center of the first head portion 52.

In the assembled state of the reinforced coupler, the bottom surface of the first head portion 52 may face the surface of the first eccentric member 20.

The first head portion 52 may have a cross-section corresponding to or smaller than the surface of the first eccentric member 20. In the embodiment, it is exemplified that the first head portion 52 has a disk shape slightly smaller than the surface of the first eccentric member 20.

The second insertion wedge 60 is also connected to a second wedge portion 61 inserted into the second hollow portion 822 of the second reinforcing bar 82 and an end portion of the second wedge portion 61 A second head portion 62 may be provided.

The second wedge part 61 may have a section whose cross section becomes narrower as it extends from the second head part 62 in the longitudinal direction. The outer diameter of at least a portion of the lengthwise direction of the second wedge portion 61 may be larger than the inner diameter of the second hollow portion 822. In the embodiment, the second wedge portion 61 is started to form a truncated cone shape.

The second head portion 62 may have a cross-section larger than that of the second wedge portion 61. The second head portion 62 may have a disk shape as shown.

The second wedge portion 61 may be eccentrically disposed by a fourth distance from the center of the second head portion 62.

In the assembled state of the reinforced coupler, the bottom surface of the second head portion 62 may face the surface of the second eccentric member 30.

The second head portion 62 may have a cross-section corresponding to or smaller than the surface of the second eccentric member 30. In the embodiment, it is exemplified that the second head portion 62 has a disk shape slightly smaller than the surface of the second eccentric member 30.

The shapes of the first insertion wedge 50 and the second insertion wedge 60 may correspond to each other or may be the same. In other words, the distinction between the two wedges is meaningless, and can be configured so that they are not separated.

In the process of assembling the reinforced coupler 10, the surface of the first head portion 52 and the surface of the second head portion 62 may face each other in the longitudinal direction and contact each other.

The outer circumferential surface of the first eccentric member 20 may include a wedge outer circumferential surface 22 whose cross-section gradually decreases toward one side in the longitudinal direction in at least a partial section in the longitudinal direction. In the embodiment, the first eccentric member 20 exemplifies a shape in which the entire length direction forms the wedge outer circumferential surface 22, that is, substantially forms a truncated cone shape.

The inner circumferential surface of the first coupling section 41 of the coupling nut 40 may include a wedge inner circumferential surface 411 forming a shape complementary to the wedge outer circumferential surface 22 so as to engage with the wedge outer circumferential surface 22. have. In addition, at one end of the first coupling section 41 in the longitudinal direction, a stepped jaw having an inner diameter reduced as shown may be provided. The stepped jaws may regulate a depth at which the first eccentric member 20 is inserted from the other side in the length direction into the first coupling section 41 in one direction in the length direction.

The outer circumferential surface of the second eccentric member 30 may include a third male thread 32 formed in the first direction. In addition, the inner circumferential surface of the second coupling section 42 of the coupling nut 40 may include a third female thread 421 that is screwed with the third male thread 32.

As the coupling nut 40 is rotated to fasten the second eccentric member 30 and the coupling nut 40, the second eccentric member 30 moves the first eccentric member 20 to one side in the length direction. Can be press-fit. Then, the first coupling section 41 of the first eccentric member 20 and the coupling nut 40 is strongly wedge-coupled.

In addition, as the second eccentric member 30 presses the first eccentric member 20 by rotating the coupling nut 40, the head portions of the first insertion wedge 50 and the second insertion wedge 60 In contact with the first insertion wedge 50 and the second insertion wedge 60, the first hollow portion 812 of the first reinforcing bar 81 and the second hollow portion 822 of the second reinforcing bar 82, respectively. It is press-fit. Then, the inner diameter portion of the first reinforcing bar 81 and the second reinforcing bar 82 is firmly supported, and accordingly, the diameter of the first reinforcing bar 81 and the second reinforcing bar 82 substantially expands. The first male thread 811 of the first reinforcing bar 81 is strongly fastened and fixed to the first female thread 211 of the first eccentric member 20, and the second male thread 821 of the second reinforcing bar 82 is It is strongly fastened and fixed to the second female thread 311 of the second eccentric member 30.

As a result, when the connection of the reinforcing bar coupler 10 is completed, the ends of the first reinforcing bar 81 and the second reinforcing bar 82 are respectively the first insertion wedge 50 and the second insertion wedge 60 and the coupling nut It is interposed between (40), and it is strongly connected and fixed with them.

The coupling structure as in the first embodiment is, by rotating the coupling nut 40 to fasten the first reinforcing bar 81 and the second reinforcing bar 82, the first reinforcing bar 81 and the second reinforcing bar 82 By pulling in a direction closer to each other, pretensioning can be applied to the first reinforcing bar 81 and the second reinforcing bar 82.

If necessary, the first insertion wedge 50 and the second insertion wedge 60 may be omitted. In addition, a fourth male thread and a fourth female thread may be formed on the outer circumferential surface of the first eccentric member 20 and the inner circumferential surface of the first coupling section 41 of the coupling nut 40 as in the second embodiment to be described later. . In addition, the first fastening hole 21 and the second fastening hole 31 may be opened in a lateral direction. In addition to this, of course, various modifications, substitutions, combinations, and omissions are possible.

<Second Example>

Hereinafter, a reinforcing bar coupler of a second embodiment will be described with reference to FIGS. 6 to 12.

The second embodiment discloses a reinforcing bar coupler 10 connecting the first reinforcing bar 81 and the second reinforcing bar 82 to which the first and second hollow portions 812 and 822 are not formed, respectively. However, it goes without saying that the reinforcing bar coupler 10 of the second embodiment can be applied to a reinforcing bar in which a hollow part is formed.

It is disclosed that the two reinforcing bars exemplified in the second embodiment do not have a hollow portion, and thus, in contrast to the first embodiment, the rebar coupler 10 does not have an insertion wedge inserted into the hollow portion. However, when the reinforcing bar coupler 10 of the second embodiment is applied to a reinforcing bar in which a hollow portion is formed, of course, an insertion wedge may be additionally applied.

The reinforcing bar coupler 10 of the second embodiment includes a first eccentric member 20 connected to the first reinforcing bar 81, a second eccentric member 30 connected to the second reinforcing bar 82, and the first eccentric member. (20) and a coupling nut 40 connecting the second eccentric member (30).

The first eccentric member 20 has a first fastening hole 21. The first fastening hole 21 may be eccentrically arranged by a first distance from the central axis of the first eccentric member 20.

The first fastening hole 21 may have a shape that is open to the side. The opening in which the first fastening hole 21 is opened laterally has a width through which the first reinforcing bar 81 can enter and exit.

The inner circumferential surface of the first fastening hole 21 includes a first female thread 211 screwed with a first male thread 811 formed on the outer circumferential surface of the first reinforcing bar 81.

The second eccentric member 30 has a second fastening hole 31. The second fastening hole 31 may be eccentrically arranged by a second distance from the central axis of the second eccentric member 30.

The second distance may be the same as or correspond to the first distance.

The second fastening hole 31 may also be opened laterally. The opening in which the second fastening hole 31 is opened laterally has a width through which the second reinforcing bar 82 can enter and exit.

The inner circumferential surface of the second fastening hole 31 is provided with a second female thread 311 screwed with a second male thread 821 formed on the outer circumferential surface of the second reinforcing bar 82.

The coupling nut 40 has a shape extending in the longitudinal direction, and has a first coupling section 41 engaged with the first eccentric member 20 on one side in the longitudinal direction, and the second eccentric member on the other side. It has a second coupling section 42 engaged with (30).

Although not shown, as in the first embodiment, a shape for rotating the coupling nut may be provided on the outer circumferential surface of the coupling nut 40.

The first reinforcing bar 81 may be inserted into the first fastening hole 21 through the opened side of the first fastening hole 21, and the second reinforcing bar 82 is It may be inserted into the second fastening hole 31 through the opened side. This remarkably simplifies the fastening work between the eccentric member and the reinforcing bar in the field.

The outer circumferential surface of the second eccentric member 30 is provided with a third male thread 32 formed in the first direction, and the inner circumferential surface of the second coupling section 42 of the coupling nut 40 is the third male thread. A third female thread 421 that is screwed with 32 may be provided.

The outer circumferential surface of the first eccentric member 20 has a fourth male thread 23 formed in a second direction, and the inner circumferential surface of the first coupling section 41 of the coupling nut 40 is the fourth male thread. (23) It may be provided with a fourth female thread 412 that is screwed.

According to the second embodiment, outer diameters of the first eccentric member 20 and the second eccentric member 30 may correspond to each other, and the first direction and the second direction may be the same direction. In addition, the third male thread 32 and the fourth male thread 23 may have pitches or leads corresponding to each other. Then, since the first eccentric member 20, the second eccentric member 30, and the coupling nut 40 are not oriented, workers in the field can easily perform rebar connection work.

This coupling structure makes it possible to connect the two reinforcing bars without applying tension to the first and second reinforcing bars 81 and 82.

Unlike the illustrated second embodiment, the first direction and the second direction may be opposite directions. For example, the third male thread 32 may be a right-hand thread, and the fourth male thread 23 may be a left-hand thread. In this coupling structure, the coupling nut 40 is rotated while the first eccentric member 20 is engaged with the first coupling section 41 and the second eccentric member 30 is engaged with the second coupling section 42. As a result, the first eccentric member 20 and the second eccentric member 30 move in a direction closer to each other and may be fastened to the coupling nut 40. According to this, the first reinforcing bar 81 and the second reinforcing bar 82 are pulled in a direction closer to each other, so that pretensioning can be applied to the reinforcing bars.

Additionally, the third male thread 32 and the fourth male thread 23 may be configured to have different pitches and leads in addition to the thread direction. In addition, the outer diameters of the first eccentric member 20 and the second eccentric member 30 may be different. Then, direction is given to the first eccentric member 20, the second eccentric member 30, and the coupling nut 40, but the dimensions of the parts to which the parts are connected are clearly different, so that the workers in the field can easily change the direction. You can check and perform rebar connection work.

Meanwhile, the pitch or lead of the fourth male thread 23 of the first eccentric member 20 may correspond to the pitch or lead of the first male thread 811 of the first reinforcing bar 81. And inserting the first reinforcing bar 81 into the first fastening hole 21 of the first eccentric member 20, the first reinforcing bar ( In a state in which the first male threads 811 of 81) are engaged, a substantially outer circumferential surface of the first reinforcing bar 81 may be in a form that inscribes the substantially outer circumferential surface of the first eccentric member 20. Then, the fourth male thread 23 and the first male thread 811 may be screwed together with the fourth female thread 412 of the first coupling section 41 of the coupling nut 40. That is, the first male thread 811 of the first reinforcing bar 81 is also screwed with the first female thread 211 provided in the first fastening hole 21 of the first eccentric member 20, and the coupling nut It is also screwed into the fourth female thread 412 provided in the first coupling section 41 of (40). Accordingly, the first reinforcing bar 81 may be strongly bound to the reinforcing bar coupler 10.

In addition, the pitch or lead of the third male thread 32 of the second eccentric member 30 may correspond to the pitch or lead of the second male thread 821 of the second reinforcing bar 82. And inserting the second reinforcing bar 82 into the second fastening hole 31 of the second eccentric member 30, the second reinforcing bar ( In a state in which the second male threads 821 of 82) are engaged, the substantially outer circumferential surface of the second reinforcing bar 82 may be in a form that inscribes the substantially outer circumferential surface of the second eccentric member 30. Then, the third male thread 32 and the second male thread 821 may be screwed together with the third female thread 421 of the second coupling section 42 of the coupling nut 40. That is, the second male thread 821 of the second reinforcing bar 82 is also screwed with the second female thread 311 provided in the second fastening hole 31 of the second eccentric member 30, and the coupling nut It is also screwed into the third female thread 421 provided in the second coupling section 42 of (40). Accordingly, the second reinforcing bar 82 may be strongly bound to the reinforcing bar coupler 10.

In particular, according to the above structure, since the female thread of the rebar coupler and the female thread of the eccentric member are screwed together with the male thread of the reinforcing bar, it is possible to limit (prevent) the independent rotation of the rebar coupler and the eccentric member with respect to the reinforcing bar. In addition, since the male thread of the eccentric member and the male thread of the rebar are screwed together with the female thread of the rebar coupler, it is possible to limit (prevent) the independent rotation of the eccentric member and the rebar with respect to the rebar coupler. As a result, it is possible to strengthen the binding between the rebar coupler and the reinforcing bar and the eccentric member with only a unique screw connection without strong compression such as a wedge.

As described above with reference to the drawings illustrated for the present invention, the present invention is not limited by the embodiments and drawings disclosed in the present specification, and various by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformations can be made. In addition, even if not explicitly described and described the operating effects according to the configuration of the present invention while describing the embodiments of the present invention, it is natural that the predictable effects by the configuration should also be recognized.

10: rebar coupler
20: first eccentric member
21: 1st fastening hole
211: first female thread
22: wedge outer peripheral surface
23: fourth male thread
30: second eccentric member
31: 2nd fastening hole
311: second female thread
32: third male thread
40: coupling nut
41: first coupling section
411: If inside the wedge
412: fourth female thread
42: second coupling section
421: third female thread
50: first insertion wedge
51: first wedge
52: first head portion
60: second insertion wedge
61: second wedge
62: second head portion
81: first reinforcing bar
811: first male thread
812: first hollow part
82: second reinforcing bar
821: second male thread
822: second hollow section

Claims (8)

As a reinforcing bar coupler 10 connecting the first reinforcing bar 81 disposed on one side in the longitudinal direction and the second reinforcing bar 82 disposed at the other side in the longitudinal direction,
A first fastening hole 21 having a first male thread 211 screwed to the first male thread 811 formed on the outer circumferential surface of the first reinforcing bar 81 is provided, and the first fastening hole 21 A first eccentric member 20 eccentrically arranged by a first distance from the central axis;
A second fastening hole 31 having a second male thread 311 screwed to the second male thread 821 formed on the outer circumferential surface of the second reinforcing bar 82 is provided, and the second fastening hole 31 A second eccentric member 30 disposed eccentrically by a second distance from the central axis;
A first coupling section 41 extending in the longitudinal direction and engaging with the first eccentric member 20 is provided on one side in the longitudinal direction, and a second engaging section 41 engaging with the second eccentric member 30 at the other side in the longitudinal direction. A coupling nut 40 having two coupling sections 42;
A first wedge portion 51 inserted into the first hollow portion 812 of the first reinforcing bar 81 and a first head portion 52 connected to an end of the first wedge portion 51 1 insertion wedge 50; And
A second wedge portion 61 inserted into the second hollow portion 822 of the second reinforcing bar 82 and a second head portion 62 connected to the end of the second wedge portion 61 Including; 2 insertion wedge (60);
The first head portion 52 and the second head portion 62 face each other in the longitudinal direction and contact each other, a reinforced coupler.
The method according to claim 1,
The outer circumferential surface of the first eccentric member 20 includes a wedge outer circumferential surface 22 whose cross section gradually decreases toward one side in the longitudinal direction,
The inner circumferential surface of the first coupling section 41 of the coupling nut 40 includes a wedge inner circumferential surface 411 of a shape complementary to the wedge outer circumferential surface 22 so as to be engaged with the wedge outer circumferential surface 22 Coupler.
The method according to claim 2,
The outer circumferential surface of the second eccentric member 30 has a third male thread 32 formed in the first direction,
The inner circumferential surface of the second coupling section (42) of the coupling nut (40) has a third female thread (421) that is screwed with the third male thread (32), a reinforced coupler.
The method according to claim 1,
The outer circumferential surface of the second eccentric member 30 has a third male thread 32 formed in the first direction,
The inner circumferential surface of the second coupling section 42 of the coupling nut 40 has a third female thread 421 that is screwed with the third male thread 32,
The outer circumferential surface of the first eccentric member 20 is provided with a fourth male thread 23 formed in the second direction,
The inner circumferential surface of the first coupling section 41 of the coupling nut 40 has a fourth female thread 412 that is screwed with the fourth male thread 23,
The first direction and the second direction are opposite directions, a reinforced coupler.
The method of claim 4,
The outer diameters of the first eccentric member 20 and the second eccentric member 30 are different from each other, a reinforced coupler.
As a reinforcing bar coupler 10 connecting the first reinforcing bar 81 disposed on one side in the longitudinal direction and the second reinforcing bar 82 disposed at the other side in the longitudinal direction,
A first fastening hole 21 having a first male thread 211 screwed to the first male thread 811 formed on the outer circumferential surface of the first reinforcing bar 81 is provided, and the first fastening hole 21 A first eccentric member 20 eccentrically arranged by a first distance from the central axis;
A second fastening hole 31 having a second male thread 311 screwed to the second male thread 821 formed on the outer circumferential surface of the second reinforcing bar 82 is provided, and the second fastening hole 31 A second eccentric member 30 disposed eccentrically by a second distance from the central axis; And
A first coupling section 41 extending in the longitudinal direction and engaging with the first eccentric member 20 is provided on one side in the longitudinal direction, and a second engaging section 41 engaging with the second eccentric member 30 at the other side in the longitudinal direction. Including; coupling nut 40 having two coupling sections 42,
The first fastening hole 21 has a shape that is open to the side of the first eccentric member 20, so that the first reinforcing bar 81 can be inserted into the first fastening hole 21 in the opened side,
The second fastening hole 31 has a shape that is open to the side of the second eccentric member 30, so that the second reinforcing bar 82 can be inserted into the second fastening hole 31 toward the opened side. Coupler.
The method of claim 6,
The outer circumferential surface of the second eccentric member 30 has a third male thread 32 formed in the first direction,
The inner circumferential surface of the second coupling section 42 of the coupling nut 40 has a third female thread 421 that is screwed with the third male thread 32,
The outer circumferential surface of the first eccentric member 20 has a fourth male thread 23 formed in a second direction,
The inner circumferential surface of the first coupling section 41 of the coupling nut 40 has a fourth female thread 412 that is screwed with the fourth male thread 23,
The pitch or lead of the fourth male thread 23 and the first male thread 811 correspond to each other,
The pitch or lead of the third male thread (32) and the second male thread (821) correspond to each other.
The method of claim 7,
The first direction and the second direction are the same direction,
The third male thread 32 and the fourth male thread 23 are the same or corresponding standards,
The first eccentric member 20 and the second eccentric member 30 are of the same or corresponding standard, a reinforced coupler.

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