KR20200092699A - Rebar coupler - Google Patents

Abstract

Disclosed in the present invention is a reinforcing bar coupler. The reinforcing bar coupler of the present invention applies a ring structure having at least one pressuring part into the coupler in a multiple stage, thereby effectively suppressing a flow of reinforcing bars in the coupler and increasing joint performance of a plurality of reinforcing bars.

Description

Rebar coupler {REBAR COUPLER}

The present invention relates to a reinforcing bar coupler connecting a plurality of reinforcing bars.

In general, reinforcing bars are commonly used to reinforce the strength of concrete structures because they are buried inside concrete when constructing reinforced concrete structures in the construction or civil engineering fields. In particular, civil structures such as large structures, special structures, and bridges A large amount of reinforcing bar is used.

However, rebars are standardized to a certain length and are produced, so in the case of large structures, special structures, and civil structures such as bridges, rebars produced in a limited length must be used by connecting joints.

In general, a method of connecting reinforcing bars used up to now, such as layering, welding, threading, and mechanical jointing, is used.

The layering is a method of overlapping the reinforcing bars with a predetermined length by binding each other with wires or wires, so the reinforcing bars must be overlapped each time, so the loss of reinforcing bars is large and the strength of the overlapping part is easily separated. .

Since the welding joint is cumbersome and heats the weld, the reinforcing bar strength around the weld is significantly weakened due to heat.

Accordingly, a rebar coupler capable of easily connecting and connecting a plurality of rebars has been conventionally disclosed.

However, the reinforcing bar couplers disclosed in the related art use a screw fastening method as in Patent Publication No. 10-2013-01033981, or a projection of a knitting piece is engaged with a reinforcing bar node as in Patent Publication No. 10-1643846. It is configured to push the knitted body with the elastic force of the spring, or to press the outer circumferential surface of the reinforcing bar using a spring and a key (KEY) as in Patent No. 10-1791468 and Patent No. 10-1866816.

However, the screw fastening method as described above has a fatal disadvantage in that the end of the reinforcing bar must be processed, and the method using the knitted body and the spring and/or the key has a structural disadvantage in that the reinforcing bar is easily detached due to weak contact force between the outer circumferential surface of the reinforcing bar. In the case of a coupler using a key, since the structure is complicated, a lot of manual work is required, and thus construction time and cost are inevitable.

Registered Patent Publication No. 10-1319398 (Announcement date 2013.10.17.) Registered Patent Publication No. 10-1643846 (Announcement date 2016.08.10.) Registered Patent Publication No. 10-1791468 (Notice 2017.10.30.) Registered Patent Publication No. 10-1866816 (announcement date 2018.06.12.)

The problem to be solved by the present invention, by applying a multi-stage ring structure having at least one pressing portion inside the coupler, while effectively suppressing the flow of the reinforcing bar inside the coupler, reinforced coupler to increase the connection joint performance of multiple rebars Is to provide.

Reinforcing bar coupler as a means for solving the problems of the present invention includes: a first body into which one end of a reinforcing bar is introduced; A second body into which the other end of the reinforcing bar is drawn; And, a connecting body coupling the first and second bodies; Including, the first body and the inner circumferential surfaces of the second body to form a ring seating groove forming a multi-stage, respectively, the ring seating groove is a reinforcing bar fixing portion forming a pressing line to press and fix the outer circumferential surface of the reinforcing bar Is to settle.

In addition, in the ring seating groove, when the rebar is pulled, the rebar fixing portion is engaged to form an inclined surface tapered in the outer direction so as to prevent departure from the outside.

In addition, the reinforcing bar fixing portion is a C-shaped ring structure formed by bending any one of a triangular rod, a square rod, a pentagonal rod, and a hexagonal rod, and the pressing line bends any one of a triangular rod, a square rod, a pentagonal rod, and a hexagonal rod. The formed C-shaped ring structure is an edge line that is in point contact with the outer circumferential surface of the reinforcing bar.

In addition, the pressurizing line is at least one triangular protrusion that points to the outer circumferential surface of the reinforcing bar, when bending one of the triangular rod, square rod, pentagonal rod, and hexagonal rod into the C-shaped ring structure through torsion processing. It has a form.

In addition, a first spiral portion and a second spiral portion are respectively formed at one end of the inner circumferential surface of the first body and the second body, and a third for fastening the spiral with the first and second spiral portions on the outer circumferential surface of the connecting body. It is to form a spiral.

In addition, a plate is formed in the inner center of the connecting body, and the plate is connected to the first body or the second body in connection with rotation of the first body and the second body when the first and second helix portions and the third helix portion are screwed. It is to form a hexagonal fastener to which the hexagonal tool is fastened to prevent the rotation at the same time.

In addition, the width of the ring seating groove is formed to be wider than the width of the rebar fixing portion so that the rebar fixing portion can flow when the rebar enters or pulls.

As described above, the present invention is a multistage application of a ring structure having at least one pressing portion inside a coupler, and through this, it is possible to expect an effect of effectively increasing the connection joint performance of multiple reinforcing bars while effectively suppressing the flow of reinforcing bars in the coupler.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a structure of a rebar coupler as an embodiment of the present invention.
Figure 2 is an exploded perspective view showing the structure of a rebar coupler as an embodiment of the present invention.
Figure 3 is a front schematic view showing the structure of a rebar coupler as an embodiment of the present invention.
4 is an internal projection view showing the structure of a reinforcing bar coupler as an embodiment of the present invention.
5 is a cross-sectional view taken along line AA of FIG. 4 as an embodiment of the present invention.
6 is a schematic cross-sectional view showing a state in which reinforcing bars enter a reinforcing bar coupler as an embodiment of the present invention.
Figure 7 is a schematic cross-sectional view showing a state of pulling the rebar entering the rebar coupler as an embodiment of the present invention.
8 is a perspective view showing a structure of a rebar fixing part of a triangular rod as an embodiment of the present invention.
Figure 9 is a perspective view showing the structure of the reinforcing bars of a square rod as an embodiment of the present invention.
Figure 10 is a perspective view showing the structure of the fixing portion of the pentagonal rod as an embodiment of the present invention.
11 is a perspective view showing the structure of a rebar fixing part of a hexagonal rod as an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, in the embodiments of the technical idea of the present invention, the present invention is not limited to the embodiments disclosed below, and may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and the technology to which the present invention pertains It is provided to fully inform the person of ordinary skill in the field of the scope of the invention, and is only defined by the scope of the claims in the embodiments of the technical idea of the present invention.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase.

In this specification, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

In addition, the embodiments described herein will be described with reference to cross-sectional views and/or plan views, which are ideal exemplary views of the present invention. Accordingly, the embodiments of the present invention are not limited to the specific shapes shown, but also include changes in the required shapes. For example, the area illustrated at a right angle may be rounded or may have a shape having a predetermined curvature. Accordingly, the regions illustrated in the figures have schematic properties, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device and is not intended to limit the scope of the invention.

The same reference numerals throughout the specification refer to the same components. Accordingly, the same reference numerals or similar reference numerals may be described with reference to other drawings even though they are not mentioned or described in the corresponding drawings. Further, even if reference numerals are not indicated, they may be described with reference to other drawings.

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

1 is an exploded perspective view showing the structure of a rebar coupler as an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a structure of a rebar coupler as an embodiment of the present invention, and FIG. 3 is a reinforcing bar coupler as an embodiment of the present invention It is a front schematic view showing the structure, Figure 4 is an internal projection view showing the structure of a rebar coupler as an embodiment of the present invention, Figure 5 is a cross-sectional view taken along line AA for Figure 4 as an embodiment of the present invention.

1 to 5, the rebar coupler according to an embodiment of the present invention, the first and second bodies (10, 20) and the connecting body 30, and the ring seating groove 40 and the reinforcing bar It can include the government (50).

The first body 10 is a cylindrical structure into which one end of one reinforcing bar 100 is drawn, and the first spiral 11 is formed on one end of the inner circumferential surface.

The second body 20 is a cylindrical structure having the same shape as the first body 10, which is one end of another reinforcing bar 100' can be drawn in, and a second spiral portion 21 at one end of the inner circumferential surface. Is formed.

The connecting body 30 is a combination of the first and second bodies 10 and 20, and on the outer circumferential surface, a third spiral portion 31 for fastening the spiral with the first and second spiral portions 11 and 21 ).

At this time, a plate 32 may be formed in the inner center of the connecting body 30, and the first and second spiral portions 11 and 21 and the third spiral portion 31 may be formed in the plate 32. Hexagonal fastening with a hexagonal tool (e.g. hexagonal bolt) to prevent the connection body 30 from rotating at the same time in connection with the rotation of the first body 10 or the second body 20 when fastening the spiral of the The sphere 33 can be formed.

The ring seating grooves 40 are formed in multiple stages on the inner circumferential surfaces of the first body 10 and the second body 20, respectively, so that the reinforcing bar fixing portion 50 is seated to allow a flowable width W1. To have.

That is, the width W1 of the ring seating groove 40 is the second direction P2 in which the reinforcing bars 100 and 100' enter the first direction P1 or are opposite to the first direction P1. In this case, when the reinforcing bars 100 and 100' are pulled, they are formed to be wider than the width W2 of the reinforcing bar fixing parts 50 so that the reinforcing bar fixing parts 50 can flow.

Accordingly, when the reinforcing bar (100, 100') is pulled in the second direction (P2) in the ring seating groove (40), the reinforcing bar fixing part (50) is caught and tapered in the outer direction to prevent departure from the outside. The true inclined surface 41 can be formed.

The reinforcing bar fixing part 50 is formed by protruding at least one or more pressing lines 51 by twisting, which is seated in the ring seating groove 40 and configured to press the outer circumferential surfaces of the reinforcing bars 100 and 100'. It is done.

That is, the reinforcing bar fixing portion 50 is the pressing line 51 forming the shape of at least one triangular protrusion in point contact with the outer circumferential surface of the reinforcing bars 100 and 100' through torsion processing of the square bar 512. Protrudingly formed, this is a C-shaped ring structure.

On the other hand, the reinforcing bar fixing portion 50, as shown in the attached Figures 8 to 11, triangular rods 511, square rods 512, pentagonal rods 513, hexagonal rods 514 any one of the bending molding It can be configured as a C-shaped ring structure, the pressing line 51 is twisted to any one of the triangular rod 511, square rod 512, pentagonal rod 513, hexagonal rod 514 The post-bending C-shaped ring structure is an edge line that is in point contact with the outer circumferential surfaces of the reinforcing bars 100 and 100', and hereinafter, a description is made of a C-shaped ring structure in which a square rod 512 is twisted. Did.

As described above, the reinforcing bar coupler according to the embodiment of the present invention, as shown in FIGS. 1 to 11, first, the ring seating grooves are formed in multiple stages on the inner circumferential surfaces of the first and second bodies 10 and 20 constituting a symmetrical structure ( 40) while twisting the square rod, the C-shaped ring structure, which is at least one pressing line 51 in the form of a triangular protrusion, is securely seated on the reinforcing bar fixing portion 50 so as to be flowable.

Thereafter, the first and second bodies 10 and 20 constituting a symmetrical structure are connected to the connecting body 30 using first to third spiral parts 11, 21 and 31.

At this time, the first body 10 is coupled to one end of the connecting body 30 through the spiral fastening of the first and third spiral portions 11 and 31, and the second and third spiral portions 21 , When coupling the second body 20 to the other end of the connecting body 30 through the spiral fastening of 31, the hexagonal fastener of the plate 32 formed in the inner center of the connecting body 30 ( If a hexagonal tool (e.g., a hexagonal bolt) is fastened to 33), the connection body 30 can be prevented from rotating simultaneously by interlocking with the rotation of the first body 10 or the second body 20. In the meantime, the first and second bodies 10 and 20 to the connecting body 30 can be fastened and fixed.

Next, one end of one reinforcing bar 100 for joint connection to the first body 10 is entered in the first direction P1.

Then, as one end of the reinforcing bar 100 passes through the reinforcing bar fixing portions 50, which are C-shaped ring structures respectively seated in the multi-stage ring seating grooves 40, the inner plate 32 of the connecting body 30 ).

Thereafter, when the reinforcing bar 100 is pulled in the second direction P2 opposite to the first direction P1, the reinforcing bar fixing part 50, which is a C-shaped ring structure, flows, but the flow is settled in the ring. It stops while being caught by the tapered inclined surface 41 formed in the groove 40.

Then, the pressing line 51 formed on the reinforcing bar fixing portion 50, which is a C-shaped ring structure, makes point contact with the outer circumferential surface of the reinforcing bar 100, thereby pressing the outer circumferential surface of the reinforcing bar 100, 100 is not to be separated from the first body (10).

Meanwhile, one end of the other reinforcing bar 100' for connecting the joint to the second body 20 is entered in the first direction P1.

Then, as the one end of the reinforcing bar 100' passes through the reinforcing bar fixing portions 50, which are C-shaped ring structures respectively seated in the multi-stage ring seating grooves 40, the plates inside the connecting body 30 32).

Thereafter, when the reinforcing bar 100' is pulled in the second direction P2 opposite to the first direction P1, the reinforcing bar fixing part 50 flows, but the flow thereof flows through the ring seating groove 40. It stops while being caught by the tapered inclined surface 41 formed in the.

Then, the pressing line 51 formed on the reinforcing bar fixing portion 50, which is a C-shaped ring structure, makes point contact with the outer circumferential surface of the reinforcing bar 100', thereby pressing the outer circumferential surface of the reinforcing bar 100', While the reinforcing bars 100' are not separated from the second body 20, a plurality of the reinforcing bars 100 and 100' respectively entering the first and second bodies 10 and 20 have a joint connection. It can be completed, the joint connection state is that it can be maintained firmly by the pressing line 51 for pressing the outer circumferential surface of the reinforcing bar (100, 100').

That is, the reinforcing bar (100, 100') is to be kept from being separated from the first and second body (10, 20) from the pressing force of the pressing line 51, it is possible to maintain a solid joint connection.

Here, the C-shaped ring structure, the reinforcing bar fixing part 50 is formed into a C-shaped ring structure while twisting the square rod 512, or a triangular rod 511, a square rod as shown in FIGS. (512), since one of the pentagonal rod 513 and the hexagonal rod 514 is bent, the first reinforcing bars 100 and 100' are inside the first and second bodies 10 and 20. When entering each direction P1 or pulling in the second direction P2, the reinforcing bar fixing part 50 is opened, but when there is no entry or pulling, it is narrowed to the outer circumferential surface of the reinforcing bar 100, 100'. While exerting the restoring force, the pressing force of the pressurizing line 51 formed on the reinforcing bar fixing part 50, which is a C-shaped ring structure, increases, and accordingly, the reinforcing bars 100 and 100' of the pressurizing line 51. The fixed state can be solidified.

In the above, the technical idea of the reinforcing bar coupler of the present invention has been described together with the accompanying drawings, but this is an exemplary description of the best embodiment of the present invention and does not limit the present invention.

Therefore, the present invention is not limited to the specific preferred embodiments described above, and various modifications can be practiced by any person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Needless to say, such changes are within the scope of the claims.

10; First body 11; 1st spiral section
20; Second body 21; Second spiral
30; Connecting body 31; The third spiral
32; Plate 33; Hexagon fastener
40; Ring seating groove 41; incline
50; Reinforcing bar fixing portion 51; Pressurized line
100, 100'; rebar

Claims (7)

A first body into which one end of the reinforcing bar is drawn; A second body into which the other end of the reinforcing bar is drawn; And, a connecting body coupling the first and second bodies; It includes,
On the inner circumferential surfaces of the first body and the second body, a ring seating groove forming a multi-stage is formed,
Reinforcing bar coupler, characterized in that seating the reinforcing bar fixing portion formed with a pressing line to press and fix the outer circumferential surface of the reinforcing bar in the ring seating groove. According to claim 1,
When the rebar is pulled in the ring seating groove, the rebar coupler is characterized by forming a tapered inclined surface in an outer direction so that the reinforcing bar fixing part is locked to prevent escape to the outside. According to claim 2,
The reinforcing bar fixing portion is a C-shaped ring structure formed by bending any one of a triangular rod, a square rod, a pentagonal rod, and a hexagonal rod,
The pressing line is a C-shaped ring structure formed by bending any one of a triangular rod, a square rod, a pentagonal rod, and a hexagonal rod. The reinforcing bar coupler is characterized in that it is an edge line in point contact with the outer circumferential surface of the reinforcing bar. The method of claim 3,
The pressurizing line forms at least one triangular protrusion shape that is in point contact with the outer circumferential surface of the reinforcing bar when bending one of the triangular rod, square rod, pentagonal rod and hexagonal rod into the C-shaped ring structure through torsion processing. Rebar coupler characterized by having. The method of claim 4,
A first spiral portion and a second spiral portion are formed at one end of the inner circumferential surfaces of the first body and the second body, and a third spiral portion for fastening the spiral with the first and second spiral portions is formed on the outer circumferential surface of the connecting body. Reinforcing bar coupler, characterized in that to form. The method of claim 5,
A plate is formed in the inner center of the connecting body, and the plate is connected to the first body or the second body in connection with the rotation of the first body or the second body when the first and second helix portions and the third helix are engaged. Reinforcing bar coupler, characterized in that to form a hexagonal fastener to which the hexagonal tool is fastened to prevent rotation. The method of claim 6,
Reinforcing bar coupler characterized in that the width of the ring seating groove is formed wider than the width of the reinforcing bar fixing portion so that the reinforcing bar fixing portion can flow when the reinforcing bar enters or pulls.

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