KR20200138962A - Steel wire fastening coupler and concrete fixing construction method of the same - Google Patents

Abstract

The present invention provides a strand fastening coupler, which can fasten a plurality of strands to a coupler body, can increase the tension of the strand by increasing fixing power in concrete, and can be easily constructed in the concrete. The strand fastening coupler according to a preferred embodiment of the present invention comprises: the coupler body having a screw fastening groove formed in the center of an upper surface to have a predetermined depth; a strand fastening wedge unit which is screwed into the screw fastening groove of the coupler body to fasten the plurality of strands; and a fixing means which is fastened to the coupler body and exerts the fixing power in the concrete. The strand fastening wedge unit includes: a wedge housing having conical strand lead-in holes as many as the number corresponding to the plurality of strands; a strand fastening wedge which is divided into a plurality of parts to be inserted into the conical strand lead-in hole of the wedge housing, and taper-coupled at the same inclination to engage the strand in a teeth form; a binding ring which binds the plurality of strand fastening wedges in a circular arrangement; and a wedge spring which pushes the strand fastening wedge to the inner surface of the conical strand lead-in hole of the cylindrical wedge housing.

Description

Steel wire fastening coupler and concrete fixing construction method of the same}

The present invention relates to a steel wire fastening coupler used to fasten a stranded wire and a concrete fixing construction method thereof, and in particular, a plurality of stranded wires can be quickly fastened to one coupler body, and the fixing power in concrete can be increased. It is possible to increase the tension of the stranded wire, and to a coupler for fastening the stranded wire so that it can be easily constructed on concrete, and a concrete fixing construction method thereof.

In general, it is known that factory-made concrete segments are connected to each other in order to construct prefabricated bridges or underground structures (e.g., road connecting passages, etc.). . In this case, since the reinforcing bars, steel bars, or strands maintain straightness, there is a difficulty that cannot be applied when the concrete segment deviates.

Therefore, if a stranded wire (steel wire) is applied, it has the advantage that the construction can be continued due to the bendability of the stranded wire even if it deviates from the tolerance to some extent during the assembly construction of the concrete segment. Therefore, a coupler capable of fixing the stranded wire to the concrete segment is required. In addition, the method of how the coupler is installed on the concrete segment must also be devised.

As a background technology of the present invention, as Korean Utility Model Publication No. 20-2017-0000386, a'high-strength rebar coupler' has been proposed. This includes a body in which at least two receiving grooves having a predetermined diameter are formed, a connector in which each of the receiving grooves is communicated with each other by a through hole perforated in the body, an elastic body provided to be elastically restored in each of the receiving grooves, and the At least two or more screws are detachably screwed to the connector, but the reinforcing bar is inserted into the receiving groove at one side of each, so that a plurality of reinforcing bars can be connected to each other to the connector, and inside each of the outer covers It is provided with a number of radially, but the inner surface includes an inner cover that prevents rotation as well as separation of the inserted reinforcing bar by combining the outer shape and shape of the reinforcing bar drawn into the inside of the outer cover. It was made to lose.

However, the above background technology does not propose a technique for how a high-strength rebar coupler can be constructed in a mold in which concrete is poured, and when tension is applied by connecting one end of a stranded wire There is no technical alternative as to how anchoring can be achieved.

Accordingly, the present applicant proposed Korean Patent Registration No. 10-1902007 to easily fix the steel wire through the steel wire coupler, and proposed a method that allows the steel wire coupler to be firmly fixed to concrete.

In addition, a coupler for fastening strands has been proposed so that a plurality of strands can be fastened to one coupler body, and a tension force can be increased by increasing the fixing power of the coupler in a concrete layer.

Korea Public Utility Model Publication No. 20-2017-0000386 Korean Patent Registration No. 10-1902007

In the present invention, a plurality of strands can be fastened to one coupler body, and the tension of the strands can be increased by configuring to increase the fixing power in concrete, and a coupler for fastening strands that can be easily constructed on concrete. And it has its purpose to provide a concrete fixing construction method thereof.

A coupler for fastening a stranded wire according to a preferred embodiment of the present invention includes a coupler body having a screw fastening groove formed at a predetermined depth in the center of an upper surface; A wedge unit for fastening a stranded wire that is screwed into a screw fastening groove of the coupler body to fasten a plurality of strands; A fixing means fastened to the coupler body and exerting a fixing force in concrete, wherein the wedge unit for fastening the stranded wire includes a wedge housing having a conical wire entry hole as many as a number corresponding to a plurality of strands; A wire fastening wedge that is divided into a plurality of pieces and inserted into the conical wire entry hole of the wedge housing and then taper-coupled at the same inclination to engage the wire into teeth; A binding ring for binding the plurality of stranded wire fastening wedges to be circularly arranged; It characterized in that it comprises a; a wedge spring for pushing the wire fastening wedge to the inner surface of the conical wire entry hole of the cylindrical wedge housing.

In addition, a shear key annular groove is further formed on the outer circumferential surface of the coupler body in order to increase the pull-out resistance of the coupler for fastening the stranded wire in the concrete segment.

In addition, the wedge housing is characterized in that a wedge separation prevention plate is further installed on the bottom surface to prevent the installation and separation of the stranded wire fastening wedge and the wedge spring.

In addition, the conical wire lead-in hole is characterized in that the wedge housing is circularly arranged at a predetermined interval in the circumferential direction.

In addition, the fixing means is characterized by consisting of an anchor bolt screwed to the coupler body.

In addition, the fixing means includes a second strand fastening wedge that is divided and tapered into a plurality of second conical strand lead holes formed through the coupler body in the same axis as the conical strand lead hole; An anchor strand having one end engaged with the second strand fastening wedge; A plate-shaped anchor acupressure plate inserted into the other end of the anchor strand; An anchor housing in close contact with the rear surface of the anchor pressure plate; It characterized in that it consists of a steel strand pressure plate unit including; an anchor wedge that is dividedly assembled and tapered to the anchor housing and is circularly arranged by a binding ring.

A coupler for fastening a stranded wire according to another embodiment of the present invention comprises a screw fastening groove formed at a certain depth in the center of an upper surface, and a plurality of second conical strands formed by communicating with the screw fastening groove by forming the same axis with the conical strand lead-in hole of the wedge housing. A coupler body having an inlet hole; A wedge unit for fastening a stranded wire is screwed into the screw fastening groove of the coupler body to fasten a plurality of strands, wherein the wedge unit for fastening the strands includes a wedge housing having conical strand entry holes as many as the number corresponding to the plurality of strands. ; A wire fastening wedge that is divided into a plurality of pieces and inserted into the conical wire entry hole of the wedge housing and then taper-coupled at the same inclination to engage the wire into teeth; A binding ring for binding the plurality of stranded wire fastening wedges to be circularly arranged; A wedge spring for pressing the stranded wire fastening wedge onto the inner surface of the conical stranded wire entry hole of the cylindrical wedge housing; It is characterized in that it includes a second stranded wire fastening wedge that is divided and assembled into a plurality of pieces of the second conical wire lead-in hole of the coupler body to be tapered, and that the second wire is engaged in teeth.

On the other hand, the concrete fixing construction method of the coupler for fastening the stranded wire according to the present invention comprises the steps of preparing each component of the coupler for fastening the stranded wire; Arranging the coupler body to which the fixing means is coupled into the mold, fastening the recess former to the screw fastening groove of the coupler body, and fixing the recess former to the mold; Pouring concrete into a mold; Disassembling the mold when the curing of the concrete is completed and the concrete segment is produced, and removing the recess former by unscrewing the screw from the coupler body using a dedicated tool; It characterized in that the construction comprises a; step of mounting the wedge unit for fastening the stranded wire by screwing on the coupler body using a dedicated tool.

In addition, the dedicated tool is characterized in that it has a rotary handle at one end and a binding pin inserted into a plurality of conical stranded wire entry holes on the wedge housing side at the other end.

In addition, the fixing means includes a second stranded wire fastening wedge that is divided and tapered into a plurality of second conical wire lead-in holes formed through the coupler body 12 coaxially with the conical wire lead-in hole; An anchor strand having one end engaged with the second strand fastening wedge; A plate-shaped anchor acupressure plate inserted into the other end of the anchor strand; An anchor housing in close contact with the rear surface of the anchor pressure plate; It characterized in that it consists of a steel strand pressure plate unit including; an anchor wedge that is dividedly assembled and tapered to the anchor housing and is circularly arranged by a binding ring.

According to the coupler for fastening strands of the present invention and the concrete fixing construction method thereof, the strand fastening wedges are installed in a plurality of locations on the side of the strand fastening wedge unit, so that a plurality of strands can be fastened to one coupler body. In addition, an anchor acupressure plate is included to increase the anchoring power in concrete, so that the tension of the strands can be increased in a coupler for fastening the strands, thereby increasing the bonding force between the concrete segments.

In addition, the coupler body is fixed in the mold using a recess former, and after concrete is poured, the recess former is removed with a dedicated tool. After that, the wedge unit for fastening the strands is assembled to the coupler body, so that the construction of the coupler for fastening the stranded wire in the concrete. It can be easily implemented. In addition, by using the wedge separation prevention plate, it is possible to easily assemble without separation between the parts constituting the wedge unit for fastening the stranded wire.

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings. It is limited and should not be interpreted.
1A is a block diagram of a coupler for fastening a stranded wire according to an embodiment of the present invention.
FIG. 1B is a diagram illustrating a state in which a strand is fastened to the coupler for fastening the strand shown in FIG. 1A.
Figure 2 is a plan view of the coupler for fastening the stranded wire shown in Figure 1a.
Figure 3 is an exploded perspective view of the coupler for fastening the stranded wire shown in Figure 1a.
Figures 4a to 4d is a construction flow diagram of a coupler for fastening a stranded wire according to an embodiment of the present invention.
Figure 5a is a construction state fixed to the mold in a state in which the steel strand acupressure plate unit according to another embodiment of the present invention is installed on a coupler body.
Figure 5b is a state diagram constructed on a concrete segment in a state provided with a steel strand pressure plate unit according to another embodiment of the present invention.
Figure 6a is a configuration diagram of a coupler for fastening a stranded wire according to another embodiment of the present invention.
Figure 6b is a state diagram in which the stranded wire is fastened to both sides of the coupler for fastening the stranded wire shown in Figure 6a.

In the following, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the disclosed embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The coupler 10 for fastening a stranded wire according to an embodiment of the present invention is provided with a coupler body 12 as shown in FIGS. 1 to 3. The coupler body 12 has a screw fastening groove 121 formed to a predetermined depth in the center of the upper surface. In addition, the coupler body 12 is preferably further formed with a shear key annular groove 123 on its outer circumferential surface in order to increase the pulling resistance of the coupler 10 for fastening the stranded wire in concrete.

A stranded wire fastening wedge unit 14 for fastening the stranded wire 5 to the coupler body 12 is coupled. The wedge unit 14 for fastening the stranded wire is assembled by being screwed into the screw fastening groove 121 of the coupler body 12.

The wedge unit 14 for fastening the strands is a wedge housing 142 having a plurality of conical strands lead-in holes 142a, and is divided into a plurality of pieces and tapered to the wedge housing 142 to engage the strands 5 in teeth. The stranded wire fastening wedge 144 and the plurality of stranded wire fastening wedges 144 are circularly bonded to each other, and the stranded wire fastening wedge 144 is connected to the conical wire inlet hole 142a of the cylindrical wedge housing 142 It includes a wedge spring 148 that pushes the inner surface of the. At this time, it is preferable that the conical wire lead-in holes 142a are circularly arranged in the wedge housing 142 at a predetermined interval in the circumferential direction. In the present embodiment, the number of conical strand lead-in holes 142a is composed of six, but the number is not limited thereto.

At this time, the inlet diameter of the conical wire lead-in hole 142a may be configured to be slightly larger than the outer diameter of the wire 5 so that the wire 5 is freely inserted. The stranded wire fastening wedge 144 has a serrated thread formed on the inner surface for engaging the stranded wire 5. The binding ring 146 has elasticity and may be formed of a ring spring or a silicone ring.

In addition, when the wire fastening wedge 144 is in close contact with the inner surface of the conical wire lead-in hole 142a by the wedge spring 148 force, the inner diameter thereof is configured to be slightly smaller than the outer diameter of the wire 5. The stranded wire fastening wedge 144 may be divided into three or four pieces and assembled.

Therefore, when the stranded wire 5 is inserted into the conical strand entering hole 142a, the fastening wedge 144 enters the inside of the conical strand entering hole 142a and the wedge spring 148 is compressed and at the same time the inner diameter of the strand fastening wedge 144 Is expanded. As a result, the stranded wire 5 is inserted into the inner diameter of the stranded wire fastening wedge 144 to be inserted deeply into the conical strand lead-in hole 142a. Thereafter, with the restoring force of the wedge spring 148, the steel wire fastening wedge 144 again bites the wire 5 and is in close contact with the conical wire lead-in hole 142a as shown in FIG. 1B to prevent separation (fallout) of the wire 5 The conclusion is completed.

Here, it is preferable that the wedge housing 142 is further provided with a wedge separation prevention plate 149 that prevents installation and separation of the stranded wire fastening wedge 144 and the wedge spring 148 on the bottom surface. The wedge separation prevention plate 149 may be attached to the bottom surface of the wedge housing 142 with an adhesive or may be installed by screwing.

As such, the wedge housing 142 of the wedge unit 14 for fastening the stranded wire is screwed through the screw fastening groove 121 formed at a certain depth in the center of the upper surface of the coupler body 12 and is caught around the upper surface of the coupler body 12 Stepped (12a) is located. The locking step 12a acts as a means for the pull-out resistance of the coupler 10 for fastening the stranded wire in the concrete segment 2000 to increase the tensile force of the stranded wire 5.

In addition, the coupler body 12 is provided with a fixing means that exhibits a fixing power in concrete.

An anchor bolt 16 may be screwed as shown in FIG. 1A in the first form of the fixing means. The anchor bolt 16 has a male threaded portion 161 for screwing one end to the coupler body 12 and an anchor bent portion 162 for exerting an anchoring force at the other end.

In the second form of the fixing means, as shown in FIGS. 5A and 5B, it may be composed of a stranded pressure plate unit 300 for further increasing the anchoring force. The stranded acupressure plate unit 300 is a second stranded wire fastening wedge that is divided and tapered into a plurality of second conical stranded strands formed in the coupler body 12 in the same axis as the conical stranded strand entering hole 142a ( 302), the anchor strand 304 having one end engaged with the second strand fastening wedge 144a, the anchor pressure plate 306 inserted into the other end of the anchor strand 304, and the anchor pressure plate 306 ), and an anchor wedge 309 that is separately assembled and tapered to the anchor housing 308. Of course, the second stranded wire fastening wedge 302 and the anchor wedge 309 are bound by the same binding ring.

Here, the second stranded wire fastening wedge 302 and the anchor wedge 309 have identically serrated threads formed on their inner surfaces.

As described above, since the fixing means of the second type is provided with a plurality of anchor acupressure plates 306 forming a plate shape, it can exhibit a larger fixing force than the anchor bolts 16.

A method of fixing and constructing the steel stranded wire fastening coupler 10 configured as described above in concrete will be described.

First, each component of the coupler 10 for fastening the stranded wire is prepared.

Then, as shown in Fig. 4a or 5a, the coupler body 12 to which the fixing means is coupled is placed in the mold 1000, and the recess former 1100 is fastened to the screw fastening groove 121 of the coupler body 12. After that, the recess former 1100 is fixed to the mold 1000. The recess former 1100 may be fixed to the mold 1000 via a recess former fixing cone 1102 screwed to the mold 1000. In addition, the recess former 1100 may be fixedly installed to the mold 1000 by a recess former fixing bolt 1102 that is screwed through the mold 1000. At this time, a locking nut 1103 preventing loosening of the recess former fixing bolt 1102 may be screwed.

The fixing means is an exemplified anchor bolt 16 or a second strand fastening wedge 302, an anchor strand 304, an anchor pressure plate 306, an anchor housing 308, an anchor wedge 309. 300).

Then, as shown in FIG. 4B, concrete is poured into the mold 1000 to produce a concrete segment 2000.

Then, when curing of the concrete is completed as shown in FIG. 4C, the mold 100 is disassembled, and the recess former 1100 is removed by unscrewing the screw from the coupler body 12 using a dedicated tool 50.

At this time, the dedicated tool 50 has a rotary handle 51 at one end and a binding pin 52 inserted into a plurality of conical stranded wire entry holes 142a on the wedge housing 142 side at the other end.

Therefore, the recess former 1100 can be easily loosened and removed from the coupler body 12 by rotating the dedicated tool 50 in the state where the binding pin 52 is inserted into the conical strand lead-in hole 142a.

Then, as shown in FIG. 4D, the wedge unit 14 for fastening the stranded wire is screwed onto the coupler body 12 using a dedicated tool 50. At this time, a wedge separation prevention plate 149 is installed on the bottom of the wedge housing 142 to prevent separation of the stranded wire fastening wedge 144 and the wedge spring 148, making it easy to install the wedge unit 14 for fastening the stranded wire. Done.

When the stranded wire fastening coupler 10 constructed and constructed as described above is inserted deeply through the conical wire lead-in hole 142a of the wedge housing 142, as shown in FIG. 1B, the wire fastening wedge 144 is rearward. As it moves to, the inner diameter is expanded, and thus the strand 5 enters the inner diameter of the strand fastening wedge 144. At this time, the wedge spring 148 is compressed.

Thereafter, as the strand fastening wedge 144 moves to its original position by the compression repulsive force of the wedge spring 148, the inner diameter of the strand fastening wedge 144 is contracted again by the conical strand lead-in hole 142a, and the strand 5 Will bite strongly.

At this time, since the coupler 10 for fastening the stranded wire is anchored to the concrete segment 2000 through the anchor bolt 16, the anchoring power of the stranded wire 5 is increased. Of course, when using the stranded acupressure plate unit 300, the fixing power of the stranded wire 5 is further increased. Accordingly, it is possible to increase the bonding force of the concrete segment 2000 in which the coupler 10 for fastening the stranded wire is installed.

Meanwhile, the coupler 10 for fastening a stranded wire according to the present invention may be used for the purpose of connecting the stranded wire 5 and the stranded wire 5a as shown in FIGS. 6A and 6B.

That is, the coupler 10 for fastening the stranded wire has a screw fastening groove 121 formed at a certain depth in the center of the upper surface as shown in FIGS. 6A and 6B, and a plurality of second conical wire lead-in holes formed in communication with the screw fastening groove 121 It includes a coupler body 12 provided with 125 and a wedge unit 14 for fastening a stranded wire which is screwed into the screw fastening groove 121 of the coupler body 12 to fasten the stranded wire 5. , A second stranded wire fastening wedge (144a) that is divided and assembled into a plurality of conical stranded wire lead-in holes (142a) and a second conical stranded wire lead-in hole (125) formed on the same axis and is tapered to engage the second strand (5a) into teeth. ) Can be included. At this time, the wedge spring 148 is disposed between the strand fastening wedge 144 and the second strand fastening wedge 144a on the side of the wedge unit 14 for fastening the strand.

When the coupler 10 for fastening the stranded wire is configured as described above, the strand 5 on one side is engaged with the strand fastening wedge 144 on the side of the strand fastening wedge unit 14, and the strand 5a on the other side is a second strand It is engaged with the fastening wedge (144a). Therefore, the stranded wire 5 on one side and the stranded wire 5a on the other side may be long connected in a uniaxial form through a coupler 10 for fastening a stranded wire. Therefore, it can be easily applied to join the concrete segment 2000 by connecting it to a desired length with a short stranded wire 5 or 5a.

Until now, the present invention has been described in detail with reference to the presented embodiments, but those of ordinary skill in the art can make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such modifications and modifications, but is limited by the claims appended below.

12: coupler body
121: screw fastening groove
123: shear key annular groove
14: wedge unit for fastening stranded wire
142: wedge housing
142a: Conical strand entry hole
144: strand fastening wedge
146: binding ring
148: wedge spring
149: wedge departure prevention plate
16: anchor bolt
300: stranded wire acupressure plate unit
302: second strand fastening wedge
304: anchor strand
306: anchor acupressure plate
308: anchor housing
309: anchor wedge

Claims (10)

In the stranded wire fastening coupler 10 used to fasten the stranded wire 5,
A coupler body 12 having a screw fastening groove 121 formed at a predetermined depth in the center of the upper surface;
A wedge unit for fastening a stranded wire (14) which is screwed into the screw fastening groove (121) of the coupler body (12) to fasten a plurality of strands (5);
Including; a fixing means that is fastened to the coupler body 12 to exhibit a fixing power in concrete,
The wedge unit 14 for fastening the strands includes a wedge housing 142 having a conical strand lead-in hole 142a as many as a number corresponding to the plurality of strands 5;
A wire fastening wedge 144 that is divided into a plurality of pieces and inserted into the conical wire lead-in hole 142a of the wedge housing 142 and then taper-coupled at the same inclination to engage the wire 5 in a tooth shape;
A binding ring 146 for binding the plurality of stranded wire fastening wedges 144 to be circularly arranged;
A wedge spring 148 for pushing the stranded wire fastening wedge 144 to the inner surface of the conical wire lead-in hole 142a of the cylindrical wedge housing 142; A coupler for fastening a stranded wire, comprising: a. The method of claim 1,
A coupler for fastening a stranded wire, characterized in that a shear key annular groove (123) is further formed on the outer circumferential surface of the coupler body (12) to increase the pulling resistance of the coupler (10) for fastening the stranded wire in the concrete segment (2000). The method of claim 1,
The wedge housing (142) is a wire fastening coupler, characterized in that further provided with a wedge separation prevention plate (149) that prevents the installation and separation of the stranded wire fastening wedge (144) and the wedge spring (148) on the bottom surface. The method of claim 1,
The conical wire lead-in hole (142a) is a coupler for fastening a stranded wire, characterized in that the wedge housing (142) is circularly arranged at a predetermined interval in the circumferential direction. The method of claim 1,
The fixing means is a coupler for fastening a stranded wire, characterized in that consisting of an anchor bolt (16) screwed to the coupler body (12). The method of claim 1,
The fixing means is a second stranded wire fastening wedge 302 that is divided and tapered into a plurality of second conical wire lead-in holes 125 formed through the coupler body 12 in the same axis as the conical wire lead-in hole 142a. Wow;
An anchor strand 304 having one end engaged with the second strand fastening wedge 144a;
A plate-shaped anchor pressure plate (306) inserted into the other end of the anchor strand (304);
An anchor housing 308 in close contact with the rear surface of the anchor acupressure plate 306;
A coupler for fastening a stranded wire, comprising: an anchor wedge 309 that is dividedly assembled and tapered to the anchor housing 308 and is circularly arranged with a binding ring 307. A plurality of second conical steel wire lead-in holes formed by communicating with the screw-fastening groove 121 by forming the same axis as the screw fastening groove 121 formed in the center of the upper surface and the conical wire lead-in hole 142a of the wedge housing 142 A coupler body 12 provided with 125;
Including a wedge unit 14 for fastening a stranded wire that is screwed into the screw fastening groove 121 of the coupler body 12 to fasten a plurality of strands 5,
The wedge unit 14 for fastening the strands includes a wedge housing 142 having a conical strand lead-in hole 142a as many as a number corresponding to the plurality of strands 5;
A wire fastening wedge 144 that is divided into a plurality of pieces and inserted into the conical wire lead-in hole 142a of the wedge housing 142 and then taper-coupled at the same inclination to engage the wire 5 in a tooth shape;
A binding ring 146 for binding the plurality of stranded wire fastening wedges 144 to be circularly arranged;
A wedge spring 148 for pressing the stranded wire fastening wedge 144 to the inner surface of the conical stranded wire entry hole 142a of the cylindrical wedge housing 142;
It is characterized in that it includes a second strand fastening wedge (144a) that is divided and assembled into a plurality of pieces of the second conical strand lead-in hole (125) of the coupler body (12) to be tapered and fastened to the second strand (5a) in teeth. Coupler for fastening stranded strands. Preparing each component of the coupler (10) for fastening the stranded wire, characterized in that any one of claims 1 to 6;
The coupler body 12 to which the fixing means is coupled is placed in the mold 1000, and the recess former 1100 is fastened to the screw fastening groove 121 of the coupler body 12, and the recess former 1100 Fixing the mold to the mold 1000;
Pouring concrete into the mold 1000;
When the curing of the concrete is completed and the concrete segment is produced, dismantling the mold 100 and removing the recess former 1100 by unscrewing the screw from the coupler body 12 using a dedicated tool 50;
A method of fixing concrete for a coupler for fastening a stranded wire, characterized in that it is constructed, including; mounting the wedge unit 14 for fastening the stranded wire to the coupler body 12 by screwing it using a dedicated tool 50. The method of claim 8,
The dedicated tool 50 has a rotating handle 51 at one end and a binding pin 52 inserted into a plurality of conical wire entry holes 142a on the wedge housing 142 at the other end. Concrete fixing construction method of coupler. The method of claim 8,
The fixing means is a second stranded wire fastening wedge 302 that is divided and tapered into a plurality of second conical wire lead-in holes 125 formed through the coupler body 12 coaxially with the conical wire lead-in hole 142a. )Wow;
An anchor strand 304 having one end engaged with the second strand fastening wedge 144a;
A plate-shaped anchor pressure plate (306) inserted into the other end of the anchor strand (304);
An anchor housing 308 in close contact with the rear surface of the anchor acupressure plate 306;
Concrete fixing of a coupler for fastening a stranded wire, characterized in that consisting of an anchor wedge 309 which is dividedly assembled and tapered to the anchor housing 308 and is circularly arranged with a binding ring 307; Construction method.

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