KR100984243B1 - Reinforcing bar coupler using an oval shaped rotational wedge - Google Patents

Reinforcing bar coupler using an oval shaped rotational wedge Download PDF

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Publication number
KR100984243B1
KR100984243B1 KR1020100056328A KR20100056328A KR100984243B1 KR 100984243 B1 KR100984243 B1 KR 100984243B1 KR 1020100056328 A KR1020100056328 A KR 1020100056328A KR 20100056328 A KR20100056328 A KR 20100056328A KR 100984243 B1 KR100984243 B1 KR 100984243B1
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KR
South Korea
Prior art keywords
wedge
sleeve
reinforcing bar
reinforcing
elliptical
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KR1020100056328A
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Korean (ko)
Inventor
김용근
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김용근
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Priority to KR1020100056328A priority Critical patent/KR100984243B1/en
Application granted granted Critical
Publication of KR100984243B1 publication Critical patent/KR100984243B1/en
Priority to PCT/KR2011/004112 priority patent/WO2011159049A2/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

The present invention relates to a reinforcing bar connector for connecting the reinforcing bars in a mechanical manner, in particular, the outer surface of the cross section is made of an ellipsoidal tube is inserted into the reinforcing bar is inserted into the inside and the bent receiving portion and the wedge pressure inlet is formed in the transverse direction The present invention relates to a reinforcing bar connector to which an elliptical rotating wedge is applied, characterized in that the sleeve and the cross section are elliptical, and a spline is formed in the longitudinal direction and is pressed into the wedge inlet of the sleeve to fix the rebar to the sleeve. Flexure receiving parts are formed on both sides of the large diameter of the sleeve having an elliptical cross section, and the wedge is elliptical in cross section, and the outer surface forms a spline with a sharp peak in the longitudinal direction. As the tensile load is applied without deviating from the wedge It provides a reinforcing bar connector that binds the reinforcement to the sleeve more firmly as it rotates.

Description

Reinforcing bar coupler using an oval shaped rotational wedge}

The present invention relates to a reinforcing bar connector for connecting the reinforcing bars in a mechanical manner, in particular, the cross section is made of an elliptical cross-section and the longitudinally penetrated reinforcing bar insertion portion and the transversely bent receiving portion is formed in the center of the large diameter and small diameter It consists of a sleeve formed with a wedge pressure inlet of a circular through hole penetrated in the transverse direction and a bar having a cross section of an elliptical cross section, the entire diameter being the same, and a sharp spline formed in the longitudinal direction on the outer surface, and the tip end portion As the thickness becomes thinner and the width becomes narrower, the sleeve and the reinforcing bar are bent through the wedge inlet of the sleeve and penetrated between the ends of the two reinforcing bars inserted into the reinforcing bar by bending the ends of the two reinforcing bars into the bending receiving part. Iron with elliptical rotary wedge consisting of wedges to fix the body integrally It relates to a connector.

Reinforcing bars are produced in a factory to facilitate transport and reinforcement work. Therefore, when reinforcing work in reinforcement concrete structures, reinforcing bars are connected. Conventionally, the ends of reinforcing bars are overlapped by a certain length and tied with a binding line. It is mainly used and it is regulated to connect mechanically only to coarse steel bars with the name of D29 or more. However, in recent years, even when connecting reinforcing bars with the nominal name D22 or less, the overlap length of the reinforcing bars is shorter than specified, or when repairing existing reinforcement concrete structures, the allowable strength for the joints of the reinforcing bars is required. In addition, regulations are being tightened to connect in various mechanical ways.

In the construction of bridges or roads and bridges by the precast method, the already reinforced bars cannot be machined or adjusted in length, so they cannot be connected with screw couplers or connected in a conventional mechanical way. While overlapping and tying them with a binding line, there was a problem in that the rebars were poorly connected because most of the overlapping lengths of the reinforcing bars suitable for construction regulations were not secured.

According to Utility Model Registration No. 0189525 (designated name: reinforcing bar connector) proposed as a reinforcing bar connection method for connecting a reinforcing bar with a diameter, a rectangular insertion hole is formed on the inner circumferential surface to form a protruding jaw like a helix. It characterized in that it is provided with a fixing member of the corresponding size to be inserted into the body member and the fixing hole is formed through the same hole on the same axis. However, as described above, the inner side of the body member is formed in a horizontal plane in the longitudinal direction, and both sides of the fixing pin are composed of an inclined surface having a thick width gradually from the bottom to the top, and the ends of the two reinforcing bars are inserted into the insertion holes of the body member. When the fixing pin is pushed into the fixing hole, two reinforcing bars are opened to be in close contact with the inner surface of the body member and the two reinforcing bars are integrally fixed with the body member. However, when the fixed pins inclined at both sides are pressed into the fixing holes of the body member, the fixing pins may fall out in the reverse direction. The deeper the pressing pins between the two reinforcing bars inserted into the insertion holes of the body member, the thicker the pin becomes, the thicker it becomes. The ends of the two reinforcing bars are fixed to the inner surface of the insertion hole of the body member by the fixing pins. Since the inner surface of the insertion hole of the body member is formed in the horizontal plane, the body member may If the tensile load is applied to two reinforcing bars that cannot be fixed beyond the tensile strength of the reinforcing bars, the two rebars have a problem of falling out of the body member.

In addition, Utility Model Registration No.0207334 (designation name: reinforcing bar joint member) proposes a jointing method for reinforcing steel bars, which has a long circular cross section and a central portion of the short diameter portion of the sleeve. It is characterized by a reinforcing joint member made of a wedge piece inserted into a circular hole, but the sleeve and wedge piece also have the same structure as the body member and the fixing pin provided in the above-mentioned conventional designs. Is there.

The present invention has been made in order to solve the above problems of the conventional reinforcing bar connection, when connecting the reinforcing bar of narrow diameter overlap length is shorter than the specified or repair the existing reinforced concrete structure or constructed by precast method In this case, when reinforcing bars are connected to each other, it is possible to connect the reinforcing bars beyond the allowable strength for the joints of the bars by replacing the method of overlapping the ends of the bars with the binding lines. The purpose of the present invention is to provide a rebar connector that is fast and can be economically secured to the joints compared to the rebar cost according to the overlap length of the rebar.

In order to achieve the above object, the present invention, the outer surface of the cross section is made of an ellipsoidal tubular for the bent water transversely penetrated in the transverse direction in the center of the large diameter and the reinforcing insert portion is provided with two circular through holes in parallel in the longitudinal direction therein A sleeve having a wedge pressure inlet formed of a circular through hole penetrating in the transverse direction at the center of the portion and the small diameter; A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve; It provides a reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of.

According to the present invention, even if a tensile load is applied to the reinforcing bar connected with the sleeve and the wedge by forming a curved receiving portion on both sides of the large diameter of the sleeve having an elliptical cross section, and forming a spline with a vertical cross-section of the wedge and a vertical vertex on the outer surface thereof. As the reinforcing bars do not deviate from the sleeve and the tensile load is applied, the wedge rotates to provide a reinforcing bar connector that more firmly couples the rebar to the sleeve.

In addition, the reinforcing bar connector of the present invention by pressing the wedge into the sleeve to connect the reinforcement to reduce the construction cost by reducing the air according to the quick work, it is possible to work for one person using a hydraulic wedge indenter, the connection after construction It can be inspected quickly with the naked eye, and the manufacturing cost is smaller than the overlap length of the reinforcing bar, and the cost can be reduced.

1 is a perspective view of a reinforcing bar connector applying an elliptical rotating wedge according to a first embodiment of the present invention.
Figure 2 is a cutaway view of the sleeve of the rebar connector to which the elliptical rotating wedge according to the first embodiment of the present invention.
3 is a perspective view and a side view of the wedge of the reinforcing bar connector applying the elliptical rotating wedge according to the first embodiment of the present invention.
4 is a perspective view and a side view of another wedge of the reinforcing bar connector to which the elliptical rotating wedge according to the first embodiment of the present invention is applied.
Figure 5 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the first embodiment of the present invention.
Figure 6 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector applying the elliptical rotating wedge according to the first embodiment of the present invention.
7 is a perspective view of the reinforcing bar connector to which the elliptical rotating wedge according to the second embodiment of the present invention.
8 is a cutaway view of a sleeve of a reinforcing bar connector applying an elliptical rotating wedge according to a second embodiment of the present invention.
Figure 9 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the second embodiment of the present invention.
Figure 10 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the second embodiment of the present invention.
11 is a perspective view of a reinforcing bar connector applying an elliptical rotating wedge according to a third embodiment of the present invention.
12 is a cutaway view of a sleeve of a reinforcing bar connector applying an elliptical rotating wedge according to a third embodiment of the present invention.
Figure 13 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the third embodiment of the present invention.
Figure 14 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the third embodiment of the present invention.
Figure 15 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector is applied to the elliptical rotary wedge consisting of a sleeve of another structure according to the third embodiment of the present invention.
16 is a perspective view of a reinforcing bar connector applying an elliptical rotating wedge according to a fourth embodiment of the present invention.
Figure 17 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the fourth embodiment of the present invention.
18 is a longitudinal cross-sectional view of the coupled state of the reinforcing bar connector applying the elliptical rotating wedge according to the fourth embodiment of the present invention.
19 is a perspective view of the reinforcing bar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention is applied.
20 is a cutaway view of a sleeve of a rebar connector to which an elliptical rotating wedge according to a fifth embodiment of the present invention is applied.
21 is a perspective view and a side view of the wedge of the rebar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention.
Figure 22 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention.
Figure 23 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention.
24 is a longitudinal cross-sectional view of the coupled state of the reinforcing bar connector is applied to the elliptical rotary wedge consisting of a sleeve of another structure according to the fifth embodiment of the present invention.
25 is a perspective view of the reinforcing bar connector to which the elliptical rotating wedge according to the sixth embodiment of the present invention.
26 is a cutaway view of a sleeve of a reinforcing bar connector to which an elliptical rotating wedge according to a sixth embodiment of the present invention is applied.
Figure 27 is a perspective view of the coupling state of the reinforcing bar connector to which the elliptical rotating wedge according to the sixth embodiment of the present invention.
28 is a longitudinal cross-sectional view of the coupled state of the reinforcing bar connector applying the elliptical rotating wedge according to the sixth embodiment of the present invention.

In order to achieve the above object, the first embodiment of the present invention is made of a tubular body having an outer surface of a cross section of an ellipsoidal transverse direction in the center of a large diameter and a reinforcing portion having two circular through holes in parallel in the longitudinal direction therein. A sleeve formed with a wedge pressure inlet consisting of a curved accommodation portion penetrated by a circular hole and a circular through hole penetrated in a transverse direction at the center of the small diameter; A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

In addition, in order to achieve the above object, the second embodiment of the present invention, the outer surface of the cross section is made of an ellipsoidal tube in the transverse direction in the center of the reinforcement portion and a large diameter of the inner diameter of the one longitudinal through-hole A sleeve formed with a wedge pressure inlet formed of a penetrated bend receiving portion and a circular through hole penetrated in the transverse direction at the center of the small diameter; A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

In addition, the third embodiment of the present invention in order to achieve the above object, the outer surface of the cross section is made of an ellipsoidal tubular transverse direction in the center of the reinforcement portion and a large diameter consisting of one elliptical through hole in the longitudinal direction therein. A sleeve having a wedge pressure inlet formed of a curved accommodation portion formed by a groove having opposing opposite inner surfaces formed deeper than an inner surface of the reinforcing rod portion and a circular through hole penetrated in the transverse direction at the center of the small diameter; A wedge having an ellipsoidal cross-section (bar) formed with a sharp spline in the longitudinal direction on the outer surface thereof, the leading end being made of an inclined surface that becomes thinner and narrower in width toward the end and is drawn into the wedge pressure inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

In addition, the fourth embodiment of the present invention in order to achieve the above object, the outer surface of the cross section is made of an elliptical tube in the transverse direction in the center of the reinforcement portion and the small diameter consisting of one oval through hole in the longitudinal direction therein. A sleeve having a wedge pressure inlet formed of a penetrating circular through hole; A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

In addition, in order to achieve the above object, the fifth embodiment of the present invention is made of a tubular body having a circular cross section, and a reinforcing bar insert portion consisting of a circular through hole in the longitudinal direction therein and both inner surfaces of a diagonal position in a transverse direction. A sleeve having a two-part wedge pressure inlet consisting of a two-way bend receiving portion formed with a groove deeper than the inner surface of the portion and a circular through hole penetrating in the transverse direction while projecting outwardly at a position opposite the two-way bending receiving portion; ; The cross section is made of bar with oval shape. The tip is thinner toward the end, so the tip is flat and pointed, so that one side is formed parallel to the outer side and the other side is narrower to the end and narrower. Two wedges, each of which is formed as an inclined surface and has a sharp spline in the longitudinal direction on the inclined surface side of the outer surface and is pressed into the wedge inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

In addition, in order to achieve the above object, the sixth embodiment of the present invention is made of a tubular body having a circular cross section, and a reinforcing bar portion formed of a circular through hole in the longitudinal direction therein and two portions of which both sides of the diagonal position cross the horizontal direction are penetrated. A sleeve having two wedge pressure inlets formed of a circular through hole penetrating in a transverse direction while protruding outwardly at a position facing the curved accommodation part of the two parts; The cross section is made of bar with oval shape. The tip is thinner toward the end, so the tip is flat and pointed, so that one side is formed parallel to the outer side and the other side is narrower to the end and narrower. Two wedges, each of which is formed as an inclined surface and has a sharp spline in the longitudinal direction on the inclined surface side of the outer surface and is pressed into the wedge inlet of the sleeve; It can be achieved by a reinforcing bar connector applying an elliptical rotary wedge characterized in that it comprises a.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of the rebar connector to which the elliptical rotary wedge according to the first embodiment of the present invention, Figure 2 is a sleeve of the rebar connector to which the elliptical rotary wedge according to the first embodiment of the present invention 3 is a perspective view and a side view of the wedge of the rebar connector to which the elliptical rotary wedge according to the first embodiment of the present invention, Figure 4 is a rebar connector to which the elliptical rotary wedge according to the first embodiment of the present invention Perspective and side views of another wedge of Figure 5 is a perspective view of the coupled state of the reinforcing bar connector applying the elliptical rotary wedge according to the first embodiment of the present invention, Figure 6 is an elliptical rotary wedge according to the first embodiment of the present invention Longitudinal sectional view of the engaged state of the rebar connector.

As shown in Figures 1 to 5, the reinforcing bar connector to which the elliptical rotary wedge according to the first embodiment of the present invention is formed, the outer surface of the cross section is made of an elliptical tubular body is provided with two circular through holes in parallel in the longitudinal direction therein Two reinforcing bars (4) to be connected are inserted at both ends so that the reinforcing bars (11) overlapping the ends of the reinforcing bars and the bend receiving part (12) consisting of a through hole penetrated in the transverse direction at the center of the large diameter and the small diameter A sleeve (1) formed with a wedge pressure inlet (13) formed of a circular through hole formed in a transverse direction at a central portion thereof; The cross section is composed of an ellipsoidal bar, and the entire surface has the same diameter, and a sharp spline 21 is formed in the longitudinal direction throughout the outer surface, and the tip portion 23 becomes thinner and narrower toward the end. It is made of an inclined surface and is flat, and is pressed through the wedge inlet 13 of the sleeve (1) while penetrating between the ends of the two reinforcing bars (4) inserted into the reinforcing rod insertion portion 11 of the two reinforcing bars (4) A wedge 2 which integrally fixes the sleeve 1 and the reinforcing bar 4 by bending an end portion to the bend receiving portion 12; It is made, including.

The reinforcing part 11 of the two parts in the sleeve 1 is a part in which the two reinforcing bars are inserted from opposite directions, respectively, and an improved part 14 having rounded inlet edges is formed. Since the two reinforcing bars connecting the two reinforcing bars by pressing the wedge 2 into the sleeve 1 are not on the same axis but are eccentric, when the tensile load acts on the two reinforcing bars, the ends of the two reinforcing bars are rotated. Bends around both ends of the sleeve 14, the two reinforcing bars 4 lie on the same axis. At this time, the reinforcing bars in contact with the improvement 14 are not bent sharply but bent roundly, thereby weakening the tensile strength of the bent part. To prevent it. In addition, when the portion in which the improvement part 14 is formed in the sleeve 1 is formed long, the bending angle of the reinforcing bar becomes small to prevent the weakening of the tensile strength. Of course, the length of the sleeve can be increased in all lengths, but the unnecessary material cost can be reduced by omitting portions that do not affect the connection strength.

The inner diameter of the reinforcing portion 11 of the two parts may be formed in the same size to connect the reinforcing bars of the same size or in a different size to connect the reinforcing bars of different specifications. In addition, since the bend receiving portion 12 is formed in the sleeve 1 and the wedge 2 is press-fitted, the reinforcing end portion is bent into the bend receiving portion 12. It is also possible to connect thick rebars with different diameters.

As shown in FIGS. 5 to 6, when the two reinforcing bars 4 are inserted into the reinforcing bar insertion part 11 of the sleeve 1 and the wedge 2 is pressed into the wedge inlet 13, the reinforcing bar parts contacting the wedges are formed. The two reinforcing bars 4 are firmly fixed to the sleeve 1 while being bent in the bending receiving portion 12 direction.

The wedge pressure inlet 13 is composed of a circular through hole consisting of an inner diameter slightly larger than the diameter of the wedge 2 in the transverse direction at the center of the small diameter.

The wedge (2) is made of the same diameter over the entire length in the form of a bar (bar) of the cross-section as shown in Figure 3, one end is made of an inclined surface that becomes thinner and thinner width toward the end of the flat pointed The tip end portion 23 is the other end is the holding portion 22 made of an elliptical surface and the vertex in the longitudinal direction of the entire outer surface is made of a sharp spline 21. The formation direction of the flat and pointed tip 23 of the wedge 2 is formed in the large radial direction of an ellipse, as shown in FIGS.

The pointed tip 23 of the wedge 2 facilitates entry between two overlapping rebars and the small diameter side of the elliptical wedge 2 is pressed in contact with the two rebars 4.

As shown in FIG. 6, when the wedge 2 is press-fitted into the wedge inlet 13 of the sleeve 1 in which two rebars are inserted into the reinforcing bar insertion portion 11 of the sleeve 1 using a hydraulic wedge indenter, As the sharp vertices of the spline dig into the reinforcing bars, the reinforcing bars are firmly fixed to the sleeve, and when the tensile load acts on both ends of the two bars connected by the sleeve (1) and the wedge (2), the wedges (2) engaged with the reinforcing bars rotate. As the larger diameter portion of the wedge gradually comes into contact with the reinforcing bars, the reinforcing bars are bent more into the bend receiving portion 12 so that the reinforcing bars are more firmly fixed to the sleeve.

In addition, the structure of the wedge 2a can improve the workability of the wedge indenter by forming the paper holding part 22 in the shape of a bolt head larger than the main body, as shown in FIG.

Hereinafter, the coupling and operation relationship of the first embodiment of the present invention will be described with reference to FIG.

First, the ends of the reinforcing bars 4 are respectively press-fitted into the reinforcing bar inserting portions 11 at both ends of the sleeve 1 so that the ends of the reinforcing bars protrude shortly through the reinforcing bar inserting portions 11 of the sleeve 1. Let the ends overlap.

Subsequently, the wedge 2 is inserted with the tip portion 23 in front of the wedge inlet 13 of the sleeve 1, and both sides of the small diameter are inserted in contact with the two reinforcing bars 4. Then, using the hydraulic wedge presser, the presser part 22 of the wedge 2 is pressed so that the tip of the wedge passes between the two bars and slightly protrudes to the opposite wedge inlet.

When the wedge 2 is strongly pressed between the two bars through the wedge inlet 13, the ends of the two bars are bent into the bending receiving portion 12, respectively, and the reinforcing bars 4 are integrally fixed to the sleeve 1. The sharp part of the spline 21 of the wedge 2 penetrates the outer surface of the reinforcing bar to strongly couple the two bars 4 to the sleeve 1.

In addition, as shown in FIG. 6, when a tensile load is applied in both ends of two rebars, the wedge 2 rotates in the direction of the arrow while the large diameter side surface of the wedge having an elliptical cross section comes into contact with the reinforcing bars and ends of the two rebars. By further bending to the bending receiving portion 12, as the tensile load is applied to the joints of the two reinforcement of the coupling force of the sleeve 1 and the two reinforcement (4) is strengthened.

The second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

7 is a perspective view of the reinforcing bar connector to which the elliptical rotating wedge according to the second embodiment of the present invention, Figure 8 is a sleeve of the rebar connector to which the elliptical rotating wedge according to the second embodiment of the present invention 9 is a perspective view of the coupling state of the reinforcing bar connector applying the elliptical rotating wedge according to the second embodiment of the present invention, Figure 10 is a coupling of the reinforcing bar connector applying the elliptical rotating wedge according to the second embodiment of the present invention It is a longitudinal cross-sectional view of a state.

As shown in Figure 7 to 10, the reinforcing bar connector to which the elliptical rotating wedge according to the second embodiment of the present invention is made of a tubular shape of the outer surface of the cross-section to form a through-hole in the longitudinal direction therein to connect The two reinforcing bars are inserted at both ends, and the reinforcing bar insertion portion 11a having the ends overlapped with each other and a bent receiving portion 12a consisting of a through hole penetrated in the transverse direction at the center of the large diameter and a circularly penetrated in the transverse direction at the center of the small diameter A sleeve 1a formed with a wedge pressure inlet 13a formed of a through hole; The cross section is composed of an ellipsoidal bar, and the entire surface has the same diameter, and a sharp spline 21 is formed in the longitudinal direction throughout the outer surface, and the tip portion 23 becomes thinner and narrower toward the end. It consists of an inclined surface and is pointed flat, and pressed through the wedge inlet 13 of the sleeve (1a) and penetrates between the ends of the two reinforcing bars (4) inserted into the reinforcing bar insertion portion 11 of the two bars (4) Wedges (2) integrally fixing the sleeve (1a) and the reinforcing bar (4) by bending the end portion to the bend receiving portion (12); It is made, including.

As shown in FIG. 8, the structure of the sleeve 1a according to the second embodiment of the present invention is almost the same as that of the sleeve 1 of the first embodiment, and only the reinforcing bar portion 11a is formed without a partition in the middle. The oval aperture is another feature and the action and effect are the same.

As such, when the reinforcing bar insertion portion is formed in one through hole in the structure of the sleeve 1a, the manufacturing process is simpler than that of the sleeve 1 of the first embodiment and thus can be easily manufactured.

The structure of the wedge 2 according to the second embodiment of the present invention is the same as the structure of the wedge 2 according to the first embodiment.

Coupling and operating relationship of the rebar connector according to the second embodiment of the present invention is the same as the first embodiment as shown in FIG.

The third embodiment of the present invention will be described in detail with reference to the accompanying drawings.

11 is a perspective view of the rebar connector to which the elliptical rotary wedge according to the third embodiment of the present invention, Figure 12 is a sleeve of the rebar connector to which the elliptical rotary wedge according to the third embodiment of the present invention 13 is a perspective view of the coupling state of the reinforcing bar connector applying the elliptical rotating wedge according to the third embodiment of the present invention, Figure 14 is a coupling of the reinforcing bar connector applying the elliptical rotating wedge according to the third embodiment of the present invention Figure 15 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector applying an elliptical rotary wedge made of a sleeve of another structure according to the third embodiment of the present invention.

As shown in Figure 11 to 15, the reinforcing bar connector to which the elliptical rotary wedge according to the third embodiment of the present invention is formed, the outer surface of the cross section is made of a tubular shape of the elliptical cross section to form a through-hole in the longitudinal direction therein Reinforcing portion 11b which is inserted at both ends to overlap the reinforcement portion and the inner side of the reinforcing portion (11b) is formed in a groove that is deeply opposite the inner surface of the reinforcing portion (11b) 12b) and a sleeve 1b having a wedge inlet 13b formed of a circular through hole penetrating in the transverse direction at the center of the small diameter; The cross section is composed of an ellipsoidal bar, and the entire surface has the same diameter, and a sharp spline 21 is formed in the longitudinal direction throughout the outer surface, and the tip portion 23 becomes thinner and narrower toward the end. It is made of an inclined surface flat and pointed through the wedge inlet 13 of the sleeve (1b) while penetrating between the ends of the two reinforcing bars (4) inserted into the reinforcing bar insertion portion 11 of the two bars (4) A wedge 2 which integrally fixes the sleeve 1b and the reinforcing bar 4 by bending an end portion to the bend receiving portion 12; It is made, including.

As shown in Figs. 12 and 14, the structure of the sleeve 1b according to the third embodiment of the present invention is almost the same as the sleeve 1a of the second embodiment, and only the inner surface of the both sides of which is blocked while the bend receiving portion is blocked is reinforced. It is another feature that the bending receiving portion 12b formed of a groove deeper than the inner surface of the insertion portion 11b is formed, and its operation and effect are the same.

The structure of the wedge 2 according to the third embodiment of the present invention is the same as the structure of the wedge 2 according to the first embodiment.

Meanwhile, as shown in FIG. 15, the inner surface of the bending receiving portion 12b1 of the sleeve 1b1 is formed by an arc and a plurality of threaded locking portions 15 are formed to form a wedge between two bars inserted into the reinforcing bar insertion portion. 2) Since the curved outer surface of the reinforcing bar is tightly coupled to the inner surface of the bend receiving part 12b1, the sleeve 1b1 can more firmly bind the reinforcing bar than when the bent part is made of a through hole or a wide groove. Will be.

Coupling and operating relationship of the rebar connector according to the third embodiment of the present invention is the same as the first embodiment as shown in FIG.

The fourth embodiment of the present invention will be described in detail with reference to the accompanying drawings.

16 is a perspective view of the rebar connector to which the elliptical rotary wedge according to the fourth embodiment of the present invention, Figure 17 is a coupling state of the rebar connector to which the elliptical rotary wedge according to the fourth embodiment of the present invention 18 is a longitudinal sectional view of the coupled state of the reinforcing bar connector to which the elliptical rotary wedge according to the fourth embodiment of the present invention is applied.

16 to 18, the reinforcing bar connector to which the elliptical rotating wedge according to the fourth embodiment of the present invention is formed, the outer surface of the cross section is made of a tubular shape of the elliptical cross section to form a single through-hole in the longitudinal direction therein. A sleeve 1c having a reinforcing bar insertion portion 11c having two reinforcing bars inserted at both ends thereof and having an end portion overlapped with a wedge pressure inlet 13c formed of a circular through hole penetrating in the transverse direction at the center of the small diameter; The cross section is composed of an ellipsoidal bar, and the entire surface has the same diameter, and a sharp spline 21 is formed in the longitudinal direction throughout the outer surface, and the tip portion 23 becomes thinner and narrower toward the end. It consists of an inclined surface and is pointed flat and pressed through the wedge inlet 13 of the sleeve (1c) and penetrates between the ends of the two reinforcing bars (4) inserted into the reinforcing rod insertion portion 11 of the two reinforcing bars (4) A wedge 2 which integrally fixes the sleeve 1c and the reinforcing bar 4 by bending an end portion to the bend receiving portion 12; It is made, including.

As shown in Figs. 16 and 18, the structure of the sleeve 1c according to the fourth embodiment of the present invention is almost the same as the sleeve 1a of the second embodiment, and only for bending water on both sides in the transverse direction of the reinforcing bar insertion portion. Another feature is that no additional parts are provided. In addition, although not shown, it is also possible to form a screw-shaped locking portion on the inner surface of the reinforcing rod insertion portion.

The structure of the wedge 2 according to the fourth embodiment of the present invention is the same as that of the wedge 2 according to the first embodiment.

In the fourth embodiment of the present invention, when the wedge 2 is press-fitted between two rebars inserted into the reinforcing bar portion 11c of the sleeve 1c, the outer surface of the reinforcing bar 4 is formed by both sides of the reinforcing bar portion 11c. It is pressed and firmly combined with the sleeve 1c. As such, the sleeve 1c is not provided with a bend receiving portion, and thus the bonding force is weaker than that of the reinforcing bar connectors of the first to third embodiments. Therefore, the sleeve 1c may be applied to the reinforcement of the structure to allow relatively weak tensile strength. ), The manufacturing process is reduced because of the simple manufacturing process.

Coupling and operating relationship of the reinforcing bar connector according to the fourth embodiment of the present invention is almost the same as the first embodiment as shown in FIG. As the outer surface of the large diameter of the wedge is brought into contact with the reinforcing bar 4 by the rotation of the wedge 2, the reinforcing bar is more strongly pressed with both inner surfaces of the sleeve 1c, so that the reinforcing bar is more firmly coupled with the sleeve.

The fifth embodiment of the present invention will be described in detail with reference to the accompanying drawings.

19 is a perspective view of the rebar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention, Figure 20 is a sleeve of the rebar connector to which the elliptical rotating wedge according to the fifth embodiment of the present invention 21 is a perspective view and a side view of the wedge of the rebar connector to which the elliptical rotary wedge according to the fifth embodiment of the present invention, Figure 22 is a rebar connector to which the elliptical rotary wedge according to the fifth embodiment of the present invention 23 is a perspective view of the coupled state, Figure 23 is a longitudinal cross-sectional view of the coupling state of the reinforcing bar connector to which the elliptical rotary wedge according to the fifth embodiment of the present invention, Figure 24 is a rebar to which the elliptical rotary wedge according to the fifth embodiment of the present invention Longitudinal cross-sectional view of the engaged state of a rebar connector with an elliptical rotating wedge made of a sleeve of another structure of the connector.

19 to 24, the reinforcing bar connector to which the elliptical rotary wedge according to the fifth embodiment of the present invention is formed, the tubular body having a circular cross section is formed in the longitudinal direction inside the two reinforcing bars to connect 11d of reinforcing bars inserted at both ends and a groove having two grooves in which the inner surfaces at both sides of a diagonal position in the transverse direction are deeper than the inner surface of the reinforcing bars and the bent receiving portions of the two parts ( A sleeve (1d) formed with two portions of the wedge inlet (13d) consisting of a circular through hole penetrating in the transverse direction while protruding outwardly at a position opposite to 12d); The cross section is composed of bars of oval shape and has the same diameter as the whole, and the tip portion 23d becomes thinner and narrower in width toward the end portion, so that the end portion is flat and pointed so that one side is parallel to the outer surface. It is formed of (24d) and the opposite side is formed of the inclined surface (25d) lowered toward the end, the spline is formed in the longitudinal direction sharp vertex on the same side as the inclined surface (25d) of the outer surface and the wedge pressure inlet of the sleeve (1d) The sleeve 1d and the reinforcing bar 4 are integrally fixed by penetrating through the 13d and penetrating the side of the reinforcing bar inserted into the reinforcing bar insertion part 11d to bend the end of the reinforcing bar with the bending receiving part 12d. Two wedges 1d; It is made, including.

The sleeve 1d is a structure for connecting two bars 4 to be connected in a straight line, and is different from the overlapping method of the first to fourth embodiments.

The inner diameter of the reinforcing portion 11d of the two parts may be formed in the same size to connect the reinforcing bars of the same standard or in different sizes to connect the reinforcing bars of different specifications.

Pin inlet 16 formed of a transverse through-hole is formed in the center of the sleeve (1d) and the split pin (3) is inserted to restrict the entry of the reinforcing bars inserted at both ends of the sleeve (1d) to both reinforcing bars Make sure that it is inserted stably at (11d).

The reinforcing portion 11d of the two portions is a portion in which the two reinforcing bars are inserted from opposite directions, respectively, and an improved portion 14d rounded at the inlet corner is formed to facilitate the insertion of the reinforcing bars.

As shown in Figs. 20 and 23, the wedge pressure inlets 13d each having two reinforcing bars inserted into the reinforcing rod portions 11d at both ends of the sleeve 1d and having a circular through hole slightly larger than the diameter of the wedge 2d. Pressing the wedge (2d) with the wedge indenter through the b) bends the reinforcing bar end in contact with the wedge (2d) to the bending receiving portion (12d) so that both bars are firmly fixed to the sleeve (1d).

On the other hand, as shown in FIG. 24, when the inner surface of the bend receiving portion 12d1 of the sleeve 1d1 is formed in an arc and a plurality of threaded locking portions 15d are formed, the wedge 2d is pushed in with the reinforcing bar insertion portion. Since the bent outer surface of the closely coupled with the inner surface of the bend receiving portion (12d1) it is possible to more firmly bond the reinforcing bar (1d1) than when the bent portion is made of a through hole or a wide groove.

In addition, although not shown in the sleeve, the wedge inlet is formed in two parts on each side of the sleeve, so that the sleeve and the reinforcing bar can be more firmly connected.

As shown in Fig. 21, the long direction of the tip of the tip of the wedge (23d) is formed in a large oval large radial direction and the width becomes smaller toward the end, one side of the tip is parallel to the side of the wedge spline is formed The inclined surface 25d is formed in the parallel surface 24d and the opposite side is formed in the inclined surface 25d lowering toward the end so that the inclined surface 25d is pressed in the reinforcing direction when press-fitted into the wedge inlet 13d of the sleeve 1d. Since the bend-receiving portion 12d of the sleeve 1d is flat, the tip end portion of the wedge 2d in contact with the place is also formed in a parallel surface 24d so that the wedge 2d press-fitted into the wedge inlet 13d is not tilted and is vertical. It is possible to press-fit in order to be able to use the wedge indenter.

19 and 23, when the wedge 2d is press-fitted into the wedge inlet 13d, the spline-formed side is in contact with the reinforcing bar on both sides of the small diameter, and the side without the spline is the sleeve 1d. By contacting the inner surface of the wedge pressure inlet (13d) of) the frictional resistance to the rotation of the wedge (2d) is reduced when the tensile load is applied to the two bars, so the wedge easily rotates, so the large diameter side of the wedge presses the steel bar The reinforcing bar end is further bent into the bend receiving portion 12d to reinforce the coupling force between the sleeve and the reinforcing bar.

As shown in FIG. 23, in the process of pressing the wedge 2d between the two rebars 4 with a strong force by the hydraulic wedge indenter, the sharp vertices of the spline of the wedge dig into the reinforcing bars to strongly fix the rebar with the sleeve. And when the tensile load acts on the two bars connected to the sleeve and the wedge and pulled in both directions, the wedge engaged with the rebar rotates, and the larger diameter portion of the wedge gradually comes into contact with the rebar to bend the reinforcing bar into the flex receiving part 12. The reinforcing bar is firmly fixed to the sleeve.

Hereinafter, the coupling and operation relationship of the present invention will be described with reference to FIG.

First, the ends of the reinforcing bars are respectively pressed into the reinforcing bar insertion portions 11d at both ends of the sleeve 1d and pushed until the ends of the reinforcing bars contact the split pins 3.

Subsequently, the wedge 2d is inserted in front of the wedge inlet 13d of the sleeve 1d, and the wedge 2d is inserted and the wedge is pressed with a wedge indenter so that the tip slightly protrudes into the wedge inlet on the opposite side of the sleeve.

As such, when the wedge 2d is pressed strongly with the wedge indenter using the hydraulic method as the reinforcing inlet of the sleeve 1d, the ends of the two reinforcing bars are bent into the bending receiving portion 12d, and the sleeve and the reinforcing bar are tightly coupled. The sharp vertices of the spline dig into the outer surface of the reinforcing bar to strongly bond the two bars to the sleeve.

On the other hand, when a tensile load is applied to both rebars in both directions, the wedge 2d rotates in the direction of the arrow while the large diameter spline of the wedge comes into contact with the reinforcing bars, so that the ends of the two reinforcing bars are further bent to the bending receiving portion 12d. Strengthen the bond between the sleeve and the two rebars.

The sixth embodiment of the present invention will be described in detail with reference to the accompanying drawings.

25 is a perspective view of the rebar connector to which the elliptical rotary wedge according to the sixth embodiment of the present invention, Figure 26 is a sleeve of the rebar connector to which the elliptical rotary wedge according to the sixth embodiment of the present invention Fig. 27 is a perspective view of the coupling state of the reinforcing bar connector applying the elliptical rotating wedge according to the sixth embodiment of the present invention, Figure 28 is a coupling of the reinforcing bar connector applying the elliptical rotating wedge according to the sixth embodiment of the present invention It is a longitudinal cross-sectional view of a state.

As shown in Figures 25 to 28, the reinforcing bar connector to which the elliptical rotating wedge according to the sixth embodiment of the present invention is made of a tubular body having a circular cross section therein is formed with two circular bars in the longitudinal direction therein to connect the two bars The reinforcing bar portion 11e inserted at both ends and the bent receiving portion 12e of the two portions through which both inner surfaces of the diagonal position are laterally penetrated and the bent receiving portion 12e of the two portions are moved outwardly. A sleeve 1e having a two-part wedge inlet 13e formed of a circular through hole protruding in a transverse direction; The cross section is composed of bars of oval shape and has the same diameter as the whole, and the tip portion 23d becomes thinner and narrower in width toward the end portion, so that the end portion is flat and pointed so that one side is parallel to the outer surface. It is formed of (24d) and the opposite side is formed of the inclined surface 25d lowered toward the end, and the spline is sharply formed in the longitudinal direction on the same side as the inclined surface (25d) of the outer surface and the wedge pressure inlet of the sleeve (1e) The sleeve 1e and the reinforcing bar 4 are integrally fixed by penetrating through the 13e and penetrating the side of the reinforcing bar inserted into the reinforcing bar insertion part 11e to bend the end of the rebar with the bend receiving part 12e. Two wedges 1d; It is made, including.

As shown in Figs. 26 and 28, the structure of the sleeve 1e according to the sixth embodiment of the present invention is almost the same as the sleeve 1d of the fifth embodiment, and only the bend receiving portion 12e is formed by a hole. The indentation of 2d causes the end of the reinforcing bar to bend to the bend receiving portion 12e so that the two bars are firmly coupled to the sleeve 1e.

The structure of the wedge 2d according to the sixth embodiment of the present invention is the same as that of the wedge 2d according to the fifth embodiment.

Coupling and operating relationship of the rebar connector according to the sixth embodiment of the present invention is the same as the fifth embodiment as shown in FIG.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the present invention, and such modifications and variations are patents of the present invention. It is obvious that the claims belong.

Industrial applications of the reinforcing bar connector using the elliptical rotary wedge according to the present invention is very diverse and look at the representative fields of the following.

First, the bridge construction constructed by the precast method has a structure in which the pier is installed, the girder is installed on the upper part of the bridge, and the top plate is installed on the girder. In order to stably fix the multiple girders, the girders are connected in the longitudinal direction. The reinforcing bars fixed to the side of the girders are limited in length, so they cannot be adjusted in length. Can not be connected using a screw connection method or a conventional mechanical joint method, so that the rebar is cut to fit the distance between the girders, and the reinforcing bar and the end of the reinforcing bar Or welding, but there was a problem that the joint is more vulnerable than the regulations. Possible to use the reinforced end connections apply the oval rotational wedge provided by the invention rapidly and rigidly connected to it is possible to satisfy both the economical efficiency and safety.

Second, the reinforcing bar is applied to the elliptical rotary wedge of the present invention for the same reason, because the reinforcing bar should be connected in the state of reinforcement in the road or bridge repair and expansion of the building.

Third, when connecting the spiral reinforcing bars and bands can be secured by using a reinforcing bar connector applied to the elliptical rotating wedge of the present invention to replace the binding line.

In addition to the fields listed above, when the length of the existing reinforcing bar is not adjusted or the overlap length is not secured and when connecting the reinforcing bar, both of the reinforcing bar joints applying the elliptical rotary wedge of the present invention are secured. Can be secured.

1, 1a, 1b, 1b1, 1c, 1d, 1d1, 1e: sleeve
11, 11a, 11b, 11b1, 11c, 11d, 11d1, 11e: rebar insertion part
12, 12a, 12b, 12b1, 12d, 12d1, 12e: bending accommodating part
13, 13a, 13b, 13b1, 13c, 13d, 13d1, 13e: wedge press
14, 14a, 14b, 14b1, 14c, 14d, 14d1, 14e: improved part
15, 15d: locking part
16: pin pressure inlet
2, 2a, 2d: wedge
21, 21d: Spline
22, 22d: Paper holding part
23, 23d: tip
24d: parallel plane
25d: slope
3: Split pin
4: rebar

Claims (12)

The outer surface of the cross section is made of an ellipsoidal tubular body with two circular holes in parallel in the longitudinal direction inside, a receptacle inserted in the transverse direction at the center of the large diameter and a transverse direction in the center of the small diameter A sleeve having a wedge pressure inlet formed of a circular through hole formed therein;
A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve;
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of. The outer surface of the cross section is made of an ellipsoidal tubular body with a reinforcing bar inserted into the longitudinal direction of one of the inner bars, a curved receiving part penetrated transversely in the center of a large diameter, and a circular through hole penetrating the center of a small diameter. A sleeve formed with a wedge pressure inlet;
A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve;
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of. Reinforcing part consisting of an oval tube with an outer surface of the cross section, and having a reinforcing part consisting of one elliptical through-hole in the longitudinal direction and a groove in which both inner faces facing each other in the transverse direction in the center of the large diameter are deeper than the inner part of the reinforcing part. And a sleeve having a wedge pressure inlet formed of a circular through hole penetrating in the transverse direction at the center of the small diameter;
A wedge having an ellipsoidal cross-section (bar) and having a sharp spline in the longitudinal direction on the outer surface thereof, and a distal end of which is made of an inclined surface that becomes thinner and narrower in width toward the end and is pressed into the wedge pressure inlet of the sleeve;
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of. The method of claim 1,
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that the inner diameter of the reinforcement portion of the two portions are formed in different sizes. The method of claim 3, wherein
Reinforcing bar connector applied to the elliptical rotary wedge, characterized in that the inner surface of the bent portion of the sleeve formed by an arc and a plurality of threaded engaging portion is formed. Reinforcement insertion part consisting of a circular tube having a circular cross section in the longitudinal direction therein, and a bending accommodating part and two parts consisting of a groove in which both inner surfaces of a diagonal position in the transverse direction are deeper than the inner surface of the reinforcing part insertion. A sleeve having a wedge inlet of two parts formed of a circular through hole penetrating in the transverse direction while protruding outwardly at a position facing the bend receiving portion of the;
The cross section is composed of an oval bar, and the tip end becomes thinner and narrower in width toward the end, so that the end is flat and pointed so that one side is formed as a parallel plane parallel to the outer surface and the opposite side is directed toward the end. Two wedges are formed in the inclined surface is lowered and the sharp spline is formed in the longitudinal direction on the inclined surface side of the outer surface and pressed into the wedge inlet of the sleeve;
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of Reinforcing bar insertion part consisting of a circular tube with a circular cross section in the longitudinal direction inside, and a two-sided bent receiving portion penetrating both sides of a diagonal position in the transverse direction and an outer side in a position facing the two-sided bending receiving portion A sleeve formed with a wedge inlet of two parts formed of a circular through hole protruding in a transverse direction;
The cross section is composed of an oval bar, and the tip end becomes thinner and narrower in width toward the end, so that the end is flat and pointed so that one side is formed as a parallel plane parallel to the outer surface and the opposite side is directed toward the end. Two wedges are formed in the inclined surface is lowered and the sharp spline is formed in the longitudinal direction on the inclined surface side of the outer surface and pressed into the wedge inlet of the sleeve;
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that consisting of The method according to claim 6 or 7,
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that the rounded improved portion is formed at the inlet edge of the reinforcing portion of the sleeve. The method according to claim 6 or 7,
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that the pin inlet formed of a transverse through-hole is formed in the center of the sleeve is inserted into the split pin. The method according to claim 6 or 7,
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that the wedge inlet is formed in each of the two parts on both sides of the sleeve. The method according to claim 6 or 7,
Reinforcing bar connector applying an elliptical rotary wedge, characterized in that the inner diameter of the reinforcement portion of the two portions are formed in different sizes. The method according to claim 6,
Reinforcing bar connector applied to the elliptical rotary wedge, characterized in that the inner surface of the bent portion of the sleeve formed by an arc and a plurality of threaded engaging portion is formed.
KR1020100056328A 2010-06-15 2010-06-15 Reinforcing bar coupler using an oval shaped rotational wedge KR100984243B1 (en)

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PCT/KR2011/004112 WO2011159049A2 (en) 2010-06-15 2011-06-06 Rebar coupler using an oblong rotating wedge

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KR101468037B1 (en) * 2013-03-04 2014-12-02 홍종국 The filler injection coupler for an iron reinforcing rod
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