KR102619146B1 - Locking Device of One-touch Coupler for Connecting Reinforcing Rods - Google Patents

Abstract

The present invention relates to a rebar locking device for a one-touch coupler for rebar joints that can secure the stability of a building by satisfying a residual strain of 0.3 mm or less. The rebar locking device for a one-touch coupler for rebar joints according to the present invention is located at one end. A plurality of coupler housings having an inlet through which a reinforcing bar is inserted, a tapered portion whose inner diameter gradually increases from the inlet to the opposite side of the inlet, and a first screw thread formed on the inner or outer peripheral surface of the other end; A joint member disposed between the plurality of coupler housings and having a second screw thread spirally coupled to the first screw thread of the coupler housing formed on the outer peripheral surface or inner peripheral surface of both ends to connect the plurality of coupler housings to each other; Each is inserted into the interior of the coupler housing, the outer surface is inclined at an angle corresponding to the tapered portion of the coupler housing and is in close contact with the tapered portion, and a plurality of locking grooves supported by the joints of the reinforcing bar are formed along the longitudinal direction on the inner surface. A plurality of pieces arranged at regular intervals; And, a compression spring disposed between one end of the piece and the joint member to elastically support the piece with respect to the joint member, wherein the locking groove of the piece has a shape corresponding to the node of the reinforcing bar, and the node of the reinforcing bar It is characterized in that it is arranged in a 1/n pitch of the pitch (P ₀ ) (where n is an integer of 2 or more).

Description

Reinforcement locking device of one-touch coupler for connecting reinforcing rods to minimize residual strain {Locking Device of One-touch Coupler for Connecting Reinforcing Rods}

The present invention relates to a one-touch coupler for joining reinforcing bars, and more specifically, to minimize the amount of residual strain by forming the shape of the groove of the single body of the one-touch coupler, which inserts and connects both ends of the reinforcing bars, into a shape that matches the shape of the joints of the reinforcing bars. This relates to the rebar locking device of the one-touch coupler for rebar joints.

A rebar joint refers to a case where two rebars are connected and used because the length of the rebar is short. In this case, tensile or compressive force is transmitted by the attachment of the rebar and concrete at the joint.

A one-touch coupler is a type of coupler that can simply connect two reinforcing bars firmly by simply inserting the reinforcing bars into both ends of the coupler without processing the ends of the reinforcing bars. A typical one-touch coupler consists of a housing, a single body, a spring, a joint, etc., and when tension is applied to both ends of the rebar, the single body falls off along an inclined plane and the fastening occurs in the form of the reinforcing bar biting into place.

Therefore, the one-touch coupler is a type of fastening method that inevitably involves residual deformation because it is a fastening method that uses the initial slip of the reinforcing bar.

In the case of one-touch couplers, they have the advantage of having excellent stability compared to lap joints and superior constructability compared to screw-type couplers (easy construction and significant reduction in construction time). However, as mentioned above, due to the principle of one-touch, initial slip occurs and the residual strain is low. There is a very big drawback.

When a large load such as an earthquake is applied to a building, it is difficult to ensure the stability of the building due to this initial slip. In October 2020, the Ministry of Land, Infrastructure and Transport's "Quality Control Guidelines" revised the regulations so that mechanical rebar joints must meet a residual strain of 0.3 mm or less.

Therefore, there is an urgent need to develop a one-touch coupler that can suppress the increase in residual strain due to initial slip while maintaining the advantages of the existing one-touch coupler.

For reference, residual deformation refers to the amount of constant load (90 to 95% of the yield point of the base steel bar standard) compared to the state in which no load is applied (initial state) after performing a mechanical rebar joint (screw-type coupler joint or one-touch coupler joint). It refers to the amount of deformation when the load is removed after being applied.

In general, structures such as buildings must return to their original state when the load is removed after an external load is applied. However, the deformation that does not return and remains is called permanent deformation, which means that the shape of the structure changes.

In rebar joints, the amount of deformation is measured after various tests such as low-cycle fatigue test, static test, high-stress cyclic test, high-cycle fatigue test, etc., and the residual deformation is limited to 0.3 mm (0.2 mm for high-cycle fatigue test). I'm doing it.

Republic of Korea Patent No. 04622901 (registered on December 8, 2004) Republic of Korea Patent No. 10-1003302 (registered on December 16, 2010)

The purpose of the present invention is to provide a rebar of a one-touch coupler for rebar joints that has high structural strength and excellent constructability while optimizing the shape and spacing of the pieces that restrain the rebar to ensure the stability of the building by satisfying the residual strain of 0.3 mm or less. A locking device is provided.

The reinforcing bar locking device of the one-touch coupler for reinforcing bar joints according to the present invention for achieving the above object has an entrance into which the reinforcing bar is inserted at one end, and a tapered portion whose inner diameter gradually increases from the inlet to the opposite side of the inlet is formed. a plurality of coupler housings having first threads formed on the inner or outer peripheral surface of the other end portion; A joint member disposed between the plurality of coupler housings and having a second screw thread spirally coupled to the first screw thread of the coupler housing formed on the outer peripheral surface or inner peripheral surface of both ends to connect the plurality of coupler housings to each other; Each is inserted into the interior of the coupler housing, the outer surface is inclined at an angle corresponding to the tapered portion of the coupler housing and is in close contact with the tapered portion, and a plurality of locking grooves supported by the joints of the reinforcing bar are formed along the longitudinal direction on the inner surface. A plurality of pieces arranged at regular intervals; And, a compression spring disposed between one end of the piece and the joint member to elastically support the piece with respect to the joint member, wherein the locking groove of the piece has a shape corresponding to the node of the reinforcing bar, and the node of the reinforcing bar It is characterized in that it is arranged in a pitch of 1/n (where n is an integer of 2 or more).

The pyeonche may be made up of two pairs. In addition, the pyeonche may be composed of two or more pieces.

Between the tapered portion of the coupler housing and the outer surface of the piece, a guide protrusion and a guide groove through which the guide protrusion is inserted and guided extend along the longitudinal direction so that the piece can move only in the longitudinal direction and not in the circumferential direction. can be formed.

The reinforcing bar locking device of the one-touch coupler for reinforcing bar joints of the present invention protrudes between both ends of the two pieces on both sides of the tapered portion of the coupler housing and contacts both ends of the pieces, and the ribs of the reinforcing bars can be accommodated between the two pieces. It may further include a gap maintenance protrusion that forms a space and prevents the piece from being separated from the coupler housing.

In addition, as the rib of the reinforcing bar is inserted into the entrance portion of the coupler housing at a position corresponding to the gap maintaining protrusion, two positioning grooves that determine the insertion direction of the reinforcing bar may be formed to be spaced apart at 180 degree intervals.

When the nodes of the reinforcing bar are formed in a spiral shape, the locking groove formed in the knitted body is formed in a spiral shape corresponding to the nodes of the reinforcing bar.

According to the present invention, the locking grooves of the flat body have a shape corresponding to the joints of the reinforcing bars and are arranged at a pitch of 1/n of the pitch of the joints of the reinforcing bars (where n is an integer of 2 or more). In this way, if the locking groove of the flat body has a shape that matches the shape of the joints of the reinforcing bar and is formed at a pitch of 1/n of the pitch of the joints of the reinforcing bar, the nodes of the reinforcing bar are accurately inserted into the locking groove of the flat body and fixed. Because it is in a preformed state, even if a strong tensile force is applied to the rebar, the occurrence of initial slip can be minimized and the residual strain can be maintained below 0.3 mm.

Figure 1 is an exploded cross-sectional view showing a rebar locking device of a one-touch coupler for rebar joints according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the rebar locking device of the one-touch coupler for rebar joints shown in FIG. 1.
Figures 3a and 3b are diagrams showing various shapes of reinforcing bars.
FIG. 4 is a cross-sectional view showing the shape of the single body of the rebar locking device of the one-touch coupler for rebar joints shown in FIG. 1.
Figure 5 is a perspective view showing the shape of the pyeonche shown in Figure 4.
Figure 6 is a cross-sectional view of the coupler housing of the one-touch coupler for rebar joints shown in Figure 1.
Figure 7 is a front view of the coupler housing of the one-touch coupler for rebar joints shown in Figure 1.

Referring to the attached drawings, the reinforcing bar locking device of the one-touch coupler for reinforcing bar joints for minimizing residual strain according to an embodiment of the present invention will be described in detail. Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. In the attached drawings, the dimensions of the structures are enlarged from the actual size for clarity of the present invention, or reduced from the actual size to understand the schematic configuration.

Additionally, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

1 to 7 show a one-touch coupler for rebar joints according to an embodiment of the present invention. The one-touch coupler for rebar joints connects two coupler housings (10) in one set and two coupler housings (10). A joint member (20) is installed inside each coupler housing (10) and is in close contact with the outer surface of the reinforcing bar (1) inserted into the coupler housing (10) to firmly restrain the node (2) of the reinforcing bar (1). A compression spring 40 that is disposed between one end of the knit body 30 and the joint member 20 and elastically supports the knit body 30 with respect to the joint member 20. Includes.

The coupler housing 10 is made of a high-strength metal material in the form of a hollow cylindrical tube. At one end of the coupler housing 10, the inlet into which the reinforcing bar 1 is inserted is formed to be open to the outside, and a tapered portion 11 whose inner diameter gradually increases from the inlet to the opposite side of the inlet is formed, and the other end is formed. A first screw thread 12 for connection to the joint member 20 is formed on the inner or outer peripheral surface of the unit. In this embodiment, the first screw thread 12 has a female thread structure formed on the inner peripheral surface of the rear end of the coupler housing 10, but alternatively, it may be formed in a male thread structure on the outer peripheral surface of the rear end of the coupler housing 10.

In this embodiment, the two coupler housings 10 are arranged symmetrically at 180 degrees with the joint member 20 in between and are configured to connect the two reinforcing bars 1 in a straight line. However, unlike this, the joint member 20 is ' In the +' shape or 'ㅏ' shape, three or four coupler housings (10) can be simultaneously connected to one joint member (20), allowing three or four reinforcing bars (1) to be connected simultaneously.

The joint member 20 has a substantially cylindrical or circular ring shape and is disposed between a plurality of coupler housings 10. A second screw thread 22 is formed on the outer peripheral surface or inner peripheral surface of both ends of the joint member 20 and is spirally coupled to the first screw thread 12 of the coupler housing 10, thereby connecting the plurality of coupler housings 10 to each other. . That is, the first screw thread 12 of each coupler housing 10 is helically coupled to the second screw thread 22 of the joint member 20, so that the coupler housing 10 is connected to the joint member 20.

The piece 30 is located in the tapered portion 11 of the coupler housing 10 and functions to firmly restrain the node 2 of the reinforcing bar 1. For this purpose, the outer surface of the body 30 is formed to be inclined at an angle corresponding to the tapered portion 11 of the coupler housing 10, and at the same time, it is curved in the circumferential direction to come into close contact with the tapered portion 11, and the inner surface is formed with a reinforcing bar (1). ) A plurality of locking grooves (31) supported by engaging the nodes (2) are arranged at regular intervals along the longitudinal direction. Each piece of the two pieces 30 has a substantially semi-conical shape so that the two pieces 30 correspond to the shape (approximately conical) of the tapered portion 11 of the coupler housing 10.

In this way, since a plurality of locking grooves 31 in which the nodes 2 of the reinforcing bars 1 are inserted and restrained are arranged along the longitudinal direction in the knit body 30, the reinforcing bars 1 are inside the coupler housing 10. When a tensile force is applied outward in the axial direction to the reinforcing bar (1) in the inserted and restrained state, the node (2) of the reinforcing bar (1) is caught in the locking groove (31) of the flat body (30) and the flat body (30) is connected to the coupler housing. Pressure is applied to the outside of (10), and at this time, since the tapered portion (12) becomes narrower toward the outside in the axial direction, the pieces (30) act as a wedge, so that the reinforcing bar (1) does not fall out and is almost completely removed from the inside of the coupler housing (10). It is tightly restrained without moving.

The locking groove 31 of the piece 30 has a shape corresponding to the node 2 of the reinforcing bar 1, and the pitch P ₁ of the locking groove 31 is the node 2 of the reinforcing bar 1. ) of the pitch (P ₀ ) of 1/n pitch (where n is an integer of 2 or more, in this embodiment, 1/2 pitch). In this way, the locking groove 31 of the pylon body 30 has a shape that matches the shape of the node 2 of the reinforcing bar 1 and the pitch of the node 2 of the reinforcing bar 1 (P ₀ ). When formed at a 1/n pitch, the nodes 2 of the reinforcing bar 1 are accurately inserted into the locking groove 31 of the flat body 30 and are fixed, as shown in Figure 2, so the reinforcing bar 1 Even if a strong tensile force is applied, the initial slip can be minimized and the residual strain can be maintained below 0.3 mm.

In the existing flat body (30), the groove for restraining the node (2) of the reinforcing bar (1) is a simple triangular gear tooth or ratchet gear (regardless of the shape and pitch of the node (2) of the reinforcing bar (1)). When tension is applied to the reinforcing bar (1) in a structure in which irregularities in the form of ratchet gears are arranged at regular intervals, the residual strain exceeds 0.3 mm due to initial slip.

For reference, referring to FIGS. 3A and 3B, two ribs (3) are formed on the outer surface of the reinforcing bar (1) extending along the longitudinal direction at 180-degree intervals, and between each rib (3) in the horizontal direction. A plurality of extending nodes 2 are arranged at a constant pitch (P ₀ ) along the longitudinal direction. The node 2 of the reinforcing bar 1 may have a protrusion shape extending along the circumferential direction as shown in FIG. 3A. At this time, as shown in (A) of FIG. 3A, the nodes (2) arranged on both sides of the two ribs (3) may be arranged at the same position, but as shown in (B). The nodes 2 arranged on both sides of the two ribs 3 may be arranged to be staggered by 1/2 pitch, that is, with a phase difference of 1/2 pitch.

Alternatively, the nodes 2 of the reinforcing bar 1 may be formed in a spiral shape as shown in FIG. 3b. Of course, even when the nodes (2) are formed in a spiral shape, the nodes (2) on both sides may be arranged at the same position with respect to the ribs (3), but they are arranged with a phase difference of 1/2 pitch (1/2 P ₀ ). It could be.

The locking groove 31 of the piece 30 has the shape, size, and pitch of the joints 2 of the reinforcing bar 1 shown in FIGS. 3A and 3B, or the joints of the reinforcing bar 1 of known standard specifications. (2) It is formed in a shape and size corresponding to the shape and size, and the pitch (P ₁ ) of each locking groove (31) is 1/2 the pitch (P ₀ ) of the node (2) of the reinforcing bar (1). is formed by

As described above, the reason for arranging the spacing of the locking grooves 31 of the piece 30 at 1/2 pitch intervals of the nodes 2 of the reinforcing bar 1 is as shown in (B) of FIG. 3A. Likewise, even if the nodes (2) arranged on both sides of the reinforcing bar (1) are arranged alternately by 1/2 pitch, the nodes on both sides of the reinforcing bar (1) are in the plurality of locking grooves (31) formed in the two pieces (30). (2) This is to ensure that they are accurately engaged and restrained.

Between the tapered portion 11 of the coupler housing 10 and the outer surface of the piece 30, a guide projection 15 and a guide groove are provided so that the piece 30 can move only in the longitudinal direction and not in the circumferential direction. (32) is formed to extend along the longitudinal direction. The guide protrusion 15 is formed on the tapered portion 11 of the coupler housing 10, and the guide groove 32 may be formed on the outer surface of the knit body 30. However, on the contrary, the guide protrusion 15 is formed on the knit body ( 30) and a guide groove 32 may be formed in the tapered portion 11 of the coupler housing 10.

And when the reinforcing bar (1) is inserted into the coupler housing (10), the ribs (3) protruding in the longitudinal direction on both sides of the reinforcing bar (1) must enter between the two pieces (30) to form the joints (1) of the reinforcing bar (1). 2) can be accurately engaged with the locking groove 31 of the pyeonche 30. For this purpose, the tapered portion 11 of the coupler housing 10 protrudes between both ends of the two knits 30 on both sides, contacts the both ends of the knits 30, and is between both ends of the two knits 30. Two gap maintenance protrusions 16 may be formed to maintain the gap. The gap maintaining protrusion 16, like the guide protrusion 15, is formed to extend to a predetermined length along the longitudinal direction of the tapered portion 11. The two gap maintenance protrusions (16) are in contact with both ends of the two pieces (30) between the two pieces (30), and the two pieces (30) have a gap slightly larger than the width of the ribs (3) of the reinforcing bar (1). It is maintained to form a space in which the ribs 3 of the reinforcing bars 1 can be accommodated between the two pieces 30. At the same time, the gap maintenance protrusion 16 can prevent the knitted body 30 from flowing down through the inlet of the coupler housing 10 and exposing one end of the knitted body 30 to the outside.

In addition, when the node (2) of the reinforcing bar (1) is inserted between the two pieces (30), in order for the node (2) to be accurately inserted and engaged inside the locking groove (31), the ribs (3) of the reinforcing bar (1) must be 2. It is desirable to accurately enter between the two ends of the dog's pyeonche (30). Therefore, as shown in FIG. 7, two positioning grooves 17 that are guided by inserting the ribs 3 of the reinforcing bar 1 around the inlet portion of the coupler housing 10 can be formed at 180-degree intervals. . The positioning groove 17 is formed at a position corresponding to the gap maintaining protrusion 16 disposed between both ends of the two pieces 30, respectively.

Therefore, when the worker inserts the end of the reinforcing bar (1) into the outside of the inlet side of the coupler housing (10), the rib (3) of the reinforcing bar (1) is inserted into the positioning groove (17) exposed to the outside of the coupler housing (10). ) By inserting it at the end, the ribs (3) of the reinforcing bar (1) accurately enter between the two ends of the knitted body (30), and the joints (2) of the reinforcing bar (1) engage with the locking grooves (31) of the knitted body (30). It becomes possible.

Instead of the positioning groove 17, a specific mark indicating the insertion direction of the reinforcing bar 1 may be displayed on the entrance side of the coupler housing 10.

The compression spring 40 is disposed between the piece 30 and the joint member 20, so that one end is supported on one end of the piece 30 and the other end is supported on the joint member 20 and is attached to the joint member 20. On the other hand, elastic force is applied to the outer longitudinal direction of the knitted body 30 so that the knitted body 30 can be maintained in close contact with the tapered portion 11 of the coupler housing 10. The compression spring 40 can be configured by applying a coil spring that provides elastic force in a direction opposite to the compression direction during compression deformation, but can also be configured by applying a known leaf spring.

The one-touch coupler for rebar joints with this configuration works as follows.

When the positioning groove (17) formed at one end (entrance part) of the coupler housing (10) is aligned with the rib (3) of the reinforcing bar (1) and the reinforcing bar (1) is inserted, the joints (2) of the reinforcing bar (1) are While contacting the locking grooves 31 of the flat body 30, the flat body 30 enters while being pressed in the direction of movement of the reinforcing bar (1). At this time, since the tapered portion 11 of the coupler housing 10 becomes wider toward the inside in the longitudinal direction, the flat body 30 moves toward the joint member 20 while compressing the compression spring 40, so that the reinforcing bar 1 naturally moves. It can be inserted into the coupler housing 10.

At this time, the guide groove 32 formed on the outer surface of the piece 30 moves a predetermined distance only in the longitudinal direction while being guided by the guide projection 15 of the coupler housing 10.

When the reinforcing bar (1) is inserted into the joint member (20), the connection between the reinforcing bar and the coupler housing (10) is completed. At this time, when the worker removes the force pushing the reinforcing bar (1), the pieces (30) are pushed back toward the entrance of the coupler housing (10) by the strong elastic force of the compression spring (40) and come into close contact with the tapered portion (11). The joints (2) of the reinforcing bar (1) are inserted into the locking groove (31) of (30) and engaged with each other. Accordingly, the inner surface of the flat body 30 is strongly adhered to the outer surface of the reinforcing bar (1) and acts as a wedge to strongly constrain the reinforcing bar (1).

In this way, when a strong tensile force is applied to the reinforcing bar (1) while the reinforcing bar (1) is restrained in the coupler housing (10) by the piece (30), the nodes (2) of the reinforcing bar (1) are of the piece (30). Since it is inserted and restrained inside the locking groove 31, initial slip hardly occurs, and the residual deformation can be maintained below 0.3 mm, thereby ensuring the stability of the building. That is, since the locking groove 31 of the flat body 30 has almost the same shape as the node 2 of the reinforcing bar 1, when an external force is applied to the reinforcing bar 1 in the longitudinal direction, the node 2 of the reinforcing bar 1 ) is completely caught and restrained in the locking groove 31 of the flat body 30, so initial slip can be minimized.

In addition, between the tapered portion 11 of the coupler housing 10 and the outer surface of the piece 30, a guide projection 15 and a guide groove 32 are formed so that the piece 30 can move only in the longitudinal direction and not in the circumferential direction. ) is formed to extend along the longitudinal direction, and protrudes between both ends of the two pieces 30 on both sides of the tapered portion 11 of the coupler housing 10, making contact with both ends of the pieces 30 and forming two Since two gap-maintaining protrusions 16 are formed to maintain the gap between the two ends of the flat body 30, when the reinforcing bar 1 is inserted into the coupler housing 10 and connected, the bond between the flat body 30 and the reinforcing bar 1 is maintained. Accuracy can be improved.

At this time, when the positioning groove 17, which is guided by inserting the ribs 3 of the reinforcing bar 1 between both ends of the two pieces 30, is formed on the inlet side of the coupler housing 10, the reinforcing bar 1 When connecting by inserting ) into the coupler housing (10), the coupling accuracy between the piece (30) and the reinforcing bar (1) can be further improved.

In the above, the present invention has been described in detail with reference to examples, but those skilled in the art will be able to make various substitutions, additions, and modifications without departing from the technical spirit described above. It is natural, and such modified embodiments should also be understood as falling within the scope of protection of the present invention as defined by the patent claims attached below.

1: Reinforcing bar 2: Node
3: Rib 10: Coupler housing
11: Taper part 12: First thread
15: guide projection 16: gap maintenance projection
17: Positioning groove 20: Joint member
22: second thread 30: single body
31: Locking groove 32: Guide groove
40: Compression spring

Claims (6)

An inlet through which reinforcing bars are inserted is formed at one end, a tapered portion 11 whose inner diameter gradually increases from the inlet to the opposite side of the inlet is formed, and a first screw thread 12 is formed on the inner or outer peripheral surface of the other end. A plurality of coupler housings (10);
It is disposed between the plurality of coupler housings 10, and a second screw thread 22 is formed on the outer peripheral surface or inner peripheral surface of both ends and is helically coupled to the first screw thread 12 of the coupler housing 10, forming a plurality of coupler housings. A joint member (20) connecting (10) to each other;
Each is inserted into the interior of the coupler housing 10, and the outer surface is formed to be inclined at an angle corresponding to the tapered portion 11 of the coupler housing 10 and is in close contact with the tapered portion 11, and a reinforcing bar (1) is provided on the inner surface. A pair of pyeonche (30) in which a plurality of locking grooves (31) supported by the nodes (2) are arranged at regular intervals along the longitudinal direction; and,
A compression spring 40 disposed between one end of the knit body 30 and the joint member 20 to elastically support the knit body 30 with respect to the joint member 20;
Including,
The locking groove 31 of the piece 30 has a shape corresponding to the node 2 of the reinforcing bar 1, and is 1/n of the pitch (P ₀ ) of the node 2 of the reinforcing bar 1. Arranged by pitch (where n is an integer greater than or equal to 2),
A guide protrusion 15 and the guide are provided on each of the tapered portion 11 of the coupler housing 10 and the outer surface of the knit 30 so that the knit 30 can move only in the longitudinal direction and not in the circumferential direction. A guide groove 32 into which the protrusion 15 is inserted and guided is formed to extend along the longitudinal direction,
On both sides of the tapered portion 11 of the coupler housing 10, a reinforcing bar (1) protrudes between both ends of the two pieces 30 and contacts both ends of the pieces 30, and is provided between the two pieces 30. A gap maintenance protrusion 16 is formed to form a space in which the ribs 3 can be accommodated and at the same time prevent the knitted body 30 from being separated from the outside of the coupler housing 10,
The ribs 3 of the reinforcing bar 1 are inserted into the entrance portion of the coupler housing 10 at a position corresponding to the gap maintaining protrusion 16, and two positioning grooves determine the insertion direction of the reinforcing bar 1 ( 17) A rebar locking device for a one-touch coupler for rebar joints formed to be spaced apart at 180-degree intervals. delete delete delete delete According to claim 1, when the node (2) of the reinforcing bar (1) is formed in a spiral shape, the locking groove (31) formed in the piece (30) is formed in a spiral shape corresponding to the node (2) of the reinforcing bar (1). Reinforcement locking device for one-touch coupler for rebar joints.

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