JP7747285B2 - One-touch screw rebar coupler with screw pitch correction - Google Patents

Description

The present invention relates to a rebar coupler, and more specifically to a one-touch screw rebar coupler that allows for thread pitch correction, which allows for rebar connection work using a screw joint method without rotating the multiple rebars being connected or with minimal rotational force.

In general, reinforced concrete structures have excellent compressive and tensile strength, allowing for the construction of a wide variety of structures, and their excellent physical properties mean they are widely used in a variety of architectural and civil engineering projects.

When constructing such buildings and other concrete structures for various civil engineering projects, reinforcement work is carried out, and rebars, which are standardized to a certain length during reinforcement work, are connected together depending on the structure.

Usually, lap joints, welded joints, screw joints, etc. are proposed as methods for connecting rebars during reinforcement work.

The threaded joint method involves threading the ends of rebar to connect them together, which can prevent slippage when tensile force is applied to the connection point, but requires separate processing equipment to form the threads on the ends, making on-site connection work difficult.

Korean Patent No. 1563637 (October 21, 2015) discloses a rebar connection device with an integrated pipe. The rebar connection device of this invention is fitted closely to the end of the rebar to be connected, and has an arc-shaped split pipe with a male thread formed on its outer periphery, which is connected to a connecting pipe with a female thread formed on its inner periphery.

Korean Patent Publication No. 2015-0096554 discloses a coupler for connecting spiral rebars, Korean Patent Publication No. 2019-00609979 discloses a screw-type rebar joint structure for deformed rebars, and Korean Patent No. 2344476 discloses a rebar coupler for preventing initial slippage.

This rebar joint has a structure in which a coupler is screwed onto the male threads of both rebars to connect the deformed rebars.

The conventional threaded joints described above have the disadvantage that when the rebars on both sides of the connection are fixed to the concrete structure, the threads formed on the rebars cannot be guaranteed to have the same pitch due to the distance between the ends of the opposing rebars.If the continuity of the threads formed on the ends of the two opposing rebars cannot be guaranteed, it is virtually impossible to thread them into a coupler.

To explain this in more detail, when a first rebar fixed to a first concrete structure for connection and a second rebar fixed to a second concrete structure are joined together, a phase difference occurs between the tip of the thread formed on the first rebar and the tip of the thread formed on the second rebar, preventing the spiral from continuing, which has the disadvantage of making it impossible to screw the two rebars together.

Furthermore, if the ends of the first and second rebars to be connected are spaced apart by a specified distance, and the distance does not match the thread pitch or a multiple thereof, there is a drawback in that the coupler threaded onto the first rebar cannot be rotated to thread onto the second rebar.

In addition, conventional threaded joint type rebar couplers use the coupler body as a medium for connection, with the rebar thread formed on the end of the rebar being threaded into the coupling thread formed on the inner surface of the hollow part of the coupler body. Therefore, in order to connect the rebars, at least one of the rebars must be rotated or the coupler body must be rotated.

Therefore, if the installation space is significantly restricted when connecting the rebars, the labor required for the connecting work increases, which is a disadvantage.

Korean Patent No. 1563637 Korean Patent Publication No. 2015-0096554 Korean Patent Publication No. 2019-00609979 Korean Patent No. 2344476

The present invention was made in consideration of the above problems, and its purpose is to provide a one-touch screw rebar coupler that allows the rebar on at least one side to be inserted without rotating and then maintained in a threaded state when screwing both rebars together to connect them to the coupler body, thereby reducing the amount of work required to connect the rebars, and allows for thread pitch adjustment so that the rebars can be screwed together even when the connecting rebars are fixed to the concrete structure.

Another object of the present invention is to provide a one-touch threaded rebar coupler with thread pitch adjustment that prevents the rebar from rotating when the connecting rebar is fixed to a structure, thereby fundamentally reducing problems caused by the threaded engagement between the rebar's threaded portion and the coupler body.

Another object of the present invention is to provide a one-touch threaded rebar coupler that can correct the thread pitch and overcome the problem of pitch mismatch between the threaded portion of the rebar and the coupler body due to misalignment of the rebars when connecting rebars fixed to concrete on one side and rebars fixed to a concrete structure on the other side. It can also connect multiple rebars that are not coaxial but are misaligned.

In order to solve the above problem, according to one aspect of the present invention, the threaded joint-type one-touch rebar coupler capable of thread pitch correction according to the present invention comprises a coupler body having a hollow body formed in the longitudinal direction and a first body thread portion formed on the inner peripheral surface of one side and a second body thread portion formed on the inner peripheral surface of the other side; a first rebar joint formed with a plurality of first phase difference correction pieces arranged in the circumferential direction, into which the first rebar thread portion of the first rebar is inserted and threaded; and a first screw phase difference correction unit having an outer thread portion of the first correction unit formed on the outer peripheral surface of the first phase difference correction piece at a pitch relatively larger than the thread pitch of the first rebar thread portion, so that when the first rebar joint and the first rebar thread portion are connected, the first phase difference correction piece expands due to the insertion of the first rebar thread portion and, after insertion, the first phase difference correction piece can be elastically biased upward and threaded closely onto the first rebar thread portion by an elastic holding means for elastically biasing the first phase difference correction piece.

In the present invention, the second body thread portion of the coupler body is coupled to the second rebar thread portion of the second rebar connected to the first rebar, and an elastic holding means is provided inside the coupler body to which the first and second rebar thread portions of the first and second rebars are coupled, for elastically biasing the first screw phase difference correction unit upward.

The elastic holding means includes a spring whose one side is held in the step formed by the difference in diameter between the first body thread portion of the coupler body to which the first screw phase difference correction unit is connected and the second rebar thread portion of the second rebar, and a central plate held on the other side of the spring and contacting the first phase difference correction piece of the first screw phase difference correction unit to elastically bias it upward.

The surface of the thread formed on the first body thread portion on the inner peripheral surface of the coupler body, facing the entrance of the coupler body, comprises a first helical inclined portion that slopes outward from the center of the coupler body. One side of each thread of the outer thread portion of the first correction unit, formed on the outer peripheral surface of the first phase difference correction piece, comprises a second helical inclined portion that corresponds to the first helical inclined portion, and the second helical inclined portion slides relative to the first helical inclined portion when the first phase difference correction piece moves radially.

The second rebar thread portion of the second rebar and the second body thread portion of the coupler body are threaded together via a second screw phase difference correction unit consisting of second phase difference correction pieces arranged in the circumferential direction.

As described above, the present invention can fundamentally solve the problem of screw misalignment that occurs during the construction process of a building structure when connecting reinforcing bars fixed to the building structure, due to the phase difference in pitch between the threaded portion formed on the reinforcing bar and the coupler body when they are threaded together, or due to the separation of the reinforcing bars being connected.

Furthermore, when connecting two fixed rebars, the present invention allows the threaded portion of the rebar to be screwed into the rebar joint portion of the thread phase difference correction unit screwed into the coupler body without rotating the rebars or the coupler body, thereby improving the workability of connecting rebars.

In addition, the rebar coupler of the present invention makes it possible to connect two rebars fixed to a building structure even when the two rebars are not positioned coaxially but are misaligned.

FIG. 1 is an exploded perspective view of a one-touch screw rebar coupler capable of correcting thread pitch according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the one-touch screw rebar coupler shown in FIG. 1 that can correct the screw pitch. FIG. 10 is an exploded perspective view of a one-touch screw rebar coupler capable of correcting thread pitch according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the one-touch screw rebar coupler shown in FIG. 3 that allows for thread pitch correction. FIG. 10 is an exploded perspective view of a one-touch screw rebar coupler capable of correcting thread pitch according to a third embodiment of the present invention. FIG. 6 is a cross-sectional view of the one-touch screw rebar coupler capable of correcting the screw pitch shown in FIG. 5. 1 is a cross-sectional view showing the operating state of a one-touch screw rebar coupler capable of correcting thread pitch according to the present invention. FIG. 1 is a cross-sectional view showing the operating state of a one-touch screw rebar coupler capable of correcting thread pitch according to the present invention. FIG. FIG. 1 is a side view showing the use of a one-touch screw rebar coupler capable of correcting screw pitch according to the present invention. A cross-sectional view showing the operating state of the one-touch screw rebar coupler capable of correcting the screw pitch shown in Figure 5.

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

The one-touch threaded rebar coupler according to the present invention, which allows for thread pitch adjustment, is used to connect first and second rebars, each fixed on at least one side, and an embodiment thereof is shown in Figures 1 to 4.

Referring to these drawings, the one-touch screw rebar coupler 10 with adjustable thread pitch according to the present invention can connect first and second rebars 100, 110 for reinforcing bar arrangement during the construction of a building by threading. The ends of the first and second rebars 100, 110 for connection are respectively formed with first and second rebar screw portions 101, 111 having threads of a predetermined pitch.

The coupler body 40 has a hollow interior formed in the longitudinal direction, on one side of which a first body thread portion 20 is formed for threading with the first rebar thread portion 101 of the first rebar 100, and on the other side of which a second body thread portion 30 is formed for threading with the second rebar thread portion 111 of the second rebar 110.

The coupler body 40 is provided with a first screw phase difference correction unit 50, which has a plurality of first phase difference correction pieces 52 whose outer surface is held by an elastic contraction ring 51 and which are arranged circumferentially to form a first rebar joint 54.

A first inner correction thread portion 53 is formed on the inner peripheral surface of this first phase difference correction piece 52, which engages with the first rebar thread portion 101 of the first rebar 100. The outer peripheral surface is formed with a first outer correction thread portion 55, which engages with the first main body thread portion 20 so that the first phase difference correction piece 52 moves radially and the first rebar thread portion 101 is inserted without being threaded into the first rebar joint 54, maintaining the threaded state between the first rebar thread portion 101 and the first rebar joint 54.

In addition, an elastic holding means 70 is provided inside the coupler body 40 to elastically bias the first screw phase difference correction unit 50 upward.

The following is a detailed description of the components of the one-touch threaded rebar coupler capable of thread pitch correction according to the present invention, which is configured as described above.

The thread pitches formed on the first and second rebar threaded portions 101, 111 provided at the ends of the first rebar 100 and second rebar 110, respectively, are identical to each other.

The coupler body 40 is hollow in the longitudinal direction, with one side of the hollow having a larger diameter than the other, forming a step toward the center. A first body thread portion 20 is formed on the inner surface of the hollow on the larger diameter side of the coupler body 40, and a second body thread portion 30 is formed on the inner surface of the hollow on the smaller diameter side. The thread pitch formed on the inner surface of the second body thread portion 30 is the same as the thread pitch of the second rebar thread portion 111 of the second rebar 110.

Meanwhile, the threads formed on the first main body thread portion 20 of the coupler body 40 and the first outer correction thread portion 55 formed on the outer surface of the first phase difference correction piece 52 of the first thread phase difference correction unit 50 are formed with a pitch relatively larger than the thread pitch formed on the first rebar thread portion 101, and the radial outward and inward movement displacement while held by the elastic contraction ring 51 is formed to be greater than the height of the thread or the depth of the valley of the first rebar thread portion 101.

In this case, the first rebar thread portion 101 of the first rebar 100 should be inserted without being threaded into the first rebar joint 54 of the first screw phase difference correction unit 50, and the first inner correction thread portion 53 of the first rebar joint 54 should be threadedly connected to the first rebar thread portion 101, while maintaining the threaded state of the first main body thread portion 20 and the first outer correction thread portion 55.

The threads formed on the first main body thread portion 20 and one side of the threads of the first outer correction thread portion 55 formed on the outer surface of the first phase difference correction piece 52 are respectively formed with first and second spiral inclined portions 21, 56, as shown in Figures 2 and 4, so that the tensile force acting on the connected first rebar 100 acts as a fastening force (gripping force) that connects the first phase difference correction piece 52 to the first rebar thread portion 101 of the first rebar 100.

The elastic holding means 70 for elastically biasing the first screw phase difference correction unit 50 upward, which is provided inside the coupler body 40, includes a coil spring 71, one side of which is held in a step formed at the boundary between the first body threaded portion 20 and the second body threaded portion 30 of the coupler body 40. A center plate 72 is provided on the other side of the spring 71 held in the step, which comes into contact with the lower end of the first phase difference correction piece 52 of the first screw phase difference correction unit 50, applying upward pressure to them.

Meanwhile, Figures 3 and 4 show a second embodiment of a screw-tightening type rebar coupler capable of thread pitch correction according to the present invention. In this embodiment, the same reference numerals as in the previous embodiment refer to the same components.

Referring to these drawings, the first rebar thread portion 101 of the first rebar 100 is threadedly engaged with the first rebar joint portion 54 of the first screw phase difference correction unit 50, and the first outer correction thread portion 55 formed on the outer surface of the first phase difference correction piece 52 of the first screw phase difference correction unit 50 is threadedly engaged with the first main body thread portion 20 formed on one side of the coupler main body 40 as described above, but is formed with a larger thread pitch than the thread formed on the first rebar thread portion 101.

The second rebar thread portion 111 of the second rebar 110 for connection to the first rebar 100 is threadedly engaged with the second rebar joint portion 84 of the second screw phase difference correction unit 80, in which the first phase difference correction piece 82 is circumferentially held by the elastic contraction ring 81, and the outer surface of the second screw phase difference correction unit 80 is threadedly engaged with the second body thread portion 30 formed on one side of the coupler body 40.

As mentioned above, the pitch of the first outer correction screw portion 55 formed on the outer surface of the first screw phase difference correction unit 50 and the thread pitch of the first main body screw portion 20 are formed relatively larger than the thread pitch of the first rebar screw portion 101.

In addition, the pitch of the second outer correction screw portion 85 formed on the outer surface of the second screw phase difference correction unit 80 and the thread pitch of the second main body screw portion 30 of the coupler main body 40 to which the second screw phase difference correction unit 80 is connected are formed relatively larger than the pitch of the second rebar screw portion 111.

Here, like the first phase difference correction piece 52 described above, the second phase difference correction piece 82 of the second screw phase difference correction unit 80 moves back and forth radially when inserting the second rebar thread portion 111 of the second rebar 110 into the second rebar joint portion 84. At this time, the radial movement displacement of the second phase difference correction piece 82 is formed to be greater than the height of the thread or the depth of the valley of the second rebar thread portion 111.

An elastic holding means 70 is provided inside the coupler body 40 to elastically bias the first phase difference compensation piece 52 and the second phase difference compensation piece 82 outward. The elastic holding means 70 includes a central plate 75 placed in the hollow center of the coupler body 40 and springs 76 and 57 respectively provided on both sides of the central plate 75.

Figures 5 and 6 show a third embodiment of the one-touch screw rebar coupler capable of thread pitch correction according to the present invention.

Referring to these drawings, a first body thread portion 20 to which the first screw phase difference correction unit 50 is connected is formed on one side of the coupler body 40, and a third body thread portion 35 whose central axis C is offset from that of the first body thread portion 20 is formed on the other side of the coupler body 40.

The third body thread portion 35 of the coupler body 40 is threadedly connected to the eccentricity correction coupler body 45, which has a first eccentricity correction thread portion 46 formed thereon, by a connecting member 48. The first eccentricity correction thread portion 46 formed on the eccentricity correction coupler body 45 is formed to be offset from the central axis C in the same manner as the third body thread portion 35.

On the other side corresponding to the first eccentricity correction screw portion 46 formed on the eccentricity correction coupler body 45, a second eccentricity correction screw portion 47 is formed on the same central axis C as the first body screw portion 20 and is connected to the second rebar screw portion 111 of the second rebar 110.

As in the previous embodiment, the first screw phase difference correction unit 50 is held by an elastic contraction ring 51 and consists of a plurality of first phase difference correction pieces 52, each having a first inner correction screw portion 53 formed on the inside that engages with the first rebar screw portion 101 of the first rebar 100 and a first outer correction screw portion 55 formed on the outside. Furthermore, the first screw phase difference correction unit 50 is elastically supported outward by an elastic holding means 70, as in the previous embodiment.

The operation of the one-touch threaded rebar coupler capable of thread pitch correction according to the present invention, configured as described above, will be explained below with reference to Figures 7 and 8.

First, when constructing a building using the one-touch threaded rebar coupler 10 capable of thread pitch adjustment according to the present invention, in order to connect the first rebar 100 to the second rebar 110, one side of which is fixed to the concrete structure, the second body thread portion 30 of the coupler body 40 is screwed into the second rebar thread portion 111 of the second rebar 110.

Then, rotate the first thread phase difference correction means 50 connected to the first rebar thread portion 20 of the coupler body 40 by 0.5 to 1 turn and pull it out from the coupler body 40.

In this state, the first rebar thread portion 101 of the first rebar 100 for connection is inserted into the first rebar joint portion 54 of the first screw phase difference correction means 50. In this way, as shown in FIG. 7, the first phase difference correction piece 52 of the first screw phase difference correction means 50, held by the elastic holding means 70 or elastic contraction ring 51, moves radially, and the first rebar thread portion 101 is inserted without threading into the first inner correction thread portion 53 formed on the inner surface of the first phase difference correction piece 52. The end of the first rebar thread portion 101 inserted in this way comes into contact with the upper surface of the center plate 72.

During this process, the second spiral inclined portion 56 of the first outer correction screw portion 55 formed on the outer peripheral surface of the first phase difference correction piece 52 slides back against the first spiral inclined portion 21 of the first main body screw portion 20.

In this state, the first screw phase difference correction means 50 is rotated forward and backward to thread the thread formed on the first rebar thread portion 101 of the first rebar 100 into the first inner correction thread portion 53 formed on the inner surface of the first screw phase difference correction means 50, as shown in Figure 8, and then the first screw phase difference correction means 50 is tightened to complete the connection of the first rebar 100.

As shown in FIG. 9, to connect the first and second reinforcing bars 100, 110 fixed to the first and second concrete structures 210, 220, respectively, the second body thread portion 30 of the coupler body 40 is screwed into the second reinforcing bar thread portion 111 of the second reinforcing bar 110 fixed to the second concrete structure 220.

Then, rotate each first screw phase difference correction unit 50 so that the outer correction screw portion 55 of the first correction unit is pulled out 0.5 to 1 pitch.

In this state, the first rebar thread portion 101 of the first rebar 100 installed in the first concrete structure 210 is positioned to correspond to the first screw phase difference correction means 50 of the coupler body 40.

Then, the first concrete structure 210 is lowered, and the first rebar thread portion 101 of the first rebar 100 is inserted into the first rebar joint portion 54 of the first screw phase difference correction means 50 connected to each coupler body 40.

In this way, as described above, the first phase difference correction piece 52 of the first screw phase difference correction means 50, held by the elastic contraction ring 51 and the elastic holding means 70, moves radially, and the first rebar thread portion 101 is inserted without threading into the first inner correction thread portion 53 formed on the inner surface of the first phase difference correction piece 52. However, there may be a difference in the insertion depth of the first rebar thread portion 101 of the first rebar 100 relative to the second rebar 110.

The difference in the insertion position of the first rebar thread portion 101 may result in the threading of the first rebar thread portion 101 and the first inner correction thread portion 53 formed on the first phase difference correction piece 52 of the first screw phase difference correction means 50 not being connected due to an imbalance in phase difference or pitch continuity (pitch deviation).

In this state, the first screw phase difference correction means 50 is rotated forward and backward to screw the thread formed on the first rebar thread portion 101 of the first rebar 100 into the first inner correction thread portion 53 formed on the inner surface of the first phase difference correction piece 52.

Then, each first screw phase difference correction means 50 is tightened to complete the connection of the first rebar 100.

On the other hand, as shown in FIG. 10, if the first and second rebars 100, 110 for connection are not positioned on the same central axis C, the second rebar screw portion 111 of the second rebar 110 is coupled to connect to the second eccentricity correction screw portion 47 of the eccentricity correction coupler body 45.

In this state, the eccentricity correction coupler body 45 and the coupler body 40 connected by the connecting member 48 are rotated to align the center of the first rebar joint 54 of the first screw phase difference correction unit 50. Furthermore, as in the previously described embodiment, the first rebar thread portion 101 of the first rebar 100 is coupled to the first rebar joint 54.

As described above, the one-touch screw rebar coupler with thread pitch adjustment capability of the present invention allows for screw tightening without rotating the first and second rebars being connected, fundamentally resolving problems caused by thread pitch when fastening the two rebars together and ultimately improving workability when connecting rebars.

In particular, even when the first and second rebars are fixed to a concrete structure, it can fundamentally resolve issues such as poor connection due to thread alignment or phase differences in the screws, and it can also enable connection even when the first and second rebars for connection are not placed on the same central axis but are misaligned.

The above-described embodiments are intended to explain the present invention and are not intended to limit the scope of the present invention. In other words, the scope of the present invention is defined by the claims, not by the embodiments. Various modifications made within the scope of the claims and within the meaning of equivalent inventions are considered to be within the scope of the present invention.

The one-touch screw rebar coupler with thread pitch adjustment capability of the present invention can be widely used not only to connect rebar during reinforcement placement, but also to connect pipes, bolts, structural steel, rods, and other items used in various industrial facilities.

10: One-touch screw rebar coupler 20: First main body thread portion 21: First spiral inclined portion 30: Second main body thread portion 35: Third main body thread portion 40: Coupler body 45: Eccentricity correction coupler body 46: First eccentricity correction screw portion 47: Second eccentricity correction screw portion 48: Connecting member 50: First screw phase difference correction unit 51: Elastic contraction ring 52: First phase difference correction piece 53: First inner correction screw portion 54: First rebar joint portion 55: First outer correction screw portion 56: Second spiral inclined portion 57: Spring 70: Elastic holding means 71: Coil spring 72: Center plate 75: Center plate 76: Spring 80: Second screw phase difference correction unit 81: Elastic contraction ring 82: Second phase difference correction piece 84: Second rebar joint portion 85: Second outer correction screw portion 100: First reinforcing bar 101: First reinforcing bar screw portion 110: Second reinforcing bar 111: Second reinforcing bar screw portion 210: First concrete structure 220: Second concrete structure C: Central axis

Claims (6)

a coupler body having a hollow interior formed in a longitudinal direction, the hollow interior having a first body thread portion formed on an inner peripheral surface of one side thereof and a second body thread portion formed on an inner peripheral surface of the other side thereof;
a first thread pitch misalignment unit including a first rebar joint into which a first rebar thread portion of a first rebar is inserted and screwed by a plurality of first pitch misalignment correction pieces arranged in a circumferential direction , and a first outer correction thread portion formed on an outer circumferential surface of the first pitch misalignment correction pieces at a pitch relatively larger than the thread pitch of the first rebar thread portion and coupled with the first main body thread portion ;
When the first reinforcing bar joint and the first reinforcing bar threaded portion are coupled, the first pitch deviation correction piece is expanded by the insertion of the first reinforcing bar threaded portion, and is tightly fitted to the first reinforcing bar threaded portion by an elastic holding means provided in the coupler body, and is screwed into the first reinforcing bar threaded portion;
The elastic holding means comprises a spring having one side held in a step portion formed by the difference in diameter between the first body thread portion of the coupler body to which the first thread pitch misalignment correction unit is connected and the second rebar thread portion of the second rebar, and a central plate held on the other side of the spring and contacting the first pitch misalignment correction pieces of the first thread pitch misalignment correction unit to elastically bias them upward . A one- touch screw rebar coupler capable of correcting thread pitch as described in claim 1, characterized in that it further comprises an elastic contraction ring that is provided on the outer surface of the first pitch misalignment correction piece of the first thread pitch misalignment correction unit and elastically supports the first pitch misalignment correction piece toward the center of the first pitch misalignment correction piece. one side of the thread formed on the first body thread portion of the coupler body includes a first helical inclined portion formed inclined outward from a center portion of the coupler body,
One side of each thread of the first outer correcting screw portion formed on the outer circumferential surface of the deviation correcting piece of the first pitch has a second helical inclined portion corresponding to the first helical inclined portion,
A one-touch screw rebar coupler capable of correcting thread pitch as described in claim 1, characterized in that when the first pitch misalignment correction piece moves radially, the second spiral inclined portion slides relative to the first spiral inclined portion. A one-touch screw rebar coupler capable of screw pitch correction as described in claim 1, characterized in that it further comprises a second screw pitch misalignment correction unit having a second pitch misalignment correction piece held by an elastic contraction ring between the second rebar screw portion of the second rebar and the second main body screw portion of the coupler main body. a first thread pitch misalignment unit including a plurality of first pitch misalignment pieces arranged in a circumferential direction, each of which forms a first rebar joint into which a first rebar thread portion of a first rebar is inserted and threaded, and a first outer correction thread portion formed on an outer circumferential surface of the first pitch misalignment pieces, the first outer correction thread portion being coupled to a first main body thread portion at a pitch relatively larger than the thread pitch of the first rebar thread portion ;
a coupler body having a hollow portion formed in a longitudinal direction, the first body thread portion being formed on an inner peripheral surface of one side thereof to be threadedly engaged with the first outer correction thread portion of the first thread pitch deviation correction unit, and a third body thread portion being formed on the other side thereof, the central axis of which is offset from that of the first body thread portion;
an eccentricity correction coupler body, which is connected to the third body thread portion of the coupler body by a connecting member, and which has a first eccentricity correction thread portion formed on one side thereof, which is offset from the central axis like the third body thread portion, and a second eccentricity correction thread portion formed on the other side thereof on the same central axis as the first body thread portion and which is coupled to the second rebar thread portion of the second rebar ;
A one-touch screw rebar coupler capable of thread pitch correction, characterized in that when the first rebar joint and the first rebar thread portion are connected, the first pitch misalignment correction piece expands upon insertion of the first rebar thread portion, and is tightly fitted and screwed into the first rebar thread portion by an elastic retaining means provided on the coupler body . A one-touch screw rebar coupler capable of correcting thread pitch as described in claim 5, characterized in that it further comprises an elastic contraction ring that is provided on the outer surface of the first pitch misalignment correction piece of the first thread pitch misalignment correction unit and elastically supports the first pitch misalignment correction piece toward the center of the first pitch misalignment correction piece.