One-touch screw rebar coupler with screw pitch correction

Abstract

To provide a one-touch screw reinforcing bar coupler capable of correcting screw pitch.SOLUTION: A coupler body in which a first main body screw part is formed on a hollow one-side inner peripheral surface formed in the longitudinal direction and a second main body screw part is formed on the other side inner peripheral surface, and a first reinforcing bar joint part in which the first reinforcing bar screw part of the first reinforcing bar is inserted and screwed by a plurality of first phase difference correction pieces arranged in the circumferential direction are formed. After the first phase difference correction piece is expanded and inserted by insertion of the first reinforcing bar screw part when the first reinforcing bar joint part and the first reinforcing bar screw part are coupled, the first phase difference correction piece is formed on an outer circumferential surface of the first phase difference correction piece at a pitch relatively larger than a screw pitch of the first reinforcing bar screw part so as to be closely screw-coupled to the first reinforcing bar screw part by elastic holding means for elastically biasing the first phase difference correction piece upward, and a first screw phase difference correction unit is provided in which an outer screw part of a first correction unit coupled with a first main body screw part is formed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar coupler, and more particularly to a one-touch screw reinforcing bar coupler capable of correcting the thread pitch, which allows the reinforcing bar to be connected without rotating multiple reinforcing bars or with minimal rotational force when connecting reinforcing bars using a screw joint method. [Background technology]

[0002] In general, reinforced concrete structures have excellent compressive and tensile strengths, allowing the construction of various types of structures, and are also widely used in various architectural and civil engineering works due to their excellent physical properties.

[0003] When constructing such buildings and various civil engineering works, concrete structures are manufactured through the use of reinforcement bars, which are standardized to a certain length and are connected to each other depending on the structure.

[0004] Typically, methods of connecting reinforcing bars during reinforcement work include lap joints, welded joints, and screw joints.

[0005] The screw joint method involves threading the ends of reinforcing bars 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.

[0006] Korean Patent No. 1563637 (October 21, 2015) discloses a tube-integrated reinforcing bar connecting device. The reinforcing bar connecting device of this invention is fitted closely to the end of the reinforcing bar to be connected, and has a structure in which arc-shaped split pipes with male threads formed on the outer periphery are provided, and the split pipes are connected by a connecting pipe with female threads formed on the inner periphery.

[0007] 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.

[0008] This reinforcing bar joint has a structure in which a coupler is screwed onto the male threads of both reinforcing bars to connect the deformed reinforcing bars.

[0009] The conventional threaded joints described above have a drawback in that when the reinforcing bars on both sides for connection are fixed to a concrete structure, the continuity of the threads formed on the reinforcing bars to the same pitch is not guaranteed due to the distance between the ends of the opposing reinforcing bars. If the continuity of the threads formed on the ends of the two opposing reinforcing bars is not guaranteed, it is practically impossible to screw them into a coupler.

[0010] 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 screw formed on the first rebar and the tip of the screw formed on the second rebar, preventing the spiral from continuing, resulting in the disadvantage that it becomes impossible to screw the two rebars together.

[0011] Furthermore, if the ends of the first and second rebars to be connected are spaced apart by a predetermined distance, and the distance does not match the pitch of the threads 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.

[0012] In addition, conventional threaded joint type rebar couplers connect rebars using the coupler body as a medium by threading a rebar thread formed on the end of the rebar for connection with a 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.

[0013] Therefore, when the installation space is significantly restricted during the reinforcing bar connecting work, there is a disadvantage in that the number of steps required for the connecting work increases. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Korean Patent No. 1563637 [Patent Document 2] Korean Patent Publication No. 2015-0096554 [Patent Document 3] Korean Patent Publication No. 2019-00609979 [Patent Document 4] Korean Patent No. 2344476 Summary of the Invention [Problem to be solved by the invention]

[0015] Therefore, the present invention has been made in consideration of the above problems, and the object of the present invention is to provide a one-touch screw reinforcing bar coupler that allows the reinforcing bars to be screwed together even when the reinforcing bars for connection are fixed to a concrete structure, by inserting at least one of the reinforcing bars without rotating them and then maintaining the screwed state when screwing together the two reinforcing bars to connect them to the coupler body, thereby reducing the labor required for connecting the reinforcing bars and allowing for screw pitch correction.

[0016] Another object of the present invention is to provide a one-touch screw rebar coupler capable of correcting the thread pitch, which does not rotate the rebar when the connecting rebar is fixed to a structure, and which fundamentally reduces problems caused by the threaded engagement between the threaded portion of the rebar and the coupler body.

[0017] Another object of the present invention is to provide a one-touch screw rebar coupler that can correct the thread pitch and can overcome the problem of pitch mismatch between the threaded portion of the rebar and the coupler body due to a misalignment in the spacing of the rebars when connecting rebars fixed to concrete on one side and rebars fixed to a concrete structure on the other side, and can connect multiple rebars to be connected even when they are not placed coaxially but are misaligned. [Means for solving the problem]

[0018] In order to solve the above problems, according to one aspect of the present invention, a one-touch rebar coupler of a threaded joint type capable of thread pitch correction according to the present invention is characterized by comprising: 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 compensation pieces arranged in the circumferential direction, into which the first rebar thread portion of the first rebar is inserted and screwed; and a first screw phase difference compensation unit having an outer thread portion of the first compensation unit formed on the outer peripheral surface of the first phase difference compensation 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 compensation piece is expanded by the insertion of the first rebar thread portion and after insertion, the first phase difference compensation piece can be closely fitted to the first rebar thread portion by an elastic holding means for elastically biasing the first phase difference compensation piece upward and screwed into it.

[0019] 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.

[0020] The elastic holding means includes 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 screw phase difference correction unit is coupled and the second rebar thread portion of the second rebar, and a center 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 them upward.

[0021] The surface of the thread of the first body thread portion formed on the inner peripheral surface of the coupler body toward the inlet of the coupler body comprises a first helical inclined portion inclined outward from the center of the coupler body, and one side of each thread of the outer thread portion of the first compensation unit formed on the outer peripheral surface of the first phase difference compensation piece comprises a second helical inclined portion corresponding 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 compensation piece moves radially.

[0022] The second rebar threaded portion of the second rebar and the second body threaded portion of the coupler body are screwed together via a second screw phase difference correction unit consisting of second phase difference correction pieces arranged in the circumferential direction. [Effects of the Invention]

[0023] As described above, according to the present invention, when connecting reinforcing bars fixed to a building structure during the construction process of a building structure, it is possible to fundamentally solve the problem of misalignment of screws that occurs due to the phase difference in pitch when the threaded portion formed on the reinforcing bar and the coupler body are screwed together, or the separation state of the reinforcing bars to be connected.

[0024] Furthermore, when connecting two fixed reinforcing bars, the present invention allows the threaded portion of the reinforcing bar to be screwed into the reinforcing bar joint portion of the screw phase difference correction unit screwed into the coupler body without rotating the reinforcing bars or the coupler body, thereby improving the workability of connecting reinforcing bars.

[0025] In addition, the reinforcing bar coupler according to the present invention enables the reinforcing bar connection work to be performed when the reinforcing bars are not positioned coaxially but are misaligned when connecting two reinforcing bars fixed to a building structure. [Brief explanation of the drawings]

[0026] [Figure 1] 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. [Figure 2] FIG. 2 is a cross-sectional view of the one-touch screw rebar coupler shown in FIG. 1 that allows for thread pitch correction. [Figure 3] 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. [Figure 4] FIG. 4 is a cross-sectional view of the one-touch screw rebar coupler capable of correcting the screw pitch shown in FIG. 3. [Figure 5] 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. [Figure 6] FIG. 6 is a cross-sectional view of the one-touch screw rebar coupler capable of correcting the screw pitch shown in FIG. 5. [Figure 7] 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. [Figure 8] 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. [Figure 9] 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. [Figure 10] FIG. 6 is a cross-sectional view showing the operating state of the one-touch screw rebar coupler capable of correcting the screw pitch shown in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] The one-touch screw rebar coupler capable of correcting the thread pitch according to the present invention is for connecting first and second rebars each having at least one side fixed, and an embodiment thereof is shown in Figures 1 to 4.

[0029] Referring to these drawings, the one-touch screw rebar coupler 10 capable of correcting thread pitch according to the present invention can connect first and second rebars 100, 110 for reinforcing bars when constructing a building by screwing them together, and first and second rebar screw portions 101, 111 with threads of a predetermined pitch are respectively formed on the end sides of the first and second rebars 100, 110 for connection.

[0030] In addition, the coupler body 40 has a hollow inner surface formed in the longitudinal direction, on one side of which a first body thread portion 20 for threading with the first rebar thread portion 101 of the first rebar 100 is formed, and on the other side of which a hollow inner surface is formed with a second body thread portion 30 for threading with the second rebar thread portion 111 of the second rebar 110.

[0031] 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.

[0032] A first inner correction screw portion 53 is formed on the inner peripheral surface of this first phase difference correction piece 52, which is coupled with the first rebar screw portion 101 of the first rebar 100. Then, a first outer correction screw portion 55 is formed on the outer peripheral surface, which is coupled with the first main body screw portion 20 so that the first phase difference correction piece 52 moves radially and the first rebar screw portion 101 is inserted without being threaded into the first rebar joint 54, and then the threaded state of the first rebar screw portion 101 and the first rebar joint 54 can be maintained.

[0033] Further, an elastic holding means 70 is provided inside the coupler body 40 to elastically bias the first screw phase difference correction unit 50 upward.

[0034] The one-touch threaded rebar coupler capable of correcting thread pitch according to the present invention configured as described above will be described in detail below by component.

[0035] The first and second rebar threaded portions 101 and 111 provided at the ends of the first and second rebars 100 and 110, respectively, have the same thread pitch.

[0036] The coupler body 40 is hollow in the longitudinal direction, and one side of the hollow has a larger diameter than the other, forming a step toward the center. A first body thread portion 20 is formed on the inner circumferential 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 circumferential surface of the hollow on the smaller diameter side. The thread pitch formed on the inner circumferential 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.

[0037] 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 peripheral surface of the first phase difference correction piece 52 of the first thread phase difference correction unit 50 are formed to have 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 larger than the height of the thread or the depth of the valley of the first rebar thread portion 101.

[0038] In this case, the first rebar screw portion 101 of the first rebar 100 is inserted without being screwed into the first rebar joint 54 of the first screw phase difference correction unit 50, and the first inner correction screw portion 53 of the first rebar joint 54 and the first rebar screw portion 101 are connected together, while maintaining the screwed state of the first main body screw portion 20 and the first outer correction screw portion 55.

[0039] The thread formed on the first main body thread portion 20 and one side of the thread 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.

[0040] The elastic holding means 70 for elastically biasing the first screw phase difference compensation unit 50 provided inside the coupler body 40 upward 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, and this center plate 72 comes into contact with the lower end of the first phase difference compensation piece 52 of the first screw phase difference compensation unit 50 to press them upward.

[0041] 3 and 4 show a second embodiment of a screw-tightening type rebar coupler capable of correcting thread pitch according to the present invention. In this embodiment, the same reference numerals as those in the previous embodiment refer to the same components.

[0042] 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.

[0043] The second rebar screw portion 111 of the second rebar 110 for connection to the first rebar 100 is screwed into 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 held circumferentially by the elastic contraction ring 81, and the outer surface of the second screw phase difference correction unit 80 is screwed into the second body screw portion 30 formed on one side of the coupler body 40.

[0044] As described 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 screw pitch of the first main body screw portion 20 are formed relatively larger than the screw pitch of the first rebar screw portion 101.

[0045] In addition, the pitch of the second outer correction screw portion 85 formed on the outer peripheral 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 coupled are formed relatively larger than the pitch of the second rebar screw portion 111.

[0046] Here, like the first phase difference compensation piece 52 described above, the second phase difference compensation piece 82 of the second screw phase difference compensation unit 80 moves back and forth in the radial direction when inserting the second rebar threaded portion 111 of the second rebar 110 into the second rebar joint portion 84. At this time, the radial displacement of the second phase difference compensation piece 82 is formed to be greater than the height of the thread or the depth of the valley of the second rebar threaded portion 111.

[0047] 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 center plate 75 placed in the hollow center of the coupler body 40 and springs 76 and 57 respectively provided on both sides of the center plate 75.

[0048] 5 and 6 show a third embodiment of a one-touch screw reinforcing bar coupler capable of correcting thread pitch according to the present invention.

[0049] Referring to these drawings, a first body thread portion 20 to which a 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.

[0050] The third body thread portion 35 of the coupler body 40 is threadably coupled to the eccentricity correction coupler body 45, on which the first eccentricity correction thread portion 46 is formed, 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.

[0051] 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 coupled to the second rebar screw portion 111 of the second rebar 110.

[0052] The first screw phase difference correction unit 50, as in the previous embodiment, is held by an elastic contraction ring 51 and comprises a plurality of first phase difference correction pieces 52, each having a first inner correction screw portion 53 formed on the inside to be coupled with the first rebar screw portion 101 of the first rebar 100 and a first outer correction screw portion 55 formed on the outside. Also, the first screw phase difference correction unit 50 is elastically supported outward by an elastic holding means 70, as in the previous embodiment.

[0053] The operation of the one-touch threaded rebar coupler capable of correcting thread pitch according to the present invention configured as described above will be described below with reference to FIGS. 7 and 8.

[0054] First, when constructing a building using the one-touch screw rebar coupler 10 capable of correcting the thread pitch according to the present invention, in order to connect the first rebar 100 to the second rebar 110 whose one side is fixed to the concrete structure, the second body screw portion 30 of the coupler body 40 is screwed into the second rebar screw portion 111 of the second rebar 110.

[0055] Then, the first screw phase difference correcting means 50 coupled to the first reinforcing bar screw portion 20 of the coupler body 40 is rotated 0.5 to 1 turn and pulled out from the coupler body 40 .

[0056] 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 manner, 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 the elastic contraction ring 51 moves in the radial direction, and the first rebar thread portion 101 is inserted without being threaded 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 manner comes into contact with the upper surface of the center plate 72.

[0057] During this process, the second spiral inclined portion 56 of the first outer correction screw portion 55 formed on the outer 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.

[0058] 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 screw portion 101 of the first rebar 100 into the first inner correction screw 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.

[0059] As shown in FIG. 9, in order to connect the first and second reinforcing bars 100 and 110 fixed to the first and second concrete structures 210 and 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.

[0060] Then, each first screw phase difference correction unit 50 is rotated so that the outer correction screw portion 55 of the first correction unit is pulled out by 0.5 to 1 pitch.

[0061] In this state, the first rebar thread portion 101 of the first rebar 100 provided in the first concrete structure 210 is positioned to correspond to the first screw phase difference correcting means 50 of the coupler body 40 .

[0062] Then, the first concrete structure 210 is lowered and the first rebar screw 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.

[0063] 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 screw portion 101 is inserted without threading into the first inner correction screw portion 53 formed on the inner surface of the first phase difference correction piece 52, but there may be a difference in insertion depth of the first rebar screw portion 101 of the first rebar 100 relative to the second rebar 110.

[0064] The difference in the insertion position of the first rebar screw portion 101 may result in the screw engagement between the screw formed in the first rebar screw portion 101 and the first inner correction screw portion 53 formed in 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).

[0065] In this state, the first screw phase difference correction means 50 is rotated forward and backward to screw the screw formed on the first rebar screw portion 101 of the first rebar 100 into the first inner correction screw portion 53 formed on the inner surface of the first phase difference correction piece 52.

[0066] Then, each of the first screw phase difference correction means 50 is tightened to complete the connection of the first reinforcing bars 100.

[0067] On the other hand, as shown in FIG. 10, when the first and second reinforcing bars 100, 110 for connection are not positioned on the same central axis C line, the second reinforcing bar screw portion 111 of the second reinforcing bar 110 is coupled to the second eccentricity correction screw portion 47 of the eccentricity correction coupler body 45.

[0068] 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 centers of the first rebar joint portion 54 of the first screw phase difference correction unit 50. Also, the first rebar screw portion 101 of the first rebar 100 is coupled to the first rebar joint portion 54 as in the above-described embodiment.

[0069] As described above, the one-touch screw rebar coupler capable of correcting screw pitch according to the present invention allows screws to be tightened without rotating the first and second rebars being connected, fundamentally resolving problems caused by the screw pitch when fixing both rebars, and ultimately improving the workability of connecting rebars.

[0070] In particular, even when the first and second rebars are fixed to the concrete structure, it can fundamentally solve problems such as poor connection due to thread connections and screw phase differences, and it can also connect the first and second rebars when they are not placed on the same central axis but are misaligned.

[0071] The above-described embodiments are intended to explain the present invention and are not intended to limit the scope of the present invention. That is, 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 scope of the meaning of the invention equivalent thereto are considered to be within the scope of the present invention. [Industrial Applicability]

[0072] The one-touch screw rebar coupler capable of correcting the thread pitch of the present invention can be widely applied not only to connecting rebar during reinforcement arrangement, but also to connecting pipes, bolts, structural steel, rods, etc. used in various industrial facilities. [Explanation of symbols]

[0073] 10: One-touch screw rebar coupler 20: First body screw part 21:First spiral slope 30: Second body screw part 35: Third body screw part 40: Coupler body 45: Eccentricity correction coupler body 46: First eccentricity correction screw 47: Second eccentricity correction screw 48: Connecting member 50: First screw phase difference correction unit 51: Elastic contraction ring 52: 1st phase difference correction piece 53: First inner correction screw 54: First rebar joint 55: First outer correction screw 56:Second spiral slope 57: Spring 70: Elastic holding means 71: Coil spring 72: Central board 75: Central board 76: Spring 80: Second screw phase difference correction unit 81: Elastic contraction ring 82:Second phase difference correction piece 84: Second rebar joint 85: Second outer correction screw 100: First rebar 101: First rebar screw part 110: Second rebar 111: Second rebar screw section 210: First concrete structure 220: Second concrete structure C: Central axis

Claims

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

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