Patent Publication Number: US-2022235550-A1

Title: Rebar movement-prevention-type one-touch coupler

Description:
CROSS-REFERENCE TO PRIOR APPLICATIONS 
     This application is a National Stage Patent Application of PCT International Patent Application No. PCT/KR2019/006917 (filed on Jun. 10, 2019) under 35 U.S.C. § 371, which claims priority to Korean Patent Application No. 10-2019-0063060 (filed on May 29, 2019), which are all hereby incorporated by reference in their entirety. 
    
    
     BACKGROUND 
     The present disclosure relates to a rebar movement-prevention-type one-touch coupler. More particularly, the present disclosure relates to a rebar movement-prevention-type one-touch coupler that is configured to allow rebars to be fixed without a movement of the rebars after performing a one-touch insertion, due to a structure configured such that a fixation of the rebars is completed by performing an additional tightening operation to housing units into which the rebars are inserted, so that the coupler increases both the fixation stability of the rebar and the safety of a structure employing the rebar. 
     Generally, a rebar is widely used to reinforce strength of a concrete structure with being embedded in concrete when a reinforced concrete structure is applied in the fields of construction or civil engineering. Particularly, a large number of the rebars are used for a large structure, a special structure, and a civil engineering structure such as a bridge. 
     However, since the rebar is standardized and manufactured in a uniform length, the rebar manufactured in a limited length is required to be connected to another rebar when the rebar is used for a large structure, a special structure, and a civil engineering structure such as a bridge. 
     Conventionally, a lap joint, a welding joint, a thread process joint, a mechanical joint, a one-touch joint, and so on have been used until now as a method of connecting a rebar. 
     As the lap joint is a method in which the rebars are overlapped each other to a predetermined length and joined by bundling them with steel wires or wires, the lap joint has a disadvantage in that since the rebars need to be overlapped and joined each other every time when the lap joint is performed, loss amount of the rebar is high, a strength of the overlapping portion is weak and easily separated, and a construction period is extended due to poor constructability. Further, the welding joint is inconvenient to be performed in construction, and the strength of the rebar around the welded portion is remarkably weakened since heat is applied to the welded portion. 
     The mechanical joint method has been developed to compensate for the disadvantages that are described above. However, as an example of the conventional mechanical joint method, referring to a connecting apparatus for a steel reinforcement disclosed in Korean Patent Application Publication No. 10-2009-0009578, a lot of manual operations of a technician such as contacting a first coupler and a second coupler to each other, tightening a tightening nut, inserting a fastening pin, and so on are required to be performed when rebars are connected to each other at a work site. Therefore, there have been problems that construction takes much time and has high cost. 
     In addition, a reinforcing bar coupler has been disclosed in Korean Patent Application Publication No. 10-2013-0143331. The disclosed reinforcing bar coupler includes: a sleeve having an inner portion thereof provided with a hollow portion communicating with an end portion in a longitudinal direction such that a reinforcing bar is inserted into the hollow portion through the end portion, and the sleeve being configured such that an outer circumferential surface thereof is provided with at least one opening portion that exposes the hollow portion; and a binding member having an inner side surface thereof provided with a plurality of joint grooves so that a joint of the reinforcing bar is fitted to the plurality of joint grooves, the binding member being interposed between an inner circumferential surface of the sleeve and an outer circumferential surface of the rebar that is inserted into the hollow portion of the sleeve. 
     However, in a conventional one-touch joint reinforcing bar coupler, since a holding force of a reinforcing bar is realized by a binding member, the holding force is relatively weak. Therefore, there has been a problem that a situation in which an initial slight movement occurs or the amount of a slipping of the reinforcing bar increases. 
     In order to solve this problem, it has been disclosed in Korean Patent No. 10-1951882 that a supporting member is mounted at a center portion of a one-touch reinforcing bar coupler such that a connection portion of a reinforcing bar is capable of being prevented from being located on one side. However, there has been a problem that it is difficult for a worker to estimate a length inserted into opposite sides of a coupler body when different reinforcing bars are connected to each other. 
     SUMMARY 
     Accordingly, the present disclosure has been made keeping in mind the above problems occurring in the related art, and the present disclosure is intended to propose a rebar movement-prevention-type one-touch coupler in a new type in which a structure is provided, the structure being configured such that rebars are inserted therein while a pair of housing units connected to a connection socket is in a state of being spaced apart from each other, and such that a fixation of the rebars is completed by performing an additional tightening operation to each of the housing units, thereby realizing the fixation of the rebars without allowing a movement of the rebars. 
     In addition, the present disclosure is intended to propose a rebar movement-prevention-type one-touch coupler in a new type in which a piece body ring having a rectangular vertical cross-section is provided and to which a plurality of piece bodies are fitted, thereby being capable of allowing the plurality of piece bodies to be stably and easily inserted inside the housing units while the plurality of piece bodies is positioned in place on a circular line and is prevented from being separated toward the outside, and thereby being capable of allowing the plurality of piece bodies to be disposed inside the housing units while maintaining the same height so that the rebars are securely fixed without an misoperation. 
     In addition, the present disclosure is intended to allow estimating of the coupling lengths between the pair of housing units and opposite sides of the connection socket when a worker connects the rebars to each other, by forming a non-thread machined surface on the center of the connection socket that is coupled to each of the housing units. 
     In addition, the present disclosure is intended to maximize the operational effect of a secure fixation structure of the rebars without a movement of the rebars, which is realized by double-tightening each of the housing units performed by the additional tightening operation of the worker and a finial tightening operation by using a separate tightening device after an initial setting mode for connecting the housing units to each other in a state of being spaced apart, thereby allowing the final tightening operation to be performed by using the separate tightening device such as a wrench since one side of the outer circumferential surface of each of the housing units is provided with a coupling guide surface having a polygonal shape. 
     In order to achieve the above objectives, according to one aspect of the present disclosure, there is provided a rebar movement-prevention-type one-touch coupler including: a pair of housing units each of which is formed in a tubular shape in which a rebar inlet hole provided at one side thereof and a socket mounting hole provided at the other side thereof are connected with each other via an inner passage, the pair of housing units being configured to have both a tapered inner circumferential surface of which an inner diameter becomes smaller in a side direction and a non-tapered inner circumferential surface, the non-tapered inner circumferential surface being configured such that a diameter thereof has the same diameter as a diameter of the socket mounting hole and being connected to the socket mounting hole; a pair of piece body units each of which is provided with a plurality of piece bodies that is inserted into and disposed in the inner passage while the plurality of piece bodies is in a state of being spaced apart from each other in a circular line, with a plurality of locking protrusions formed on an inner side surface of each of the plurality of piece bodies in a longitudinal direction thereof; a pair of springs each of which is configured to respectively provide an elastic force in a longitudinal direction thereof to each of the piece body units by being inserted into the inner passage of each of the housing units and by being fitted to a second end of each of the piece body units; and a connection socket formed in a cylindrical shape and disposed between the pair of housing units, the connection socket being configured to connect the pair of housing units to each other by being coupled to the opposed non-tapered inner circumferential surfaces of the housing units, and the connection socket being in close contact with and fixed to the pair of springs, wherein the rebar movement-prevention-type one-touch coupler is configured to be operated in an initial setting mode in which each of the housing units is in a state of being spaced apart from each other by an initial coupling length in which the pair of housing units are partially coupled to the connection socket, and is configured to be operated in a rebar fixing mode in which each of the housing units is coupled to the connection socket up to an additional coupling length while a rebar is in a state of being inserted into the inner passage through the rebar inlet hole, so that the rebar is fixed without a movement of the rebar while each of the springs and each of the piece bodies are guided to be moved to the side direction. 
     According to the rebar movement-prevention-type one-touch coupler of the present disclosure, the rebar movement-prevention-type one-touch coupler may further include a piece body ring configured to guide the plurality of piece bodies constituting each of the piece body units to be positioned in place on the circular line, and the inner side surface of each of the piece bodies may be provided with a piece body ring insertion groove having a predetermined height in a circumferential direction, so that the plurality of piece bodies may be inserted into and disposed in the inner passage of each of the housing units while maintaining the same height by the piece body ring that is fitted to the piece body ring insertion groove. 
     According to the rebar movement-prevention-type one-touch coupler of the present disclosure, the piece body ring may be formed of an elastic material and may be formed in a major arc shape that is provided with an incision portion in which a predetermined section is cut, and the plurality of piece bodies inserted into the inner passage of each of the housing units may be in close contact with the tapered inner circumferential surface. 
     According to the rebar movement-prevention-type one-touch coupler of the present disclosure, each of the housing units may further include: a female thread machined surface that is formed at the non-tapered inner circumferential surface, and the connection socket may further include: male thread machined surfaces formed at opposite ends of an outer circumferential surface of the connection socket, respectively, so that each of the male thread machined surfaces is coupled to each of the female thread machined surfaces; and a non-thread machined surface recessively formed between the male thread machined surfaces and positioned at a center of an outer circumferential surface of each of the housing units. 
     According to the rebar movement-prevention-type one-touch coupler of the present disclosure, each of the housing units may further include: a coupling guide surface in which one side of an outer circumferential surface thereof is formed in a polygonal shape. 
     According to the rebar movement-prevention-type one-touch coupler of the present disclosure, the rebars are inserted into the pair of housing units while the pair of housing units coupled to the connection socket is in a state of being spaced apart, and the fixation of the rebars is completed by performing the additional tightening operation to the pair of housing units, so that the secure fixation of the rebars without movement of the rebars may be realized. 
     In addition, according to the rebar movement-prevention-type one-touch coupler of the present disclosure, the plurality of piece bodies is positioned in place on the circular line since the plurality of piece bodies is fitted to the piece body ring having the rectangular vertical cross-sectional shape, and the plurality of piece bodies is stably and easily inserted into each of the housing units without being separated to the outside and is disposed inside each of the housing units while maintaining the same height continuously, so that each of the piece bodies is capable of securely fixing the rebars without misoperation. 
     In addition, according to the rebar movement-prevention-type one-touch coupler of the present disclosure, since the non-thread machined surface is formed at the center of the connection socket that is coupled to each of the housing units, the worker is capable of estimating a coupling length between each of the housing units and opposite ends of the connection socket when the worker is connecting the rebars, and a working situation is capable of being easily checked at a glance. 
     In addition, according to the rebar movement-prevention-type one-touch coupler of the present disclosure, since the coupling guide surface having a polygonal shape that is capable of being inserted into the tightening device (wrench) is formed at the one side of the outer circumferential surface of each of the housing units in a longitudinal direction, each of the housing units is capable of being double-tightened by the additional tightening operation of the worker and the finial tightening operation by using a separate tightening device after performing the initial setting mode for connecting each of the housing units to each other with being spaced apart, so that the operational effect of the secure fixation structure of the rebars without movements of the rebars may be maximized. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view illustrating an initial setting mode of a rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 2  is a view illustrating a rebar fixing mode of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 3  shows external views illustrating a housing unit of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 4  is an internal cross-sectional view illustrating the housing unit of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 5  is a perspective view illustrating a piece body of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 6  is a side view illustrating the piece body of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 7  is a view illustrating a usage state of a piece body unit of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 8  is an external view illustrating a connection socket of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 9  is an internal cross-sectional view illustrating the connection socket of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
         FIG. 10  shows views illustrating a piece body ring of the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, an embodiment of the present disclosure will be described in detail with reference to  FIGS. 1 to 10  in the accompanying drawings. Meanwhile, in the drawings and the detailed description, illustration and explanation of the construction and operation of a general one-touch coupler which a person skilled in the art can easily understand will be simplified or omitted. Particularly, in the illustration of the drawings and the detailed description, illustration and description on the detailed technical construction and operation of elements, which have not direct relevance with the technical features of the present disclosure, will be omitted, and only the technical constructions related with the present disclosure will be briefly illustrated or explained. 
     Referring to  FIGS. 1 and 2 , a rebar movement-prevention-type one-touch coupler  1  according to an embodiment of the present disclosure is a device configured to connect rebars  10  to each other, and includes a housing unit  100 , a piece body unit  200 , a spring  300 , a connection socket  400 , and a piece body ring  500 . 
     A pair of housing units  100  is arranged symmetrically on a straight line so that the rebars  10  can be connected to each other. One side of the housing unit  100  is provided with a rebar inlet hole  111 , and the other side of the housing unit  100  is provided with a socket mounting hole  112 . Therefore, it is preferable that the rebar inlet hole  111  of the housing unit  100  is configured to be larger than an outer diameter of the rebar  10  so that the rebar  10  is capable of being inserted into the rebar inlet hole  111  from an outside. Such a housing unit  100  is formed in a tubular shape, so that the rebar inlet hole  111  and the socket mounting hole  112  are connected with each other via an inner passage  110  of the housing unit  100 . 
     In particular, the housing unit  100  has a tapered inner circumferential surface  120  of which an inner diameter becomes smaller toward the rebar inlet hole  111  that is positioned at the one side of the housing unit  100 . In addition, a non-tapered inner circumferential surface  130  of which a diameter is the same as a diameter of the socket mounting hole  112  is provided at the other side of the housing unit  100 . Such a non-tapered inner circumferential surface  130  may be provided with a female thread machined surface  131  so that the non-tapered inner circumferential surface  130  is coupled to the connection socket  400 , and it is preferable that a male thread machined surface  431  is formed at an outer circumferential surface of the connection socket  400 . In addition, at the non-tapered inner circumferential surface  130  of the housing unit  100 , the fastening distance can be limited by forming the female thread machined surface  131  only at a section to which the connection socket  400  is coupled. 
     In addition, a coupling guide surface  140  formed in a polygonal shape may be formed at one side of an outer circumferential surface of the housing unit  100 . When the pair of housing units  100  is coupled to the connection socket  400 , the pair of housing units  100  may be securely fastened to the connection socket  400  by using a device such as a wrench or a monkey spanner since the coupling guide surface  140  is respectively formed at an end of the pair of housing units  100 . Therefore, it is preferable that the one side of the outer circumferential surface of the housing unit  100  is formed in a hexagonal shape or an octagonal shape in a longitudinal direction, so that a slipping situation that may occur during a fastening operation may be prevented by a structure that has the coupling guide surface  140 . In addition, a safety guide surface formed in a planar shape or a curved shape may be provided at an edge of the coupling guide surface  140 . Such a safety guide surface prevents a worker from being injured from the sharp edge of the coupling guide surface  140  when the worker performs to couple the housing unit  100  to the connection socket  400 . 
     Referring to  FIGS. 5 to 7 , the piece body unit  200  is formed of a plurality of piece bodies  210 , and is respectively inserted into the pair of housing units  100 . With the piece body unit  200  being in a state in which the plurality of piece bodies  210  is arranged to be spaced apart in a circular line, the piece body unit  200  is inserted into and disposed on the inner passage  110  through the socket mounting hole  112  of the housing unit  100 . In addition, at an inner side surface of the piece body unit  200 , a plurality of locking protrusions  211  is provided in a longitudinal direction, and serves to fix the rebar  10  while being in close contact with an outer circumferential surface of the rebar  10 . The locking protrusion  211  is configured such that an inclined protrusion is formed in a direction toward the socket mounting hole  112  at the other side, the direction being opposite to a direction in which the rebar  10  is introduced. Accordingly, when the locking protrusion  211  is in close contact with the rebar  10 , the locking protrusion  211  may prevent the slipping situation and may increase a friction force. 
     In order to securely hold the rebar  10  and to keep a balance, it is preferable that one piece body unit  200  is formed of four piece bodies  210 . 
     Here, at the inner side surface of the piece body  210 , a piece body ring insertion groove  212  having a predetermined width (d) in a longitudinal direction may be formed in a circumferential direction. In order for each of the piece bodies  210  to maintain a state in which the piece body ring  500  is fitted and fixed to the each of the piece bodies  210 , it is preferable that the predetermined width (d) of the piece body ring insertion groove  212  is configured to be the same as a height (H) of the piece body ring  500 . 
     In addition, each of the piece bodies  210  may be formed of an expanded surface body  210   a , a spring seating surface body  210   b , and a spring guide surface body  210   c.    
     First, the expanded surface body  210   a  is configured such that an outer diameter thereof becomes smaller toward the one side thereof from the other side thereof. Such an expanded surface body  210   a  is disposed such that the expanded surface body  210   a  is to be in contact with the tapered inner circumferential surface  120  of the housing unit  100 . In addition, when the housing unit  100  and the connection socket  400  are coupled to each other, the expanded surface body  210   a  smoothly moves toward the rebar inlet hole  111  along the tapered inner circumferential surface  120 , thereby allowing the locking protrusion  211  to be securely engaged with and fixed to the outer circumferential surface of the rebar  10 . 
     The spring seating surface body  210   b  is configured to be stepped toward an inner circumferential surface thereof from a second end of the expanded surface body  210   a . By such a spring seating surface body  210   b , a space into which the spring  300  is capable of being inserted is formed, and the spring  300  inserted into the spring seating surface body  210   b  through the socket mounting hole  112  pressurizes the spring seating surface body  210   b  by a coupling of the housing unit  100  and the connection socket  400 . By a pressure of the spring  300  acting on the spring seating surface body  210   b , the expanded surface body  210   a  is can be moved toward the rebar inlet hole  111  along the tapered inner circumferential surface  120 . 
     The spring guide surface body  210   c  is formed at a second end of the spring seating surface body  210   b  and extends such that an outer diameter thereof is constant. In order to guide the spring  300  to be inserted into the spring seating surface body  210   b , it is preferable that the spring guide surface body  210   c  is configured to be smaller than an inner diameter of the spring  300 . 
     Referring to  FIGS. 1 to 4 , the spring  300  is respectively disposed at the pair of housing units  100 , and is stably inserted into an inner wall surface of the inner passage  110  through the socket mounting hole  112  and is fitted to a second end of the piece body unit  200 , thereby serving as providing an elastic force in a longitudinal direction to the piece body unit  200 . Such a spring  300  is disposed at the non-tapered inner circumferential surface  130  side of the housing unit  100 , and it is preferable that the outer diameter of the spring  300  is configured to be equal to or lower than a diameter of the non-tapered inner circumferential surface  130 . In addition, it is preferable that the outer diameter of the spring  300  is configured to be larger than a diameter of the tapered inner circumferential surface  120  and pressurizes the second end of the piece body unit  200  from a domain of the non-tapered inner circumferential surface  130 . 
     Referring to  FIGS. 8 and 9 , the connection socket  400  is disposed between the pair of housing units  100 , and is formed in a cylindrical shape, thereby being coupled to the pair of housing units  100 . In addition, the connection socket  400  is coupled to the non-tapered inner circumferential surface  130  of each of the housing units  100 , and connects the pair of housing units  100  to each other. In order for the connection socket  400  to be coupled to the female thread machined surface  131  that is respectively formed at the non-tapered inner circumferential surface  130  of each of the housing units  100 , the male thread machined surface  431  is respectively formed at opposite ends of the outer circumferential surface of the connection socket  400 . In addition, a non-thread machined surface  432  is recessively formed at a space between the male thread machined surfaces  431  of the connection socket  400 , and is positioned at a center of the outer circumferential surface of the housing unit  100 . Such a non-thread machined surface  432  allows a worker to identify a coupling length between the pair of housing units  100  and the connection socket  400  when the pair of housing units  100  is coupled to the connection socket  400 , so that the coupling length with respect to the rebar  10  is capable of being adjusted and a working progress may be easily checked. 
     In addition, a rebar seating surface  433  is formed in the connection socket  400  such that an end of the rebar  10  is capable of being seated on the rebar seating surface  433  while the rebar  10  is inserted into an inner portion of the connection socket  400 . It is preferable that such a rebar seating surface  433  is centrally disposed so that the rebars  10  are capable of being inserted in the same length to each other. In addition, it is preferable that the inner diameter of the connection socket  400  is configured to be smaller than the inner diameter of the spring  300  and the outer diameter of the connection socket  400  is configured to be larger than the outer diameter of the spring  300  so that the each of the opposite sides of the connection socket  400  stably pressurizes the second end of the spring  300 . 
     Referring to  FIGS. 1 to 3 , and  FIG. 10 , the piece body ring  500  is inserted into the piece body ring insertion groove  212 , and guides the plurality of piece bodies  210  to be positioned in place on the circular line. In addition, the piece body ring  500  allows the piece bodies  210  inserted into the inner passage  110  of the housing unit  100  to be in close contact with the tapered inner circumferential surface  120 . To this end, an initial outer diameter of the piece body ring  500  before performing a tightening operation is configured to be in a size range in which the plurality of piece bodies  210  is in close contact with the tapered inner circumferential surface  120 . 
     In addition, the plurality of piece bodies  210  maintains the same height by the piece body ring  500  that is fitted to the piece body ring insertion groove  212 , and is stably inserted into and disposed on the inner wall surface of the inner passage  110  of the housing unit  100 . In addition, the piece body ring  500  prevents the plurality of piece bodies  210  from being deviated by a movement of the housing unit  100  while the housing unit  100  is rotated so as to perform a tightening operation to the inserted rebar  10 , and guides the piece body unit  200  positioned around the rebar  10  to uniformly and stably tighten the rebar  10 . 
     And the piece body ring  500  is formed of an elastic material and formed in a major arc shape that is provided with an incision portion  510  in which a predetermined section is cut, so that the diameter of the piece body ring  500  is capable of being adjusted by the incision portion  510  as the piece body ring  500  moves depending on the rotation movement of the housing unit  100 . Such a piece body ring  500  may be formed of a metal material having elasticity or a resin material having elasticity. In addition, the piece body ring  500  is formed in a ring shape that has a rectangular vertical cross-sectional shape, and the height (H) of the piece body ring  500  is configured to have the same height of the predetermined width (d) of the piece ring insertion groove  212 , thereby allowing the piece body ring  500  to be fitted to the plurality of piece bodies  210 . It is preferable that the height (H) of the piece body ring  500  and the predetermined width (d) of the piece ring insertion groove  212  are 3 mm to 15 mm. 
     Meanwhile, the diameter of the piece body ring  500  is configured to be adjusted by the incision portion  510 . In addition, the piece body ring  500  serves as a linkage that allows each of the piece bodies  210  positioned in place forming the piece body unit  200  to be simultaneously moved toward the rebar inlet hole  111 . 
     Referring to  FIG. 1 , the pair of housing units  100  is operated in an initial setting mode in which the pair of housing units  100  is in a state of being spaced apart from each other by an initial coupling length (L) in which the connection socket  400  is partially coupled to the pair of housing units  100 . 
     In addition, referring to  FIG. 2 , in a state in which the rebar  10  is inserted into the inner passage  110  through the rebar inlet hole  111 , the pair of housing units  100  is further coupled by an additional coupling length (L′), so that the spring  300  and the piece bodies  210  are guided to be moved to the one side direction, thereby the pair of housing units  100  being operated in a rebar fixing mode in which the rebar  10  is fixed without a movement of the rebar  10 . The portion up to the non-thread machined surface  432  of the connection socket  400  may be included in the additional coupling length (L′), and an additional coupling operation may be performed by the worker, depending on a working situation. Here, since the one side of the outer circumferential surface of the housing unit  100  is provided with the coupling guide surface  140  having the polygonal shape in the longitudinal direction, a final tightening operation of the housing unit  100  is capable of being performed by using a separate tightening device such as a wrench. Therefore, after the initial setting mode for separately connecting the pair of housing units  100 , the rebar fixing mode in which the pair of housing units  100  is double-tightened by the additional tightening operation performed from the worker and the finial tightening operation performed by using the separate tightening device is capable of being performed. Through this, the operational effect of a secure fixation structure without a movement of a rebar may be maximized. The piece body ring  500  having the rectangular vertical cross-sectional shape to which the plurality of piece bodies  210  is fitted is provided in the present disclosure. Therefore, as the plurality of the piece bodies  210  is positioned in place on the circular line, the plurality of piece bodies  210  are capable of being stably and easily inserted inside the housing unit  100  without being separated to the outside, and is disposed inside the housing unit  100  while maintaining the same height, thereby securely fixing the rebar without a misoperation. 
     Although the rebar movement-prevention-type one-touch coupler according to an embodiment of the present disclosure has been described with reference to the accompanying drawings as described above, this is merely an example, and those skilled in the art will appreciate that various changes and modifications are possible without departing from the technical spirit of the present disclosure.