WO2019151590A1

WO2019151590A1 - Coupler for reinforcing bar connection

Info

Publication number: WO2019151590A1
Application number: PCT/KR2018/008194
Authority: WO
Inventors: 장성만
Original assignee: 현대금속산업(주); 장성만
Priority date: 2018-01-30
Filing date: 2018-07-20
Publication date: 2019-08-08
Also published as: KR101866816B1

Abstract

The present invention relates to a coupler for reinforcing bar connection, which is used to extend the length of a reinforcing bar in construction of a reinforced concrete structure and, more specifically, to a coupler for reinforcing bar connection in which: a key holder is inserted in a hollow space of a housing, wherein a pair of reinforcing bars are inserted in the hollow space; the key holder maintains inserted in the hollow space of the housing by means of a finishing cap coupled to an end of the housing; and the key holder includes a plurality of keys for pressing an outer circumference of a reinforcing bar inserted in an insertion hole of the finishing cap and an inner circumferential surface of the insertion hole of the finishing cap. Accordingly, the coupler can connect the pair of the reinforcing bars to each other by the housing by using a method in which each of the pair of the reinforcing bars is pushed into the hollow space of the housing, and is then pulled again.

Description

Coupler for rebar connection

The present invention relates to a coupler for connecting reinforcing bars used to extend the length of the reinforcing bar when constructing a reinforced concrete structure, and more particularly, a key holder is embedded in a hollow of a housing into which a pair of reinforcing bars are inserted. Maintain the state embedded in the housing hollow by the closing cap fastened to the end, the key holder is provided with a plurality of keys for pressing the outer periphery of the reinforcing bar inserted into the insertion hole of the closing cap and the inner peripheral surface of the insertion hole of the closing cap In addition, the present invention relates to a coupler for reinforcing bar connections that can be connected to each other by a pair of reinforcing bars by pushing each of the pair of reinforcing bars into the housing hollow and then pulling back.

In order to connect reinforcing bars for use in concrete structures at various construction sites, in the past, reinforcing bars were bundled and fixed with wires in a double overlapping state. The work is cumbersome and the center of the reinforcing bar is not vertical, not only crooked, but also because the strength of the wire is weak, there is a problem that the connection state is released easily.

In order to solve this problem, rebar joints (couplers) have been developed and used for easily and rigidly connecting reinforcing bars by means other than wire.

Most of the conventionally developed reinforcing bars are to insert the reinforcing bars into the housing and then fix them by screwing the housing, which is structurally complicated and difficult to connect the rebars, which requires a lot of time, effort, and cost. have.

The following is a typical prior art related to the reinforcing bar connection device.

Republic of Korea Utility Model Registration No. 20-0321183 relates to a reinforcing bar connection device, which is formed in a semi-circle to form a plurality of grooves on the inner circumference and tapered the outer circumference to form a pair of inner ends of the reinforcing bars A coupling piece to be coupled to the outer periphery, respectively, and a coupler having a tapered hole formed on one side of the inner side to allow the coupling piece to be inserted therein, and a female thread formed on the other inner periphery, and to be coupled to the female screw of the joint coupler. A male screw was formed on one side of the outer periphery and a taper hole was formed to allow the fastening piece to be inserted into the inner peripheral portion.

In addition, the rebar joint device according to the prior art realizes the effect of preventing the shaking in the joint device and improve the rigidity of the compression of the reinforcing bar by coupling the two ends of the reinforcing bar is in close contact with each other, but the Since the coupling coupler should be fixed by turning, it is difficult to connect the reinforcing bar, which requires a lot of time, effort, and cost. Therefore, continuous research and development is required to solve the problem.

The present invention has been made in order to improve the problems according to the prior art of the coupler for connecting reinforcing bar, the conventional coupler for connecting the reinforcing bar is not firmly fastened between the end of the reinforcing bar and the coupler for connecting the reinforcing bar coupler connected to the coupler When a tensile force was applied to the rebar, a problem occurred in that the rebar was easily pulled out from the coupler for connecting the rebar;

In addition, when a pair of reinforcing bars are connected to each other by a coupler for reinforcing bars, or when external concrete is applied to reinforcing steel structures, a pair of reinforcing bars are easily connected to the reinforcing bar coupler. There was a problem of lateral shaking or bending;

In addition, when reinforcing the reinforcing bar to the coupler for connecting the reinforcing bar, when the reinforcing bar is twisted to the rebar connection coupler, the reinforcing bar in the rebar connection coupler must be separated and refastened. It was difficult to separate twisted bars in the coupler for reinforcing bars;

In addition, when a worker mistakenly connects the reinforcing bar coupler to the reinforcing bar part other than the reinforcing bar part, it is difficult to separate the reinforcing bar connected to the reinforcing bar coupler, thereby providing a solution. Its main purpose is to do it.

The present invention is to realize the desired object as described above,

A rebar coupler for interconnecting a pair of reinforcing bars, the coupler comprising: a housing in which a hollow is formed in a longitudinal direction, and a central separation partition for dividing the hollow into a first hollow and a second hollow is formed in the center of the hollow; Reinforcing bars are formed in the first hollow and the second hollow, respectively, and each includes a reinforcing hole for injecting a portion of the end portion of each of the pair of reinforcing bars, and the outer diameter of one side located at the center of the housing hollow is A pair of key holders configured in a truncated cone shape having an outer diameter larger than that of the other side portion positioned outside, and having a plurality of keys for pressing the outer circumference of the steel bars embedded in the reinforcing bars; A pair of elastic springs embedded in the first hollow and the second hollow, respectively, for pressing each of the pair of key holders toward both ends in the longitudinal direction of the housing; Each of the hollows of the housing is inserted into and fastened to each other, a portion is inserted into the housing hollow corresponding to the outside of the key holder, the insertion portion for inserting the end portion of each of the pair of reinforcing bars and the portion of the key holder are formed respectively; The inner circumference of the insertion hole suggests a coupler for connecting the reinforcement, including a pair of finishing caps configured to have a shape corresponding to the outer circumference of the truncated cone-shaped key holder.

Coupler for reinforcing bar connection according to the present invention presented as described above as the portion of the reinforcing bar end in the reinforcing hole of the key holder is pulled out of the housing, the reinforcement pressure by the key increases the coupler for connecting the reinforcing bar more strongly Effect can be obtained that can be bound to;

In addition, when the tubular reinforcing holder is further provided in the central separation partition located at the center of the hollow of the housing, the pair of reinforcing bars connected to each other because the end of the reinforcing bars embedded in the hollow of the housing can be supported by the reinforcing holder. It is possible to obtain an effect of not being easily shaken or bent laterally around the reinforcing bar coupler;

In addition, when the thread is formed on the inner circumferential surface of the plurality of keys, and a protruding pin for preventing rotation of the key holder is further provided on the inner circumferential surface of the insertion cap of the plurality of keys, the rebar is fastened to the housing in a twisted state, or the corresponding reinforcement portion. When the reinforcing bars are not fitted, the reinforcing bars can be easily rotated in the insertion hole of the key holder, thereby obtaining the effect of easily removing the reinforcing bars from the housing.

1 is a perspective view showing a state in which rebar is fastened to the coupler for connecting bars according to a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view showing a coupler for connecting bars according to a preferred embodiment of the present invention.

Figure 3 is a side cross-sectional view showing a coupler for connecting bars according to a preferred embodiment of the present invention.

Figure 4 is an exploded perspective view showing a key holder of the coupler for connecting bars according to a preferred embodiment of the present invention.

Figures 5a to 5c is a side cross-sectional view showing a process of coupling the reinforcing bar to the coupler for reinforcing bar connection according to an embodiment of the present invention.

Figure 6 is a side cross-sectional perspective view showing a case where the reinforcing bar holder is further provided in the housing of the coupler for connecting bars according to a preferred embodiment of the present invention.

Figure 7 is a side cross-sectional view showing a case where the reinforcing bar holder is further provided in the housing of the coupler for connecting bars according to a preferred embodiment of the present invention.

8 is a partially separated perspective view illustrating a case in which a protruding pin indentation groove is formed in a key holder of a coupler for rebar connection according to a preferred embodiment of the present invention;

Figure 9 is a side cross-sectional view showing a case where the protruding pin is further provided in the closing cap of the coupler for reinforcing bar connection according to an embodiment of the present invention.

10 is a perspective view showing a case in which a protruding pin indentation groove is formed in a key holder of a coupler for reinforcing bar connections according to an exemplary embodiment of the present invention;

The present invention relates to a coupler for connecting the reinforcing bars used to extend the length of the reinforcing bars 100 when construction of the reinforcement 100 concrete structure, to connect a pair of reinforcing bars 100 to each other (20) for connecting the reinforcing bars In the coupler, the hollow 11 is formed in the longitudinal direction, and the central separation partition 12 is divided into the hollow 11 by the first hollow 11a and the second hollow 11b. A housing 10 formed at the center of the 11; Reinforcing bar holes 31 are formed in the first hollow 11a and the second hollow 11b, respectively, and the inner end portions 20 of the pair of reinforcing bars 100 are respectively embedded in the first hollow 11a and the second hollow 11b. The outer diameter of one side positioned at the center of the hollow 10 of the housing 10 is configured in the shape of a truncated cone having a larger outer diameter than the outer diameter of the other side positioned outside the hollow 11 of the housing 10. A pair of key holders 30 having a plurality of keys 20 for pressing the outer circumference of the reinforcing bar 100 embedded in the inner hole 31; A pair of elastic springs each inserted into the first hollow 11a and the second hollow 11b, each of which presses each of the pair of key holders 30 toward both ends in the longitudinal direction of the housing 10; 40) and; Partly inserted into both sides of the hollow 11 of the housing 10 and fastened to each other, a portion of the housing 10 corresponding to the outside of the key holder 30 is fitted into the hollow 11, and the pair of reinforcing bars 100 An insertion hole 51 is formed to respectively insert a portion of each end portion and a portion of the key holder 30, and the inner circumference of the insertion hole 51 corresponds to the outer circumference of the truncated key holder 30. It relates to a coupler for reinforcing bar connection comprising a; a pair of closing cap 50 is configured to have a shape.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 10 showing an embodiment of the present invention.

First, the coupler for connecting reinforcing bars according to the present invention (hereinafter, referred to as a 'coupler') is coupled to each other by coupling a pair of reinforcing bars 100 to the longitudinal direction of the reinforcing bar 100 as shown in FIG. Is used for the purpose of extending (20) the length.

In addition, the end portion of the reinforcing bars 100 interconnected by the coupler according to the present invention (hereinafter, referred to as 'reinforcement 100 end portion') is a portion corresponding to the longitudinal end of the reinforcing bars 100, It may correspond to the end of the reinforcing bar 100 and is in a state of not having a separate end processing.

That is, the outer circumference of the end portion of the reinforcement 100 is formed with irregularities or threads to increase the fastening force (20) between the inner peripheral surface of the key 20 included in the key holder 30 and the end portion of the reinforcement 100. The structure may be configured, or the structure in which the unevenness or the screw thread is not formed may be configured.

In addition, the outside of the reinforcing bar 100 may have a length in the longitudinal direction of the reinforcing bar 100 and the one or more ribs protruding from the outer circumferential surface of the reinforcing bar 100, like the general reinforcing bar 100, the length of the reinforcing bar 100 A plurality of nodes 110 having a semicircular length in a direction perpendicular to the direction may be formed.

In this case, when the plurality of nodes 110 are formed on the outer circumferential surface of the rebar 100 as described above, the other node 110 adjacent to any one node 110 of the plurality of nodes 110 is the reinforcement 100 It is preferred to be spaced apart from each other in the upper and lower portions of the longitudinal direction.

Hereinafter, the present invention will be described as a preferred embodiment when the reinforcing bar 100 is spaced apart from each other by forming a plurality of nodes 110 on the outer peripheral surface as described above.

In addition, the coupler according to the present invention does not require a separate tightening operation of the rebar 100 by the operator to fasten the end portion of the reinforcement 100 to the coupler 20, the operator of the coupler housing 10 of the present invention When the inner portion of the reinforcing rod 100 is pushed into the hollow 11 to be inserted 20, a key provided in the key holder 30 embedded in the hollow 11 of the housing 10 may be provided. Press the portion of the end of the reinforcement (100) to fasten the reinforcement (100) to the coupler (20) is made in a one-touch manner.

That is, the coupler according to the present invention macroscopically, the housing 10, a pair of key holder 30 having a plurality of keys 20, a pair of elastic spring 40 and a pair of closing cap 50 It is configured to include.

In detail, the housing 10 has a hollow 11 formed in a longitudinal direction, and the hollow 11 is divided into a first hollow 11a and a second hollow 11b by a central separation partition 20. 12 is formed in the center of the hollow 11, the end portion of the reinforcing bar 100 is inserted into each of both sides of the hollow 11 formed therein is connected to each other (20).

That is, the housing 10 is composed of a single body, not divided into a plurality of, the hollow 11 formed in the center is formed in the longitudinal direction of the housing 10, the reinforcement 100 in the hollow 11 A key holder 30 and a closing cap 50 having a plurality of keys 20 described below may be inserted between the housing 100 and the reinforcing bar 100 embedded in the hollow 11 while allowing an end portion to be embedded therein. You can embed this part.

At this time, the inner diameter of the hollow 11 formed in the housing 10 is larger than the outer diameter of the key holder 30 below, and the outer diameter of the portion of the closing cap 50 below (the outer diameter of the portion fastened to the housing 10) Same configuration.

In addition, the housing 10 is composed of a single body so that the housing 10 is not broken or separated in the longitudinal direction by a pulling force that may be applied from the reinforcement 100 embedded in each of the hollow 10 of the housing 10. It is composed.

In addition, in the hollow 11 of the housing 10 of the above configuration, the central separation partition 12 for dividing the hollow 11 with respect to the longitudinal direction of the housing 10 20 is formed, and in this case, The hollow 11 bisected by the central separation barrier 12 is divided into a first hollow 11a positioned at one side of the housing 10 and a second hollow 11b positioned at the other side.

In this case, each of the first hollow 11a and the second hollow 11b has an end portion of each of the reinforcing bars 100a and the other of the reinforcing bars 100b of the pair of reinforcing bars 100, respectively, The end portion of the reinforcement 100 of the following key holder 30 and the closing cap 50 embedded in the first hollow (11a), the key holder 30 and the closing cap 50 embedded in the second hollow (11b) It is configured to be fastened to the housing 10 by the.

That is, the coupler according to the present invention is configured in a form in which one side and the other side are symmetrical with respect to the central separation partition 12 formed in the hollow 11 of the housing 10, and in detail, the first hollow ( 11a) and the second hollow (11b) is embedded in any one of the key holder 30 is composed of a pair, a part of any one of the closing cap 50 is composed of a pair is inserted into and fastened.

In addition, the central separation partition 12 may be configured to block the center of the hollow 11 of the housing 10 to completely block the first hollow 11a and the second hollow 11b, the central separation partition 12 The through hole 12a is formed in the central portion of the c) so that the first hollow 11a and the second hollow 11b communicate with each other 20.

However, the protrusion height of the central separation partition 12 from the inner circumferential surface of the housing 11 hollow 11 to the center of the housing 10 may be appropriately adjusted according to the judgment of those skilled in the art, but the other side or one side of the central separation partition 12 The pair of elastic springs 40 respectively positioned below are supported by the central separation partition 12 so that any one of the elastic springs 40 embedded in the first hollow 11a is transferred to the second hollow 11b. The other elastic spring 40 embedded in the second hollow 11b does not fall into the second hollow 11b, and is inserted through the reinforcing bars 31 formed in each of the pair of key holders 30 below. Part of the end portion of the reinforcing bar 100 is preferably blocked so as not to penetrate the through hole 12a by being blocked by the central separation partition 12.

In relation to the above, the central separation partition 12 is configured to further include a reinforcing holder 14 having a hollow 15 having a length in the same direction as the longitudinal direction of the hollow 11 of the housing 10. The hollow 15 of the reinforcing holder 14 is configured to have an inner diameter corresponding to an outer diameter of an end of each of the pair of reinforcing bars 100 connected to each other, and an end of each of the pair of reinforcing bars 100 is It may be configured to be inserted into both sides of the hollow 15 of the reinforcing holder 14, respectively.

That is, the reinforcement holder 14 is further provided in the central separation partition 12 of the configuration, and the end portion of the reinforcement 100 inserted into the center of the hollow 11 of the housing 10 is moved by the reinforcing holder 14. The pair of rebars 100 supported and, as a result, embedded in the housing 10 hollow 11 can always maintain the same longitudinal direction as the housing 10.

Specifically, the reinforcing holder 14 is configured in the form of a tubular shape formed inside the hollow 15 having a length in the same direction as the longitudinal direction of the hollow 11 of the housing 10, as shown in FIG. Each half of the longitudinal direction with respect to the partition wall 12 is disposed in the first hollow 11a and the second hollow 11b of the housing 10, respectively.

At this time, the reinforcing holder 14 is divided into two centered around the central separation partition 12 so that one of the reinforcing holder 14 is fixed to one side of the central separation partition 12, the other side The reinforcing holder 14 may be configured to maintain a fixed state on the other side of the central separation partition 12.

In this state, the central portion of the central separation partition 12 protrudes toward the center of the hollow 15 of the reinforcing holder 14, and the reinforcing bars 100 embedded in both of the reinforcing holder 14 and the hollow 15 are respectively. Any one of the reinforcing bars 100 interposed in the central portion of the central separation partition 12 protruding in the center of the hollow 15 of the reinforcing holder 14 and inserted into the hollow 15 of either of the reinforcing holders 14. ) Does not pass to the other reinforcing holder 14 hollow 15, the other side of the reinforcing bar holder 14 and the other one of the reinforcing bars (100) embedded in the hollow 15 Reinforcement holder 14 of the hollow 15, so as not to fall, a portion of the end portion of the pair of reinforcing bars (100) around the central separation partition 12 to maintain the same length embedded in the housing (11) hollow 11 The effect of making it possible can be realized.

In addition, the hollow 15 of the reinforcing holder 14 may be configured to have an outer diameter of a smaller size than the inner diameter of the hollow 10 of the housing 10, and may be configured to be inserted into the hollow 11 of the housing 10. It is configured to have an inner diameter corresponding to the outer diameter of the end of each of the pair of reinforcing bars 100 to be interconnected (same or large enough to minimize the clearance), embedded in the hollow 15 of the reinforcing holder 14 It is preferable that the end portion of the end portion of the reinforcement 100 is configured not to shake in the state in which the hollow 15 of the reinforcing holder 14 is embedded.

That is, the reinforcing holder 14 having the above configuration is inserted into the hollow 11 of the housing 10 through the reinforcing hole 31 of the key holder 30 embedded in the insertion hole 51 of the finishing cap 50. As long as the distal end portion of the end portion of the reinforcement 100 which is not pressurized by the key holder 30 can be kept in a fixed position on the reinforcement holder 14, the portion connected to each other by the coupler. When reinforcing the pair of reinforcement (100) or when placing concrete in the reinforced reinforcement (100) structure by the external force that can be applied to the pair of reinforcement (100) to realize the effect of not shaking sideways around the coupler You can.

In addition, the key holder 30 is embedded in the first hollow (11a) and the second hollow (11b), respectively, each of the end portion of each of the pair of reinforcement (100) is embedded in the reinforcement (20) A truncated cone having a hole 31 formed therein and having an outer diameter greater than that of the other side positioned outside the hollow 11 of the housing 10. It is configured in the form, a pair of configurations having a plurality of keys (20) for pressing the outer periphery of the reinforcing bars 100 embedded in the reinforcing bars 31, the hollow 11 of the housing 10 A part of the end portion of the reinforcing bar 100 which is inserted into the hollow 11 of the housing 10 is fixed to the housing 10 (more specifically, the closing cap 50).

That is, the pair of key holders 30 are inserted into the first hole 11a and the second hole 11b one by one, and each key holder 30 has a length of the end portion of the reinforcement 100 in the housing 10. Reinforced inboard hole 31 is inserted into the direction 20 is formed.

At this time, the reinforcing bar insertion hole 31 is configured to have an inner diameter larger than the outer diameter of the end portion of the reinforcing bar 100, the end portion of the reinforcing bar 100 is inserted into the reinforcing bar insertion hole 31 interfere with the key holder 30 It is configured not to be.

In addition, the key holder 30 has a truncated conical shape having an outer diameter greater than that of the other side positioned outside the hollow 10 of the housing 10 and the outer diameter of one side positioned at the center of the hollow 11. The outer circumferential surface of the plurality of keys 20 provided in the key holder 30 on the inner circumferential surface of the insertion hole 51 of the closing cap 50 having the inner circumference of the truncated conical shape (the outer circumferential surface of the plurality of keys 20 is also Forming a virtual outer circumferential surface in the form of a truncated cone).

In addition, the pair of key holder 30 is configured to be embedded in the hollow 11 of the housing 10 in a symmetrical form with respect to the central separation partition 12, each key holder having a peripheral shape of a truncated cone ( 30 corresponds to the insertion hole 51 of the following closing cap 50 respectively provided on both sides of the housing 10 hollow 11 is configured to be inserted.

In addition, the plurality of keys 20 provided in the

key holders

30 and 30 are configured to press the outer circumference of the reinforcing bar 100 embedded in the reinforcing bar insertion hole 31. When embedded in the inlet hole 31, the end of the reinforcing bar 100 embedded in the reinforcing hole 31 without moving into the central separation partition 12 with the key holder 30 is not limited to the inlet of the reinforcing bar 100. When a part is pulled in the direction of exit from the reinforcing bars 31, the reinforcement 100 is pressed to prevent the reinforcement of the reinforcing bars 100 from the reinforcing bars 31.

In addition, the key 20 of the configuration is gradually toward the distal end of the housing 10 from the longitudinal center of the housing 10 with respect to the virtual central axis 13 formed in the horizontal direction of the hollow 11 of the housing 10. An outer circumferential surface having a lower horizontal phase (the phase closer to the central axis 13) is formed, and the insertion hole 51 of the following closing cap 50 is also inclined with the inclined outer circumferential surface of the key 20. The inner peripheral surface inclined in the direction is formed.

That is, the plurality of keys 20 are circular in the horizontal direction (the same direction as the longitudinal direction of the housing 10) of the reinforcing bars 31 and each of which is radially formed in the key holder 30. It is provided with a configuration, the inside of each of the plurality of keys 20 to press the outer periphery of the reinforcing bars 100 embedded in the reinforcing bars (31), the outside of each of the plurality of keys 20 is the following closing cap (50) It forms a form to press the inner periphery of the reinforcement (100) is fixed to the inside of the reinforcing hole 31 of the key holder 30 and the insertion hole 51 of the following finishing cap 50 (20) is configured .

At this time, the virtual inner circumferential surface formed by the plurality of keys 20 is configured to have a size equal to or larger than the outer diameter of the outer circumferential surface of the end portion of the reinforcement 100.

In addition, the key holder 30 is movable in the center side and the center side to the end side from the end side of the hollow 11 of the housing 10 together with the plurality of keys 20 in a state of being embedded in the hollow 11 of the housing 10. In addition, the plurality of keys 20 are vertically movable toward the center of the reinforcing rod hole 31 and the inner circumferential surface of the closing cap 50, and the outer circumference of the end portion of the reinforcing rod 100 by the plurality of keys 20. If it can form a strong fastening force between the insertion hole 51 of the closing cap 50 may be configured in various forms, preferably the key holder 30 is the housing 10 corresponding to the central separation partition 12 side A rear end body 32 having a ring shape and positioned in the hollow 11 and having one side contacting the other side of the elastic spring 40 to continuously receive the pressing force of the elastic spring 40; Radially spaced apart from each other, one side is fastened to the rear end body 32 and the other side is extended to the longitudinal end of the housing 10, the plurality of keys 20 in the separation space 35 inside and outside, respectively A plurality of support bodies 33 to be inclined to move in a direction; And fastening each of the other sides of the plurality of support bodies 33 and having a ring-shaped front end body 34 inserted into the insertion hole 51 of the closing cap 50. have.

That is, the key holder 30 of the above configuration is composed of a rear end body 32, a plurality of support body 33 and the front end body 34.

Specifically, the rear end body 32 is a portion corresponding to one side of the key holder 30, is located in the hollow 11 of the housing 10 corresponding to the central separation partition 12, one side is the elastic spring ( As a ring-shaped configuration that continuously receives the pressing force of the elastic spring 40 in contact with the other side of the 40, it corresponds to a portion having a large outer diameter of the truncated key holder 30.

That is, the rear end body 32 is a ring-shaped configuration in which the other side and one side of the elastic spring 40 located on the central separation partition 12 side continuously receive the elastic force and the restoring force of the elastic spring 40.

At this time, the outer diameter of the rear end body 32 is configured to have the same or similar size as the inner diameter of the hollow 11 of the housing 10 so that the rear end body 32 may be embedded in the hollow 11 of the housing 10. The inner diameter of the rear end body 32 is configured to have a size larger than the outer diameter of the end portion of the reinforcement 100 and is configured to penetrate a portion of the end of the reinforcement 100.

In addition, one end surface of the rear end body 32 is in contact with the other end of the elastic spring 40 or the other end of the other end of the elastic spring (40) in contact with the elastic spring 40, the elastic spring The elastic force and the restoring force of 40 may be transmitted to the key holder 30.

In addition, when the reinforcing holder 14 is further provided in the central separation partition 12, the inner diameter of the rear end body 32 is configured to have a larger inner diameter than the outer diameter of the reinforcing holder 14, and a key holder ( The end portion of the reinforcing holder 14 can be inserted into the rear end body 32 when the 30 is moved toward the central separation partition 12.

In addition, the support body 33 is a portion corresponding to the middle of the key holder 30, radially spaced apart from each other, one side is fastened to the rear end body 32 and the other side is extended toward the longitudinal end of the housing 10 In the spaced space 35, the plurality of keys 20 are inserted into the space 20 so as to be movable inward and outward, respectively.

That is, the plurality of support bodies 33 form a radial shape with respect to the virtual center axis 13 formed in the longitudinal direction of the hollow 11 of the housing 10 and one side is fastened to the rear end body 32. In addition, the key 20 is inserted into the spaced space 35 formed to be spaced apart from each other (20) is configured.

In this case, the separation space 35 is configured to have a length and width equal to or similar to the length and width of the key 20, and the inside and the outside (in the state where the key 20 is embedded in the separation space 35). The virtual center axis 13 is inward and the opposite direction of the central axis 13 is outward.

In addition, the front end body 34 is a portion corresponding to the other side of the key holder 30, fastening each of the other side of the plurality of support body 33 (20), the insertion hole 51 of the closing cap 50 It is a ring-like configuration embedded in).

That is, the front end body 34 is configured to have an outer diameter smaller than the rear end body 32, so that the overall outer circumference of the key holder 30 is smaller in size from the rear end body 32 to the front end body 34. To have the shape of a truncated cone.

At this time, since the plurality of support bodies 33 are configured to be connected to the rear end body 32 on one side and the front end body 34 on the other side, the plurality of support bodies 33 become smaller from the rear end body 32 to the front end body 34. It will be apparent to form an outer diameter of size 20.

In addition, the empty space formed at the center of the ring-shaped rear end body 32, the central empty space formed by the plurality of support bodies 33, and the empty space formed at the center of the ring-shaped front end body 34 are key holders ( A reinforcing bar insertion hole 31 of 30 is formed.

In addition, the outer circumference of the key holder 30 composed of the rear end body 32, the plurality of support bodies 33, and the front end body 34 has the same inclination as the inner circumference of the insertion hole 51 of the following closing cap 50. The key holder 30 is configured to be naturally inserted into the insertion hole 51 of the closing cap 50.

In addition, the key holder 30 of the configuration is a plurality of keys 20 is supported by the rear end body 32, the plurality of support body 33 and the front end body 34 and the outer peripheral surface and the closing cap of the end portion of the reinforcement 100 Since it is possible to pressurize the inner circumferential surface of the insertion hole 51 of the plurality of 50, the plurality of keys 20 are twisted at the time of the insertion of the end portion of the reinforcement 100 relative to the hollow 11 of the housing 10, and the reinforcement 100 The effect which can prevent the fastening force of () is reduced can be implement | achieved.

In addition, the elastic spring 40 is embedded in the first hollow (11a) and the second hollow (11b), respectively, each of the pair of key holder (30) toward both ends in the longitudinal direction of the housing (10) As a pair of configurations to pressurize, the pair of key holder 30 is continuously configured to be pushed into the insertion hole 51 of the closing cap 50.

That is, the elastic spring 40 is configured to have a length in the longitudinal direction of the hollow 11 of the housing 10, a compression spring that generates a restoring force when compressed, one side is supported in contact with the partition wall and the other side is In contact with one side of the key holder 30 is configured to apply an elastic force to the key holder (30).

At this time, one side of the key holder 30 may be configured to form an elastic spring inlet groove 37 to allow the other side portion of the elastic spring 40 to be embedded.

In addition, when the other side portion of the elastic spring 10 is fastened to the elastic spring indentation groove 37 of the key holder 30 as described above, it is possible to maintain a stable connection state of the elastic spring 40 to the key holder 30. .

In addition, the elastic spring 40 is configured to have an inner diameter larger than the outer diameter of the end portion of the reinforcement 100 so that a portion of the end of the reinforcement 100 can be embedded.

In addition, the closing cap 50 is inserted into and fastened to both sides of the hollow 11 of the housing 10, respectively, a part of which is fitted into the housing 10 hollow 11 corresponding to the outside of the key holder 30, End portions of each of the pair of reinforcing bars 100 and part of the key holder 30 is inserted into the insertion hole 51 is formed, respectively, the inner circumference of the insertion hole 51 of the truncated cone-shaped As a pair of configurations configured to have a shape corresponding to the outer circumference of the key holder 30, each of the pair of key holder 30 embedded in the hollow 11 of the housing 10, the housing 10 hollow 11 ) Is maintained in the state (20), and is formed to interfere with the plurality of keys 20 so that the key 20 pressed on the closing cap 50 can press the reinforcement 100. .

That is, one of the closing cap 50 of the pair of closing cap 50 is inserted into the first hollow (11a) of the housing 10 is fastened in part, the other fixed cap is the housing 10 A part is inserted into and fastened to the second hollow 11b.

At this time, the end portion of the reinforcement 100 penetrates the end portion of the reinforcement 100 in the center of the closing cap 50, the insertion hole 51 is formed, a part of the reinforcement 100 inserted into the insertion hole 51 The outer side of the key holder 30 is configured to be positioned, the outer circumferential surface of the plurality of keys 20 provided in the key holder 30 can be fitted in contact with the inner circumferential surface of the closing cap (50).

In addition, the fastening between the closing cap 50 and the housing 10 hollow 11 may be made in a manner such as a fitting method, a screw method or a clamp method, according to the judgment of those skilled in the art, preferably of the closing cap 50 A thread is formed at a portion of the outer circumference thereof, and a screw groove corresponding to the thread of the closing cap 50 is provided at the end portion of the hollow 11 (the first hollow 11a and the second hollow 11b) of the housing 10. The structure formed can be made.

In addition, the present invention in order to facilitate the fastening between the closing cap 50 and the housing 10 is fastened in a threaded manner as described above, the other portion of the outer circumference of the closing cap 50 and the portion of the outer circumference of both ends of the housing 10 An outer periphery is formed in the form of a polygonal bolt, and a tool such as a spanner is fastened to the outer periphery of the polygonal bolt to fasten the closing cap 50 and the housing 10 by rotating the closing cap 50 or the housing 10. You can.

In addition, the insertion hole 51 formed in the closing cap 50 corresponds to the outer circumference of the key holder 30 so that the outer circumferential surfaces of the plurality of keys 20 provided in the key holder 30 are insertion holes 51. The inner circumferential surface of the truncated cone is preferably configured to have an inner circumferential surface in the form of a truncated cone so as to have a shape corresponding to the outer circumference of the truncated cone-shaped key holder 30.

At this time, the inner circumferential surface of the closing cap 50 has a smaller inner diameter at the longitudinal end side of the housing 10, and has a conical shape having a truncated cone shape having a larger inner diameter at the central separation partition 12 side.

In more detail, when the end portion of the rebar 100 is initially fastened to the coupler according to the present invention, as shown in FIG. 5A, the plurality of keys 20 provided in the key holder 30 are elastic force of the elastic spring 40. By the end has a state that is pushed in the direction to be inserted into the insertion hole 51 of the closing cap 50.

In addition, as shown in Figure 5b, when the operator inserts the end of the reinforcing bar 100 to the insertion hole 51 inlet of the closing cap 50, the end portion of the reinforcing bar 100 is inserted into the insertion hole 51 (20), The outer circumferential surface of the end portion of the reinforcement 100 and the inner circumferential surface of the plurality of keys 20 interfere with each other so that the key holder 30 having the plurality of keys 20 is separated from the center of the hollow 11 of the housing 10. While moving toward the partition wall 12, a portion of the end portion of the reinforcement 100 may be inserted into the reinforcing hole 31 of the key holder 30.

At this time, the plurality of keys 20 are moved (expanded) to the outer circumferential surface side of the following finishing cap 50 from the key holder 30 so that a part of the end of the reinforcing bar 100 is more easily inserted into the reinforcing hole 31. To be embedded. In addition, the elastic spring 40 located between one side of the key holder 30 and the central separation partition 12 in the above state is the key holder 30 toward the longitudinal end of the housing 10 which is the opposite side of the movement direction of the key holder 30. It is a state of continuous resilience to the.

Subsequently, in a state in which the worker injects the reinforcement 100 into the hollow 11 of the housing 10 until the end face of the end of the reinforcement 100 is in contact with or adjacent to the central separation partition 12, as shown in FIG. 5C, When the rebar 100 is pulled in the opposite direction, the plurality of keys 20 and the key holders 30 are hollowed by the housing 10 due to the interference between the inner circumferential surfaces of the plurality of keys 20 and the outer circumferential surfaces of the end portions of the reinforcing bars 100. Removed toward the end of the (11), at this time, the plurality of keys 20 that were moved toward the inner circumferential surface of the closing cap 50 is the reinforcement hole of the key holder 30 by the inner circumferential surface of the closing cap 50 made of a truncated cone shape (31) It is moved (reduced) toward the center again to press the outer circumferential surface of a part of the end of the reinforcement (100) to force the end portion of the reinforcement (100) to the closing cap (50) fastened to the end of the hollow (11) of the housing (10). Allow to be tightened.

In addition, the present invention is formed on the inner circumferential surface of the plurality of keys 20 has a length in the direction perpendicular to the longitudinal direction of the housing 10, is formed on the outer circumference of a portion of the end of the reinforcement 100 By interfering with the node 110 and the locking jaw 21, the fastening force of the rebar 100 by the locking jaw 21 of the key 20 may be increased.

In this case, the locking jaw 21 may be simply configured to have a predetermined height and length, or may be configured to have a predetermined pitch in the form of a thread.

That is, each of the inner circumferential surfaces of the plurality of keys 20 are formed with threaded locking jaws 21, and the locking jaws 21 formed on the respective keys 20 have the same pitch and extend to each other. The virtual extension lines connecting the plurality of locking jaws 21 formed on the plurality of keys 20 to each other may be configured to form a single thread.

In more detail, the plurality of locking jaws 21 having the above configuration generally cross each other and correspond to the plurality of nodes 110 arranged on the outer circumference of the reinforcement 100, such that the fastening of the reinforcement 100 is performed in a manner of being screwed together. It is possible to fasten with the node 110, and as a result, it is possible to increase the fastening force of the reinforcement 100 is fastened to the coupler.

In addition, as described above, the threaded locking jaw 21 formed on each of the inner circumferential surfaces of the plurality of keys 20 is inserted into the reinforcing bar 100 in the reinforcing hole 31 of the key holder 30 by mistake of an operator. In this case, since the operator can easily remove the reinforcing bar 100 from the reinforcing rod hole 31 by rotating in the direction opposite to the rotation direction of the thread of the locking jaw 21, a coupler that can be discarded or cut due to a work mistake. And it can realize the effect to be able to reuse the reinforcement (100).

In connection with the above, when the threaded engaging jaw 21 is formed on each of the inner circumferential surfaces of the plurality of keys 20 as described above, the node 110 is removed from the outer circumferential surface of the end portion of the reinforcement 100 and the The locking jaw 21 formed in the key 20 can be configured to have a thread that can be fastened correspondingly.

That is, when a separate thread is formed on the outer circumferential surface of the end portion of the reinforcement 100 as described above, and the thread is formed, the thread formed on the outer circumferential surface of the end portion of the reinforcement 100 is formed on the inner circumferential surface of the plurality of keys 20. It is possible to more easily correspond to the locking jaw 21 of the form, the fastening force between the key 20 and the reinforcing bar 100 can be stronger when the reinforcing bar 100 is fastened to the coupler; If the end portion of the reinforcement 100 is twisted into the reinforcing hole 31 of the key holder 30 due to an operator's mistake, the end portion of the reinforcement 100 may be more easily separated from the coupler. The effect can be realized.

In connection with the above, when the thread is formed on the inner circumferential surface of the plurality of keys 20 as described above, one or more protrusions toward the center of the insertion hole 51 on the inner circumferential surface of the insertion hole 51 of the closing cap 50. The pin 52 can be further provided.

That is, the protruding pins 52 are configured to prevent the rotation of the key holder 30 inserted into the insertion hole 51 of the closing cap 50, and a part of the end portion of the end of the reinforcement 100 may be a key holder ( Reinforcing hole of the end portion of the reinforcement 100 is inserted into the reinforcing hole 31 of the reinforcement hole 31 and when a part of the end of the reinforcing rod 100 is twisted into the reinforcing hole 31 by a worker's mistake. When the separation is performed at 31, the rotation of the key holder 30 due to the rotation of the rebar 100 is prevented, thereby preventing the twisting of the arrangement of the plurality of kings provided in the key holder 30. do.

In more detail, the plurality of keys 20 have a state of being embedded in the separation space 35 formed by the plurality of support bodies 33 of the key holder 30, but the worker rotates the rebar 100 ( 20) If a part of the end of the reinforcing bar 100 is inserted into the reinforcing bar hole 31 (20), the plurality of support bodies 33 are rotated and damaged and the key 20 embedded in the separation space 35 There is a fear that the twisted pin, the protruding pin 52 has a state fixed to the inner peripheral surface of the insertion hole 51 of the closing cap 50, the inner side of the protruding pin 52 is the key holder 30 or By forming an engagement with the key 20 to prevent rotation of the key holder 30, the effect of keeping the arrangement of the plurality of keys 20 constant can be realized.

In addition, when a part of the end portion of the reinforcing bar 100 is twisted into the reinforcing hole 31 by the operator's mistake, the operator may rotate the threaded locking jaw 21 formed on the inner circumferential surface of the plurality of keys 20. By rotating the reinforcing bar 100 in the opposite direction, the end portion of the reinforcing bar 100 may be removed from the reinforcing bar insertion hole 31. In this case, the protruding pins 52 may be engaged with the key holder 30 or the key 20. The key 20 is not rotated even when the rebar 100 is rotated, so that an end portion of the rebar 100 can be easily separated from the reinforcing bar 31.

In connection with the above, the protruding pin 52 is configured to protrude to the inner circumferential surface of the insertion hole 51 of the closing cap 50 in one or more numbers and may form a hook with the key holder 30 or the key 20. The support body 33a of any one or more of the plurality of support bodies 33 may be configured to have a lower height than the plurality of keys 20. The protruding pin indentation groove 36 is formed between the outer side of at least one support body 33a and a pair of keys 20 adjacent to each other to allow the protruding pin 52 to be embedded therein. 52 is formed so as to engage the sides and sides of the pair of keys 20 adjacent to each other, so that the key holder 30 does not rotate in a direction perpendicular to the longitudinal direction of the housing 10. Can be.

Specifically, each of the plurality of support bodies 33 has a configuration in which one side in the longitudinal direction is fastened to the rear end body 32 and the other in the longitudinal direction is fastened to the front end body 34. The outer side of any one or more of the support bodies 33a of 33) is configured to have a height lower than the outer periphery of the rear end body 32, respectively in the spaced spaces 35 on both sides of the one or more support bodies 33a. A protruding pin indentation groove 36 may be formed between a pair of embedded keys 20, and an inner portion of the protruding pin 52 may be inserted into the protruding pin indentation 36.

At this time, the protruding pin insertion groove 36 has a length in the longitudinal direction of the at least one support body 33a, and thus has a key holder in the insertion hole 51 of the closing cap 50 having the protruding pin 52 formed therein. The effect of allowing 30 to be easily inserted without being caught by the protruding pins 52 can be realized, and both sides of the protruding pins 52 embedded in the protruding pins 52 and the insertion hole 51 are mutually different. By allowing the side portions of the adjacent pair of keys 20 to engage with each other, the key holder 30 and the key 20 may be rotated even when the rebar 100 is rotated in a direction perpendicular to the longitudinal direction of the housing 10. The effect of preventing the rotation in the rotation direction of the reinforcing bar 100 can be realized.

The above has been described with reference to a preferred embodiment of the present invention, but is not limited to the above embodiment, the person having ordinary skill in the art to which the present invention pertains through the above embodiments without departing from the gist of the present invention Can be implemented in a variety of changes.

The present invention relates to a coupler for connecting reinforcing bar used to extend the length of the reinforcing bar when constructing a reinforced concrete structure, the key holder is embedded in the hollow of the housing for embedding a pair of reinforcing bar, the key holder is fastened to the end of the housing It is maintained in the housing hollow state by the closed cap, the key holder is provided with a plurality of keys (Key) for pressing the outer circumference of the reinforcement and the inner circumferential surface of the closing cap inserted into the insertion hole of the closing cap, a pair By pushing each of the reinforcing bars into the housing hollow and pulling back, a pair of reinforcing bars can be connected to each other by the housing.

Claims

In the coupler for connecting reinforcing bar (20) to interconnect a pair of reinforcing bars 100,

The hollow 11 is formed in the longitudinal direction, and the hollow separation 11 divides the hollow 11 into the first hollow 11a and the second hollow 11b so that the central separation partition 12 has the center of the hollow 11. A housing 10 formed in the housing 10;

Reinforcing bar holes 31 are formed in the first hollow 11a and the second hollow 11b, respectively, and the inner end portions 20 of the pair of reinforcing bars 100 are respectively embedded in the first hollow 11a and the second hollow 11b. The outer diameter of one side positioned at the center of the hollow 10 of the housing 10 is configured in the shape of a truncated cone having a larger outer diameter than the outer diameter of the other side positioned outside the hollow 11 of the housing 10. A pair of key holders 30 having a plurality of keys 20 for pressing the outer circumference of the reinforcing bar 100 embedded in the inner hole 31;

A pair of elastic springs each inserted into the first hollow 11a and the second hollow 11b, each of which presses each of the pair of key holders 30 toward both ends in the longitudinal direction of the housing 10; 40) and;

Partly inserted into both sides of the hollow 11 of the housing 10 and fastened to each other, a portion of the housing 10 corresponding to the outside of the key holder 30 is fitted into the hollow 11, and the pair of reinforcing bars 100 An insertion hole 51 is formed to respectively insert a portion of each end portion and a portion of the key holder 30, and the inner circumference of the insertion hole 51 corresponds to the outer circumference of the truncated key holder 30. Coupler for reinforcing bar connection, characterized in that it comprises a; a pair of closing cap 50 is configured to have a form.
The method of claim 1,

In the central separation partition 12,

The housing 10 is configured to further include a reinforcing holder 14 formed therein with a hollow 15 having a length in the same direction as the longitudinal direction of the hollow 11,

The hollow 15 of the reinforcing holder 14,

It is configured to have an inner diameter corresponding to the outer diameter of the end of each of the pair of reinforcing bars 100 are interconnected, each end of each of the pair of reinforcing bars 100 to both sides of the hollow 15 of the reinforcing holder 14 Coupler for reinforcing bar connections, characterized in that configured to be embedded.
The method of claim 1,

The key holder 30,

The rear end body of the ring shape is located in the hollow 11 of the housing 10 corresponding to the central separation partition 12, one side is in contact with the other side of the elastic spring 40 to receive the pressing force of the elastic spring 40 continuously (32);

Radially spaced apart from each other, one side is fastened to the rear end body 32 and the other side is extended to the longitudinal end of the housing 10, the plurality of keys 20 in the separation space 35 inside and outside, respectively A plurality of support bodies 33 to be inclined to move in a direction;

And fastening each of the other side of the plurality of support bodies 33 and having a ring-shaped front end body 34 inserted into the insertion hole 51 of the closing cap 50. Coupler for rebar connection.
The method of claim 3,

The inner circumferential surface of the plurality of keys 20 is configured to form a screw thread,

An inner circumferential surface of the insertion hole 51 of the closing cap 50 is configured to further include one or more protruding pins 52 toward the center of the insertion hole 51,

At least one of the support bodies 33a of the plurality of support bodies 33,

Is configured to have a lower height than the plurality of keys 20, the protruding pins 52 may be embedded between the outer side of the at least one support body 33a and a pair of keys 20 adjacent to each other. Protruding pin inlet groove 36 to be configured to be formed,

The protruding pins 52 are formed to engage with the sides and the sides of the pair of keys 20 adjacent to each other so that the key holder 30 does not rotate in a direction perpendicular to the longitudinal direction of the housing 10. Coupler for reinforcing bar connections, characterized in that configured to not