KR101890375B1 - Concrete rebar couplers - Google Patents

Abstract

A concrete rebar coupler according to the present invention comprises: one pair of coupler bodies including inlets, which are respectively formed in the upper end portion and the lower end portion thereof such that a rebar is inserted through the inlets, and hollow parts having tapered parts formed such that the inner diameter is gradually increased from the inlets towards the opposite sides at least partially; a plurality of piece elements installed such that the outer surfaces thereof are connected to the tapered parts inside the hollow parts of the respective coupler bodies, and having a plurality of locking protrusions disposed on the inner surface thereof so as to be held and supported by the joint or outer circumferential surface of the rebar; fracture holders having separation parts, which are installed at one side of the piece elements so as to come into contact with the ends of the rebar inserted into the coupler body and thus to be pressed, and piece element coupling parts, which are disposed at uniform intervals on the edge portions of the separation parts in the circumferential direction and to which the end portions of the respective piece elements are inserted so as to be coupled thereto; an elastic member installed at one side of the fracture holder so as to apply elastic force to one end of the piece element coupling part; a socket disposed between the one pair of coupler bodies so as to connect the one pair of coupler bodies to each other, having a pressing member insertion hole, which is penetratingly formed in the center part of the cylindrical body part in the longitudinal direction, one pair of snap ring accommodation holes, which are formed to be dented in the inner circumferential surface of the body part and spaced apart from each other at a predetermined interval, and each end for supporting one end of the elastic member; snap rings inserted and accommodated in the snap ring accommodation holes; partition members inserted and accommodated so as to be supported by the snap rings outside the snap rings; and a pressing member inserted and accommodated in the pressing member insertion hole.

Description

CONCRETE REBAR COUPLERS

The present invention relates to a concrete reinforcing bar coupler, and more particularly, to a concrete reinforcing bar coupler wherein a plurality of teeth formed with sawtooth-shaped protrusions are held at predetermined intervals by a fracture holder, and when a reinforcing bar is inserted into a casing of a coupler, To a concrete reinforcing bar coupler which is capable of fixing a reinforcing bar with a strong force by being automatically disengaged by the elastic force of a spring while the center of the breaking holder is cut off.

Conventionally, in order to connect reinforcing bars for use in concrete structures in various construction sites, reinforcing bars are conventionally bundled and fixed in a double layer structure. However, in this reinforcing bar fixing method, an operator has to wire the reinforcing bars around the reinforcing bars a plurality of times The work is troublesome and the center of the reinforcing bar is not vertical and is not straight, but the strength of the wire is weak, so that it is easily broken and the connection state is released.

In order to solve these problems, reinforcing bars (coupling devices) have been developed and used for easily and firmly connecting reinforcing bars by means other than wires.

However, most of the conventional reinforcing bars are structured by inserting the reinforcing bars into the housing and then screwing the housing into the housing, which is complicated in structure and difficult to connect the reinforcing bars. there is a problem.

In order to solve such a problem, Korean Registered Patent No. 0439305 (registered on June 28, 2004), Korean Registered Patent No. 0462291 (registered on December 2004), Korea Registered Patent No. 1003302, One-touch type reinforcing couplers are disclosed.

However, the conventional one-touch type reinforcing couplers are required to maintain a widened state when the reinforcing bars are inserted, but it is difficult to maintain the predetermined position due to the elastic force of the spring disposed at the lower portion of the fitting. And there is a problem that the verticality of the reinforcing bar is not accurately displayed.

Conventionally, there has been used a method of forming a guide member between the assemblies to maintain the position of the assembled body or to form a receiving groove capable of maintaining its position while inserting a member into the inner surface of the coupler body. However, There is a problem in that an initial slip phenomenon occurs when the tensile force is applied to the reinforcing bars as the guide member interferes with the assembled body and the reinforcing bars escape. When the receiving groove is formed in the coupler body, It has been difficult to form the magnetic recording medium in an accurate size and shape.

In order to solve such a problem, a one-touch type reinforced coupler according to the Korean Patent Registration No. 1654145 (registered on August 31, 2013) and No. 1654150 (Aug.

In the registered patents filed and registered by the applicant of the present invention, before the rebar is inserted into the coupler body, the assemblies are engaged with the coupling part of the peripheral part of the rupture holder before the rupture is inserted, and when the rebar is inserted, As the separating part at the center of the holder is cut off and separated from the coupling part, the respective coupling parts are separated from each other. Therefore, when the member moves due to the elastic force of the spring, the outer surface of the reinforcing bar is strongly pressed, So as to solve the above problems.

However, in the case of the above-mentioned registered patents, the member strongly presses the outer surface of the reinforcing bar to firmly fix the reinforcing bar. However, when the excessive force is applied to the reinforcing bar due to the elastic force of the simple spring between the fitting and the reinforcing bar, The problem of not being able to completely eliminate the initial slip phenomenon may still exist.

KR 10-1654145 B1 KR 10-1654150 B1

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a concrete reinforcing bar coupler which can prevent an initial slip phenomenon by providing an increased pressing force through additional pressing between a brace and a reinforcing bar in addition to the elasticity of a spring .

According to an aspect of the present invention, there is provided a concrete reinforcing bar coupler having an inlet through which a reinforcing bar is inserted into an upper end portion and a lower end portion, respectively, and a tapered portion having an inner diameter gradually increasing from the inlet toward the opposite side, A pair of coupler bodies each having a hollow portion formed therein, an outer side surface provided inside the hollow portion of each of the coupler bodies so as to be in continuous contact with the tapered portion, and a plurality of locking portions A separator which is disposed on one side of the coupling body and is in contact with and presses the end of the reinforcing bar inserted into the coupler body and a plurality of projections arranged at regular intervals along the circumferential direction And an end portion of each of the elongated bodies is inserted and joined, An elastic member provided on one side of the rupture holder to apply an elastic force to one end of the coupling unit; a pair of coupling members disposed between the pair of coupling members to connect the pair of coupling members to each other; A pair of snap ring receiving holes spaced apart from each other by a predetermined distance are formed in the inner circumferential surface of the body portion, the ends of the snap ring receiving holes having a socket for supporting one end of the elastic member, A snap ring to be inserted into the snap ring receiving hole, a partition member inserted and received in the snap ring to be supported by the snap ring, and a pressing member inserted and received in the pressing member insertion hole.

When the reinforcement inserted through the inlet of the coupler body presses the separating portion of the breaker holder, the separating portion is separated from the plate-engaging portion and is brought into contact with the partition wall member, and the plurality of plates are pressed by the elastic member, The locking protrusions of the fixture are primarily pressed on the outer circumferential surface of the reinforcing bar, and when the pressing member is inserted and received through the pressing member insertion hole, the pressing member presses the snap ring, the partition member, And the reinforcing bars are moved in the direction of the inlet of the coupler body so that the plurality of assemblies are inclined to the tapered portion so that the locking protrusions crush the joints of the reinforcing bars contacted by the pressing force, So that a secondary additional coupling force is generated and initial slip can be prevented.

The snap ring receiving holes may be spaced apart from the center by a predetermined distance so as to be smaller than the length of the pressing member insertion hole.

The pressing member insertion holes may be formed in the intermediate portion of the body portion so as to be opposed to each other along the longitudinal direction.

The pressing member may be inserted and accommodated in the pair of pressing member insertion holes so that their respective ends are positioned.

The pressing member may be provided in a tapered shape such that at least a part thereof becomes narrower toward the front end.

The socket may have a first male threaded portion and a second male threaded portion formed on an inner circumferential surface of one end of each of the coupler bodies at both ends of the body portion and screwed to the female threaded portion.

As described above, according to the concrete reinforcing coupler of the present invention, before the reinforcing bars are inserted into the coupler body, the assemblies are engaged with the plate fitting portions of the periphery of the rupture holder and remain open. When the reinforcing bars are inserted, As the part is separated from the coupling part due to cutting, each of the coupling parts is separated from each other, so that the member is moved by the elastic force of the spring, and the outer surface of the reinforcing bar is strongly pressed, , The pressing member is further inserted into the pressing member insertion hole of the socket again so that the partition member pushes the reinforcing bars in the direction opposite to the insertion direction and the locking projections of the fittings are forcibly moved along the tapered portions, Secondary mutual coupling provides an advantageous effect of preventing initial slip have.

1 is an exploded perspective view of a concrete reinforcing coupler according to an embodiment of the present invention,
Fig. 2 is a vertical sectional view of the concavity assembled state of the concrete reinforcing coupler shown in Fig. 1. Fig.
FIG. 3 is a longitudinal sectional view showing a state where a reinforcing bar is inserted into both ends of the concrete reinforcing coupler shown in FIG. 2. FIG.
4 is a vertical cross-sectional view illustrating a state in which an initial slip is removed by coupling a pressing member to a concrete reinforcing coupler to which a reinforcing bar is connected,
Figure 5 is a cross-sectional view of the socket of the concrete reinforcing coupler shown in Figure 1;

Specific details for carrying out the invention are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various other forms, and it should be understood that the present embodiment is intended to be illustrative only and is not intended to be exhaustive or to limit the invention to the precise form disclosed, To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout the specification. Embodiments described herein will be described with reference to an ideal exploded perspective view, an assembled perspective view, and a sectional view of the present invention.

Hereinafter, a concrete reinforcing coupler according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings with reference to FIGS. 1 to 5. FIG.

FIG. 1 is an exploded perspective view of a concrete reinforcing bar coupler according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the concrete reinforcing bar coupler shown in FIG. 1, and FIG. 4 is a longitudinal sectional view showing a state in which a pressing member is coupled to a concrete reinforcing coupler to which a reinforcing bar is connected and an initial slip is removed, and FIG. 5 is a cross- 1 is a cross-sectional view of a socket of a concrete reinforcing coupler shown in Fig. 1; Fig.

1 to 5, a concrete reinforcing bar coupler according to an embodiment of the present invention includes a pair of coupler bodies 10 and 10a in the form of a cylindrical tube, A pair of fixtures 20, a fracture holder 30, an elastic member 40, a snap ring 60, and a stopper 60, which are provided inside the coupler body 10 and are configured to securely hold the reinforcing bars B inserted into the coupler body 10, A partition wall member 70, a socket 50, a pressing member 80, and the like.

The coupler body 10 is made of a rigid metal material and has an inlet 11a through which the reinforcing bar B is inserted at one end and at least a part of the coupler body 10 from the opposite side of the inlet 11a toward the inlet 11a And a hollow portion 11 in which a tapered portion 12 gradually decreases in inner diameter is formed. The other coupler body 10a having a symmetrical shape is connected to one end of the opposite end of the one end of the coupler body 10 through which the inlet 11a of the coupler body 10 is formed via the socket 50 to form a pair of coupler bodies 10, 10a, the two reinforcing bars B can be connected to each other.

A threaded female screw portion 13 is formed on the inner peripheral surface of the end of the coupler body 10, 10a into which the socket 50 is inserted.

The fixture 20 and the fracture holder 30, the elastic member 40, the snap ring 60, and the partition wall 70 formed inside the pair of the coupler bodies 10 and 10a are formed on the basis of the socket 50 The coupler body 10 disposed on the upper side, the bracket 20 formed on the inside thereof, the rupture holder 30, the elastic member 40, and the coupler body 10 An embodiment of the structure and operation of the reinforcing coupler of the present invention including the socket 50 that engages with the retaining ring 60, the retaining ring 60, the partition member 70, and the urging member 80 will be described.

The plurality of fixtures 20 are provided in the hollow portion 11 of the coupler body 10 and the outer surface of the fixture 20 is curved so that the tapered portion 12 of the coupler body 10, As shown in FIG. The fixtures 20 have the same shape and their lower ends are coupled to the fixture engaging portions 32 of the fracture holder 30 to maintain a constant interval. When the reinforcement B is not inserted into the coupler body 10, the fixtures 20 maintain a predetermined gap between the reinforcement bars 20 and the reinforcement B while the reinforcing bars B are spaced apart from the inlet 11a of the coupler body 10 The locking protrusions 21 on the inner side surface of the body 20 are pressed against the upper surface of the reinforcing bar B by the elastic member 40, So that the reinforcing bars B are firmly fixed in the primary direction.

A plurality of locking protrusions 21 are formed on the inner surface of the fixture 20 so as to be supported by the nodule P of the reinforcing bar B. The locking protrusions 21 are arranged at a constant pitch along the axial direction of the coupler body 10 and are provided with a ratchet so as to resist the tensile force applied from the node P of the reinforcing bar B and to prevent the reinforcing bar B from falling. It is preferable to have a saw tooth shape. The locking protrusions 21 are preferably formed at a pitch of 1 占 0.05 mm, but may be changed according to the standard of the reinforcing bars.

A coupling protrusion 22 having a size and shape corresponding to the coupling groove 34 formed in the plate coupling part 32 of the fracture holder 30 is formed at the lower end of the fixture 20 so as to protrude downward The lower end of the body 20 is fixed to the coupling part 32 by fitting the coupling protrusion 22 into the coupling groove 34 almost tightly.

The fracture holder 30 is made of synthetic resin such as plastic. The breaker holder 30 is installed under the fixture 20 and supports the fixtures 20 at regular intervals while the reinforcing bars B are not inserted into the coupler body 10 at an initial interval. After the insertion of the elastic body 40, the central body pressed against the end portion of the reinforcing bar B and the peripheral portion coupled with the body 20 are separated from each other, It works.

The breaking holder 30 includes a separating portion 31 which is pressed against the lower end of the reinforcing bar B inserted into the coupler body 10 and a peripheral portion A coupling part 32 which is arranged at predetermined intervals and is inserted into and engaged with a coupling groove 34 formed in the coupling protrusion 22 which is the lower end of each of the coupling bodies 20, And a breaking portion (not shown) that connects the edge portion and the coupling portion 32 and is cut when the separating portion 31 is pressed downward by the lower end of the reinforcing bar B.

The detailed structure of the breaking portion (not shown) is described in Korea Patent Registration No. 1654145 (registered on Aug. 30, 2016).

The coupling part 32 of the breaker holder 30 is a part for fixing and supporting the lower end of the body 20 and includes an arc-shaped coupling groove 34 to which the lower end of the body 20 is fitted while being fitted, Like shape, and each of the plate-form coupling portions 32 is separated from each other. Therefore, when the breakable portion (not shown) connecting the body coupling portion 32 and the separation portion 31 is cut, each of the plate coupling portions 32 is completely separated from each other and becomes independent.

The lower end of the coupling part 32 comes into contact with the upper end of the elastic member 40 and receives the elastic force of the elastic member 40.

A circular through hole (35) may be formed in the center of the separating part (31) so that the coupler is immersed in the anti-corrosive oil, and the anti-corrosive oil can be taken out when it is taken out.

The elastic member 40 is provided between the socket 50 and the coupling part 32 of the break holder 30 and is connected to the coupling part 32 and the coupling 20, So that the assembled body 20 is brought into close contact with the tapered portion 12 of the coupler body 10 by pushing the assembled bodies 20 toward the inlet 11a. The elastic member 40 may be a compression coil spring or the like as in this embodiment, but may also be constructed using a high-elasticity plate spring.

5, the socket 50 is formed with a first male thread portion (not shown) which is helically engaged with the female thread portion 13 of each of the coupler bodies 10, 10a on the outer peripheral surfaces of both ends of the substantially cylindrical body portion 51 54 and a second male threaded portion 55 are formed. Accordingly, the female threaded portion 13 at the end of the coupler body 10 or 10a is fitted to the first male threaded portion 54 or the second male threaded portion 55 of the socket 50, The coupler bodies 10 and 10a are coupled to the socket 50 by the helical coupling between the female threaded portion 13 and the first male threaded portion 54 or the second male threaded portion 55, So that the coupler bodies 10 and 10a can be connected to each other via the socket 50. Both ends of the socket (50) support one end of the elastic member (40).

A pair of pressing member insertion holes 52 are formed in the intermediate portion of the body portion 51 of the socket 50 so as to face each other along the longitudinal direction. A pair of snap ring receiving holes 53 spaced from the center by a predetermined distance are formed so as to be smaller than the length of the insertion hole 52.

The snap ring 60 is inserted into the snap ring receiving hole 53 and inserted into the snap ring 60 so as to be supported by the snap ring 60 to the outside of the snap ring 60.

The partition member 70 includes a separating portion 31 separated from the break holder 30 while being supported by the retaining ring 60 and an end portion of the reinforcing bar B so as to limit the insertion position of the reinforcing bar B . In this embodiment, the disk-shaped support plate is used as the partition member 70, but it is needless to say that the partition member 70 can be modified into any other appropriate supporting means and shape.

The pressing member 80 is inserted and received such that the ends of the pressing member 80 are positioned in the pair of pressing member insertion holes 52 after the reinforcing bars B are inserted. The pushing member 52 is provided in a tapered pentagonal plate at least a part of which becomes narrower toward the front end. The end of the pushing member 52 is narrower than the separation distance of the two snap ring receiving holes 53, ) Is provided to ensure the convenience of insertion.

The snap ring 60 and the partition member 70 are pushed in the respective inlet directions 10a of the coupler bodies 10 and 10a by the pressurization by the insertion of the pressure member 80. [ The reinforcing bars B which are firstly inserted so as to be limited in the insertion position of the coupler bodies 10 and 10a are also pushed by the tapered portions 12 of the inclined coupler bodies 10 and 10a in the inlet direction 10a A strong second secondary addition is made while the locking protrusion 21 of the bracket 20 is pinched so that the nodule P is crushed on the outer circumferential surface of the reinforcing bar B, so that the initial slip is removed.

The concrete reinforcing coupler according to an embodiment of the present invention configured as described above functions as follows.

2, before the reinforcement B is inserted into the coupler body 10, the snap ring 60 is inserted into the snap ring holding hole 62 and is engaged with the snap ring receiving hole 53 And is inserted into contact with the outside of each snap ring 60 of the partition member 70. The lower ends of the assemblies 20 disposed inside the coupler body 10 are engaged with the assembling parts 32 of the breaker holder 30 so that the respective assemblies 20 are spaced apart from each other in the circumferential direction It remains open. At this time, the engaging projections 22 at the lower end of the body 20 are inserted into the engaging grooves 34 of the plate-like engaging portion 32 so as to be fitted tightly.

3, when the reinforcing bar B is inserted into the hollow portion 11 through the inlet 11a formed at the upper end portion of the coupler body 10, And then descends.

The lower end of the reinforcing bar B inserted into the coupler body 10 contacts the separating portion 31 of the breaker holder 30 to press the separating portion 31. At this time, The separating portion 31 is moved to the side of the socket 50 while the breakage portion 33 is cut off because the elastic coupling member 32 is supported by the elastic member 40 while receiving strong elastic force toward the inlet 11a, And is supported by the snap ring 70 while being in contact with the snap ring 70. The plate coupling portions 32 and the plate body 20 are elastically pressed toward the inlet 11a by the elastic force of the elastic member 40 so that the respective plate assemblies 32 20 are pressed against and brought into close contact with the inner surface of the tapered portion 12, the fittings 20 are disengaged. Thus, the inner surface of the braid 20 is strongly pressed primarily on the outer surface of the reinforcing bar (B).

The separating portion 31 and the end portion of the reinforcing bar B separated from the coupling portion 32 by the reinforcing bar B come into contact with the partition wall member 70 received in the socket 50, And is stopped without moving any more.

When a force is applied to the reinforcing bar B in the axial direction of the coupler body 10 in a state where the reinforcing bars B are inserted into the coupler body 10 and the reinforcing bars B are inserted to force the reinforcing bars B to separate the reinforcing bars B, The nip P of the reinforcing bar B is pressed against the locking protrusion 21 of the fixture 20 and presses the fixture 20 upward. At this time, the tapered portion 12 becomes narrower toward the inlet 11a The braid bodies 20 act as a wedge and are tightly restrained inside the coupler body 10 without detaching the reinforcing bars B. [ However, initial slip may occur during the restraint process.

4, when the pressing member 80 is inserted and received through the pressing member insertion hole 52 by using a hammer or the like, the pressing member 80 is inserted into the snap ring receiving hole 53, The separating portion 31 and the reinforcing bar b are pushed up horizontally in the inlet direction by a distance d1 from the initial insertion position, respectively. As a result, the knurl P of the reinforcing bar B is crushed by the strong pressing force of the locking protrusion 21 of the bracket 20 and the reinforcing bar b is tilted by a distance d2 to the tapered portion 12, So that a stronger coupling force is generated in the secondary and an initial slip is removed because the movement is performed by the distance d1 at which the initial slip can occur.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10, 10a: Coupler body 11: Hollow part
11a: inlet 12: tapered portion
20: coupling 21: locking projection
22: engaging projection 30: rupture holder
31: separator 32:
34: coupling groove 40: elastic member
50: Socket 51: Body part
52: pressing member insertion hole 53: snap ring receiving hole
54, 55: first and second male threads
60: Retaining ring 62: Retaining ring Retaining ring
70: partition wall member 80: pressing member
B: reinforcing bar P:

Claims (7)

A pair of coupler bodies each having an inlet through which reinforcing bars are inserted into the upper and lower ends, respectively, and a hollow portion having a tapered portion gradually increasing in diameter from the inlet toward the opposite side,
A plurality of fixtures each having an outer surface on an inner side of a hollow portion of each of the coupler bodies and connected to the tapered portion and having a plurality of locking protrusions,
A separator disposed at one side of the coupling body and pressed against the end of the reinforcing bar inserted into the coupler body, and a plurality of spacers arranged at predetermined intervals along the circumferential direction at the edge of the separator, A fracture holder including a coupling part to be coupled to the coupling part,
An elastic member provided on one side of the breaking holder and applying an elastic force to one end of the coupling part,
And the pair of coupler bodies are disposed between the pair of coupler bodies to connect the pair of coupler bodies to each other. A pressing member insertion hole is formed in the middle portion of the cylindrical body portion along the longitudinal direction, A pair of snap ring receiving holes spaced apart from the center by a predetermined distance so as to be smaller than the length of the retaining hole and having ends each having a socket for supporting one end of the elastic member,
A snap ring inserted and received in the snap ring receiving hole,
A partition member inserted and received to be supported by the snap ring outside the snap ring,
A pressing member inserted and received in the pressing member insertion hole;
/ RTI >
When the reinforcement inserted through the inlet of the coupler body presses the separating portion of the breaker holder, the separating portion is separated from the plate-engaging portion and is brought into contact with the partition wall member, and the plurality of plates are pressed by the elastic member, And the locking protrusions of the fixture are primarily pressed onto the outer peripheral surface of the reinforcing bar,
Wherein when the pressing member is inserted and received through the pressing member insertion hole, the pressing member moves the snap ring, the partition member, the separating portion, and the reinforcing bar in the direction of the inlet of the coupler body, The locking protrusion crushes the bar of the reinforcing bar, which is brought into contact with the pressing bar by the inclined movement of the shoulder, and is engaged with the outer circumferential surface while digging the outer circumferential surface, so that the secondary additional engaging force is generated to prevent the initial slip
Concrete reinforcing coupler. delete delete The method of claim 1,
The pressing member insertion hole
A pair of through holes are formed in the intermediate portion of the body portion so as to face each other along the longitudinal direction,
Concrete reinforcing coupler. 5. The method of claim 4,
The pressing member
And the pair of pressing member insertion holes are inserted and received such that their respective ends are positioned
Concrete reinforcing coupler. 5. The method of claim 4,
The pressing member is provided in a tapered shape such that at least a part thereof becomes narrower toward the front end
Concrete reinforcing coupler. The method of claim 1,
The socket
And a first male screw portion and a second female screw portion are formed on the outer circumferential surfaces at both ends of the body portion, the first male screw portion and the second male screw portion being provided on the inner circumferential surface of one end of each of the coupler bodies
Concrete reinforcing coupler.

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