KR20160103870A - one-touch steel reinforcing bar coupler for concrete construction - Google Patents

Abstract

The present invention relates to a high strength one-touch reinforcing bar coupler, capable of preventing a joint unit of a connection unit from shearing off, by holding the joint unit of the connection unit when a connected reinforcing bar is tensioned, as an even holding force is relatively strongly applied to the connection unit of the reinforcing bar. According to the present invention, the high strength one-touch reinforcing bar coupler includes: a coupler main body having a guide spiral connection unit including a first guide inclination unit inclined from the inner side of a hollow unit to the outer side and formed in a spiral shape to provide a clamping force of the reinforcing bar in the circumferential direction on the inner circumference of the hollow unit, wherein the hollow unit is formed in the longitudinal direction of the coupler main body; and a clamping unit inserted into the hollow unit by being screwed to a first spiral connection unit of the coupler main body and including a clamping spiral connection unit including a first clamping inclination unit individually connected to the first guide inclination units to slide and formed on the outer circumference to provide the clamping force to the reinforcing bar by moving to the outer side when a tensile force is applied to the reinforcing bar to be connected, wherein the clamping unit also includes multiple clamping members having a holding unit comprising an insertion unit supported as the each joint unit is inserted therein and the each joint unit protrudes on the outer circumference of the reinforcing bar connected to the inner circumference in the circumferential direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a one-touch steel reinforcing bar coupler for concrete construction,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing coupler, and more particularly, to a reinforcing coupler capable of fixing the outer circumferential surface of a bar or reinforcing bar at the time of connecting reinforcing bars for building construction.

In general, concrete is a composite composition composed of cement, sand, gravel, water, etc. mixed at a suitable ratio. Although the compressive strength is comparatively high, the tensile strength is very low compared to the compressive strength and cracks tend to occur. In order to reinforce the strength of the concrete (reinforcement of the tensile strength), reinforcing bars are bound in the form in which the concrete is laid.

These conventional reinforced concrete structures are widely used in various construction and civil engineering works because they have excellent compressive and tensile strength and are able to construct various types of structures and have excellent physical properties.

Reinforcing bars used for reinforcing concrete are reinforcement bars, which are round bars and deformed bars. Circular bars mean that there are no bars on the surface of the reinforcing bars. There is a rib.

The deformed reinforcing bars are more adhesive to concrete than round reinforcing bars and have a smaller crack width when cracks occur in concrete. Generally, the reinforcing bars do not use circular reinforcing bars but use deformed reinforcing bars. The elastic modulus of this reinforcing bar is 2.4 million kg / ㎠, and the coefficient of linear expansion (linear expansion coefficient) is about 1.2 ㅧ 10-5 / ℃, which is almost the same as concrete.

These reinforcing bars are used for the construction of buildings and for the production of concrete structures for various civil engineering works. Since reinforcing bars are manufactured in standardized lengths, it is necessary to interconnect reinforcing bars of a predetermined length during the laying work.

The connecting method for connecting the reinforcing bars during the normal laying work includes a folding method, a welding method, a screwing method, and a connecting method. The folding method is a method in which wires are wound around the ends of the deformed reinforcing bars overlapped with each other to connect the reinforcing bars to each other. However, since the wires need to be wound around each deformed reinforcing bar, the work is troublesome and the bending strength And it is pointed out that the problem of safety is weak. On the other hand, the weld joint method is a method of welding the end portions of the reinforcing bars against each other, and the strength of the joint portion is good, but the work is very cumbersome and takes a long time and construction is delayed. Screwing method is a method of screwing the connecting ends of deformed bars and interconnecting them.

Considering these points, a reinforcing coupler is disclosed in Korean Patent No. 1030579 (Apr. 21, 2011). A hollow cylindrical tube having a pair of reinforcing bars formed to be symmetrical with respect to a center in the longitudinal direction so that the reinforcing bars are inserted into the reinforcing bars from the outer ends of the reinforcing bars; And a tightening spring that is coupled to the thread is installed.

Such a reinforcing coupler has a problem that each portion contacting with the tightening spring is subjected to intensive stress and sheared at the gripping portion.

In addition, a high-strength reinforcing coupler is disclosed in Korea Patent No. 1003302 (2010.12.22). The posted reinforced coupler includes a plurality of coupler housings having tapered portions and mutually coupled to each other, and a plurality of coupler locks provided inside the coupler housing and having tapered portions corresponding to the respective tapered portions.

In the conventional coupler configured as described above, since the portions of the reinforcing bars gripped by the coupler locks have a bearing capacity, the supporting force is dispersed in the holding portions and the moving displacement of the reinforcing bars is relatively large in a state where the connecting reinforcing bars are grasped have. In addition, manufacturing costs are relatively high, and many parts of the coupler are used in the field.

Korean Patent Registration No. 0977658 (Aug. 17, 2010) has posted a rod connection device. The rod connecting device includes a pair of bodies each having a cylindrical shape and facing each other and adapted to receive an object such as a rod, and a pair of bodies provided in the pair of bodies to hold the object such as the rod tightly in two or multiple stages A plurality of stoppers; A spring provided on a bottom surface of the plurality of stoppers to elastically support the plurality of stoppers in the longitudinal direction of the pair of bodies; And an elastic ring provided on the inner periphery of the plurality of stoppers to elastically support the plurality of stoppers in a radial direction of the pair of bodies.

In the conventional rod connecting device constructed as described above, since the collet type stoppers are stacked in the longitudinal direction inside the body, tightening force acts on the corresponding parts of the collets. Particularly, as described above, since the body has a complicated structure in which a plurality of stoppers are stacked in the longitudinal direction, it is difficult to manufacture and interference occurs by the stoppers when assembling the reinforcing bars for coupling. In addition, since a plurality of stoppers are stacked in the longitudinal direction, there is a problem that the displacement displacement of the reinforcing bars is severely exhibited when the combined reinforcing bars are tensioned as described above.

And a ring fixed type reinforced coupler disclosed in Korea Patent Publication No. 2014-0056009 (May 2014.05.09).

Korean Patent No. 1030579 (Apr. 21, 2011) Korean Patent Registration No. 1003302 (December 22, 2010) Patent Registration No. 0977658 (Aug. 17, 2010) Korean Patent Publication No. 2014-0056009 (2014.05.09)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a high-strength one-touch reinforcing coupler for preventing a shear from being held by gripping a joint portion of a joint portion when a connected reinforcing bar is tensioned, .

Another object of the present invention is to provide a high-strength one-touch reinforcing coupler capable of increasing the gripping force of a reinforcing bar connected by using a rotational force when connecting reinforcing bars and minimizing the amount of displacement of the reinforcing bars when the reinforcing bars are tensioned .

In order to accomplish the above object, the present invention provides a high-strength one-touch reinforcing coupler

A coupler main body having a hollow portion formed in a longitudinal direction and formed in a spiral shape to provide tightening force of a reinforcing bar in the circumferential direction on the inner circumferential surface of the hollow portion and having a first guide helical portion having a first guide inclined portion inclined from the inside to the outside of the hollow portion; ,

The first guide guide member is inserted into the hollow portion of the coupler body so as to be slidably engaged with the first guide guide member and is moved in a radial direction when the tensile force acts on the connecting reinforcing bar to provide tightening force to the reinforcing bar. And a fastening unit including a plurality of first tightening members provided on the inner circumferential surface thereof with a gripping portion for holding an outer circumferential surface of a reinforcing bar for connection to the first fastening screw engagement portion, .

In the present invention, at least one elastic support ring is provided on the outer circumferential surface of the first tightening members so as to maintain the assembled state when the coupler body is inserted.

The gripping part is formed with the inlet portions at a predetermined pitch so that the respective protruding portions of the reinforcing bars coupled to the inner circumferential surface of the first superimposed members are inserted and supported and supported.

At least one of the first tightening members is formed in a spiral shape in a circumferential direction on an inner circumferential surface of the first tightening members, and at least one of the first tightening members is provided with a predetermined And the recesses are formed at a pitch.

In order to accomplish the above object, the present invention provides a high-strength one-touch reinforcing coupler

A first guide helical connecting portion formed in a helical shape to provide a tightening force of a reinforcing bar in the circumferential direction on the inner circumferential surface of the hollow portion in the longitudinal direction and having a first guide inclined portion inclined from the central portion of the hollow portion to one outward direction, A coupler main body including a second guide helical connecting portion having a second guide inclined portion inclined from the center of the hollow portion to the outside of the other side;

The first guide guide portion is inserted into one side of the hollow portion of the coupler body so as to be slidably engaged with the first guide inclined portions and is moved in the radial direction when the tensile force is applied to the coupled rebars, A first fastening screw having a first tightening screw portion on an outer circumferential surface so as to provide fastening force and a plurality of fastening portions each having a first fastening portion formed by the first fastening portions, A first tightening unit including first tightening members;

And is inserted into one side of the hollow portion of the coupler body so as to be slidably engaged with the second guide inclined portions and moved in the radial direction when the tensile force is applied to the coupled rebars, A second fastening screw having a second fastening screw portion on the outer circumferential surface so as to provide fastening force, and a plurality of second fastening portions, each having a second fastening portion composed of first fastening portions, And a second tightening unit including tightening members.

The high-strength one-touch coupler according to the present invention can easily assemble the reinforcing bars for connection and minimizes the amount of displacement in the tensile direction that is pulled out when the tensile force acts, and can improve the productivity by a relatively simple structure . Further, the high-strength one-touch coupler according to the present invention is formed on the outer peripheral surface of the coupling portion of the reinforcing bars and can grip the protruding portions in the circumferential direction, thereby increasing the gripping force of the reinforcing bars.

FIG. 1 is an exploded perspective view of a high-strength one-touch reinforced concrete couple according to the present invention,
2 is a sectional view of the high strength one-touch reinforcing coupler shown in Fig.
3 is a cross-sectional view showing another embodiment of a high-strength one-touch reinforcing coupler according to the present invention,
4 is an exploded perspective view showing a tightening unit of a high-strength one-touch reinforcing coupler according to the present invention,
Fig. 5 is a cross-sectional view of the tightening unit shown in Fig. 4,
6 is a cross-sectional view showing another embodiment of a high-strength one-touch reinforcing coupler according to the present invention,
7 is an exploded perspective view showing another embodiment of a high strength one-touch reinforcing coupler according to the present invention,
8 is a cross-sectional view of the high-strength one-touch reinforcing coupler shown in Fig. 7,
9 and 8 are sectional views showing a state in which a protective cap is mounted on the high-strength one-touch coupler of the present invention,
11 is a cross-sectional view illustrating an operating state of a high-strength one-touch reinforcing coupler according to the present invention.

The high-strength one-touch reinforcing coupler according to the present invention interconnects reinforcing bars when the reinforcing bars are installed for construction of civil engineering works, buildings, and the like. One embodiment thereof is shown in Figs.

1 to 3, a high-strength one-touch reinforcing coupler 10 according to the present invention includes a coupler body 20 for connecting reinforcing bars 300 and 300, And a first and second tightening units 40 and 50 for providing a gripping force to a coupling portion of the reinforcing bar 300 inserted into and supported by the hollow portion of the coupler main body 20.

The coupler body 20 has a hollow portion 21 formed in the longitudinal direction thereof. A first guide helical engagement portion 23 having a first guide sloping portion 22 for providing a gripping force of a reinforcing bar is provided on an inner circumferential surface of the hollow portion 21 at one side with respect to a center portion of the coupler main body 20, And a second guide helical engagement portion 25 having a plurality of second guide sloping portions 25 for providing tightening force of a reinforcing bar is formed on the inner circumferential surface of the other hollow portion 21 of the coupler main body 20 corresponding thereto 26 are formed in a spiral shape.

The first and second guide slopes 22 and 25 formed on the first and second guide helical joints 23 and 26 formed on the inner circumferential surface of the coupler main body 20 are formed in opposite directions. The first and second guide slopes 22 and 25 are formed to have a uniform inclination angle from the inner circumferential surface to the outer circumferential surface side of the coupler main body 20. The inclination angle is set to 10 degrees with respect to the center axis of the hollow portion of the coupler body 20 To 45 < 0 > C. The first and second guide slopes 22 and 25 have a structure inclined toward the center of the hollow portion 21 in the outward direction from the inside of the coupler main body 20. That is, it has a tilted structure so as to gradually protrude from the inside to the outside.

A first support step 22a is formed in a boundary region of the first guide slopes 22 in a normal direction with respect to the center of the hollow portion 21 and a boundary portion of the second guide slopes 25 And the second support step 25a is formed in the normal direction with respect to the center of the hollow part 21. [ The first guide slope 22 and the second guide slope 25 have a spiral structure. The first guide slope 22 and the second guide slope 25 have a continuous spiral structure in the longitudinal direction.

When the first guide helical joining portion 23 and the second guide helical joining portion 26 are formed on both sides of the longitudinal center of the coupler body 20 as described above, And a stopper plate 30 integrally formed with or formed of a separate member.

The stopper plate 30 restricts the insertion length of the reinforcing bar for coupling of the reinforcing bars to be coupled. That is, the stopper plate 30 provided inside the central portion of the coupler main body 20 has two reinforcing bars 300 and 300 for engaging each of the reinforcing bars 30 and 30 of the first and second tightening units 40 and 50, 45) 55 to thereby allow the lengths of the coupling portions of the two reinforcing bars to be substantially equal to each other.

1 and 2, the stopper plate 30 may be screwed to one side of the first or second guide helical joining portions 23 and 26 to be positioned at the center of the coupler main body 20 And may be formed in a disc shape. The disc-shaped stopper plate 30 has a first or second guide helical engagement portion 23 so as to maintain a right angle with respect to the longitudinal direction of the coupling main body 20 when the stopper plate 30 is engaged with the coupling main body 20, (26). In this process, the disc-shaped stopper plate 30 is preferably partially cut away from the edge toward the center so that bending can be smoothly maintained.

The first and second guide helical joining portions 23 and 26 formed on the coupler body 20 may be formed by machining, forging, molding or the like on the inner circumferential surface of the coupler main body 20. As shown in FIG. 3, the coupler body 20 may include first and second body members 20a and 20b that are screwed to each other with reference to a center portion thereof. Also, although not shown in the drawings, the first and second body members may be screwed to the connecting member, respectively.

The coupler main body 20 is not limited to the above-described embodiment. The coupler main body 20 may be formed with only a first guide helical coupling portion having a first guide inclined portion, A first tightening unit 40 may be installed.

The first and second tightening units 40 and 50 are screwed to the first and second guide helical joining parts 23 and 26 formed on both sides of the center of the coupler body 20, By providing the holding force of the reinforcing bars 300, the first and second tightening units 40 and 50 have substantially the same construction.

1 and 2, the first tightening unit 40 includes a reinforcing bar 300 that is slidably engaged with and joined to the first guide slanting portion 22 of the first guide helical connecting portion 23, And is moved in the radial direction when the moving force is exerted to provide the tightening force to the reinforcing bar. The first tightening unit 40 has a plurality of first tightening inclined portions 41 formed on the outer circumferential surface so as to form a helix corresponding to the first guide inclining portion 22 of the first guide helical engaging portion 23, And a plurality of first tightening members 43 provided with a first gripping portion 42 for gripping an outer circumferential surface of the reinforcing bar for connection to the reinforcing bars. The first tightening members 43 are arranged in the circumferential direction so that the first tightening inclined portions 41 of the first tightening members 43 form a continuous helix in contact with the first guide inclining portion 22. [ That is, as shown in FIGS. 1 and 2, the first fastening members 43 forming the first tightening unit 40, that is, the first fastening members 43 (two to six) 43 are arranged in the circumferential direction to form a first tightening screw engagement portion 44 having a first tightening inclined portion 41 on the outer circumferential surface. The reinforcing bars are inserted into the first tightening unit 40 so that the first tightening members 43 forming the first tightening screw engagement part 44 are separated while being moved in the radial direction. Is guided along the first guide inclined portion 22 formed on the inner circumferential surface of the coupler main body 20 to maintain a circular arrangement.

 The first tightening members 43 are arranged in the circumferential direction so that the first gripping portions 42 formed on the inner circumferential surface of each first tightening member 43 are inserted into the reinforcing bar insertion portion 45 ). The first tightening members (43) are supported by elastic support rings (46) so as to be maintained in a state arranged along the circumferential direction. Support grooves 46a for preventing the elastic support ring 46 from being supported when the first tightening members 43 are released are formed on the outer circumferential surfaces of the first tightening members 43 constituting the first tightening unit 40 . The support groove 46a may be formed in the extended portion 43a extending a predetermined length from both ends of the first tightening member 43. [ However, the present invention is not limited to this, and a support groove 46a may be formed in the circumferential direction between the first tightening inclined portions 41.

1 and 2, the first tightening inclined portion 41 formed on each of the first tightening members 43 contacts the first guide inclining portion 22 and is connected to the reinforcing bars 300 And the height H1 of the first tightening inclined portion 41 is set to be greater than the height of the first guide inclining portion 22 (H2) of the first electrode (not shown). The width W1 of each of the first tightening slopes 41 is formed to be substantially equal to the width W2 of the first guide slanting portion 22. [

 The first tightening inclined portion 41 formed on the first tightening member 43 is formed in the circumferential direction or in an oblique direction with respect to the central axis of the coupler main body.

 A third supporting step 41a is formed in a boundary region of the first tightening slopes 41 in a direction normal to the center of the hollow part 21 by forming an inclination of the first tightening inclined part 41. [ The first grip portion 42 formed by the first tightening members 41 includes a first inlet portion 42a that is inserted and supported at each corner portion formed to protrude in the circumferential direction along the outer peripheral surface of the reinforcing bar, ).

However, the present invention is not limited thereto. When the first fastening members 41 are formed in two, the first protrusions 42b may be formed on the selected inner circumferential surface. That is, the first grip portion 42 is formed with the first inlet portion 42a on the inner circumferential surface of one of the first tightening members 41, and on the inner circumferential surface of the other of the first grip members 41, 1 protrusion 42b. When the first tightening unit 40 is composed of two first tightening members 41, the rib 320 protruding in the longitudinal direction of the reinforcing bar 300 and connecting the respective barbs is formed in the The bead of the reinforcing bar 300 coupled to the longitudinally inner circumferential surfaces of the first fastening member 41 is smoothly formed on the inner circumferential surfaces of the first fastening members 41. [ The guide groove 42c can be formed. 4). The spiral first protrusion 42b may be formed of a double helix or a multiple helix. However, the present invention is not limited thereto.

The second tightening unit 50 is slidably engaged with the second guide slanting part 25 of the second guide helical engaging part 26 and has a radius To provide tightening force to the reinforcing bars. The second tightening unit 50 is formed so that a plurality of second tightening inclined portions 51 are formed on the outer circumferential surface so as to form a helical line corresponding to the second guide inclining portion 25 of the second guide helical engaging portion 26, And a plurality of second tightening members 53 provided with a second grip portion 52 for gripping the outer peripheral surface of the reinforcing bar for connection to the inner side. The second fastening members 53 are arranged in the circumferential direction so that the second fastening slopes 51 of the second fastening members 53 are continuous spirals contacting the second guide slopes 25. That is, as shown in FIGS. 1 and 2, the second tightening members 53 constituting the second tightening unit 50, that is, two to six (substantially two) tightening members 53 are arranged in a circumferential direction to form a second fastening screw engagement portion 54 having a second fastening sloping portion 51 on the outer circumferential surface. As the reinforcing bars are inserted into the second tightening unit 50, the second tightening members 53 forming the second tightening helical joining portion 54 are separated while moving in the radial direction. The second tightening members 51 Is guided along the second guide inclined portion 25 formed on the inner circumferential surface of the coupler main body 20 so as to maintain the circular inclined portion 51 arranged in a circular shape.

 The second fastening members 53 are arranged in the circumferential direction so that the second grip portions 52 formed on the inner circumferential surface of each second fastening member form a reinforcing bar insertion portion 55 into which the reinforcing bar 300 for the fastening is inserted do. The second tightening members 53 are supported by the elastic support ring 56 so as to maintain a state arranged along the circumferential direction.

The second tightening inclined portion 51 formed on each of the second tightening members 53 is in contact with the second guide inclined portion 22 so as to be connected to the outer circumferential surface of the reinforcing bar 300, ) Is gradually drawn in from the inside to the outside so as to be able to move. The first tightening inclined portion formed on the second tightening member 53 is formed in the circumferential direction or in an oblique direction with respect to the central axis of the coupler main body.

 A fourth supporting step 51a is formed at a boundary of the second tightening slopes 51 in a direction normal to the center of the hollow part 21 by being inclined with respect to the second tightening slant part 51.

The second grip portion 52 formed by the second tightening members 53 has substantially the same configuration as the first grip portion. That is, the second grip portion 52 may include a second inlet portion 52a, which is formed so as to protrude in the circumferential direction along the outer circumferential surface of the reinforcing bar.

However, the present invention is not limited thereto. When the second tightening member 53 is formed by two pieces, a spiral second projection 52b may be formed on one selected inner circumferential surface. That is, in the second grip portion 52, the second inlet portion 52a is formed on the inner circumferential surface of one of the second tightening members 51, and on the inner circumferential surface of the other of the second fastening members 51, Two protrusions 52b may be formed. When the second tightening unit 50 is composed of the two first fastening members 51, the rib 320 protruding in the longitudinal direction of the reinforcing bar 300 and connecting the respective barbs, The bead of the reinforcing bars 300 coupled to the longitudinal inner circumferential surfaces of the second fastening members 531 is smoothly formed on the inner circumferential surfaces of the second fastening members 531. [ A guide groove 52c can be formed. (See Fig. 4)

5, the first tightening member 43 and the second tightening member 53 are formed of a reinforcing bar insertion portion 45 formed by the first tightening member 43 or the second tightening member 53, In order to prevent the uneven shape of the reinforcing bars 55 from being maintained in a non-circular shape, the elastic deformation groove 55 is formed on the outer circumferential surface so as to be elastically deformed or plastically deformed in the action of the gripping force of the reinforcing bars, (47) and (57) may be formed. The first and second elastic deformation grooves 47 and 57 formed in the longitudinal direction on the outer side of the first and second fastening members 43 and 53 are inserted into the first fastening members 43, The first tightening member 43 or the second tightening member 53 is provided on the side of the reinforcing bars 300 when the reinforcing bars are connected to each other by a reinforcing bar having a diameter greater than or smaller than the diameter of the reinforcing bar insertion portion 55 formed by the first tightening member 45 and the second tightening member 53, So that deformation can be smoothly performed so as to be in close contact with the outer circumferential surface.

On the other hand, the inner circumferential surfaces of the first tightening member 43 and the second tightening member 53 are not limited to those formed in a circular shape but may be formed in a polygonal shape. That is, it may vary depending on the cross-sectional shape of the reinforcing bars or connecting members to be connected (round bar, square bar, octagonal bar, hexagonal bar, etc.).

In the one-touch reinforcing coupler of high strength as described above, it is possible to prevent the collision of the first guide helical joining portion 23 formed on the inner peripheral surface of the hollow portion of the coupler main body 20 and the first fastening member 43 formed on the first tightening member 43 of the first tightening unit 40 The first fastening helical engagement portion 44 is formed to have substantially the same shape or a larger number of helical turns of the first guide helical engagement portion 23 and a second guide spiral formed on the inner peripheral surface of the hollow portion of the coupler main body 22, The prongs of the engaging portion 25 and the prongs of the second fastening helical engaging portion 55 formed on the second fastening member 53 of the second fastening unit 50 are formed substantially the same, A large number of spirals are formed. However, it is not limited thereto.

The number of the first guide inclined portion 22 and the number of the first tightening inclined portion 51 and the number of the second guide inclined portion 25 and the second tightening inclined portion 51 are made equal Thus, the gripping force acting on each portion of the joint portion of the reinforcing bar for interconnecting can be uniformly formed.

In the above embodiment, the first and second guide helical joining parts 23 and 26 formed on the coupler body and the helical threads of the first and second fastening helical joining parts 44 and 54 may be double helical or multi helical .

The first tightening unit 40 and the second tightening unit 50 are not shown between the stopper plate 30 and the first tightening unit 40 and between the stopper plate 30 and the second tightening unit 50, The first tightening members 43 of the first tightening unit 40 and the second tightening members 53 of the second tightening unit 50 are interposed between the elastic members for biasing the elastic members 50 in the outward direction, So that the reinforcing bars inserted into the reinforcing bars 45 and 55 can be smoothly inserted. The elastic member may be made of an elastic spring, an elastic rubber, or a resin having elasticity.

A compression spring 400 may be installed between the end of the reinforcing bar 300 coupled with the stopper plate 30 to elastically bias the reinforcing bars 300 coupled thereto as shown in FIG. The compression spring 400 has a spring elastic modulus capable of supporting the weight of the reinforcing bar 300.

  7 to 8, the elastic pieces 75 and 75 may be provided between the stopper plate and the ends of the reinforcing bars.

Referring to the drawings, the elastic pieces 75 and 75 are formed of a plate-like member and include elastic body portions 75a and 75a supported by the stopper plate 50, elastic bodies 75a and 75a, And elastic supporting portions 75b and 75b that protrude upward from the bottom surface of the reinforcing bar 300 to support the lower surface of the reinforcing bar 300 so that the rotation of the reinforcing bars can be smoothly performed. The ends of the reinforcing bars 75b and 75b are moved toward the stopper plate 30 by the movement of the first tightening unit 40 or the second tightening unit 50 and the lowering of the reinforcing bars 300 due to the rotation of the reinforcing bars, It is preferable that the conical deforming projection is formed so as to be deformable so as to be easily in close contact with the upper surface of the body.

The elastic supporting portion is not shown but may be formed of an elastic piece bent upward by forming the elastic body portion by beading or forming a plurality of cut portions in the radial direction from the central portion. Further, the elastic supporting portion may be formed by laminating the plate-like elastic main body portion and protruding to the upper portion. In addition, the elastic body portion is formed at its edge with engaging pieces (not shown) to be engaged with the first tightening member 43 or the second tightening member 53 to form the first assembling unit 40 or the second assembling unit 50, So that it can be inserted into the coupler main body 20.

 Meanwhile, the coupler main body may be formed in a cruciform shape depending on the application to be connected, but the present invention is not limited thereto. The coupler main body may have a T-shape, a multi-type or an elbow shape having a branch portion branched from the main body.

9 and 10, when it is necessary to connect reinforcing bars after the concrete mortar is poured, the end of the coupling body exposed from the concrete mortar is provided with protection for preventing the inflow of concrete mortar The cap 100 can be installed. The outer circumferential surface of the protective cap 100 is inclined inward toward the end side, thereby facilitating the detachment of the concrete mortar when cured. A handle (not shown) for separating the cap may be formed on the upper surface of the protective cap 100.

 The shape of the protective cap is not limited to the above-described embodiment, but may be a structure capable of preventing the concrete mortar from being introduced into the exposed coupling body.

 The operation of the high-strength one-touch coupler according to the present invention constructed as described above will be described as follows.

First, in order to interconnect the reinforcing bars using the one-touch coupler 10 according to the present invention, reinforcing bars for coupling are inserted through the hollow portion 21 at one side of the coupler main body 20. The reinforcement 300 inserted through the hollow portion 21 is inserted into the reinforcing bar inserting portion 45 of the first tightening unit 40 during the insertion of the reinforcing bar 300. In this process, The first tightening inclined portions 42 of the first tightening members 43 slide along the first guide inclining portion 22 formed on the inner circumferential surface of the coupler main body 20. In the process of inserting the reinforcement 300 for coupling as described above, the end of the reinforcing bar contacts the stopper plate 30 located at the center of the coupler main body 20, so that the insertion of the reinforcing bar 300 is restricted.

8, when the reinforcing bars 300 for connection are inserted into the first and second tightening units 40 and 50, the ends of the reinforcing bars 300 are inserted into the stopper plate 50 Is supported by the resilient supports 75b, 75b of the supported resilient piece 75 or by the compression spring 400 as shown in Fig.

One side of each of the barbs 310 protruding in the circumferential direction of the reinforcing bar inserted into the first tightening unit 40 and the second tightening unit 50 is connected to one end of the first tightening member 41 And the other side of the reinforcing bar 300 is supported by the first protrusion 42b formed on the inner surface of the other first tightening member 41 by being inserted into and supported by the first receiving portion 42a constituting the first gripping member 42 Lt; / RTI >

In this state, the first tightening member 40 and the second tightening member 50 are rotated in the tightening direction of the combined rebar 300. The first and second tightening units 40 and 50 move toward the stopper plate 30 while the reinforcing bars 300 are gripped and the elastic supporting portions 75b and 75b of the elastic pieces 75 and 75 Or the compression spring 400 is crushed or compressed.

  The first and second tightening units 40 and 50 are rotated relative to the main body 20 by rotating the first and second tightening units 40 and 50, The bonding force can be increased.

The first tightening members 43 or the second tightening members 53 are closely attached to the outer peripheral surface of the reinforcing bar 300 during the movement of the first and second tightening units 40 and 50, Since elastic deformation grooves 47 and 57 are formed in the longitudinal direction on the outer circumferential surfaces of the first tightening member 43 and the second tightening member 53, Or is plastically deformed and brought into close contact with the grip portion of the grip portion of the reinforcing bar 300, thereby increasing the gripping force of the reinforcing bar.

Particularly, as described above, in the course of grasping the reinforcing bar, each of the nods is inserted and supported in the first receiving portion 42a of the first fastening member 41. [

The reinforcing rods 300 to be connected are completed by connecting the reinforcing bars to be connected to the second tightening unit 50 through the other side of the coupler body 20 as described above.

11, when the connection of the reinforcing bars 300 is completed, when tensile force is applied to the connected reinforcing bars 300, 300, the first and second fastening slopes 41, ) 51 are supported along the first and second guide slopes 22 and 25 and the sliding force to be slid is applied to the first and second fastening members 43 and 53 in close contact with the outer peripheral surface of the reinforcing bar And each of the barbs 310 formed on one side of the outer circumferential surface of each reinforcing bar 300 is supported by the first barring portion 42a and the second barring portion 52a, 310 are hooked on the edges of the first and second inlet portions 42a, 52a to minimize the transfer in the tensioning direction.

The gripping force acting on the coupling portion of the reinforcing bars 300 and 300 by the above-described operation is obtained by forming a plurality of first and second guide slanting portions 22 and 25 on the inner circumferential surface of the hollow portion of the coupler body 20 along the longitudinal direction The first and second tightening members 43 and 53 of the first and second tightening units 40 and 50 are formed on the outer circumferential surfaces of the first and second tightening members 43 and 53, The first and second fastening members 43 and 53 and the coupler main body 20 are uniformly operated since the first and second fastening slopes 41 and 51 are formed.

 In particular, the first and second guide slopes 22 and 25 formed on the inner peripheral surface of the coupler main body 20 and the first and second fastening slopes 41 formed on the first and second fastening members 43 and 53, Since the first and second tightening members 43 and 53 are moved outwardly in the process of assembling the reinforcing bars, when the combined reinforcing bars are rotated in the tightening direction, do. Therefore, even if tensile force is applied to the combined reinforcing bars 300 and 300, displacement due to the tensile force is not generated at all.

As described above, in the high-strength one-touch reinforcing coupler according to the present invention, the reinforcing force of the reinforcing bars uniformly acts on the respective portions of the joining portion of the reinforcing bar, and the reaction force thereof can act uniformly along the longitudinal direction on the coupler body. It is possible to prevent the bonding portion of the reinforcing bar from being abnormally deformed or sheared due to the gripping force acting on the specific portion.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The high strength one-touch reinforcing coupler apparatus of the present invention is widely applicable not only to the connection of reinforcing bars at the time of installation but also to the connection of pipes, bolts, sections, rods, etc. used in various industrial facilities.

Claims (12)

A coupler main body having a hollow portion formed in a longitudinal direction thereof and having a guide helical engagement portion formed in a helical shape to provide tightening force of a reinforcing bar in the circumferential direction on the inner peripheral surface of the hollow portion and having a first guide inclined portion inclined from the inside to the outside of the hollow portion,
The first guide slopes of the coupler body are inserted into the hollow portions of the coupler body so as to be slidably engaged with the first guide slopes and are moved in the outward direction when the tensile force acts on the coupled rebars to tighten the reinforcing bars A plurality of fastening portions provided on the outer circumferential surface with a fastening screw engagement portion having a first tightening inclined portion and having a grip portion formed by protruding in the circumferential direction along the outer circumferential surface of the reinforcing bar coupled to the inner circumferential surface, And a fastening unit including the fastening unit. The method according to claim 1,
Wherein the gripping portion is formed with projections in a circumferential direction so as to grip an outer circumferential surface of a reinforcing bar coupled to at least an inner circumferential surface of the first tightening members. The method according to claim 1,
Wherein the first fastening members are supported by at least one elastic support ring on the outer circumferential surface thereof so as to maintain the assembled state when the coupler body is inserted. A first guide helical connecting portion formed in a helical shape to provide a tightening force of a reinforcing bar in the circumferential direction on the inner circumferential surface of the hollow portion in the longitudinal direction and having a first guide inclined portion inclined from the central portion of the hollow portion to one outward direction, A coupler main body including a second guide helical connecting portion having a second guide inclined portion inclined from the center of the hollow portion to the outside of the other side;
The first guide guide portion is inserted into one side of the hollow portion of the coupler body so as to be slidably engaged with the first guide inclined portions and is moved in the radial direction when the tensile force is applied to the coupled rebars, A first gripping part having a first tightening screw part having a first tightening inclined part on the outer circumferential surface so as to provide tightening force and having first inner engaging parts inserted into the inner circumferential surface along the outer circumferential surface of the reinforcing bar for connection, A first tightening unit including a plurality of first tightening members;
And is inserted into one side of the hollow portion of the coupler body so as to be slidably engaged with the second guide inclined portions and moved in the radial direction when the tensile force is applied to the coupled rebars, A second gripping portion provided with a second tightening screw engagement portion having a second tightening inclined portion on the outer circumferential surface so as to provide tightening force and having second engaging portions inserted in the circumferential direction on the outer peripheral surface of the reinforcing bar for connection to the inner circumferential surface, And a second tightening unit including a plurality of second tightening members. 5. The method of claim 4,
The first tightening unit including the first tightening members and the second tightening unit including the second tightening members may include at least one first tightening member and at least one second tightening member to hold the first tightening members and the second tightening members when the coupler body is inserted, And a resilient support ring of a high-strength one-touch reinforcing coupler. 5. The method of claim 4,
Further comprising a stopper plate which defines a coupling position of the reinforcing bars to be coupled to the coupler body at a boundary between the first guide helical engagement portion and the second guide helical engagement portion. The method according to claim 6,
And a compression spring installed between the end of the reinforcing bar and the stopper plate for elastically biasing the reinforcing bars inserted in the first tightening unit and the second tightening unit to elastically bias the reinforcing bars in the outward direction. Coupler. 5. The method of claim 4,
The first tightening member and the second tightening member are provided on the outer circumferential surface of the first tightening member and the second tightening member so that the first tightening member or the second tightening member can be brought into close contact with the outer peripheral surface of the reinforcing bar, Grooved one-touch reinforcing coupler. The method according to claim 4 or 6,
Wherein the coupler main body is divided into a first main body member having a first guide helical coupling portion and a second main body member having a second guide helical coupling portion, and the couplers are screwed together. 5. The method of claim 4,
Further comprising a protective cap coupled to both ends of the coupler body to prevent foreign matter from entering the interior of the coupler body when the concrete is poured. 5. The method of claim 4,
Further comprising a protective cap coupled to both ends of the coupler body to prevent foreign matter from entering the interior of the coupler body when the concrete is poured. 5. The method of claim 4,
The first protrusions for forming the first grip portion are formed on the inner circumferential surface of one of the first tightening members constituting the first tightening unit,
And a second projection for forming a second grip portion is formed on an inner circumferential surface of one second tightening member constituting the second tightening unit.

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