KR101602399B1 - A coupler for connecting reinforcing bar - Google Patents

Abstract

The present invention relates to an one-touch type coupler to connect reinforcement bars comprising: a pair of coupler bodies mutually coupled, having open two ends into which reinforcement bars are inserted and an inclined surface of which inner diameter gradually decreases as it reaches an entrance; a prop fixated between the coupler bodies; a coupling unit formed on the inclined surface of the coupler bodies, consisting of numerously divided unit members along the periphery thereof and capable of accommodating and coupling the reinforcement bars; insertion holes located in an inner circumferential surface of the coupling unit to maintain an inner space of the coupling unit; distance keeping units equidistantly protruding from the outside of the insertion holes as a bar shape to keep a distance between the unit members; an o-ring mounted in a groove formed along an outer circumferential surface of the coupling unit to surround the outside of the coupling unit; and a spring formed between the prop and the coupling unit to elastically pressurize the coupling unit. The coupling unit is inserted into the inclined surface of the inside of the coupler bodies while being shaped by the insertion holes, distance keeping unit and o-ring. The insertion holes and the distance keeping unit become separated from the coupling unit while an elastic pressure is applied to the spring. Then, the coupling unit moves along the inclined surface toward the entrance, thereby pressurizing the outer circumferential surface of the reinforcement bars.

Description

A coupler for connecting reinforcing bar

The present invention relates to a one-touch reinforcing coupler, and relates to a one-touch reinforcing coupler capable of firmly connecting a reinforcing bar and a reinforcing bar.

Reinforced concrete is used as an internal skeleton of concrete structures in the fields of construction and civil engineering. Since reinforcing bars are manufactured to a certain length, it is necessary to use reinforcing bars to fit the length of the structure according to the length of the structure.

Butt joints and overlap joints are often used in the joining method of reinforcing bars. Reinforced butt joints have been used to weld longitudinally and welded joints, while reinforced nodal joints have been layered with wires.

In recent years, a reinforcing coupler, which is a component for connecting reinforcing bars to each other to reduce such troubles, is being developed.

One of the conventional reinforcing couplers is disclosed in Korean Patent Laid-Open Publication No. 10-2013-0061158 (Mar.

FIG. 1 shows a conventional reinforcing coupler. FIG. 1 shows a conventional reinforcing coupler, which includes a coupling member 20 which is coupled to a receiving groove of a pair of coupling cases 10 and which is tightly fixed to an outer surface of a connecting material M, And an elastic member (30) for applying a one-directional elastic force to the member, and a support member (40) coupled between the elastic member.

The operation of the conventional reinforcing coupler will be described. A receiving groove is formed in the coupling case, and the receiving groove guides the space in which the coupling member can slide. At this time, the receiving groove is formed to be inclined so that the fastening member 20 moves in the direction of the supporting member 40 to secure the insertion space when the connecting material M is inserted, And moves to the inlet portion of the case 10 and is tightly fixed to the reinforcing bars.

However, in the conventional reinforcing coupler fixing method, since the receiving grooves must be machined so that the fastening members can be stably moved to the inside of the coupling case, there is a disadvantage in that the machining time is long, It is difficult to fix the fastening member located on the upper side.

In addition, there has been a problem that even after the connecting material is fixed to the fastening member, clearance is generated in the left and right directions.

KR 10-2013-0061158 A

SUMMARY OF THE INVENTION The present invention provides a one-touch reinforced concrete coupler for reinforcing a connection between a reinforcing bar and a coupler by a one-touch pressing of a reinforcing bar, It has its purpose.

In order to achieve the above object, the present invention provides a pair of coupler bodies which are mutually engaged, both ends of which are opened and a reinforcing bar is inserted, and an inclined surface whose inner diameter is gradually reduced toward the entrance side is formed; A support plate fixed between the inside of the coupler body; A fastening part which is provided on an inclined surface of the coupler body and is formed as a unit member divided into a plurality of parts along the circumference to receive and fasten the reinforcing bars; An insertion port which is located on an inner circumferential surface of the fastening portion and holds the internal space of the fastening portion; a space maintaining protrusion formed on the outside of the insertion opening to protrude in a bar shape at a predetermined interval to maintain a space between the unit member and the unit member; ; An O-ring that is seated in a groove formed along an outer circumferential surface of the coupling portion and surrounds the outside of the coupling portion; And a spring which is provided between the support plate and the coupling portion and elastically presses the coupling portion, wherein the coupling portion is inserted into the inner inclined surface of the coupler body while maintaining one shape by the insertion port, the gap retaining hole and the O- The inserting hole and the gap retaining hole are separated from the coupling portion by inserting the reinforcing bars, and at the same time, an elastic pressing force is applied to the spring so that the coupling portion is moved to the entrance side along the inclined surface, thereby pressing the outer peripheral surface of the reinforcing bar.

The fastening portion is characterized in that the inner peripheral surface thereof is formed with a tooth profile which is in close contact with the outer periphery of the reinforcing bar.

The insertion port is characterized in that an arc-shaped groove is formed in each of the outer side surfaces between the gap holding holes to eliminate interference with the coupling portion.

According to the present invention having the above-described configuration, the following effects can be expected.

When the reinforcing bars are inserted into the inside of the coupler body to push the spacing holder, the fastened portions held in shape by the spacing holder are elastically pressed toward the inlet side of the coupler body by the spring and are fastened to the reinforcing bars. It can be combined with one-touch method.

Since the spring is biased in one direction, the clearance of the reinforcing bars coupled to the coupler body is reduced and can be firmly coupled.

1 is an exemplary view of a conventional reinforcing coupler;
2 is a structural view of a one-touch reinforcing coupler according to an embodiment of the present invention;
3 is a sectional view taken along line AA 'of FIG. 2;
Fig. 4 is an example of a state of a fastening part. Fig.
FIG. 5 is an internal structural view showing a combination of a one-touch reinforcing coupler and a reinforcing bar according to an embodiment of the present invention; FIG.
Figure 6 is another exemplary cross-sectional view of the insertion port of Figure 3;

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of an inner structure of a one-touch reinforcing coupler according to an embodiment of the present invention.

Referring to FIG. 2, the one-touch reinforcing coupler according to the present invention includes the coupler bodies 100a and 100b, the support plate 200, the coupling unit 300, the insertion port 420, the gap maintaining member 440, An O-ring 500 and a spring 600.

The coupler bodies 100a and 100b correspond to the outer casing of the present invention and both ends thereof are opened to insert the reinforcing bars into the interior.

The coupler bodies 100a and 100b are coupled to each other so that the coupler bodies 100a and 100b are fastened to each other. The left and right coupler bodies 100a and 100b are threaded on the opposite sides of the coupler bodies 100a and 100b, do.

Each of the coupler bodies 100a and 100b is formed with an inclined surface whose inner diameter gradually decreases gradually toward the inlet side where the reinforcing bars are introduced into the coupler bodies 100a and 100b.

The plunger plate 200 is fixed between the inner sides of the coupler bodies 100a and 100b to define the range of the inflow of the reinforcing bars, 600).

The support plate 200 is positioned between the coupler bodies 100a and 100b and can be held in a fixed state by fastening the coupler body.

The fastening part 300 is a main part that can receive the reinforcing bars inserted into the coupler bodies 100a and 100b and fasten them by an adhesive force.

The coupling part 300 is formed at a position corresponding to the inside of the coupler body, that is, the inclined surface, and is formed as a unit member divided into a plurality of parts along the circumference, so that the reinforcing bars can be received and fastened.

Here, the fastening part 300 is formed with a groove 340 on which the O-ring is seated along an outer circumferential surface, and a tooth 320 protruding from the outer circumference of the reinforcing bar is formed on the inner circumferential surface.

The fastening portion 300 is formed of a plurality of unit members, and the insertion port 420, the gap retaining hole 440 (FIG. 3), and the O-ring 500 are required to maintain one shape.

The insertion port 420 is inserted at an end portion of the coupling portion to be positioned inside and secures an internal space of the coupling portion 300.

3) is positioned between the unit member and the unit member of the fastening portion to maintain the gap between the unit members, thereby maintaining the overall shape of the fastening portion, which will be described below.

The O-ring 500 surrounds the outer side of the coupling portion, thereby preventing the divided unit members from being separated from the outside.

An insertion port 420 is provided on the inside of the coupling part 300 and a gap maintaining hole 440 is provided between the unit parts of the coupling part 300. An O- 500 so as to be inserted into the inner inclined surface of the coupler body.

In this case, the inner inclined surface of the coupler body becomes a shape in which the diameter decreases toward the entrance side, so that the set is sprung and pressed by the spring 600 to be inserted to a certain portion.

The spring (600) is elastically supported with respect to the receiving portion to provide a resilient pressure to the coupling portion (300).

In the present invention, the spring 600 is formed in the form of a coil spring to closely contact the end of the coupling part 300 to provide elastic pressure to the coupling part 300.

The spring 600 is provided between the support plate 200 and the fastening part 300 to elastically press the fastening part 300.

 When the reinforcing bars are inserted from the inlet side of the coupler body to press the insertion port, the insertion port is detached from the coupling part, and also the gap holding part protruding from the insertion port that maintains the shape of the coupling part is also detached, .

At this time, the spring 600 moves the coupling portion to the inlet side along the inclined surface of the coupler body by elastic pressure, so that the inner diameter according to the inclined surface is reduced so that each unit member of the coupling portion can be pressed onto the outer peripheral surface of the reinforcing bar .

The elastic pressure action of the spring 600 will be described later with reference to FIG.

3 is a cross-sectional view taken along line A-A 'of FIG.

3, the insertion port 420 is positioned on the inner circumferential surface of the coupling part 300 to maintain the internal space of the coupling part 300 to maintain the minimum inner diameter of the coupling part 300, And a spacing holder 440 formed outside the unit member 300a at predetermined intervals to maintain a gap between the unit member 300a and the unit member 300a.

The gap holding tool 440 is formed in a bar shape which is formed to be long along the longitudinal direction at a certain angle along the outer circumferential surface of the insertion port 420. In the present invention, And four unit members 300a of the fastening part 300 are installed between the first and second fastening parts 440.

The spacing holes 440 are formed in a number corresponding to the unit member 300a, and two or more spacing holes are sufficient, and three to four spacers are suitable.

Fig. 4 is an exemplary view of a fastening part. Fig.

Fig. 4 (a) is a state in which the inner diameter of the fastening part is enlarged by the insertion port and the gap retaining hole, and Fig. 4 (b) is a state in which the inner diameter of the fastening part is reduced due to disengagement of the insertion port and the gap retaining hole.

4 (a), the unit members 300a are spaced from each other when the insertion port 420 and the gap holder 440 are coupled to each other. In FIG. 4 (b) As the insertion port 420 and the spacing holder 440 are separated by the fastening part 300, both sides of the unit members 300a are closely contacted with each other and can be brought into close contact with the outer peripheral surface of the reinforcing bar.

5 is an internal structural view showing a combination of a one-touch reinforcing coupler and a reinforcing bar according to an embodiment of the present invention.

5, when the reinforcing bar 10 is inserted into the inlet of the coupler body 100a and passes through the inside of the fastening part 300, when the insertion part 420 is further inserted, the fastening part 300 is tightly pressed, .

At this time, when the insertion port maintaining the shape of the fastening part 300 and the gap maintaining hole are separated from the reinforcing bar by pressure, the fastening part 300 is moved to the entrance side along the inclined surface of the coupler body by the elastic pressure of the spring 600 . Since the inner cross-sectional area is reduced toward the inlet side, the unit member of the coupling part 300 is finally tightened while tightly attaching to the outer peripheral surface of the reinforcing bar.

Since the elastic force is applied by the spring 600 to the fastening part 300, the change of the position of the fastening part 300 is reduced, and the clearance of the reinforcing bars fixed to the fastening part can be minimized.

FIG. 6 is another exemplary sectional view of the insertion port of FIG. 3;

In FIG. 3, the insertion port 420 is formed in a cylindrical shape. In FIG. 6, the insertion port 420 is formed with an arc-shaped groove 422 on each of the outer sides between the spacing holders 440, So that insertion of the insertion port 420 and insertion of the reinforcing bar into the fastening part are facilitated.

As described above, the present invention provides a one-touch reinforcing coupler as a basic technical idea, and within the scope of the basic idea of the present invention, Of course, it is possible to modify it.

100a, 100b: Coupler body 200:
300: fastening part 320: tooth profile
340: groove 420:
440: space maintaining hole 500: o-ring 600: spring

Claims (3)

A pair of coupler bodies each having an inclined surface which is opened at both ends to insert a reinforcing bar and has an inner diameter gradually reduced toward the entrance side;
A support plate fixed between the inside of the coupler body;
A fastening part which is provided on an inclined surface of the coupler body and is formed as a unit member divided into a plurality of parts along the circumference to receive and fasten the reinforcing bars;
An insertion port which is located on an inner circumferential surface of the coupling portion and holds the inner space of the coupling portion;
A spacing protrusion formed outside the insertion port in a bar shape at regular intervals to maintain a gap between the unit member and the unit member;
An O-ring that is seated in a groove formed along an outer circumferential surface of the coupling portion and surrounds the outside of the coupling portion; And
And a spring which is provided between the receiving plate and the fastening part to elastically press the fastening part,
Wherein the fastening portion is inserted into the inner inclined surface of the coupler body while maintaining one shape by the insertion port, the gap retaining hole and the O-ring, and the insertion hole and the gap retaining hole are separated from the fastening portion by insertion of the reinforcing bar, Wherein an elastic pressing force is applied to move the fastening portion along an inclined surface to the inlet side, thereby pressing the outer peripheral surface of the reinforcing bar. The method according to claim 1,
In the fastening portion,
And a toothed protrusion which is in close contact with the outer periphery of the reinforcing bar is protruded from the inner circumferential surface. The method according to claim 1,
The insertion port
Wherein an arc-shaped groove is formed in each of the outer side surfaces between the spacing grooves to eliminate interference with the fastening portions.

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