KR20040037652A - Apparatus for connecting reinforcing bars by just one step - Google Patents

Abstract

PURPOSE: A one-touch type reinforcement coupler is provided to reduce working hours and to improve the constructability. CONSTITUTION: The one-touch type reinforcement coupler contains: two pairs of inner couplers(60) housing two deformed reinforcing bars(55) and moving to the semi-diameter direction at the appointed interval; a pair of intermediate couplers(70) coupled to the outside of two inner couplers(60) to limit the movement of the inner coupler(60); two outer couplers(80) overlapped to the outside of the intermediate couplers(70) to be slidable to move the inner coupler(60) to the inner or outer semi-diameter direction; and a spring(91) interposed between the outer couplers(80) to slide the outer coupler(80) outward automatically. If the outer coupler(80) is sliding to face each other against the elastic force by the spring(91), the inner coupler(60) moves to the outer semi-diameter direction to make the deformed reinforcing bar(55) house in the inner coupler(60), and if the outer coupler(80) slides to be more distant by the elastic force by the spring(91), the inner coupler(60) moves to the inner semi-diameter direction to be engaged with the deformed reinforcing bar(55) firmly.

Description

One-touch Rebar Joint {APPARATUS FOR CONNECTING REINFORCING BARS BY JUST ONE STEP}

The present invention relates to a reinforcing bar connection device, and more particularly, by forming a separate deformed reinforcing bar with a one-touch mechanical joint structure instead of overlapping joints, strengthening the tensile strength of the reinforcing joints and reducing the number of work steps. The present invention relates to a one-touch rebar joint device that can be improved and can be operated reliably even when the thermal deformation of the joint device is severe.

Reinforced concrete is a combined structure of reinforcing steel and concrete. In general, reinforced concrete bears compressive force and reinforcing steel bears tensile force. In the reinforced concrete structure, formwork is installed and concrete is poured into it to construct one-piece construction. In the construction process, the reinforcing bars must be connected to each other with a certain length as needed, and joints are naturally generated between the reinforcing bars and the reinforcing bars. . In the joint portion formed between the reinforcing bars and the reinforcing bar is a predetermined tensile force generated during the curing process of concrete. In order to sufficiently cope with such a tensile force, a close connection state between the bars must be maintained, and methods such as overlapping joints or pressure welding are generally applied thereto.

Overlap joint is a method of reinforcing reinforcing bars and reinforcing bars over the length of the required joint and placing them in a binding line. This has the advantage of easy reinforcement work, but when the diameter of the reinforcing bar is large, the stress concentration of the reinforcing bar is not matched by the eccentricity, and there is a problem in structural strength. It is not easy to pour and there is a problem that it is difficult to maintain the reinforcement spacing and the minimum coating thickness of the concrete.

Reinforcing bars by pressing is a method of integrally forming the ends by heating and pressing after the bars and the ends of the reinforcing bars. Such welding is not easy to apply because there are many problems such as long working time, excessive cost and risk of fire.

In order to solve the problems caused in the reinforcing bar joint method by the overlap joint and pressure welding, a conventional bar joint method has been used to mechanically combine the reinforcing bar and the reinforcing bar.

1 is an exploded perspective view showing an example of a conventional reinforcing bar fittings, Figure 2 is a cross-sectional view of the coupling of the conventional reinforcing bar shown in FIG.

As shown, a conventional rebar fitting consists of a coupler 10 and a nut 6 fastened to both sides thereof. Coupler 10 has a cylindrical structure as a whole, it is divided into a central body portion 1 and the locking portion (2) located at both ends thereof.

The inner circumferential surface of the body portion 1 is formed with a female screw 3 to which the reinforcing bars 11 are fastened, thereby screwing the threaded portion 7 formed at the end of the reinforcing bar 11 to the female screw 3 so as to provide two reinforcing bars 11. ) Can be connected to each other.

The inner diameter d1 of the locking part 2 is larger than the inner diameter d2 of the body part 1, and becomes thinner and taper toward the end, and the nut 10 is formed on the outer circumferential surface thereof. The male screw 4 in which the screw is screwed is formed. In addition, a plurality of cutout grooves 5 are formed in the circumferential surface of the locking part 2 along the longitudinal direction thereof so as to be tightened in the inner diameter direction when the nut 10 is fastened.

Looking at the reinforcing bar using the conventional reinforcing bar fittings, first begins by cutting the end of each of the reinforcing bars 11 to form a screw portion 7 of a predetermined diameter. When the threaded portion 7 is formed on each of the reinforcing bars 11, the two reinforcing bars 11 are aligned in a line such that the threaded portions 7 face each other, and then the reinforcing bars are inwardly turned on both sides of the coupler 10. While fitting, each screw 7 is fastened to the female screw 3 inside the coupler 10. Subsequently, when the nut 10 is fastened and tightened to the male screw 4 on the surface of the locking portion 2, the inner diameter of the locking portion 2 contracts and the nodes 8 and the ribs 9 on the surface of the rebar 11 are compressed. The two reinforcing bars 11 are to be connected to each other.

However, such conventional reinforcing bar fittings have to form a screw part by cutting the end of the reinforcing bar, so that the number of processes for reinforcing bars increases not only to reduce work efficiency, but also the structure thereof is complicated and not easy to manufacture.

In addition, in the conventional reinforcing bar fittings, the cross section of the reinforcing bar is reduced due to the formation of a threaded portion at each end of the reinforcing bar, and thus the tensile strength of the reinforcing bar is reduced, so that the reinforcement of the reinforcing bar is caused by the tensile force generated in the curing process of the concrete. There was a problem that the end is broken.

In order to solve this problem, the following one-touch rebar joints have been developed.

3 is an exploded perspective view showing the configuration of a conventional one-touch rebar connection device, Figure 4 is a perspective view showing a coupling state of the conventional one-touch rebar connection device of FIG.

Conventional one-touch rebar joint device, as shown in the hollow inner coupler 20 is open on both sides so that the two deformed reinforcement (55) is inserted opposite to each other, and sliding on both sides of the outer surface of the inner coupler (20) It consists of a coupling structure of two external couplers 30, possibly overlapping. The outer coupler 30 is fitted in both directions of the inner coupler 20 so that the outer coupler 30 is slidably coupled to the circumferential surface of the inner coupler 20.

The inner coupler 20 has a plurality of through-holes 21 spaced at regular intervals on its circumferential surface, and the same number of grooves corresponding to each of the through-holes 21 on the inner circumferential surface of the outer coupler 30. (31) is formed. A spherical ball 25 is provided between each of the through holes 21 and the grooves 31, and the through holes 21 have a tapered structure narrowing in the inner diameter direction of the inner coupler 20. Consists of the ball 25 is not passed through the through-hole 21 to maintain a state in which the protruding part in the inner diameter direction of the inner coupler 20.

In the center of the inner coupler 20 is formed a ridge 22 which is raised outward along the circumferential surface, and the ridge 22 is a mortar hole penetrated in the inner diameter direction of the inner coupler 20 ( 23) is formed. When the reinforcing bar connected by the reinforcing bar device according to the present invention is embedded in the concrete, mortar of concrete is naturally injected into the inner coupler 20 through the mortar hole 23 to the end of the reinforcing bar 55 Wrapped so that the reinforcement 55 is more firmly connected.

In addition, both ends of the inner coupler 20 is formed with a separation preventing wall 24 for preventing the separation of the outer coupler 30, the inner peripheral surface side of the outer coupler 30 of the ridge 22 A stepped stepped part 32 is formed to face each side, and an elastic spring 40 is provided between the stepped part 32 and the ridge 22 to provide a predetermined elasticity.

In the case of the one-touch rebar connection device as described above, construction time and cost can be reduced, and by injecting mortar through the mortar hole, the tensile strength of the reinforcing bar portion can be greatly improved.

There is a need to develop a more convenient and robust reinforcing bar connection device while taking advantage of the one-touch reinforcing bar connection device.

Accordingly, the present invention was developed to solve the problems of the conventional reinforcing bar fittings as described above, by reducing the number of steps when the reinforcing bars by forming a mechanical joint structure that automatically connects the reinforcing bars and reinforcement by a simple operation It is an object of the present invention to provide a one-touch rebar joint device that is simple in structure and easy to use so that time can be shortened and construction property can be improved therefrom.

Another object of the present invention is to provide a reinforcing bar joint apparatus to provide a more stable reinforcing bar joint state by removing the cause of lowering the tensile strength of the reinforcing bar end in the reinforcing bar.

Still another object of the present invention is to provide a reinforcing bar connection device having a robust structure that can be less affected by the function of the device even when deformation occurs in the reinforcing bar connection device due to heat deformation or other external force.

1 is an exploded perspective view showing an example of a conventional reinforcing bar connection device.

Figure 2 is a cross-sectional view of the conventional reinforcing bar joint shown in FIG.

Figure 3 is an exploded perspective view of a conventional one-touch rebar joint device.

Figure 4 is a perspective view of the combined state of the conventional one-touch rebar joint according to FIG.

5 is an exploded perspective view of a one-touch rebar joint device according to the present invention.

Figure 6 is a perspective view of the reinforcing bar coupling device according to FIG.

Figure 7 is a cross-sectional view of a state where the reinforcing bar is inserted into the one-touch rebar joint according to the present invention.

8 is a cross-sectional view showing a state in which the connection of the reinforcing bar is completed by the insertion of the deformed reinforcing bar in the one-touch rebar joint according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Coupler Torso 2: Lock

3: female thread 4: male thread

5: incision groove 6: nut

7: threaded portion 8: node

9: rib 10: coupler

20: internal coupler 21: through hole

22: ridge 23: mortar ball

24: Breakaway barrier 25: Ball

30: external coupler 31: groove

32: step 40: spring

55: steel bar 56: bar

60: internal coupler 61: protrusion

62: node accommodating groove 63: intermediate ring spring receiving groove

70: external coupler 71: through hole

72: ridge 73: fixing ring accommodation groove

80: external coupler 81: projection receiving groove

90: retaining ring 91: spring

92: middle ring spring

An object of the present invention as described above, the two pairs of inner couplers each receiving two deformed reinforcement bars which are inserted opposite to each other and can move a predetermined interval in the radial direction; A pair of intermediate couplers coupled to outer surfaces of the two pairs of inner couplers to limit a distance in which the inner couplers move in a radial direction of the outside; Two outer couplers slidably overlapping the outer surfaces of the pair of intermediate couplers to move the inner couplers radially inward or outward by sliding; And a spring disposed between the two outer couplers to automatically slide the outer coupler to the outside; When the outer coupler is slid in a direction facing each other against the elastic force by the spring, the inner coupler is moved radially outward so that the deformed rebar can be accommodated in the inner coupler, the outer coupler is separated from each other by the elastic force of the spring Sliding in the direction is achieved by providing a one-touch rebar joint device characterized in that the inner coupler is moved radially inward to be firmly engaged with the deformed rebar.

In the embodiment of the present invention as described above, the outer coupler is provided with a projection in the radial direction, the intermediate coupler has a through hole corresponding to the projection, the projection is inserted into the through hole It is preferable that the relative movement in the radial direction is possible and the relative movement is limited in the longitudinal direction by the projection engaging the through-hole.

Herein, the intermediate coupler has a ridge formed at a central portion thereof, and fixed ring accommodation grooves are formed at both ends thereof, such that the external coupler slides on the intermediate coupler by a fixed ring accommodated in the fixed ring accommodation groove and the ridge. It is desirable for the displacement to be limited.

Here, the outer coupler is formed with a projection receiving groove on the inner surface, when the outer coupler is slid to the ridge of the middle coupler, the projection is received through the through hole to the projection receiving groove, paired It is preferable that the distance between the inner coupler is far enough so that the deformed rebar can be accommodated into the inner coupler.

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

5 is an exploded perspective view showing the configuration of the one-touch rebar joint according to the present invention, Figure 6 is a perspective view showing a coupling state of the one-touch rebar joint according to the present invention.

As shown in Figure 5, the one-touch rebar joint device 50 of the present invention is a pair of intermediate couplers 70, which can accommodate two deformed reinforcement bars 55 are inserted opposite to each other, the pair of Two pairs of internal couplers 60 capable of firmly fixing the deformed reinforcement 55 in the interior of the intermediate coupler 70, and slidably coupled to an outer surface of the intermediate coupler 70 so as to couple the interior of the pair. Coupler 60 is composed of two external couplers (80) to make it possible to adjust the diameter of the paired inner coupler (60) to fix or move the deformed reinforcement (55), respectively.

The outer surface of the inner coupler 60 is provided with a projection 61 extending vertically to the outside, the inner surface is formed with a node receiving groove 62 corresponding to the node 56 of the deformed reinforcing bar 55, In addition, the inner ring spring receiving groove 63 is formed. The inner coupler 60 is formed in two pairs to accommodate the deformed reinforcing bar 55, and two pairs of inner couplers 60 are positioned inside the pair of the middle couplers 70. An intermediate ring spring 92 is interposed between the pair of inner couplers 60. The intermediate ring spring 92 is made a little larger than the diameter of the deformed reinforcing bar 55 in the state that does not cause deformation, it is easy to insert the deformed reinforcing bar 55 by securing a space between the inner coupler (60) It plays a role. In the present invention, the intermediate ring spring receiving groove 63 and the intermediate ring spring 92 can be omitted.

Through-holes 71 corresponding to the projections 61 are formed in the intermediate coupler 70, and ridges 72 are formed at the center thereof, and fixing ring receiving grooves 73 are formed at both ends thereof. .

The inner surface of the outer coupler 80 is formed with a projection receiving groove 81 corresponding to the projection (61). When the end portion of the protrusion 61 is rounded, it is possible to smoothly escape when it is accommodated in the protrusion accommodating groove 81 and then exits.

As shown in Figure 5, the assembly sequence of the one-touch rebar joint according to the present invention is as follows. First, two pairs of inner couplers 60 are coupled to each other, and the intermediate coupler 70 is coupled to surround the inner coupler 60 such that the protrusions 61 are accommodated in the protrusion receiving grooves 71. Next, the outer coupler 80 is coupled to one end from both ends of the coupled intermediate coupler 70 so as to surround the intermediate coupler 70, and the spring 91 and the outer coupler 80 are coupled to the other end. After the outer coupler 80 is coupled from both ends, the fixing ring 90 is coupled to the fixing ring receiving groove 73 of the intermediate coupler 70 so that the outer coupler 80 is not separated out. The coupling is completed is shown in FIG.

Next, the operation principle of the one-touch rebar connection device according to the present invention.

7 is a cross-sectional view showing a state in which the spring 91 of the central portion of the one-touch rebar joint device 50 according to the present invention is compressed to allow the release reinforcing bar 55 to be inserted.

As shown in FIG. 7, when the outer coupler 80 is slid to the ridge 72 against the elastic force of the spring 91, the protrusion receiving groove 81 of the outer coupler 80 is moved. Since the position and the position of the protrusion 61 of the inner coupler 60 coincide with each other, the protrusion 61 of the inner coupler 60 passes through the through-hole 71 of the intermediate coupler 70 to the outside. It can be accommodated in the projection receiving groove 81 of the coupler (80). Accordingly, the inner coupler 60 is radially outwardly displaced by a predetermined distance, thereby increasing the size of the inner cross-section of the inner coupler 60, so that the reinforcing bar can be easily inserted into the inner coupler pair.

8 is a cross-sectional view of the state in which the springs 91 are restored to the center portions of the one-touch rebar joint device 50 according to the present invention, and then the springs 91 at the center are restored to be firmly connected to each other. Is shown.

As illustrated in FIG. 8, when the external coupler 80 slides in a direction spaced apart from the ridge 72 by the restoring force of the spring 91, the protrusion receiving groove of the external coupler 80 ( The protrusion 61 of the inner coupler 60 located at 81 is pushed out of the protrusion accommodating groove 81, and the pair of inner couplers 60 are displaced radially inward to the inside. The size of the inner section of the coupler 60 is reduced. At this time, the node accommodating groove 62 and the node 56 of the deformed bar are in close contact with each other, and the rib of the deformed bar 55 is fixed to the gap between the pair of inner couplers 60, and the inserted deformed bar ( 55) can be securely fixed.

The ridge 72 serves as a jaw to prevent the outer coupler 80 from passing through the central portion when the outer coupler 80 slides on the intermediate coupler 70.

The node accommodating groove 62 has a shape corresponding to the curvature of the node 56 of the deformed reinforcement 55, and the corner portion has a gentle angle change, and the inner coupler is inserted when the deformed reinforcement 55 is inserted. 60 allows for smooth movement in the radial direction within the intermediate coupler 70.

When using the one-touch rebar joint device 50 according to the present invention, holding the rebar joint device 50 with one hand, compressing the spring 91 to the outer coupler 80 is the ridge 72 After sliding so far, the rebar is inserted into the reinforcing bar 50 by the other hand. Restoring the spring again after the release reinforcing bar 55 is inserted, the pair of internal couplers 60 support the release reinforcing bar 55 in close contact with each other in the up and down directions, and support the release reinforcing bar 55 in both directions. When combined, the joint between the deformed bars 55 is completed.

Although the above description has been made based on the embodiments illustrated in the drawings, the present invention is not limited thereto and can be modified and used in various forms.

As described above, according to the present invention, by simply pulling the external coupler to face each other, inserting the reinforcing bar, and by the simple operation of releasing the pulled state, the node on the surface of the deformed reinforcing bar and the node on the inner surface of the inner coupler. By providing a one-touch joint structure that comes into close contact and automatically switches to a locked state, it reduces the number of processes during rebar joint, thereby reducing work time, improving workability, and securing construction reliability.

In addition, it is possible to provide a more stable reinforcing bar joint state as a robust structure that can prevent the ball is lost due to heat deformation, such as the use of the reinforcing bar joint.

In the above, certain preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. .

Claims (4)

Two pairs of internal couplers 60 each receiving two deformed reinforcing bars 55 inserted opposite to each other and movable in a predetermined distance in the radial direction; A pair of intermediate couplers 70 coupled to an outer surface of the two pairs of inner couplers 60 to limit a distance in which the inner couplers 60 move radially outward; Two outer couplers 80 slidably overlapping the outer surfaces of the pair of intermediate couplers 70 to move the inner couplers 80 radially inward or outward by sliding; And A coupling structure including a spring 91 disposed between the two outer couplers 80 to automatically slide the outer coupler 80 to the outside; When the outer coupler 80 is slid in a direction facing each other against the elastic force by the spring 91, the inner coupler 60 is moved radially outward to accommodate the deformed reinforcement 55 in the inner coupler 60. When the outer coupler 80 is slid away from each other by the elastic force of the spring 91, the inner coupler 60 is moved radially inward to be firmly engaged with the deformed reinforcement 55. One-touch rebar joint device. According to claim 1, Outside the inner coupler 60 is provided with a projection (61) in the radial direction, The intermediate coupler 70 is formed with a through hole 71 corresponding to the projection (61) The projection 61 is inserted into the through hole 71 to allow relative movement in the radial direction, and the relative movement is limited by the projection 61 engaging the through hole 71 in the longitudinal direction. One-touch rebar joint device characterized in that. 3. The intermediate coupler (70) is provided with a ridge (72) at its center portion, and a fixed ring receiving groove (73) is formed at both ends of the intermediate coupler (70). The one-touch reinforcing bar connection device, characterized in that the displacement of the outer coupler (80) sliding on the intermediate coupler 70 is limited by the fixing ring (90) and the raised portion (72) accommodated in the. According to claim 1 or 2, wherein the outer coupler 80 is formed with a projection receiving groove 81 on the inner surface, the outer coupler 80 is the ridge 72 of the middle coupler 70 central portion Sliding up to) the projection 61 is received through the through hole 71 as the projection receiving groove 81, the distance between the pair of the inner coupler 60 is far apart and the deformed reinforcement (55) is One-touch rebar joint device characterized in that it can be accommodated in the inner coupler (60).