WO2021085833A1

WO2021085833A1 - Reinforcing bar coupler

Info

Publication number: WO2021085833A1
Application number: PCT/KR2020/012010
Authority: WO
Inventors: 이양운
Original assignee: 이양운
Priority date: 2019-10-28
Filing date: 2020-09-07
Publication date: 2021-05-06

Abstract

The present invention relates to a reinforcing bar coupler and, more specifically, to a technology relating to a reinforcing bar coupler, wherein the coupler has an improved internal structure for connecting a pair of reinforcing bars to each other, so as to increase the coupling force of the reinforcing bars and thus firmly fix the reinforcing bars, and can prevent the reinforcing bars from being separated from the coupler even when an outwardly pulling force is applied thereto. That is, the present invention comprises: a body having an insertion hole formed through the center thereof so that a reinforcing bar can be inserted therethrough; a multi-stage coupling means which is installed in the insertion hole of the body and in which a plurality of plate shaped coupling members are arranged in a shape in which the members overlap one another in a coupling-direction of the reinforcing bar and thus each of the coupling members independently fixes the reinforcing bar; and a closing cap which is coupled to the end part of the insertion hole of the body to guide the insertion of the reinforcing bar through an inlet hole and prevent the multi-stage coupling means installed therein from escaping.

Description

Rebar coupler

The present invention relates to a reinforcing bar coupler, and more specifically, by improving the internal configuration of a coupler connecting a pair of reinforcing bars to each other, it is possible to firmly fix the reinforcing bar by increasing the bonding force of the reinforcing bar. It is a technology related to a rebar coupler that can prevent separation from this coupler.

In general, various methods are used to extend the length of the reinforcing bar installed inside the concrete structure, and depending on the method, it is largely classified into overlapping joints, welding joints, and mechanical joints.

The overlapping of the reinforcing bars is a method in which the ends of the reinforcing bars are partially overlapped and then the overlapped portions are connected in a form of tying through a wire. However, the overlapping has a problem that is structurally vulnerable to load, and there is a problem that the reinforcing bar is consumed more as much as the overlapped portion.

In addition, the welding joint is a method of connecting through welding in a state where the ends of the reinforcing bars are butted. The welding joint requires an expert's work and has a problem in that it takes a lot of work time. If an unskilled person performs the joint work, there is a problem that the bonding force is deteriorated.

The mechanical joint is a method of connecting both reinforcing bars by a mechanical structure using a device such as a reinforcing bar coupler. The mechanical joint by the reinforcing bar coupler is a trend that is widely applied because the time required for work according to the joint is small and a solid coupling structure can be maintained regardless of the skill level of the operator.

In particular, since rebar plays the same role as the skeleton of a concrete structure, in order for the rebar to handle the load generated on the building smoothly, the connection part of the rebar must be strong, and the structure of the rebar coupler must also be in various forms to increase the cohesion. Technology development is taking place.

As a prior art related to this, there is a registered patent No. 10-2027135 (slip prevention one-touch reinforcing bar coupler and a reinforcing bar connection construction method using the same), a cylindrical body provided with a stop plate for restraining the lowering or rising of the reinforcing bar in the inner center; Fastening caps each installed at the inner upper end and the inner lower end of the main body and provided with a guide hole in the center of which the diameter increases from the upper end to the lower end; A plurality of fastening members are radially inserted into the interior of the fastening cap, a plurality of serration protrusions are provided on the inner circumferential surface in the vertical direction, and the outer circumferential surface is formed as an inclined surface whose diameter increases from the upper end to the lower end; A support member supporting a plurality of fastening members; Includes; an elastic member installed between the support member and the ceramic sheet member to elastically support the support member and a plurality of fastening members, and is installed in close contact with each of the upper and lower ends of the stopping plate of the main body, and supports one end of the elastic member. Giving a ceramic sheet member; A technology further including a contact member installed in the center of the stopping plate of the main body and having both ends in contact with the reinforcing bar is disclosed.

However, the prior art has a structure in which the reinforcing bar is fixed through the serration protrusion of the fastening member. Therefore, if the fastening member itself loses the coupling force, there is a problem that the rebar is separated as it is because a number of serration protrusions are opened, and some sections of the rebar are not in a structure in which the fastening member is deformed according to the shape of the rebar. There is a problem. In addition, since the coupling force is maintained by the pushing force of the elastic member in the form of a compression spring, there is a structural problem in that the coupling force is also lowered when the elasticity of the spring decreases.

As another prior art, Patent No. 10-2001399 (rebar coupler with improved assembly) accommodates a reinforcing bar inserted through the front inlet, and on the inner circumferential surface thereof, a tapered surface portion whose diameter decreases toward the inlet portion, the A pair of bodies located on the tapered surface portion and provided with a guide portion for guiding a subsequent assembly portion to the tapered surface portion, and a threaded coupling screw portion; A connection means for connecting the body by coupling with the coupling screw portion; As it is inserted into the body from the rear of each body, it is guided to the tapered surface by the guide and supported for an interview on the tapered surface, and the position can be moved in the longitudinal direction of the body. A plurality of locking pins that move toward the inlet when tensioned with the inlet and are tightened by the tapered surface to bite and fix the reinforcing bar; It is provided between the connecting means and the locking pin and includes a spring for elastically supporting the locking pin.

However, the prior art also has a structure in which the reinforcing bar is fixed by a plurality of toothed surfaces formed on one locking pin, so that when the locking pin is opened, the coupling force of the entire toothed surface is lost. In addition, there is a problem that the spring elasticity is greatly affected because it cannot give a uniform coupling force according to the shape of the reinforcing bar, and because it is a configuration that generates and maintains the coupling force by the force of the spring.

According to another prior art, Korean Patent Publication No. 10-1613419, the support ring is entangled with the locking protrusion, and the front and rear surfaces of the support ring are in close contact with the locking protrusion over almost the entire surface. Therefore, there is a problem that is unsuitable for application when the deformed reinforcing bars or reinforcing bars are connected at a vertical or inclined angle due to excessive coupling force between the locking protrusion, the support ring and the bolt member applied to the reinforcing bar.

The present invention adopts a fixing structure that is completely different from the general structure applied to the conventional rebar coupler, but the part supporting the reinforcing bar is configured to be deformed according to the shape of the reinforcing bar, so that even reinforcing bars with an uneven surface can be uniformly bonded. It is intended to provide a reinforced coupler in which the coupling structure in the longitudinal direction of the reinforcing bar is made independently of the coupling part so as to continuously maintain a solid coupling state as a whole.

In the present invention, a main body having an insertion hole formed in the center so that the reinforcing bar can be inserted into the inner side, and installed inside the insertion hole of the main body, and a plurality of connecting members formed in a plate shape are arranged in a form overlapping in the bonding direction of the reinforcing bar. , Each coupling member has a multistage coupling means for independently fixing the reinforcing bar, and is coupled to the end of the insertion hole of the main body to guide the insertion of the reinforcing bar through the inlet hole, but a finish that prevents the separation of the multistage coupling means installed inside. Cap; characterized in that it consists of.

In addition, the coupling member; A support surface portion forming a circular support surface on the rim, and a tapered shape formed inside the support surface portion so that the diameter becomes narrower toward the insertion direction, and a plurality of fastening plates are each independently formed through a cutout groove formed to a certain portion in a radial direction. It characterized in that it consists of; a fastening portion having elasticity.

In addition, the multi-stage coupling means is characterized in that a spacing ring is arranged so as to have a constant spacing of the coupling members between the coupling members.

In addition, the spacing ring is characterized in that it is formed thicker than the thickness of the coupling member.

In addition, a locking protrusion is formed inside the insertion hole of the main body so that the multiple coupling means can be supported.

In addition, the present invention is in the form of a body having an insertion hole formed in the center so that the reinforcing bar can be inserted into the inside, and a plurality of coupling members formed in a plate shape overlapping in the coupling direction of the reinforcing bar, which is installed inside the insertion hole of the body. Arranged, each coupling member is coupled to the end of the insertion hole of the main body and a multi-stage coupling means for independently fixing the reinforcing bar, and guides the insertion of the reinforcing bar through the inlet hole, but prevents the separation of the multi-stage coupling means installed therein. It consists of a closing cap; and the coupling member is; A support surface portion forming a circular support surface on the rim, and a tapered shape formed inside the support surface portion so that the diameter becomes narrower toward the insertion direction, and a plurality of fastening plates are each independently formed through a cutout groove formed to a certain portion in a radial direction. It consists of a fastening portion having elasticity; a spacing ring is arranged to have a constant spacing of the linking member between the coupling members, the spacing ring is formed thicker than the thickness of the coupling member, the insertion hole of the main body A locking protrusion is formed on the inside so that the multiple coupling means can be supported, and the spacer ring in close contact with the support surface is formed to have a contact area with the coupling member equal to or narrower than that of the support surface, so that the front and rear surfaces of the spacer ring are fastened. It is characterized in that it is formed in a structure that does not come into contact with the part so that the deformed reinforcing bar can be connected and assembled at an inclined angle by imparting elastic force to the fastening part.

It is preferable that the spacing between the spacing rings 220 is 1 mm.

In the present invention, since the coupling members of the multi-stage coupling means installed inside the main body are each independently fixed to the reinforcing bar, the coupling force can be increased as the number of coupling members increases, and the coupling force of some coupling members is reduced or lost. Even so, there is an effect that the overall bonding strength can be maintained.

In addition, since the present invention does not apply a component such as a coil spring and generates a coupling force by itself, the coupling member has an effect that a problem of reducing coupling force due to a decrease in spring elasticity does not occur.

In addition, the present invention has a structure in which the incision is formed radially up to a certain portion and is divided into a plurality of fastening plates so that each fastening plate has an independently elastic structure, so that the surface is fixed in the form most suitable for the characteristics of the uneven reinforcing bar. It can be, and there is an effect of maintaining a uniform bonding force over the entire circumference of the reinforcing bar.

In addition, the present invention is particularly useful when connecting deformed reinforcing bars at an inclination angle.

1 is an exploded perspective view showing the main configuration of a reinforcing bar coupling according to the present invention

Figure 2 is an exploded perspective view showing the configuration of a multi-stage coupling means in the reinforced coupling of the present invention

Figure 3 is a perspective view showing the coupling member of the multi-stage coupling means in the present invention

Figure 4 is a cross-sectional view showing the internal configuration of the reinforced coupling according to the present invention

Figure 5 is a cross-sectional view showing the insertion hole of the body in the reinforced coupling of the present invention

Figure 6 is a cross-sectional view showing a coupling member and a spacing ring of the multi-stage coupling means in the present invention

7 is a view showing the coupling member of the present invention from the front

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

The reinforcing bar coupler of the present invention includes a main body 100 having an insertion hole 110 formed in the center so that the reinforcing bar A can be inserted into the inner side as shown in FIG. 1, and an insertion hole of the main body 100 ( 110) It is installed inside, a plurality of coupling members 210 made of a plate shape are arranged in an overlapping form in the coupling direction of the reinforcing bar (A), each coupling member 210 is a multi-stage to independently fix the reinforcing bar (A) It is coupled to the end of the coupling means 200 and the insertion hole 110 of the main body 100 to guide the insertion of the reinforcing bar (A) through the inlet hole 310, but the multi-stage coupling means 200 installed therein It characterized in that it consists of; a closing cap 300 to prevent separation.

The main body 100 is to form the overall appearance of the reinforced coupler, and the insertion hole 110, the multi-stage coupling means 200, and the closing cap 300 are configured on both sides around the main body 100. As shown in the figure, the shape of the main body 100 is preferably made of a straight shape when the reinforcing bar (A) is connected in a straight line, but the connecting portion of the reinforcing bar (A) is at a certain angle. It goes without saying that the body 100 can be formed accordingly when it is bent.

The multi-stage coupling means 200 of the present invention is made in a form in which a plurality of independently formed plate-shaped coupling members 210 are overlapped as shown in FIG. 2. That is, one coupling member 210 does not provide a large coupling force, but the coupling force of the plurality of coupling members 210 is combined into one multistage coupling means 200 to generate a large coupling force. The coupling force of the multi-stage coupling means 200 made in this way is improved as the number of coupling members 210 increases, and since each coupling member 210 independently fixes the reinforcing bar (A), some coupling members 210 Even if the bonding force of) is decreased or lost, the overall bonding force can be maintained.

The configuration of the coupling member 210 is a support surface portion 211 forming a circular support surface on the rim as shown in FIG. 3, and the inner side of the support surface portion 211 is tapered so that the diameter decreases toward the insertion direction. Doedoe formed in a true form, a plurality of fastening plates 212b each independently having elasticity fastening portions 212 through a cut groove 212a formed to a predetermined portion in a radial direction; consists of.

The support surface portion 211 corresponds to a portion supported when the coupling member 210 is overlapped. The support surface portion 211 is preferably formed with an appropriate support area as shown in the drawing. If the area of 211) is too narrow, there is a problem that the coupling member 210 is easily deformed when a strong load occurs, and if the area of the support surface part 211 is too large, the formation range of the coupling part 212 is relatively narrow. Because of the loss, there is a problem that the bonding force with the reinforcing bar (A) is poor.

The fastening portion 212 is a portion integrally formed inside the support surface portion 211, and is formed in a shape that becomes narrower in the insertion direction, so that the reinforcing bar (A) is inserted into the insertion hole 110 of the main body 100. Insertion of the reinforcing bar (A) is possible, but when pulling the reinforcing bar (A) in the opposite direction of insertion, the reinforcing bar (A) is not separated because it reverses the deformation direction of the fastening portion 212.

In addition, the fastening part 212 has a radially cut groove 212a formed up to a certain portion and divided into a plurality of fastening plates 212b, so that each fastening plate 212b has a structure having elasticity independently. Therefore, the fastening plate 212b is in close contact with the reinforcing bar A with a strong force by its own elastic restoring force of the fastening plate 212b in a state that opens outward to fit the shape of the inserted reinforcing bar A according to the principle of the plate spring. It will be. In this way, through the structure that is closely adhered to the reinforcing bar (A), the surface can be fixed in the shape most suitable for the characteristics of the reinforcing bar (A), and uniform bonding force can be maintained throughout the circumference of the reinforcing bar (A). .

In addition, it is preferable that the multi-stage coupling means 200 of the present invention is provided with a spacing ring 220 having a constant spacing between the coupling members 210 between the coupling members 210 as shown in the drawings. The spacing ring 220 is in close contact with the support surface portion 211 of the coupling member 210, and the contact area with the coupling member 210 must be equal to or narrower than the area of the support surface portion 211. In this structure, as shown in Figs. 4 and 6, the front and rear surfaces of the spacing ring 220 do not contact the fastening part 212, so by imparting elastic force to the fastening part 212, a general circular reinforcing bar like a spiral reinforcing bar It is not easy to assemble deformed reinforcing bars.

The reason why the spacing ring 220 is disposed together with the coupling member 210 is to prevent interference problems of each coupling member 210 due to deformation of the coupling member 210 when reinforcing bar (A) is inserted, and the spacing It is to increase the coupling force between the multi-stage coupling means 200 and the body 100 by fitting the ring 220. Therefore, the thickness of the spacing ring 220 is preferably formed to be thicker than the thickness of the coupling member 210.

When the spacer ring 220 is disposed between the coupling member 210 in this way, the coupling member 210-the spacer ring 220-the coupling member 210-the spacer ring 220 )-Interval ring 220 will be in the order. In addition, as for the shape of the spacing ring 220, the spacing ring 220 in the drawing may be made in a complete circular shape as shown in the drawing, but it is of course applicable to a form in which a part of the spacing ring 220 is cut off, such as a "C".

In the present design, the spacing ring 220 in close contact with the support surface portion 211 is formed such that the contact area with the coupling member 210 is equal to or narrower than the area of the support surface portion 211, so that the front and rear surfaces of the spacing ring 220 are It is formed in a structure that does not come into contact with the fastening part 212. Therefore, it is very convenient to assemble the deformed reinforcing bar at an inclined angle by imparting elastic force to the fastening part 212.

That is, as shown in Fig. 4, since the spacing ring 220 does not contact the fastening part 212, the fastening part 212, which is an elastic piece, can further impart a deformable elastic force, which is a deformable shape such as a spiral reinforcing bar. It is useful for coupling reinforcing bars, and when the extension direction of rebars is changed vertically or when rebars are connected at a vertical or inclined angle, the elastic structure in which the spacing ring 220 and the fastening part 212 do not contact It exerts an excellent effect.

In particular, it was confirmed that a structure that can hold any shape as it is formed can be implemented by using a compact structure that combines a plate spring of about 0.2 mm and a spacing ring of about 1 mm.

In addition, a locking protrusion 120 may be formed inside the insertion hole 110 of the main body 100 of the present invention so that the multiple coupling means can be supported. More specifically, the locking protrusion 120 is a configuration in which the support surface portion 211 of the coupling member 210 located at the front end is in close contact to be supported, and the degree of protrusion of the coupling portion 212 formed on the coupling member 210 in close contact It is desirable to be formed with a certain margin in consideration of.

The closing cap 300 of the present invention is screwed to the inlet portion of the insertion hole 110 of the main body 100, while allowing the insertion of the reinforcing bar (A) through the inlet hole 310, The multi-stage coupling means 200 installed inside the main body 100 as an inner part serves to prevent separation. Therefore, one side of the multi-stage coupling means 200 is supported by the locking projection 120 of the main body 100, and the other side is supported by the inner side of the closing cap 300.

In the above, the present invention has been described with reference to the above embodiments, but it is of course possible to implement various modifications within the scope of the technical idea of the present invention.

Claims

The main body 100 having an insertion hole 110 formed in the center so that the reinforcing bar (A) can be inserted into the inside,

It is installed in the insertion hole 110 of the main body 100, a plurality of coupling members 210 made of a plate shape are arranged in an overlapping form in the coupling direction of the reinforcing bar (A), each coupling member 210 is independently Multistage coupling means 200 for fixing the reinforcing bar (A) and,

It is coupled to the end of the insertion hole 110 of the main body 100, guides the insertion of the reinforcing bar A through the inlet hole 310, but prevents the separation of the multi-stage coupling means 200 installed therein ( 300); consists of,

The coupling member 210 is;

A support surface portion 211 forming a circular support surface on the rim,

The inner side of the support surface part 211 is formed in a tapered shape so that the diameter becomes narrower toward the insertion direction, and a plurality of fastening plates 212b each independently elasticity through a cutout groove 212a formed to a certain portion in a radial direction. It is made of a fastening part 212;

A spacing ring 220 is disposed between the coupling members 210 so as to have a constant spacing between the coupling members 210,

The spacing ring 220 is formed thicker than the thickness of the coupling member 210,

A locking jaw 120 is formed inside the insertion hole 110 of the main body 100 so that the multiple coupling means can be supported.

The spacer ring 220 in close contact with the support surface part 211 is formed such that the contact area with the coupling member 210 is equal to or narrower than the area of the support surface part 211, so that the front and rear surfaces of the spacer ring 220 are fastened. Formed in a structure that does not come into contact with (212) and by imparting elastic force to the fastening portion 212, the deformed reinforcing bars are assembled at an inclination angle,

The spacing between the spacing rings 220 is 1mm, a reinforced coupler.