KR20200101625A - Connecting coupler of one-touch type for reinforced steel bar - Google Patents

Abstract

The present invention relates to a one-touch coupled for rebar connection, which comprises: a socket (20) having first and second screw threads (22, 26) formed on one side and the other side, respectively; a first body (32) of a cylindrical structure having the other part coupled to the first screw thread (22); a second body (36) of a cylindrical structure having the other part coupled to the second screw thread (26); a first elastic body (42) having one part in contact with one part of the socket (20); a second elastic body (46) having one part in contact with the other part of the socket (20); first pressing pieces (12) divided into a plurality of pieces, having a first locking end (13) formed on the inner surface of each of the pieces, and having each one part in contact with the other part of the first elastic body (42) and each outer surface in contact with the inner surface of a first body (12), and disposed in an annular form; second pressing pieces (16) divided into a plurality of pieces, having a second locking end (17) formed on the inner surface of each of the pieces, and having each one part in contact with the other part of the second elastic body (42) and each outer surface in contact with the inner surface of a second body (16), and disposed in an annular form; a first operable body (52) having an outer surface part in contact with the inner surface of each of the first pressing pieces (12) disposed in an annular form; and a second operable body (56) having an outer surface part in contact with the inner surface of each of the second pressing pieces (16) disposed in an annular form. On the outer surface of the other part of each of the first and second pressing pieces (12, 16), first and second grooves (14, 16) perpendicular to a longitudinal direction of each of the first and second pressing pieces (12, 16) are formed. Accordingly, a tensile force acting on an end of a rebar can be evenly distributed through the outer surface of pressing pieces.

Description

Connecting coupler of one-touch type for reinforced steel bar}

The present invention relates to a coupler that connects adjacent reinforcing bars to each other, and more specifically, to increase the clamping force between the body of the coupler and the pressing piece, and at the same time, the tensile force acting on the end of the reinforcing bar is uniform through the outer surface of the other side of the pressing piece It is to provide a coupler for connecting reinforcing bars of a one-touch method that can be distributed widely.

Reinforcing bars supplied to construction or civil engineering sites are standardized and manufactured to a certain length in consideration of the convenience of transportation, and these rebars are connected to each other at the site. Conventionally, the connection of the reinforcing bars was performed using a method of tying the ends of the reinforcing bars with wires in a state where the ends of the reinforcing bars are overlapped with each other, but in this case, there are many problems such as cumbersome work and the connection portion of the reinforcing bars is not vertical.

To this end, in the related industry, the end of the reinforcing bar on each of the left and right bodies 10 in a state in which the body 10 with the pressure piece 20 and the elastic body 40 inserted therein is coupled to the left and right of the socket 50 as shown in FIG. When inserted through, the outer surface of the pressing piece is in close contact with the inner surface of the body 10 and at the same time, a coupler having a structure in which the end of each reinforcing bar is caught and fixed to the inner surface of the pressing piece 20 has been developed and is being widely used.

However, in order for the one-touch coupler of this structure to properly fix the reinforcing bar, the outer surface of the pressing piece must closely adhere to the inner surface of the body, such as errors occurring in the processing and angular deviations in the bonding process of the pressing piece and the body. As a result, there is a problem in that the bonding force between the end portion of the reinforcing bar and the inner surface of the pressing piece decreases in the process of attaching the rebar to the coupler.

Due to this, the tensile force acting on the end of the reinforcing bar is not uniformly transmitted to the body through the outer surface of the pressing piece, and as can be seen in FIG. 5B, it is concentrated in the shearing portion of the pressing piece (left portion in FIG. 5B) and the pressing piece is severely damaged or It is a potential factor that threatens the structural stability of buildings as it leads to the phenomenon that the pressurization piece escapes from the body.

Korean Patent Registration No. 1036591

The present invention has been proposed to improve the problems of the prior art, and an object of the present invention is to provide a one-touch coupler capable of uniformly distributing the tensile force acting on the end of the reinforcing bar through the outer surface of the pressing piece.

The present invention is a first of a cylindrical structure in which the first and second screw threads 22 and 26 are formed on one side and the other side, respectively, and the other side is coupled to the first screw thread 22 in order to achieve this object. The body 32, the second body 36 having a cylindrical structure in which the other part is coupled to the second screw thread 46, the first elastic body 42 in contact with one part of the socket 20, and one part The second elastic body 46 in contact with the other side of the socket 20 is separated into a plurality of pieces, but a first engaging end 13 is formed on each inner surface so that each one side is in contact with the other side of the first elastic body 42 Each outer surface is in contact with the inner surface of the first body 12 and consists of a first pressing piece 12 arranged in an annular shape, and a plurality of pieces are separated, but a second engaging end 17 is formed on each inner surface, so that each one part is A second pressing piece 16 in contact with the other side of the second elastic body 46, each outer surface in contact with the inner surface of the second body 16 and arranged in an annular shape, and a first pressing piece 12 in which the outer surface is arranged in an annular shape. ) As a one-touch coupler for reinforcing bar connection including a first movable body 52 in contact with each inner surface, and a second movable body 56 in contact with the inner surface of each of the second pressing pieces 16 arranged in an annular shape on the outer surface thereof, On the outer surface of the other side of each of the first and second pressing pieces 12 and 16, first and second grooves 14 and 18 perpendicular to the longitudinal direction of each of the first and second pressing pieces 12 and 16 are formed. It is characterized by its technical features.

Each of the first and second grooves (14, 18) is made of a plurality of formed spaced apart from each other by a predetermined interval, each of the plurality of first and second grooves (14, 18) are each of the first and second pressing pieces (12, 16) ) The width can be formed gradually wider from each other to one side.

The outer surface of the other side of each of the first and second pressing pieces 12 and 16 is inclined downward by a certain angle θ1 with respect to the virtual horizontal line extending from the outer surface of one side of each of the first and second pressing pieces 12 and 16 Become; The inner surface of the other side of each of the first and second bodies 32 and 36 in contact with the outer surface of the other side of each of the first and second pressing pieces 12 and 16 Each of the first and second bodies 32 and 36 in contact with the outer surface of one side may have an angle smaller than θ1 with respect to the virtual horizontal line extending from the inner surface of each side and may be formed to be inclined downward by a predetermined angle θ2.

In the present invention, in fixing the end of the reinforcing bar with the pressing piece, by forming the inclination angle of the inner surface of the other side of the first and second pressing pieces smaller than the inclination angle of the inner surface of the other side of each of the first and second bodies, the end portion of the reinforcing bar is It makes it possible to achieve a very strong bond with the inner surface of each of the first and second pressing pieces.

In addition, the present invention forms a groove on the outer surface of the other side of the first and second pressurized pieces so that the tensile force transmitted to the other side of the first and second pressurization pieces is not concentrated at a specific point and can be distributed through a certain area. By minimizing the deformation or damage of the other side of the 1st and 2nd pressing pieces, the rebar can be kept in a stable bonded state for a long time by the coupler.

1 is a schematic coupling configuration diagram of a coupler according to the present invention.
2 is a schematic cross-sectional view of a coupler according to the present invention.
Figure 3a is a schematic perspective configuration of a pressing piece in the coupler according to the present invention.
Figure 3b is a schematic cross-sectional configuration of the pressing piece in the coupler according to the present invention.
4A and 4B each is a schematic operational configuration diagram of a coupler according to the present invention.
Figure 5a is a state diagram of a pressing piece by a tensile force acting when the coupler according to the present invention is used for a long time.
Figure 5b is a state diagram of a pressing piece when using a conventional coupler for a long time.
Figure 6 is a schematic diagram of a conventional coupler for connecting reinforcement.

A detailed look at the preferred embodiments according to the present invention with reference to the accompanying drawings is as follows. In the above description of the embodiments of the present invention, there is no direct relation to the technical features of the present invention, or in the technical field to which the present invention belongs. For matters that are self-evident to those with knowledge of, detailed explanations will be omitted.

Each of FIGS. 1 and 2 is a schematic coupling configuration diagram and a cross-sectional configuration diagram of a coupler according to the present invention. The present invention, as disclosed in each drawing, the socket 20, the first and second bodies (32, 36), the first and second elastic bodies (42, 46), the first and second movable bodies (52, 56) and the It is characterized by including one and two pressing pieces (12, 16). Hereinafter, each of these components will be described in detail.

The socket 20 is a means for integrating each of the first and second bodies 32 and 36, and first and second threads 22 and 26 are formed on each of the outer surfaces of one and the other, and the inner and Each of the first and second settling grooves 23 and 27 having a predetermined depth is formed on the inner surface of the other portion.

The first body 32 is a portion into which the end of the reinforcing bar located at one portion is inserted, and the other portion has a cylindrical structure that is coupled to the first screw thread 22 of the socket 20. The second body 36 is a portion into which the end of the reinforcing bar located at the other side is inserted, and the second body 36 has a cylindrical structure in which the other side is coupled to the second thread 26 of the socket 20.

At this time, the inner surface of the other side of each of the first and second bodies 32 and 36 is downward with respect to the virtual horizontal line extending from the inner side of each of the first and second bodies 32 and 36 as disclosed in FIG. 2. It may be formed to be inclined by a certain angle θ2. This is for coupling with each of the first and second pressing pieces 12 and 16 to be described later.

One portion of the first elastic body 42 is in contact with one portion of the socket 20, and the other portion of the first elastic body 42 extends to an inner central portion of the first body 32. One side of the second elastic body 46 is in contact with the other side of the socket 20, and the other side of the second elastic body 46 extends to the inner central portion of the second body 36. Each of the first and second elastic bodies 42 and 46 may be formed of a conventional spring.

Each of the first and second pressing pieces (12, 16) is separated into a plurality of pieces and is arranged in an annular shape, and first and second engaging ends (13, 17) are formed on each inner surface, and each one side is the first, The two elastic bodies 42 and 46 are in contact with the other side of each, and each outer surface is in contact with the inner surfaces of the first and second bodies 12 and 16, respectively. Reference numerals 15 and 19 denote first and second contact ends that are stepped along the lower inner surfaces of the first and second pressing pieces 12 and 16, respectively.

At this time, the present invention proposes a case in which first and second grooves 14 and 18 are formed in each of the first and second pressing pieces 12 and 16 as shown in FIG. 3A. At this time, each of the first and second grooves (14, 18) is formed on the outer surface of the other side of the first and second pressing pieces (12, 16), respectively, the length direction of each of the first and second pressing pieces (12, 16) It is preferably formed to be orthogonal to.

The first and second grooves (14, 18) are formed on the outer surfaces of each of the first and second pressing pieces (12, 16), but the reason is that the first and second pressing pieces (12, 16) are formed on the outer surface of the other side, respectively, This is to make the first and second pressing pieces 12 and 16 in close contact with the inner surfaces of the first and second bodies 12 and 16, respectively. The specific operation configuration of the first and second grooves will be described later.

On the other hand, in each of the first and second pressing pieces 12 and 16, the first and second grooves 14 and 18 may be formed of at least one or more, and an example in which two of the grooves are formed is disclosed in the drawing. In this way, when each of the first and second grooves 14 and 18 are spaced apart from each other by a predetermined distance and formed in a plurality, each of the plurality of first and second grooves 14 and 18 is the first and second pressing pieces 12 and 16 It is preferable that the width is gradually formed from the other side to one side.

That is, as shown in the drawing, if each of the first and second grooves is made of two, it is necessary to form the groove so that the width of the groove is increased while going from the other side of each of the first and second pressing pieces (right in the drawing) to one side (left in the drawing). That's it. As can be seen in FIG. 5B, since the tensile force of the reinforcing bar is concentrated on the other side of each pressing piece, it is intended to induce the outer surface of the other side of the pressing piece to be concentrated on the inner surface and the uniform surface of each body as much as possible.

In addition, at this time, the outer surface of the other side of each of the first and second pressing pieces 12 and 16 is downward with respect to the virtual horizontal line extending from the outer surface of each of the first and second pressing pieces 12 and 16 as shown in FIG. 3B. It is formed to be inclined by a certain angle θ1, but the inclination angle θ1 of each of the first and second pressing pieces 12 and 16 is smaller than the inclination angle θ2 of the inner surface of the other side of each of the first and second bodies 32 and 36 described above. Suggest a configuration.

The outer surface of the other side of each of the first and second pressing pieces (12, 16) is in contact with the inner surface of the other side of each of the first and second bodies (32, 36). After forming in the relationship of θ1 <θ2, a certain external force is applied. In addition, when the outer surface of the other side of each of the first and second pressing pieces 12 and 16 is in close contact with the inner surface of the other side of each of the first and second bodies 32 and 36, it is possible to maintain tighter adhesion.

However, considering that each of the first and second pressurization pieces and the first and second bodies are made of iron, and the operator in the field must insert the first and second pressurization pieces into the first and second bodies, θ2 = θ1 It would be desirable to have a value within the range of +1°. Reference numerals 15 and 19 each denote first and second coupling grooves to which the first and second rings (not shown) are coupled.

As shown in FIGS. 2 and 3A, the first and second movable bodies 52 and 56 are provided with first and second intravenous ends 53 and 57 formed in a stepped annular shape, respectively, and the first and second movable bodies 52 and 56 The first and second contact ends 15 and 19 of the first and second pressing pieces 12 and 16 are in close contact with each of the ends 53 and 57. Reference numerals 51 and 55 denote first and second insertion holes formed in the central portions of the first and second movable bodies 52 and 56, respectively.

A schematic operating configuration of the present invention made of such a configuration will be described with reference to the above description and the accompanying drawings.

After positioning one portion of the first elastic body 42 on one side of the socket 20, the first pressing piece 12 and the first movable body 52 coupled as shown in FIG. 3A are placed in the first elastic body 42 ) It is located on the other side, and one side of the first body 32 is coupled with one side of the socket 20. And, after placing the other side of the second elastic body 46 on the other side of the socket 20, the second pressing piece 16 and the second movable body 56 are located on one side of the second elastic body 46 And, when one portion of the second body 36 is coupled with the other side of the socket 20, the coupler is coupled to form a structure as shown in FIG. 2.

In this state, the end of the first reinforcing bar (S1) on one side and the end of the second reinforcing bar (S2) on the other side are forcibly inserted through the other side of each of the first and second bodies (32, 36), and then external force By applying F1, the end of each of the first and second reinforcing bars S1 and S2 is continuously pushed into the inner space of each of the first and second pressing pieces 12 and 16 (refer to the direction F1 in FIG. 4A).

When the end of each of the first and second reinforcing bars (S1, S2) is continuously inserted into the inner space of the first and second pressing pieces (12, 16) by an external force, the ends of each of the first and second reinforcing bars (S1, S2) In the process of being inserted, the first pressing piece 12, the first movable body 52, the second pressing piece 16, and the second movable body 56 apply the first and second elastic bodies 42 and 46 with a certain force. As a result, the first and second pressing pieces 12 and 16 are pushed in the direction of the first and second elastic bodies 42 and 46 by a certain distance (refer to the arrow in FIG. 4A ).

When each of the first and second pressing pieces (12, 16) is pushed in the direction of the first and second elastic bodies (42, 46) by a certain distance, the first and second pressing pieces (12, 16) are in contact with the outer surfaces of each of the first and second pressing pieces (12, 16). The inner diameter of each of the bodies 32 and 36 increases, and accordingly, the inner diameter of each of the first and second pressing pieces 12 and 16 in contact with the outer surfaces of the ends of each of the first and second reinforcing bars S1 and S2 is also a certain width. Increases.

When the inner diameter of each of the first and second pressing pieces (12, 16) is increased by a certain width, the ends of each of the first and second reinforcing bars (S1, S2) pass through each of the first and second pressing pieces (12, 16). The first and second movable bodies 52 and 56 are pushed into the first and second settling grooves 23 and 27 through the respective insertion holes 51 and 55. Accordingly, each of the first and second reinforcing bars S1 and S2 is closely coupled to the coupler as shown in FIG. 4A.

After the end of each of the first and second reinforcing bars (S1, S2) is combined with the coupler, the building is completed through a concrete pouring process, and then the first and second reinforcing bars (S1, S2) each have a tensile force F2 as shown in FIG. 4B. Works. When the tensile force F2 acts on each of the first and second reinforcing bars (S1 and S2), the end portions of each of the first and second reinforcing bars (S1 and S2) are the first and second pressing pieces 12 and 16, respectively. It is pulled a certain distance in the direction of the tensile force F2 while being engaged with each of the locking ends 13 and 17.

Since the inclination angle θ1 of the other side of each of the first and second pressing pieces 12 and 16 and the inclination angle θ2 of the inner surface of the other side of each of the first and second bodies 32 and 36 have a relationship of θ1 <θ2, the first , When the ends of each of the 2 reinforcing bars (S1, S2) are pulled by the tensile force F2 (refer to the arrow in Fig. 4b), the first and second pressing pieces (12, 16) are each in the first and second bodies (32, 36). It comes into contact with the area whose inner diameter is reduced.

Accordingly, each of the first and second pressing pieces (12, 16) is in contact with the inner surface of each of the first and second bodies (32, 36) and each inner diameter is naturally reduced, and the first and second reinforcing bars (S1, S2), respectively The outer surface of the end portion is in close contact with the inner surfaces of each of the first and second pressing pieces 12 and 16 reduced by a certain width, forming a very strong bond, and is primarily fixed.

In addition to this, since the first and second grooves 14 and 16 are formed on the other side of the outer surface of each of the first and second pressing pieces 12 and 16, a greater seating force F2 is applied to the first and second reinforcing bars ( S1, S2) Even if the tensile force is concentrated on the other side of the first and second pressing pieces 12 and 16 by acting on each end portion, the applied tensile force is around the first and second grooves 14 and 18 as shown in FIG. 4B. It is distributed to a more uniform value f through the surface of and is transmitted to the first and second bodies 32 and 36, respectively.

In other words, as in the prior art, the tensile force is not concentrated at a specific point on the other side of the first and second pressing pieces, and can be distributed over a certain area around the first and second grooves. There will be. 5A shows the results of a tensile force test in a state in which the reinforcing bar is coupled to the coupler according to the present invention. As compared to FIG. 5B, which is the result of the conventional product, the degree of deformation thereof is appropriately distributed around the groove. You can see that it happens very little.

In the above, the description has been limited to the preferred embodiments of the present invention, but this is only an example, and the present invention is not limited thereto and may be changed and implemented in various ways, and further, a separate technical feature is provided based on the disclosed technical idea. It will be obvious that it can be added and implemented.

12, 16: 1st, 2nd pressing piece 20: socket
32, 36: first and second bodies 42, 46: first and second elastic bodies
52, 56: first and second moving bodies

Claims (3)

The socket 20 having first and second threads 22 and 26 formed on one side and the other side, respectively, a first body 32 having a cylindrical structure in which the other side is coupled to the first thread 22, and the other side 2 A second body 36 of a cylindrical structure coupled to the screw thread 46, a first elastic body 42 in which one part is in contact with one part of the socket 20, and a second body in which one part is in contact with the other part of the socket 20. 2 The elastic body 46 is divided into a plurality of pieces, but each inner surface has a first engaging end 13 so that one side of each is in contact with the other side of the first elastic body 42, and each outer surface is the first body 12 The first pressing piece 12, which is in contact with the inner surface of and is arranged in an annular shape, is divided into a plurality of pieces, but a second engaging end 17 is formed on each inner surface, so that each one part is connected to the other part of the second elastic body 46. The first movable body in contact with the inner surface of each of the second pressing pieces 16 in contact with the inner surface of the second body 16 and arranged in an annular shape, and the first pressing pieces 12 arranged in an annular shape with the outer surface of each (52) As a one-touch coupler for connecting reinforcing bars comprising a second movable body 56 in contact with the inner surface of each of the second pressing pieces 16 arranged in an annular shape,
On the outer surface of the other side of each of the first and second pressing pieces 12 and 16, first and second grooves 14 and 18 perpendicular to the longitudinal direction of each of the first and second pressing pieces 12 and 16 are formed. One-touch coupler for connecting reinforcing bars, characterized in that. The method of claim 1,
Each of the first and second grooves (14, 18) is made of a plurality of formed spaced apart from each other at a predetermined interval, each of the plurality of first and second grooves (14, 18) are each of the first and second pressing pieces (12, 16) ) One-touch coupler for reinforcing bar connection, characterized in that the width is gradually formed wider from each other to one side. The method of claim 1,
The outer surface of the other side of each of the first and second pressing pieces 12 and 16 is inclined downward by a certain angle θ1 with respect to the virtual horizontal line extending from the outer surface of one side of each of the first and second pressing pieces 12 and 16 Become; The inner surface of the other side of each of the first and second body (32, 36) in contact with the outer surface of the other side of the first and second pressing pieces (12, 16) is each of the first and second pressing pieces (12, 16). The first and second bodies 32 and 36 in contact with the outer surface of one side have an angle smaller than θ1 with respect to the virtual horizontal line extending from the inner surface of each of the first and second bodies 32 and 36 and are formed to be inclined downward by a predetermined angle θ2; One-touch coupler for connecting reinforcing bars, characterized in that.

Images