KR102640179B1 - Coupler for rebar connection - Google Patents

Abstract

The present invention relates to a coupler for connecting reinforcing bars that can be easily and safely connected to existing reinforcing bars or existing buildings by operating the coupler in a structure or position where the reinforcing bars cannot be rotated. It consists of a pivoting outer tube coupled to the fixed inner tube, and a wedge made up of a plurality of divided bodies equipped with pressurized male screws on the outer surface to pressurize and fix the connecting reinforcing bar in a state inserted into the inner surface of the pivoting outer tube, the inner surface of the pivoting outer tube It is divided into a flat inner surface and an inclined inner surface, and the flat surface is provided with a rotating female screw to be fastened to the fixed male screw of the fixed inner pipe, and the inclined inner surface is provided with a pressurized female screw to be fastened to the pressurized male screw of the wedge.

Description

Coupler for connecting rebar {COUPLER FOR REBAR CONNECTION}

The present invention relates to a coupler for connecting reinforcing bars that allows reinforcing bars to be interconnected or to connect reinforcing bars to an existing building for expansion. More specifically, the coupler is operated in a structure or position where the reinforcing bars cannot be rotated to connect the existing reinforcing bars or the reinforcing bars. This is about a coupler for connecting rebar that can be easily and safely connected to existing buildings.

In a reinforced concrete structure, reinforcing bars enable the reinforced concrete structure to have high structural efficiency through various functions that compensate for the shortcomings of concrete.

These rebars not only require splices as a means of solving limitations in production length due to factors such as transportation, but also require splices to connect the ends according to various structural shapes.

For example, when it is desired to install an auxiliary column on a steel column for structural reinforcement, a coupler for connecting reinforcing bars is fixed to the flange surface of the steel column by welding, and the reinforcing bars are connected to the coupler by screwing, etc.

Additionally, for future expansion, the coupler can be buried in advance inside the concrete structure. The reinforcing bar connector of Registered Patent Publication No. 10-2477305 is for this purpose. As shown in FIG. 1, the fixture (3) is fixed to the form (B), and the fixture (3) is used to connect the reinforcing bar connector (1). After installing the main body (2) in the form (B), concrete (C) is poured, so that the main body of the reinforcing bar connector (1) is embedded within the concrete structure. Therefore, in the future, it will be possible to rotate the reinforcing bars and connect them to the concrete structure using a screw fastening method.

However, there are cases where the reinforcing bars cannot be rotated depending on the shape of the structure to be expanded or the work environment. In this case, there is a problem in that it is impossible to use a coupler with the same structure as the reinforcing bar connector (1).

KR 10-2477305 B1

The present invention is intended to solve the above-mentioned problems of the prior art, and the coupling between the coupler and the reinforcing bar is firmly established just by the operator operating the coupler, so that not only the connection and installation of the reinforcing bar to the concrete structure is possible, but also the joint between two reinforcing bars. The purpose is to provide a coupler for connecting rebar that allows easy connection.

In the most preferred embodiment of the present invention for solving the above problems, a fixed inner tube provided with a fixing male screw on the outer surface, a rotating outer tube coupled to the fixed inner tube by rotating, and a connection while inserted into the inside of the rotating outer tube It is composed of a wedge made up of a plurality of divided parts with pressurized male screws on the outer surface to pressurize and fix the reinforcing bar, and the inner surface of the rotating outer tube is divided into a flat inner surface and an inclined inner surface, and the flat surface is provided with a rotating female screw to form a fixed inner tube. A coupler for connecting rebar is provided, which is fastened to a fixed male screw, and is provided with a pressurized female screw on the inner surface of the slope and fastened to the pressurized male screw of the wedge.

At this time, the rotational direction of the rotating outer tube for fastening the rotating female screw and the fixing male screw is configured to match the rotational direction of the rotating outer tube for fastening the pressurizing female screw and the pressurizing male screw, so that when the rotating external tube is rotated in one direction, the coupling length to the fixed inner tube As increases, the degree of pressurization of the wedge against the connecting rebar can increase. In addition, the rotating female screw and the pressure female screw can be configured to have the same pitch of each thread.

In addition, in another embodiment of the present invention, a close contact jaw is formed at one end of the fixing inner tube in contact with the end of the connecting reinforcing bar, or a through hole through which the connecting reinforcing bar passes is formed. In addition, a welding groove may be provided at the other end of the fixed inner tube.

In addition, in another embodiment of the present invention, a fixing female screw for a fixing rebar is provided on the inner surface of the fixing inner tube.

The present invention can be used to connect and fix connecting reinforcing bars to connected members by rotating the rotating exterior, so it has the versatility to easily perform joint connection work even in an environment where connecting reinforcing bars cannot be rotated.

In addition, the present invention allows the joint connection to be made while maintaining the end of the connecting reinforcing bar in close contact with the connected member, so that sliding displacement does not occur even if a load is applied to the connecting reinforcing bar after the joint connection work is completed, thereby preventing the joint connection. It not only makes the work easy, but also ensures reliability in the quality of construction.

Figure 1 is a diagram showing the use of a rebar connector according to the prior art.
Figure 2 is a perspective view of a coupler for connecting rebar according to the first embodiment of the present invention.
Figure 3 is a cross-sectional view of a coupler for connecting rebar according to the first embodiment.
Figure 4 is an explanatory diagram of the operation of the coupler for connecting rebar according to the first embodiment.
Figure 5 is an explanatory diagram of the use of the coupler for connecting rebar according to the first embodiment.
Figure 6 is a cross-sectional view of a coupler for connecting rebar according to a second embodiment of the present invention.
Figure 7 is an explanatory diagram of the operation of the coupler for connecting rebar according to the second embodiment.
Figure 8 is an explanatory diagram of the use of the coupler for connecting rebar according to the second embodiment.
Figure 9 is a cross-sectional view of the coupler for connecting rebar according to the third embodiment described above.
Figure 10 is an explanatory diagram of the use of a coupler for connecting rebar according to the third embodiment.

Hereinafter, the present invention will be described in detail with reference to the attached drawings based on the most preferred embodiment. However, when explaining the present invention in detail, if the technical idea of the present invention is obscured or unclear, the description of the known configuration will be omitted.

Figures 2 to 5 show the first embodiment of the present invention, Figures 6 to 8 show the second embodiment of the present invention, and Figures 9 and 10 show the third embodiment of the present invention. It is shown.

The coupler for connecting reinforcing bars of the present invention is very efficient even under conditions in which the connecting reinforcing bars 40 cannot be rotated, unlike the conventional method of rotating the connecting reinforcing bars 40 to connect the connecting reinforcing bars 40 to the connected member. It is intended to be used as a fixed inner tube (10), which is firmly fixed and coupled to a steel material such as the steel frame (43) or other reinforcing bar as a connected member by welding or screwing, and the fixed inner tube (10) by rotating it. It consists of a pivotable outer tube 20 that is combined with the connecting reinforcing bar 40 via a wedge 30 to be described later, and a wedge 30 that pressurizes and fixes the connecting reinforcing bar 40.

As described above, the rotating outer tube (20) is coupled to the fixed inner tube (10) by rotating itself, and the rotating outer tube (20) has an inner diameter that is the outer diameter of the fixed inner tube (10) so as to surround the fixed inner tube (10). It must be configured to correspond to and a rotating female screw (24) is provided on its inner side.

The outer surface of the fixed inner tube 10 is also provided with a fixed male screw 11 for being coupled to the rotating female screw 24 by a screw fastening method.

The wedge 30 is composed of a plurality of partitions 30a with an inclined outer surface 32, and is a medium that pressurizes the connecting reinforcing bar 40 and fixes it to the rotating outer tube 20, and is provided on each outer peripheral surface thereof. By inserting the O-ring 35a into the ring groove 35, the plurality of divided parts 30a form an integral wedge 30.

This wedge 30 presses the connecting reinforcing bar 40 by rotating the rotating outer tube 20 in one direction while inserted inside the rotating outer tube 20, and has a pressurized male screw 33 on the outer surface. is provided, and a rib groove 34 into which the rib 40a of the connecting reinforcing bar 40 is inserted is provided on the inner surface.

As shown in FIG. 3, the rotating outer tube 20 has a structure in which one side is fastened to the fixed inner tube 10 and the other side is fastened to the wedge 30. The inner surface is divided into a flat inner surface 23 and an inclined inner surface 25, and the flat inner surface 23 is provided with a rotating female screw 24 and the inclined inner surface 25 is provided with a pressurized female screw 26.

The rotating female screw (24) is fastened with the fixing male screw (11) of the fixed inner tube (10) and is integrally and fixedly coupled to the rotating outer tube (20) with respect to the fixed inner tube (10), and the pressurized female screw (26) is While being fastened to the pressurized male screw 33 of the wedge 30, each segment 30a of the wedge 30 is pressed so that the connecting reinforcing bars 40 are integrally fixed to the rotating outer tube 20.

At this time, as shown in FIG. 4, when the rotatable outer tube 20 is rotated in one direction, it is desirable to simultaneously engage the fixed inner tube 10 and pressurize the wedge 30. In one embodiment of the coupling structure of the fixed inner tube 10, the rotating outer tube 20, and the wedge 30, the rotating female screw 24 of the rotating outer tube 20 and the fixed male screw 11 of the fixed inner tube 10 are The rotational direction of the pivoting outer tube (20) to be fastened is configured to match the rotational direction of the pivoting outer tube (20) to fasten the pressurized female screw (26) of the pivoting outer tube (20) and the pressurizing male screw (33) of the wedge (30). do. Accordingly, when the rotating outer tube 20 is rotated in one direction, the coupling length with respect to the fixed inner tube 10 increases and at the same time, the degree of pressing of the wedge 30 with respect to the connecting reinforcing bar 40 increases.

On the other hand, when the connecting reinforcing bar 40 connected through the coupler is subjected to a compressive load as in the vertical main bar of a column, the connecting reinforcing bar 40 is prevented from being displaced, such as being pushed out by the compressive load, inside the coupler. Needs to be.

To this end, in another embodiment of the coupling structure of the fixed inner tube 10, the rotating outer tube 20, and the wedge 30 of the present invention, the rotating female screw 24 provided on the inner surface of the rotating outer tube 20 and the pressurized The pitch of each thread of the female thread 26 is configured to be the same. Of course, in this case, the pitch of each thread of the fixing male screw (11) of the fixed inner tube (10) fastened to the rotating female screw (24) and the pressurized male screw (33) of the wedge (30) fastened to the pressurized female screw (26) is also configured to be the same. It has to be.

Due to the same pitch interval, the relative moving distances of the fixed inner tube 10 and the wedge 30 according to the rotation of the pivotable outer tube 20 match each other.

Accordingly, while maintaining the end of the connecting reinforcing bar 40 in close contact with the end of the fixed inner tube 10 or the steel surface of the steel frame 43, which is a connected member, the fixed inner tube 10, the rotating outer tube 20, and the wedge It is possible to proceed with each combination of the connecting reinforcing bars (40) via (30). Specific details regarding this will be described again through the embodiments described later.

The coupler for connecting reinforcing bars of the present invention can be divided into the above-described first to third embodiments depending on the specific shape of the fixing inner tube 10, and these will be described with reference to each drawing as follows.

Figure 2 shows the overall appearance of the coupler for connecting rebar according to the first embodiment of the present invention, Figure 3 shows a cross section of the coupler for connecting rebar according to the first embodiment, and Figure 4 shows the second embodiment of the present invention. An explanation of the fastening of the fixed inner tube 10 and the wedge 30 by the operation of the rotating outer tube 20 in the coupler for connecting rebar according to the first embodiment is shown in the drawing, and FIG. 5 shows the first embodiment. A description of the use of a coupler for connecting rebar is shown in the drawing.

As shown in FIG. 3, the coupler for connecting reinforcing bars according to the first embodiment of the present invention has a contact jaw 12 formed at one end of the fixed inner tube 10 so that the end of the connecting reinforcing bar 40 is in close contact. do.

The contact jaw 12 ensures that the ends of the connected reinforcing bars 40 are in close contact, so that even if compressive force occurs in the connecting reinforcing bars 40, displacement such as sliding of the connecting reinforcing bars 40 in the longitudinal direction does not occur. It is possible to maintain a stable connection without any problems.

In addition, as described above, in the case of the rotating outer shell 20 in which the thread pitches of the rotating female screw 24 and the pressure female screw 26 are the same, the end of the connecting reinforcing bar 40 is fixed as shown in (a) of Figure 4. When the rotating outer tube 20 is rotated in the fastening direction while in close contact with the contact ledge 12 of the inner tube 10, the end of the connecting reinforcing bar 40 and the contact ledge 12 are shown in (b) of FIG. 4. While the state of close contact between the two is maintained, only the rotating outer tube 20 moves in the direction toward the fixed inner tube 10, and fastening and pressurization with the fixed inner tube 10 and the wedge 30 proceed.

Therefore, it is possible to easily maintain the close contact state of the end of the connecting reinforcing bar 40 to the contact jaw 12, thereby facilitating the connecting work and ensuring reliability of the fixed state of the connecting reinforcing bar. It is possible to secure.

The coupler for connecting reinforcing bars according to this first embodiment is installed by welding the fixed inner tube 10 to a connected member such as the steel frame 43 ((a) in Figure 5) and wrapping the connecting reinforcing bar 40. After inserting the wedge 30 fixed with the O-ring 35a into the inside of the rotating outer tube 20 ((b) in Figure 5), the rotating outer tube 20 is rotated in one direction and fixed to the rotating outer tube 20. It is used to complete the coupling between the inner tube 10 and the coupling between the rotating outer tube 20 and the connecting reinforcing bar 40 ((c) in Figure 5).

In order to weld the fixed inner tube 10 to the connected member, a welding groove 14 may be further provided at the other end of the fixed inner tube 10, and this is the same in the second embodiment described later.

Figure 6 shows a cross section of the coupler for connecting reinforcing bars according to the second embodiment of the present invention, and Figure 7 shows the fixed inner pipe (20) by the operation of the rotating outer pipe (20) in the coupler for connecting reinforcing bars according to the second embodiment. 10) and the wedge 30 are illustrated in drawings, and FIG. 8 illustrates the use of the coupler for connecting reinforcing bars according to the second embodiment.

As shown in FIG. 6, the coupler for connecting reinforcing bars according to the second embodiment of the present invention does not have a close contact jaw 12 formed at one end of the fixed inner tube 10, but has a penetration through which the connecting reinforcing bar 40 passes. It is different from the first embodiment described above in that the ball 13 is formed.

The through hole 13 causes the end of the connecting reinforcing bar 40, which has passed through the fixed inner tube 10, to come into close contact with the steel surface of the steel frame 43, which is a connected member, so that the steel surface is in close contact with the above-mentioned contact jaw ( 12) functions.

That is, the end of the connected reinforcing bar 40 that has been fastened is brought into direct contact with the connected member, so that even if a compressive force occurs in the connecting reinforcing bar 40 as in the first embodiment, no sliding displacement occurs in the connecting reinforcing bar 40. It allows maintaining a stable connection.

In addition, in the case of the rotating outer pipe 20 where the thread pitches of the rotating female screw 24 and the pressurized female screw 26 are the same, the connecting reinforcing bar 40 penetrates the fixed inner pipe 10 as shown in (a) of Figure 7. When the rotating outer tube 20 is rotated in the fastening direction while passing the ball 13 and keeping its end in close contact with the surface of a steel material such as the steel frame 43, which is a connected member, the connection is made as shown in (b) of FIG. 7. While the close contact between the end of the reinforcing bar 40 and the steel surface is maintained, only the rotating outer tube 20 moves in the direction of the fixed inner tube 10, and is fastened and pressed to the fixed inner tube 10 and the wedge 30. This goes on.

Therefore, as in the first embodiment, it is possible to easily bring the ends of the connecting reinforcing bars 40 into close contact with the steel surface without taking any additional measures, thereby facilitating the connection work.

The coupler for connecting reinforcing bars according to this second embodiment is installed by welding the fixed inner pipe 10 to a connected member such as the steel frame 43 ((a) in Figure 8) and wrapping the connecting reinforcing bar 40. After inserting the wedge 30 fixed with the O-ring 35a into the inside of the rotating outer tube 20 ((b) in Figure 8), the rotating outer tube 20 is rotated in one direction and fixed to the rotating outer tube 20. It is used to complete the coupling between the inner tube 10 and the coupling between the rotating outer tube 20 and the connecting reinforcing bar 40 ((c) in Figure 8).

If the coupler for connecting reinforcing bars according to the first and second embodiments described above is suitable for use with vertical reinforcing bars of column members, the coupler for connecting reinforcing bars according to the third embodiment described later is used for reinforcing bars embedded in concrete or It can be very effectively used when connecting both ends like a band rebar.

Figure 9 shows a cross-section of the coupler for connecting reinforcing bars according to the third embodiment described above, and Figure 10 illustrates the use of the coupler for connecting reinforcing bars according to the third embodiment.

The fixing inner tube 10 of the coupler for connecting rebar according to the third embodiment is different from that of the first and second embodiments described above in that a fixing female screw 15 is provided on the inner surface.

The fixing female screw 15 may be a fixed reinforcing bar 42 embedded in concrete, may be one end of a strip reinforcing bar, or may be another reinforcing bar for connecting the reinforcing bars. Here, the reinforcing bars, which are connected members, are referred to as fixed reinforcing bars 42 to distinguish them from the connecting reinforcing bars 40.

The outer surface of the fixing reinforcing bar 42 is provided with a screw thread and is fastened to the fixing female screw 15 provided on the inner surface of the fixing inner tube 10. In the case where the fixing reinforcing bar 42 is embedded in reinforced concrete, a part of the fixing inner tube 10 (10) is fastened to the fixing reinforcing bar 42 (the part where the fixing screw 11 is not formed) may be previously embedded in concrete. You can.

At one end of the fixing inner tube 10 in the third embodiment, a close contact protrusion 12 as in the first embodiment may be provided, and a through hole 13 as in the second embodiment may be formed. , the description of this embodiment and the drawings for it are given as an example of the case where the former close contact jaw 12 is provided.

The action of the close contact shoulder 12 and the through hole 13 is not different from that of the close contact shoulder 12 and the through hole 13 in the first and second embodiments described above. For example, the end of the connecting reinforcing bar 40 is in close contact with the contact jaw 12 or the end of the fixed reinforcing bar 42 pre-fastened to the fixed inner tube 10, and the angle of the rotating female screw 24 and the pressurizing female screw 26 In the case of the rotating outer pipe (20) with the same thread pitch, only the rotating outer pipe (20) is fixed with the end of the connecting reinforcing bar (40) remaining in close contact with the end of the contact jaw (12) or the fixing reinforcing bar (42). The fastening and pressing of the fixed inner tube 10 and the wedge 30 while moving in the direction of 10) are also the same.

The coupler for connecting reinforcing bars of the third embodiment fastens the fixed inner tube 10 to the fixed reinforcing bar 42 by screwing (Figure 10 (a)), and wraps the connecting reinforcing bar 40 with an O-ring (35a). After inserting the wedge 30 fixed with ) into the inside of the rotating outer tube 20 ((b) in Figure 10), the rotating outer tube 20 is rotated in one direction to form the rotating outer tube 20 and the fixed inner tube 10. It is used in a way to complete the coupling between the coupling and the rotational exterior (20) and the connecting reinforcing bar (40) (Figure 10 (c)).

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are merely examples to make the present invention easier to understand, so those skilled in the art will understand the scope of the technical idea of the present invention. It is obvious that this can be implemented with various modifications. Accordingly, such modifications will be said to fall within the scope of the present invention as set forth in the claims.

10; fixed inner tube 11; fixed screw
12; Close jaw 13; through hole
14; weld groove 15; Fixed female screw
20; Hoedong exterior 23; Pyeongtannae-myeon
24; Rotating female screw 25; If you slope
26; Pressurized female screw 30; wedge
30a; segment 32; Slanted exterior surface
33; Pressurized male screw 34; Live Home
35; ring groove 35a; o-ring
40; Connecting rebar 40a; live
42; Fixed rebar 43; iron frame

Claims (7)

A fixed inner tube (10) provided with a fixing male screw (11) on the outer surface,
A rotating outer tube (20) coupled to the fixed inner tube (10) by rotating it,
It is composed of a wedge 30 made up of a plurality of divisions 30a with pressurized male screws 33 on the outer surface to press and secure the connecting reinforcing bar 40 in a state inserted into the rotating outer pipe 20,
The inner surface of the rotating outer tube 20 is divided into a flat inner surface 23 and an inclined inner surface 25, and the flat inner surface 23 is provided with a rotating female screw 24 to connect the fixing male screw 11 of the fixed inner tube 10. It is fastened, and the inclined inner surface 25 is provided with a pressurized female screw 26 to be fastened to the pressurized male screw 33 of the wedge 30,
The rotational direction of the pivoting outer tube (20) for fastening the rotating female screw (24) and the fixing male screw (11) matches the rotational direction of the rotating outer tube (20) for fastening the pressurizing female screw (26) and the pressurizing male screw (33). The rotating female screw (24) and the pressurized female screw (26) are configured to have the same thread pitch, so that when the rotating outer pipe (20) is rotated in one direction, the coupling length to the fixed inner pipe (10) increases and at the same time, the connecting rebar The degree of pressurization of the wedge 30 with respect to (40) increases, and the relative moving distances of the fixed inner tube 10 and the wedge 30 become consistent with each other,
A coupler for connecting reinforcing bars, characterized in that a close contact jaw (12) is formed at one end of the fixing inner tube (10), which contacts the end of the connecting reinforcing bar (40). delete delete delete According to paragraph 1,
A coupler for connecting reinforcing bars, characterized in that a welding groove (14) is provided at the other end of the fixing inner tube (10). According to paragraph 1,
A coupler for connecting reinforcing bars, characterized in that a through hole (13) through which the connecting reinforcing bar (40) passes is formed at one end of the fixing inner tube (10). According to paragraph 1,
A coupler for connecting reinforcing bars, characterized in that the inner surface of the fixing inner tube (10) is provided with a fixing female screw (15) for fixing rebar.

Images