KR102154938B1 - Coupler for steel reinforcement improved assembly structure - Google Patents

Abstract

The present invention relates to a rebar coupler with improved assembling properties, which allows a plurality of wedge pieces to be set in one bundle maintaining an arrangement in a perfect circular shape while maintaining an interval between each other so that assembly with respect to a housing can be remarkably, stably and simply implemented and allows wedge sets to be exactly and closely assembled in an optimum position of the housing so that assembly productivity, assembly qualities and product quality properties can be remarkably improved. To this end, the rebar coupler includes: a pair of wedge sets in which the outside of a body is formed to be tapered and which have a locking protrusion for grasping rebar on an inner wall of a hollow through which the rebar can penetrate and are divided into a plurality of wedge pieces so that an inner diameter of the hollow can be expanded; a pair of housings receiving the wedges sets, including a taper part formed to correspond to a taper angle of the body of the wedge sets so that a diameter of the hollow of the wedge sets can be expanded, and having a screw part to be coupled to each other; and a spring installed in the housing to elastically support the wedge sets. The rebar coupler also includes a wedge binding ring inserted into at least one surface of both front end surfaces of the wedge sets and arranging and connecting the plurality of wedge pieces in a perfect circular form to be set in one bundle.

Description

Rebar coupler with improved assembly properties {COUPLER FOR STEEL REINFORCEMENT IMPROVED ASSEMBLY STRUCTURE}

In the present invention, a plurality of wedge pieces are set as a single bundle that maintains a garden-shaped arrangement while maintaining a gap between each other, so that assembly to the housing is made remarkably stable and simple, and the wedge set is accurately assembled in close contact with the appropriate position of the housing. It relates to a reinforcing bar coupler with improved assembling property to significantly improve assembly productivity and quality of assembly.

The method of connecting the reinforced reinforcing bars to the concrete structure was a double joint method, a welding joint method, and a screw joint method, but recently, a one-touch rebar coupler that can quickly and accurately connect the reinforcing bars in a straight line has been widely used.

One-touch reinforcing bar coupler 100 is a pair of wedge sets 110 for gripping reinforcing bars 3 inserted from both sides, and a housing 120 for accommodating the wedge set 110, as generally shown in FIG. 1 , Composed of a spring 130 for pressing and fixing the wedge set 110.

As shown in FIG. 2, the wedge set 110 has a hollow portion through which the reinforcing bar can penetrate inside the body, and the outside of the body has a tapered portion whose diameter is narrowed toward the tip of both sides, and a locking protrusion 111 ) Is formed, and this body is divided into 3 to 4 pieces,

The housing 120 is provided with a tapered portion corresponding to the taper of the wedge set 110 in the hollow portion.

When the reinforcing bar 3 is pushed into the coupler 100 according to the above configuration, the wedge set 110 is pushed in by the elasticity of the spring 130, thereby opening the gap 113 between the divided wedge pieces 110a, and thus the reinforcing bar is When it enters smoothly and the reinforcing bar is pulled in the direction of separation, the wedge set 110 is pulled by the reinforcing bar, and the tapered wedge set is tightened by the tapered portion of the housing, so that the reinforcing bar is firmly pressed and gripped.

Such a rebar coupler makes reinforcement work remarkably easy by connecting two reinforcing bars by a simple operation of inserting two reinforcing bars opposite each other.

However, the conventional rebar coupler 100 has a problem that the assembly operation is very cumbersome and the assembly quality is also inferior in accuracy.

In the assembling work of the coupler, when inserting the divided wedge pieces into the hollow part of the housing first, the wedge pieces are inserted one by one, but the inserted pieces are difficult to locate, and the previously inserted pieces are in a state that maintains the garden. In a difficult situation, the second, third, and fourth pieces are put in, and during this process, the wedge pieces pour into the housing space, making it difficult for the wedge pieces to be stably installed, and setting time is excessive.

In addition, in order for the wedge set to maintain a garden state, the gap 113 between the wedge pieces must be accurately maintained, and for this purpose, as disclosed in Patent Registration No. 10-1796538, a separate gap guide member is provided. It is also equipped with additional parts.

However, the guide member only guides the gaps between the wedge pieces, it is difficult to prevent the wedge pieces from pouring out, and there is a disadvantage in that separate parts cost and assembly process are required.

In addition, even when the guide member is installed, there is a problem in that the assembly state is unstable, such as the wedge pieces 110a are not in close contact with the housing and are spaced apart and make a rattling sound.

In addition, when assembling the wedge set 110 to the housing 120, the gap between the wedge pieces 110a cannot be maintained, and as a result, the wedge set moves out of the set position from the housing and pushes further toward the rebar insertion port, thereby reducing the inner diameter of the wedge set. There is a problem that the reinforcing bar is difficult to insert.

In addition, a spring 130 for fixing the position by applying pressure to the wedge pieces 110a is inserted, and the spring 130 is in a free state until the assembly of a pair of housings 120 is completed. By maintaining the wedge pieces until the assembly of both housings is completed, the fixed state of the wedge pieces is unstable and the setting is broken, while the assembly work of both housings must be carried out while overcoming the spring elastic pressure in the free state. There is a troublesome difficulty carrying.

That is, in the prior art, since the spring 130 is placed in a free state until the assembly is completed by setting the wedge set in both housings and the spring is inserted, the setting of the wedge set that has been hardly set at the moment the assembler releases the spring The spring cannot be left in a free state until it breaks down and assembly is complete.

Therefore, the assembly work must be performed while simultaneously pressing the springs on both housings, and this has a problem that assembly is very cumbersome and assembly productivity and assembly quality are deteriorated.

Registered patent KR 10-2027640 (2019.10.01.) Registered patent KR 10-1796538 (2017.11.10.) Registered patent KR 10-1951882 (2019.02.25.)

The present invention is to solve the above problems,

An object of the present invention is that a plurality of wedge pieces are set as a single connecting bundle that maintains a garden-shaped arrangement while maintaining a gap between each other, so that assembly to the housing is made remarkably stable and simple, and the wedge set is placed in an appropriate position of the housing. It is intended to provide a reinforced coupler with improved assembly performance that can significantly improve assembly productivity and assembly quality by allowing it to be accurately and closely assembled.

Another object of the present invention is to provide a reinforced coupler with improved assembly properties to prevent waste of parts cost and assembly man-hours by eliminating a separate gap guide for maintaining a gap between wedge pieces.

Another object of the present invention is to provide a reinforced coupler with improved assembleability to facilitate assembly of the coupler by stably maintaining the compressed state so that the spring can support the wedge set at the stage prior to the entire assembly of the coupler. have.

A reinforcing bar coupler with improved assembly properties according to the present invention achieving the above object

A pair of wedge sets formed by dividing into a plurality of wedge pieces so that the outside of the body is tapered and a locking protrusion for gripping the reinforcing bar is provided on the inner wall of the hollow portion through which the reinforcing bar is penetrable;

A pair of housings accommodating the wedge set and including a tapered portion formed to correspond to a taper angle of the wedge set body such that the diameter of the hollow portion of the wedge set is expandable and contractible, and coupled to each other by having a screw portion; And

Includes; a spring installed in the housing to elastically support the wedge set,

It characterized in that it comprises a wedge binding ring is inserted and installed on one or more of the front end surface of the wedge set, the plurality of wedge pieces arranged in a circle shape and set as a single bundle.

In the wedge set, a ring groove for inserting and installing the wedge binding ring is formed on one or more of the front end surfaces of both sides of the plurality of wedge pieces,

The wedge binding ring is composed of a C-shaped ring having elasticity, and is inserted into the ring groove of the plurality of wedge pieces and then bonded to be integrated with the plurality of wedge pieces.

The wedge binding ring may be caulked after inserting the ring grooves of the plurality of wedge pieces.

The wedge set may be set such that the side of the reinforcing bar is opened at an arbitrary angle.

At least one of the pair of housings may be provided with a lock for restraining the spring in a compressed state.

In order to install the locker, the housing is provided with a locker fixing screw,

The lock may have a threaded portion formed around the disk-shaped body and screwed to the housing, and a wrench hole for a fastening tool may be formed in the central portion.

In order to install the locker, the housing is provided with a locker installation portion including a protruding jaw for fixing the locker,

The protruding jaw may be formed such that forced press-in of the lock is possible and separation is prevented.

The pair of housings are provided with a ♀♂-type threaded portion for mutual coupling,

One of the pair of housings is a long housing with a space where a wedge set, a spring, a locker and a spring for the other side are installed and a ♀-type threaded portion, and a short housing having a space for accommodating a wedge set and a ♂-type threaded portion It can be composed of.

An intermediate member connecting the two housings is provided between the pair of housings,

The intermediate member may be screwed with the pair of housings, and an intermediate plate for pressing the spring may be formed.

According to the reinforcing bar coupler having the above configuration and improving the assembly properties according to the present invention,

A wedge binding ring with elasticity and support is provided in the wedge set, so that a plurality of wedge pieces are set into a single connecting bundle that maintains a garden-shaped arrangement while maintaining a gap between each other, and thus assembly of the housing is stably and easily. Configuration and significantly improves assembly productivity.

In addition, the wedge set is set so that the reinforcing bar insertion port side is widened using a wedge binding ring, so that the wedge set is accurately assembled in an appropriate position of the housing and separation is prevented, thereby remarkably improving the assembly quality and quality characteristics of the product.

In addition, there is an advantage in that a separate gap guide can be eliminated by the wedge binding ring, thereby reducing parts cost and assembly man-hours.

In addition, in a step before the entire assembly of the coupling is performed, the spring can support the wedge set and a lock is fixed in the housing to stably maintain the compressed state, so that assembly of the coupler is remarkably simple and easy.

1 is a cross-sectional view showing the configuration of the prior art
2 is a view showing the configuration of a general wedge set
3 is a cross-sectional view showing the configuration of an embodiment according to the present invention
4 is an exploded view of a wedge set according to an embodiment of the present invention
5 is a view showing a wedge binding ring of an embodiment according to the present invention
6 is an assembled state diagram of a wedge set according to an embodiment of the present invention,
a is a plan view, b is a longitudinal sectional view
7 is a partial exploded view of FIG. 3
8 is an exploded view of the spring restraint unit of an embodiment according to the present invention
9 is a configuration diagram of a lock according to an embodiment of the present invention,
a is a cross-sectional view, b is a side view of a
10 is a cross-sectional view of a spring restraint unit of an embodiment according to the present invention
11 is a partial exploded cross-sectional view of an embodiment according to the present invention
12 is a state diagram of a reinforcing bar connection of FIG. 3
13 is a cross-sectional view of an embodiment according to the present invention
14 is a cross-sectional view of an embodiment according to the present invention

Hereinafter, an embodiment of a reinforcing bar coupler having improved assembly properties of the present invention will be described in more detail with reference to the accompanying drawings.

Reinforcing bar coupler (1) having improved assemblability according to an embodiment of the present invention, as shown in Figs. 3 to 14, a locking protrusion for gripping the reinforcing bar on the inner wall of the hollow portion where the outside of the body is tapered and the reinforcing bar can penetrate (11) A pair of wedge sets (10), which are divided into a plurality of wedge pieces (10a) so that the inner diameter of the hollow part is expandable, accommodates the wedge set (10), and the diameter of the hollow part of the wedge set is expanded and contracted. In order to elastically support the wedge set 10 and a pair of housings 20 that are coupled to each other by including a tapered portion 21 formed corresponding to the taper angle of the wedge set body and having a threaded portion 27, the Including a spring 30 installed in the housing 20,

Includes a wedge binding ring 15 that is inserted and installed on one or more of the front end surfaces of both sides of the wedge set 10, and sets the plurality of wedge pieces 10a in a circle by connecting them in a single bundle. will be.

The wedge binding ring 15 has a supporting force that allows the wedge set 10 made of a plurality of wedge pieces 10a to maintain the gap and maintain the garden arrangement and when expanding the wedge set 10 according to the insertion of reinforcing bars It is made of a material that can be elastically stretched.

The wedge binding ring 15 may be formed of spring steel.

The wedge set 10 has a ring groove 14 for inserting and installing the wedge binding ring 15 on one or more of the front end surfaces of both sides of a plurality of wedge pieces 10a, and the wedge binding ring 15 It is composed of a C-shaped ring having elasticity, and is preferably integrated with a plurality of wedge pieces 10a by inserting into the ring groove 14 of the plurality of wedge pieces and then binding treatment (see FIGS. 4 to 6).

The wedge binding ring 15 may be inserted into the ring groove 14 of the plurality of wedge pieces 10a and then attached to the wedge set by caulking treatment (see FIGS. 4 and 6 ).

The wedge binding ring 15 is preferably formed on a surface having a relatively large area, which is the front end surface 10d opposite the reinforcing bar insertion hole 10c in the wedge set 10 (see FIGS. 4 and 6).

The size of the diameter of the wedge binding ring 15 determines the size of the arrangement of the plurality of wedge pieces 10a.

Therefore, the size of the wedge binding ring 15 is preferably formed to match the size of the plurality of wedge pieces (10a) to form an inner diameter corresponding to the diameter of the reinforcing bar.

The wedge set 10 may be set such that the side of the reinforcing bar insertion port 10c is opened at an arbitrary angle (see FIGS. 4 and 6 ).

The assembly of the wedge set 10 of the above configuration is in a form in which a plurality of wedge pieces (10a) maintain a space between a gap 13 and a garden using a separate jig, and the ring groove 14 is formed. After arranging and fixing so that the cross section faces up, the wedge binding ring 15 is inserted into the ring groove 14, and the wedge binding ring 15 is subjected to a caulking treatment to fill the gap by forcibly press-fitting around the ring groove 14. It can be attached to the wedge set 10 (see Fig. 6).

At this time, the wedge pieces 10a are set to open at an arbitrary angle a toward the reinforcing bar insertion hole 10c by using a jig (see b of FIG. 6).

As described above, in the wedge set 10 to which the wedge binding ring 15 is attached, a plurality of wedge pieces 10a are fixedly coupled to the wedge binding ring 15 so that the wedge pieces 10a maintain a gap 13 with each other. While doing it, the reinforcing bars (3) of the corresponding standard are set as a single connecting bundle fixed in a garden-shaped arrangement that can be inserted.

In other words, the wedge binding ring 15 bonded to the wedge pieces 10a by a caulking treatment does not loosen unless a strong external force is applied.

Accordingly, when the wedge set 10 is inserted into the housing 20, it is inserted into a single bundle, so that the assembly is easy, and there is no fear that the wedge pieces are separately poured or the garden alignment can be broken.

In addition, as described above, by setting the wedge pieces 10a to open at an arbitrary angle toward the reinforcing bar insertion port 10c, when inserted into the housing 20, the taper inclination angle of the body of the wedge set 10 and the tapered portion 21 of the housing Because the inclination angles do not match, braking is applied during the insertion process.

At this time, when a physical force is applied to the wedge set 10, the wedge pieces 10a are released tightly with the wedge binding ring 15, and the opening angle of the wedge set is tightened by the tapered portion 21 of the housing. The wedge set 10 can stably maintain the assembled state by the spring 30 that is seated in close contact with the inner wall of the unit and is then installed.

As described above, by setting the side of the reinforcing bar insertion hole 10c in the wedge set 10 to be wide open, the wedge pieces 10a can be accurately adhered to the tapered portion 21 of the housing, thereby being positioned at an appropriate position in the housing. It is possible to provide a stable coupler assembly that is prevented from being separated from the housing, and the wedge pieces, which have been a problem in the prior art, are unstable in the housing and are unstable, and the rebar insertion hole is narrowed to less than the set diameter due to excessive movement out of the proper position. Can be prevented.

And, when the force to insert the reinforcing bar 3 is applied to the coupling 1 to which the wedge set 10 is applied, the binding of the wedge binding ring 15 to the wedge pieces 10a is completely broken, thereby binding the wedge. Elastic deformation of the ring 15 is possible, and the wedge pieces 10a are in a threaded state rather than bound to the wedge binding ring 15.

Therefore, the wedge set 10 allows for expansion deformation for reinforcing bar insertion and temporary mismatch between the wedge pieces 10a so that the reinforcing bar insertion is made smooth, and after the reinforcing bar is inserted, when the reinforcing bar is pulled in the opposite direction As the wedge binding ring 15 is restored, the wedge pieces 10a are returned to their original shape in the expanded state, and the wedge pieces 10a are tightened by the tapered portion 21 of the housing to firmly grip the reinforcing bar. Is done.

As described above, in the wedge set 10 according to the present invention, the wedge binding ring 15 having elasticity and support is fixed to the front end surface, thereby setting a plurality of wedge pieces 10a as a bundle and reinforcing bars By setting the insertion port side to open, the wedge set 10 can be accurately and closely assembled at the proper position of the housing 10, making it easy to assemble, as well as remarkably improving the quality of assembly, making it possible to provide a good quality product. .

In addition, by using one wedge binding ring 15 to set the wedge pieces 10a as a bundle and at the same time to form a garden shape that maintains the gap 13 between the wedge pieces, a separate Since the gap guide can be eliminated, the cost of parts and assembly work can be reduced.

On the other hand, at least one of the pair of housings 20 may be provided with a lock 40 for restraining the spring 30 in a compressed state (see FIGS. 3 and 7 to 13).

In order to install the locker 40, a locker fixing screw part 23 is provided in the housing 20a, and the locker 40 has a screw part 41 formed around the disk-shaped body, so that the housing 20a ) Is screwed, and a wrench hole 42 for a fastening tool may be formed in the central portion (see FIGS. 7 to 9).

In addition, in order to install the locker 40, the housing 20a is provided with a locker mounting portion including a protruding protrusion 24 for fixing the locker, and the protruding protrusion 24 is the locker 40 It can be formed so that the forced press-in of is possible and separation is prevented (see FIG. 10).

Forced press-fitting of the locker 40 may be installed by pressing and pressing the wedge set 10 and the spring 30 in a state in which the housing is erected using a separate jig.

The locker installation part is provided with a locker installation groove 25 that prevents the movement of the locker 40 from the protruding protrusion 24 formed on the inner wall of the housing 20 toward the tapered part 21. Can (see Fig. 10).

According to the above configuration, the wedge set 10 is installed in the housing 20, and after the spring 30 is inserted, the locker 40 is fixedly installed on the housing 20 to compress the spring, thereby installing the wedge set 10 in the housing. ) Is stably supported by the elasticity of the spring 30 and at the same time, the spring 30 constitutes a'spring restraint unit' 1a which is set to maintain a compressed state so as to support the wedge set 10.

The spring restraint unit (1a) is coupled between the housing (20) by the lock member (40) as described above, in a step prior to completion of the assembly, the spring (30) stably maintains the compressed state so that the wedge set (10) can be supported. And the spring 30 is not placed in a free state, so that handling and assembly of the coupler can be performed remarkably easily.

The spring restraint unit 1a provided with the locker 40 is applied only to one housing 20a in the entire coupler consisting of a pair of housings 20, and the locker 40 is applied to the other housing 20b. ) May be excluded to become a'spring free unit 1b' in which the spring 30 is placed in a free state (see FIGS. 3 and 7)

In this case, first, the spring restraint unit 1a is assembled, and the remaining spring free units 1b may be sequentially assembled.

As described above, when only one side of the pair of housings 20 becomes the spring restraining unit 1a, the housing 20b of the other side has a length 20La of the housing 20a in which the locker 40 is installed. In comparison, the length 20Lb can be reduced, and the length of the entire coupler can be reduced.

At this time, the locker 40 is located at the center of the entire coupler 1 and functions as a stopper and a reference point to prevent over-insertion when rebar is inserted, so that the insertion length of both reinforcing bars is equal, thereby improving the quality of rebar connection. Can be made (see Fig. 12).

In addition, when the pair of housings 20 are all of the spring restraining unit 1a provided with the locker 40, there is an advantage that assembly is remarkably simple because there is no spring in a free state, while the overall length of the coupler is increased. There are drawbacks (see Fig. 11).

On the other hand, the pair of housings 20 may be provided with a ♀♂-type screw portion 27 for mutual coupling, so that the thickness of the ♂-type screw portion can be reduced when combined (see FIGS. 3, 11, and 12).

In order to prevent this, one of the pair of housings 20 is provided with a space 22a and a ♀ type in which a wedge set 10, a spring 30a, a locker 40 and a spring 30b for the other side are installed. A long housing 20c having a threaded portion 27a, the other side may be composed of a short housing 20d forming a ♂-shaped threaded portion 27b having a space that can accommodate only the wedge set 10 (See Fig. 13).

The ♂-type threaded portion 27b of the short housing 20d has the advantage that it can be formed in a tapered portion having a sufficient thickness in the housing.

As an embodiment according to the present invention, a meson 50 for connecting the two housings is provided between the pair of housings 20, and the meson 50 is screwed with the pair of housings 20 , An intermediate plate 51 for pressing the spring 30 may be formed (see FIG. 14).

The configuration of the housing 20 of the above configuration can increase the consistency of parts because both of the pair of configurations are the same, and the intermediate plate 51 of the intermediate member 50 presses the springs 30 on both sides and at the same time the reference point of the insertion length Acts as

In FIGS. 7 and 8, reference numeral '22' denotes a spring installation part provided in the housing.

As described above, the reinforcing bar coupler 1 having improved assembly properties according to the present invention is provided with the wedge binding ring 15 in the wedge set 10, so that a plurality of wedge pieces 10a maintain a gap between each other. It is set as a single connecting bundle that maintains a garden-shaped arrangement, and by setting the reinforcing bar opening side open, assembly of the wedge set is remarkably simple, and the separation from the housing is prevented, and it is assembled in close contact with the appropriate position of the housing. The assembly quality can be remarkably improved, and a separate gap guide can be eliminated, reducing the cost of parts and assembly man-hours.

In addition, the wedge set 10 is stably supported by the elasticity of the spring 30 at the stage prior to the entire assembly of the coupling, and the compression state is stabilized so that the spring 30 can support the wedge set 10. The assembly of the coupler is remarkably simple as the lock to be held is fixed in the housing.

In the above, the present invention has been described with reference to several examples, but it is not limited thereto, and whatever can be reasonably interpreted from the scope of the present invention, it is natural to fall within the scope of the present invention.

1: Rebar coupler with improved assembly properties of the present invention
1a: spring restraint unit of the present invention
10: wedge set 10a: wedge piece 14: ring groove
15: wedge binding ring 20: housing 21: tapered portion
23: threaded portion 24: protruding jaw 30: spring
40: locker 41: threaded portion 42: wrench hole
50: meso 3: rebar

Claims (9)

A pair of wedge sets that are divided into a plurality of wedge pieces (10a) so that the outer diameter of the body is tapered and a locking protrusion (11) for gripping the reinforcing bar is provided on the inner wall of the hollow part through which the reinforcing bar can penetrate. (10);
A pair of accommodating the wedge set 10, including a tapered portion 21 formed corresponding to the taper angle of the wedge set body so that the diameter of the hollow portion of the wedge set is expandable and contractible, and having a threaded portion 27 to be coupled to each other Housing 20; And
Including; a spring 30 installed in the housing 20 to elastically support the wedge set 10,
It is inserted into the front end surface of the wedge set 10 in the direction opposite to the entry of the reinforcing bar, and includes a wedge binding ring 15 for setting the plurality of wedge pieces 10a by arranging and connecting them in a circle shape,
The wedge set 10 is formed with a ring groove 14 for inserting and installing the wedge binding ring 15 at the front end surface of the plurality of wedge pieces 10a in the direction opposite to the reinforcing bar entry,
The wedge binding ring (15) is composed of a C-shaped ring having elasticity, and is inserted into the ring groove (14) of the plurality of wedge pieces and is then bonded to be integrated with a plurality of wedge pieces (10a). Improved rebar coupler. delete The method according to claim 1,
The wedge binding ring (15) is a reinforced coupler with improved assembly, characterized in that after being caulked after being inserted into the ring groove (14) of the plurality of wedge pieces (10a). The method according to claim 1,
The wedge set 10 is a reinforcing bar coupler with improved assemblability, characterized in that the reinforcing bar insertion port 10c is set to open at an arbitrary angle. The method according to claim 1,
Reinforced coupler with improved assembly, characterized in that at least one of the pair of housings (20) is provided with a lock (40) for restraining the spring (30) in a compressed state. The method of claim 5,
In order to install the locker 40, the housing 20a is provided with a locker fixing screw,
The locker 40 has a threaded portion 41 formed around the disk-shaped body and is screwed to the housing 20a, and a wrench hole 42 for a fastening tool is formed in the central portion thereof, thereby improving assembling property. Rebar coupler. The method of claim 5,
In order to install the locker 40, the housing is provided with a locker installation portion including a protrusion 24 for fixing the locker,
The protruding jaw (24) is a reinforced coupler with improved assembly, characterized in that it is formed so that the locking member (40) can be forced in and prevented from being separated. The method of claim 5,
The pair of housings 20 are provided with a ♀♂-type threaded portion 27 for mutual coupling,
One of the pair of housings 20 is provided with a space (22a) in which a wedge set, a spring (30a), a locker (40) and a spring (30b) for the other side are installed, and a ♀-type threaded part (27a). A reinforced coupler with improved assembly, characterized in that it is composed of a long housing 20c, a short housing 20d having a space capable of accommodating the wedge set 10 and a ♂-type threaded portion 27b. The method according to claim 1,
A meson 50 connecting the two housings is provided between the pair of housings 20,
The meson 50 is screwed with the pair of housings 20, and an intermediate plate 51 for pressing the spring 30 is formed.

Images