KR20180048145A - Coupling apparatus for threaded reinforcing bar and coupling method thereof - Google Patents

Abstract

The present invention relates to a coupling apparatus of screw reinforcing bars, and a coupling method thereof. The coupling apparatus of screw reinforcing bars according to the present invention comprises: a coupler having a female screw unit to enable the screw reinforcing bars to be screwed to both end portions; and an elastic member disposed in the coupler and coming in contact with each of the end portions of the screw reinforcing bars inserted into the both end portions of the coupler to apply an elastic force to each of the screw reinforcing bars in the opposite direction to the inserting direction of the screw reinforcing bars. Accordingly, when the screw reinforcing bars are coupled, slipping of a screw unit can be suppressed.

Description

TECHNICAL FIELD [0001] The present invention relates to a coupling device for screw reinforcement,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a joint device for a screw reinforcement and a jointing method therefor.

As is well known, steel reinforcement refers to reinforcing bars used in reinforced concrete, and is divided into a circular reinforcing bar and a deformed reinforcing bar.

The circular reinforcing bar refers to reinforcing bars having no nodule on the surface of the reinforcing bars, and the deforming reinforcing bars refer to reinforcing bars having nodules and ribs on the outer surface.

Because of the limitations of construction methods and production specifications, these rebars are often required to be connected (connected) to reinforcing bars at the construction site.

As a method of joining a reinforcing bar, a lap joint, a gas pressure welding, a welded joint, and a mechanical joint method are used.

The lap joint has a disadvantage in that the material consumption is large and the mechanical strength is low.

The gas pressure welding and welded joints may cause thermal deformation, and quality variations may occur depending on the skill of the operator.

Mechanical rebar joining methods have recently been increasing in use because they can be easily constructed and maintained in quality using a mechanical reinforcing joint.

On the other hand, in recent years, the use of screw reinforcing bars having threaded nodules on the surface of reinforcing bars has been increasing.

A method using a screw-type reinforcing bar coupling (a coupler, an anchorage fitting) provided with a female thread so as to be screwed into a screw thread of a screw reinforcement is used as a method of joining the screw reinforcement.

However, in such a conventional screw reinforcement joint (coupler, fixture), a slip phenomenon occurs due to a dimensional deviation of the screw reinforcement during and / or after the tightening of the screw reinforcement and the screw reinforcement of the screw reinforcement There is a problem that the fastening force is lowered.

Further, in such a conventional coupling device (coupler, fixing port) of a screw bar reinforcement, an additional operation (for example, mortar insertion or a separate component (lock nut) tightening) must be performed so as to suppress the slip phenomenon , There is a problem that the working time is extended and the cost is increased.

KR 10-2015-0096554 A (2015.08.25.) KR 10-2014-0046308 A (April 4, 2014). KR 10-1249129 B1 (2013.04.02.)

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a joining apparatus of a screw bar and a joining method therefor, in which the occurrence of a slipping phenomenon of a threaded portion can be suppressed in the case of joining screwed bars.

Another object of the present invention is to provide a threaded reinforcement device and a jointing method thereof, which can shorten the working time and suppress the cost increase by eliminating the additional work.

In order to achieve the above-mentioned object, the present invention is characterized by comprising: a coupler having a female screw part so that screw rods are screwed to both ends; And an elastic member provided inside the coupler and contacting each end of the screw reinforcement inserted into both ends of the coupler to apply an elastic force to each of the screw reinforcements in a direction opposite to the insertion direction of the screw reinforcement To provide a threaded reinforcing bar joint.

According to an embodiment of the present invention, the elastic member is constituted by a spring washer.

The elastic member may include a ring-shaped body and a plurality of elastic protrusions that protrude axially from at least one side of an inner side surface and an outer side surface of the body and are circumferentially spaced apart from each other.

According to an embodiment of the present invention, the coupler is provided with a through hole capable of observing the elastic member.

According to one embodiment of the present invention, the outer diameter of the elastic member is smaller than the outer diameter of the reinforcing bar by a predetermined value.

According to another aspect of the present invention, there is provided a connector comprising: a coupler having a female threaded portion so that screw rods can be screwed to both ends thereof; and a screw thread portion provided in the coupler and inserted into both ends of the coupler, Providing an elastic member for applying an elastic force in a direction opposite to the insertion direction of the screw reinforcement; Coupling the elastic member to the inside of the coupler; And coupling the threaded reinforcing bars to the coupler.

According to still another aspect of the present invention, there is provided a fixing device comprising: a fixture having a female screw so that a screw thread can be screwed; And an elastic member which is provided in the fixing port and contacts an end portion of the screw reinforcement inserted into the fixing fixture and applies an elastic force in a direction opposite to the insertion direction of the screw reinforcement, do.

According to an embodiment of the present invention, the fixing member includes: a body having a cylindrical shape and having the female screw portion formed on an inner surface thereof; And a flange extending outwardly along a radial direction at one end of the body.

The flange may have a through-hole formed at the center thereof so as to communicate with the inside and the outside.

According to another aspect of the present invention, there is provided a fixing device comprising: a fixing port provided with a female screw so that a screw reinforcement can be screwed into the fixing screw; and an end of the screw reinforcement, Providing an elastic member for applying an elastic force in a direction opposite to an insertion direction of the screw reinforcement; Inserting the elastic member into the fixture; And screwing the fixture and the screw reinforcement so that the elastic force of the elastic member is applied to the fixture and the screw reinforcement.

As described above, according to the embodiment of the present invention, the occurrence of the slip phenomenon of the threaded portion of the screw reinforcement can be suppressed by providing the elastic member that applies the elastic force in the direction opposite to the direction of insertion of the screw reinforcement.

Further, it is possible to exclude an additional operation for suppressing the slip occurrence of the threaded portion of the screw reinforcement after the screw reinforcement is engaged, thereby shortening the working time.

Further, it is possible to exclude an additional work for suppressing the slip occurrence of the threaded portion of the screw reinforcement after the screw reinforcement is engaged, thereby suppressing the cost increase due to the additional work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a use state of a screw reinforcement according to an embodiment of the present invention;
Fig. 2 is a sectional view of Fig. 1,
Fig. 3 is a perspective view of the elastic member of Fig. 1,
Fig. 4 shows a modification of the elastic member of Fig. 1,
Fig. 5 is a side sectional view of Fig. 4,
6 shows a modification of the elastic member of Fig. 1,
Fig. 7 is a side sectional view of Fig. 6,
8 is a view for explaining a method of joining a screw bar according to an embodiment of the present invention;
9 is a view showing a state of use of a coupling device of a screw bar according to another embodiment of the present invention,
10 is a sectional view of Fig. 9,
11 is a view for explaining a method of joining a screw reinforcement according to another embodiment of the present invention.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. In this specification, the same or similar reference numerals are given to the same or similar components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

As shown in FIGS. 1 and 2, a screw-type reinforcing bar joint according to an embodiment of the present invention includes a coupler (not shown) having a female screw portion 134 so that screw rods 110 are screw- (130); And the screw reinforcement 110 is installed in the coupler 130 and contacts each end of the screw reinforcement 110 inserted into both ends of the coupler 130, And an elastic member 160 for applying an elastic force in a direction opposite to the insertion direction of the elastic member 160.

The threaded reinforcing bar 110 may include an annular body 112 and a male thread portion 114 projecting spirally on the outer surface of the body 112.

For example, the threaded reinforcing bar 110 may be provided with cutouts 116 cut out on both sides of the body 112.

The coupler 130 may be formed in a cylindrical shape such that the screw reinforcement 110 is inserted into the coupler 130, for example.

Reinforcing bars 136 may be formed at both ends of the coupler 130 to allow the screw reinforcement 110 to be inserted.

The inner thread of the coupler 130 may be provided with a female screw portion 134 so that the threaded portion 114 of the threaded reinforcing bar 110 may be screwed.

The female screw portion 134 may be formed over the entire length of the coupler 130, for example.

A tool engaging portion 137 may be provided on an outer surface of the coupler 130 so that a tool can be engaged when the screw reinforcement 110 is engaged.

The tool engaging portion 137 may be configured to have, for example, a flat surface 139 so as to be in surface contact with the tool.

The tool engaging portion 137 includes a first engaging portion 138a and a second engaging portion 138b spaced from each other in the axial direction so as to be close to the screw reinforcement 110 inserted into both ends of the coupler 130, 2 coupling portion 138b.

3, the elastic member 160 includes a body 162 having a ring-shaped base material made of spring steel and both ends 164 of the body 162, Called " spring washer "

The elastic members 170 and 180 include a ring-shaped body 172 and a plurality of circumferentially spaced elastic protrusions 182 protruding axially from at least one side of the inner side surface and the outer side surface of the body 172 174, 184).

4 and 5, the elastic member 170 includes a ring-shaped body 172 and a ring 172 that protrudes axially from the inner surface of the body 172 and is circumferentially spaced apart And a plurality of inner protrusions 174 formed on the inner circumferential surface.

6 and 7, the elastic member 180 includes a ring-shaped body 172 and a plurality of circumferentially spaced outer protrusions 181 protruding axially from the outer surface of the body 172, (184).

The elastic member includes a ring-shaped body 172, a plurality of inner protrusions 174 protruding in the axial direction from the inner surface of the body 172 and circumferentially spaced apart from each other, And a plurality of circumferentially spaced outer protrusions 184 protruding in the axial direction from the outer surface of the body 172 at the same time.

The outer diameter D2 of the elastic member 160 may be smaller than the outer diameter D1 of the screw reinforcement 110 by a predetermined value.

The outer diameter D2 of the elastic member 160 may be about 1 to 2 mm smaller than the outer diameter D1 of the threaded reinforcing bar 110, for example.

Accordingly, the elastic member 160 can be easily inserted into or drawn out from the coupler 130.

Meanwhile, the coupler 130 may include a penetration portion 139 penetrating through the coupler 130 so as to observe the inside thereof.

The penetration portion 139 may be formed in the central region of the coupler 130, for example.

This makes it possible to observe the elastic members 160 disposed between both ends of the screw reinforcement 110 inserted at both ends of the coupler 130 and both ends of the screw reinforcement 110.

According to this configuration, the screw reinforcement 110 inserted into both ends of the coupler 130 can be prevented from being disposable to one side with respect to the center of the coupler 130.

In addition, it can be observed that the elastic members 160 elastically support both ends of the screw reinforcement 110.

The through-hole 139 may be formed as a long hole having a long length in the axial direction, for example.

Also, when the concrete is inserted after the threaded reinforcing bar 110 is joined, the concrete may be introduced through the penetration portion 139, so that the coupling between the concrete and the coupler 130 can be promoted.

Further, after the connection of the screw reinforcement 110, a separate grouting agent may be injected (filled) through the penetration portion 139 before the concrete is poured.

In the meantime, the method of joining a screw-type reinforcing bar according to an embodiment of the present invention includes a coupler 130 having a female screw portion 134 so that screw rods can be screwed to both ends of the coupler 130, (S110) of providing an elastic member (160) for applying an elastic force to the screw reinforcement (110) inserted in both ends of the coupler (130) in a direction opposite to the insertion direction of the screw reinforcement (110) ; Inserting the elastic member 160 into the coupler 130 (S120); And coupling the screw reinforcement 110 to the coupler 130 (S130).

More specifically, the coupler 130 may be disposed between both ends of the screw reinforcement 110 to be connected, and the elastic member 160 may be inserted into the coupler 130.

The elastic member 160 may be disposed in the central region of the coupler 130 through the penetration portion of the coupler 130.

When the coupler 130 and the screw reinforcement 110 are rotated relative to each other, the screw reinforcement 110 can be inserted into the coupler 130.

When the screw reinforcements 110 at both ends of the coupler 130 are inserted at predetermined depths, the elastic member 160 can be contacted.

The elastic member 160 elastically applies the elastic force of the ends of the screw reinforcement 110 on both sides to the direction opposite to the inserting direction so that the outer surface of the screw groove of the female screw portion 134 of the coupler 130, It is possible to suppress the slip phenomenon between the female threaded portion 134 and the male threaded portion 114 by making the outer side surfaces of the male threaded portion of the female threaded portion 110 come into tight contact with each other.

9 to 11, a description will be given of a joint of a screw reinforcement and a jointing method thereof according to another embodiment of the present invention.

9 and 10, the screw-type reinforcing bar of the present embodiment includes a fixing port 210 having a female screw portion 214 so that the screw reinforcement 110 can be screwed into the fixing hole 210; And elasticity that is provided in the fixing port 210 and contacts an end portion of the screw reinforcement 110 inserted into the fixing port 210 so as to exert an elastic force in a direction opposite to the insertion direction of the screw reinforcement 110, And a member (160).

Typically, the fixing member 210 is formed to have a cross-sectional area larger than that of a reinforcing bar (screw reinforcement 110) and embedded in the concrete to fix the reinforcing bars to the concrete structure.

The fixing member 210 includes, for example, a body 212 having a cylindrical shape and having the internal thread portion 214 formed on an inner surface thereof; And a flange 216 extending outward along the radial direction at one end of the body 212.

The fixture 210 may be provided with a tool engaging portion 217 having a plurality of flat surfaces 218 so that a tool can be engaged, for example.

The tool engaging portion 217 may be formed on the outer surface of the body 212, for example.

The tool engagement portion 217 may be formed on one side of the flange 216, for example.

An elastic member 160 for applying an elastic force to the end of the screw reinforcement 110 screwed to the fixture 210 in the direction of insertion of the screw reinforcement 110 is provided in the fixture 210 .

As a result, the outer surface of the threaded groove of the female threaded portion 214 of the fixing port 210 and the outer surface of the male threaded portion 114 of the screwed reinforcement 110 are tightly adhered to each other, The occurrence of the slip phenomenon between the screw portions 114 can be suppressed.

The elastic member 160 may be configured to have an outer diameter D2 formed to be smaller than the outer diameter D1 of the screw bar 110 by a preset value, for example.

The outer diameter D2 of the elastic member 160 may be 1 to 2 mm smaller than the outer diameter D1 of the threaded reinforcing bar 110, for example.

In this embodiment, the elastic member 160 is embodied in the form of a spring washer as shown in FIG. 3, but this is merely an example. Like the embodiment described above with reference to FIGS. 4 to 7, A ring-shaped body 172, an inner protrusion 174 protruding from the inner surface of the body 172, and / or an outer protrusion 184 protruding from the outer surface of the body 172, It is possible.

The flange of the fixation port 210 may be provided with a penetration part 222 penetrating to allow the inside and the outside of the fixture to communicate with each other.

Accordingly, it is possible to observe the elastic member 160 inserted into the fixing hole 210.

The penetration portion 222 may be formed to have a size smaller than the outer diameter of the elastic member 160, for example.

The penetration portion 222 may be formed to have a size capable of sufficiently supporting one side of the elastic member 160, for example.

In this embodiment, a case where the penetrating portion is formed as one is illustrated, but this is merely an example, and the penetrating portion may have a plurality of through holes.

For example, in the case where the through-hole has a plurality of through-holes, a part of the plurality of through-holes may be formed at a position where the elastic member 160 can be observed.

In addition, after the connection of the fixing port 210 and the screw reinforcement 110, concrete may be introduced through the penetration part 222 when the concrete is poured.

As a result, the coupling between the fixing port 210 and the concrete can be enhanced.

Also, since the concrete introduced into the coupler 130 maintains the initial state in which the male screw portion 114 and the female screw portion 214 are tightly adhered to each other and hardens, the male screw portion and the female screw portion 214 214) can be maintained as they are.

In addition, an additional grouting agent may be injected into the interior of the fixing unit 210 through the penetration unit 222 before the concrete is poured.

As shown in FIG. 11, the method of joining a screw reinforcement according to another embodiment of the present invention includes a fixing port 210 having a female screw portion 214 so as to be screwed to a screw reinforcement 110 And an end portion of the screw reinforcement 110 inserted into the fixture 210 and inserted into the screw fixture 210 so that the direction of insertion of the screw reinforcement 110 into the screw reinforcement 110 (S210) of providing an elastic member (160) for applying an elastic force in the opposite direction; (S220) inserting the elastic member (160) into the fixing hole (210); And a step S230 of screwing the fixing hole 210 and the screw reinforcement 110 so that an elastic force of the elastic member 160 acts on the fixing hole 210 and the screw reinforcement 110 can do.

More specifically, the coupler 130 may be disposed on one side of the end of the screw reinforcement 110 to be coupled, and the elastic member 160 may be inserted into the coupler 130.

The elastic member 160 inside the fixing hole 210 can be identified through the penetration part 222.

When the elastic member 160 is confirmed, the end of the screw reinforcement 110 may be relatively rotated to be inserted into the fixing hole 210.

When the end of the screw reinforcement 110 is inserted into the fixing hole 210 at a predetermined depth, the elastic member 160 can be contacted.

The elastic member 160 is pressed against the end of the threaded reinforcing bar 110 which is relatively moved to accumulate the elastic force and can press the screwed reinforcing bar 110 in the direction opposite to the insertion direction by the accumulated elastic force.

As a result, the outer surface of the threaded groove of the female threaded portion 214 of the fixing port 210 and the outer surface of the male threaded portion 114 of the screwed reinforcement 110 are tightly adhered to each other, Occurrence of slip phenomenon between the threaded portions 114 can be suppressed.

Meanwhile, when concrete is poured around the fixing port 210, the concrete flows into the fixing port 210 through the penetrating part, so that the connection between the fixing port 210 and the concrete can be secured.

Also, since the concrete introduced into the interior of the fixture 210 hardens in an initial state in which the male screw portion 114 and the female screw portion 214 are tightly adhered to each other, even if the time passes, the male screw portion 114 and the female screw portion 214) can be maintained as they are.

The foregoing has been shown and described with respect to specific embodiments of the invention. However, the present invention may be embodied in various forms without departing from the spirit or essential characteristics thereof, so that the above-described embodiments should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: screw reinforcement 112,162,172,212: body
130: Coupler 134, 214: Female thread portion
137, 217: tool engaging portion 139, 218: flat surface
139, 222: through part 160, 170, 180:
210: anchorage

Claims (12)

A coupler having a female screw so that screw rods can be screwed on both ends; And
And elastic members provided inside the coupler and respectively contacting the end portions of the screw reinforcement inserted into both ends of the coupler and applying elastic force to each of the screw reinforcement in a direction opposite to the insertion direction of the screw reinforcement, Joint of screw reinforcement. The method according to claim 1,
Wherein the elastic member comprises a spring washer. 3. The method of claim 2,
Wherein the elastic member comprises a ring-shaped body and a plurality of elastic protrusions projecting axially from at least one side of an inner side surface and an outer side surface of the body and circumferentially spaced apart from each other. The method according to claim 1,
Wherein the coupler is provided with a through hole capable of observing the elastic member. 5. The method according to any one of claims 1 to 4,
Wherein an outer diameter of the elastic member is smaller than an outer diameter of the reinforcing bar by a predetermined value. An elastic member which is provided inside the coupler and applies elastic force to the screw reinforcement inserted into both ends of the coupler, in a direction opposite to the direction of insertion of the screw reinforcement, ;
Coupling the elastic member to the inside of the coupler; And
And screwing the screw reinforcement to the coupler. A fixture having a female screw so as to be screwed into the screw reinforcement; And
And an elastic member provided inside the fixation port and contacting an end of the screw reinforcement inserted into the fixation hole to apply an elastic force to the screw reinforcement in an axial direction. 8. The method of claim 7,
Wherein the elastic member is a spring washer. 9. The method of claim 8,
Wherein the elastic member comprises a ring-shaped body and a plurality of elastic protrusions projecting axially from at least one side of an inner side surface and an outer side surface of the body and circumferentially spaced apart from each other. 10. The method according to any one of claims 6 to 9,
Wherein the fixing unit comprises: a body having a cylindrical shape and having the internal thread portion formed on an inner surface thereof; And a flange extending outwardly along a radial direction at one end of the body. 11. The method of claim 10,
And a through hole penetrating through the flange so as to communicate with the inside and outside of the flange is formed at the center of the flange. A fixing member having a female screw so as to be screwed into the screw reinforcement, and a fixing member provided in the fixing member and contacting the end of the screw reinforcement inserted into the fixing fixture, Providing an elastic member for applying an elastic force;
Inserting the elastic member into the fixture; And
And screwing the fixing hole and the screw reinforcement so that an elastic force of the elastic member is applied to the fixing fixture and the screw reinforcement.

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