KR101384789B1 - Iron-bar coupler having screwless and screw - Google Patents

Abstract

The present invention relates to a rebar coupler having a screwless part and a screw part, tightly binding a binding device and a second connector by screwed the same in all parts after inserting and combining the screwless part (or screw part) of the binding device with the screw part (or screwless part) of the second connector, as a result thereby configuring the rotation operation of the binding device very quickly and simply so that the rebar coupler can improve productivity. According to the present invention, the rebar coupler having the screwless part and the screw part connects a first reinforcing bar and a second reinforcing bar (1,2) shaped in a helical and provides a first reinforcing bar connection part (11) and a second reinforcing bar connection part (21).

Description

Reinforcing bar coupler with no thread and a thread {IRON-BAR COUPLER HAVING SCREWLESS AND SCREW}

The present invention relates to a reinforcing bar coupler, and more particularly, to a reinforcing bar coupler having a threaded portion and a threaded portion capable of connecting a reinforcing bar by simply and quickly manipulating two reinforcing bars in a straight line.

The reinforced concrete structure is a structure in which concrete bears compressive force and rebar bears tensile force, and is made by combining steel with concrete. Concrete can be installed integrally because the formwork is installed and poured, but the reinforcing bar must be constructed by continuing the standard product of a certain length, the joint between the reinforcing bar and the reinforcing bar is bound to occur.

Therefore, in order for the reinforcing bar to sufficiently resist the required tensile force, the reinforcing bar and the reinforcing bar should be closely connected to each other. For this purpose, a method of using overlapped joints, pressure welding or reinforcing bar fittings is generally used.

Overlapping joints are reinforced with reinforcing bars and reinforcing bars over the length of the joint and tied with a binding line, which makes it easier to work with reinforcing bars. However, when the diameter of the reinforcing bars is large, there are problems of structural strength due to eccentricity and thin concrete members. Due to the overlap of the reinforcing bars, the cross-section of the formwork is narrowed, there is a problem that concrete pouring is not easy. In addition, it is difficult to control the length of rebar joints in the field, which leads to the occurrence of defects due to insolvency work. In the case of reinforcing bars having a large diameter, reinforcing bars having a certain length or less can not be used, There is a problem of.

Reinforcing bar connection method by pressing is a method of integrally forming the end by heating and pressing after connecting the end of the reinforcing bar and the reinforcing bar.

However, welding is not easy to apply because there are many problems such as long working time, excessive cost and risk of fire.

In order to solve the above problem, a method of mechanically combining a reinforcing bar with a reinforcing bar has been devised. As a mechanical reinforcing bar joining method, there are a method of screwing a reinforcing bar directly, a method of joining a screw coupling, , And a method of connecting with a coupler.

The present invention relates to a method of connecting a helical reinforcing bar to a coupler, and only a description related to the present invention will be described below.

Conventional couplers include lid type, screw type, and the like. Cover type wraps two rebars with two semicircular cover pieces, and a method of fastening nuts thereto is common, and workability is inferior because two nuts must be rotated several times.

On the other hand, in the cutting process of the reinforcing bars, burrs are generated in the cut portions, and the deformations (e.g., deformations of the end portions of the reinforcing bars are deformed into elliptical shapes) are generated in the rolling process so that the reinforcing bars are screwed into the binding holes I can not.

In consideration of this point, the thread of the connecting rod is made larger than the thread of the reinforcing bar, so that even if the burr is generated or the outer shape is deformed, the reinforcing bar can be screwed to the connecting rod. However, There is a problem that the reinforcing bars move inside the binding claws by the gap.

In order to solve such a problem, there is a reinforced coupler patented by the present applicant.

As a couple patented by the present applicant, Patent No. 10-1123347 is a coupler for binding the first and second reinforcing bars, and after coupling the coupler to the first rebar, for example, the first and second reinforcing bars are joined together. By screwing the coupler toward the second reinforcing bar, the coupler is configured to bind the first and second reinforcing bars by the coupler, but it is possible to solve the above-mentioned problems of the prior art, but it is necessary to turn the coupler for a long time so that workability There is a problem falling.

Registration No. 10-1123347 Patent No. 10-1187379 Patent No. 10-1187380

The present invention is to solve the problems as described above, using the binding sphere to bind the first and second connectors screwed to the first and second reinforcing bars, the binding sphere is connected to the connector even if only a few turns of the binding sphere An object of the present invention is to provide a rebar coupler having a threadless portion and a threaded portion for screwing.

The rebar coupler having a threadless portion and a threaded portion according to the present invention respectively connects the first and second rebars in a spiral shape, and includes a first connector screwed to a joint portion of the first rebar and a joint portion of the second rebar. The first connector is screwed to the inner circumferential surface of the tapered cross-section, the second connector is connected to the screw, the first and second connectors, the first connector is tapered in the outer diameter is reduced toward one side A first reinforcing bar coupling part is provided, and the second connector has a cylindrical shape having a fastening part formed on an outer circumferential surface thereof, and a second reinforcing bar coupling part for screwing the second rebar to an inner circumferential surface thereof, and the binding port is tapered on one side of the inner circumferential surface thereof. The first and second reinforcing bars are formed by being cross-sectioned so that the first connector is fitted and the fastening part is formed on the other side of the inner circumferential surface and is screwed to the second connector. Engage the combined first and second connectors, wherein the fastening portion of the second connector is continuous with the first screw portion and the screw portion of the first screw portion formed alternately along the circumferential direction, and the circumferential direction is formed. The second fastening portion is formed as a whole, and the fastening portion of the fastener is continuous with the third fastening portion, the third fastening portion formed by alternately repeating the threadless portion and the screw portion along the circumferential direction, and generally along the circumferential direction. Comprising a fourth fastening portion formed with a threaded portion, the threaded portion or threaded portion of the third fastening portion of the fastening port is fitted to the threaded portion or the non-threaded portion of the first fastening portion of the second connector, and then the fastening hole is connected to the second connector by screwing. It is characterized in that the screw coupled to.

According to the reinforcing bar coupler having a threadless portion and a threaded portion according to the present invention, the threaded portion (or threaded portion) of the binding sphere is fitted to the threaded portion (or threadless portion) of the second connector, and then the binding sphere is rotated only once or three times. The second connector is screwed in all parts and is firmly bound. As a result, the rotation of the fastener can be made very quickly and easily, thereby improving productivity.

In addition, when it is necessary to change the reinforcing bars and couplers when connecting the reinforcing bars, it is possible to make the reinforcing bars even if the reinforcing bars are cut immediately at the construction site And workability of the coupler can be improved.

In addition, according to the seismic design has increased the joint strength (length, etc.) of the reinforcing bar, there is an advantage that can easily change the length of the coupler to satisfy the seismic design at low cost.

1 is a perspective view of a coupled state of a rebar coupler having a threadless portion and a screw portion according to the present invention.
2 is an exploded perspective view of a rebar coupler having a threadless portion and a screw portion according to the present invention.
3 is a longitudinal sectional view of a rebar coupler having a threadless portion and a threaded portion according to the present invention.
Figure 4 is an exploded view of the second connector and the binding port applied to the rebar coupler having a threadless portion and a screw portion according to the present invention.
5 is an operational state diagram of a rebar coupler having a threadless portion and a screw portion according to the present invention.

As shown in Figures 1 to 3, the rebar coupler 100 having a threadless portion and a threaded portion according to the present invention, respectively, is a spiral first and second reinforcing bars (1,2) (reinforced bars having a thread on the outer peripheral surface as a whole, or The first connector 10 is screwed to the first reinforcing bar 1, the second connector is screwed to the second reinforcing bar (2) by connecting the threaded portion, etc.) 20), the binding holes 30 for binding the first and second connectors 10 and 20 coupled to the first and second reinforcing bars 1 and 2, respectively.

The first connector 10 is provided with a spiral first reinforcing bar (11) (helical mountain and valley continuous form) so that the first reinforcing bar 1 is screwed on the inner peripheral surface, the binding with the binding port 30 For the conical shape is provided with a tapered portion 12 having a larger cross-sectional area toward one side.

The second connector 20 has a cylindrical shape, and is provided with a spiral second reinforcing bar portion 21 (a spiral mountain and valley continuous form) such that the second rebar 2 is screwed to the inner circumferential surface thereof. A fastening portion 22 is formed on the outer circumferential surface for binding with the 30.

The binding port 30 is provided with a taper portion 31 on one side of the inner circumferential surface to bind the first connector 20, and a fastening portion 32 is formed on the other side of the inner circumferential surface to be screwed to the second connector 30. . That is, when the first and second connectors 10 and 20 are coupled to the first and second reinforcing bars 1 and 2, the binding holes 30 are screwed into the second connector 20. Screwed to the second connector 20, at this time, the second connector 20 pushes the first connector 10, the first connector because it is the tapered cross section of the binding hole 20 and the first connector 10 10, the binding port 30 and the second connector 20 are integrated.

If the threaded portion of the second connector 20 is processed short, it can be bound without turning the binding holes 30 a plurality of times. However, in this case, the binding force of the first and second reinforcing bars 1 and 2 is weak, so that the first and second reinforcing bars 1 2, the joint is broken and can not withstand the fatigue test, the present invention, while increasing the binding strength of the second connector 20 and the binding port 30, even if only a few turns of the binding port 30, the second connector ( The fastening part 22 of the second connector 20 and the fastening part 32 of the fastening hole 30 are configured as follows so as to be bound to 20).

The fastening part 22 of the second connector 20 is divided into a first fastening part 23 and a second fastening part 24 which are sequentially formed from the end along the longitudinal direction.

The first fastening portion 23 is formed by alternately repeating two or more unthreaded portions 23a and screw portions 23b alternately along the circumferential direction.

The second fastening portion 24 is composed of a screw portion which is continuous with the screw portion 23b of the first fastening portion 23 and is formed entirely along the circumferential direction.

The fastening part 32 of the binding tool 30 is divided into the third fastening part 33 and the fourth fastening part 34 which are sequentially formed from the end part along the longitudinal direction.

Each of the third fastening portions 33 is formed by alternately repeating two or more threads (33 each in the drawing) of the threadless portion 33a and the screw portion 33b alternately along the circumferential direction.

The fourth fastening portion 34 is composed of a screw portion which is continuous with the screw portion 33b of the third fastening portion 33 and is formed entirely along the circumferential direction.

FIG. 4 is a view illustrating the second connector 20 and the binding port 30 each having a cylindrical shape to show the fastening portion 22 of the second connector 20 and the fastening portion 32 of the binding hole 30. .

According to such a structure, the screwless part 33a (or the screw part 33b) of the binding tool 30 is matched with the screw part 23b (or the threadless part 23a) of the 2nd connector 20, and the binding tool 30 is carried out. ), And after fitting, turning the fastening hole 30, the screw part 33b of the third fastening part 33 of the fastening device 30 and the second fastening part 24 of the second connector 20 are screwed together. Then, the fourth fastening portion 34 of the binding tool 30 and the threaded portion 23a of the first fastening portion 23 of the second connector 20 are screwed.

According to such a configuration, the threadless portion 33a (or the screw portion 33b) of the binding tool 30 and the threaded portion of the second connector 20 for fitting the binding tool 30 to the second connector 20. (23b) (or the threadless portion 23a) must be aligned, and it will not be easy to fit them because the third fastening portion 33 of the binding port 30 is not visible from the outside, and the display portions 25 and 35 to solve this problem. ) Is configured.

The display portions 25 and 35 correspond to, for example, the threadless portion 33a of the binding hole 30 and the threaded portion 23b of the second connector 20 (which may be reversed), and include grooves, protrusions, printing, Various methods such as taping are possible.

On the other hand, the present invention, even if there is a gap between the threaded portion of the first and second reinforcing bars (1,2) and the threaded portion of the first and second connectors (10,20) due to production error (including burr), etc. The first and second coil springs 40 and 50 are applied to firmly bind the first connector 10, the second rebar 2, and the first connector 20.

The first and second coil springs 40 and 50 are interposed between the first and second connectors 10 and 20 and the first and second reinforcing bars 1 and 2 and are elastically deformed by their own elastic force so that the first connector 10 ) And the first reinforcing bar (1), the second connector 20 and the second reinforcing bar (2).

That is, it is preferable that the first and second coil springs 40 and 50 have a cross-sectional size larger than the gap between the peaks of the first and second reinforcing bars 1 and 2 and the peaks of the first and second connectors 10 and 20. .

In addition, the first and second coil springs 40 and 50 may have a structure having a uniform diameter as a whole, but the first spiral part and the first smaller than the diameter of the bone of the first and second reinforcing bars 1 and 2 for a more solid binding. A structure in which at least two of the second spiral portion equal to the diameter of the valley of the first and second reinforcing bars 1 and 2 and the third spiral portion having an outer diameter larger than the inner diameter of the valley of the first and second connectors 10 and 20 are formed. Is preferred.

That is, the first and second coil springs 40 and 50 having such a structure are elastically deformed and pressurized and fixed to the first and second reinforcing bars 1 and 2 and the first and second connectors 10 and 20. Each of the first to third helixes is formed by its elastic force by having each node inserted between two adjacent threads of the first and second connectors 10 and 20 together with the threads of the first and second rebars 1 and 2. The threads of the first and second reinforcing bars 1 and 2 are fixed to the threads of the first and second connectors 10 and 20.

The first and second coil springs 40 and 50 may have a diameter in which two or more of the first to third spiral portions are stepped, or may be configured to gradually increase in diameter from one end to the other end.

Although not specifically described in the present invention, a jig groove (or protrusion) may be formed on the outer circumferential surface of the binding hole 30 to turn the binding hole 30 with a tool, and a concrete filling hole may be filled therein. Concave-convex portion and the like can be formed for binding with.

Referring to Figure 5 will be described the operation of the rebar coupler having a threadless portion and a screw portion according to the present invention.

The first connector 10 is coupled to the end of the first rebar 1 together with the first coil spring 40, and the second connector 20 is coupled to the end of the second rebar 2. ) Together. At this time, the binding port 30 is coupled to the first reinforcing bar 1 due to the connection structure between the binding port 30 and the first connector 10.

After joining the ends of the first and second reinforcing bars 1 and 2, the binding port 30 is moved toward the second connector 20 to bind the first and second connectors 10 and 20 to the binding port 30. do. At this time, the binding port 30 is moved horizontally without turning.

In order to couple the binding tool 30 to the second connector 20, for example, the operation of matching the threadless portion 33a of the binding tool 30 with the screw 23b of the second connector 20 is necessary (Fig. 5, A).

In this manner, after matching the threadless portion 33a of the binding port 30 with the threaded portion 23b of the second connector 20, the binding port 30 is horizontally moved toward the second connector 20 to bind the binding port 30. The threaded portion 23b of the second connector 20 is fitted into the threadless portion 33a of the (). That is, until now, the coupling port 30 is fitted to the second connector 20 without rotating (B of FIG. 5).

Subsequently, when the binding sphere 30 is rotated, the binding sphere 30 is screwed to the second connector 20, and more specifically, the threaded portion 33b of the binding sphere 30 is the second connector 20. Screwed to the second fastening portion 24 and the fourth fastening portion 34 of the fastener 30 is screwed to the threaded portion 23b of the second connector 20. Therefore, although there are no screw parts 33a and 23a in the binding tool 30 and the second connector 20, the binding tool 30 and the second connector 20 are firmly coupled by screwing in all parts.

In this way, the binding hole 30 is moved in the process of screwing the binding hole 30 to the second connector 20, the second connector 20 pushes the first connector 10, and the binding hole 30 ) And the first connector 10 are coupled to the tapered portions 31 and 11, so that the binding sphere 30 and the first connector 10 are coupled in a wedge fashion.

1,2: First and second reinforcing bars,
10,20: 1st, 2nd connector, 11, 21: 1st, 2nd reinforced part
12,31: taper part, 22: fastening part
23: first fastening part, 23a: no thread part
23b: screw portion, 24: second fastening portion
30: binding sphere, 32: fastening portion
33: third fastening part, 33a: no thread part
33b: screw portion, 34: fourth tightening portion
40,50: 1st, 2nd coil spring,

Claims (4)

By connecting the first and second reinforcing bars (1, 2) of each spiral,
The first connector 10 is screwed to the joint of the first rebar, the second connector 20 is screwed to the joint of the second reinforcing bar, the binding port 30 for binding the first and second connectors Including;
The first connector is formed in a conical shape of a tapered cross section whose outer diameter decreases toward one side, and an inner circumferential surface of the first connector is provided with a first rebar coupling part 11 to which the first rebar is screwed.
The second connector is provided with a second reinforcing bar portion 21 is formed in a cylindrical shape formed with a fastening portion 22 on the outer circumferential surface, the second rebar is screwed on the inner circumferential surface,
The binding sphere has one side of the inner circumferential surface formed with a tapered cross section so that the first connector is fitted and the fastening portion 32 is formed on the other side of the inner circumferential surface, and the first and second reinforcing bars are coupled to each other by being screwed to the second connector. Bind the first and second connectors,
The fastening part 22 of the second connector may include a first fastening part 23 and a screw part of the first fastening part 23, in which a non-threaded part 23a and a threaded part 23b are alternately repeated along the circumferential direction. And a second fastening portion 24 which is continuous with 23b) and has a threaded portion as a whole along the circumferential direction,
The fastening portion 32 of the binding tool includes a third fastening portion 33 formed by alternately repeating the threadless portion 33a and the screw portion 33b along the circumferential direction, and the screw portion 33b of the third fastening portion 33. And a fourth fastening portion 34 which is continuous with the threaded portion as a whole along the circumferential direction, and the screwless portion 33a or the threaded portion 33b of the third fastening portion 33 of the fastening hole 30 is connected to the second portion. And a screwless portion 23b or a screwless portion 23a of the first fastening portion 23 of the connector 20, and the fastening hole is screwed to the second connector by screwing. Rebar coupler with thread. The reinforced coupler having a threadless portion and a threaded portion according to claim 1, wherein the binding sphere and the second connector are provided with display portions (25,35) indicating respective threadless portions or threaded portions. The coil of claim 1 or 2, wherein the first and second coils are interposed between the first and second connectors and the first and second reinforcing bars to bind the first connector and the first reinforcing bars, the second connector, and the second reinforcing bars. Rebar coupler having a threadless portion and a threaded portion comprising a spring (40, 50). The method of claim 3, wherein the first and second coil springs, the first spiral portion smaller than the diameter of the bone of the first, second reinforcing bar, the second spiral portion equal to the diameter of the bone of the first, second reinforcing bar and the first Two or more of the third spiral parts having an outer diameter larger than the inner diameter of the bones of the first and second connectors are formed, and the first to third spiral parts are press-fixed to the first and second rebars and the first and second connectors by restoring force. Each node is inserted between two neighboring threads of the first and second connectors together with the threads of the first and second rebars so that the threads of the first and second reinforcements are connected to each other by the elastic force of the first and second connectors. A rebar coupler having a threadless portion and a threaded portion, wherein the reinforcing coupler has a threadless portion and a threaded portion.

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