KR101565468B1

KR101565468B1 - one-touch rebar coupling apparatus

Info

Publication number: KR101565468B1
Application number: KR1020150068618A
Authority: KR
Inventors: 김홍남
Original assignee: 김홍남
Priority date: 2015-05-18
Filing date: 2015-05-18
Publication date: 2015-11-03

Abstract

In order to bond and easily separate reinforcing bars for structural reinforcement, the present invention is characterized in that a hollow insertion portion having both open sides for inserting the structural reinforcing steel bars therein is formed, and a casing is provided with a spring on the inner periphery of each insertion portion; A plurality of slit holes formed at predetermined intervals in the circumferential direction, the clamp body being inserted into each of the insertion portions and being cylindrically shaped so that an inner end thereof is elastically pressed outwardly by the spring; And a clamp interposed in each of the slit holes and having a ratchet protrusion protruded from the front surface thereof so as to confine the ribs of the reinforcing bars introduced into the inner side.

Description

[0001] The present invention relates to a one-touch rebar coupling apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reinforcing bar coupling device, and more particularly, to a one-touch reinforcing bar coupling device capable of coupling reinforcing bars for structural reinforcement and separating them easily.

In general, the concrete is a composite composition comprising cement, sand, gravel, water, etc. mixed at a suitable ratio. Although the compressive strength is comparatively high, the tensile strength is very low compared with the compressive strength and cracks tend to occur. In order to increase the tensile strength of such concrete, reinforcing bars for structural reinforcement are placed in a form in which the concrete is laid, and then the concrete is reinforced by casting the concrete.

Generally, ribs are formed on the outer surface of the reinforcement for structural reinforcement so that the adhesion strength with concrete is large and the crack width is reduced when cracks occur in the concrete. Further, the diameters of the reinforcing bars are formed differently depending on the required strength for structural reinforcement.

Meanwhile, in order to install a conventional concrete form, arranging the reinforcing bars in a predetermined shape is performed. Since the reinforcing bars are manufactured in a standardized length, it is necessary to interconnect the reinforcing bars of a predetermined length during the placing operation , And the conventional method of joining reinforcing bars is mainly a welding joining method or a folding joining method.

However, the welding joint method has a disadvantage in that the end portions of the deformed reinforcing bars are welded to each other so that the work is very cumbersome and takes a long time and construction is delayed.

On the other hand, the folding method is a method of interconnecting wires at the ends of reinforcing bars which are overlapped with each other. Since a wire is wound around each reinforcing bar, a large amount of reinforcing bars are wasted due to the length of the reinforcing bars. In addition, since the bending strength of the connecting portion is weak, the reinforcing bars are not completely fixed when the form is collapsed in the process of casting the concrete, so that the reinforcing bars are separated and separated, resulting in serious safety problems such as an operator falling.

Korean Patent No. 10-100302 to Korean Patent Laid-open No. 10-2013-0061158 disclose a connecting coupler for connecting reinforcing bars. These couplers interconnect and fix the ends of the two reinforcing bars by a plurality of fastening members provided inside the coupling case.

However, such a coupler has a problem that it is difficult to separate and insert a reinforcing bar having a diameter smaller than a desired size once it is accidentally inserted, and it takes a long time to significantly reduce work productivity. As a result, unnecessary resources are wasted because disassembled reinforcing bars and couplers must be disposed of.

Further, when the reinforcing bars having a reinforcing strength lower than a predetermined safety factor are disposed at the concrete placement position in a state that the reinforcing bars are mistakenly combined with each other by mistake, there is a serious problem that the safety of the building is lowered.

Further, since the reinforcing bar portion inserted into the coupler is not exposed to the ribs and the outer periphery of the coupler is smooth, the adhesion force between the coupler and the concrete is somewhat low, so that the concrete is peeled after the concrete is inserted. .

Korean Patent No. 10-100302 Korean Patent Publication No. 10-2013-0061158

In order to solve the above-mentioned problems, the present invention provides a one-touch steel reinforcing bar coupling device capable of easily connecting and separating reinforcement bars for structural reinforcement.

According to an aspect of the present invention, there is provided a reinforcement structure for a structural reinforcement, comprising: a casing portion having a hollow insertion portion opened at both sides thereof for inserting a structural reinforcing steel bar therein; A plurality of slit holes formed at predetermined intervals in the circumferential direction, the clamp body being inserted into each of the insertion portions and being cylindrically shaped so that an inner end thereof is elastically pressed outwardly by the spring; And a clamp interposed in each of the slit holes and having a ratchet protrusion protruded from the front surface thereof so as to confine the ribs of the reinforcing bars introduced into the inner side.

Here, it is preferable that the outer end of the clamp body portion is provided with a handling portion that extends outwardly of the casing portion so as to be press-fitted.

The outer surface of the clamp is formed to be inclined downward toward the inlet side of the casing, and an inclined surface corresponding to the outer surface of the clamp is formed in the inner periphery of the casing on the inlet side. Is extended with an allowance to be moved radially outward.

Preferably, a constraint bar is formed at one side of the slit hole, and the constraint groove is formed in the clamp to prevent the constraint bar from being inserted into the constraint bar.

In this case, a spring step is formed in the inner periphery of the insertion part to which one side of the spring is constrained, and a snap ring insertion groove is formed in the entrance side of the insertion part, in which a snap ring for preventing the removal of the clamp body is inserted.

Through the above-mentioned solution, the one-touch type reinforcing bar coupling device of the present invention provides the following effects.

First, by inserting reinforcing bars into a pair of insertion portions symmetrically formed in the casing portion, workability and productivity can be remarkably improved because the mutual engagement and fixing are completed. In addition, So that the pair of reinforcing bars can be easily coupled with each other in the longitudinal direction with a small force.

Secondly, when the operator presses the handle part integrally connected to the clamp body part to the inside of the insertion part, the spring is compressed and the clamp body part is moved inward, and the ratchet projection part of the clamp is retracted radially outward, The operator is able to easily separate and reuse the reinforced steel bars by mistake, thereby preventing occurrence of resource equipment.

Third, even if a reinforcing bar having a reinforcing strength lower than a predetermined safety factor is mistakenly bonded, it is possible to remove the fear that the safety of the building is lowered by installing the concrete by combining the reinforcing bars after separating the reinforcing bar easily.

Fourth, minimization of the rebar disturbance during the form collapse during concrete pouring and keeping the stable state prevents the operator from falling down, and the reinforcing rib is formed on the outer periphery of the one-touch type steel reinforcing bar and the bonding strength with concrete can be remarkably improved have.

1 is a perspective view of a one-touch steel reinforcing bar according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of a one-touch type steel reinforcing bar according to an embodiment of the present invention; FIG.
3 is a cross-sectional view of a one-touch steel reinforcing device according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a state where reinforcing bars are coupled to a one-touch steel reinforcing bar according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a state in which reinforcing bars are separated from the one-touch type reinforcing bars according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a one-touch steel reinforcing bar according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same parts throughout the drawings, and the same reference numerals denote the same parts throughout the drawings.

The one-touch type reinforcing bar coupling apparatus according to the present invention can be used mainly as a device for connecting concrete reinforcing reinforcing bars having a limited length according to the standard to be embedded in concrete when casting concrete. Of course, the present invention is not limited to this, and the one-touch type reinforcing bar coupling device may be used to connect various reinforcing bars for other purposes.

FIG. 1 is a perspective view of a one-touch steel reinforcing bar according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a one-touch steel reinforcing bar according to an embodiment of the present invention, Sectional view of a one-touch steel reinforcing device according to the present invention.

1 to 3, a one-touch type steel reinforcing bar 10 according to the present invention includes a casing portion 11, a clamp body portion 20, and a clamp 30.

Here, the casing part 11 is formed with a hollow insertion part formed therein as a space symmetrically opened on both sides so as to insert the structural reinforcing steel bar 1, and a spring 43 is disposed on the inner periphery of each insertion part . At this time, the inner diameters of the insertion portions disposed on both sides may be the same, but they may be formed differently depending on the specification of the reinforcing bars to be coupled.

In addition, each of the inserting portions may communicate with each other, but it is preferable that a stopper wall surface 18 is formed at a central portion of the casing portion 11 to prevent excessive reinforcement of one side reinforcement.

Meanwhile, the casing part 11 may be formed of a metal material such as stainless steel or aluminum casting or a reinforced plastic material such as polyacetal (POM). In the outer periphery, the contact area with concrete is increased, It is preferable that a plurality of reinforcing ribs 15 project along the circumferential direction.

The clamp body 20 is inserted into each of the insertion portions and is cylindrically shaped so that an inner end thereof is elastically pressed outward by the spring 43. The clamp body 20 has a plurality of slits A hole 20a is formed.

Further, the clamp 30 is interposed in each slit hole 20a. A ratchet protrusion 32 protruding from the front surface of the clamp 30 is formed on the inner surface of the clamp 30 so as to restrain the ribs 1a of the reinforcing bar 1 introduced into the insertion portion. A restraining bar 21 is formed at one side of the slit hole 20a and the restraining bar 21 is inserted into the restraining groove 31 formed in the clamp 30. [

Therefore, the clamp 30 is prevented from being displaced inward because the clamping bar 21 is seated from the outer circumferential side of the clamping body 20 into the restricting groove 31. In this assembled state, the clamp body 20 is inserted into the insertion portion.

The inner end of the spring 43 is restrained at the spring step 14 formed at the inner periphery of the inserting portion and the outer end of the spring 43 is brought into close contact with the clamping body 20. A snap ring insertion groove 17a into which a snap ring 17 for restraining the clamp body 20 or the clamp 30 from detaching is inserted is formed at the entrance side of the insertion portion.

The clamp body 20 is constrained between the spring 43 and the snap ring 17 so that the clamp body 20 is elastically supported by the spring 43 in the outward direction of the insertion portion. do.

The clamping body 20 is provided with a handling part 25 which is extended to be exposed to the outside of the insertion part so as to be selectively pressed by a worker. At this time, it is preferable that the outer end of the handling part 25 is formed to be expanded so as to be easily handled by an operator.

As a result, when the operator presses the handling portion 25 inward, the ratchet protrusion 32 releases the state of restricting the ribs 1a of the reinforcing bars, thereby easily separating the reinforced reinforcing bars.

Here, the clamp body 20 is formed of a reinforced plastic material, and the clamp 30 is formed of a metal material.

Hereinafter, the process of joining and separating the reinforcing bars 1 by the one-touch steel reinforcing bar 10 will be described in detail.

FIG. 4 is a cross-sectional view illustrating a state where reinforcing bars are coupled to a one-touch type reinforcing bar coupling apparatus according to an embodiment of the present invention. FIG. 5 is a cross- Fig.

As shown in FIG. 4, the ratchet projection 32 includes a plurality of ratchet teeth formed by repeatedly forming a beveled surface inclined downward in the outward direction and a stepped surface connected to the inner end of the beveled surface.

Therefore, the rod ribs 1a of the inserted reinforcing bars 1 press the spring 43, which supports the inner end of the clamping body portion 20, when passing through the oblique surface, and press the ribs 1 inward to elastically deform. Since the clamping body 20 is moved outwardly by the restoring force of the spring 43 and the rod ribs 1a are restrained on the stepped surface of the ratchet, It can be firmly fixed. Thus, even when the form is collapsed during the concrete pouring, the joint state of the reinforcing bars is stably maintained, thereby preventing the operator from falling down.

The outer surface of the clamp 30 is downwardly inclined downwardly toward the inlet of the casing part 11 and the inner surface of the outer surface of the clamp 30, The inclined surface 13 is formed. Here, the inclined surface 13 on the inner side of the inlet side of the casing portion 11 is formed to extend longer than the length of the clamp 30. That is, the inclined surface 13 has an allowance.

As described above, the clamp 30 is moved along the inclined surface 13 formed with the margin length on the inner circumference of the inlet side of the inserting portion with an allowance length, and moved radially outward. Therefore, the ratchet projection 32 of the clamp 30 is retracted radially outwardly, so that the restraint state of the reinforcing bar 1 can be released.

5, when the operator pushes the handle portion 25 integrally extended from the clamp body portion 20 to the inside of the insertion portion, the spring 43 is compressed and the clamp body portion 20 . At this time, the ratchet projection 32 of the clamp 30 is retracted outward in the radial direction, and the restraint state of the reinforcing bar 1 is released.

Therefore, the operator can easily separate the erroneously-bonded reinforcing bars and can reuse the reinforcing bars of the correct size and material, thereby preventing the occurrence of resource equipment. Furthermore, even if a reinforcing bar having a reinforcing strength lower than a predetermined safety factor is mistakenly bonded, it is possible to remove the fear that the safety of the building is lowered by installing the concrete by combining the reinforcing bars after separating the reinforcing bars easily.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

1: reinforcing bar 1a:
10: One-touch type reinforcing bar coupling device 11:
13: slope 14: spring step
15: reinforcing rib 17: snap ring
18: stopper wall surface 20: clamp body portion
20a: Slit hole 21: Restraint bar
25: handle portion 30: clamp
32: ratchet protrusion 43: spring

Claims

A hollow insertion portion having openings at both sides thereof for inserting the reinforcing steel for structural reinforcement therein, a casing portion having a spring on the inner periphery of each insertion portion,
A plurality of slit holes are formed at predetermined intervals along the circumferential direction, and a plurality of slit holes are formed at predetermined intervals along the circumferential direction, and the outer ends of the slit holes are press- A clamp body portion having a handle portion extending outwardly of the portion; And
And a clamp having a ratchet protrusion protruded from the front surface thereof so as to confine the ribs of the reinforcing bar introduced into the inside of the slit hole,
Wherein an outer surface of the clamp is formed to be inclined downward toward an inlet side of the casing and an inclined surface corresponding to an outer surface of the clamp is formed in an inner periphery of an inlet side of the casing, And is extended with an allowance length to be moved outward in the direction,
Wherein a restraining bar is formed at one side of the slit hole and a restraining groove is formed in the clamp to prevent the restraining bar from being inserted inward.

delete

The method according to claim 1,
Wherein a snap ring insertion groove is formed at an entrance side of the insertion portion, in which a snap ring for preventing the detachment of the clamp body is inserted,
Wherein a reinforcing rib is formed on an outer periphery of the casing to protrude a contact area with the concrete.