WO2008063007A1

WO2008063007A1 - Connector for steel bar

Info

Publication number: WO2008063007A1
Application number: PCT/KR2007/005877
Authority: WO
Inventors: Dae Jin Kang; Seung Hwan Ha
Original assignee: Dae Jin Kang; Seung Hwan Ha
Priority date: 2006-11-22
Filing date: 2007-11-21
Publication date: 2008-05-29
Also published as: KR100793465B1

Abstract

Provided is a connector for steel bars. The connector includes a body, a pair of clamping parts, and a push part. The body accommodates fastening ties. The clamping parts are coupled to the body using a hinge pin. The clamping part includes proximal and distal parts. The proximal part is disposed at a hinge -pin side, and the distal part is disposed opposite to the proximal part. The proximal part makes tight contact with an upper steel bar, and the distal part is rotated about the hinge pin upon the tight contact to push a lower steel bar toward the upper steel bar. The push part is slidable on the body to push the fastening tie toward the clamping parts. Therefore, the connector provides easy, simple, and rapid way of moving a plurality of steel bars close to each other and coupling the steel bars using a fastening tie.

Description

CONNECTOR FOR STEEL BAR

Technical Field

[1] The present invention relates to a connector for steel bars, and more particularly, to a connector for coupling steel bars using an automatically fed fastening tie. Background Art

[2] In construction sites, steel bars are used in concrete structures to reinforce buildings or architecture. In detail, steel bars are placed in a concrete mold in parallel or perpendicular to each other and are connected to each other, and then concrete is poured into the concrete mold to form a reinforced concrete structure.

[3] In a conventional method, joints of the steel bars are connected and fixed by cutting a thin wire into appropriate sizes, winding the cut thin wires around the joints of the steel bars, and twisting the thin wires.

[4] However, since the conventional method is manually carried out, the conventional method is inefficient and consumes much time. Moreover, work efficiency varies largely according to the skills of workers.

[5] For this reason, various coupling clips have been proposed. However, such coupling clips have complicated structures and expensive. Disclosure of Invention Technical Problem

[6] Accordingly, the present invention is directed to a connector providing an easy way of moving a plurality of steel bars close to each other and coupling the steel bars, thereby obviating one or more problems due to limitations and disadvantages of the related art. Technical Solution

[7] In one embodiment, there is provided a connector for steel bars, the connector including: a body accommodating a plurality of fastening ties; a pair of clamping parts each rotatably coupled to the body using a hinge pin, each of the clamping parts including a proximal part at a hinge-pin side and a distal part at a side opposite to the proximal part, the proximal part making tight contact with an upper steel bar, the distal part being rotated about the hinge pin upon the tight contact between the proximal part and the upper steel bar to push a lower steel bar toward the upper steel bar; and a push part slidably disposed on the body to push the fastening tie toward the clamping parts.

[8] The connector may further include a support member disposed at a side of the clamping part for elastically supporting the steel bars.

[9] The clamping part and the support member may include guide portions at pre- determined sides to guide the fastening tie.

[10] The clamping parts may include corresponding recesses at end portions thereof such that the end portions of the clamping parts are overlapped with each other when the clamping parts are moved to each other.

[11] The body may include: a tie receiving portion to accommodate a plurality of fastening ties; and a feed unit elastically pushing the fastening ties so as to feed the fastening ties down to the push unit one by one.

[12] In another embodiment, there is provided a fastening tie for a steel bar connector, the fastening tie has a flexible band shape for enclosing a plurality of steel bars. A plurality of coupling cut-outs is formed in series in a side of the fastening tie, and a coupling head is formed at the other side of the fastening tie. The coupling head can be inserted into the coupling cut-out to form a closed curve.

[13] The coupling cut-outs and the coupling head may have corresponding serrate shapes.

[14] Alternatively, the coupling cut-outs and the coupling head may have corresponding trapezoidal shapes.

[15] In another embodiment, a fastening tie has a flexible band shape for enclosing a plurality of steel bars. A first coupling portion having a serrate shape is formed at an end of the fastening tie, and a second coupling portion having a corresponding serrate shape is formed at the other end of the fastening tie. The first and second coupling portions can be engaged with each other to form a closed curve.

Advantageous Effects

[16] According to the present invention, the connector provides easy, simple, and rapid way of moving a plurality of steel bars close to each other and coupling the steel bars using a fastening tie.

Brief Description of the Drawings [17] FIG. 1 is a plan view illustrating a connector for steel bars according to an embodiment of the present invention. [18] FIG. 2 is a perspective view illustrating a clamping part of the connector of FIG. 1, according to an embodiment of the present invention. [19] FIG. 3 is a sectional view taken along line A-A' of FIG. 1, according to an embodiment of the present invention. [20] FIG. 4 is a schematic plan view illustrating an operation of the clamping part of the connector of FIG. 1, according to an embodiment of the present invention. [21] FIG. 5 is a schematic plan view illustrating an operation of a push part of the connector of FIG. 1, according to an embodiment of the present invention. [22] FIGs. 6 to 9 are perspective views illustrating examples of fastening ties adapted for use with the connector of FIG. 1, according to embodiments of the present invention. Best Mode for Carrying Out the Invention

[23] A connector for steel bars will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[24] Referring to FIGs. 1 to 5, according to an embodiment of the present invention, a connector for steel bars is provided. The connector includes a body 10, clamping parts 20, a push part 30, and support members 40. The body 10 accommodates fastening ties (T) each configured to fasten a plurality of steel bars together. The clamping parts 20 are used to clamp a lower steel bar Sd upward to an upper steel bar Su. The push part 30 is used to push the fastening tie (T) from the body 10 to the clamping parts 20. The support members 40 support the lower and upper steel bars Sd and Su elastically.

[25] The body 10 includes a tie receiving portion 11 for accommodating a plurality of fastening ties (T). The clamping parts 20 are coupled to one side of the body 10, and a handle 12 is formed at the other side of the body 10.

[26] An operator can hold the handle 12 and push the body 10 toward a steel bar.

[27] A feed unit 50 is disposed at a side of the tie receiving portion 11 of the body 10.

The feed unit 50 is used to elastically push the fastening ties (T) down to the push part 30 one by one.

[28] The push part 30 is slidable in the body 10. Thus, one of the fastening ties (T) disposed in the tie receiving portion 11 can be pushed toward the clamping parts 20 using the push part 30 to enclose two steel bars with the fastening tie (T).

[29]

[30] *A handle 13 is formed on an end portion of the push part 30 such that an operator can easily slide the push part 30 by holding the handle 13.

[31] An elastic spring 32 is disposed at a side of the push part 30 to elastically support the push part 30 on the body 10. When the push part 30 is released after it is pushed forward in the body 10, the push part 30 can be automatically moved back to its original position by the resilience of the elastic spring 32.

[32] The clamping parts 20 are rotatably coupled to the body 10 using hinge pins 25.

Each of the clamping parts 20 includes a proximal part 21 and a distal part 22. The proximal part 21 receives the hinge pin 25 and makes contact with the upper steel bar Su. The distal part 22 is formed at a side opposite to the proximal part 21 and is rotatable about the hinge pin 25.

[33] The proximal part 21 and the distal part 22 are formed in one piece. That is, the proximal part 21 and the distal part 22 rotate together about the hinge pin 25. Since the proximal part 21 is closer to the hinge pin 25 than the distal part 22, the distal part 22 rotates in a larger circle than the proximal part 21. [34] The proximal part 21 makes contact with the upper steel bar Su, and the distal part

22 supports the lower steel bar Sd.

[35] After placing the clamping part 20 toward the upper steel bar Su in a manner such that the distal part 22 makes contact with the upper steel bar Su, an operator can push the clamping part 20 against the upper steel bar Su by holding the handle 12. Then, the clamping part 20 is rotated by the reaction of the upper steel bar Su. That is, the distal part 22 is rotated about the hinge pin 25, and thus the lower steel bar Sd is pushed to the upper steel bar Su by the rotating distal part 22. In this way, the two steel bars Su and Sd can be moved close to each other.

[36] Since the distal part 22 rotates in a larger circuit than the proximal part 21, the lower steel bar Sd is moved more than the upper steel bar Su. That is, although the proximal part 21 is slightly moved by the reaction of the upper steel bar Su, the lower steel bar Sd can be largely moved by the distal part 22.

[37] The clamping parts 20 include recesses 22a at ends of the distal parts 22 such that ends of the distal parts 22 can be overlapped.

[38] Owing to the overlapping structure of the distal parts 22, the lower steel bar Sd can be pushed toward the upper steel bar Su much more.

[39] The support members 40 are movably supported on the clamping parts 20 by elastic springs 45 to push a fastening tie (T) against the steel bars Sd and Su.

[40] That is, since the support members 40 can support steel bars elastically, a fastening tie (T) can be tightly pushed against the steel bars although the sizes of the steel bars are varied.

[41] Each of the clamping parts 20 includes a guide portion 23, and each of the support members 40 includes a guide portion 41. When a fastening tie (T) is pushed by the push part 30, the guide portions 23 and 41 guide the fastening tie (T) around the steel bars Su and Sd and allow both ends of the fastening tie (T) to be joined. Mode for the Invention

[42] Examples of fastening ties will now be described in detail according to embodiments of the present invention.

[43] Referring to FIG. 6, a fastening tie TlO of an embodiment has a flexible band shape for enclosing two steel bars. A plurality of coupling cut-outs Tl 1 is formed in series in one side of the fastening tie TlO, and a coupling head T 12 is formed at the other side of the fastening tie TlO. The fastening tie TlO can form a closed curve when the coupling head T 12 is inserted into the coupling cut-out TI l.

[44] The coupling cut-outs Tl 1 and the coupling head T12 have serrate shapes.

Therefore, when the coupling head T 12 is inserted into the coupling cut-outs TI l, the coupling head T 12 can be securely hooked. [45] Referring to FIG. 7, according to another embodiment, a fastening tie T20 includes trapezoidal coupling cut-outs T21 and a trapezoidal coupling head T22. [46] In the current embodiment, when the fastening tie T20 is moved to the clamping parts 20 and disposed around steel bars by the push part 30, the coupling head T22 is inserted into the coupling cut-out T21. [47] That is, when an operator pushes the fastening tie T20 to the clamping parts 20 using the push part 30, the fastening tie T20 is guided along the guide portions of the clamping parts 20 and the support members 40 around two steel bars, and the coupling head T22 is inserted into the coupling cut-out T21. [48] Referring to FIG. 8, according to another embodiment, an opened portion T23 is formed at an end of coupling cut-outs 21 of a fastening tie T20. The opened portion

T23 functions as an entrance for a coupling head T22 so that the coupling head T22 can be easily inserted into the coupling cut-outs T21. [49] Referring to FIG. 9, according to another embodiment, a fastening tie T30 has a flexible band shape for enclosing two steel bars. A first coupling portion T31 having a serrate shape is formed at one side of the fastening tie T30, and a second coupling portion T32 having a serrate shape is formed at the other side of the fastening tie T30.

The fastening tie T30 can form a closed curve when the first and second coupling portions T31 and T32 are engaged. [50] Since the first and second coupling portions T31 and T32 have corresponding serrate shapes, the first and second coupling portions T31 and T32 can be hooked to each other for enclosing steel bars.

Industrial Applicability [51] As described above, according to the above-described embodiments, the connector provides easy, simple, and rapid way of moving a plurality of steel bars close to each other and coupling the steel bars using a fastening tie. Therefore, connector can be used in various industrial fields.

Claims

[1] A connector for steel bars, comprising: a body accommodating a plurality of fastening ties; a pair of clamping parts each rotatably coupled to the body using a hinge pin, each of the clamping parts including a proximal part at a hinge-pin side and a distal part at a side opposite to the proximal part, the proximal part making tight contact with an upper steel bar, the distal part being rotated about the hinge pin upon the tight contact between the proximal part and the upper steel bar to push a lower steel bar toward the upper steel bar; and a push part slidably disposed on the body to push the fastening tie toward the clamping parts.

[2] The connector of claim 1, further comprising a support member disposed at a side of the clamping part for elastically supporting the steel bars.

[3] The connector of claim 2, wherein the clamping part and the support member comprise guide portions at predetermined sides to guide the fastening tie.

[4] The connector of claim 1 or 2, wherein the clamping parts comprise corresponding recesses at end portions thereof such that the end portions of the clamping parts are overlapped with each other when the clamping parts are moved to each other.

[5] The connector of claim 1 or 2, wherein the body comprises: a tie receiving portion to accommodate a plurality of fastening ties; and a feed unit elastically pushing the fastening ties so as to feed the fastening ties down to the push unit one by one.