KR101683143B1 - One-touch Quick-coupler for Connecting Reinforcing Rods - Google Patents

Abstract

The present invention relates to a one-touch type rebar coupler which maintains a state where a plurality of pieces are spread before rebar connection by a cylindrical holder, and is able to fixate a rebar tightly since the pieces are clenched automatically by a penetrating rebar when a work connecting the rebar is performed. According to the present invention, the one-touch type rebar coupler comprises: a coupler body where an entrance inserted with the rebar is formed on one end, including a hollow part having a tapered part whose inner diameter becomes narrower going to an entrance from an opposite side to the entrance; the plurality of pieces installed to have an outer surface to be connected to a tapered part in a hollow part of the coupler body, having a plurality of locking protrusions formed to be supported while a joint of the rebar is latched onto an inner surface; an elastic ring providing an elastic force inwardly in a radial direction to the pieces while being elastically combined to an outer side of the plurality of pieces; an elastic member pressurizing the pieces toward the entrance of the coupler body while being installed in the hollow part of the coupler body; and the holder having a plurality of gap maintaining parts on an outer surface which are inserted through one end of the plurality of pieces while a surface toward the entrance of the coupler body is formed in an opened cylindrical shape, and spread the gap among the pieces while being inserted among the pieces.

Description

One-touch Quick-coupler for Connecting Reinforcing Rods

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupler for connecting reinforcing bars, and more particularly, to a coupler for connecting reinforcing bars, which is inserted into a bracket through a lower end of a plurality of brackets having serrated projections, Type reinforcing coupler which is capable of fixing a reinforcing bar with a strong force because the holder is automatically disengaged by the elastic force of the spring while the holder is separated from the body by the reinforcing bars at the time of inserting the reinforcing bars.

Conventionally, in order to connect reinforcing bars for use in concrete structures in various construction sites, reinforcing bars are conventionally bundled and fixed in a double layer structure. However, in this reinforcing bar fixing method, an operator has to wire the reinforcing bars around the reinforcing bars a plurality of times The work is troublesome and the center of the reinforcing bar is not vertical and is not straight, but the strength of the wire is weak, so that it is easily broken and the connection state is released.

In order to solve these problems, reinforcing bars (coupling devices) have been developed and used for easily and firmly connecting reinforcing bars by means other than wires.

However, most of the conventional reinforcing bars are structured by inserting the reinforcing bars into the housing and then screwing the housing into the housing, which is complicated in structure and difficult to connect the reinforcing bars. there is a problem.

In order to solve such a problem, Korean Registered Patent No. 0439305 (registered on June 28, 2004), Korean Registered Patent No. 0462291 (registered on December 2004), Korea Registered Patent No. 1003302, One-touch type reinforcing couplers are disclosed.

The conventional one-touch type reinforcing couplers have a plurality of assemblies for holding reinforcing bars inside the coupler. When the reinforcing bars are inserted, they naturally spread outwardly. When the reinforcing bars are completely inserted, When the tensile force is applied to the reinforcing bar, the wing acts as the wing is supported by the inclined surface of the coupler body so that the reinforcing bar is firmly supported from the coupler body.

However, the conventional one-touch type reinforcing couplers are required to maintain a widened state when the reinforcing bars are inserted, but it is difficult to maintain the predetermined position due to the elastic force of the spring disposed at the lower portion of the fitting. And there is a problem that the verticality of the reinforcing bar is not accurately displayed.

Conventionally, there has been used a method of forming a guide member between the assemblies to maintain the position of the assembled body or to form a receiving groove capable of maintaining its position while inserting the member into the inner surface of the coupler body. However, There is a problem in that an initial slip phenomenon occurs when the tensile force is applied to the reinforcing bars as the guide member interferes with the assembled body and the reinforcing bars escape. When the receiving groove is formed in the coupler body, There is a problem in that it is difficult to form an accurate size and shape.

Korean Registered Patent No. 10-0439305 (registered on June 28, 2004) Korean Registered Patent No. 10-0462291 (Registered on December 8, 2004) Korean Registered Patent No. 10-1003302 (Registered on December 16, 2010) Korean Registered Patent No. 10-1259959 (Registered on April 25, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a reinforcing bar by maintaining a state in which a plurality of assemblies are opened to each other before a reinforcing bar is connected by a cylindrical holder, It is possible to fix the reinforcing bars by fixing the reinforcing bars automatically by the inserted reinforcing bars at the time of connecting the reinforcing bars so that it is easy to insert the reinforcing bars with a simple structure and at the same time, Touch type reinforcing coupler in which the initial slip phenomenon can be eliminated by fixing the reinforcing member.

Another object of the present invention is to provide a one-touch type reinforcing coupler capable of precisely capturing the verticality of a reinforcing bar inserted by a spring supporter for holding a holder and a holder.

In order to achieve the above object, a one-touch type reinforced coupler according to the present invention includes an inlet for receiving a reinforcing bar at one end thereof, and a tapered portion for gradually decreasing the inner diameter from the opposite side of the inlet toward the inlet A coupler body having a hollow portion; A plurality of fixtures formed inside the hollow portion of the coupler body so as to be connected to the tapered portion at an outer side thereof and having a plurality of locking protrusions supported at an inner side thereof by a bar of a reinforcing bar; An elastic ring elastically coupled to an outer surface of the plurality of plates to provide an elastic force radially inwardly to the plates; An elastic member installed inside the hollow portion of the coupler body to press the assemblies toward the inlet of the coupler body; A holder having a cylindrical shape with an open face facing the inlet of the coupler body inserted through one end of the plurality of assemblies and inserted into the outer surfaces of the plurality of assemblies and spaced apart from the assemblies, The reinforcing bars inserted through the mouth of the coupler body are inserted into the holder and the holder is disengaged from one end of the assemblies and the assemblies are pinched by the elastic rings so that the locking protrusions of the assemblies are attached to the outer surface of the reinforcing bar And is pressed.

According to the present invention, when the reinforcing bars are inserted by the holder before the reinforcing bars are inserted into the coupler body, when the reinforcing bars are inserted into the coupler body, the holder is separated from the body by the reinforcing bars and the components are strongly pressed on the outer surface of the reinforcing bars, . Therefore, the structure and operation are simpler than those of the prior art, and the manufacturing is facilitated.

Further, since the plate-shaped holder has a plate-shaped fitting groove formed at an outer surface thereof with an inner surface of the plate-shaped body being in close contact with the plate-shaped holding groove, the plate can be maintained in a widened state under a uniform force.

A holder taper portion is formed at one end of the holder so that the diameter gradually decreases toward the end. A guide taper portion corresponding to the holder taper portion is formed on the spring supporter for supporting the elastic member. The holder taper portion is guided by the guide taper portion and is fixed at the correct position when moving out of the bracket, so that there is an effect that the perpendicularity of accurately connecting the reinforcing bars to the ground in the vertical direction can be improved.

1 is an exploded perspective view of a one-touch type reinforcing coupler according to an embodiment of the present invention.
FIG. 2 is a perspective view of the reinforcing coupler shown in FIG. 1 with the coupler body removed.
3 is a longitudinal sectional view of the reinforcing coupler shown in Fig.
FIG. 4 is a longitudinal sectional view showing a state where a reinforcing bar is connected to the reinforcing coupler shown in FIG. 1. FIG.
FIG. 5 is an exploded perspective view showing the assembled state of the reinforcing coupler shown in FIG. 1 and the coupled state of the holder.
Fig. 6 is a cross-sectional view showing the assembled state of the joint and the holder shown in Fig. 5;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a one-touch type reinforced coupler according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 6, a one-touch type reinforcing coupler according to an embodiment of the present invention includes a coupler body 10 in the form of a cylindrical tube, a coupler body 10 installed inside the coupler body 10, The elastic member 30, the elastic member 40, the holder 60, the spring supporter 50, and the like, which are configured to rigidly hold the reinforcement B inserted into the inside .

The coupler body 10 is made of a rigid metal material and has an inlet 11a through which the reinforcing bar B is inserted at one end. The coupler body 10 has an inner diameter gradually increasing from the opposite side of the inlet 11a toward the inlet 11a, And a hollow portion 11 on which a tapered portion 12 is formed. One end of the coupler body 10 opposite to the one end of the coupler body 10 having the inlet 11a is provided with a threaded portion 13 for spirally coupling with another coupler body 10a (hereinafter referred to as a lower coupler body) Respectively. Accordingly, when two pairs of coupler bodies 10 and 10a corresponding to each other as shown in FIG. 1 are spirally engaged and the reinforcing bars B are inserted into the respective coupler bodies 10 and 10a, two The reinforcing bars B can be connected to each other. In this embodiment, the threaded portion 13 of the coupler body 10 disposed on the upper side is made of a female thread and the threaded portion 13a of the lower side coupler body 10a disposed on the lower side is made of a male thread. The elastic member 30, the elastic member 40, the holder 60 and the spring supporter 50 are formed in the lower side of the lower coupler body 10a. The embodiment of the reinforcing coupler of the present invention mainly comprises the coupler body 10 disposed on the upper side and the plurality of the coupling bodies 20, the elastic ring 30, the elastic member 40, the holder 60 and the spring supporter 50 .

The fixing ring 70 supporting the spring supporter 50 is fixed between the upper coupler body 10 and the lower coupler body 10a when the coupler bodies 10 and 10a are coaxially connected as in this embodiment . The fixing ring 70 is fixed by a step 14 formed near the threaded portion 13 or 13a of the upper coupler body 10 or the lower coupler body 10a.

The plurality of fixtures 20 are provided in the hollow portion 11 of the coupler body 10 and the outer surface thereof is correspondingly connected to the tapered portion 12 of the coupler body 10. The plurality of fixtures 20 (four fixtures 20 in this embodiment) have the same shape, and are elastically supported by the elastic ring 30 to maintain a conical shape as a whole. A ring insertion groove 22 is formed in the outer surface of the body 20 along the circumferential direction to which the elastic ring 30 is inserted.

A plurality of locking protrusions 21 are formed on the inner surface of the fixture 20 so as to be supported by the nodule P of the reinforcing bar B. The locking protrusions 21 are arranged at a constant pitch along the axial direction of the coupler body 10 and are provided with a ratchet so as to resist the tensile force applied from the node P of the reinforcing bar B and to prevent the reinforcing bar B from falling. It is preferable to have a saw tooth shape. The locking protrusions 21 are preferably formed at a pitch of 1 占 0.05 mm, but may be changed according to the standard of the reinforcing bars.

The elastic ring 30 may be made of a rubber or a silicone resin such as a circular ring which is formed as a whole, but may also be made of a metal having a C-shaped ring whose one end is opened. The elastic ring 30 is inserted into a ring insertion groove 22 formed on the outer surface of each of the assemblies 20 and is elastically coupled to the outer surfaces of the assemblies 20. The resilient ring 30 acts to radially inwardly provide an elastic force to the assemblies 20 so that the assemblies 20 can be automatically pinched and pressed onto the outer surface of the reinforcing bar B. [

The elastic member 40 is provided between the spring supporter 50 and the fixture 20 to provide an elastic force to the fixture 20 in the axial direction with respect to the spring supporter 50, So that the fixture 20 is brought into close contact with the tapered portion 12 of the coupler body 10. The elastic member 40 may be a compression coil spring or the like as in this embodiment, but may also be constructed using a high-elasticity plate spring.

The spring supporter 50 supports the holder 60 while supporting the elastic member 40 to restrict the insertion position of the reinforcing bar B. In this embodiment, the spring supporter 50 is formed of a ring-shaped plate having an opening 51 at its center and is supported by the stationary ring 70. A spring insertion groove 53 is formed on the upper surface of the spring supporter 50 along the circumferential direction to support the lower end of the elastic member 40 while being seated.

On the other hand, the four assemblies 20 are kept open to each other before the connection of the reinforcing bars B by the metal cylindrical holder 60 inserted in the space between the lower ends of the four assemblies 20, B is inserted and the holder 60 is detached from the lower end of the body 20, it is pressed by the elastic ring 30 to the outer surface of the inserted reinforcing bar B.

That is, the holder 60 is inserted through the lower ends of the four assemblies 20 so as to overcome the elastic force of the elastic ring 30 and maintain the openings 20 open, 11a by the reinforcing bars B inserted through the joints 20a and 20b.

The holder 60 is formed in a cylindrical shape having an open surface facing the inlet 11a of the coupler body 10. The holder 60 is inserted into the outer surface of the coupler body 10 between the joints 20, (Four in this embodiment) spacing holders 61 are formed at intervals of 90 degrees along the circumferential direction.

The cavity holding part 61 is formed on the outer surface of the coupler body 10 between a plurality of plate fitting grooves 62 spaced apart in the circumferential direction, Width and curvature corresponding to the lateral width and the curvature of the inner surface of the body 20. When the holder 60 is inserted through the lower ends of the four assemblies 20, the lower ends of the inner sides of the respective assemblies 20 come into close contact with the fitting holes 62 of the holder 60, So that it is possible to maintain a stably opened state.

The interval maintaining portion 61 includes two first interval maintaining portions 61a arranged at intervals of 180 degrees along the circumferential direction and a second interval maintaining portion 61b spaced apart from the first interval maintaining portions 61a by 90 degrees in the circumferential direction And two second spacing portions 61b facing each other. The left-right width W1 of the first gap-maintaining portion 61a is greater than the left-right width W2 of the second gap-maintaining portion 61b. When the first spacing members 61a are formed larger than the second spacing members 61b as described above, the spacing of the members 20 disposed with the first spacing member 61a interposed therebetween is larger than that of the second spacing members 61b. Is relatively larger than the spacing of the knobs 20 disposed between the knobs 61b. 2, even if the rib R is formed on the outer surface of the reinforcing bar B in the longitudinal direction, the rib R can be inserted into the gap opened by the first gap retaining portion 61a The reinforcing bars B can smoothly enter the inside of the braid 20 without interference and when the reinforcing bars B completely enter and the four braids 20 are pressed onto the outer surface of the reinforcing bars B, 20 are uniformly pressed on the outer surface of the reinforcing bar (B), so that a strong fixing force can be exerted.

If the widths of the first gap maintaining portion 61a and the second gap maintaining portion 61b are both the same, the gap between the four assemblies 20 becomes the same, The rib R of the reinforcing bar B is interfered with the locking protrusion 21 of the bracket 20 when the rib R is inserted into the ribs 20 and the rib R is inserted after the reinforcing bar B is inserted, It is possible that stresses are dispersed and the strong fixation force can not be developed due to the eccentric body 20 being eccentrically pressed against the reinforcement B.

A holder tapered portion 63 is formed on the outer surface of the lower end of the holder 60 so that the outer diameter of the holder tapered portion 63 decreases toward the spring supporter 50, A guide tapered portion 52 inclined at an angle corresponding to the holder tapered portion 63 is formed on the inner circumferential surface of the central opening 51. The holder taper portion 63 is seated while being guided by the guide taper portion 52 at the center of the spring supporter 50 when the holder 60 is detached from the body 20 by the reinforcing bar B and descends, The reinforcing bars B can be inserted exactly in the vertical direction in the center of the coupler body 10.

Since the outer diameter of the spring supporter 50 is substantially equal to the inner diameter of the coupler body 10 and the spring supporter 50 is inserted into the coupler body 10, It is possible to accurately maintain the vertical degree of connection in the vertical direction accurately.

The above-configured one-touch type reinforced coupler of the present invention works as follows.

The assemblies 20 disposed inside the coupler body 10 before inserting the reinforcing bars B into the coupler body 10 are separated from each other by a holder 60 inserted through the space at the lower end thereof Lt; / RTI > At this time, the lower end of the inner surface of each of the fixtures 20 is in close contact with the fitting-in groove 62 of the holder 60 and is supported by the elastic ring 30 in a state in which a strong elastic force is applied radially inward.

In this state, when the reinforcing bars B are inserted into the hollow portion 11 through the inlet 11a formed at the upper end of the coupler body 10, the reinforcing bars B pass through the joints 20 and descend. At this time, the ribs R formed in the longitudinal direction on both outer sides of the reinforcing bars B are guided as they enter between the joints 20 opened by the first gap-maintaining portion 61a of the holder 60. [

The lower end of the reinforcing bar B is inserted into the holder 60 through the opened upper surface of the holder 60 and then pushes the holder 60 downward while contacting the lower surface of the holder 60, As the holder 60 comes out from the lower end of the body 20, the bodies 20 are automatically lifted by the elastic force of the elastic ring 30. As a result, the inner surface of the body 20 is strongly pressed against the outer surface of the reinforcing bar (B).

The lower end of the holder 60 which is detached from the body 20 by the reinforcing bars B is inserted and supported inside the opening 51 of the spring supporter 50. The lower end of the holder 60 And a guide tapered portion 52 inclined in correspondence with the holder tapered portion 63 is formed on the inner peripheral surface of the opening portion 51 of the spring supporter 50. Therefore, The coupling position of the holder 60 with respect to the spring supporter 50 is precisely determined while the portion 63 is guided by the guide taper portion 52. Accordingly, when the reinforcing bar B is moved from the inside of the coupler body 10 to the ground In the vertical direction.

Since the elastic bodies 20 receive an elastic force from the inner side of the coupler body 10 toward the inlet 11a by the elastic members 40, the outer surfaces of the elastic bodies 20 are in close contact with the tapered portions 12. [

When a force is applied to the reinforcing bar B in the axial direction outward of the coupler body 10 in a state where the reinforcing bars B are inserted into the coupler body 10 and the reinforcing bars B are connected to the coupler body 10, The nip P of the reinforcing bar B hits the locking protrusion 21 of the fixture 20 and presses the fixture 20 upward. At this time, the tapered portion 12 becomes narrower toward the inlet 11a The joints 20 act as a wedge and are tightly restrained inside the coupler body 10 without detaching the reinforcing bars B. [

When the reinforcing bars B are inserted and fixed to the coupler body 10, the concrete mortar is poured and the coupler body 10 and the reinforcing bars B are fixed in the concrete.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

10, 10a: Coupler body 11: Hollow part
11a: inlet 12: tapered portion
20: coupling 21: locking projection
22: ring insertion groove 30: elastic ring
40: elastic member 50: spring supporter
51: opening portion 52: guide taper portion
60: Holder 61:
62: plate fitting groove 63: holder tapered portion
70: Retaining ring B: Reinforcing
P: node R: rib

Claims (6)

(11a) for inserting reinforcing bars at one end thereof and a hollow portion (11) having a tapered portion (12) gradually reduced in diameter from the opposite side of the inlet toward the inlet side 10);
Wherein a plurality of locking protrusions are provided on the inner side of the hollow portion 11 of the coupler body 10 so as to be connected to the tapered portion 12, 21) are formed;
An elastic ring (30) elastically coupled to an outer surface of the plurality of the bodies (20) to provide an elastic force radially inwardly to the bodies (20);
An elastic member 40 provided inside the hollow portion 11 of the coupler body 10 to press the assembled bodies 20 toward the inlet 11a of the coupler body 10;
The surface of the coupler body 10 facing the inlet 11a is opened and the opposite surface thereof is closed and inserted through one end of the plurality of fixtures 20, A holder 60 having a plurality of spacing portions 61 that are spaced apart from each other and spaced apart from each other while being inserted between the holders 60;
A circular opening 51 is formed in the central portion and a spring insertion groove 53 is formed on the outer side of the opening 51 to receive one end of the elastic member 40 while being seated in a ring shape along the circumferential direction A spring supporter (50) installed inside the hollow part (11) of the coupler body (10) and having an outer diameter coinciding with the inner diameter of the hollow part of the coupler body (10);
/ RTI >
The reinforcing bars B inserted through the inlet 11a of the coupler body 10 are inserted inward through the open face of the holder 60 to contact the closed face, 20 and the fitting bodies 20 are pinched by the elastic ring 30 so that the locking protrusions 21 of the fitting body 20 are pressed against the outer surface of the reinforcing bar B,
A holder tapered portion 63 is formed on an outer surface of one end of the holder 60 toward the spring supporter 50 to have a smaller outer diameter toward the spring supporter 50 than the spring supporter 50, A guide tapered portion 52 inclined at an angle corresponding to the holder tapered portion 63 is formed on the inner peripheral surface of the central opening 51 so that the holder 60 is supported by the reinforcing bars B Wherein the holder taper part (63) is seated while being in contact with the guide taper part (52) when the guide taper part (52) is released. The holder (60) according to claim 1, wherein the gap holding portion (61) of the holder (60) is formed between a plurality of fitting grooves (62) formed on the outer surface of the holder Wherein the fitting groove (62) of the fitting body (20) has a lateral width and a curvature corresponding to the lateral width and the curvature of the inner surface of the fitting body (20). 3. The connector according to claim 2, wherein the four bodies (20) are arranged along the circumferential direction,
The space holding portion 61 of the holder 60 includes two first spacing portions 61a disposed at intervals of 180 degrees in the circumferential direction and two first spacing portions 61a spaced apart from the first spacing portions 61a in the circumferential direction And the width of the first gap-maintaining portion 61a is greater than the width of the second gap-maintaining portion 61b. The width of the second gap-maintaining portion 61b is greater than the width of the second gap- One-touch type reinforced coupler characterized by large. delete delete delete

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