JP2014517176A - One-touch quick coupler for rebar connection - Google Patents

Abstract

  The present invention relates to a one-touch quick coupler for connecting reinforcing bars, and is provided in the left and right body 100, 200 to which both ends of the reinforcing bar 300 are inserted and fixed, and inside the left and right body 100, 200, and grips both ends of the reinforcing bar 300. In the reinforcing bar coupler comprising the left and right grips 110 and 210 and connecting the reinforcing bar 300, the left and right bodies 100 and 200 are respectively connected to the front reinforcing bar insertion holes 101 and 201, the side walls 102 and 202, and the rear holes 103 and 203, respectively. The rear portions of the left and right body 100, 200 are coupled to each other, the inner diameter of the side walls 102, 202 is an inclined tapered shape, and the outer diameter portions of the left and right grip portions 110, 210 are also And the inclined portions of the left and right grips 110 and 210 interact with the inclined portions of the inner diameters of the side walls 102 and 202, respectively. The wedge 300 acts so that the rebar 300 is not detached, and the inner diameter portions of the left and right grips 110 and 210 are formed with a sawtooth 600 in the longitudinal direction. A groove 601 that can accommodate the node protrusion 301 is formed. In the present invention, the rebar can be securely and safely gripped by the operation of the grip portion formed with the saw blade in the coupler, and the manufacturing cost is reduced and the material cost is reduced. Has an excellent effect.

Description

  The present invention relates to a one-touch quick coupler for connecting reinforcing bars, and more particularly to a one-touch quick coupler for connecting reinforcing bars that uses a wedge-shaped gripper having a saw blade and a body to grip the reinforcing bars.

  At various construction sites, in order to connect rebars for use in concrete structures, conventionally, the rebars were double-layered and fixed with wire or the like. The method requires the operator to wind the wire many times around the outer periphery of the reinforcing bar and then bind it, which is cumbersome and not only makes the center of the reinforcing bar vertical nor tilted, but the strength of the wire is weak, so it is cut well and connected. There was an inconvenience that the state was released.

  In order to solve such a problem, a reinforcing bar connecting device (coupling device) for connecting the reinforcing bars easily and firmly by means other than a wire is being developed and used.

  By the way, most of the rebar connecting devices that have been developed in the past are systems in which the rebar is inserted into the housing and then the housing is fixed with screws, the structure is complicated, and it is difficult to connect the rebar. Inconvenience that requires a lot of time, effort and cost.

  In order to solve such problems, Korean Patent No. 0439305 (registration date: 2004.06.28.), Korean Patent No. 04622901 (registration date: 2004.12.08.), Korean Patent No. 1003302 Discloses a one-touch type rebar coupler that can easily connect rebars.

  However, the conventional one-touch type rebar coupler can provide a strong binding force when the ribs of the reinforcing bar are symmetrical, but it cannot provide a strong binding force for most reinforcing bars with asymmetrical ribs. There is. That is, in the reinforcing bar coupling device of the above-mentioned patent, when inserting a reinforcing bar having an asymmetrical rib, the rib on one side is firmly coupled, but the rib on the other side is not coupled, and the binding force is weak, and commercialization is possible. Not done. In addition, there is a high possibility that the deformation of the reinforcing bar connecting device and the loss of the ball will occur due to thermal deformation and other external forces, so there is a disadvantage that commercialization becomes impossible.

  Korean Patent No. 10-1039120 already filed and filed by the present applicant is for solving the problems of these conventional reinforcing bar couplers, as shown in FIG. 1 and FIG. The hollow portion 11 is formed by opening both ends so that the two reinforcing bars B are inserted, and the inner diameter of the hollow portion 11 is formed so that the inner diameter decreases from the inner side toward the outer side in the axial direction. A coupler body 10 having two tapered portions 12; arranged in the axial direction inside each of the tapered portions 12, movable in the axial direction, and so as to go from the inner side of the coupler body 10 to the outer side in the axial direction. A plurality of ball groups 30 composed of a plurality of balls 31, 32, 33, 34 having a small diameter; provided inside the coupler body 10, the ball group 30 extending axially from the inside An elastic member 40 for applying an elastic force to push out in the lateral direction; when the reinforcing bar B is inserted into the hollow portion 11 through the both end portions of the coupler body 10, the balls 31, 32, The rib R of the outer peripheral surface of the reinforcing bar B is inserted between the balls 33, 34 and the balls 31, 32, 33, 34, and the reinforcing bar B is detached by the wedge action of the balls 31, 32, 33, 34 and the tapered portion 12. It is possible to restrain so that there is no.

  However, such a ball-type one-touch coupler has a feature that it is easy to fasten and difficult to come off once fastened, but in the case of a reinforcing bar, if the tensile force is increased, the reinforcing bar will stretch and slip through. There is. In other words, if the joint between the reinforcing bar and the single piece is ball-shaped or has a gentle bend, even if the adhesion is extremely excellent, the bar of the reinforcing bar pushes out and separates the single piece, and the reinforcing bar tends to stretch The single piece is made of a material that can withstand high strength, and after joining the reinforcing bars, pulling the reinforcing bar in the opposite direction of insertion, the piece of the piece holding the reinforcing bar nodes It will push the reinforcing bar of soft nature, and the shape of the reinforcing bar will be deformed (the reinforcing bar will become thin, or the shape of the node will be crushed and deformed to come out), and eventually the desired tensile force will not be obtained The problem remained.

  The present invention has been devised to solve the above-described problems, and the object of the present invention is to securely and safely grip a reinforcing bar by the operation of a gripping portion in which a saw blade in a coupler is formed. Another object of the present invention is to provide a one-touch quick coupler for connecting reinforcing bars that is easy to manufacture, reduces material costs, and has excellent production cost and price competitiveness.

  The present invention relates to a one-touch quick coupler for connecting reinforcing bars, and includes a left and right body to which both ends of a reinforcing bar are inserted and fixed, and left and right grips provided inside the left and right body and gripping both ends of the reinforcing bar. In the reinforcing bar coupler for connecting the reinforcing bars, the left and right body are respectively composed of a front reinforcing bar insertion hole, a side wall, and a rear hole, and the rear parts of the left and right body are mutually connected, and the inner diameter of the side wall is The right and left gripping portions are also tapered, and the left and right gripping portion slopes interact with the slope of the inner diameter of the side wall. Since it acts, it is crimped so that the reinforcing bar does not detach, and the inner diameter part of the left and right gripping parts is formed with a sawtooth in the longitudinal direction, and the lower protrusion side of the sawtooth accommodates a node projection part of the reinforcing bar. Groove Made is characterized in that is.

  According to one aspect of the present invention, the left and right gripping portions are each divided into a plurality of sections, and the plurality of sections are arranged radially around the reinforcing bar insertion hole and divided into a plurality of sections. Between the sections of the left and right gripping parts, gripping part guides are inserted so as to correspond between the sections, forming a circle with a round cross section as a whole, and the inner diameter part of the left and right gripping parts is It is rounded so as to grip the reinforcing bar, both side surfaces are rounded convexly outward, and the outer diameter part is rounded convexly outwardly so as to contact the left and right body It is characterized by that.

  In the present invention, the rebar can be securely and safely gripped by the operation of the grip portion formed with the saw blade in the coupler, and the manufacturing cost is reduced and the material cost is reduced. Has an excellent effect.

It is a perspective view of the conventional coupler. It is a horizontal sectional view of the coupler of FIG. 1 is a longitudinal sectional view of a coupler according to the present invention. It is a horizontal sectional view of the coupler in the present invention. It is a partial notch figure of the holding part of the coupler in this invention. It is a longitudinal cross-sectional view of the holding part of the coupler in this invention. It is a bottom view of the holding part of the coupler in the present invention. It is a top view of the holding part of the coupler in the present invention. It is a longitudinal cross-sectional view of the holding part of the coupler of the other Example of this invention. It is a top view of the holding part of the coupler of the other Example of this invention. It is the figure which formed the uneven | corrugated groove | channel in the holding part of FIG. It is a figure which shows a mode that the fuselage | body of the coupler in this invention was fixed to the wall surface. It is a figure which shows a mode that the trunk | drum of the coupler in this invention was couple | bonded in T shape. It is a figure which shows a mode that the fuselage | body of the coupler in this invention was couple | bonded in + shape. It is a figure which shows a mode that the trunk | drum of the coupler in this invention was couple | bonded in the L shape.

  Hereinafter, preferred embodiments of a one-touch quick coupler for connecting reinforcing bars according to the present invention will be described in detail with reference to the accompanying drawings.

  Referring to FIGS. 3 to 8, the coupler of the present invention is provided in the left and right body 100, 200 in which both ends of the reinforcing bar 300 are inserted and fixed, and the left and right body 100, 200. It consists of left and right grips 110 and 210 to grip. The left and right sides are referred to as the left and right sides in FIG. 3 for convenience of explanation, and the actual left and right bodies and gripping portions have the same structure and function.

  The left and right trunks 100 and 200 interconnecting the reinforcing bars 300 are configured in the same manner from front reinforcing bar insertion holes 101 and 201, side walls 102 and 202, and rear holes 103 and 203, respectively. Further, since the rear portions of the left and right body 100, 200 are mutually connected, two reinforcing bars can be connected to each other.

  As a coupling method, the left and right bodies are manufactured, and then coupled by screw fastening, welding, or the like. Of course, in order to be able to separate, mainly one of the left and right fuselage is formed with a male screw on the outer periphery of the rear hole of the fuselage, and the other is formed with a female screw on the inner periphery of the rear hole of the fuselage Then, the method of mutual screw fastening is adopted.

  Further, the inner diameters of the side walls 102 and 202 are tapered, and the outer diameter portions of the left and right grips 110 and 210 are also tapered, so that the left and right grips 110 are arranged. , 210 are interoperated with the inclined portions of the inner diameters of the side walls 102 and 202 to cause a rusting action, so that the rebar 300 is pressed so as not to be detached. That is, even if the left and right rebars are pulled in a state where the rebars are connected, they are rather firmly bound by the wedge action and do not leave.

  Further, the left and right grips 110 and 210 are each divided into a plurality of sections, and the plurality of sections are arranged radially around the reinforcing bar insertion hole, and are divided into a plurality of sections. Between the sections of the gripping portions 110 and 210, gripping section guides 120 and 220 are inserted so as to correspond between the sections, forming a circle with a round cross section as a whole, and the left and right gripping sections 110, The inner diameter portion of 210 is rounded so as to grip the reinforcing bar, both side surfaces are rounded convex outward, and the outer diameter portion is convex outward so as to contact the body 100, 200. Have a round. There are at least two sections.

  In addition, in order to ensure the accuracy of the operation, the section can be formed with protrusions on both side surfaces, and a protrusion groove can be formed in the corresponding gripping part guide.

  In the present invention, the left and right bodies and the slices can be variously manufactured by a forging method, a pressing method, casting, or cutting using a mold. For the material of the left and right body, a material such as stainless steel having a strength higher than that of a reinforcing bar is used.

  In addition, a metal or plastic is used for the guide corresponding to each section of the grip portion. Further, the rear portions of the respective gripping portion guides 120 and 220 are connected to left and right guide plates 121 and 221 in which a plurality of small holes are radially drilled.

  Therefore, in the present invention, the side surface of the gripping portion is circular, and even if a force is applied in the lateral direction, the stress can be dispersed, so that no damage or deformation occurs. Thereby, it can endure extremely large strength, and sufficient performance can be ensured even if the grip portion is thin.

である。 Further, according to the present invention, sawtooth 600 is formed in the longitudinal direction at the inner diameter portions of the left and right grip portions 110 and 210. A groove 601 that can accommodate the node protrusion 301 portion of the reinforcing bar 300 is formed on the lower side of the saw tooth 600.

It is.

  The protrusion height of the protrusions of the reinforcing bars is almost constant, but there may be differences depending on the reinforcing bar manufacturer.Therefore, a space is provided inside the lower side of the saw blade to reduce the contact area when the height of the nodes is large. Can be prevented.

  The saw teeth 600 are formed in the longitudinal direction of the left and right grips 110 and 210 and are formed at intervals of ½ the pitch of the reinforcing bar node projections 301. Thereby, even if the node protrusions are formed with a deviation from the ribs formed on both sides of the reinforcing bar, it can be easily grasped. When manufacturing reinforcing bars, the node protrusions formed in the horizontal direction between the two protruding ribs (ribs) that are usually formed in the longitudinal direction are displaced in the longitudinal direction by a certain pitch across the two protruding ribs. And then marketed.

  Furthermore, left and right compression coil springs 130 and 230 are provided between the sections of the left and right grips 110 and 210 and the guide plate. When the reinforcing bar 300 is inserted and fixed, the left and right grips 110 and 210 are Works smoothly.

  In the present invention, as shown in FIGS. 9 and 10, the left and right grips 110 and 210 may be formed with a planar groove 601 a instead of the curved groove 601. Furthermore, as shown in FIG. 11, an uneven portion 602 by knurling can be formed in the planar groove 601a to reinforce the reinforcing bar contact area and pressure.

  Further, according to the present invention, a step is formed at the end of the left and right grips 110 and 210 at the end on the rebar direction side, and a step is formed correspondingly to the inner diameters of the left and right bodies 100 and 200. When 300 is pulled, the pressure applied between the left and right grips 110 and 210 and the left and right bodies 100 and 200 can be distributed.

  In addition, an inclination is formed at the end of the body 100, 200 on the outer diameter side of the reinforcing bar 300, and when constructing concrete, the mortar can be sufficiently filled without generating pores or empty spaces. .

  In addition, the present invention can be used not only to connect the left and right torso with the left and right grips and to connect the two reinforcing bars, but also as shown in FIGS. If necessary, it can be used to connect reinforcing bars by connecting to hollow tubes of tee (T) shape, cross (+) shape, and elbow (L) shape.

  Similarly, the left and right fuselage having the left and right grips are separated from each other, and as shown in FIG. 12, the left fuselage 100 alone or the right fuselage 200 is combined with the wall W and used alone. In this case, it is used when the reinforcing bar 300 is to be connected to the wall.

  The above-described embodiments of the one-touch quick coupler for connecting reinforcing bars according to the present invention are presented merely for illustrative purposes to help understanding of the present invention, and the present invention is not limited thereto. Those who have ordinary knowledge in the field to which they belong can make various modifications and implementations within the scope of the technical idea described in the appended claims.

  Therefore, according to the present invention, the rebar can be securely and safely gripped by the operation of the grip portion in which the saw blade in the coupler is formed, and it is easy to manufacture and the material cost is reduced. Has an excellent competitive effect.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a one-touch rebar coupler that connects rebars that form a framework of a work piece to each other or a wall body during construction work.

Claims (9)

The left and right bodies 100 and 200 to which both ends of the rebar 300 are inserted and fixed, and left and right grips 110 and 210 that are provided inside the left and right bodies 100 and 200 and hold both ends of the rebar 300, are provided. In the rebar coupler that connects
The left and right bodies 100 and 200 are respectively composed of front reinforcing bar insertion holes 101 and 201, side walls 102 and 202, and rear holes 103 and 203, and the rear parts of the left and right bodies 100 and 200 are mutually coupled. The inner diameters of the side walls 102 and 202 are tapered, and the outer diameter portions of the left and right grips 110 and 210 are also tapered and inclined. Since the inclined portion interacts with the inclined portion of the inner diameter of the side walls 102 and 202 and acts as a rust, it is pressure-bonded so that the rebar 300 is not detached, and the inner diameter portions of the left and right grip portions 110 and 210 are A sawtooth 600 is formed on the lower side of the sawtooth 600, and a groove 601 is formed on the lower side of the sawtooth 600.
The left and right grips 110 and 210 are each divided into a plurality of sections, and the plurality of sections are arranged radially around the reinforcing bar insertion hole, and are divided into a plurality of left and right grips. Between the sections of the sections 110 and 210, grip part guides 120 and 220 are inserted so as to correspond between the sections, forming a circle with a round cross section as a whole, and the left and right grip sections 110 and 210. The inner diameter part of the outer ring is rounded so as to grip the reinforcing bar, the both side surfaces are rounded convexly outward, and the outer diameter part faces the left and right body 100, 200 in the outer direction. One-touch quick coupler for connecting reinforcing bars, characterized by a rounded convex shape. Since the groove 601 is round, the shape of each cross-section of the sawtooth 600 is

The one-touch quick coupler for connecting reinforcing bars according to claim 1.   2. The one-touch for reinforcing bar connection according to claim 1, wherein the saw-tooth 600 is formed in a longitudinal direction of the left and right gripping portions 110 and 210 and is formed at a half interval of a pitch of the reinforcing bar protrusions 301. Type quick coupler.   The rear portions of the respective grip portion guides 120 and 220 are connected to left and right guide plates 121 and 221 each having a plurality of small holes formed radially, and the left and right grip portions 110 and 210 have sections. Compression coil springs 130 and 230 are provided between the left and right guide plates 121 and 221 so that when the reinforcing bar 300 is inserted and fixed, the left and right grips 110 and 210 operate smoothly. The one-touch type quick coupler for reinforcing bar connection according to claim 1.   2. The one-touch quick coupler for connecting reinforcing bars according to claim 1, wherein the left and right grips 110 and 210 have a flat surface instead of the groove 601.   6. The one-touch quick coupler for connecting reinforcing bars according to claim 5, wherein an uneven portion 602 by knurling is formed on the plane to reinforce the reinforcing bar contact area and pressure.   In the outer diameter of the left and right grips 110 and 210, a step is formed at the end portion on the rebar direction side, and the inner diameter of the left and right bodies 100 and 200 is also formed correspondingly, and when the rebar 300 is pulled, 2. The one-touch quick coupler for connecting reinforcing bars according to claim 1, wherein pressure applied between the left and right grips 110, 210 and the left and right bodies 100, 200 can be dispersed.   An inclination is formed at the end of the body 100, 200 on the outer diameter side of the reinforcing bar 300, and when the concrete is constructed, the mortar can be sufficiently filled without generating pores or empty spaces. The one-touch type quick coupler for reinforcing bar connection according to claim 1.   The left and right trunks 100 and 200 having the left and right grips 110 and 210 can be separated and used independently, and are separated from each other and attached to the wall by screw connection to rebar. 300 is attached to a wall, or is used to connect a reinforcing bar 300 by connecting to a hollow tube having a tee (T) shape, a cross (+) shape, and an elbow (L) shape. The one-touch quick coupler for reinforcing bar connection according to claim 1 or 5.

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