KR20070079990A - Reinforcing bar coupler - Google Patents

Abstract

A reinforcing bar coupler is provided to couple two reinforcing bars without play and a slip by covering reinforcing bars with a pair of coupling pieces and compressing a pair of coupling pieces with a sleeve. The invention relates to a reinforcing bar coupler for coupling two reinforcing bars simply and strongly by covering up the ends of two reinforcing bars(1,1a) which put in contact with each other in a straight line using a pair of coupling pieces(2), inserting a sleeve(3) to the outer circumferential surface of a pair of the coupling pieces and compressing the coupling pieces, and removing play of a joint and a slip in a joint against tensile and compressive load added from the outside after connecting reinforcing bars by placing grout materials in the inside of the sleeve and filling up a gap between the reinforcing bars and the coupling pieces.

Description

Reinforcing bar coupler {Reinforcing bar coupler}

1 is an exploded perspective view showing a first embodiment of the present invention.

Figure 2 is a perspective view of the engaged state showing a first embodiment of the present invention.

Fig. 3 is a longitudinal sectional view of the engaged state showing the first embodiment of the present invention.

Figure 4 is a front view showing a bonded state of the deformed reinforcing bar consisting of a semi-circular column in the first embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a longitudinal cross-sectional view of FIG. 4.

7 is a plan view showing a coupling state of a pair of coupling pieces covering a deformed reinforcing bar consisting of a semi-circular section in the first embodiment of the present invention.

8 is an exploded perspective view showing a second embodiment of the present invention.

9 is a perspective view of a coupled state showing a second embodiment of the present invention.

Fig. 10 is a longitudinal sectional view of the engaged state showing the second embodiment of the present invention.

11 is an exploded perspective view showing the third embodiment of the present invention.

12 is a perspective view of a coupled state showing a third embodiment of the present invention.

Fig. 13 is a longitudinal sectional view of the engaged state showing the third embodiment of the present invention.

14 is an exploded perspective view showing a fourth embodiment of the present invention.

15 is a perspective view of a coupled state showing a fourth embodiment of the present invention.

Fig. 16 is a longitudinal sectional view of the engaged state showing the fourth embodiment of the present invention.

17 is an exploded perspective view showing the fifth embodiment of the present invention.

18 is a perspective view of a coupled state showing a fifth embodiment of the present invention.

Fig. 19 is a longitudinal sectional view of the engaged state showing the fifth embodiment of the present invention.

20 is an exploded perspective view showing the sixth embodiment of the present invention.

21 is a perspective view of a coupled state showing a sixth embodiment of the present invention.

Fig. 22 is a longitudinal sectional view of the engaged state showing the sixth embodiment of the present invention.

FIG. 23 is a perspective view illustrating a state in which a combination of a pair of coupling pieces and a sleeve integrated in a sixth embodiment of the present invention is fastened to a single screw node rebar. FIG.

24 is a perspective view illustrating a state in which a combination of a pair of coupling pieces and a sleeve integrated in a sixth embodiment of the present invention is fastened to another threaded bar reinforcing bar;

25 is an exploded perspective view showing a conventional technology.

It is a front view of the engagement state which shows the prior art.

FIG. 27 is a cross-sectional view taken along line B-B in FIG. 26.

Fig. 28 is a longitudinal sectional view of the engaged state showing the prior art.

FIG. 29 is a front view illustrating a bonded state of a deformed steel reinforcing bar having a semi-circular section in the related art. FIG.

30 is a cross-sectional view taken along the line C-C of FIG.

Fig. 31 is a longitudinal sectional view showing a state of engagement of a deformed rebar made of a semi-circular section in the prior art.

Fig. 32 is a plan view showing a coupling state of a pair of coupling pieces covering a deformed rebar made of a semi-circular section in the prior art.

<Description of Drawing>

1, 1a: Rebar (Deformed Rebar)

1c, 1d: screw bar rebar

11: rib 12: nodes

13: screw node

2, 2a, 2b, 2c: binding fragment

21: slope 22: edge

23: node groove 23a: screw node groove

24: center groove 25: ruler

26: engaging portion 27: spline

3, 3a, 3b, 3c: sleeve

31: slope 32: edge

33: hitting part 34: small diameter part

35: large diameter 36: filling hole

37: engaging portion 37a: tapped hole

38, 38a: opening 39: rib

4: Absorb bolt

5: wedge

51: inclined portion 52: male threaded portion

53: tip 54: blow

5a: washer 5b: nut

6: spacer

61: elastic through hole

200: binding body

201: Tapered surface 202: Node groove

300: sleeve

400: break

The present invention relates to a reinforcing bar connector, the inner surface and the outer surface of the cross section is a circular arc shape close to the semi-circular shape is formed with a slope in the longitudinal direction on the outer surface and a pair of coupling grooves provided with a plurality of node grooves to be seated on the inner surface And a pair of coupling pieces covering the ends of the two bars with a sleeve formed to cover the ends of the two bars in a straight line, and then having an inclined surface having the same inclination angle as the inclined surface of the coupling piece in the longitudinal direction on two opposite surfaces thereof. It relates to a mechanical joint reinforcing bar connector that is connected to the outer circumferential surface of the rod and connects the reinforcing bar simply and securely.

In general, the reinforcing bar used as a frame in the construction of reinforced concrete structures is mostly connected because it is produced in a limited length for the convenience of transportation or reinforcement work, there are a number of ways of connecting the reinforcing bar as shown below.

The most common way of connecting reinforcing bars is the overlapping method of overlapping the ends of two rebars.This is simply by overlapping the ends of the reinforcing bars to a fixed length and binding them with a binding line to temporarily fix them. This method is inferior in safety because the joint depends solely on the adhesion of the reinforcing bar, and the gas pressure welding method in which the end of the bar is heated with an oxygen acetylene gas flame and pressurized with a crimp to connect the bars in a straight line is connected to the joint. Secondary stress caused by deformation causes the joint to be more vulnerable than the rebar base, and the ribs and nodes are rolled by upsetting both ends of the reinforcing bars or by forging, and then the cross section is processed circularly, and then the male thread is processed by cutting or rolling. The threaded connection method with female coupler The external force is applied to the end of the reinforcing bars, which makes the joints different from the rebar base material, making them more vulnerable than the base materials, which makes the process of screwing the rebars difficult and time-consuming, and requires a lot of work difficulties in rotating long bars. have.

As another joint method, there is a joint joint method for connecting using a bar projecting in the transverse direction on the outer circumferential surface of the reinforcing bar, which has been presented in various ways, one example of which is shown in Figures 25 to 32, The semi-cylindrical shape has a plurality of node grooves 202 into which the bars of reinforcing bars are fitted, and the outer surface is a pair of coupling pieces 200 having a tapered surface 201 formed of a taper while the radius gradually increases from one end to the other end. The ends of the rebars (1, 1a) butt lined up to cover the bar 12 of the reinforcing bar to be seated in the node grooves 202 of the coupling piece 200, and then the inner surface in a cylindrical form from one end to the other end As long as the cover covers the ends of the two reinforcing bars (1, 1a) with the sleeve 300 is formed with a tapered surface 301 made of a taper having the same angle as the outer surface of the coupling piece 200 The coupling of the coupling pyeonche 200 inlay fitted to the outer peripheral surface of the pair of pyeonche 200 has a back-audio by way of blotting paper in the direction of the center axis of the reinforcing bar connecting the reinforcement.

However, in order to apply such a conventional jointed joint method, it is possible to apply a joint forming position in which the deformed reinforcing bars to be connected centering on two ribs are unified in one way. The spacing and height of the nodes and the diameter of the reinforcing bar are to be manufactured within the tolerance range, but the positions of the nodes formed laterally around two ribs formed in the symmetrical direction over the entire length in the longitudinal direction 25 to 25 because the position of the node is formed in a columnar form formed at the same position with respect to the two rows of ribs, and a semi-circular shape with a staggered position between the two rows of ribs is different. As shown in FIG. 28, the pair of coupling pieces 200 facing the ends of the two rebars 1 and 1a are covered. When the formation position of the node groove 202 coincides with the position of the node 12 of the reinforcing bar, as shown in FIG. 28, both ends of the pair of coupling pieces 200 are aligned in a longitudinal cross-sectional view as shown in FIG. The outer circumferential surface of the coupling piece 200 and the inner circumferential face of the sleeve 300 are in close contact with each other, and as shown in FIG. 27, the outer circumferential face of the coupling piece 200 and the sleeve 300 are also in cross-sectional view. Although the inner peripheral surface is in close contact with a stable structure, as shown in Figs. 29 to 32, if the bar 12 of the connecting reinforcing bar is formed differently from the design of the coupling piece 200, Figs. As shown in the longitudinal cross-sectional view and a plan view of the coupling state of the pair of coupling pieces, both ends in the longitudinal direction of the pair of coupling pieces 200 do not coincide with each other and are alternately arranged so that the outer circumferential surface of the coupling piece 200 and the sleeve 300 are separated. There is a gap between the inner circumference While the sleeve 300 is in close contact with the coupling piece 200 and cannot be pressed, the joint of the reinforcing bar becomes poor, and as shown in FIGS. 29 to 30, the outer diameter of one coupling piece 200 on the same cutting line. Since the outer diameter of the other large coupling body 200 is opposed to each other in a small state, only the apex of the outer circumferential surface of the coupling body 200 having a small outer diameter is in contact with the inner circumferential surface of the sleeve 300 and both edge portions in the transverse direction are sleeves. There is a 300 and the gap 400 and the outer side of the coupling piece 200 has a large outer diameter, only the edges of both ends of the transverse direction are in contact with the inner circumferential surface of the sleeve 300 so that the apex is generated by the sleeve 300 and the gap 400. Therefore, since the inner circumferential surface of the sleeve 300 is not closely pressed while the inner circumferential surface of the pair of coupling pieces 200 is completely in contact with each other, the coupling piece 200 also becomes an unstable structure in which the rebar is not completely pressed.

Although not shown, in a joint joint method consisting of a pair of coupling pieces and a sleeve, when the pair of coupling pieces covers the ends of two reinforcing bars, the outer circumferential surfaces of the two coupling pieces are connected to each other and one garden is laterally connected. Since the inner circumferential surface of the sleeve, which is made of through holes in the garden, is pressed in a state where the inner circumferential surface of the sleeve is completely in contact with the outer circumferential surface of the coupling piece, the coupling piece is designed to stably reinforce the rebar to connect the rebars. If the diameter of the pair is larger than the diameter of the reinforcing bar, which is the standard when designing the pair of coupling pieces and the sleeve, the pair of coupling pieces covers the reinforcing bar and is separated from the outer circumferential surface of the two coupling pieces by connecting the outer circumferential surface. Form an ellipse rather than a garden in the transverse direction, which causes the sleeve to be fitted to a pair of coupling pieces The press-in depth is smaller than the design and the sleeve is pressed only in the form of a line connecting the vertices of the outer circumferential surface of the coupling body in the longitudinal direction. When a tensile load is applied, both edges of the coupling piece exert a transverse force, so that the bars of the reinforcing bar can be separated from the joint grooves of the coupling piece. If the diameter of the rebar is smaller than the diameter of the reinforcing bar, the paired coupling body covers the reinforcing bar, and the distance between the outer peripheral surfaces of the two coupling pieces becomes closer to the design dimension, forming an ellipse and forming an ellipse. Only the edges of both sides contact the inner circumferential surface of the sleeve in the form of a line in the longitudinal direction and the apex of the outer circumferential surface Boone is in an unsafe state where a gap occurs between the inner surface of the sleeve.

As described above, the conventional joint joint method consisting of a pair of coupling bodies and sleeves is to be prepared by connecting only the reinforcing bars in accordance with the design standards of the coupling pieces and sleeves to be a stable coupling, in the current standards for rebar manufacturing Two rolling rollers with indented nodular grooves are engaged to rotate, allowing for the variation of the bar shape of the rebar and the diameter of the reinforcing bar, and forming the bar of the bar on the outer circumference of the rebar. In this case, it is difficult to precisely match the two rolling rollers so that the grooves formed in the two rolling rollers can be made into the unified node shape, and the bar shape of the reinforcing bar is included in the specification for the rebar manufacturing. Since it is not made, it will not be produced in one bar It is hard to apply as an enemy.

The present invention is to solve the problems of the conventional reinforcing bar joint method to provide a reinforcing bar connector of the one-piece joint method to connect the reinforcing bars simply and firmly with a pair of coupling pieces and the sleeve made of the same structure, the purpose of the connection It accepts all of the various bar shapes and diameter variations of the reinforcing bars, and firmly connects them, and provides joints of reinforcing bars that do not slip at the joint even when tensile and compressive loads are applied to the connected bars. To reduce the gaps and slips of the joints, and to form a pair of coupling pieces in the same structure to provide easy reinforcement connectors for easy manufacturing, cost reduction, and easy part management and construction when used in the field. have.

In order to achieve the above object, the present invention, the inner surface and the outer surface of the cross section is made of an arc shape, the inner surface is made of a circular arc distance that can cover about half of the rebar in the transverse direction and the groove of the reinforcing bar is inserted into the inner surface The outer surface is formed in the inclined surface having one inclination angle from one end to the other end in the longitudinal direction, the transverse width of both sides of the transverse direction of the outer surface is formed in the plane and the transverse width consisting of the distances of the both sides of the transverse direction in the total length Having a pair of coupling pieces which are identical in length and are of such a length as to cover a plurality of rebar knots, covering the ends of the two rebars in a straight line so that the bars of the reinforcing bars fit all the grooves of the coupling pieces, The coupling piece can be squeezed when it is inserted into the outer circumferential surface of the pair of coupling pieces covering the ends of the two bars. It is formed as a hollow tube so that the two surfaces in the symmetrical direction in contact with the inclined surface of the pair of coupling pieces are formed in the longitudinal direction with a slope having the same inclination angle as the inclined surface of the coupling piece and in contact with the edge surface of the coupling piece The two faces in the direction are longitudinally formed in a plane over the entire length and are formed in a length similar to that of the coupling piece, and are inserted into the outer circumferential surface of the pair of coupling pieces covering the ends of the two reinforcing bars to couple the connecting pieces to the reinforcing bars. It is characterized by providing a reinforcing bar connector for connecting the reinforcing bars by pressing in the direction of the central axis.

The present invention is to easily and firmly connect the reinforcing bar using the principle of the wedge, the inclined surface of the sleeve and the inclined surface of the coupling piece to form the same inclination angle, and the transverse width of the inclined surface of the sleeve and the coupling piece the same over the entire length of the inclined surface When the cross section of the inclined surface is formed in an arc shape, it is essential to form the same radius over the entire length of the inclined surface.If the bar shape of the reinforcing bar is different from the design standard of the coupling body, a pair of coupling bodies Even if the distance between the outer slopes of the pair of coupling pieces covering the reinforcing bars of larger or smaller diameter than the design due to staggered longitudinally or the deviation of the diameter of the reinforcing bars covering the ends of the two rebars, Since the inclination angle of the inclined surface of the coupling piece does not change, it has the same inclination angle as the pair of inclined surfaces. The slopes of the pair of coupling pieces are always pushed while the slopes of the pair of coupling pieces slide in a state where the sleeves are in close contact with each other, as long as the slopes of the sleeves formed on the inner surface of the pair are coupled to the outer circumferential surface of the pair of coupling pieces. You can connect.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 are a perspective view and a cross-sectional view according to a first embodiment of the present invention.

According to the drawings, the first embodiment of the present invention comprises a pair of coupling pieces 2 and one sleeve 3 having the same structure, and a pair of ends of the two reinforcing bars 1 and 1a in a straight line. Cover with a coupling piece (2) facing each other and the sleeve (3) is inserted into the outer peripheral surface of the pair of coupling pieces (2) to press the coupling piece (2) to connect the two reinforcing bars (1, 1a) simply and firmly The grout material is filled into the sleeve 3 to fill the gap between the reinforcing bars 1 and 1a and the coupling piece 2 to remove the play of the joint, and after connecting the reinforcing bars 1 and 1a. It provides a reinforcing bar connector that completely eliminates the slip that occurs at the joint against tensile and compressive loads applied at.

The coupling piece 2 has a length for fixing a plurality of reinforcing bar 12 to the inner surface and the inner and outer surfaces of the cross section are both arc-shaped, the inner surface of the cross section is an arc length that can cover from one rib of the rebar to the opposite rib And the transverse width of the outer surface is longitudinally the same over the entire length, and the outer surface is inclined at one inclined angle constant from one end to the other end over the entire length in the longitudinal direction and is formed with both side edges in the transverse direction. (22) is planar, the upper side of the boundary line with the inclined surface 21 is inclined, the inner surface is formed with a plurality of node grooves (23) into which the nodes 12 of the reinforcing bars (1, 1a) is fitted, the middle portion in the longitudinal direction Deeper and wider center groove 24 is formed than the depth of the node groove 23 is formed so that the front end portion of the connecting bar is bent or even enough to accommodate the projection.

Forming a ruler (25) is displayed on the thick end of the outer surface of the coupling piece (2) at regular intervals and the order number is a pair of coupling pieces during the first connection when the reinforcing work of the same standard ( The fitting pressure of the sleeve (3) fitted on the outer circumferential surface of 2) is taken as a reference while looking at the ruler so that subsequent connection work can be driven to the same insertion depth to ensure the safety of the jointed state of the joint. To facilitate the inspection of the.

In the structure of the pair of coupling pieces 2, the transverse width is the same over the entire length, both the arc length and the radius of the inclined surface are the same over the entire length, and both edge surfaces 22 of the outer surface maintain the plane, In the structure of the sleeve 3 to be described later, the arc length and the radius of the two inclined surfaces 31 contacting the two inclined surfaces 21 of the pair of coupling bodies 2 are the same over the entire length, and the coupling bodies 2 The two edge surfaces 32 in contact with the edge surface 22 of the (1) are kept flat and the width between the two edge surfaces 32 is the same over the entire length, thereby providing a pair of coupling pieces proposed in the prior art. The inner surface of the sleeve is the most important component that is distinguished from the taper that has a larger radius from one end to the other end and the transverse width of the sleeve. .

The sleeve 3 has a cylindrical shape and has a length similar to that of the coupling body 2, and the inner surface is divided into four sides when viewed in a transverse direction. The two facing sides are a pair of coupling pieces surrounding the ends of the reinforcing bars. An inclined surface 31 having the same inclination angle in the longitudinal direction as the inclined surface 21 of (2) is formed, and the transverse width of the inclined surface 31 is slightly larger than the transverse width of the coupling piece 2, and the transverse width and the arc distance and radius The same length is formed over the entire length so that the interval between the two inclined surfaces 31 at one end becomes a narrow small-diameter portion 34 and the interval between the two inclined surfaces 31 at the other end becomes a large large-diameter portion 35. Both surfaces are formed in the same plane over the entire length of the edge surface 32 in the same plane as the edge surface 22 of the pair of coupling pieces 2 surrounding the end of the reinforcing bar.

The spacing of the two inclined surfaces 31 of the sleeve 3 is the bar 12 of the reinforcing bar when the entire length is completely inserted into the outer peripheral surface of the pair of coupling pieces 2 surrounding the ends of the two rebars It is appropriately formed so as to be fully engaged with the node groove 23 of 2).

The gap between the two edge surfaces 32 of the sleeve 3 is formed to be slightly larger than the width between the edge surfaces 22 of the pair of coupling pieces 2 so that the sleeve 3 is coupled to the coupling piece 2. The frictional resistance does not occur when it is inserted into, and the impact portion 33 protruding outwardly is formed at the end of the small diameter portion 34 to strike when the sleeve 3 is inserted into the coupling piece 2. And a tab (37a) penetrated inwardly in the small-diameter portion (34) to fasten the spigot bolt (4) having a pointed end and the sleeve (3) fully fitted to the outer circumferential surface of the pair of coupling pieces (2) ) Does not fall in the reverse direction.

Filling holes 36 penetrated therein to fill the grout material in the middle portion of the longitudinal direction of the sleeve 3 to form a pair of coupling pieces 2 and the sleeve 3 After connecting and filling the grout material therein through the filling hole 36, the bars of the reinforcing bars 1 and 1a and the coupling pieces 2 are filled and hardened, and the nodes of the bars 12 and the coupling pieces 2 of the reinforcing bars are hardened. The clearance between the grooves 23 is removed and no slip occurs at the joint with respect to external tensile and compressive loads to prevent the surrounding concrete from cracking.

In the inclined surface 21 and the inclined surface 31 of the sleeve 3 of the coupling piece 2 of the first embodiment of the present invention, even if the cross-sectional shape is formed in a plane or a polygon rather than an arc shape as described above, its function Is the same and can be formed in various shapes. In addition, the outer surface of the sleeve 3 can also be formed in a cross-section circular or polygonal, or a complex combination of arc and polygon and can be formed in various applications.

In particular, as shown in Figures 4 to 7 in the embodiment of the present invention, the node 12 represents a state in which the bars (1, 1a) formed in a semi-circle staggered with each other based on two ribs 11 As a result, the pair of coupling pieces 2 are also staggered from each other along the reinforcing bar 12 of the reinforcing bars so that both ends thereof do not coincide, but the inclined surface 31 and the coupling pieces 2 of the sleeve 3 over the entire length thereof. Since the inclined surface 21 is made of the same inclination angle, even if the pair of coupling pieces 2 presses the reinforcing bars alternately, as shown in FIG. 6, the inclined surface 21 is in the longitudinal direction of the inclined surfaces 31 of the pair of coupling pieces 2. The angle of inclination is always the same even if the ends of the pair of coupling pieces 2 coincide or do not coincide with each other, and the inclination angles in the longitudinal direction of the inclined surface 31 of the sleeve 3 in contact with each other are also the same, so that they are fitted to the pair of coupling pieces 2. Depth of driving sleeve (3) In this way, the sleeve 3 always completely presses the pair of coupling pieces 2 so that there is no gap between the inclined surfaces 21 and 31 of the two members 2 and 3, and the pair of coupling pieces is always in close contact. The entire inclined surface 21 of (2) is supported by the entire inclined surface 31 of the sleeve 3 to completely press the reinforcing bar, and as shown in FIGS. 5 and 7 of the pair of coupling pieces 2 Since the transverse width is the same over the entire length and the radius of the inclined surface 31 of the sleeve 3 and the inclined surface 21 of the engaging piece 2 is the same, the inclined surfaces 21, 31 of the two members 2, 3 are longitudinally separated. Even if it slides in the direction, there is no gap at all the contact surfaces and complete coupling is always performed, so that the sleeve 3 completely presses the tack member 2 and the diameter of the reinforcing bars 1 and 1a that connects them. Distance between the inclined surfaces 21 of the pair of coupling pieces 2 when connecting the reinforcing bars having a diameter larger than the reference dimension. Away from the sleeve 3 in the pair of coupling pieces 2, the inclined surface 21 of the coupling piece 2 and the inclined surface 31 of the sleeve 3 are completely in contact with each other, When connecting the reinforcing bar of smaller diameter, the distance between the inclined surfaces 21 of the pair of coupling pieces 2 is closer, so that the sleeve 3 is driven into the pair of coupling pieces 2 more than the standard. 2) Since the inclined surface 21 and the inclined surface 31 of the sleeve 3 are completely in close contact with each other, even if there is a deviation in the diameter of the reinforcing bar, it always provides a secure joint.

Referring to the coupling method and the effect according to the configuration of the first embodiment of the present invention as follows.

First, the small-diameter 34 is inserted into the first reinforcing bar 1 to be connected, and the sleeve 3 is fitted, and the pair of coupling pieces 2 are joined to each other by abutting the ends of the two bars 1 and 1a. Cover (1, 1a) facing the front end of the reinforcing bar (12) while inserting the bar 12 of the reinforcing bar in the inner groove (23) so that the end of the reinforcing bars (1, 1a) is located in the center groove and one reinforcing bar (1) The sleeve 3 pre-fitted to the outer circumferential surface of the pair of coupling pieces 2, and then strikes the striking portion 33 with a hammering tool, and the inclined surface 31 of the sleeve 3 is coupled to the coupling piece 2. While holding the inclined surface 21 of the coupling piece (2) at the same time by the principle of the wedge to press the reinforcing bars (1, 1a) to connect the reinforcing bars simply and firmly.

In addition, the blotting bolt 4 is fastened to the tab hole 37a of the sleeve 3 to prevent the sleeve 3 from falling out from the coupling piece 2 in the opposite direction, and the grout material is filled through the filling hole 36. The grout material is filled and hardened in the space between the gap between the bar 12 of the reinforcing bar 12 and the nod groove 23 of the coupling piece 2 and the ends of the two bars 1 and 1a. The compression and tensile loads acting on the reinforcing bars prevent slippage at the joints.

8 to 10 are a perspective view and a cross-sectional view according to a second embodiment of the present invention.

According to the figure, the second embodiment of the present invention consists of a pair of coupling pieces 2a and one sleeve 3, the basic structure of which is the same as the first embodiment of the present invention, and only one pair Another feature is that the screw node groove 23a is formed on the inner surface of the coupling piece 2a of the screw node rebars 1c and 1d to which the screw node 13 is fastened.

Until now, threaded bar reinforcing bars are threaded on the outside and are fastened by couplers with female threaded parts.The pitch of the threaded bar of the rebar is long and the shape of the screw is not precise, so the coupler's female thread is smoothed. Since the screw thread of the part is formed larger than the screw bar of the rebar, when the ends of the two bars are connected with the coupler, there is a lot of play between the coupler and the threaded bar, so the fastening is easily released and slip occurs at the joint. The gap is removed by tightening the nut and filling the grout material inside the coupler.

However, the connection of the screw node reinforcement by the conventional coupler as described above has a difficulty in fastening while rotating the long reinforcing bar, and the lock nut is also fastened to the screw node reinforcement, so that it is easy to loosen and the play of the joint is not completely removed. However, in the inner surface of the pair of coupling pieces 2a of the second embodiment of the present invention, the screw node groove 23a is formed at the same angle as the screw node 13 of the reinforcing bar so as to be accurately engaged with the screw node of the screw bar reinforcement without play. Cover the ends of the two screw bars (1c, 1d) with a pair of coupling pieces (2a), and the sleeve (3) is sandwiched and connected to each other, so that the screw nodes 13 and the coupling pieces of the screw bars (1c, 1d) There is no play between the threaded grooves 23a of 2a) to prevent slippage of the joint. In addition, if the sleeve (3) is fitted to the pair of coupling pieces (2a) without rotating the screw bar reinforcement, the connection is simply completed, the construction is simple and quick.

Coupling method and effect according to the configuration of the second embodiment of the present invention is the same as the first embodiment of the present invention.

11 to 13 are a perspective view and a cross-sectional view according to a third embodiment of the present invention.

According to the figure, the third embodiment of the present invention consists of a pair of coupling pieces 2b and a sleeve 3a, the basic structure of which is the same as that of the first embodiment of the present invention, and only one pair A plurality of splines 27 protruding in a band shape over the entire length of the inclined surface 21 of the coupling piece 2b of the to reduce the frictional resistance with the inclined surface 31 of the sleeve 3a, A saw blade-shaped engaging portion 26 is engraved on the outer surface of the thin end portion of the engaging piece 2b, and is embossed on the inclined surface 31 on the small-diameter portion 34 side of the sleeve 3a. A locking portion 37 is formed to be fitted to the outer circumferential surface of the pair of coupling pieces 2b covering the ends of the two reinforcing bars 1 and 1a while being engaged with the locking parts 26 of the coupling piece 2b. Another feature is that 3a) is prevented from falling in the reverse direction, and the texture according to the configuration of the third embodiment of the present invention It is another feature methods and operations and effects are the same as in the first embodiment of the present invention, and just do not have a tapped hole in the sleeve (3a) that do not enter into the blotter bolts 4.

14 to 16 are a perspective view and a cross-sectional view according to a fourth embodiment of the present invention.

According to the figure, the fourth embodiment of the present invention consists of a pair of coupling pieces 2b and one sleeve 3b, the basic structure of which is the same as that of the third embodiment of the present invention, In 3b), the openings 38 and 38a penetrating inwardly are formed in the longitudinal middle portions of the two edge surfaces 32 and the two inclined surfaces 31, and the tip portion 53 is formed in a wedge shape having a sharp end. Washer fitted to the wedge 5 and the male screw portion 52 of the wedge 5 in which the inclined portion 51 formed with the inclined portion 51 is formed and becomes thicker from the tip portion 53 to the striking portion 54. 5a and a nut 5b are further provided to cover the ends of the two reinforcing bars 1 and 1a with a pair of coupling pieces 2b, to sandwich the sleeve 3b, and then to the edge surface of the sleeve 3b. The wedge 5 is inserted into the space between the ends of the two reinforcing bars 1 and 1a through the two-part openings 38 formed in the 32, and is formed by the inclined portions 51 of the wedge 5. Push the reinforcing bars 1 and 1a in both ends to remove the fine play between the bar 12 of the reinforcing bars and the bar grooves 23 of the coupling piece 2b and at the same time the compressive load applied to the two bars 1 and 1a. Another feature is to prevent the wedge 5 from falling in the opposite direction by acting to resist and insert the washer (5a) in the male screw portion 52 of the wedge (5) and tighten the nut (5b).

Coupling method and operation effect according to the configuration of the fourth embodiment of the present invention above is the same as the first embodiment of the present invention and only restrains the pair of coupling pieces 2b with the sleeve 3b and then the wedge 5 Another feature is that the gap between the end of the two reinforcing bars (1, 1a) from the opening 38 is completely removed.

17 to 19 are a perspective view and a sectional view according to a fifth embodiment of the present invention.

According to the figure, the fifth embodiment of the present invention consists of a pair of coupling pieces 2b and one sleeve 3c, the basic structure of which is the same as that of the fourth embodiment of the present invention, Ribs 39 having the same shape as the ribs and bars of the reinforcing bar are added to the outer surface of 3c) to improve adhesion to concrete, and the vicinity of the striking part 33 in the small-diameter portion 34 of the sleeve 3c in the longitudinal direction. It is formed so as to protrude more so that the hitting portion 33 is inward than the small diameter portion 34 even if the hitting the hitting portion 33 with a blow tool to fit the sleeve (3c) to the outer surface of the pair of engaging pieces (2b) Another feature is not to be further recessed, the bonding method and the effect is the same as the fourth embodiment of the present invention.

20 to 24 are perspective and sectional views according to the sixth embodiment of the present invention.

According to the figure, the sixth embodiment of the present invention consists of a pair of coupling pieces 2c and a sleeve 3c, the basic structure of which is the same as that of the fifth embodiment of the present invention, and only one pair On the inner surface of the coupling piece (2c) of the threaded groove (23a) is formed, which is fastened to the screw node 13 of the screw node reinforcing bars (1c, 1d) without a node groove and a center groove into which the bar of the rebar is fitted, The inner surface of the pair of coupling pieces (2c) is formed in the middle portion in the longitudinal direction in the transverse direction, the two sides of the coupling groove (28) consisting of grooves on both sides is formed elastically elastic material inside the coupling groove (28) In addition, the spacer 6 is provided with a plurality of elastic holes 61 made of a through hole so as to enhance the elasticity is further provided and inserted, in particular, screw node reinforcement on the inner surface of the coupling piece (2c) (1c, 1d) screw joints (13) with no play A lock screw groove 23a is formed in the same manner as the screw node 13 of the screw bar reinforcing bars 1c and 1d, and the sleeve 3c is loosely fitted on the outer circumferential surface to form a combination, and then the two screw bar reinforcing bars 1c are formed. , 1d) and the sleeve 3c are fully inserted and connected so that there is no play between the screw node 13 of the screw bar reinforcing bars 1c and 1d and the screw node groove 23a of the coupling piece 2c. There is no slip at the joint.

The coupling method and the effect according to the configuration of the sixth embodiment of the present invention are as follows.

First, the pair of coupling pieces 2c are loosely coupled to the sleeve 3c to form a coupling state, thereby integrating the coupling pieces 2c into two coupling grooves 28 of one coupling piece 2c. A pair of coupling pieces 2c in which a pair of coupling pieces 2c is faced to each other by inserting the other coupling pieces 2c into the spacers 6 and facing each other by the spacers 6c. The sleeve 3c is loosely fitted to the outer circumferential surface of the c), and the pair of coupling pieces 2c is maintained in a state in which the pair of coupling pieces 2c is not completely in contact with each other by the resistance of the spacer 6.

Next, as a step of connecting the screw node reinforcing bars (1c, 1d) in the field, as shown in Figure 23, a combination of a pair of coupling pieces (2c) and the sleeve (2c) to one screw node reinforcement (1d) Is fastened to the entire length of the reinforcing bar end, and then a pair of coupling pieces fastened to the one screw node reinforcing bar 1d while facing the other threaded bar reinforcing bar 1c as shown in FIG. Rotate the combination of 2c and sleeve 2c in the opposite direction to fasten the other threaded bar reinforcement 1c to connect the two reinforcing bars 1c and 1d, and strike the striking tool 33 of the sleeve 2c. Completely screwed together by hitting with a back to connect the threaded reinforcing bars simply and firmly, and prevent slippage at the joints.

In the first to sixth embodiments of the present invention, the sleeve and the sleeve fitted to the pair of coupling pieces are the same even if applied interchangeably, the two sleeves by removing all the middle portion of the longitudinal direction of the sleeve It may be provided to be fitted to the outer circumferential surface of the pair of coupling pieces in one direction, and the effect thereof is the same as the embodiments of the present invention, but the sleeve is separated into two, it is inconvenient to fit the pair of coupling pieces. .

Although the present invention has been described with reference to various preferred embodiments, the present invention is not limited thereto and various modifications can be made by those skilled in the art to which the present invention pertains within the technical scope of the present invention. Although the technical idea is the same as the present invention.

As described above, the present invention covers the ends of the two rebar with a pair of coupling pieces made of the same structure and the sleeve is fitted to the outer surface of the pair of coupling pieces to press the coupling pieces to connect the reinforcing bars simply and firmly Even if the bar of the reinforcing bar is a columnar or staggered semicircle with two rows of ribs as the center, it accepts and connects firmly, and the difference in the diameter of the reinforcing bar is different from the indentation depth of the sleeve that fits the outer circumferential surface of the coupling body. It is applied to the joint of threaded bar reinforcement to form the threaded groove of the coupling piece at the same angle as the threaded bar of the reinforcing bar, so that the threaded joint of the reinforcing bar and the threaded joint of the connecting piece can be engaged without the play. This action prevents slippage, and the end of the reinforcing bar is filled with a crout or filled with wedges. It eliminates the gap between the rebar and the coupling piece, which prevents slippage even when tensile and compressive loads are applied to the joint to prevent cracking of the concrete around the joint. Because of this, manufacturing cost can be reduced, and parts management and construction are convenient.

Claims (16)

In the reinforcing connector consisting of a pair of coupling pieces covering the outer circumferential surface of the reinforcing bar and a sleeve inserted into the outer circumferential surface of the pair of coupling pieces to hold the pair of coupling pieces, the inner surface of the pair of coupling pieces has a circular cross section. The outer surface is formed in the inclined surface 21 inclined from one end to the other end in the longitudinal direction, the transverse width is formed the same over the entire length, the sleeve is formed of a hollow tube, the two sides of the symmetrical direction in the longitudinal direction Reinforcing bar connector, characterized in that formed in the inclined surface 31 having the same inclination angle as the inclined surface of the coupling piece. The inner surface of the pair of coupling pieces 2 is formed with a plurality of nodal grooves 23 into which the nodes 12 of the reinforcing bars 1 and 1a are fitted. Reinforcing bar connector, characterized in that the center groove 24 is formed deeper and wider than the depth of the node groove (23). 2. The reinforcing bar connector according to claim 1, wherein a plurality of screw node grooves 23a are formed on the inner surface of the pair of coupling pieces 2a to which the screw nodes 13 of the screw node rebars 1c and 1d are fastened. . A plurality of splines (27) and saw blade-shaped engaging portions (26) are formed on the inclined surfaces (21) of the pair of engaging pieces (2b), and the saw blades are provided on the inclined surfaces (31) of the sleeve (3a). Reinforcing bar connector, characterized in that formed in the engaging portion 37 is formed to mesh with the engaging portion 26 of the coupling piece (2b). According to claim 1, wherein the inner groove of the pair of coupling pieces are formed with a groove for fitting the bar of the reinforcing bar, the sleeve is provided with two so as to press both ends of the pair of coupling pieces outer peripheral surface of the pair of coupling pieces Reinforcing bar connector, characterized in that formed in one direction to be pressed to press both ends. 2. The reinforcing connector according to claim 1, wherein the side edges (22) of the pair of coupling pieces in the transverse direction are planar and have an inclined upper side which is a boundary line with the inclined surface (21). 4. The coupling groove (4) according to claim 3, wherein a plurality of openings (38, 38a) penetrated therein are formed in the middle portion of the longitudinal direction of the sleeve (3c), and a groove is formed on the inner surface of the pair of coupling pieces (2c). 28 is formed and made of an elastic material inside the coupling groove 28 and configured to insert a pair of coupling pieces 2c by inserting a spacer 6 having a plurality of elastic holes 61. Reinforcing bar connector characterized by the above. A plurality of openings (38, 38a) penetrated therein are formed in the longitudinal middle portion of the sleeve (3b), and a pair of couplings are formed through the openings (38) of the sleeve (3b). Reinforcing bar connector characterized in that it comprises a wedge (5) having a pointed end sandwiched between the ends of the two bars covered by the knitting (2b). 9. The male screw portion 52 is formed at the distal end portion 53 of the wedge 5, the washer 5a is fitted to the male screw portion 52, and the nut 5b is fastened so that the wedge 5 is formed. Reinforcing bar connector, characterized in that configured to prevent falling in the reverse direction. The method according to claim 2 or 3, wherein the sleeve fitted to the outer circumferential surface of the pair of engaging pieces is pulled out in the opposite direction by forming the tab hole 37a penetrated thereinto and engaging the pointed blotting bolt 4 therein. Reinforcing bar connector, characterized in that configured to prevent. Rebar connector according to claim 2 or 3 or 4, characterized in that a filler (36) is formed for filling the grout material in the longitudinal middle portion of the sleeve. 9. An impacting part (33) protruding outward is formed at an end of the sleeve having a smaller diameter, and the inclined surface of the coupling piece (10) according to claim 2 or 3 or 4 or 7 (8). Reinforcing bar connector, characterized in that the ruler (25) is displayed in 21) the interval and the order of the interval. The rebar connector according to claim 2, 3, 4, 7, or 8, wherein a rib (39) is formed on an outer circumferential surface of the sleeve. 13. The reinforcing connector according to claim 12, wherein the vicinity of the striking portion (33) of the sleeve is formed to protrude further in the longitudinal direction. The cross-sectional shape of the inclined surface 21 of the engaging piece and the inclined surface 31 of the sleeve is formed by selecting from an arc shape, a flat surface, and a polygonal shape according to claim 2 or 3 or 4 or 7 or 8. Reinforcing bar connector, characterized in that the shape of the cross section of the outer surface of the sleeve (3) is selected by forming from a circle, a polygon, an arc and a complex combined polygon. 8. The reinforcing connector according to claim 3 or 7, wherein the screw node grooves (23a) of the pair of coupling pieces are formed in the same manner as the screw nodes (13) of the reinforcing bars so as to engage without gaps therebetween.

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