KR100633313B1 - Reinforcing bar coupler - Google Patents

Abstract

The present invention relates to a reinforcing bar connector, and more specifically, when connecting a deformed reinforcing bar used to reinforce the strength of a reinforced concrete structure, the end of the two reinforcing bars to be connected or not applied to the reinforcing material of the reinforcing base material As a method of connecting while maintaining the original strength without reducing the strength, the end surfaces of the two bars to be connected are wrapped with a pair of node pieces provided with a plurality of node grooves in which the bars of the bars are fitted on the inner surface, and then A method of mechanical reinforcing bar connecting a reinforcing bar by connecting one or two sleeves formed of hollow tubular bodies on the outer circumferential surface of the piece piece to hold a pair of piece pieces together to restrain the deformed bar fitted to the inner surfaces of the piece pieces. will be.

The present invention has been made in order to solve the problems of the one-piece joint method of the mechanical reinforcing joint method, in particular, the object of the reinforcing bar of the reinforcing bar is a column or semi-circular reinforcing bar of the same shape It is possible to apply all of them regardless of the location of various sections, even if the diameter of the deformed bars is the same size. When joining the body piece to the reinforcing bar, the elastic ring or magnet is used to unite with the reinforcing bar to facilitate the connection of the bar while preventing the loss of parts. To prevent damage to the outer surface of the rebar or the corners of the striking part. Widening the range of impact, marking the ruler on the node piece so that the indentation depth is consistent with the standard so that the quality of the reinforcing bar is always uniform and can be easily visually inspected after the connection. The present invention provides a reinforcing bar connector having a structure in which a plurality of grooves are formed to reduce the contact area at the time of press-fitting the sleeve to greatly reduce the frictional resistance.

In order to achieve the above object, the present invention, a plurality of grooves are formed on the inner surface of the cross section arc-shaped so as to contact the outer circumferential surface of the deformed reinforcing bar is connected and the outer surface is inclined from one end to the other end in the axial direction Is formed in the axial direction and both sides are planar and both edges are parallel to each other parallel to the inclined section piece, the bar between the section of the reinforcing bar connected than the inclined section piece is formed to be in contact with the outer peripheral surface of the reinforcing bar A plurality of grooves are formed in the inner surface of the arc-shaped cross section so that the bar of the reinforcing bar is formed, and the outer surface is parallel in the axial direction and the two edges formed in the axial direction are flat, and the two edges are parallel to each other. Inner surface so that it can be pressed while being fitted to the node body and the outer peripheral surface of the two node body A space is secured to simultaneously cover the outer circumferential surfaces of the two sectioned bodies wrapped with reinforcing bars, and one surface of the inner surface is formed of a hollow tube having an inclined surface at the same angle as the inclined surface of the outer surface of the sectioned sectioned body, and the entire length is inclined. It is composed of a sleeve similar to the shape of a section piece, and is characterized by a structure that completely connects two rebars.

Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Mechanical reinforcing bar connections

Description

Reinforcing bar coupler {Reinforcing bar coupler}

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

Figure 2 is a perspective view of the bonded state showing an embodiment of the present invention.

Figure 3 is a longitudinal cross-sectional view of a coupled state showing an embodiment of the present invention.

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

Figure 5 is a perspective view showing a plurality of openings are formed in the sleeve in an embodiment of the present invention.

Figure 6 is a longitudinal cross-sectional view showing a coupling state when the nodes of the deformed bar in the embodiment of the present invention is formed in a semi-circular shape alternately with respect to the rib.

FIG. 7 is a plan view showing an inward direction from an inner surface of an inclined node piece in an embodiment of the present invention. FIG.

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

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

10 is a longitudinal cross-sectional view of a coupled state showing another embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10.

12 is a plan view showing an outward view from the inner surface of the inclined node piece in another embodiment of the present invention.                 

FIG. 13 is a longitudinal cross-sectional view illustrating a coupling state when the nodes of the deformed steel bars are alternately formed in a semi-circular shape with respect to the ribs in another embodiment of the present invention.

14 is an exploded perspective view showing a conventional reinforcing bar connector.

15 is a longitudinal cross-sectional view of a coupled state showing a conventional reinforcing bar connector.

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

17 is a longitudinal cross-sectional view showing a coupling state when the nodes of the deformed bars are formed in a semi-circular shape alternately with respect to the rib in the conventional reinforcing bar connector.

18 is a cross-sectional view taken along line D-D of FIG. 17.

19 is an exploded perspective view showing another conventional reinforcing bar connector.

20 is a longitudinal cross-sectional view of a coupling state showing another conventional rebar connector.

FIG. 21 is a cross-sectional view taken along the line E-E of FIG. 20.

Fig. 22 is a longitudinal cross-sectional view showing a coupling state when the nodes of the deformed bars are alternately formed in a semi-circular shape with respect to the ribs in another conventional rebar connector.

FIG. 23 is a cross-sectional view taken along the line F-F of FIG. 22.

24 is a cross-sectional view when the diameter of reinforcing bars of the same standard is larger than the standard in the conventional rebar connector and other conventional rebar connectors.

25 is a cross-sectional view when the diameter of the reinforcing bars of the same standard is smaller than the standard in the conventional rebar connector and other conventional rebar connectors.

<Explanation of symbols for main parts of the drawings>

1, 1a: Rebar (Deformed Rebar)

11: rib 12: nodes

2: parallel section piece

2a, 2b: oblique node

2c, 2d: node

20: center plane 21: groove

22: node groove 23: center groove

24: inclined surface 24a: tapered surface

25: parallel plane 26: edge plane

27: tooth surface 28: coupling ring groove

29 ruler

3, 3a: sleeve

3b, 3c: sleeve

31: inclined surface 31a: tapered surface

32: parallel surface 33: tooth surface

34: blow part 35: node

36: opening 37: large diameter

38: small diameter 39: spline                 

4: coupling ring

5: gap

The present invention relates to a reinforcing bar connector, and more specifically, when connecting a deformed reinforcing bar used to reinforce the strength of a reinforced concrete structure, the end of the two reinforcing bars to be connected or not applied to the reinforcing material of the reinforcing base material As a method of connecting while maintaining the original strength without reducing the strength, the end surfaces of the two bars to be connected are wrapped with a pair of node pieces provided with a plurality of node grooves in which the bars of the bars are fitted on the inner surface, and then A method of mechanical reinforcing bar connecting a reinforcing bar by connecting one or two sleeves formed of hollow tubular bodies on the outer circumferential surface of the piece piece to hold a pair of piece pieces together to restrain the deformed bar fitted to the inner surfaces of the piece pieces. will be.

Since rebar is manufactured to a predetermined length, it is often necessary to connect reinforcing bars when reinforcing concrete construction. Until now, various methods have been developed and used as a method for connecting reinforcing bars. There are a pressure joint, a threaded joint, and a one-piece joint. Briefly explaining the connection method of such a rebar as follows.

The most widely used reinforcing bar connection method is the overlap joint method that overlaps two axes of rebars in parallel. This is simply overlapping the ends of rebars to a certain length and temporarily fixing them by binding lines. This method is to pour concrete. This method requires the overlap length of reinforcing bars to overlap 40-50 times the rebar diameter according to the specification. It is difficult to maintain and the main spacing of overlapping joints is narrowed, making concrete filling difficult or thinning the thickness of concrete. Also, the bars are temporarily bundled only by the binding line. As the reinforcing bar's original tensile strength is There is concern about the safety is degraded as the structure and prevent the use of more than D29, the rebar.

Another method of connecting reinforcing bars is gas pressure welding, in which the rebar ends are ground by grinding with a grinder, and then the two rebars are axially faced and hydraulically pressurized while heated with an oxygen acetylene flame. As a way of doing this, the heating and pressurizing equipment cannot be used in a narrow space, and the work is restricted, and only a qualified skilled worker can work, and the use of high pressure gas presents a danger of safety and fire. As it changes the physical properties of the rebar, the strength is lowered, there is a hassle to inspect all of the connection by the ultrasonic method.

Another method of connecting reinforcing bars is the threaded jointing method, which creates a parallel or tapered male thread by cutting or rolling on the outer circumferential surface of the reinforcing bar end to be connected and connects it with a female thread coupler. As a method, such a threading method is not easy to form a screw at the end of the reinforcing bar, additional processing cost, and if the length of the reinforcing bar is long, it is difficult to align the rebar and coupler in a straight line, the fastening work It is difficult, and the connection work must be done while rotating the rebar or coupler with the tool, but many rebars are reinforcement, so the use of the tool is inconvenient due to the interference of the pre-reinforced rebars. There is a point that the diameter is smaller or the heat is applied to decrease the strength.

Another method of connecting reinforcing bars is the one-piece joint method.This method connects the deformed bar by mechanical joint method while maintaining the original state without screwing at the end. After the end, a number of nodular grooves are formed on the inner surface to engage the bars of the reinforcing bars to engage with the bars of the reinforcing bars, and the outer surface covers the butt parts of the two bars with a pair of nodular pieces tapered from one end to the other end. Next, the inner surface is tapered hollow formed from one end to the other end to be fitted to the outer peripheral surface of the pair of node piece by connecting the reinforcement by restraining while pressing the pair of piece piece in the direction of the center, An example of the method is an almost semi-cylindrical shape as shown in Figs. 14-16, with the inner side of the reinforcing bars 1, 1a. A plurality of bar grooves 22 into which the die 12 is fitted are formed, and the outer surface is connected to each other by two pairs of bar pieces 2c formed by a taper in which an arcuate outer diameter decreases from one end in the axial direction to the other end ( 1, 1a) is wrapped, and then once the tubular body 2c has a cylindrical shape approximately the same length as the tapered surface 24a of the pair of node pieces 2c. There is a method of connecting the two reinforcing bars (1, 1a) by pinning the outer circumferential surface of the pair of piece piece (2c) with a sleeve (3b) is formed of a circular hollow having a smaller diameter at the other end, 19 to 21 is almost semi-cylindrical, and the inner surface is formed with a groove groove 22 is inserted into the bar 12 of the reinforcing bars (1, 1a), the outer surface toward both ends from the center in the axial direction A pair of tapered tapered outer diameters After wrapping the butt portions of the two reinforcing bars 1 and 1a to be connected to the node piece 2d, the taper surface of both ends is cylindrical and about half shorter than the piece piece 2d and has an inner surface at both ends of the piece piece 2d. A pair of sleeves 3c, each of which has a circular hollow having a smaller diameter from one end to the other end corresponding to 24a), is fitted into the outer circumferential surface of the pair of node pieces 2d to be biaxially reinforcing bars 1 and 1a. There is a way to connect.

However, the position of the bar is different from one manufacturer to another, that is, the position of the bar protruding on both sides of two ribs that are formed symmetrically in the axial direction of the bar is different from one manufacturer to another. Most of them are divided into two types. One is that the nodes form a columnar band by matching the node formation positions on the basis of two rows of ribs, and the other is two rows of nodes. The semi-circular strips are formed on the opposite sides of the ribs to form a semi-circular band. Even in the case of the semi-circles, the semi-circular nodes formed on one side are formed on opposite sides of the ribs. Some are formed in the middle between the node and the node, but some are staggered in a non-middle position. If there is also a lot of variety of manufactured to fit the words pyeonche that can accommodate all of these things are very difficult, difficult to manage by separating the nature of the construction site.

In the conventional knitted joint method as shown in FIGS. 14 to 16 and 19 to 21, the node grooves of the node pieces are formed on the basis of one node shape of the deformed rebar, so that the positions of the bars are different. When connected, both ends of the pair of node pieces 2c and 2d do not coincide and are staggered as shown in FIGS. 17 to 18 and 22 to 23 so that the inner surface of the sleeves 3b and 3c and one node piece 2c are separated. , 2d) gap between the outer surface of the gap 5 is not fully pressed to the end of the reinforcing bar, there is a problem that the gap is generated due to the gap in the connection portion, and one end of one piece piece (2c, 2d) Is immersed and coupled to the inside of the ends of the sleeves 3b and 3c, so that the sleeves 3b and 3c do not sufficiently squeeze the entire outer surface of the engulfed segment pieces 2c and 2d, resulting in a poor joint.

Looking at this in detail. 14 to 23 is a conventional joint joint method is designed to fit the position of the bar of one of the deformed bars, there is a limit that can not be connected to accommodate all the various positions of the deformed bars. The reason for this is that the circular tapered surface 31a of the inner surface of the sleeves 3b and 3c is formed such that the angle of the arc-shaped tapered surface 24a formed on the outer surfaces of the node pieces 2c and 2d corresponds exactly to this angle. When connecting the reinforcing bars 1 and 1a having the same position as that of the same design, the reinforcing bars can be pressed while being completely in contact with each other. Because of this, field application is unreasonable. In other words, as shown in FIGS. 17 to 18 and 22 to 23, the outer surface of the pair of node pieces 2c and 2d integrated while surrounding the inner surface of the sleeves 3b and 3c and the outer circumferential surface of the rebar is The tapered surface 31a of the sleeves 3b and 3c and the tapered surface 24a of the node pieces 2c and 2d fitted therein are characterized by a tapered structure in which the cross section is circular and at the same time, the whole diameter becomes smaller in the axial direction. This exact tight fit is only possible when connecting reinforcing bars that match the design criteria, so if a pair of node pieces 2c and 2d are wrapped around the reinforcing bars and joined to each other, the inside of the sleeves 3b and 3c is One of the tapered surfaces 31a is in contact with a tapered surface 24a having a large radius of one node piece 2c and 2d, and a tapered surface 24a having a small radius of another node piece 2c and 2d is opposite to the other surface. Outer diameter of the two node pieces 2c and 2d When the step is formed so that the outer surface of one node piece 2c, 2d and the inner surface of sleeve 3b, 3c are completely in contact with each other, the outer surface of the other piece piece 2c, 2d must be aligned with the inner surface of sleeve 3b, 3c. Since the gap 5 is prevented from being fully reinforced, this jointing method is a structure that is difficult to apply industrially.

By the way, even if there is only one node position form of the deformed reinforcing bar, the conventional flattened joint method is difficult to apply in practice because there is another structural problem. In the case of the deformed reinforcing bar of, there is a deviation of about 1.5 mm in diameter, and when connecting the reinforcing bar with the different thickness from the design standard, the inner surface of the sleeve (3b, 3c) and the outer surface of the pair of node pieces (2c, 2d) meet each other. If the circles do not coincide in the same cutability, but the pair of node pieces 2c and 2d encloses the rebar having a diameter larger than the design criterion, only two vertices on the outer surface of the node pieces 2c and 2d are sleeved as shown in FIG. (3b, 3c) is in contact with the inner surface, which is not a circle in which the outer surface of the node pieces 2c, 2d and the inner surface of the sleeves 3b, 3c meet on the same cutting line as the original design. In contact with the larger circled portion of the inner surface of the grooves 3b and 3c, the sleeves 3b and 3c do not sufficiently press the entire outer surface of the node pieces 2c and 2d, so that a play occurs at the connection portion. When the node pieces 2c and 2d surround the reinforcing bars having a diameter smaller than the design standard, only four corner portions in the axial direction of the outer surface of the piece pieces 2c and 2d come into contact with the inner surfaces of the sleeves 3b and 3c as shown in FIG. This means that the contact of the outer surface of the node pieces 2c and 2d with the inner surface of the sleeves 3b and 3c is in contact with the smaller circled portion of the inner surface of the sleeves 3b and 3c rather than the circle which is consistent in the original design. Since the sleeves 3b and 3c do not sufficiently press the entire surfaces of the node pieces 2c and 2d, there is also a play in the connection part, resulting in a poor reinforcing bar connection.

As a result, even in the case of reinforcing bars having the same diameter, in fact, there are several cases where the position and diameter of the node are slightly different at the same time, so the problems of the conventional flat joint method described above also appear in the complex. This is a difficult structure to apply in.

The present invention has been made in order to solve the problems of the one-piece joint method of the mechanical reinforcing joint method, in particular, the object is that the bar of the reinforcing bar is a column or semi-circular reinforcing bar of the same shape It is possible to apply all of them regardless of the location of various sections, even if the diameter of the deformed bars is the same size. When joining the body piece to the reinforcing bar, the elastic ring or magnet is used to unite with the reinforcing bar to facilitate the connection of the bar while preventing the loss of parts. To prevent damage to the outer surface of the rebar or the corners of the striking part. Widen the range of impact, and make the indentation depth consistent with the standard by marking the ruler on the node piece so that the quality of the reinforcing bar is always uniform and can be easily inspected by the naked eye after the connection. In order to provide a reinforcing bar connector which is formed to form a plurality of grooves to reduce the friction area at the time of press-fitting the sleeve to significantly reduce the frictional resistance.

In order to achieve the above object, the present invention, a plurality of grooves are formed on the inner surface of the cross section arc-shaped so as to contact the outer circumferential surface of the deformed reinforcing bar is connected and the outer surface is inclined from one end to the other end in the axial direction Is formed in the axial direction and both sides are planar and both edges are parallel to each other parallel to the inclined section piece, the bar between the section of the reinforcing bar connected than the inclined section piece is formed to be in contact with the outer peripheral surface of the reinforcing bar A plurality of grooves are formed in the inner surface of the arc-shaped cross section so that the bar of the reinforcing bar is formed, and the outer surface is parallel in the axial direction and the two edges formed in the axial direction are flat, and the two edges are parallel to each other. Inner surface so that it can be pressed while being fitted to the node body and the outer peripheral surface of the two node body A space is secured to simultaneously cover the outer circumferential surfaces of the two sectioned bodies wrapped with reinforcing bars, and one surface of the inner surface is formed of a hollow tube having an inclined surface at the same angle as the inclined surface of the outer surface of the sectioned sectioned body, and the entire length is inclined. It is characterized by being composed of one sleeve similar to the shape section body to completely connect two rebars.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 is an embodiment of the present invention, the inner surface of the cross section formed with a plurality of cross section formed with a plurality of the grooves 22 to which the bars 12 of the reinforcing bar is wrapped around almost half of the outer peripheral surface of the reinforcing bars (1, 1a) The inclined node piece 2a and the inner surface of which are formed in one inclined surface 24 from one end to the other end and the inner surface are the same in shape as the inclined node piece 2a, and the outer surface is a parallel plane in which the whole is axially parallel. The parallel section piece (2) formed of) and the length fitted while covering the outer peripheral surfaces of the two piece pieces (2, 2a) are similar to the inclined section piece (2a), and one surface of the inner surface is axially once In the other end is composed of a hollow sleeve (3) consisting of one inclined surface 31 shows the action of connecting the reinforcing bar 1 and the reinforcing bar (1a).

The inclined nodular piece 2a is formed in such a length that the length of the inclined nodular piece 2a can fix a plurality of nodules 12 at the ends of the deformed reinforcing bars 1 and 1a. (1, 1a) is made of an arc angle that can be wrapped while being in close contact with the other rib (11) symmetrical with respect to the center of the center of the rib (11, 1a) and the node groove 22 in the same direction as the bar 12 of the reinforcing bar A plurality of joints are formed at the same interval as the bars 12 of the reinforcing bars 1 and 1a, and the width and depth thereof are formed to be precisely matched with the nodes 12 of the bars 1 and 1a to be connected to the bars 1 and 1a. Node 12 acts like a male screw and the groove 22 acts like a female thread so that the reinforcement is firmly constrained in the inclined node piece 2a and is connected to the inner axial center. Width of the two bars 12 of the reinforcing bars (1, 1a) and the depth of the node grooves (2) The center groove 23, which is an arc-shaped groove, is formed slightly deeper than the depth of 2), so that the tip portion of the reinforcing bars 1 and 1a to be connected is sufficiently accommodated when there is a bent or protrusion. The cross section is arcuate and is formed as an inclined surface 24 which is inclined from one end to the other end, and the inclined surface 24 of the thick side is formed with a sawtooth-shaped tooth surface 27, so that the tooth surface 33 of the sleeve 3 to be described later. ) To interact with each other.

The width of the inclined node piece 2a is the same in the axial direction as shown in FIG. 7, the two corner surfaces 26 at both ends of the transverse direction are formed parallel to each other in a plane, and the inclined surface 24 is entirely Has the same radius and arc distance, so that when the sliding contact with the inclined surface 31 of the sleeve 3 to be described later, which is also formed with the same radius and arc distance, axially squeezed tightly, there is always no part where the slip stops. It is formed to be in close contact.

In addition, on the thick outer surface of the inclined node piece 2a, a plurality of grooves 21 are formed to a depth to a thickness of a thinner side, and the friction area with the inclined surface 31 of the sleeve 3 sliding and contacting. It is easy to insert by reducing the weight and eliminates unnecessary carcasses exceeding the appropriate tensile stress to reduce the weight to reduce the manufacturing cost and easy handling.

The parallel section piece 2 has the same shape as the inclined section piece 2a and has a circular cross section of the outer surface having an arc shape and parallel to the axial direction without any inclination in the axial direction. The length of one side based on (23) is about half of the interval between the node grooves 22, and the node grooves 22 are formed at the end thereof by about half.

The outer surface and the edge surface 26 of the two node pieces 2, 2a are formed with a coupling ring groove 28, which is a groove extending in the transverse direction in the form of two bar pieces (2, 2a) of the rebar When the outer circumferential surface is wrapped and the coupling ring 4 made of an elastic material is inserted into the coupling ring groove 28 to bind the two peripheral pieces 2 and 2a together with the reinforcing bars, the node pieces 2 and 2a are formed. There is no risk of falling or losing, and the sleeve (3) is easy to work, and even when storing the two node pieces as a component, when the coupling ring (4) is inserted, the two node pieces can be conveniently and conveniently managed. have. However, when the two node pieces (2, 2a) are connected at both ends are not always parallel to each other and can be staggered according to the position of the reinforcing bar 12, so as to form a wide or multiple coupling ring groove 28 in one node piece The coupling ring 4 can always be installed in the transverse direction. In addition, in order to bond the two node pieces 2 and 2a to the outer circumferential surface of the reinforcing bar, grooves may be provided on the inner surfaces of the two piece pieces so as to have a magnet to play the same role as the coupling ring 4.

Reinforcing bar connections of the same manufacturer in the same workplace by displaying the ruler 29 of a certain length starting from both cross-sections on the edge surface 26 of the inclined node piece (2a) or parallel piece piece (2) When the work is made, the appropriate depth of the sleeve 3 fitted to the outer circumferential surfaces of the two piece pieces 2 and 2a at the time of the first connection work is taken as a reference while looking at the ruler 29, and the ruler is only connected to the same insertion depth in the subsequent connection work. It can be press-fitted while looking at (29), which makes the quality of rebar connection work uniform, safe reinforcing bars, and very easy to inspect after connection work.

The sleeve 3 has a length substantially equal to the inclined node piece 2a, and the cross-sectional size of the hollow inner space is such that the two piece pieces 2 and 2a surround the reinforcing bars 1 and 1a. It is formed as a space that can be inserted while fully wrapped while being integrally integrated, one surface in contact with the inclined surface 24 of the inclined node piece 2a and the inclined surface 24 of the inclined node piece 2a Since the inclined surface 31 is formed at the same angle, one end of the sleeve 3 is a large-diameter portion 37 with a large hollow, and the other end is a small-diameter portion 38 with a small hollow. In addition, the two surfaces in contact with the edge surface 26 of the two node pieces 2 and 2a are flat, and the gap is formed to be slightly larger than the width of the two node pieces 2 and 2a, and the two surfaces are axially entirely. Is parallel. In addition, the inner surface which is in contact with the parallel plane 25 of the parallel node piece 2 is formed of an arcuate surface having the same radius corresponding to the parallel plane 25 of the parallel node piece 2 and inclined entirely in the axial direction. It is formed as a parallel parallel plane 32 without.

In the inner surface of the sleeve 3, the inner surface of the large diameter portion 37, which is a surface in contact with the outer surfaces of the two node pieces 2, 2a, is formed with a sawtooth-shaped tooth surface 33, the two node pieces 2, 2a. Interaction with the tooth surface 27 of the).

The end portion of the small diameter portion 38 of the sleeve 3 is a striking portion 34 hitting the outer peripheral surface of the two section pieces (2, 2a) as a projection of a constant size in the circumferential direction is formed here By widening the area of the part 34 to facilitate the striking operation while preventing the reinforcing bar and the edge of the striking portion by the striking tool.

The central portion in the axial direction of the sleeve 3 forms an opening 36 through which the inner portion is opened, and thus the central portion irrelevant to the action of pressing and binding the two node pieces 2 and 2a which are the original roles of the sleeve 3. The manufacturing cost can be reduced by eliminating unnecessary carcasses to reduce weight, and friction with the outer surface of the two piece pieces 2 and 2a can be reduced.

The entire outer surface of the sleeve 3 is formed with a plurality of protruding nodes 35, such as the bar 12 of the reinforcing bar to increase the stress of the sleeve (3) to prevent cracking and to improve adhesion with concrete. It is also possible to form a protruding rib such as the rib 11 of the reinforcing bar.

The outer surfaces of the two node pieces 2 and 2a have a flat or polygonal cross section, as described above, and the inner surface of the sleeve 3 that is in contact with it is also formed in a flat or polygonal shape. Any number can be formed in various shapes. In addition, the outer surface of the sleeve 3 may also be formed in a circular or polygonal or a complex combination of a circle and a polygon and may be formed in various applications.

In particular, in the embodiment of the present invention Figure 6 is a longitudinal cross-sectional view showing a state in which the nodes 12 of the deformed reinforcing bars (1, 1a) are combined when they are formed in a semi-circular shape alternately with respect to two rows of ribs 11, When only the parallel section piece 2 formed about half the interval of the section groove 22 is moved axially, the inner surface of the sleeve 3 is parallel to the section piece 2 as well as the outer surface of the inclined section piece 2a. There is no gap with the outer surface of the) and it is pressed tightly, indicating that the reinforcing bar bound to the inner surface of the two piece pieces (2, 2a) becomes a perfect joint without play. In addition, even if there is a deviation in the diameter of the reinforcing bar of the same standard to be connected, if the sleeve 3, which is fitted to the outer circumferential surface of the two section pieces (2, 2a) is deeper or less embedded, the outer surface of the two section pieces (2, 2a) And the two inner surfaces of the sleeve 3 as a whole are in perfect contact with each other.

Of course, the following conditions must be fulfilled for a perfect joint in which play does not always occur regardless of positions of various rebar bars and variations in rebar diameter of the same standard.

First, as described above, one of the two node pieces 2 and 2a should use an inclined node piece 2a whose outer surface is inclined from one end to the other end, and the other is a nod groove while the outer surface is parallel in the axial direction. (22) A parallel section piece (2) formed longer than the inclined section piece (2a) by half of the spacing is to be used. If two node pieces 2 and 2a are formed in the same length to move only the parallel piece piece 2 in the axial direction, one end of the parallel piece piece 2 is concealed into the sleeve 3 and the opposite end thereof is closed. The sleeve 3 cannot be pressed against the outer circumferential surface of the reinforcing portion of the portion where the protruding parallel knurled body 2 is concealed into the sleeve 3, and thus, the joint is not completely joined.

Second, both edge surfaces 26 of the two node pieces 2 and 2a should be parallel to the whole in the axial direction, and the inclined surface 24 of the inclined node piece 2a contacting the inclined surface 31 of the sleeve 3. If the cross section is arcuate, it must be formed with the same radius and arc distance in any part of the two inclined surfaces 31 and 24. In the conventional knitted joint method proposed in the present invention, the outer surface of the two node pieces 2c and 2d and the inner surface of the sleeves 3b and 3c have a circular cross section and the taper shape becomes smaller in thickness from one end to the other end. As the connection of reinforcing bar is out of the design standard, the distance between the vertices of the outer surfaces of the two node pieces 2c and 2d is changed, and the tight fitting depth of the corresponding sleeves 3b and 3c is also changed. The two vertices of 2c, 2d) are incomplete structures where only the four corners of the axis face each other. In other words, in the conventional method, as shown in Figs. 16 and 18, in the direction of the arrow of the four parts, but in the case of the reinforcing bar deviated from the design criteria, there is no contact that satisfies the four parts at the same time. Therefore, as shown in FIG. 4, the steel bars of the thickness not deviating from the design standard should be tacked only in the direction of the arrow of the two parts, so that the outer surface of the two piece pieces 2 and 2a and the entire inner surface of the sleeve 3 are in contact with each other. . The gap between the edge face 26 of the two node pieces 2 and 2a and the two inner surfaces of the sleeve 3 facing each other is spaced a little apart to unnecessarily close the portions that are not mutually etched so that the sleeve Makes it possible to reduce the frictional resistance.                     

In other words, in the conventional knitting method, if the two node pieces 2c and 2d are integrated without being separated and the diameter thereof does not change, the whole joint is formed between the outer surface of the two piece pieces 2c and 2d and the inner surface of the sleeves 3 and 3a. The surface can be a complete structure, but in reality the two node pieces (2c, 2d) is separated and there is a difference in the position position and diameter of the bar position of the reinforcing bars (1, 1a) is actually difficult to apply the structure .

Referring to the operation of the embodiment of the present invention configured as described above in detail by the coupling sequence as follows.

First, insert the sleeve 3 so that the small diameter portion 38 first enters the one reinforcing bar 1a to be connected, and the tip of the reinforcing bar 1a is installed on the inner surface of the parallel section piece 2, but in the nodular groove 22. While inserting the bar 12 of the reinforcing bar 1a firmly, the end bar 12 of the tip of the bar 1a is installed while visually checking to be caught by the step of the center groove 23. Install in the same manner as above, while installing the inclined node piece (2a) to face the parallel node piece (2) while the bar (12) of the reinforcing bars (1, 1a) is pinched in the node groove (22) The thinner side is installed toward the large-diameter portion 37 of the sleeve 3 pre-installed in the reinforcing bar 1a so that both ends thereof are substantially aligned with the parallel knotted body 2 pre-installed. Of course, it is also possible to change the joining order of the two piece pieces 2 and 2a here.

Subsequently, the coupling ring 4 is temporarily attached to the coupling ring groove 28 of the two node pieces 2 and 2a, and then the sleeve 3 has the large diameter portion 37 as the head. 2a) to fit the outer peripheral surface of the two knot piece (2, 2a) by hitting or pressing the hitting part 34 with the blow tool or indentation mechanism while checking the ruler 29, the sleeve (3) The inclined surface 31 of the inclined surface 31 and the inclined surface 24 of the inclined node piece 2a are mutually wedged, so that the two piece pieces 2 and 2a strongly press the outer circumferential surfaces of the reinforcing bars 1 and 1a, 12 is closely engaged with the node grooves 22 of the two node pieces 2 and 2a so that the two axes of reinforcing bars 1 and 1a are completely connected without play. In addition, the tooth surface 27 of the two node pieces 2, 2a and the tooth surface 33 of the sleeve 3 engage with each other to prevent the sleeve 3 from falling out in the reverse direction.

In the action of the tensile load of the contact surface of the inclined surface 24 of the inclined node piece 2a and the inclined surface 31 of the sleeve 3 after being completely connected as described above, the large-diameter portion 37 side of the sleeve 3 The tooth surface 33 of the sleeve 3 and the tooth surface 27 of the inclined node piece 2a are engaged with each other, and the opposite side is inclined with the inclined node piece 2a tightly fitted on the inclined surface 31 of the sleeve 3. When the tensile load is applied to the two reinforcing bars 1 and 1a, the large-diameter portion 37 of the sleeve 3 is integrally formed by the engagement of the two tooth surfaces 27 and 33. Stress is distributed to the sleeve 3 while the separation of the two segment pieces 2, 2a integrated by the inclined surface 31 of the sleeve 3 is prevented. While being prevented, the stress is distributed to the sleeve 3, thereby improving the tensile strength of the connecting portion.

8 to 13 is another embodiment of the present invention, the basic configuration of which is the same as the embodiment of the present invention, but only inclined surfaces 24 are formed on both end surfaces of the outer surface of the inclined node piece 2b, respectively. The inclined surface 31 corresponding to the inclined surface 24 of the two parts is composed of a pair of sleeves 3a formed on the inner surface to completely connect the reinforcing bars 1 and 1a.                     

The inclined node piece 2b is composed of two inclined surfaces 24 whose outer surfaces are parallel to the axial center surface 20 and extend to the axial center surface 20 to be thin in both ends. The length of the sleeve 3a is about half the length of the inclined node piece 2b, and the parallel surface of the inclined surface 24 and the parallel piece piece 2 of the inclined piece piece 2b is formed. 25) is formed of a hollow tube having an inner space that is fitted while covering at the same time, one of the inner surface is the inclined surface 31 and the same inclination angle as the inclined surface 24 formed on both end surfaces of the inclined node piece (2b) It is characterized by being formed from one end to the other end. In addition, the inclined surface 24 of the inclined node piece 2b and the inclined surface 31 of the sleeve 3a corresponding thereto are all formed with the same radius and arc distance in the axial direction so that they can slide in contact with each other in the axial direction. It is formed so that it always closes completely without slipping when it gets stuck.

In particular, in the embodiment of the present invention, FIG. 13 is a semicircle in which the nodes 12 of the deformed steel bars 1 and 1a are alternately formed on the basis of two ribs 11 as shown and described in FIG. 6 of the present invention. Longitudinal cross-sectional view showing the state in which the mold is engaged, wherein only the parallel section piece 2 formed about half the spacing of the section grooves 22 in the axial direction moves the sleeve 3a to the inclined surface 24 of the inclined section piece 2b. ) As well as parallel to the parallel surface 25 of the parallel section piece (2) is completely adhered and pressed without gaps so that the reinforcing bars (1, 1a) bound to the inner surface of the two section pieces (2, 2b) is completely free of play. Indicates that it is a joint. In addition, even if there is a deviation in the diameter of the reinforcing bar of the same standard to be connected, if two pairs of sleeves (3a) that are fitted to the outer peripheral surface of the two sections (2, 2b) more deeply sandwiched or less, also two sections (2, 2b) And the entire inner surface of the sleeve 3 and the entire inner surface of the sleeve 3 become a perfect joint.

The operation and coupling sequence of the other embodiment of the present invention configured as described above are substantially the same as those of the embodiment of the present invention, except that the sleeve 3a is composed of a pair of two reinforcing bars 1 and 1a to be connected. Put the small diameter portion 38 in front of the outer circumferential surface in advance, respectively, in the same order as in the embodiment of the present invention wrapped the two reinforcing bars (1, 1a) with two knot pieces (2, 2b) and the coupling ring (4) After the temporary binding, the pair of sleeves 3a previously fitted to the reinforcing bars 1 and 1a are placed on the inclined surfaces 24 and the parallel surfaces 25 at both ends of the two piece pieces 2 and 2b. When each of them is inserted at the head and hits or presses the hitting part with the hitting tool or the press-fitting mechanism, the inclined surface 24 of the inclined node piece 2b and the inclined surface 31 of the sleeve 3a are mutually wedged so that the two nodes The knitting bodies 2 and 2b strongly press the outer circumferential surface of the reinforcing bars 1 and 1a and are thus completely It will be a solid reinforced joints.

Material of the component parts of the reinforcing bar connector of the present invention can be selected in consideration of the applicability, manufacturing cost, etc., the manufacturing method in consideration of workability depending on the material Casting, forging, pressing, hot rolling, injection, or the like.

While the technical idea of the present invention has been described with reference to two preferred embodiments, the present invention is not limited to the above embodiments, and the general knowledge in the technical field to which the present invention pertains falls within the technical scope of the present invention. Various changes can be made by those who have it.

As described above, the reinforcing bar connector of the present invention is to connect the deformed bar simply by a mechanical method with two piece pieces and one or a pair of sleeves, and the effect thereof is as follows.

First, the reinforcing bar connector of the present invention is compatible, regardless of the shape of the various bars if the bars of the deformed reinforcing bars of the column or semi-circular form the same shape of the two bars reinforcement of the same shape, regardless of the number of section Even if the diameter of the deformed reinforcing bar is the same, there is a slight deviation from company to company. Even in this case, the sleeve is secured to be completely connected between the two axes by varying the depth of fitting of the outer circumferential surface of the pair of piece pieces.

Second, the reinforcing bar connector of the present invention forms a plurality of grooves in the axial direction on the inner surface of the sleeve to reduce the frictional resistance during the press-fit of the sleeve to be easily press-fit.

Third, the reinforcing bar connector of the present invention is to be coupled to the reinforcing bar by using an elastic ring or a magnet when the two piece pieces are coupled to the reinforcing bar to facilitate the connection of the reinforcing bar to prevent the loss of parts.

Fourth, the reinforcing bar connector of the present invention by forming a projection on the hitting portion of the sleeve to widen the hitting area to facilitate the hitting operation and to prevent damage to the outer peripheral surface of the reinforcing bar and the edge of the hitting portion of the sleeve.

Fifth, the reinforcing bar connector of the present invention by displaying a ruler on the wedge to make the indentation depth consistent with the standard so that the quality of the reinforcing bar connection can be easily visually inspected after the connection while maintaining a uniform quality.

Sixth, the reinforcing bar connector of the present invention does not have a separate wedge to form an inclined surface on the inner surface of the sleeve to connect the reinforcing bars by mutually wedging with the inclined surface of the piece piece to reduce the volume of the sleeve and also reduce the number of parts have.

Claims (19)

Two node pieces having a plurality of nodular grooves 22 formed on the inner surface thereof so as to correspond to the outer circumferential surfaces of the reinforcing bars 1 and 1a and having a plurality of nodular grooves 22 into which the bars 12 of the reinforcing bars 1 and 1a are fitted. Reinforcing bar consisting of a hollow formed sleeve having a size that can be wrapped in the inner space of the two pieces to fit the two pieces in the direction of the reinforcement (1, 1a) in the inner space while being fitted to the outer peripheral surface of the two pieces In the connector, The two node pieces are formed as parallel node pieces 2 each having an outer surface having the same width in the axial direction and having the same parallel surface 25 as the whole in the axial direction. It is formed of an inclined surface 24 which is the same in the axial direction and inclined from one end to the other end, and the width of the inclined surface 24 is formed of the same inclined node piece 2a in the axial direction. One surface of the inner surface of the sleeve that is in contact with the inclined surface 24 of the inclined node piece 2a is formed with an inclined surface 31 which is inclined from one end to the other end at the same inclination angle as the inclined surface 24, and the parallel node One surface in contact with the parallel surface 25 of the knitted fabric 2 is formed with a parallel surface 32 parallel in the axial direction, the two inner surfaces in contact with the edge portion formed in the axial direction of the two node pieces (2a, 2) is in the axial direction Reinforcing bar connector, characterized in that the whole is formed of the same sleeve (3). The inclination surface of claim 1, wherein the inclined node piece 2a has an outer surface that is parallel to the central surface 20 in the axial direction and extends to the central surface 20 so that the inclined surfaces 24 are formed in both end directions. And a sleeve 3 formed in pairs so as to fit on the two inclined surfaces 24 of the inclined node piece 2b and the parallel surfaces 25 of the parallel piece piece 2 respectively. One surface of the inner surface which is in contact with the inclined surface 24 of the inclined section piece 2b is formed with an inclined surface 31 having the same angle as the inclined surface 24 and the parallel surface 25 of the parallel section piece 2. Reinforcing bar connector characterized in that the one surface in contact with the) consists of a sleeve (3a) is formed parallel to the axis parallel to the surface (32). The reinforced connector according to claim 1, wherein a plurality of recesses (21) are formed in a thick portion of the outer surface of the inclined node piece (2a). Rebar connector according to claim 1, characterized in that a plurality of openings (36) are formed in the axial central portion of the sleeve (3). The lateral edges 26 formed in the axial direction of the parallel node piece 2 and the inclined node piece 2a, 2b are formed in a plane, and the sleeve 3, Among the inner surfaces of 3a), two inner surfaces contacting the edges 26 of the parallel node pieces 2 and the sloped node pieces 2a and 2b are formed in a plane, and the spacing is between the parallel node pieces 2 and the parallel node pieces 2a and 2b. Reinforcing bar connector characterized in that it is formed slightly larger than the distance between the two edge surfaces 26 of the inclined node piece (2a, 2b) to prevent mutual contact. According to claim 1 or 2, wherein the length of the parallel section piece 2 is longer than the length of the inclined section piece (2a, 2b) half the spacing of the section grooves 22, the node groove ( Reinforcing bar connector, characterized in that 22) is further formed. The method according to claim 1 or 2, wherein a plurality of coupling ring grooves 28 are formed on the outer surface and the edge surface 26 of the parallel knotted piece 2 and the inclined knot piece 2a, 2b and are fitted therein. Reinforcing bar connector, characterized in that the coupling ring (4) is further provided. 3. The saw blade-shaped tooth surface 27 is formed in the outer surface of the said parallel knot piece 2 and the inclined knot piece 2a, 2b, The sleeve 3, 3a Reinforcing bar connector, characterized in that the saw blade-shaped tooth surface (27, 33) is formed on the inclined surface (31) and the parallel surface (32) in contact with the outer surface of the two piece pieces (2, 2a, 2b) of the inner surface. The center groove (23) according to claim 1 or 2, wherein the center groove (23) is a groove deeper than the groove (22) in the axial center of the inner surfaces of the parallel node pieces (2) and the sloped piece pieces (2a, 2b). Reinforcing bar connector, characterized in that formed. The reinforcing connector according to claim 1 or 2, wherein a magnet is provided on inner surfaces of the parallel knot piece (2) and the inclined knot piece (2a, 2b). Rebar connector according to claim 1 or 2, characterized in that a ruler (29) is formed on the outer surfaces of the parallel piece piece (2) and the inclined piece piece piece (2a, 2b). The inclined surfaces of the sleeves 3 and 3a according to claim 1 or 2, wherein a cross section of the outer surface of the parallel knot piece 2 and the inclined piece piece 2a, 2b is formed in an arc shape and corresponding thereto ( 31) and the parallel surface 32 is also formed in an arcuate cross section, and the arcuate inclined surface 24 of the inclined node piece 2a, 2b and the arcuate inclined surface 31 of the sleeve are all the same radius and arc distance. Reinforcing bar connector, characterized in that formed. 3. The inclined surface 31 according to claim 1 or 2, wherein the cross section of the outer surface of the parallel node piece 2 and the inclined piece piece 2a, 2b is formed in a plane and corresponds to the sleeve 3, 3a. Reinforcing bar connector, characterized in that the parallel surface 32) is also formed in a cross-section plane. The inclined surface 31 according to claim 1 or 2, wherein a cross section of the outer surface of the parallel knot piece 2 and the inclined knot piece 2a, 2b is formed in a polygon and corresponds to the sleeve 3, 3a. Reinforcing bar connector, characterized in that the parallel surface 32) is also formed in a polygonal cross section. Rebar connector according to claim 1 or 2, characterized in that the striking portion (34) on the side of the small diameter portion (38) of the sleeve (3, 3a) is formed with projections in the circumferential direction. Rebar connector according to claim 1 or 2, characterized in that a spline (39) consisting of a plurality of grooves in the axial direction is formed on the inner surface of the sleeve (3, 3a). The method according to claim 1 or 2, characterized in that a plurality of ribs (35) and ribs, such as the ribs (12) and ribs (11) of the reinforcing bars (1, 1a) are formed on the outer surface of the sleeve (3, 3a) Rebar connector. Rebar connector according to claim 1 or 2, characterized in that the cross section of the outer surface of the sleeve (3, 3a) is formed in a polygon. Rebar connector according to claim 1 or 2, characterized in that the cross section of the outer surface of the sleeve (3, 3a) is formed in a complex form in which circular and polygonal shapes are combined.

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