CN1723324A - Reinforcing bar coupler - Google Patents

Abstract

The object of this invention is to provide a reinforcing bar coupler coupling reinforcing bars in a mechanical coupling method, thus ensuring prompt and easy coupling operation and allowing the reinforcing bars to be firmly coupled to each other. The reinforcing bar coupler includes a cylindrical sleeve. The sleeve is opened at a surface thereof, and has a first seating groove on an inner surface thereof so that ends of reinforcing bars are seated therein, and a pair of first locking parts each having a first slant surface. A cover unit has a second seating groove on a surface thereof to cover the reinforcing bars seated in the first seating groove of the sleeve. A wedge has a pair of second locking parts each having a second slant surface, and is fitted into the sleeve to wedge the cover unit and the reinforcing bars in the sleeve.

Description

Rebar connector

technical field

The present invention relates generally to rebar connectors, and in particular to a rebar connector designed to connect rebars by a mechanical joining method, thereby ensuring that when rebars are connected to each other in reinforced concrete structures, Quick and easy connection operation, and enables the reinforcement to be firmly connected to each other.

Background technique

There are many methods for connecting steel bars currently used, such as lap joint method, air pressure welding method, screw connection method and the like. Wherein, the overlapping method carried out in this way is generally adopted, that is, the ends of the steel bars are overlapped along their certain lengths, and the overlapping ends are bundled together with steel wires. However, the lapping method has a disadvantage in that the effect of the tensile load on the lapped bars is weak. As for the air pressure welding method, the operation is such that the ends of the steel bars are butt-connected to each other, and the ends of the steel bars are welded to each other by an oxyacetylene welding process. However, the problem with the gas welding method is that the gas pressure welding process is complicated and time-consuming, and the welded part of the steel bar has poor heat resistance, requiring further follow-up inspections. The threaded connection method operates as follows: an external thread is formed on the end of each bar; and the ends of the bar are connected to each other by a connector having an internal thread on the inner surface. However, the screw connection method has a problem in that the ends of the bars must be tapped and long bars must be connected in a screw fastening method while being aligned with each other, so the screw connection method is difficult to handle. Another problem with the threaded connection method is that the threaded portion of each bar has a smaller diameter than the rest of the bar, so that the threaded sections are weak against tensile loads.

Contents of the invention

Therefore, the present invention has been made in consideration of the above-mentioned problems existing in the prior art. The object of the present invention is to provide a mechanical rebar connector comprising a sleeve, a cap and a wedge, so that the rebars can be connected to each other by merely fixing the wedge into the sleeve using simple hammering tools or hydraulic tools , thus ensuring quick and easy connection operations and enabling the reinforcement to be firmly connected to each other. In addition, the sleeve is axially open on one side thereof to form an opening so that a worker can visually observe the inside of the sleeve during the connecting operation, thereby making the connecting operation quicker and easier to complete. Furthermore, the elements of the reinforcing bar connector can be manufactured from the steel plate of the press, so that the mass production of the reinforcing bar connecting part can be carried out, and thus the cost of the reinforcing bar connecting part can be significantly reduced.

Another object of the present invention is to provide a mechanical rebar connector which allows the rebars to be connected to each other in an overlapping manner, thereby providing a quick and easy connection operation which is comparable to lapping using tying wires. Compared with the joint method, it has higher resistance to tensile or compressive loads, and the length of the overlapping area of the reinforcement is shorter, thereby increasing the distance between adjacent connected reinforcements, thus making the concrete The pouring operation is easy to complete.

Yet another object of the present invention is to provide a steel bar connector such that the elements of the steel bar connector do not have to be manufactured using supplementary processes such as tapping, thereby enabling a reduction in the manufacturing cost of the steel bar connector.

In addition, another object of the present invention is to provide a rebar connector capable of connecting rebars that may have slight differences in the size of rebars depending on the manufacturer, although the same standard is used, as long as the rebars have the same shape in the weft direction. Ribs will do, regardless of whether the weft ribs of the reinforcement are circular or semicircular.

In order to achieve the above object, the present invention provides a steel bar connector, which comprises a cylindrical sleeve, which is open on one face thereof, and has a first axially disposed in the sleeve. The fixing groove is used to accommodate the end of the steel bar, and has two first locking portions each having a first slope; and includes a cover with a second fixing axially disposed in the cover. The groove is used to cover the steel bar disposed in the first fixing groove of the sleeve; and a wedge including two second locking portions each having a second slope. In this way, the wedge is axially inserted into the sleeve, placed between the first locking portion of the sleeve and the cover, so that the wedge wedges the cover and the steel bars in the sleeve, so that the steel bars are firmly connected to each other .

Brief description of the drawings

The above-mentioned and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, wherein:

1 is an exploded perspective view of a steel bar connector according to a first embodiment of the present invention;

Fig. 2 is a side view of the reinforcing bar connector of Fig. 1, wherein two reinforcing bars are connected to each other through the reinforcing bar connector;

Fig. 3 is a sectional view along the C-C line of Fig. 2;

Fig. 4 is a sectional view made along the D-D line of Fig. 2;

Fig. 5 is a perspective view of the rebar connector of Fig. 1, wherein the rebars are connected to each other by the rebar connector;

Figure 6 is a sectional view taken along the line C-C of Figure 2, showing a modified version of the reinforcement connector according to the first embodiment of the present invention, wherein the reinforcement connector includes supplementary rib seats between the rib seats of the sleeve and Supplementary rib seats between the rib seats of the cover;

7 is an exploded perspective view of a steel bar connector according to a second embodiment of the present invention;

Figure 8 is a perspective view of a wedge included in the rebar connector of Figure 7;

Figure 9 is a side view of the rebar connector of Figure 7 shown from the leading end of the wedge, wherein two rebars are connected to each other by the rebar connector;

Fig. 10 is a sectional view along the E-E line of Fig. 9;

Figure 11 is a perspective view of the rebar connector of Figure 7, wherein the rebars are connected to each other by the rebar connector;

Figure 12 is a perspective view of the rebar connector of Figure 7, wherein the rebar is connected to each other by a plurality of rebar connectors;

Fig. 13 is a side view of a modified steel bar connector according to the second embodiment, wherein, different from the steel bar connector in Fig. 7, the locking portion of the sleeve and the locking portion of the cap-shaped member protrude outward;

14 is an exploded perspective view of a steel bar connector according to a third embodiment of the present invention;

Figure 15 is a perspective view of a wedge included in the rebar connector of Figure 14;

Fig. 16 is a perspective view of a wedge included in a modified steel bar connector according to a third embodiment, wherein the wedge has a shape different from that of Fig. 15;

Figure 17 is a side view of the rebar connector of Figure 14 shown from the hammered end of the wedge, wherein two rebars are connected to each other by the rebar connector;

Fig. 18 is a sectional view made along the G-G line of Fig. 17;

Fig. 19 is a sectional view made along the H-H line of Fig. 17;

Fig. 20 is an exploded perspective view of a reinforcing bar connector according to a fourth embodiment of the present invention;

Fig. 21 is a side view of the rebar connector of Fig. 20, wherein the rebars are connected to each other by the rebar connector;

Figure 22 is a cross-sectional view along the line A-A of Figure 21;

Figure 23 is a perspective view of the rebar connector of Figure 20, wherein the rebars are connected to each other by the rebar connector;

Fig. 24 is a cross-sectional view taken along line A-A of Fig. 21, showing a modified version of the reinforcing bar connector according to the fourth embodiment, wherein the reinforcing bar connector is used to connect deformed reinforcing bars having semicircular ribs on Together;

Fig. 25 is an exploded perspective view of a reinforcing bar connector according to a fifth embodiment of the present invention;

Fig. 26 is a side view of the rebar connector of Fig. 25, wherein two rebars are connected to each other by the rebar connector;

Figure 27 is a sectional view along the B-B line of Figure 26;

Figure 28 is a perspective view of the rebar connector of Figure 25, wherein the rebars are connected to each other by the rebar connector;

Fig. 29 is a sectional view taken along line B-B of Fig. 26, showing a first modification of the reinforcing bar connector according to the fifth embodiment, wherein the reinforcing bar connector is used to connect deformed reinforcing bars having semicircular ribs together;

Fig. 30 is a cross-sectional view taken along line B-B of Fig. 26, showing a second modification of the reinforcing bar connector according to the fifth embodiment, wherein the reinforcing bar connector is used to connect deformed reinforcing bars having semicircular ribs together;

31 is an exploded perspective view of a steel bar connector according to a sixth embodiment of the present invention;

Figure 32 is a perspective view of a wedge included in the rebar connector of Figure 31;

Fig. 33 is a perspective view of a wedge included in a modified version of the sixth embodiment, wherein the wedge has a shape different from that of Fig. 32;

Figure 34 is a side view of the rebar connector of Figure 31 shown from the hammered end of the wedge, wherein two rebars are connected to each other by the rebar connector; and

Fig. 35 is a sectional view taken along line F-F of Fig. 34 .

Best Mode for Carrying Out the Invention

It will now be introduced in conjunction with the accompanying drawings, wherein the same reference numerals used in different drawings indicate the same or similar components.

1 to 6 show a rebar connector according to a first embodiment of the present invention. According to the first embodiment, the first and second bars 1 and 1a are connected to each other by using a sleeve 2 open on one face thereof, a cover 3 and a single wedge 4, The ends of the first and second bars 1 and 1a are overlapped together.

The sleeve 2 is cylindrical and is axially open on one of its faces to form an opening 23 . A pair of fixing grooves 24 are arranged axially side by side in the sleeve 2, so that the ends of the first and second bars 1 and 1a are seated in the fixing grooves 24 side by side. Each fixing groove 24 has a semicircular cross-section, and the groove depth corresponds to about half the respective diameters of the first and second bars 1 and 1a. A plurality of rib seats 26 having a semicircular cross section are arranged at predetermined portions of the fixing groove 24 so as to receive the respective weft ribs 12 of the first and second bars 1 and 1a therein.

Two sidewalls 25 of the sleeve 2 extend upward from the outer edge of the fixing groove 24 and face each other. The distance between the two side walls 25 is slightly longer than the distance between the outer meridional ribs 11 of the first and second bars 1 and 1a placed in the fixing groove 24, so that the cover 3 can be easily placed in the in sleeve 2.

Furthermore, the sleeve 2 includes two locking portions 27 for locking a locking portion 45 of the wedge 4 which will be described below. Each locking portion 27 vertically extends from the upper edge of the adjacent side wall 25 to form a “U”-shaped cross section. In this case, the two locking portions 27 are not connected to each other, and a slope 29 is axially formed along the inner surface of each locking portion 27 to be in contact with an adjoining slope 46 of the wedge 4 described below.

On the outer surface of the sleeve 2 are provided a number of weft ribs 22 and a number of warp ribs 21 which have the same shape as the weft ribs 12 of the first and second bars 1 and 1a. It is the same as the longitudinal rib 11, thereby enhancing the adhesion between the first and second steel bars 1 and 1a and the concrete.

The cover 3 is slightly longer than the sleeve 2 by approximately half of the spacing between the respective weft ribs 12 of the first and second bars 1 and 1a. Moreover, the space between the two side walls 25 facing each other extending upwardly from the outer edge of the fixing groove 24 is slightly narrower than the cover-shaped part 3 , so that the cover-shaped part 3 can be easily placed on the two side walls of the sleeve 2 25 in the space between.

The cover 3 has a pair of fixing grooves 31 on one side thereof, which are arranged side by side to correspond to the fixing grooves 24 of the sleeve 2, so as to cover and press the first and second grooves placed in the fixing grooves 24. The outer surfaces of the two bars 1 and 1a. A parallel surface 33 is formed on a side opposite to the fixing groove 31 . In addition, a serrated surface 33a is formed at a predetermined portion of the parallel surface 33 to engage with the serrated surface 43a of the wedge 4, thereby preventing the wedge 4 from being removed from the sleeve 2 after the first and second bars 1 and 1a are connected to each other.

Also, a plurality of rib seats 32 are formed on the fixing groove 31 of the cover member 3 having the same shape as the rib seats 26 of the sleeve 2 .

The wedge 4 is slightly longer than the cover 3 in length and equal to the cover 3 in width. The wedge 4 includes a parallel face 43 in contact with the parallel face 33 of the cover 3 . Serrated surfaces 43 a are formed at predetermined portions of the parallel surfaces 43 to engage with the serrated surfaces 33 a of the cover member 3 . One or more grooves 44 are formed axially along the parallel faces 43 to reduce the surface area in contact with the parallel faces 33 of the cover 3, thereby allowing the wedge 4 to be easily inserted into the sleeve 2, being placed in this way Between the cover 3 and the locking portion 27 of the sleeve 2 . A flat middle section 47 is formed on the side opposite the parallel face 43 of the wedge 4 . Two locking portions 45 extend from opposite sides of the middle section 47 , forming a “U”-shaped section, so as to engage with the locking portions 27 of the sleeve 2 . The slope 46 is axially formed along the outer surface of each locking portion 45, and gradually narrows along the direction from the first end of each locking portion 45 to its second end, so as to be compatible with each of the sleeves 2. A slope 29 of a locking portion 27 is in close contact.

The operation of the reinforcing bar connector according to the first embodiment will be described in detail below.

First, the first and second bars 1 and 1a are arranged such that the ends of the first and second bars 1 and 1a overlap along a certain length. The worker holds and moves the sleeve 2 to receive the overlapping ends of the first and second bars 1 and 1 a in the opening 23 of the sleeve 2 . The first and second bars 1 and 1 a are placed into the fixing groove 24 of the sleeve 2 . The cover 3 is then fitted axially into the sleeve 2 from the end of the sleeve to cover the first and second bars 1 and 1a. Next, the leading end 41 of the wedge 4 is inserted into the gap between the parallel face 33 of the cover 3 and the locking portion 27 of the sleeve 2 . Next, the hammered end 42 of the wedge 4 is hammered with a tool such as a hammer or a hydraulic jack. When the wedge 4 is inserted into the sleeve 2, the slope 29 of the locking portion 27 of the sleeve 2 is in close contact with the slope 46 of the locking portion 45 of the wedge 4, so that the wedge 4 presses the cover 3, and the cover 3 strongly The outer surfaces of the first and second reinforcing bars 1 and 1a are compressed so that the first and second reinforcing bars 1 and 1a are firmly connected to each other.

Rebar connectors that connect rebars to each other by lap splices are mainly used to connect rebars with smaller diameters to each other. However, such rebar connectors may be used to connect rebars with larger diameters to each other during the installation of rebars. The rebar connectors of the present invention are comparable to conventional rebar connectors in which the rebar connectors are connected to each other by overlapping the ends of the rebar connectors along a certain length. However, unlike conventional steel bar connectors using bundled steel wires, the steel bar connectors according to the present invention connect the bars to each other through mechanical steel bar connectors including sleeves 2 , caps 3 and wedges 4 . Therefore, the reinforcing bar connector of the present invention enables the connecting operation to be easily performed, thereby reducing man-hours. Moreover, the steel bar connector of the present invention can reduce the overlapping length of the connected steel bars, thereby reducing the manufacturing cost. Since the distance between adjacent connected steel bars is increased when the connected steel bars are installed, concrete can be poured densely, deeply and evenly into the mold made of concrete formwork, thereby increasing the strength of reinforced concrete. the strength of the structure. Moreover, compared with conventional steel bar connectors that use binding steel wires to connect steel bars, the steel bar connector of the present invention can make the connected parts of steel bars have higher resistance to tensile or compressive loads.

Fig. 6 shows a modified version of the rebar connector according to the first embodiment. Supplementary rib seats 26 are arranged between the rib seats 26 of the fixing grooves 24 of the sleeve 2, and supplementary rib seats 32 are arranged between the rib seats 32 of the fixing groove 31 of the cover 3, thereby making the weft ribs 12 Can be placed into the rib seats 26 and 32 regardless of whether the weft rib 12 is circular or semicircular in shape. Specifically, when the first and second bars 1 and 1a are connected to each other by overlapping the ends of the bars 1 and 1a, the weft ribs 12 of the first and second bars 1 and 1a must be inserted into the sleeve 2 at the same time The rib seat 26 and the rib seat 32 of the cover 3. In this case, the weft ribs 12 of the first and second bars 1 and 1a may have the same shape, such as circular or semicircular, however, one of the bars 1 and 1a may have a circular weft. ribs 12, while another bar 1 or 1a may have weft ribs 12 in a semicircular shape. However, supplementary rib seats 26 , 32 are arranged between the rib seats 26 , 32 so that the weft ribs 12 of the bars 1 and 1 a can be inserted into the rib seats 26 and 32 at the same time.

7 to 13 show a rebar connector according to a second embodiment of the present invention. The rebar connector of the second embodiment is identical to that of the first embodiment, except that the first and second rebars 1 and 1a are connected to each other without the cover 3 but only by inserting a wedge 4a. Insert the sleeve 2a out of the way.

The sleeve 2a has the same structure as that of the first embodiment. In addition, a supplementary rib seat 26 can be configured between the rib seats 26 of the fixing groove 24 of the sleeve 2a, for receiving the first and second reinforcing bars 1 and 1a whose latitudinal ribs 12 are in various shapes, as shown in FIG. 6 Show.

The wedge 4a has the same width and length as the wedge 4 of the first embodiment. However, according to the second embodiment, since the first and second bars 1 and 1a are wedged in the sleeve 2a only by the wedge 4a and not by the cover 3, the wedge 4a is made thicker than the wedge 4, This allows the outer surfaces of the first and second bars 1 and 1a to be sufficiently compacted.

The leading end 41 of the wedge 4a is chamfered so that when the wedge 4a is hammered into the sleeve 2a in which the first and second bars 1 and 1a are placed, the wedge 4a can slide smoothly into the sleeve 2a without Interrupted by the outer surfaces or weft ribs 12 of the first and second bars 1 and 1a. The parallel surfaces 43 in contact with the first and second bars 1 and 1a are all formed with serrated faces 43a to directly compress the outer surfaces of the first and second bars 1 and 1a. And, as shown in Figure 8, the hammering end 42 of the middle section 47 of the wedge 4a is configured with a protruding portion with a right-angled triangular section, so that when the wedge 4a is hammered into the sleeve 2a, the wedge 4a will not Hindered by the outer surfaces of the first and second bars 1 and 1a.

Figure 13 shows a modified version of the rebar connector according to the second embodiment. The steel bar connector of Fig. 13 is the same as that of the second embodiment, except that the cross sections of the locking portion 27 of the sleeve 2a and the locking portion 45 of the wedge 4a are different. In the steel bar connector in FIG. 13 , the locking portion 27 of the sleeve 2 a extends outward from the upper edge of the side wall 25 so as to be perpendicular to the side wall 25 . A slope 29 is formed along the lower surface of each locking portion 27 , sloping upward in a direction from the outer edge to the inner edge of the lower surface of each locking portion 27 . The locking portion 45 of the wedge 4a extends outwardly from opposite side faces of the intermediate section 47 and bends downwards before bending towards the serrated face 43a to form a "U" shaped cross-section. A slope 46 is formed along the upper surface of the inwardly extending portion of each locking portion 45 so as to correspond to the slope 29 of the sleeve 2a. The general structure and operation of the rebar connector of Figure 13 remains the same as the rebar connector of the second embodiment.

The connection method performed using the reinforcing bar connector according to the second embodiment is described below.

First, the first and second steel bars 1 and 1a are placed side by side in the fixing groove 24 of the sleeve 2a, so that the ends of the first and second steel bars 1 and 1a overlap along a certain length. Then, the wedge 4a is loosely inserted into the sleeve 2a, placed between the first and second bars 1 and 1a received by the sleeve 2a and the locking portion 27, and then the wedge 4a is hammered with a hammering tool. At this time, the slope 29 of the sleeve 2a is in close contact with the slope 46 of the wedge 4a, so that the serrated surface 43a of the wedge 4a strongly presses the outer surfaces of the first and second bars 1 and 1a, so that the first and second Rebars 1 and 1a are firmly connected to each other.

The rebar connector of the second embodiment can be used in place of the binding wire for connecting rebars to each other by overlapping the ends of the rebars. The reinforcing bar connecting member of the second embodiment has excellent workability and can connect reinforcing bars to each other more firmly than the reinforcing bar connecting operation using the binding steel wire. Also, as shown in Figure 12, one or more rebar connectors may be installed in the overlapping areas of the rebar. In this way, the number of reinforcing bar connectors can be adjusted arbitrarily.

14 to 19 show a rebar connector according to a third embodiment of the present invention. The steel bar connector of the third embodiment has the same structure and elements as the first embodiment, except that the sleeve 2b and the wedge 4b are manufactured by plastically deforming a steel plate having a predetermined thickness using a press to manufacture each sleeve 2b and wedge 4b so that they have a constant thickness outside. Accordingly, the sleeve 2b has a constant thickness as a whole, and a semicircular protruding rib is formed on the outer surface of the fixing groove 24 of the sleeve 2b, and the position of the semicircular protruding rib corresponds to the position of the fixing groove 24. The rib seat 26 thus acts as a weft rib 24 for the sleeve 2, 2a. Also, the wedge 4b is manufactured by plastically deforming a steel plate using a press, so that the wedge 4b has a constant thickness as a whole. In order to prevent the wedge 4b from moving away from the position between the cover 3b and the locking portion 27 of the sleeve 2b, a serrated surface 43a is formed on a predetermined portion of the parallel surface 43 . Or, the inner surface of each locking portion 27 is formed to have a width slightly smaller than the width of each locking portion 45 of the wedge 4b, so that the locking of the sleeve 2b can be firmly locked at the portion of the locking portion 45 adjacent to the leading end 41. part 27, thereby preventing the wedge 4b from being removed from the sleeve 2b. As shown in FIG. 15, the hammer end 42 of the middle section 47 of the wedge 4b protrudes from the direction relative to the parallel surface 43, forming a "V"-shaped protrusion. The "V"-shaped protrusion increases the hammering surface of the wedge 4b, so that the wedge 4b is easily hammered in without being blocked by the first and second steel bars 1 and 1a. Also, a steel plate having a constant thickness is cut into a trapezoidal shape, and then its both edges are bent upward by a press to form the locking portion 45 of the wedge 4b. The slope 46 is formed along each locking portion 45 in such a manner that the height of the slope 46 gradually decreases from the first end to the second end of each locking portion 45 . As shown in FIG. 16, a groove 44 having a "V"-shaped cross-section is formed axially along the middle section 47 of the wedge 4b so as to reduce the surface area in contact with the cover member 3b.

The method of connecting steel bars using the steel bar connector according to the third embodiment is still the same as that of the first embodiment.

In the reinforcing bar connector of the third embodiment, the sleeve 2b is open on one side thereof. Therefore, mass production of the steel bar connector can be realized by manufacturing the sleeve 2b by using a press machined steel plate, and thus the cost of the steel bar connector can be considerably reduced.

20 to 24 show a rebar connector according to a fourth embodiment of the present invention. The reinforcing bar connector of the fourth embodiment connects the first and second reinforcing bars 1 and 1a in a row without overlapping the ends of the reinforcing bars 1 and 1a. The rebar connector includes a sleeve 2c with one side open, a cover 3c and a pair of wedges 4c. The general structure and operation of the bar connector of the fourth embodiment is still the same as that of the first embodiment, except that the first and second bars 1 and 1a are connected in a row. The structure of the steel bar connector of the fourth embodiment is described as follows, that is, a single fixing groove 24 is configured along the inner surface of the sleeve 2c, a single fixing groove 31 is configured along the surface of the cover 3c, and wedges 4c is formed by a pair of wedges 4c.

The slope 29 of the locking portion 27 of the sleeve 2c is formed to have a gradually increasing diameter along the direction from the center portion of the sleeve 2c to both ends thereof, so that the pair of wedges 4c gradually increases from the sleeve 2c. Both ends of the diameter are inserted into the sleeve 2c. Since the first and second steel bars 1 and 1a are connected in a row, the first and second steel bars 1 and 1a are axially installed in the sleeve 2c so that the leading ends of the steel bars 1 and 1a protrude into the fixed ends of the sleeve 2c. The groove 24 and the center portion of the fixing groove 31 of the cover 3c. Recesses 28 and 34 are provided at central portions of the fixing grooves 24 and 31, respectively. The semicircular recesses 28 and 34 each have a width comparable to the width between the three weft ribs 12 and are slightly deeper in depth than the adjacent rib seats 26,32. Therefore, when the leading ends of the first and second bars 1 and 1a may bend during cutting with a press, or a protrusion larger than the diameter of the first and second bars may appear, the recesses 28 and 34 enable bending. The leading ends or projections of the bars are completely received therein so that the weft ribs 12 of the first and second bars 1 and 1a are completely placed between the sleeve 2c and the cover 3c.

Pairs of serrated surfaces 33a are formed at both ends of the parallel surfaces 33 of the cover member 3c. The wedge 4c consists of a pair of wedges 4c, and is approximately half the length of the sleeve 2c in length. A serrated face 43a is formed at one end of the parallel face 43 of each wedge 4c.

Figure 24 shows a modified version of the rebar connector according to the fourth embodiment. In cases where it is not necessary to use a cover different from the cover 3c, the rebar connector of Figure 24 can be used to connect deformed bars 1 and 1a, which are designed such that their weft ribs 12 are offset from each other with respect to adjacent meridional ribs 11. The bar connector of Fig. 24 can be used to connect deformed bars 1 and 1a to each other regardless of whether the weft rib 12 of each deformed bar is circular or semicircular. In order to connect the deformed bars 1 and 1a to each other by using a single bar connector, the cover 3c is made slightly longer in length than the sleeve 2c by about half the distance between the rib seats 32. In addition, outer rib seats 32 are provided at both ends of the cover 31 so that weft ribs 12 having various shapes can be placed in the rib seats 32 . Furthermore, the parallel face 33 of the cover 3c is formed flat instead of inclined, and the parallel face 43 of each wedge 4c is also formed flat. Therefore, when the cover 3c is installed in the sleeve 2c, the position of the cover 3c can be adjusted so that the cover 3c protrudes axially from the end of the sleeve 2c, and the extension length is about the weft rib 12 half of the interval between. In this case, a pair of wedges 4c are respectively inserted into the sleeve 2c from both ends of the sleeve 2c, interposed between the cover 3c and the locking portion 27 of the sleeve 2c. At this time, a pair of wedges 4c are inserted by the same distance from both ends of the sleeve 2c. Like this, two wedges 4c equally wedge the whole part of the parallel face 33 of cover-shaped part 3c, make cover-shaped part 3c fully compress the outer surface of the first and second deformed steel bars 1 and 1a placed in sleeve 2c . Thereby, the first and second deformed bars 1 and 1a are firmly connected to each other. In addition, the deformed bars 1 and 1a having the same thickness as the same standard but different shapes of the weft ribs 12 can be connected to each other by a bar connector having a single kind of cover 3c, so it is not necessary to deform according to the first and second The shape of the weft ribs 12 of the bars 1 and 1a is equipped with different covers, which is convenient for the worker, also makes the elements of the bar connection easy to handle and makes the connecting operation easy to perform.

Although the bars are of the same standard, there may be slight differences in the size of the bars depending on the manufacturer. However, the reinforcing bar connector of the fourth embodiment enables the insertion distance of each wedge 4c to be adjusted according to the thickness of each reinforcing bar so that the reinforcing bars are firmly connected to each other, thereby overcoming the conventional reinforcing bar connection using a cover-shaped member. problems with the file.

The operation of the rebar connector according to the fourth embodiment will be described in detail as follows.

The first steel bar 1 is placed in the sleeve 2c, and at the same time, the worker confirms whether the leading end of the first steel bar 1 extends into the recess 28 of the sleeve 2c. At this time, the position of the first steel bar 1 is adjusted so that the latitudinal rib 12 of the first steel bar 1 is placed in the rib seat 26 of the fixing groove 24 . Then, the second bar 1a is inserted into the sleeve 2c in the same manner as the first bar 1 . Next, the cover 3c is inserted axially from one end of the sleeve 2c into the space between the two side walls 25 of the sleeve 2c, so that the weft ribs 12 of the first and second bars 1 and 1a are placed in the rib seats 32, at the same time make one end of the cover 3c protrude slightly from the sleeve 2c or be equivalent to the end of the sleeve 2c. Subsequently, the leading ends 41 of a pair of wedges 4c are aligned with the two ends of the sleeve 2c, and then the wedges 4c are inserted into the sleeve 2c from the two ends of the sleeve 2c by using a hammer tool or a hydraulic tool, so that the locking of the wedges 4c Part 45 firmly locks the locking part 27 of the sleeve 2c. At this time, the slope 29 of the locking portion 27 of the sleeve 2c is in close contact with the slope 46 of the locking portion 45 of the wedge 4c, thereby strongly compressing the cover 3c toward the outer surfaces of the first and second bars 1 and 1a. , so that the first and second bars 1 and 1a are firmly connected to each other. In addition, the serrated surfaces 33a of the cover member 3c are respectively engaged with the serrated surfaces 43a of the pair of wedges 4c, thereby preventing the wedges 4c from being removed from the sleeve 2c.

In the steel bar connector according to the fourth embodiment, a pair of wedges 4c are inserted into the sleeve 2c from both ends of the sleeve 2c, and the length of each wedge 4c corresponds to about half of the length of the sleeve 2c. Assuming that the slope of the fourth embodiment has the same slope angle as the slope of the fifth embodiment to be described below, compared with the length of the wedge 4d almost equal to the length of the cover 3d in the fifth embodiment, each The thickness of the hammering end 42 of a locking portion 45 can be thinner, and the insertion depth of each wedge 4c into the sleeve 2c can be shorter. Therefore, the rebar connector of the fourth embodiment facilitates the hammering operation. Also, the rebar connector of the fourth embodiment is suitable for connecting thick rebars to each other.

25 to 30 show a reinforcing bar connector according to a fifth embodiment of the present invention. The general structure of the reinforcing bar connector of the fifth embodiment is still the same as that of the fourth embodiment. The reinforcing bar connecting member of the fifth embodiment connects the first and second reinforcing bars 1 and 1a to each other by using a sleeve 2d with an open side, a cover 3d and a single wedge 4d. In the reinforcing bar connector of the fifth embodiment, the slope 29 of each locking portion 27 of the sleeve 2d has a fixed bevel from the first end to the second end of each locking portion 27, which is different from the fourth embodiment. The inclined surface 29 formed in this example has a different diameter gradually increasing from the center portion of the sleeve 2c to both ends of the sleeve. However, except that the serrated surface 33a is formed on one end of the parallel surface 33, the general structure of the cover member 3d is still the same as that of the cover member 3c of the fourth embodiment. According to the fifth embodiment, the wedge 4d is constituted by a single wedge, which has a length almost equal to that of the cover 3d, and the slope 46 of each locking portion 45 extends from the first end of the locking portion 45 to its second end. The ends have a fixed bevel so as to correspond to the bevel 29 of the sleeve 2d. Thus, when the wedge 4d is inserted into the sleeve 2d, the cover 3d presses against the outer surfaces of the first and second bars 1 and 1a.

The bar connector with only a single wedge 4d is used in the case when both the first and the second bar 1 and 1a have a relatively small diameter. Thus, in the case where both the first and second bars 1 and 1a have relatively small diameters, it is not necessary to use a long sleeve 2d, unlike the sleeve 2c of the fourth embodiment. Therefore, using only a single wedge 4d, the first and second bars 1 and 1a having a smaller diameter can be connected to each other without inserting a pair of wedges into the sleeve from opposite ends thereof. The smaller the respective diameters of the first and second bars 1 and 1a are, the shorter the length of the sleeve 2d is. The rebar connector of the fifth embodiment requires only a single wedge, thereby reducing the number of components.

Figures 29 and 30 show a modification of the reinforcing bar connector according to the fifth embodiment. The bar connector can be used to connect deformed bars 1 and 1a by using a single cover 3d, which is designed such that its weft ribs 12 are offset from each other with respect to the adjacent warp ribs 11 . The bar connector can be used to connect the deformed bars 1 and 1a, regardless of whether the weft ribs 12 of the deformed bars 1 and 1a are circular or semicircular. The reinforcing bar connecting member connects the deformed reinforcing bars 1 and 1a to each other by using a single reinforcing bar connecting member 3d. The working principle of the reinforcing bar connecting piece is still the same as that of the reinforcing bar connecting piece in FIG. 24 .

The operation and connecting sequence of the rebar connector according to the fifth embodiment is the same as that of the fourth embodiment, except that the rebar connector of the fifth embodiment has a single wedge 4d. Thus, according to the fifth embodiment, using a hammering tool or a hydraulic tool, the wedge 4d is inserted into the sleeve 2d from the end having a larger diameter of the locking portion 27, thereby making the first and second deformed bars 1 and 1a firm to each other ground connected.

31 to 35 show a reinforcing bar connector according to a sixth embodiment of the present invention. The general structure and elements of the sixth embodiment are the same as those of the fifth embodiment, except that the sleeve 2e and the wedge 4e each having a constant thickness are produced by plastically deforming a steel plate having a predetermined thickness using a press. . Thus, the wedge 2e has a constant thickness as a whole. A plurality of rib seats 26 are formed along the wedge 2e by die molding, and a plurality of semicircular protrusions are formed on the outer surface of the sleeve 2e at positions corresponding to the rib seats 26 as weft ribs 22 . Also, the wedge 4e is formed by plastically deforming a steel plate using a press so that the thickness of the middle section 47 is equal to the thickness of each locking portion 45 . In order to prevent the wedge 4e from dislodging undesirably from the insertion position between the cover 3e and the locking portion 27 of the sleeve 2e, a serrated surface 43a is formed on the parallel surface 43, or, opposite to the leading end 41 of the wedge 4e. Each locking portion 27 of the sleeve 2e in contact is formed with a width slightly smaller than that of each locking portion 45 of the wedge 4e, so that the locking portion 27 of the sleeve 2e securely locks the locking portion 45 of the wedge 4e. As shown in Figure 32, the hammering end 42 of the middle section 47 of the wedge 4e protrudes toward the direction opposite to the parallel surface 43 of the wedge 4e, thereby forming a "V"-shaped raised portion, such raised portion increases The hammering area of the wedge 4e is enlarged, so that the wedge 4e is easily hammered in. Also, a steel plate having a constant thickness is cut into a trapezoidal shape and then bent upward on both edges using a press to form the locking portion 45 of the wedge 4e. The slope 46 is formed along each locking portion 45 in such a manner that the height of the slope 46 gradually decreases from the first end to the second end of each locking portion 45 .

As shown in FIG. 33, a "V"-shaped groove 44 is axially formed along the middle section 47 of the wedge 4e for reducing the surface area in contact with the cover 3e.

The method of connecting steel bars using the steel bar connector according to the sixth embodiment is the same as that of the fifth embodiment.

In addition, a scale 48 is provided on the outer surface of the middle section 47 of the wedges 4, 4a, 4b, 4c, 4d, 4e, extending from the hammering end 42 to a predetermined position. Thus, the scale 48 enables the wedges 4, 4a, 4b, 4c, 4d, 4e to be inserted into the sleeves 2, 2a, 2b, 2c, 2d when steel bars of the same standard produced by the same manufacturing company are connected to each other. , the intended location in 2e. The subsequent connecting operation is carried out by inserting the wedges 4, 4a, 4b, 4c, 4d, 4e into the sleeves 2, 2a, 2b, 2c, 2d, 2e at predetermined positions using the scale 48. In this way, the scale 48 makes it possible to obtain uniformly connected bars and also to ensure that subsequent inspections are easily performed.

Considering the suitability, production cost and other aspects, the components of the steel bar connector according to the present invention can be made from cast steel, cast iron, steel plate, high-strength plastic, special alloy and the like. Also, in consideration of materials and workability, processing of elements can be performed by various methods including casting, forging, pressing, and injection molding.

Industrial Applicability

As described above, the present invention provides a rebar connector comprising a sleeve open on one side thereof, a cover and a wedge, thereby enabling rebars to be connected to each other quickly and easily, and allowing the connected parts of the rebars to have a high Strength of.

According to the steel bar connector of the present invention, the steel bars are connected to each other by inserting the wedge into the sleeve which is open on one side thereof, so that the connecting operation can be performed quickly and the connected parts of the steel bars have high strength, This reduces the cost and shortens the working hours.

According to the rebar connector of the present invention, some elements can be made of steel plates by using a press, thereby enabling mass production of the rebar connector and thus reducing the cost of the rebar connector.

According to the invention, a rebar connector enables rebars to be connected to each other when their ends overlap along a length. In this case, compared with the case where the steel bars are connected to each other using binding wires, the connected parts of the steel bars have higher strength, and the overlapping length of the steel bars is shorter, so that the distance between the adjacent connected steel bars increased, thereby enabling the pouring operation of concrete into the space between the connected steel bars to be easily performed, thereby increasing the strength of the reinforced concrete structure.

The rebar connector of the present invention is capable of connecting rebars that are of the same standard, but may differ slightly in the size of the rebar. Also, the rebar connector is capable of connecting rebars to each other as long as the rebars have weft ribs of the same shape, regardless of whether the weft ribs of the rebar are circular or semicircular.

The rebar connector of the invention allows the elements of the rebar connector to be manufactured in a simple manner, thereby reducing production costs.

According to the present invention, the rebar connector includes a scale at a predetermined portion of the wedge so that the wedge is inserted into a predetermined position of the sleeve, thereby enabling uniformly connected rebars and ensuring easy follow-up inspection.

While the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, modifications, Additives and substitutions are also possible.

Claims (22)

1. A rebar connector for connecting first and second rebars to each other, the first and second rebars each comprising a plurality of weft and warp ribs, said rebar connector comprising: A cylindrical sleeve, axially open on one side, comprising: A pair of first fixing grooves, the fixing grooves are arranged axially side by side in the sleeve, so that the ends of the first and second steel bars are installed side by side in the first fixing grooves, the first fixing grooves each have a semicircle Shaped section, and the groove depth is about half of the respective diameters of the first and second steel bars, and many first rib seats are arranged in respective predetermined parts of the first fixing groove, so that the respective latitudinal ribs of the first and second steel bars housed in it; a cover-shaped member for covering the first and second steel bars fitted into the first fixing groove of the sleeve, the cover-shaped member having a pair of second fixing grooves on its predetermined surface, the second fixing grooves being side by side disposed to correspond to the first fixing groove, a plurality of second rib seats are disposed at respective predetermined portions of the second fixing groove so that respective weft ribs of the first and second reinforcing bars are seated therein; and A wedge is inserted axially into the sleeve from one end of the sleeve for wedging the cap and the first and second bars in the sleeve. 2. A rebar connector according to claim 1, wherein The sleeve includes first locking portions disposed along two opposite edges of the open surface of the sleeve, and first slopes formed along respective inner surfaces of the first locking portions, and The wedge includes second locking portions disposed along opposite sides of a predetermined surface of the wedge, and second slopes formed along respective outer surfaces of the second locking portions, so that the first locking portion of the sleeve is aligned with the The second locking portion of the wedge is engaged while the first slope of the sleeve is in contact with the second slope of the wedge. 3. A rebar connector according to claim 1, wherein the cover is longer than the sleeve by half of the space between the respective weft ribs of the first and second bars, the cover includes a first parallel surface formed on a side opposite to the second fixing groove, and a first sawtooth face formed on a predetermined portion of the first parallel face, and The wedge includes a second parallel surface at a position in contact with the first parallel surface of the cover, and a second sawtooth surface formed on a predetermined portion of the second parallel surface, and along the second The serrated surface forms at least one groove in the axial direction. 4. The steel bar connector according to claim 1, wherein the first fixing groove of the sleeve further includes first supplementary rib seats arranged between the first rib seats, and the second fixing groove of the cover further includes a second fixing groove arranged between the first rib seats. A second supplementary rib seat between the second rib seats. 5. The rebar connector of claim 1, wherein said sleeve comprises: A plurality of weft and warp ribs provided on the outer surface of the sleeve has the same shape as the weft and warp ribs of the first and second bars. 6. A rebar connector according to claim 1, wherein the first and second rebars are connected to each other only by fitting wedges into the sleeves. 7. A rebar connector according to claim 6, wherein said wedge comprises: a bevelled leading end; a serrated face disposed on a parallel face of said wedge; and A raised portion provided on the hammering end of the middle section parallel to the wedge. 8. The steel bar connector according to claim 6, wherein the first locking portions of the sleeve extend outwardly from the upper edge of the side wall of the sleeve so as to be perpendicular to the side wall, and along respective lower surfaces of the first locking portions the first slope formed, and The second locking portion of the wedge extends outwardly from opposite sides of the mid-section of the wedge, and is bent downwardly before bending towards the serrated face to form a “U” shaped cross-section, and along the respective upper sides of the second locking portion. The second slope formed by the surface. 9. The reinforcing bar connector according to claim 1, wherein each of the sleeve and the wedge is made to have a constant thickness by plastically deforming a steel plate having a predetermined thickness using a press. 10. The steel bar connector according to claim 9, wherein the respective inner surfaces of the first locking portions of the sleeves have a width slightly smaller than the respective widths of the second locking portions of the wedges such that the second locking portions of the wedges The locking portion securely locks the first locking portion of the sleeve. 11. A rebar connector according to claim 9, wherein the hammer end of the mid-section of the wedge is raised against the parallel face of the wedge to form a raised portion. 12. A rebar connector according to claim 9, wherein the midsection of said wedge includes a slot formed axially along the entire length of the midsection. 13. The steel bar connector according to claim 1, wherein said sleeve includes a first fixing groove formed on the inner surface of the sleeve, and said cover-shaped member includes a first fixing groove corresponding to the first fixing groove of the sleeve. A second fixing slot, and the wedge is composed of a pair of wedges. 14. The steel bar connector according to claim 13, wherein the first slope of the first locking portion of the sleeve is formed to have a diameter gradually increasing in a direction from a central portion of the sleeve to both ends of the sleeve. so that a pair of wedges can be inserted into the sleeve from its diameter-increasing ends, and in the central portion of the first fixing groove of the sleeve and in the second fixing groove of the cover The central part of the first and second depressions are respectively provided with depths of the first and second depressions to be deeper than the first and second rib seats. 15. A rebar connector according to claim 13, wherein said cap is longer than said sleeve by about half of the space between the second rib seats, and said cap is contained on the opposite side of the cap. The outer rib seat at the end, the first parallel face of the cover member is flat, and the predetermined portion of the second parallel face of each wedge which is in contact with the first parallel face of the cover member is also flat. 16. A rebar connector according to claim 13, wherein the first bevels of the first locking portions of the sleeve each have a constant bevel angle from a respective first end of the first locking portion to a second end thereof, and Said wedge is constituted by a wedge having a length almost equal to the length of said cover member, the second slopes of the second locking parts of the wedge each having a constant length extending from the respective first end of the second locking part to its respective first end. The bevel of the second end. 17. The reinforcing bar connector according to claim 16, wherein each of the sleeve and the wedge is made to have a constant thickness by plastically deforming a steel plate of a predetermined thickness using a press. 18. A rebar connector according to claim 17, wherein the respective inner surfaces of the first locking portions of the sleeves have a width smaller than the respective widths of the second locking portions of the wedges such that the first locking portions of the wedges The second locking part firmly locks the first locking part of the sleeve. 19. A rebar connector according to claim 17, wherein the hammer end of the intermediate section of the wedge is raised towards a direction opposite the second parallel face of the wedge, thereby forming a raised portion. 20. A rebar connector according to claim 17, wherein the midsection of said wedge includes a slot formed axially along the entire length of the midsection. 21. A reinforcing bar connector according to claim 13 or 16, wherein said wedge comprises a slot axially disposed along a parallel face of the wedge. 22. A rebar connector according to any one of claims 1, 6, 9, 13, 16, and 17, wherein the wedge further comprises a scale on the outer surface of the midsection of the wedge.

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