KR20060037097A - Reinforcing bar coupler - Google Patents

Abstract

The present invention inserts two end bars of the reinforcing bar into the sleeve formed with a plurality of node grooves into which the bar of the bar is inserted into the inner surface and inserts a semi-cylindrical node piece into the inside of the sleeve and then wedged into the sleeve By tightly pressing the web and connecting the reinforcing bars, it exerts a strong tightening force with a small force, making the reinforcing joints stronger than the base material of the reinforcing bars. It relates to a mechanical reinforcing bar joint method using a wedge.

In the present invention, in the reinforcing connector, it is possible to produce a single mold in the manufacturing process by forming the node piece and the piece piece of the sleeve in the same shape, thereby greatly reducing the mold development and manufacturing cost, the inside of the sleeve In order to secure the space where rebar and node body enters, the wedge is press-fitted to form a semi-cylindrical body fixing part that supports the node body to press the reinforcing bar. The purpose of this is to reduce the material cost and to reduce the cross-sectional area of the sleeve so that it can be applied even when the reinforcement spacing of the rebar is narrow, thereby improving the mortar inflow between the reinforcing bars and improving the industrial applicability.

According to the present invention, two semi-cylindrical piece fixing parts having inclined surfaces inclined in the axial direction are formed on both sides of the axial direction of the semi-cylindrical piece having a plurality of grooves into which the bars of the bar are fitted. A sleeve in which the internal inclined surface is integrally coupled to face the inner surface of the node piece portion, a node piece body having the same shape as the node piece portion, and a wedge shape in which a partial semicylindrical shape is inclined from one end to the other end to decrease the angle of the front end. A wedge which is inserted into the sleeve and is interposed between the inner surface of the sleeve and the inner surface of the node piece, and is integrally constrained by the wedge and the two reinforcement end surfaces constrained between the inner surface of the sleeve and the inner surface of the node piece. It is characterized by consisting of a pair of fixing wedges pressed in between and pushed in the direction of pulling the two rebars.

Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Reinforcing bar connections, Wedge 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.

It is a perspective view which shows the node piece part of the node piece and sleeve part of an Example of this invention in detail.

3 is a perspective view showing in detail the wedge of the embodiment of the present invention.

Figure 4 is a perspective view showing in detail the knitting fastening which is a part of the sleeve in an embodiment of the present invention.

5 is a perspective view showing in detail the sleeve of the embodiment of the present invention.

6 is a perspective view of a coupled state showing an embodiment of the present invention.

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

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

Figure 9 is a longitudinal cross-sectional view of a bonded state showing another structure of the node piece in the embodiment of the present invention.

10 is a perspective view showing a state in which the knitting fixing part integrally formed in the embodiment of the present invention.

FIG. 11 is a perspective view illustrating a state in which the knit fixing part of FIG. 10 is coupled to the node piece portion to form a sleeve in an embodiment of the present invention.                 

FIG. 12 is a perspective view illustrating a state in which the knitting fixing part and the knot piece are formed in two diameter shapes so as to connect two reinforcing bars having different diameters in the embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

1, 1a: Rebar (Deformed Rebar)

11: rib 12: nodes

2: sleeve

21: node

21a: Rebar insertion surface 21b: Node groove

21c: center groove 21d: outer surface

21e: tooth side 21f: outer longitudinal groove

21g: Outer horizontal rib

22: fixed government

22a: slope 22b: arrow

23: welding part 24: connection part

3: node

31: Rebar insertion surface 32: Node groove

33: center groove 34: outer surface

35: tooth side 36: outer longitudinal groove

37: outer horizontal rib

4: wedge                 

41: tip portion 42: hitting portion

43: slope 44: outer longitudinal groove

45: ruler 46: inside

46a: arrow 47: internal longitudinal groove

48: internal transverse rib 49: tooth surface

5: fixed wedge

51: parallel plane 52: inclined plane

52a: tooth side

The present invention relates to a reinforcing bar connector, and more particularly, a node groove in which a bar of reinforcing bars is inserted into an inner surface of an end of two deformed bars to be connected when connecting reinforcing bars used to reinforce the strength of a reinforced concrete structure. Inserted into the sleeve formed in large numbers, and inserted into the sleeve of the semi-cylindrical section of the sleeve, and then wedge into the sleeve to strongly press the node to connect the reinforcement by exerting a strong tightening force with a small force to the reinforcement joint It is stronger than reinforcing steel base material, and simply connects reinforcing bars by simply hitting a wedge tool, which is very easy to work and greatly reduces the construction cost by using a wedge mechanical rebar joint method.                         

Reinforcing bars are produced at a fixed unit length in the manufacturing plant for the convenience of transportation and work. Therefore, in the case of construction work, it is often necessary to connect reinforcing bars. Various methods have been developed and used to connect reinforcing bars. Some typical methods include overlapping joints, gas welding joints, threaded joints, and one-piece joints.

Lap joint is a method of connecting the ends of the reinforcing bars and tie them together with a binding line, which is wasteful as the overlapping part of the reinforcing bars, and because the reinforcing bars are bundled with the binding line, they are vulnerable to tensile load.

Gas pressure welding is a method of processing the ends of two rebars in a plane, butting them in a straight line, and then welding them by applying mechanical pressure while heating them with an oxygen acetylene flame, which is inconvenient to use equipment and reduces the strength due to thermal deformation of the rebar. However, it is inconvenient to inspect the connection part by ultrasonic method.

Threaded joints are a method of connecting two rebars by processing a male thread at the end of the rebar and screwing it with a coupler with female threads at both ends.It is necessary to process a screw at the end of the reinforcing bar. The screw fastening operation is very difficult, and the work of tightening by rotating the rebar or coupler with a spanner is difficult due to the interference of the reinforcing bars, and the thread of the rebar is thinner than the reinforcing bar diameter, thereby reducing the strength.

Knitting joint is a method of connecting using the locking action of the node while maintaining the end of the reinforcing bar in its original state. For example, a male thread and a female thread are respectively provided at the ends of a large diameter of a pair of cylindrical tubes tapered inside. A pair of formed sleeves are fitted to each of the two rebars, each having a semi-cylindrical shape, and a plurality of transverse grooves in which the bars of the bars are fitted are formed on the inner surface, and the outer surface is formed of a taper corresponding to the taper of the inner surface of the sleeve. After the two ends of the reinforcing rods are wrapped, the pair of sleeves are fastened by screwing the pair of sleeves to connect the reinforcing bars to connect the reinforcing bars. The core of the technology is to ensure that the rebar does not slip away from the knitting body, so it fits in the groove of the groove. The positions of the nodes displaced around the ribs of the manifold are different so that a pair of sleeves must completely coincide both ends of the pair in order to completely tighten the pair of knits. There is a problem that needs to be customized, which is difficult to apply in practice. Thus, in order to fit the bars of the two pieces side by side while fitting the bars of the bars into the grooves of the pieces, the width of the grooves of the pieces may be widened to connect the reinforcing bars having various types of nodes. Although a pair of sleeves can press and tighten a pair of knits at the same time, only one section centered on two ribs of the reinforcing bar tends to be caught in the jaw of the groove on the inner surface of the knit. When applied, the eccentric occurs and the joint is inadequate, and there is no slip between the bars and grooves of the reinforcing bars, which can cause slippage of the rebars or cracks in the concrete. Rotational tightening using the same tool results in interference from already reinforced bars. There is also a difficult problem.

According to the reinforcing bar connector, which has been filed as a utility model by the applicant of the present invention and has been registered as a utility model by the applicant of the present invention, the reinforcing bar connector of the reinforcing bar on the inner surface is A semi-cylindrical section piece having a plurality of grooves into which the node is inserted, and a piece fixing part is extended at each end of the section piece, so that the overall shape is cylindrical at both ends in the axial direction and the center is almost semi-cylindrical. The first node of the body, and a semi-cylindrical, a plurality of grooves are formed in the inner surface of the reinforcing bar, and the second node formed in the same length as the first node, and the partial semi-cylindrical at the other end A wedge shape in which the angle of the front end becomes smaller by being inclined to be inserted between the inclined surface of the first node piece and the outer surface of the second piece piece; It is composed of one or more wedges that act to press and restrain the reinforcing bars fitted to the inner surface of the first and second node pieces by pressing the knitting bodies. It can be applied without any force, and the bar of the rebar is precisely meshed with the nodular grooves of the two piece pieces to provide the screw-like rigidity to prevent slippage at the joint.

The object of the present invention is in addition to the advantages of the one-piece rebar connector filed by the applicant of the present invention and registered under Utility Model No. 331388 (designated name: reinforcing bar connector). It is possible to reduce the mold development and manufacturing cost by forming the same shape by making it into one mold in the manufacturing process, and the wedge is press-fitted while securing the space where the reinforcing bar and the section piece are inserted into the sleeve. By forming a piece-shaped fixing part that has a supporting function that can measure the reinforcing bar of the bar piece in a semi-cylindrical shape and joining it to the outer surface of the piece piece by welding or the like, it saves material cost and reduces the cross-sectional area of the sleeve to reinforce the bar. It is possible to apply even if the gap is narrow, so that the inflow of mortar between reinforcing bars is good. Possibility is to significantly increase.

In order to achieve the above object, the present invention, the semi-cylindrical section of the semi-cylindrical node piece is formed with a plurality of grooves in which the bar of the bar is fitted on the inner surface of the half with an inclined surface inclined in the axial direction A sleeve in which two cylindrical body fixing parts are integrally coupled with an inner inclined surface to face the inner surface of the node piece portion, a node piece body having the same shape as the node piece portion, and partially semi-cylindrical inclined from one end to the other end. Wedge shape that the angle of the tip becomes smaller and is inserted into the sleeve to press the two bars between the inner surface of the sleeve and the inner surface of the knot piece to integrally restrain the wedge, and the inner surface of the sleeve and the knot piece Consists of a pair of fixed wedges that press in between two rebar end faces constrained between them and push the two rebars in both ends of the sleeve It is characterized by being.

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

1 to 12 are a perspective view and a cross-sectional view showing an embodiment of the present invention as described in the brief description of the drawings.                     

According to the drawings, the reinforcing connector of the present invention is composed of a semi-cylindrical central portion in the axial direction and both ends are formed of a sleeve (2) and a semi-cylindrical section piece (3) and the wedge (4) and the fixed wedge (5) It acts to connect the reinforcing bar (1) and the reinforcing bar (1a).

The sleeve 2 has a width that can be wrapped from one rib 11 of the deformed rebars 1 and 1a to a boundary line of the opposite rib 11 formed at a symmetrical position and a node at the end of the deformed rebars 1 and 1a. The semi-cylindrical section piece 21 and the semi-cylindrical piece fixing section 22 formed at both ends in the axial direction of the section piece 21 are formed to have a length sufficient to fix a large number of 12). The two ends are formed by joining the outer surface 21d of the node piece portion 21 by welding or the like in the form facing the inner surface of the node piece portion 21, so that both ends of the entire shape are cylindrical in the axial direction. And the center is almost semi-cylindrical.

The rebar insertion surface, which is the inner surface of the node piece 21, is a space in which the rebars 1 and 1a are inserted and fixed about halfway in the transverse direction, and the rebars 1 and 1a to which the semi-circular groove-shaped grooves 21b are connected. It is formed at the same interval as the node 12 of the) and its width and depth are formed so as to fit exactly with the node 12 of the reinforcing bars (1, 1a) to be connected so that the nodes 12 of the reinforcing bars (1, 1a) The same role and the node groove (21b) acts like a female screw so that the reinforcing bars (1, 1a) is screwed to the node piece portion 21, and in the axial center than the depth of the node groove (21b) A slightly deep and long semi-circular groove-shaped center groove (21c) is formed so that the front end of the reinforcing bars (1, 1a) to be connected to be accommodated when there is a bend or a protrusion.

The outer surface 21d of the knuckle body portion 21 is formed in an arcuate cross section while being entirely parallel in the axial direction, and an outer longitudinal groove 21f formed of grooves having a shape that is shallower toward the center in the axial direction at both ends. There are a plurality of outer horizontal ribs (21g) formed at the same height as the outer surface across the transverse direction at regular intervals in the outer longitudinal axis groove (21f) to reduce the friction area with the wedge (4) to be described later and the material is reduced A large number is formed and serves to offset the decrease in strength due to the formation of the outer longitudinal groove 21f. The outer transverse ribs 21g and the outer longitudinal grooves 21f of the node piece 21 enlarge the locking jaw and the cross-sectional area of the bars 12 and the ribs 11 of the reinforcing bars 1 and 1a to form a concrete. It acts to increase the bonding force. In addition, by forming the sawtooth-shaped tooth surface 21e only at the central portion in the transverse direction at both ends of the outer surface 21d of the node body portion 21, the node formed in the same shape which will be described later rather than forming the tooth surface at both ends. When used as the knitted body (3) while reducing the frictional resistance during indentation of the wedge (4) to interact with the tooth surface 49 of the wedge (4) to be described later, when used as the knuckle body portion 21, the outer horizontal axis The rib 21g and the outer longitudinal groove 21f act to increase the bonding force with the concrete.

The two piece fixing portion 22 is in the form of a sleeve with one side open, and about half of the rebars 1 and 1a and the node piece 3 are positioned and the wedge 4 can be inserted therein. The bottom of the inner surface having an inner space of and sliding in contact with the inclined surface 43 of the wedge 4 is an inclined surface 22a which is inclined in the axial direction, and the inclined surface 43 of the wedge 4 whose cross section is arc-shaped as described later. It consists of the same angle of inclination and cross section. When the two piece fixing parts 22 are integrally coupled to both ends of the piece piece portion 21, the wedges 4 to be described later are formed on the bottom surface of the inner side by forming an inclined surface 22a having one inclination from one end to the other end. When penetrating through the knitting fixing portion 22, the inclined surface 43 of the wedge 4 is supported on the inclined surface 22a of the knitting fixing portion 22 so as to press the whole outer surface 34 of the node piece 3 in close contact with each other. do.

On the outer surface 21d of the two piece fixing parts 22, an arrow 22b is formed to guide the insertion direction to the worker to insert the wedge 4 first into the piece fixing piece 22 having a large radius in at least one place. do.

When the two piece fixing parts 22 are joined to the outer surface of the piece piece part 21 by welding or the like, the end portions of both pieces in the direction of both ends of the piece piece fixing piece 22 coupled to the piece piece piece 21 are not the piece pieces. The ends in the central direction of the two piece fixing parts 22 are positioned so that the ends are positioned in the central direction slightly past both ends of the central groove 33 of the piece piece 3 so that they are coupled inward. The length of the piece fixing part 22 is formed, respectively.

The combined structure of the node piece portion 21 and the two piece fixing portion 22 as described above is shorter than the piece piece portion 21, the length of both ends of the piece fixing portion 22 is the same as the piece piece portion 21. Both ends of the node piece 3 are inserted into the sleeve fixing part 22 even though the node piece 3 having the shape is inserted into the sleeve 2 and installed while adjusting in the longitudinal direction according to the shape of the bar pieces 1 and 1a. It is easy to install by not immersing and makes stable structure.

By doing so, even if the section piece 3 described later in the same length and shape as the piece piece section 21 of the sleeve 2, the coupling is not inconvenient or the safety is not reduced, so two parts are manufactured by one type of mold. It is possible to reduce the mold development and manufacturing costs, and also to select the manufacturing method of manufacturing the node piece portion 21 and the piece fixing portion 22 separately by combining the method such as welding and the piece piece portion ( 21) can be manufactured by the forging method, so if the material is selected according to the standard and manufactured, the quality can be uniformed than the casting method, and the strength stronger than the reinforcing base material can be secured at all times. Manufacturing steel plates can reduce production costs.

In addition, the opening of the middle portion of the sleeve 2 can be visually confirmed the limit of the reinforcement retracted, it is possible to hold and adjust the knot piece (3) and also through the middle portion of the fixing wedge (5) By inserting), the initial slip of the rebar is eliminated in advance to prevent the slip of the reinforcing bar that can occur when the tensile force is applied to the reinforcing bar after concrete placement.

When the piece fixing part 22 is formed into a sleeve body having one surface open and joined to the outer surface of the piece piece body 21, it is formed into a cylindrical shape and covers both ends of the piece piece piece 21 so that the sleeve 2 is joined. Since the cross-sectional area of the can be reduced, there is an advantage of securing more spacing between the bars.

As shown in FIGS. 10 to 11, the two piece fixing parts 22 are integrally formed through the connecting part 24 to facilitate the coupling with the piece piece 21 and the welding method, and the rebar having a small diameter ( When applied to the case of connecting 1, 1a), even if the steel sheet is produced by a piercing (Piercing) mold method by the press working process, the amount of scrap is small and there is no problem.

The node piece 3 has the same shape as the node piece part 21 of the sleeve 2 and is installed while covering the reinforcing bars 1 and 1a inside the sleeve 2 and when the wedge 4 is press-fitted, Direction, the joints of the two reinforcing bars 1 and 1a together with the node piece of the sleeve 2 are restrained and integrally connected, and the tooth surface 35 of the outer surface 34 is the tooth surface 49 of the wedge 4. Interaction with and prevent the wedge (4) from falling in the reverse direction.

In particular, as shown in FIG. 9, the ribs 12 of the reinforcing bars 1 and 1a, which introduce the one side grooves 32 with respect to the center groove 33 of the node piece 3, form two ribs 11. The positions of the node grooves 32 are formed at an intermediate position between the existing node grooves 32 and the node grooves 32 so that the nodes 12 of the reinforcing bars centered with each other can be fitted into the node grooves 32. In addition, although not shown, forming the nodular groove 32 at the intermediate position of the existing nodular groove 32 has the same function even when formed in the nodal piece portion 21 of the sleeve (2).

Although not shown, one of the node piece portions 21 and the piece pieces 3 of the sleeve 2 may be selected to replace the node grooves 32, thereby forming a plurality of sawtooth-shaped semicircular protrusions, and forming a diamond-shaped square pyramid. A plurality of teeth or square pyramids may be formed on both the node piece portion 21 of the sleeve 2 and the rebar insertion surfaces 21a and 31 of the piece piece 3 by forming a plurality of them. It can be applied when the bar of reinforcing bars (1, 1a) is not the standard product of the deformed bar or it is difficult to use the interlocking action by the locking bar such as the deformed bar or pipe, and this method is also connected by the strong tightening force of the wedge The part is a solid structure.

The wedge (4) is a partial semi-cylindrical shape is formed of a tip portion 41 starting from the striking portion 42 of the thick side toward the end and the thickness becomes thinner and the width is almost the same as the section piece (3) and the length of the section piece ( It is formed slightly longer than 2).                     

The inner surface 46 of the wedge 4 is a part slidingly contacting with the outer surface 34 of the node piece 3, the whole surface is parallel in the axial direction like the node piece 3, the cross section is the outer surface of the piece piece 3 It is formed in the same arc shape as (34), the inner longitudinal axis groove (47) consisting of a long groove that is deeper toward the striking portion 42 in the axial direction and shallower toward the tip portion 41 is formed to the outer surface of the node piece (3) When the sliding contact with the (34) to reduce the friction area to reduce the resistance during indentation, the inner longitudinal groove (47) has a rib-shaped inner transverse ribs transverse in the transverse direction lower than the height of the inner surface at regular intervals ( 48 is formed to act to prevent the decrease in strength due to the formation of the inner longitudinal groove (47). By forming the inner transverse ribs 48 lower than the outer surface, the frictional area with the outer surface 34 of the node piece 3 is reduced to prevent the original action of the inner longitudinal groove 47 from being reduced.

The inner surface of the wedge 4 is provided with the sawtooth-shaped tooth surface 49 only in the center of the transverse direction toward the striking portion 42, so that the friction area with the knuckle body 3 is formed rather than forming the tooth surface throughout the cross section. It is reduced to facilitate the indentation, but to interact with the tooth surface 35 of the node piece (3). In addition, an arrow 46a is formed on the inner surface of the wedge 4 to indicate the pressing direction of the wedge 4.

The outer surface of the wedge 4 has a thickness in the same direction as the inner inclined surface 22a of the knitted fixing portion 22 of the sleeve 2, as the cross section is arcuate, and goes from the striking portion 42 to the tip portion 41 in the axial direction. Is thinner and has an inclined surface 43 having the same inclination angle as that of the inclined surface 22a of the sleeve 2 and an outer longitudinal groove 44, which is a plurality of grooves having a full length in the axial direction, so that the inclined surface 22a of the sleeve 2 is formed. It reduces the frictional resistance when pressing the wedge by reducing the contact area by sliding.

The outer surface of the wedge 4 is formed on the outer surface of the wedge (4) to form a ruler (45) marked with a line scale and a serial number by a predetermined length so that when the reinforcing bars of the same manufacturer of the same manufacturer at the same workshop By making reference to the depth of the wedge 4 that is properly press-fitted into the knitting fixing portion 22 of the sleeve 2 during the connecting operation, by looking at the ruler 45, it is possible to press-fit to the same insertion depth in subsequent connecting operations. The quality of the connection is uniform, which makes it a safe reinforcing bar and makes it very easy to inspect after connecting.

The fixed wedge (5) is a wedge shape with a pointed tip, one surface is a parallel surface 51 consisting of a parallel surface as a whole and the opposite surface of the parallel surface 51 is formed with an inclined surface 52 made of an inclination, the inclined surface 52 The sawtooth-shaped tooth surface 52a is formed in this. A pair of fixed wedges 5 formed as described above are fitted on the inner surface of the node piece portion 21 of the sleeve 2 and the inner surface of the piece piece 3 and faced to each other, which are tightened by the wedges 4. (1, 1a) In the space between the end faces are inserted in the transverse direction, the pair is inserted in the opposite direction to each other and the tooth surface 52a is meshed with each other and meshed and the parallel surface 51 to the end faces of the reinforcing bars (1, 1a) Insert it into contact. As such, the two fixing wedges 5 are inserted at both sides, and when the fixing wedge 5 is pushed on only one side, the ends of the two reinforcing bars 1 and 1a are pushed in opposite directions, and the connection portions of the reinforcing bars 1 and 1a are pushed. This can be slightly bent and by forming the tooth surface 52a in the fixing wedge 5 to prevent the two fixing wedges 5 from falling out in the opposite directions, respectively. However, the fixing wedge 5 may be inserted only when the distance between the two rebar end surface is narrow so that a pair of fixing wedge (5) can not be pressed.

Reinforcing bar connector of the present invention when connecting the reinforcing bars (1, 1a) with a wedge (4) of the sleeve (2) and the node piece (3) is a bar 12 of the reinforcing bars (1, 1a) of the node of the sleeve (2) Concave and convex coupling with the grooves 22 and 32 of the knitted fabric portion 21 and the knuckle 3 make a strong joint. In addition, the fine wedge is removed by using the fixing wedge 5 to act as a lock nut. do. By the way, such a fine clearance is also the reinforcing bar to connect the gap between the section piece 21 of the sleeve 2 and the width of the node grooves 21b and 32 of the node piece 3 and the node grooves 21b and 32. It can be easily solved by manufacturing a mold according to (1, 1a).

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

The tip of one of the reinforcing bars 1 to be connected is inserted from one end of the sleeve 2 to the inner end of the reinforcing bar 1 so as to reach the center groove 21c of the sleeve 2 at this time. (12) is made to fit in the node groove (21b) of the node piece portion (21).

Then, the other reinforcing bar (1a) is installed in the same manner as above, and the piece piece (3) is inserted into the inside of the sleeve (2), the node 12 at the end of the two bars (1, 1a) in the node groove 32 Install all of them.

The wedge 4 is then fixed in the space between the outer surface 34 of the section piece 3 and the inclined surface 22a of the sleeve 2 provided while covering the reinforcing bars 1 and 1a in the sleeve 2. 21) the front end portion 41 is pulled in a larger radius, and the inclined surface 43 of the wedge 4 is pushed into the sleeve 2 by hitting the striking portion 42 with a hammer or a hydraulic press tool or the like. Supported by the inclined surface (22a) of the knitting fixing portion 21 of the wedge (4) deeply embedded into the sleeve 2, the two bars (1, 1a) by tightening the knot piece (3) strongly It is strongly connected, and the tooth surface 35 of the node piece 3 and the tooth surface 49 of the wedge 4 engage with each other to prevent the wedge 4 from falling in the reverse direction even if there is flow in the connecting portion.

Then, if necessary, if one or two of the fixing wedge 5 is pressed in between the end faces of the two bars 1 and 1a according to the size of the gap, the two bars 1 and 1a are pushed out in the pulling direction. If there are minute clearances between the node 12 of the reinforcing bars 1 and 1a and the node body portion 21 of the sleeve 2 and the node grooves 21b and 32 of the node body 3, the two bars ( 1, 1a) is also connected, and then a slight pull in the axial direction is prevented from the tensile force applied.

The reinforcing bar connector of the present invention having a structure and function as described above has a node body (12), although the shape of the bar 12 of the deformed steel bars (1, 1a) currently used is very different from each other around the two ribs (11). 3) Adjusting in the axial direction to install the inside of the sleeve (2) by pressing only the wedge (4) because the knot piece (3) is tightened in the direction of the reinforcing bars (1, 1a), both can be applied and deformed bars ( Even if the diameters of 1 and 1a are the same, there is a slight variation in each manufacturer. If the actual diameter of the reinforcing bars 1 and 1a is thicker than the design, the depth of the wedge 4 pressed into the sleeve 2 is less than the design. When press-fitted and thinner than design, the wedge 4 strongly presses the node piece 3 so that the reinforcing bars can be securely connected.                     

As shown in FIG. 12, the rebar insertion surfaces 21a and 31 and the node grooves on both sides of the node body 21 of the sleeve 2 and the center grooves 21c and 33 of the inner surface of the node body 3 are referred to. The radius of (21b, 32) is formed in two different diameters so that even if the two rebars are of the same size, even if there is a deviation in the actual diameter, they can be connected. Make sure that you can connect two rebars (1 and 1a) with different diameters. By the way, the radius of the node piece portion 21 is coupled to a smaller radius fixing piece 22 and the radius of the node piece portion 21 is a larger radius of the piece fixing piece 22 to combine the sleeve 2 By forming a) it is easy to hit the wedge (4) from the top to the bottom when connecting the reinforcing bar diameter as the top.

Although not shown, two piece fixing parts 22 coupled to the piece piece portion 21 of the sleeve 2 are provided in the same shape, so that ends having a large radius are positioned at both ends of the piece piece piece 21, such as welding. By a method of forming a pair of wedges 4 having the same shape as the wedge 4 and longer than the length of the knitting fixing portion 22, thereby forming two reinforcing bars 1, 1a in the node piece portion of the sleeve 2 ( 21, respectively, and the two pieces (1, 1a) to cover the two bars (1, 1a) and then into the piece fixing part 22 and then wedges (4) indented at both ends, respectively, the piece ) Can press the bars and connect them strongly.

As described above, the reinforcing bar connector according to the present invention is a reinforcing bar connection method using a wedge that exerts a strong tightening force with a small force, and simply connects the reinforcing bar by simply sticking a wedge tool to connect the reinforcing bar. The construction cost can be greatly reduced, and the reinforcing joints are stronger than the reinforcing base materials.

Reinforcing bar connector of the present invention can reduce the development and manufacturing cost of the mold by forming the section piece and the section piece of the sleeve in the same shape, the stable quality because it is possible to work by forging using a metal material stronger than the reinforcing base material To ensure the safety of the concrete structure, and to manufacture the sleeve, the two piece fixing parts are not formed in a cylindrical shape but are formed in the shape of a sleeve having one side open and joined to the outer surface of the piece piece by welding or the like. By manufacturing to reduce the material cost and to reduce the cross-sectional area to ensure more spacing spacing.

Reinforcing bar connector of the present invention by forming the outer transverse rib and the inner transverse rib in the transverse direction in the outer longitudinal groove of the node piece and the inner longitudinal groove of the wedge to prevent the groove portion is deteriorated even when strongly pressed by the wedge In addition, the tooth surface is formed only in the center portion in the transverse direction in the node piece and the wedge to reduce the indentation resistance of the wedge.

The reinforcing bar connector of the present invention presses the fixing wedge into the space between the sleeve and the node piece and the end faces of the two bars integrally joined by the wedge, so that the node of the rebar inserted into the node piece portion of the sleeve and the node groove of the piece piece is spaced apart. If present, it is removed to provide stability of the joint.

Reinforcing bar connector of the present invention is formed in the middle position of the groove or the projection of the node groove formed in the bidirectional groove formed in both directions with respect to the node portion of the sleeve or the center groove of the node piece or formed in the form of protrusions It can be used when the node forming positions are different.

The reinforcing bar connector of the present invention forms a node piece or a piece piece of a two-piece sleeve to connect two reinforcing bars of different diameters.

Claims (18)

Node section 21 having a plurality of node grooves 21b in which a cross section into which the inner surface is inserted in the transverse direction of reinforcing bars 1 and 1a is arcuate and the nodes 12 of bars 1 and 1a are fitted. A sleeve 2 having one side open at both ends of the axial direction, and an inner bottom thereof formed by combining two piece fixing portions 22 formed in an axially inclined surface 22a in a transverse direction; The node piece 3 formed in the same manner as the piece piece 21 of the sleeve 2, the inclined surface 22a of the piece fixing part 22 of the sleeve 2 and the outer surface 34 of the piece piece 3. The two inserted into the space between the rebar insertion surface 21a of the node piece portion 21 of the sleeve 2 and the rebar insertion surface 31 of the piece piece 3 are inserted into the space between the two pieces. Reinforcing bar connector, characterized in that consisting of the wedge (4) for restraining the reinforcing bars (1, 1a). The inclined surface (22a) of claim 1, wherein the inner bottoms of the two piece fixing parts (22) coupled to the node piece portions (21) of the sleeve (2) are formed with one inclination from one end to the other end, and the wedge ( 4) is a reinforcing connector characterized in that the thickness is thinner toward one end is formed to the length of the node piece (3). 2. The sleeve body 2 according to claim 1, wherein the two body fixing parts 22 of which the inner bottom faces are the same inclined surface 22a are joined to both portions of the node piece portion 21 to form the sleeve 2, and the wedges 4 Reinforcing bar connector, characterized in that provided in pairs slightly longer than the length of the body portion (22). The semi-circular groove according to claim 2 or 3, wherein the node piece portion 21 of the sleeve 2 and the axial center inner surface of the piece piece 3 are slightly deeper and longer than the grooves 21b and 32. Reinforcing bar connector characterized in that the center groove (21c, 33) is formed. According to claim 2 or claim 3, The two piece piece fixing portion formed in the same piece of the section piece 21 and the piece piece 3 of the sleeve 2 and made of iron plate on the outer surface of the piece piece 21 ( 22) Reinforcing bar connector, characterized in that for welding. 4. The node piece portion 21 of the sleeve 2 and the outer surfaces 21d, 34 of the piece piece 3 are parallel in the axial direction and are formed in an arcuate cross section and both ends thereof. A plurality of outer longitudinal axis grooves 21f, 36 formed of axial grooves in the outer horizontal axis ribs 21g, 36g are formed at the same height as the outer surface across the transverse direction at regular intervals in the outer longitudinal axis grooves 21f, 36g, 37 is formed in a number, the inner surface 46 of the wedge 4 is parallel to the whole in the axial direction, the cross section is formed in the same arc shape as the outer surface 34 of the section piece 3 and made of axial grooves Longitudinal shaft recesses 47 are formed, and the inner longitudinal shaft recesses 47 have a plurality of rib-shaped inner transverse ribs 48 transversely transversely lower than the height of the inner surface at predetermined intervals, and the outer surface of the wedge 4 is Similar to the inclined surface 22a of the sleeve 2, the cross section is arcuate. As the thickness becomes thinner toward one end in the axial direction, a plurality of external longitudinal grooves 44, which are inclined surfaces 43 made of the same inclination angle as the inclined surface 22a of the sleeve 2 and are axial grooves, are formed, Reinforcing bar connector characterized in that the bottom surface of the inside of the fixing piece 21 is formed in the same inclination angle as the inclined surface 43 of the wedge (4) and the same arc shape as the cross section of the wedge (4). The saw blade-shaped tooth surface 21e is formed in the both ends of the outer surface of the node piece part 21 of the sleeve 2, and the striking part 42 is provided in the inner surface 46 of the wedge 4. Reinforcing bar connector characterized in that it forms a sawtooth-shaped tooth surface (49), by forming an arrow 46a on the wedge (4) to indicate the pressing direction of the wedge (4). 8. The wedge 4 according to claim 7, wherein arrows 22b and 46a are formed on the outer surface and the wedge 4 of the knitted fixing part 22 of the sleeve 2 to indicate the press-in direction of the wedge 4, Reinforcing bar connector, characterized in that to form a ruler (45) on the outer surface. The two end portions of the two piece fixing portions 22 coupled to the node piece portion 21 of the sleeve 2 are positioned inwardly from both ends of the piece piece piece 21, and the two pieces of piece height are fixed. Reinforcing bar connector characterized in that the end portion of the central direction of the government unit 22 is formed so that the end portion is positioned in the central direction slightly past both ends of the center groove (21c) of the node piece portion 21 to engage. 4. The reinforced connector according to claim 2 or 3, wherein the two fastening parts 22 are integrally formed through the connection part 24 to be combined with the node piece part 21 to form the sleeve 2. . According to claim 2 or 3, wherein the position of the side grooves 32 relative to the center groove 33 of the node piece (3) to the intermediate position between the existing grooves 32 and the node grooves 32 Reinforcing bar connector, characterized in that formed on. 4. The nodular groove 21b and the nodal groove according to claim 2 or 3, wherein the position of the nodal grooves 21b with respect to the center groove 21c of the nodular body portion 21 of the sleeve 2 is determined. (Reinforcing bar connector characterized in that formed in the intermediate position of 21b. The method according to claim 2 or 3, wherein at least one of the node piece portion 21 and the node piece 3 of the sleeve 2 is selected to form at least one of a sawtooth-shaped semicircular protrusion and a diamond-shaped square pyramid shape. Reinforcing bar connector, characterized in that. The method according to claim 2 or 3, wherein both the node portion 21 of the sleeve 2 and the rebar insertion surfaces 21a and 31 of the node piece 3 are formed in a semicircular projection having a sawtooth shape and a diamond pyramid having a diamond shape. Reinforcing bar connector characterized in that it forms at least one or more. 4. The rebar insertion surface 21a and the section piece 3 of the section piece section 21 of the sleeve 2 with a pair of wedge-shaped fixed wedges 5 with a pointed tip. Reinforcing bar connector characterized in that it is fitted in the space between the end surface of the two rebar (1, 1a) tightened by the wedge (4) to the reinforcing bar insertion surface 31 of the). 16. The inclined surface (52) according to claim 15, wherein the fixing wedge (5) has a parallel surface (51) which is composed of all parallel surfaces and an opposite surface of the parallel surface (51) is formed with an inclined surface (52). There is a sawtooth-shaped tooth surface 52a formed between the inner surface of the node piece portion of the sleeve 2 and the end surface of the reinforcing bars 1 and 1a tightened by the wedge 4 by being fitted to the inner surface of the piece piece 3. Reinforcing bar connector, characterized in that the tooth surface (52a) is interlocked with each other in the space in the opposite direction in the space is engaged with each other and the parallel surface (51) is in contact with the end surface of the reinforcing bars (1, 1a). 4. Rebar insertion surfaces 21a and 31 on both sides according to claim 2 or 3, based on the node piece portion 21 of the sleeve 2 and the center grooves 21c and 33 of the inner surface of the piece piece 3. Reinforcing bar connector, characterized in that for forming the radius of the grooves (21b, 32) different from each other. 18. The fastening unit 22 having a larger radius is coupled to a smaller radius of the node portion 21, and a smaller radius fixing portion 22 is provided at a larger side of the node portion 21. Reinforcing bar connector, characterized in that to form a sleeve (2) in combination.

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