KR20070025844A - Reinforcing bar coupling with threaded sleeve - Google Patents

Abstract

A reinforcing bar coupling device through screw-type sleeves is provided to secure the interval of a reinforcing bar of a connection part and improve the stability of a concrete structure by installing the sleeve and the hanging protrusion of the combining socket and narrowing the diameter of the coupling device. A reinforcing bar coupling device through screw-type sleeves is composed of one sleeve(2) formed with a female screw part(31) on the inner surface and formed with a male screw part(23) on the outer surface, another sleeve(2a) formed with a female screw part on the inner surface and formed with a first hanging protrusion(26) whose one end has a horizontal surface vertically placed for the center shaft line to the shaft direction, a combining socket(3) formed with a female screw part screw-combined with the male screw part of one sleeve and formed with a hanging protrusion(32) projected to the circle center direction on the inner surface of one end, and reinforcing bars(1,1a) formed with the male screw parts at the end to be screw-combined at the female screw parts of the two sleeves. A taper projection part(24) is projected like a taper shape, and a taper recessed groove part(25) has a recessed groove like a funnel.

Description

Reinforcing bar coupling with threaded sleeve

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

Figure 2 is a partially cut perspective view of the coupling state showing a first embodiment of the present invention

3 is a perspective view of a coupled state according to a first embodiment of the present invention;

4 is a longitudinal sectional view of an exploded state according to the first embodiment of the present invention;

5 is a longitudinal sectional view of the coupled state according to the first embodiment of the present invention;

6 is a longitudinal sectional view of the coupled state according to the first embodiment of the present invention;

7 is a perspective view showing a state in which the pre-assembled reinforcing bar mesh in the first embodiment of the present invention

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

9 is a partially cutaway perspective view of a coupled state showing a second embodiment of the present invention;

10 is a perspective view of a coupled state according to a second embodiment of the present invention

11 is a longitudinal sectional view of an exploded state according to a second embodiment of the present invention;

12 is a longitudinal sectional view of a coupled state according to a second embodiment of the present invention;

13 is a longitudinal cross-sectional view of a coupled state according to a second embodiment of the present invention;

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

15 is a partially cutaway perspective view of a coupled state showing a third embodiment of the present invention;

16 is a perspective view of a coupling state according to a third embodiment of the present invention;

17 is a longitudinal cross-sectional view of an exploded state according to a third embodiment of the present invention;

18 is a longitudinal cross-sectional view of a coupled state according to a third embodiment of the present invention;

19 is a longitudinal cross-sectional view of a coupled state according to a third embodiment of the present invention;

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

21 is a partially cutaway perspective view of a coupled state showing a fourth embodiment of the present invention;

22 is a perspective view of a coupled state according to a fourth embodiment of the present invention

23 is a longitudinal sectional view of an exploded state according to a fourth embodiment of the present invention;

24 is a longitudinal sectional view of the coupled state according to the fourth embodiment of the present invention;

25 is a longitudinal cross-sectional view of a coupled state according to a fourth embodiment of the present invention;

26 is a longitudinal sectional view of an exploded state according to a fifth embodiment of the present invention;

27 is a longitudinal sectional view of the coupled state according to the fifth embodiment of the present invention;

28 is a longitudinal sectional view of the engaged state according to the fifth embodiment of the present invention;

29 is a longitudinal sectional view of an exploded state according to a sixth embodiment of the present invention;

30 is a longitudinal sectional view of the coupled state according to the sixth embodiment of the present invention;

31 is a longitudinal cross-sectional view of a coupled state according to a sixth embodiment of the present invention;

32 is a longitudinal sectional view showing a state in which the prior art is combined;

33 is a longitudinal sectional view showing a state in which the prior art is combined;

34 is a longitudinal sectional view showing a state of engagement of the prior art;

<Explanation of symbols for main parts of the drawings>

1, 1a: Reinforcing bar (deformed bar) 1b, 1c: Threaded bar reinforcing bar

11: parallel male thread part 12: tapered male thread part

13: screw joint

2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k: sleeve

21: parallel female thread portion 21a: female thread portion

22: taper female threaded portion 23: male threaded portion

24: tapered protrusion 25: tapered groove groove

26: the first jam jaw 27: the second jam jaw

28: stopper 29: stopper

3, 3a: mating socket

31: female thread

32: first jam jaw 33: second jam jaw

4: Coupler

41: additional thread

5: lock nut

The present invention relates to a mechanical reinforcing connector connecting the reinforcing bars used in the reinforcement concrete construction with a screw type, in detail to connect the reinforcing bars of two or more pre-assembled reinforcing bar network in the longitudinal direction A male thread is formed at the end, and the two sleeves are provided with female threads of the same size to which the male thread of the reinforcing bar is fastened, and each screw is screwed to the end of the reinforcing bar. To connect the reinforcing bar by the threaded sleeve, the main bar of the prefabricated reinforcing bar is fixed integrally by the band bar and can be easily and firmly connected with the screw type when the reinforcing bar can not be screwed with the female thread coupler. It is about.

Rebar prefabrication method is mainly used in the construction of cast-in-place concrete pilings and pier or pier or in large buildings. The connection of the network uses a mechanical connection method of overlapping joints, gas welding or joints of equal or higher strength.

However, the overlapping joint is a method in which the stress of the reinforcing bar is transmitted as the concrete is cured and attached to the reinforcing bar when it is connected with the reinforcing bar by tying up the reinforcing bars.It is believed that the concrete is semi-permanent and does not weaken depending on the adhesive force of the concrete. However, concrete is cracked on the surface due to neutralization problems, salt problems, etc. When water and air carbon dioxide are infiltrated, the steel is corroded and the volume expands. There is a problem. In addition, as the reinforcing bars overlap, the instantaneous spacing of the reinforcing bars becomes narrow, and the filling of mortar becomes poor, and there is a problem in that the coating thickness of concrete is not sufficiently secured.

The gas welding joint is connected with rebar by heating the end of the rebar with oxygen-acetylene gas flame and applying pressure with a pressure welding machine.Thermal deformation of the reinforcing base material causes the joint to be weaker than the rebar base material. This non-uniform problem always exists and works with heating and pressurizing equipment, so there is a problem that the construction cost increases as the air speed increases due to the slow working speed, and the use is gradually decreasing.

32 to 34, a parallel male thread 11 is formed on the one reinforcing bar 1 in a long direction in order to connect the reinforcing bars 1 and 1a of the pre-assembled rebar network in the longitudinal direction. The other one of the reinforcing bars (1a) to form a parallel male thread portion 11 with a short length, the cylindrical coupler (4) having a female thread formed on the inner surface in advance to the rebar (1) in which the long parallel male thread portion (11) is processed After fastening, buttling the ends of the two rebars (1, 1a), loosening the pre-fastened coupler (4), screwing the short reinforcing bar (1a) and tightening the lock nut (5) to secure the two rebars (1, 1a) is connected to the threaded coupler (4), but the threaded portion is formed at least half of the combined length of the coupler (4) and the lock nut (5) when the coupler (4) is completed tightening As the additional screw part 41 is exposed from the coupler, this part Due to the weak force, the safety of the joint is inferior, and the main bars of pre-assembled rebar networks have large diameters, so the load is large, so the rebar network is assembled and the process of separating and transporting the rebar network from the assembly jig or crane for assembly. As the rebar network is deformed during the lifting process, each rebar is out of its original position, so it takes a lot of effort and work time to match the center line of the rebar, and screwing the rebar end with the coupler (4). It is very difficult, and because the reinforcing bar is lifted and joined by a crane, the main bar and the band bar are fixed by welding or the like to be integrated, so that both ends of the two bars are fixed as shown in FIG. 33. Start point is different, it is not possible to rotate the bar to match the start point If you adjust the distance between the two rebars (1, 1a) only screw tightening is possible, but it is difficult to fine-tune with equipment such as a crane, but after connecting two or more reinforcing bar, the distance cannot be adjusted because screw connection is impossible. If the starting point of the screw does not match and the two screws (1, 1a) are forcibly tightened with the coupler (4) even though the screw is not fastened, the threads of the bars (1, 1a) and the coupler (4) are damaged and the joint is connected. Since the condition becomes weak and the rebar end is inside the coupler, the coupler and the rebar seem to be normally engaged on the outside, so there is a risk that the worker or the construction supervisor can use it without being aware of the connection.

In addition, when the reinforcing bar in the field is difficult to connect by screwing while matching the center line of the long rebar, there is a problem that the joint is excessively increased by cutting to 4m to 5m in length and the work speed is slowed. In addition, there is an inconvenience in that the lock nut is fastened in order to eliminate the air gap between the fastened screw part after connecting with the coupler 4.

As described above, the conventional method of connecting the prefabricated reinforcing bar network has been a big problem in the construction site using the rebar prefabrication method because the safety of the joint is weak and the joint work is inconvenient.

The present invention solves the problems of the conventional method of connecting the pre-fabricated reinforcing bar network to devise a reinforcing bar method to improve the construction and safety and economics due to air shortening, in particular the reinforcing bar of the conventional pre-assembled rebar network Among the methods, the screw is formed at the end of the reinforcing bar and is connected to one coupler with a female thread on the inner surface. Since each bar is already integrally connected with the band bar, the rebar cannot be rotated, so that the starting point of the threads of the both ends of the bar can be matched. It is difficult to match the centerline of the reinforcing bars due to the deformation of the rebar network, and it is impossible to couple or screw the coupler, and the threaded rebar joint method has a small cross-section of the coupler and the joint is relatively solid. Threaded sleeves solve difficult problems It is an object to provide a reinforcement of the connector.

In order to achieve the above object, the present invention, in connecting the prefabricated reinforcing bar network to form a male threaded portion at the ends of the two reinforcing bars, two male threads of the same standard to be screwed with the male threaded portion of the two reinforcing bars are formed on the inner surface It is provided with a connector consisting of a coupling socket for coupling the sleeve and the two sleeves coupled to the two reinforcement to be integrally coupled, first insert the coupling socket into one of the reinforcing bars and screw the two sleeves to each of the two reinforcing bars to integrate Next, the two sockets are screwed together to connect the two reinforcing bars, and the reinforcing bar meshes cannot be rotated because the reinforcing bars are fixed and it is difficult to align the central axes of the two bars that are opposed in the longitudinal direction. The connection allows the joint to be rugged and to speed up operation to reduce air. It is characterized by.

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

1 to 7 are a perspective view and a cross-sectional view showing a first embodiment of the present invention as described in the brief description of the drawings.

According to the figure, the two sleeves (2, 2a) are provided with a reinforcing connector composed of a coupling socket (3) which separates the two sleeves (2, 2a) and integrally restrains the two sleeves (2, 2a). 2a) is integrated by screwing the two rebars (1, 1a), respectively, and then connecting the two reinforcing bars (1, 1a) by screwing the two sleeves (2, 2a) with a coupling socket (3).

One sleeve (2) is cylindrical in shape and has a tapered shape in which a parallel female screw portion (21) is formed on the inner surface and a male screw portion (23) is formed on the outer surface, and one end portion in the axial direction becomes smaller in diameter toward the end direction. The protrusion part 24 is formed, and the inner surface of the tapered protrusion part 24 is formed with a stopper 28 protruding in the form of a circular band in a circular center direction, and becomes a limit point at which the screw is fastened to the reinforcing bar, thereby acting as a lock nut. By removing the voids of the fastened screw part by applying the initial tensile force to prevent the deformation of the joint part against the tensile load of the concrete member to ensure the safety of the structure.

The other sleeve 2a is cylindrical in shape, and the parallel female threaded portion 21 is formed on the inner surface thereof, and one end portion in the axial direction decreases in diameter toward the center thereof, and the taper of the one sleeve 2 is recessed in the form of a funnel. A tapered groove portion 25 is formed of a tapered groove surface of the same size so that the protrusion 24 is inserted to be accurately engaged, and the other end portion in the axial direction has a first locking jaw formed of a surface parallel to the central axis in the vertical direction. 26 is formed so that the first locking jaw 32 of the coupling socket 3 to be described later in contact with the engaging action occurs, the inner surface of the tapered groove 25 is a stopper protruding in the shape of a circular band in the direction of the center of the circle (29) is formed and becomes the limit point at which reinforcing bars are screwed, so that the voids of the screwed parts are removed by applying an initial tensile force to the joints, such as locknut, Avoid deformation of the pubic hair. However, by forming the parallel female threaded portion 21 of the other sleeve 2a with the left screw and the parallel male threaded portion 11 of the reinforcing bar 1a screwed thereto with the left hand thread, the coupling socket 3 is formed with one sleeve ( 2) when the first locking jaw 32 of the coupling socket (3) is mutually friction with the first locking jaw (26) of the other sleeve (2a) when the screw is fastened to the other one (2a) Even when rotated together, the screw fastening of the reinforcing bars 1a and the sleeve 2a may be prevented from loosening.

Although not shown, a male screw portion 23 is formed on an outer surface of one sleeve, and one end in the axial direction is formed with a tapered recess 25 formed of a funnel-shaped groove, and one end in the axial direction of the other sleeve is Even if the tapered protrusion 24 is formed so that the one end in the axial direction is tapered so as to fit snugly in the tapered groove 25, the function is the same.

Although not shown, the inner surface of the tapered protrusion 24 of one sleeve 2 is completely sealed so that it is the limit point for screwing in rebar in the same manner as the stopper 28, and the other sleeve 2a. The inner surface of the tapered groove 25 of the can be completely sealed to be the limit point that the rebar is screwed in the same way as the stopper 29.

Coupling socket (3) is screwed with the one sleeve (2) while wrapping the other sleeve (2a) as a cylindrical shape, the inner diameter is formed slightly larger than the outer diameter of the other sleeve (2a) An internal thread portion 31 is formed on the inner surface of the sleeve 2 to be screwed with the male screw portion 23 of the sleeve 2, and an inner surface of the one end portion is formed with a first latching jaw 32 protruding in a circular band shape in a circular center direction. It is supported by the first engaging jaw 26 of the other sleeve 2a while acting to engage.

However, when the locking jaw of the sleeve 2a is formed in the middle portion in the axial direction, the diameter of the coupler 3 is also increased while the diameter increases by the height of the locking jaw, but the shaft of the sleeve 2a as in the first embodiment of the present invention. If one end of the direction is formed in parallel in the transverse direction and the end is used as a locking step, the diameter can be made as small as the thickness of the sleeve added to form the locking step in the middle part, so that the instantaneous interval between the reinforcing bars can be sufficiently secured. Will be.

The parallel male threaded portion 11 formed at the ends of the rebars 1 and 1a screwed to the two sleeves 2 and 2a is formed to have substantially the same length as the parallel female threaded portions 21 of the two sleeves 2 and 2a. There is no thread part exposed from the sleeve (2, 2a) after screw fastening, and the boundary line between the thread part and the reinforcing body is formed by the incomplete thread part, and the screw bone is gradually formed to the normal depth toward the end, so that the stress is not concentrated on the boundary line for the tensile load. Do not.

The outer surface of the tapered protrusion 24 of the one sleeve 2 and the outer surface of the other sleeve 2a and the outer surface of the coupling socket 3 are formed by splicing, knurling and polygonal cross section. Makes it easy to use tools such as spanners.

Although not shown, the diameter of the parallel male screw portion may be differently formed according to the diameter of the two steel bars to be connected, and the parallel female thread portions of the two sleeves screwed thereto may be formed to have different diameters.

The parallel female threaded portion 21 of the two sleeves 2 and 2a and the parallel male threaded portion 11 at the ends of the reinforcing bars 1 and 1a are formed by one or more threads, and the male threaded portion 23 of the one sleeve 2 The female thread portion 31 of the coupling socket 3 may also be formed by more than one row of screws, and the shape of the screws formed on the sleeves 2 and 2a, the coupling socket 3 and the rebars 1 and 1a may be a triangular shape. Screws, round screws, trapezoidal screws, etc. can be formed in various ways, and the rebar threading method can be cut or rolled.

Looking at the fastening method and the principle of operation according to the configuration of the first embodiment of the present invention, in the construction for vertically joining the two pre-assembled reinforcing bar network, first the parallel male screw portion at the upper end of the reinforcing bar and the lower end of the upper rebar network (11), the coupling socket (3) is first inserted into the upper end of the reinforcing bar of the lower reinforcing bar, and the sleeves (2, 2a) are respectively fastened to the parallel threaded portions (11) of the reinforcing bar ends of the two reinforcing bar networks. The air gap between the screws of the reinforcing bars 1 and 1a and the sleeves 2 and 2a is tightened by rotating and tightening the sleeves to the stops 28 and 29 of the sleeves 2 and 2a that are no longer screwed in. To avoid deformation of the seam against the tensile load of the concrete member. Then, by lifting the upper reinforcing bar network with the crane to match the center axis of the two reinforcing bar network, while adjusting each of the reinforcing bar center line to coincide, gradually lowering the upper reinforcing bar network tapered projection of the sleeve (2) fastened to the reinforcing bar of the upper reinforcing bar network (24) is guided by the tapered concave groove 25 of the sleeve (2a) of the lower reinforcing bar, and the center line is naturally aligned and then coupled to the upper reinforcing bar by lifting the coupling socket (3) pre-inserted into the reinforcing bar of the lower reinforcing bar When screwing into the sleeve (2) of the coupling, the reinforcing of the two reinforcing bar is completed, and when the coupling socket (3) is completely tightened between the two sleeves (2, 2a) are completely in close contact, the voids of the screw thread is removed to remove the concrete member Deformation does not occur with respect to the tensile load of and thus it is possible to prevent the cracking of the concrete generated from the joint.

Reinforcing bar joint method as the first embodiment of the present invention as described above is to be connected to the reinforcing bar when the bar is already reinforced, such as pre-assembled reinforcing bar is not flowing, in particular, two reinforcing bars (1, 1a) Even if the screw starting point of the end is different, the screw of the sleeve 2 and the coupling socket 3 can be screwed and guided by the tapered recess 25 of the sleeve 2a of the lower reinforcing mesh of the sleeve 2 of the upper reinforcing mesh. As the tapered protrusion 24 is naturally engaged, the center lines of the two sleeves 2 and 2a coincide, so that the screwing of the sleeve 2 and the engaging socket 3 is possible. In addition, a male thread is formed on the rebar with the same length as the female screw portion of the sleeve so that the threaded portion in which the tensile stress is weaker than that of the base material after screwing the rebar with the sleeve is not exposed.

In addition, the connector of the first embodiment of the present invention can be applied to the reinforcement in the field in addition to the connection of the prefabricated reinforcing bar network, the current 4m to 5m to easily connect the long rebar with a screw type It is connected to the coupler by cutting to a length, but can be easily and quickly connected to the full length as it is without cutting the rebar with the connector of the present invention.

8 to 13 are a perspective view and a cross-sectional view showing a second embodiment of the present invention.

The structure of the two sleeves 2b and 2c and the coupling socket 3 of the second embodiment of the present invention and the structure of the threaded portions of the end portions of the bars 1 and 1a are the same as those of the first embodiment of the present invention. The inner surface of the two sleeves 2b and 2c is provided with a tapered female screw portion 22 in which female threads are formed on a tapered surface whose diameter decreases toward the end rather than the parallel female screw portion 21, and the tapered female screw portion 22 and Another feature is that the tapered male threaded portion 12 is formed on the outer surface of the conical shape in which the diameter decreases toward the end of the reinforcing bars 1 and 1a with the same size to be screwed, and the sleeves 2b and 2c are provided. The tapered female threaded portion 22 of the sleeves 2b and 2c serves as a guide when screwing the reinforcing bars 1 and 1a so that the tapered male threaded portion 12 at the ends of the reinforcing bars 1 and 1a is easily provided. Tapered number of reinforcing bars 1 and 1a into the tapered female threaded portion 22 of the sleeves 2b and 2c while being screwed to 2c). Since the threaded part 12 is drawn deeply by linear movement only without screwing, the coupling is completed by only 4 to 5 tightening rotations, so that the construction is good in the field. There is an advantage that does not require a separate lock nut because the joint is not deformed.

The fastening method of the second embodiment of the present invention is the same as the first embodiment of the present invention.

14 to 19 are a perspective view and a cross-sectional view showing a third embodiment of the present invention.

The structure in which the threads of the two sleeves 2d and 2e and the coupling socket 3a and the ends of the reinforcing bars 1 and 1a of the third embodiment of the present invention are formed is the same as the first embodiment of the present invention, and only the other The second catching jaw 27 is further provided with the step of decreasing the diameter of the outer surface of the tapered groove 25 of the sleeve 2e of the sleeve 2e, and the engaging socket 3a is the other sleeve 2e. As the inner diameter of the first catching jaw (32) increases to correspond to the second catching jaw (27) of the second catching jaw (33) which is formed stepwise is further provided that the catching jaw is formed in multiple stages As such, forming the latching jaw in multiple stages on the sleeve 2e and the coupling socket 3a can enhance the safety of the joint by dispersing the stress to the two locking jaws when the tensile load of the concrete member is applied. Although not shown, two or more locking jaws may be formed in multiple stages on the other sleeve 2e and the coupling socket 3a.

20 to 25 are perspective and cross-sectional views showing a fourth embodiment of the present invention.

The structure in which the two sleeves 2f and 2g of the fourth embodiment of the present invention and the threaded portions of the coupling sockets 3a and the reinforcing bars 1 and 1a are formed is the same as the second embodiment of the present invention, and only the other The second catching jaw 27 is further provided with a step of reducing the diameter of the outer surface of the tapered recess 25 of the sleeve 2g of the sleeve 2g, and the coupling socket 3a is the other sleeve 2g. Another feature is that the locking jaw is formed in multiple stages by additionally providing a second locking jaw 33 corresponding to the second locking jaw 27 of the second locking jaw (27). Forming the jaw prevents the stress from concentrating on one locking jaw when the tension load by the concrete member is applied, thereby improving the safety of the joint. Although not shown, two or more locking jaws may be formed in multiple stages on the other sleeve 2g and the coupling socket 3a.

26 to 28 are cross-sectional views illustrating a fifth embodiment of the present invention.

The structure of forming the two sleeves 2h and 2i and the coupling socket 3 of the fifth embodiment of the present invention is the same as that of the first embodiment of the present invention. It is provided to connect (1b, 1c), the same screw thread 13 of the threaded reinforcing bars (1b, 1c) to the inner peripheral surface of one sleeve (2h) and the other sleeve (2i) It is another feature that the female screw portion 21a is formed.

29 through 31 are cross-sectional views illustrating a sixth embodiment of the present invention.

The structure of forming the two sleeves 2j and 2k and the coupling socket 3a of the sixth embodiment of the present invention is the same as that of the third embodiment of the present invention. It is provided to connect the (1b, 1c), the same screw thread 13 of the threaded reinforcing bars (1b, 1c) to the inner peripheral surface of one sleeve (2j) and the other sleeve (2k) It is another feature that the female screw portion 21a is formed.

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

As described above, in the present invention, the prefabricated rebar network is firmly connected with a screw type. In order to connect the prefabricated rebar network, a screw is formed at the end of the rebar, and the coupler is connected to the rebar. Rebar connector of the present invention is provided because it is impossible to fasten the coupler by rotating the reinforcing bar, and it is impossible to match the starting point of the threaded portion of the two rebars, but the screw connection with one coupler is provided, each end with two sleeves It is fastened to the reinforcing bar of the lower reinforcing bar when fastening the screw with the reinforcing bar formed in the threaded part, buttling the ends of the two sleeves together, and then screwing the fastening socket to the sleeve for easy integration. Guided by the tapered groove of the sleeve The tapered protrusion of the sleeve naturally coincides with the center line, so that the fastening socket can be completely screwed into the sleeve, greatly improving the safety of the joint and making the connection work quickly, thereby improving the economics of reducing the cost by air shortening. The total length of the coupler where the tensile stress is weaker than that of the reinforcing bar base material in order to pre-tighten the single reinforcing bar as in the prior art by forming a male thread at the reinforcing end of the prefabricated reinforcing bar network equal to the length of the female thread of the sleeve. This increases the safety of the joint by eliminating the need for long machining, and in the way of direct reinforcement in the field, it is possible to connect long rebars in the entire length without short cutting so that they can be connected with a screw coupler. Fast, sleeve and mating Because of the locking step by reducing the diameter of the connector installed at one end is secured sufficiently joints reinforced net interval so that the coarse aggregate can get an effect that the safety of the concrete structure increase.

Claims (15)

A sleeve having an internal thread portion formed on an inner surface thereof and an external thread portion 23 formed on an outer surface thereof; And Another sleeve having a female threaded portion formed therein and a first catching jaw 26 made of a parallel surface having one end perpendicular to the central axis in the axial direction; And An inner thread portion 31 is formed on the inner surface of the sleeve and is screwed with the male threaded portion 23 of the one sleeve, and is circularly centered on the inner surface of the one end portion so as to engage with the first locking jaw 26 of the other sleeve. Coupling socket formed with a locking projection (32) protruding in the direction; And Reinforcing bar connector by the threaded sleeve, characterized in that it comprises a reinforcing bar (1, 1a) is formed at the end of the two threads to be screwed to the female threaded portion. According to claim 1, wherein the tapered protrusion 24 is formed in which one end in the axial direction of one sleeve protrudes in a tapered shape, and one end in the axial direction of the other sleeve fits snugly. Reinforcing bar connector by a threaded sleeve, characterized in that the tapered groove portion 25 is formed of a funnel-shaped groove. According to claim 1, wherein one end of the sleeve in the axial direction of the tapered groove portion 25 is formed of a funnel-shaped groove, the other end of the sleeve in the axial direction of the tapered groove portion 25 is Reinforcing bar connector by the threaded sleeve, characterized in that the tapered projection portion 24 is formed in one end in the axial direction to be tapered to fit. The threaded sleeve according to claim 2 or 3, characterized in that stoppers (28, 29) protruding in the circumferential direction are formed on the inner surfaces of the tapered protrusion (24) and the tapered groove groove (25) of the sleeve. Due to rebar connector. 5. The end of reinforcing bars 1 and 1a according to claim 4, wherein a parallel female screw portion 21 is formed on the inner surfaces of the two sleeves 2 and 2a in an axial direction and screwed to the parallel female screw portion 21. Reinforcing bar connector with a threaded sleeve, characterized in that the parallel male screw portion (11) is formed in the. 5. The tapered female threaded portion 22 is formed on the inner surface of the two sleeves 2b and 2c, and the female threaded portion is formed on the tapered surface whose diameter decreases toward the end, and is screwed to the tapered female threaded portion 22. Rebar connector by threaded sleeve, characterized in that the tapered male threaded portion 12 is formed at the end of the reinforcing bars (1, 1a). 5. A parallel female screw portion (21) axially parallel is formed on the inner surfaces of the two sleeves (2d, 2e), and on the outer surface of the opposite side of the tapered groove portion (25) of the other sleeve (2e). A second catching jaw 27 is further provided with a step of reducing the diameter and the second catching jaw 33 corresponding to the second catching jaw 27 of the other sleeve 2e in the coupling socket 3a. ) Is further provided with a latching jaw formed in multiple stages, and the parallel male threaded portion 11 is formed at the ends of the reinforcing bars 1 and 1a so as to be screwed to the parallel female threaded portions 21 of the two sleeves 2d and 2e. Reinforcing bar connector by the threaded sleeve, characterized in that. 5. The tapered female threaded portion 22 is formed on the inner surfaces of the two sleeves 2f and 2g, the diameter of which decreases toward the end, and the opposite side of the tapered groove 25 of the other sleeve 2g. A second catching jaw 27 is additionally provided on the outer surface with a step of reducing the diameter, and a second catching jaw corresponding to the second catching jaw 27 of the other sleeve 2g on the coupling socket 3a. (33) is further provided with a locking step is formed in multiple stages, the tapered male threaded portion 12 at the end of the reinforcing bars (1, 1a) to be screwed to the tapered female threaded portion 22 of the two sleeves (2f, 2g) Reinforcing bar connector by the threaded sleeve, characterized in that is formed. 5. The threaded sleeve according to claim 4, wherein a female thread portion (21a) is formed on the inner surfaces of the two sleeves (2h, 2i) to which the threaded nodes (13) of the threaded bars (1b, 1c) are fastened. Due to rebar connector. 5. The female threaded portion 21a is formed on the inner surfaces of the two sleeves 2j and 2k, to which the threaded portions 13 of the threaded bars 1b and 1c are fastened, and the other sleeve 2k. The second catching jaw 27 is further provided on the outer surface of the tapered recess 25 of the taper recess 25 on the opposite side, and the second catching jaw of the other sleeve 2k is provided on the coupling socket 3a. Rebar connector by the threaded sleeve, characterized in that the locking jaw is formed in multiple stages by further comprising a second catching jaw (33) corresponding to (27). The process according to claim 5 or 6 or 7 or 8 or 9 or 10, wherein the sleeves 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, Reinforcing bar connector with a threaded sleeve, characterized in that the outer surface of 2k) and the outer surface of the engaging socket (3, 3a) is processed in the form of any one of splicing, knurling and polygonal cross section. The female threaded portion and one of the sleeves 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g according to claim 5 or 6 or 7 or 8 or 9 or 10. The male threaded portion 23 of the sleeves 2, 2b, 2d, 2f, 2h, 2j and the female threaded portion 31 of the engaging socket 3, 3a are formed of one or more rows of screws. One end of the reinforcing bars 1, 1a formed in the form of any one of a screw and a trapezoidal screw and screwed to the female thread of the sleeves 2, 2a, 2b, 2c, 2d, 2e, 2f, and 2g. Reinforcing bar connector by the threaded sleeve, characterized in that the screw is formed in the form of any one of a triangular screw, a round screw, a trapezoidal screw. The male threaded portion of the reinforcing bar 1a according to claim 5 or 6 or 7 or 8, wherein the female threaded portion of the other sleeve 2a, 2c, 2e, 2g is formed with a left-handed thread and screwed thereto. Reinforcing bar connector by the threaded sleeve, characterized in that formed by. The method according to claim 5 or 6 or 7 or 8 or 9 or 10, and one sleeve (2, 2b, 2d, 2f, 2h, 2j) to connect the rebar of different sizes The diameters of the female thread portions of the other sleeves 2a, 2c, 2e, 2g, 2i, and 2k are differently formed, and the diameters of the reinforcing bars 1, 1a, 1b, and 1c screwed thereto are also formed to have different diameters, respectively. Reinforcing bar connector with a threaded sleeve, characterized in that. The inner surface of the tapered protrusion 24 of one sleeve 2, 2b, 2d, 2f, 2h, 2j according to claim 5 or 6 or 7 or 8 or 9 or 10. This fully sealed, reinforcing bar connector with a threaded sleeve, characterized in that the inner surface of the tapered groove portion 25 of the other sleeve (2a, 2c, 2e, 2g, 2i, 2k) is also completely sealed.

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