JP2016532029A - Reinforcing bar coupler for spiral rebar - Google Patents

Abstract

The present invention provides a reinforcing bar coupler for a helical reinforcing bar, in which a pair of helical reinforcing bars is accommodated in a temporarily assembled state, and a coupling force is improved by simultaneously supplying a compressive force and a tensile force to the helical reinforcing bar during complete assembly. . According to the present invention, there is provided a reinforcing bar coupler for a helical rebar, in which a part of each of a pair of helical reinforcing bars is housed and supported by being screwed into a helical protrusion of the helical reinforcing bar, A part is inserted into and screwed into the support on both sides, and the inside is constituted by a pair of restraining tools that are screwed into the spiral protrusions and restrain the pair of helical rebars. A tensile force and a compressive force are simultaneously supplied to each of the helical reinforcing bars. [Selection] Figure 11

Description

  The present invention relates to a reinforcing bar connector, and in particular, a spiral in which a pair of spiral reinforcing bars is accommodated in a temporarily assembled state, and a coupling force is improved by simultaneously supplying a compressive force and a tensile force to the helical reinforcing bar during complete assembly. The present invention relates to a reinforcing bar connector for reinforcing bars.

  The present invention relates to a reinforcing bar coupler for a spiral reinforcing bar that can connect a pair of reinforcing bars without rotating the reinforcing bar.

  The present invention relates to a reinforcing bar connector for a spiral reinforcing bar, which has improved durability by restricting shaking and loosening due to tension and compression applied from the outside when a pair of reinforcing bars are connected.

  The present invention relates to a reinforcing bar coupler for a spiral reinforcing bar, which can be easily checked for the presence or absence of misassembly by seeing through the inside with the naked eye after connecting the reinforcing bar.

  In general, in the construction of reinforced concrete structures, as a framework, in order to improve the degree of adhesion stress with concrete, mainly deformed reinforcing bars with two protruding ribs and two ribs symmetrically over the entire length in the vertical direction are mainly used. Reinforcing bars are produced in a limited length for convenience of transportation and work, so they are generally used in connection with each other, but there are various types of methods for connecting deformed reinforcing bars. .

  The most widely used method is a lap joint method in which the ends of two reinforcing bars are overlapped and tied with a binding wire, but this method is weak in safety because the joint part depends only on the adhesion of the reinforcing bars. The gas pressure welding method, in which the ends of two rebars are heated with an oxyacetylene gas flame and pressurized and connected with a pressure welding machine, causes secondary deformation due to thermal deformation in the joint. There is a problem that the part becomes weaker than the reinforcing steel base material, and both ends of the two reinforcing bars are installed or forged to make the ribs and nodes circular, and then the male screw is machined by cutting and rolling to the female screw The threaded joint system connected by the type coupler has a problem that it becomes weaker than the base material because an external force is applied to the reinforcing bar and the joint part is deformed differently from the reinforcing steel base material.

  In the regulations concerning the production of reinforcing bars, in order to prevent them from easily collapsing when heat is applied to the reinforced concrete structure, the reinforcing bars should be produced while maintaining the material properties that are close to those of the concrete. However, in the provisions regarding the joints of rebars in Korea, the lap joint method is not permitted for rebar joints whose name is D29 (diameter 29 mm) or more. However, these methods are joint methods that change the original material properties of the reinforcing bars by performing secondary processing to apply heat and external force to the reinforcing bars, and these connecting methods are unavoidable. The reason for this is that many reinforcing bar couplers that can be connected without changing the original material properties of the reinforcing bars have been developed.

  In recent years, according to the necessity of the best connection method, as shown in FIG. 1, screw joint reinforcing bars 1 and 1a in which a thread-like threaded joint 11 is formed on the outer surface of the reinforcing bar have been developed. It connects with the sleeve 4z which has the internal thread part 41 to which the screw node 11 of the reinforcing bar 1 and 1a is fastened.

  However, since the pitch of the screw nodes 11 of the reinforcing bars 1 and 1a is long and the screw form is not precise, the thread groove of the female thread portion 41 of the sleeve 4z is made more than the screw nodes 11 of the reinforcing bars 1 and 1a so that the fastening can be performed smoothly. Since the two reinforcing bars 1 and 1a are fastened with the sleeve 4z, there is a problem that play between the sleeve 4z and the reinforcing bars 1 and 1a is increased, the fastening is easily loosened, and slip occurs.

  In order to solve this problem, lock nuts 5z are fastened to both ends of the sleeve 4z, and the grout material is filled into the sleeve 4z to remove play. However, there is an operation of separately preparing and filling the grout material. It is complicated and the strength of the grout material is only about 10% of the reinforcing bar, so that safe binding cannot be obtained, the pitch of the reinforcing bars 1 and 1a is long, and the inclination angle of the thread is large, so that the lock nut 5z is fastened. A lot of force is required, and there is a safety problem that the lock nut 5z is easily loosened by external vibration.

  Also, since the two lock nuts 5z are not temporarily joined together with the sleeve 4z and are provided as separate parts, it is difficult to manage the parts, and the lock nut 5z is relatively small. Since there is a high risk of occurrence, there is an urgent need for a reinforcing bar connector that can be temporarily connected due to the safety and workability of work, and the characteristics of construction sites that require cost reduction due to work speed. .

  In order to solve this problem, as shown in FIG. 2, Patent Document 1 includes a semicircular sleeve 2 mounted so as to cover the screw node 11, and tightens the lock nut 5 from the left and right sides of the semicircular sleeve 2. A technique is disclosed in which the helical rebar 1a can be connected by applying pressure to both sides of the semicircular sleeve 2 which are inclined.

  However, since the above prior art is also composed of a large number of parts, it still has the problem that storage and management are inconvenient and workability is lowered.

Korean Registered Utility Model No. 0409526

  The present invention has been made in order to solve the above-described problems, and accommodates a pair of spiral reinforcing bars in a temporarily assembled state and combines them by simultaneously supplying a compressive force and a tensile force to the spiral reinforcing bars during complete assembly. An object of the present invention is to provide a reinforcing bar coupler for spiral reinforcing bars with improved force.

  Another object of the present invention is to provide a reinforcing bar coupler for a spiral reinforcing bar that can connect a pair of reinforcing bars without rotating the reinforcing bar.

  Furthermore, an object of the present invention is to provide a reinforcing bar connector for a spiral reinforcing bar with improved durability by restricting shaking and loosening due to tension and compression applied from the outside when a pair of reinforcing bars are connected.

  Furthermore, an object of the present invention is to provide a reinforcing bar connector for a spiral reinforcing bar that allows easy confirmation of the presence or absence of misassembly by seeing through the inside with the naked eye after connecting the reinforcing bar.

  According to the present invention, there is provided a reinforcing bar coupler for a helical rebar, in which a part of each of a pair of helical reinforcing bars is housed and supported by being screwed into a spiral protrusion of the helical reinforcing bar, and partly on both sides of the supporting tool. Is inserted into the support and screwed together, and the inside is constituted by a pair of restraining tools that are screwed into the spiral protrusions and restrains the pair of helical rebars. Each is supplied with a tensile force and a compressive force simultaneously.

  The pair of restraints has the same shape.

  On both sides of the support device, there are provided inclined portions formed by inclining male screws to be engaged with the restraining device, and inside the support device are provided reinforcing bar coupling screws having a pitch corresponding to the spiral protrusions. It is characterized by being able to.

  The inner side of the restraint is provided with a female screw having a pitch corresponding to the male screw and a protrusion receiving screw having a pitch corresponding to the spiral protrusion, and the male screw and the female screw are provided with protrusions. It has a pitch different from that of the screw and the reinforcing bar connecting screw.

  A sawtooth screw is applied to the male screw and the female screw.

  One side of the support is provided with an inspection hole for confirming the position of a pair of spiral reinforcing bar ends inserted into the support from the outside.

  The rebar coupler for a spiral rebar according to the present invention is configured to rotate in a temporarily assembled state to accommodate a pair of spiral rebar ends inside, and to simultaneously supply a compressive force and a tensile force to the helical rebar during complete assembly. The

  Moreover, since this invention can perform a pair of reinforcing bar connection in the state which does not rotate a reinforcing bar, there exists an advantage that a usability improves and a coupling force increases.

  Furthermore, the present invention has an advantage that durability is improved because swinging and loosening due to tension and compression applied from the outside when the pair of reinforcing bars are connected is limited.

  In addition, the present invention has the advantage that the presence or absence of misassembly can be easily confirmed by seeing through the inside with the naked eye after rebar connection.

It is a use condition figure which shows the structure of the conventional reinforcing bar connector. It is a disassembled perspective view which shows the structure of the conventional reinforcing bar connector (patent document 1). It is a use condition figure of the reinforcing bar connector for spiral reinforcing bars by the present invention. It is a disassembled perspective view which shows the detailed structure of the reinforcing bar connector for spiral reinforcing bars by this invention. It is a longitudinal cross-sectional view which shows the internal structure of the reinforcing bar connector for spiral reinforcing bars by this invention. It is a disassembled longitudinal cross-sectional view which shows the internal structure of the reinforcing bar connector for spiral reinforcing bars by this invention. It is a longitudinal cross-sectional view which shows the state before the reinforcing bar connection of the reinforcing bar connector for spiral reinforcing bars according to the present invention. It is a longitudinal cross-sectional view which shows the state by which the reinforcing bar was inserted in the inside of the reinforcing bar connector for spiral reinforcing bars by this invention. It is a longitudinal cross-sectional view which shows the state before the coupling | bonding with the other reinforcing bars of the reinforcing bar connector for helical reinforcing bars by this invention. It is a longitudinal cross-sectional view which shows the state which carried out the temporary assembly of a pair of reinforcing bars using the reinforcing bar coupler for spiral reinforcing bars according to the present invention. It is a longitudinal cross-sectional view which shows the contact state with the reinforcing bar outer surface at the time of the completion of a connection of a pair of reinforcing bars using the reinforcing bar connector for spiral reinforcing bars according to the present invention.

  Hereinafter, with reference to FIG. 3, the structure of the reinforcing bar connector for helical rebars (hereinafter referred to as “rebar connecting tool 100”) according to the present invention will be described.

  FIG. 3 is a view showing a usage state of the reinforcing bar connector 100 for helical reinforcing bars according to the present invention.

  It should be noted that terms and words used in this specification and claims should not be interpreted in the usual lexical sense, and the inventor uses the terminology concept to explain his invention in the best way. Based on the principle that it can be defined as appropriate, it should be interpreted with the meaning and concept consistent with the technical idea of the present invention.

  Therefore, the configuration described in the embodiments and drawings described in the present specification is only a preferred embodiment of the present invention, and does not represent all the technical ideas of the present invention, and can be substituted at the time of the present application. It should be understood that various equivalents and variations are possible.

  As shown in the figure, a reinforcing bar connector 100 according to the present invention is for connecting a pair of helical reinforcing bars F in a straight line, and is composed of three parts, and rotates integrally in a temporary assembly state that is not separated. Thus, the ends of the pair of spiral reinforcing bars F are accommodated inside.

  Further, the both ends of the rebar connecting tool 100 in the temporarily assembled state are rotated, and the final connection is completed by simultaneously supplying compressive and tensile forces to the spiral protrusions F ′ formed on the outer surface of the spiral reinforcing bar F.

  More specifically, the reinforcing bar connector 100 accommodates a part of each of the pair of helical reinforcing bars F, and supports the supporting tool 120 by screwing and supporting the helical protrusion F ′ of the helical reinforcing bar F. A part is inserted into and screwed into the support tool 120 on both sides, and the inside is constituted by a pair of restraining tools 140 that are screwed into the spiral protrusions F ′ and restrain the pair of spiral reinforcing bars F. Applies a compressive force in the longitudinal direction to the helical rebar F, and the restraining device 140 supplies a tensile force in the longitudinal direction to the helical rebar F.

  Since the pair of restraining tools 140 are configured to have the same shape, it is easy to manage the parts, and the inside is drilled in the longitudinal direction to communicate with the inside of the support tool 120.

  Further, an inspection hole 122 is drilled in the center of the support tool 120 so that the inside can be visually confirmed.

  Therefore, it can be confirmed with the naked eye where the ends of the pair of spiral reinforcing bars F housed in the support 120 are located.

  Hereinafter, with reference to FIGS. 4-6, the detailed structure of the support tool 120 and the restraint tool 140 is demonstrated.

  4 is an exploded perspective view showing a detailed configuration of the reinforcing bar connector 100 for helical rebar according to the present invention, and FIG. 5 is a longitudinal sectional view showing an internal configuration of the reinforcing bar connector 100 for spiral reinforcing bar according to the present invention. These are the exploded longitudinal cross-sectional views which show the internal structure of the reinforcing bar connector 100 for spiral reinforcing bars according to the present invention.

  As shown in the figure, the support tool 120 has a shape in which the central portion is perforated and the outer diameter of both sides decreases as the end portion is approached.

  In addition, a reinforcing bar coupling screw 126 having a pitch and a size corresponding to the spiral protrusion F ′ is provided inside the support tool 120. The reinforcing bar coupling screw 126 can be screwed into the spiral protrusion F ′ of the helical reinforcing bar F in a state where the ends of the pair of helical reinforcing bars F that are close to or in contact with each other are housed inside.

  A pair of inspection holes 122 are formed in the center of the support tool 120 so that the inside of the support tool 120 can be visually recognized.

  On both sides of the support tool 120, inclined portions 124 whose outer diameter gradually decreases are provided. The inclined portion 124 is formed with a male screw 125 so that the restraining tool 140 and the support tool 120 can be screwed together, and a sawtooth screw is applied as shown in the enlarged view of FIG.

  Therefore, when a force in a direction away from each other is applied in a state where the support tool 120 and the restraint tool 140 are coupled to each other, a sufficient coupling strength can be exerted regardless of the inclination of the inclined portion 124.

  On the other hand, the restraining tool 140 is configured as a pair having the same shape, and is restrained so that the pair of spiral reinforcing bars F does not move by being screwed into the spiral reinforcing bar F and the support tool 120 at the same time.

  More specifically, the restraining tool 140 has a cylindrical shape whose inside is perforated in the longitudinal direction, and a protrusion accommodating screw 144 is provided inside.

  The protrusion accommodation screw 144 is configured to have a pitch and a size corresponding to the spiral protrusion F ′ of the spiral reinforcing bar F, and is configured to be screwed to the spiral protrusion F ′, and has the same pitch and size as the reinforcing bar coupling screw 126. .

  Further, the protrusion accommodating screw 144 is formed at a predetermined ratio with respect to the entire length of the restraining tool 140, and a female screw 142 is formed at other lengths.

  The female screw 142 is configured to be screwed into the male screw 125 formed in the inclined portion 124, and is formed to be inclined so as to correspond to the inclined portion 124.

  In other words, the restraining tool 140 has an inner diameter that gradually decreases from one end to the predetermined depth, and a female screw 142 is formed there.

  The female screw 142 is configured to have a pitch and a size corresponding to the male screw 125 by applying a sawtooth screw similarly to the male screw 125.

  Therefore, the restraining tool 140 can be coupled to the support tool 120 by screwing the female screw 142 and the male screw 125, and can be coupled to the spiral reinforcing bar F by screwing the projection housing screw 144 and the spiral projection F ′.

  Hereinafter, a process of connecting a pair of reinforcing bars using the reinforcing bar connector 100 configured as described above will be described with reference to FIGS.

  First, FIG. 7 is a longitudinal sectional view showing a state before the reinforcing bar connection of the reinforcing bar connector 100 for a helical reinforcing bar according to the present invention, and the support tool 120 and the pair of restraining tools 140 are coupled as shown in FIG. A pair of helical rebars F that are prepared in a temporarily fastened state and are to be connected are also prepared.

  After that, as shown in FIG. 8, the reinforcing bar connector 100 is arranged on the outer surface of one spiral reinforcing bar F.

  That is, the reinforcing bar connector 100 is rotated and screwed into the spiral protrusion F ′. Here, the spiral protrusion F ′ is sequentially screwed into the protrusion accommodating screw 144 of the restraining tool 140, the reinforcing bar coupling screw 126 of the support tool 120, and the protrusion accommodating screw 144 of the restraining tool 140, resulting in the state of FIG. 8.

  FIG. 8 is a longitudinal sectional view showing a state in which a reinforcing bar is inserted into the reinforcing bar connector 100 for a spiral reinforcing bar according to the present invention.

  Then, as shown in FIG. 9, a pair of helical rebar F is faced | matched and arrange | positioned on the same straight line, and then the reinforcing bar connector 100 is rotated and transferred in the direction of the arrow.

  FIG. 9 is a longitudinal cross-sectional view showing a state before coupling with another reinforcing bar of the reinforcing bar connector 100 for spiral reinforcing bars according to the present invention.

  When these processes are completed, as shown in FIG. 10, the ends of the pair of spiral reinforcing bars F are positioned inside the reinforcing bar connector 100, and the positions of the ends of the spiral reinforcing bars F are externally moved by the inspection holes 122. It can be confirmed with the naked eye.

  However, in the state of FIG. 10, the reinforcing bar connector 100 may cause a minute movement of the pair of reinforcing bars.

  That is, FIG. 10 is a longitudinal sectional view showing a state in which a pair of reinforcing bars is temporarily assembled using the reinforcing bar coupler 100 for spiral reinforcing bars according to the present invention. As shown in the enlarged view of FIG. Even in the state of being inserted into the tool 100, the protrusion receiving screw 144 and the reinforcing bar coupling screw 126 are not in a state of applying pressure to the helical protrusion F ′, so that play can occur in the helical reinforcing bar F.

  Therefore, as shown by the arrow in FIG. 10, the projection housing screw 144 and the reinforcing bar coupling screw 126 are forced to apply pressure to the spiral projection F ′ by rotating and tightening the pair of restraints 140 in different directions. Can do.

  FIG. 11 is a longitudinal sectional view showing a contact state with the outer surface of the reinforcing bar when the pair of reinforcing bars are connected by using the reinforcing bar connecting tool for helical rebar according to the present invention. In the state shown in FIG. Since the pair of spiral reinforcing bars F rotate in the direction and move away from the support member 120, the pair of spiral reinforcing bars F are pulled by the restraining tool 140 as shown in the enlarged view below due to the interference between the spiral protrusion F ′ and the protrusion receiving screw 144. Receive.

  At the same time, the spiral protrusions F ′ of the pair of helical rebars F located inside the support tool 120 receive a compressive force from the support tool 120 as shown in the enlarged view above due to the interference of the reinforcing bar coupling screw 126.

  In such an operation, the spiral protrusion F ′ simultaneously contacts the protrusion receiving screw 144 and the reinforcing bar connecting screw 126, and at the same time, the support tool 120 and the restraining tool 140 are screwed together, so that the size of the protrusion receiving screw 144 and the reinforcing bar connecting screw 126 is increased. This is because is formed larger than the size of the spiral protrusion F ′.

  The present invention is not limited to the above-described embodiment, and various modifications based on the present invention can be made by a person skilled in the art within the technical scope described above.

  For example, in the embodiment of the present invention, the female screw 142 and the male screw 125 are configured to be formed on the inclined surfaces of the support tool 120 and the restraining tool 140, but have a corresponding pitch and size. Needless to say, it may be formed on the inner / outer peripheral surface formed with a step as long as it can be screwed.

  Further, in the embodiment of the present invention, the method of finally coupling the support tool 120 and the restraining tool 140 in the direction away from each other has been described with reference to FIG. 11, but it is assumed that the support tool 120 and the restraining tool 140 are rotated in the direction approaching each other. However, it goes without saying that the outer surface of each of the pair of spiral reinforcing bars F can be firmly connected in a state where a tensile force and a compressive force are simultaneously generated.

  The reinforcing bar coupler for a helical reinforcing bar according to the present invention accommodates a pair of helical reinforcing bars in a temporarily assembled state, and acts to supply compressive force and tensile force to the helical reinforcing bar at the time of complete assembly.

  Moreover, it can connect in the state which does not rotate a reinforcing bar.

  Therefore, the rebar connection work is simplified and management is facilitated, so that it can be used in a wide range of industrial sites.

  Further, when the reinforcing bar connection is completed, the shaking and the loosening are restricted, so that safety and reliability for the structure can be ensured.

  Not only that, it is possible to visually inspect the presence of misassembly by looking through the interior after connecting the reinforcing bars, so that anyone can perform an accurate and firm connection regardless of skill level, and the ripple effect is very Big.

Claims (6)

A support that houses a part of each of the pair of spiral reinforcing bars and is screwed into and supported by the spiral protrusions of the spiral reinforcing bars;
A part is inserted into and screwed into the support tool on both sides of the support tool, and the inside is composed of a pair of restraining tools that screw into the spiral protrusions and restrain the pair of spiral reinforcing bars,
The support tool and the restraining tool simultaneously supply a tensile force and a compressive force to each of a pair of spiral reinforcing bars, and the reinforcing bar connecting tool for spiral reinforcing bars.   The rebar connector for spiral reinforcing bars according to claim 1, wherein the pair of restraints have the same shape. On both sides of the support device, there are provided inclined portions formed by inclining male screws that are screwed into the restraint device,
The reinforcing bar connecting tool for a spiral reinforcing bar according to claim 2, wherein a reinforcing bar connecting screw having a pitch corresponding to the spiral protrusion is provided inside the support. The inner one side of the restraint is provided with a female screw having a pitch corresponding to the male screw, and a protrusion accommodating screw having a pitch corresponding to the spiral protrusion,
The said male screw and a female screw have a different pitch from a protrusion accommodation screw and a reinforcing bar coupling screw, The reinforcing bar connector for spiral reinforcing bars according to claim 3 characterized by things.   5. The reinforcing bar coupler for a spiral reinforcing bar according to claim 4, wherein a sawtooth screw is applied to the male screw and the female screw.   The spiral according to claim 5, wherein an inspection hole for confirming the position of a pair of spiral reinforcing bar ends inserted into the support from the outside is provided on one side of the support. Reinforcing bar connector for reinforcing bars.

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