KR20110110385A

KR20110110385A - A fastener for steel bars

Info

Publication number: KR20110110385A
Application number: KR1020100029659A
Authority: KR
Inventors: 김태형
Original assignee: 주식회사극동이앤씨
Priority date: 2010-04-01
Filing date: 2010-04-01
Publication date: 2011-10-07

Abstract

The present invention relates to a bi-directional reinforcing bar fastening, constitutes a tubular reinforcing bar (F) for fastening, extending and fixing a plurality of reinforcing bars (S1, S2) of the building structure, the reinforcing bar (F) Is; A cross-sectional polygon having integrally formed inlet pipe portions 1, 10 as part of a tubular body projecting to both sides in a straight line, and integrally formed at the center of the bundled inlet pipe portions 1, 10 and having nut angle portions 21 at the outer periphery thereof. A fastening nut head 20 having a fastening portion 25 formed therein, wherein the reinforcing rods S1 and S2 end threaded portions T1 and T2 are provided in the inward entry portion of the pipe portion of the fastening inlet pipe portions 1 and 10; Binding for threading the guide taper surfaces 2 and 12 for the entry guidance and the threaded portions T1 and T2 of the reinforcing bars S1 and S2 to the end faces on which the guide taper surfaces 2 and 12 terminate. The screw portions 3 and 13 are formed as internal threads.

Description

Bidirectional Reinforcing Bars {A FASTENER FOR STEEL BARS}

The present invention relates to a bidirectional reinforcing bar fastener, and more particularly, to a reinforcing bar fastener (Fastener) of the configuration for extending and binding the reinforcing bar as the frame extension required for the construction of the structure at the construction site.

Reinforcing bars widely used for the formation of the skeleton of the structure at the construction site are usually manufactured as rod-shaped body, cut into standard lengths such as 5m and 10m and supplied at steel and steel mills, and at the construction site, the rebar is extended according to the length of the structure. It is fixed and used.

For example, extending the length by adding another reinforcing bar to the exposed end of the concrete-reinforced reinforcing bar has become a very important and basic reinforcing bar in the building.

Conventionally, in the bidirectional binding between such rebars, a method of fixing reinforcing bars using wires, or performing welding to fix rebars, or a method of fixing reinforcing bars using a separate fastening tool is used.

In the conventional method described above, the method of using the wire for connection requires a great deal of labor of the worker, which lowers the productivity, lowers the binding strength, and does not guarantee the straightness between the bars, which is not suitable for precision construction.

In addition, in the case of welding, butt welding is not easy, and welding alone does not provide sufficient fixed strength to the vertically disposed rebar, and an additional expensive jig is required to keep the rebar vertical for welding.

In view of the above problems, a binding tool capable of binding with high strength binding and simple fastening has been widely conceived and used in the past.

Such an exemplary configuration is disclosed in Korean Patent No. 10-0411242, Korean Utility Model No. 20-0296021, and the like as a source.

In particular, the configuration of Korean Patent No. 10-0411242 discloses a cap configuration for inserting reinforcing bars at both ends and screwing by hand, as shown in FIG. As an improved configuration for the present invention, as shown in FIG.

However, the above-mentioned configuration of using the nut-shaped piece and the cap coupling hole of the source is preferable to increase the binding strength, but by using a plurality of members, there is a problem that it is practically applied in the construction site with a lot of corrosion and manual work. Over time due to corrosion of components and wear of parts, and the biggest problem is that the unit cost of production is very high, and the cost of construction is greatly increased when it is employed in construction sites where a large number of fasteners are required. Recruitment was virtually impossible on sites where construction costs were very important and could be selectively used only for expensive constructions.

As a practical site configuration, the cap configuration of FIG. 5, which is assembled by bidirectional screwing and rotated by hand, which is cited in the above known technology, has advantages in reliability and cost in operation.

However, the configuration of Figure 5 of the cap configuration provided as a prior art in Korea Patent 10-0411242, in spite of the advantage that it can be produced inexpensively simply by forging, etc. to match the reinforcing bar of the heavy rod-shaped body to the inlet portion of both ends It is extremely difficult to screw in by inserting and rotating, and the friction force between the thread formed on both ends of the rebar and the thread inside the cap is too large to turn and turn by hand, so the rotation is limited and casting, forging when held as a separate tool Shear force is applied to the tubular body of the sieve, causing a problem such as cracking in the cap body.

In the present invention, as invented to solve the above problems, it constitutes a tubular reinforcing bar fastening for fastening, extending, fixing a plurality of reinforcement of the building structure, the reinforcing bar is protruding on both sides in a straight line A binding inlet pipe part as a part of the tubular body, and a fastening nut head formed integrally in the center of the binding inlet pipe part and formed in the outer periphery of the polygonal cross-section having a nut angle part, and inside the pipe part of the binding inlet pipe part. A guide taper surface for guiding the reinforcing thread portion of the reinforcing thread portion and an end surface of the reinforcing threaded portion of the reinforcing rod portion threaded thread formed on the inner surface of the reinforcing rod portion; The diameter of the fastening nut head of the sphere is larger than the diameter of the fastening inlet pipe and fastened with a spanner. Characterized by increasing the rotational torque on, and a simple structure, yet it is possible to achieve that purpose, the reliability of the bond strength nopeumyeonseo can contribute to cost reduction.

The bidirectional reinforcing bar fastener of the present invention is designed by changing the cap configuration of the bidirectional screw coupling disclosed in the prior art as described above to improve the configuration problems, extremely simple, high reliability of the bonding strength, low production cost and easy fastening Has the effect of providing a reinforcing bar fastener of the configuration.

1 is a perspective view of a bidirectional reinforcing bar fastening of the present invention.
Figure 2 is a cross-sectional view taken along line A-A of Figure 1 which is a bidirectional reinforcing bar binding sphere of the present invention.
Figure 3 is a perspective view for explaining the use of the bi-directional reinforcing bar fastening of the present invention.
4 is a perspective view of a reinforcing bar of an exemplary configuration of a conventional sailor.
5 is a perspective view of the reinforcing bar fastening as a configuration in which the reinforcing bar fastening of the configuration of FIG. 4 is improved in the conventional source.

Hereinafter, with reference to the accompanying drawings will be described a preferred configuration and operation of the present invention for achieving the above object.

1 is a perspective view of a bi-directional reinforcing bar of the present invention, Figure 2 is a cross-sectional view taken along line A-A of Figure 1 which is a bi-directional reinforcing bar of the present invention, Figure 3 is a perspective view for explaining the use of the bi-directional reinforcing bar of the present invention Explain together.

Bi-directional reinforcing bar (F) of the present invention as shown in Figure 1 is a fastening nut head (20) that is formed by a binding method such as forging integrally piped portion (1,10) as a tubular body protruding at both ends and integrally therebetween. Has Reinforcing bar (F) is a low carbon high carbon steel of about 400C is formed by forging, and the high carbon steel is a material widely used in the past because of its excellent affinity with concrete and low cost.

As shown in the figure, the fastening nut head 20 has a fastening part 25 such as a hexagonal cross section having a nut angle part 21 so as to enable rotational fastening as a tool such as a spanner on the outer circumference.

As shown, the binding inlet pipes 1 and 10 are tubular bodies protruding at both ends, and the inner side of the pipe easily enters the threaded portions T1 and T2 at the ends of the reinforcing bars S1 and S2 at the inlet. Guide taper surfaces 2 and 12 for guiding and entering the threaded side are formed.

The tapered angles a will be determined experimentally on the guide taper surfaces 2 and 12, but it is preferred that the guide taper surfaces 2 and 12 be about 10 to 30 degrees.

On the end face at which the guide taper surfaces 2 and 12 are terminated, the binding screw portions 3 and 13 for threading engagement with the threaded portions T1 and T2 of the reinforcing bars S1 and S2 are machined as internal thread, and the internal thread is engaged. It is evident from the following effects that the threads 3, 13 are threaded in opposite directions.

In the above description, it is preferable that the binding inlet pipes 1, 10 and the fastening nut head 20 as a tubular body forming the reinforcing bar fastening body F as one body are integrally molded as forging, and the diameter of the fastening nut head 20 ( D) increases the torque at the time of tightening with a tool such as a spanner by making it larger than the diameter d of the binding inlet pipe parts 1 and 10.

The diameter d of the binding entry pipe parts 1 and 10 may be variously manufactured to fix the reinforcing bars 16, 19, 22, 25, 29, 32, and 35 mm in diameter depending on the structure and purpose of the building used. .

According to the above configuration, the entire reinforcing bar fastening unit F rotates the binding inlet pipes 1 and 10 at both ends simultaneously with only one rotation of the fastening nut head 20 with respect to the reinforcing bars S1 and S2. The length of the operating arm (A) between the center of rotation (G) of the nut head (20) and the center of action (c) of the force of the binding inlet pipes (1, 10) is minimized to 1/2 so that the torsion moment (Mt) Is minimized.

Therefore, the threaded coupling of the reinforcing bars (S1, S2) at both ends is easy by only one rotation of the fastening nut head (20) of the reinforcing bar (F), and fastening is possible even with a small force. It becomes possible.

The use of the bidirectional reinforcing bar fastener F of the present invention having the above-described configuration will be described.

Rebar binding holes F are rotated by hand several times with respect to the threaded portion T1 of the end portion of the reinforcing bar S1 embedded on the working surface G by concrete casting, etc. When the end of the reinforcing bar S2 is retracted (in this case, another worker can lift the reinforcing bar S2 and guide the reinforcement), the threaded portion T2 of the free end of the reinforcing bar S2 is

The guide thread is guided by the inclined surface of the guide taper surface 12 of the other binding inlet pipe part 10, and the end screw thread of the thread part T2 is coupled with the binding screw part 13,

In this state, the operator simply binds the fastening nut head 20 of the reinforcing bar F by hand several times, and then firmly tightens it with a spanner.

In this work, the reinforcement of the reinforcing bars (S1, S2) to the reinforcing bar (F) is made very easily, and the threaded portions of the reinforcing bars (S1, S2) at both ends only by applying a small force to the fastening nut head 20 at the time of fastening. Tightening between (T1, T2) and the binding screw parts (3, 13) of the reinforcing bar (F) is made, and this configuration proves that the tensile and compressive strength by the fastening required by the building code is guaranteed. lost.

Moreover, since the reinforcing bar F itself itself functions as a cap covering the threaded portions T1 and T2 at the ends of the reinforcing bars S1 and S2, the effect of preventing corrosion due to infiltration of rainwater can be obtained.

1,10: Binding Inlet
20: tightening nut head
F: Reinforcing Bar
S1, S2: Rebar

Claims

Constitution of the tubular reinforcing bars (F) for fastening, extending and fixing a plurality of rebar (S1, S2) of the building structure, the reinforcing bar (F);
Binding inlet pipes (1, 10) as part of a tubular body protruding in a straight line on both sides;
Has a fastening nut head (20) formed integrally molded in the center of the binding inlet pipe (1, 10) and the fastening portion 25 of the cross-sectional polygon having a nut angle portion 21 at the outer peripheral edge thereof,
Guide taper surfaces 2 and 12 for guiding the entry of the threaded portions T1 and T2 of the reinforcing bars S1 and S2 to the inner entry portion of the pipe portion 1 and 10 of the binding inlet pipe 1 and 10,
On the end surface where the guide taper surfaces 2 and 12 are terminated, binding screw portions 3 and 13 for threaded engagement with the threaded portions T1 and T2 of the reinforcing bars S1 and S2 are formed as internal threads,
The diameter (D) of the fastening nut head 20 of the reinforcing bar fastening (F) is larger than the diameter (d) of the fastening inlet pipe (1, 10) characterized in that to increase the rotational torque when tightening with a spanner Bi-directional reinforcing bars.

The method of claim 1,
The binding screw portion (3, 13) is a bidirectional reinforcing bar fastening, characterized in that the thread can be formed for screwing in the opposite direction.