KR900007120B1 - Tie cable and manufacturing process therefor - Google Patents

Abstract

Tie cable for construction, is made of a sleeve with spiral grooves, fastened with both ends of PC steel wire cable. Fastening tool (5) having slip sleeve (6) with spiral groove (7), is connected with exposed surface of drawing PC wire coated by polyethylene layer (2). Separation of the inner PC wire from the outer one is premented.

Description

Tie cable and processing method

1 is a manufacturing process diagram according to the present invention.

2 is a perspective view of one side of a tie cable according to the present invention;

3 is a side perspective view of a conventional tie cable.

* Explanation of symbols for main parts of the drawings

2: polyethylene layer 4: closed surface

5: fastener 6: sleeve

A: Outer PC steel wire B: Inner PC steel wire

L ₁ : Length part L ₂ : Length part

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tie cable made by compressing a sleeve having a threaded thread at both ends of a plurality of PC steel wire cables that can be widely used for civil engineering and construction. This is to prevent the developer from being released.

Conventionally, tie cables have been used in France, Japan, etc. for civil construction, and if you look at the structure of them in detail, a multi-strand PC is disclosed in a patent publication (Patent Application Publication 50-14810) issued by the Japanese Patent Court. Apply synthetic resin layer such as poly ethylene to the outer circumference of the steel wire, but leave a certain length part at both ends and squeeze them into the steel pipe (sleeve) and form a screw thread on the outer circumference to provide excellent corrosion resistance and long life. It is possible to obtain a high tensile force by this fine PC strong acid, and to be lighter than the conventional method using a tie rod, and to be flexible and easy to carry and install. .

However, when the state of the tie of the conventional tie cable is connected to a plurality of PC steel wires, the PC steel wire is a very high strength, the shrinkage of the rib when pressed at a very high pressure in order to adhere the ribs on both ends of the PC steel wire table As the inner circumferential surface is infiltrated evenly between the outer PC steel wires and is bound, the inner PC steel wires are in point contact with the outer PC steel wires and eventually the rib is fixed to the outer PC steel wires. The inner PC steel wire is in an unstable binding state with the outer PC steel wire.

Therefore, when the conventional tie cable is used for a long time after installation, the inner PC steel wires and the outer PC steel wires which are in point contact by the vibration or shooting force received from the outside are released, so that the tensile force of the tie cable is There was a problem that the tensile strength by the PC wires on the right side except the PC wires was reduced, so that the tensile force could not be obtained in proportion to the number of PC wires used. Therefore, if the plug is inserted into the plug, there is a problem such as requiring a cumbersome work process that requires a separate processing of the inner circumferential surface of the high-strength and bulky rib.

The present invention allows the inner and outer PC steel wires to be firmly bound to each other and to completely block the PC steel wires to the outside to obtain a tie cable and a processing method thereof, which can eliminate the problems of the conventional tie cable. It is intended to be described in detail according to the accompanying drawings as follows. Figure 1 shows the manufacturing process of the tie cable according to the present invention by forming a poly ethylene layer (2) on the outer periphery of a plurality of PC steel wire table (1) by a known wire coating method or performing a zinc coating (3) The length portion L ₁ is exposed, and the outer PC steel wire A of the length portion L ₁ is cut so that the inner PC steel wire B is exposed to the length portion L2 and then the outer PC. Inserting the fastener 5 formed by forming a closed surface 4 having an outer diameter smaller than or equal to the diameter of the steel wire A and inserting the fastener 5 by means of cold rolling, forging or extrusion through a die, or the like. ) Is contracted and fixed to both ends of the inner PC steel wire (B), and then inserts a rib 6 made of alloy steel or mechanical structure carbon steel, etc. in the length portion (L _l ), followed by cold rolling, extrusion or drawing through forging or dies. Pressing in such a way as to shrink the inner peripheral surface of the rib (6) It penetrates into the bent groove of the side PC steel wire A and is fixed, and is pressed and fixed to the outer circumferential surface of the binding port 5 fixed to the inner PC steel wire B, and then the screw line 7 is attached to the outer circumferential surface of the rib 6. Forming will be able to obtain a tie cable according to the present invention. This tie cable is a state in which the binding port 5 which binds the outer PC steel wire A and the inner PC steel wire B to the inner circumferential surface of the sleeve 6 is completely fixed. 6) and the fastener 5, the outer PC steel wire (A) and the inner PC steel wire (B) are both firmly fixed, so the outer and inner PC steel wires (A), (B) are integrated and eventually tie The tension of the cable is increased in proportion to the number of all PC wires inside and outside.

Therefore, the tension force is not lowered due to the glass phenomenon of the inner and outer side PC steel wires as the vibration and the impact is applied for a long time like the conventional tie cable, and the binding hole 5 is the rib 6 and the In addition, since both ends of the tie cable can completely serve as a waterproof plug by completely blocking the outside air, the preparation and installation of a separate material for waterproofing becomes unnecessary.

EXAMPLE

19 PC steel wires of 30m length having a diameter of 12.7mm are stranded and the polyethylene layer 2 is formed on the outer circumferential surface thereof to have a thickness of 2.5mm, ) Is cut with a knife or stripper so that the length part Ll exposed to the 12 outer PC wires A is formed at about 400mm, and then the outer PC wires at both ends of the lined length part L _l (). Cutting the A) to expose the seven inner PC steel wires (B), but the exposed length portion (L ₂ ) to about 180mm and then to the binding hole having a closed surface (4) made of mechanical structural steel, such as SM-C (5) is inserted and the inner circumferential surface of the binding port 5 penetrates into the bent groove of the inner CP steel wire B by a method of Ro1ler or press cold rolling forging or extrusion or drawing through a die. then the length portion (l _l) to Insert the sleeve 6 of the cylindrical alloy steel (SCM), cold-rolling The inner circumferential surface of the sleeve 6 is formed on the outer circumferential surface of the binding port 5 while allowing the inner surface of the rib 6 to penetrate into the bent groove of the outer PC steel wire A by the method of extrusion or drawing through a die or by drawing. When the screw 7 is formed on the outer circumferential surface of the rib 6 after being compressed, the tie cable according to the present invention is completed. A well-known tie cable made of the same diameter and the same number of PC steel wires is tensioned. As a result of the test, 7 inner PC steel wires (B) and 12 outer PC steel wires (A) were released, which reduced the tensile load, resulting in only 169.2 t. However, the tie cable according to the present invention has outer and inner PC steel wires (A), ( B) is integrated by the sleeve 6 and the fastener 5, so that the tensile load of the 19 PC steel wires can be obtained almost as it is, and the tensile load is 36.84% higher than the conventional one, reaching 267.9 tons after civil engineering. Excellent as tensile material for construction Gatge will be the performance.

As described above, the tie cable according to the present invention has a superior tensile load than the known one, so that the number of uses can be reduced, thereby reducing the construction cost, and even though the tensile load is considerable, its own load is 444 kg. Since it is only lightweight, no additional support for tie cable is required, further reducing the construction cost. Moreover, both ends of the tie cable according to the present invention guarantee perfect waterproofing by the closing surface 4 of the binding port 5. The longevity is long.

Claims (2)

A plurality of PC steel wires are stranded and a polyetchene layer 2 is applied to the outer circumference thereof, but both ends of the length part Ll exposed to the outer PC steel wire A on both sides of the PC steel wire are cut to different length parts L2. Tie cable to expose the inner PC steel wire (B) and to fix the fastener (5) having a closed surface (4), and to crimp the sleeve (6) in which the spiral (7) is formed. The inner PC is covered by speaking a plurality of PC wires and covering the polyethylene layer 2 by a known wire coating method, but cutting both ends of the length part Ll exposing the outer PC wire A on both sides of the PC wire. After the steel wire B is exposed, the fastener 5 having a closed surface 4 is inserted therein, and the inner surface of the fastener 5 is pressed into the inner PC steel wire ( B) penetrates into the bent groove of B) and is fixed to it, and the sleeve 6 is inserted into the bent groove of the outer PC steel wire A by inserting the sleeve 6 and pressing it by cold drawing forging or extrusion drawing by a die. A method of processing a tie cable in which a thread (7) is formed on the outer circumferential surface of the sleeve (6) so as to penetrate and fix and at the same time to be pressed against the outer circumferential surface of the binding port (5).

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