JP3360006B2 - Wire rope terminal processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a wire rope terminal.

[0002]

2. Description of the Related Art Alloying is known as one of the methods for treating the end of a wire rope. In this alloy fastening method, the end portion of the wire rope is inserted into a tapered cylindrical socket, and the wire on the insertion side is loosened in a chasen shape and spread along the inner surface of the socket. In this method, a molten metal such as a zinc alloy is cast into a socket, and the molten metal is solidified to integrally connect the terminal of the wire rope and the socket.

[0003]

In a conventional general wire rope containing a cord, since the material of the cord is hemp fiber, the cord has sufficient heat resistance, and therefore a molten metal is cast. But there is no particular problem.

However, in recent years, wire ropes using synthetic fibers such as propylene as a material for the cord have been provided. In such a wire rope, the heat resistance temperature of the cord is low, and therefore, the alloy rope is fastened. The core rope at the mouth of the socket is melted by the heat of the molten metal when performing the heat treatment.

When the cord at the mouth of the socket melts,
When the wire rope is tensioned, the rope loses its shape at its mouth, causing disconnection and reducing reliability.
The present invention has been made in view of such a point, and an object of the present invention is to provide a wire capable of reliably preventing fusion of a synthetic fiber cord and achieving highly reliable terminal treatment. An object of the present invention is to provide a rope terminal processing method.

[0006]

According to the present invention, in order to achieve the above object, a terminal portion of a wire rope whose cord is made of a synthetic resin is inserted into a socket, and a wire of the wire rope at the insertion side is inserted. The wire is spread to form a chasen, and the part of the mandrel from a section L where the wire is loosened to a certain section L 'extending further to the middle side of the wire rope is cut and removed. The fixed section L '
The central portion of the rope is filled with a heat-resistant filling member and filled, and a section L where the wire is loosened is arranged in the socket. In this state, a molten metal is cast into the socket, and the metal is solidified to form a wire. It is characterized in that the rope and the socket are integrated.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the first embodiment of the present invention.
Is shown. Reference numeral 1 shown in the figure is a wire rope containing a cord. This wire rope 1 is obtained by twisting a plurality of strands 3, which are a stranded body of a plurality of wires 2, around the outer periphery of a cord 4, and the cord 4 is formed of a synthetic fiber such as polypropylene.

Reference numeral 5 denotes a steel socket for fastening the wire rope 1 to a predetermined portion. The socket 5 has a tapered cylindrical shape, and the opening on the small diameter side is an insertion port of the wire rope 1. It is 6.

The procedure for alloying the ends of the wire rope 1 will be described. First, the terminal portion of the wire rope 1 is inserted into the socket 5 from the insertion port 6. Then, the strands 3 on the insertion side are untwisted, and the wires 2 on each of the strands 3 are untwisted and loosened into individual wires 2, and these wires 2 are spread in a chasen shape.

[0010] After the wire 2 is loosened and spread in a chasen shape, the core cord 4 in the section L where the wire 2 is loosened is cut and removed. The length of the section L is about 4 to 5 times the diameter of the wire rope 1 as a guide.

When the mandrel 4 is cut and removed, the cut end surface of the mandrel 4 is exposed inside the unraveled portion of the wire 2, and a heat-resistant packing member such as glass wool is placed on the end surface. The packing member 7 covers the cut end surface of the cord 4 with the packing member 7.

After the completion of the pretreatment, the rope 1 is pulled back so that the section L where the wire 2 has been loosened is disposed along the tapered inner surface of the socket 5. The molten metal 8 is injected into the socket 5 from the opening and cast. As the metal for casting,
For example, a zinc-based alloy (99.99% Zn, melting point 460 ° C ± 10
° C), lead alloy (Pb80%, Sn5%, Sb15%, melting point)
350 ° C ± 10 ° C, copper-containing zinc (98% Zn, 2% Cu, melting point)
460 ° C ± 10 ° C).

The molten metal 8 cast into the socket 5 is solidified, and the solidification causes the terminal of the wire rope 1 to be integrally connected to the socket 5. Then, the terminal of the wire rope 1 can be fastened to a predetermined portion via the socket 5.

The cut end surface of the cord 4 disposed in the socket 5 is covered with a heat-resistant filling member 7, so that when the molten metal 8 is cast into the socket 5, the molten metal 8 There is no direct contact with the rope 4, so that the cord 4 is not melted by the heat of the molten metal 8 even if the material of the cord 4 is made of synthetic fiber having low heat resistance.

The first embodiment is an example applied to the terminal processing of a wire rope 1 having a relatively small diameter. Molten metal 8
In the large-diameter wire rope 1 where the amount of
It is not sufficient to cover the cut end face of the mandrel 4 with the filling member 7, and in this case, it is preferable to employ the following second embodiment.

In the case of the second embodiment, as shown in FIG. 2, the wire 2 at the terminal portion of the wire rope 1 inserted into the socket 5 is loosened and spread in a chasen shape. Then, the cord 4 at a portion extending from the section L where the wire 2 is loosened to a certain section L 'extending to the intermediate side of the wire rope 1 is cut and removed, and the fixed section L' which is vacated by the removal is removed. A heat-resistant packing member 7 is packed in the center of the rope. The length of the section L is 4 to 5 times the diameter of the wire rope 1, and the section L '
Is about 3 to 5 times the diameter of the wire rope 1 as a guide.

When the cord 4 is cut, the wire rope 1 is inserted into the socket 5 with a sufficient length, and its terminal portion is largely protruded to the opposite side of the insertion port 6. Then, the strand 3 in the portion extending from the section L to L 'of the wire rope 1 is untwisted, and the core rope 4 in the full length section (L + L')
Is exposed, cut and removed. After this cutting and removing, the strands 3 in the section L 'are twisted again to form a rope structure, and the wires 2 of each strand 3 in the section L are loosened and spread in a chasen shape, and the core cord 4 is cut off. Then, the packing member 7 is packed into the center of the rope in the section L 'that has become empty.

Thereafter, the wire rope 1 is pulled back and the portion of the section L where the wire 2 has been loosened is arranged in the socket 5. In this state, a molten metal 8 is cast into the socket 5, and the metal 8 is solidified. The rope 1 and the socket 5 are integrated.

In this case, the core 4 of the wire rope 1 and the molten metal 8 in the socket 5 are largely separated by the packing member 7, so that the molten metal 8 cast into the socket 5 is formed.
Even if a large amount of iron is used, the molten metal 8
The conduction of heat to the cord 4 is reliably suppressed, and the melting of the cord 4 is reliably prevented.

[0020]

As described above, according to the present invention,
The molten metal cast in the socket and the core of the wire rope are cut off by a heat-resistant packing member, and heat conduction from the molten metal to the core can be reliably suppressed,
Therefore, it is possible to prevent the cord from being melted and achieve highly reliable terminal processing.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wire rope 2 ... Wire 3 ... Strand 4 ... Core cord 5 ... Socket 6 ... Slot 7 ... Packing member 8 ... Molten metal

Claims (1)

(57) [Claims] An end portion of a wire rope whose core cord is made of a synthetic resin is inserted into a socket, and the wire of the wire rope on the insertion side is loosened and spread in a chasen shape, and the wire is unraveled from a section L. Further, the core rope in a portion extending over the predetermined section L 'extending to the middle side of the wire rope is cut and removed, and the rope center portion of the portion of the predetermined section L' which has become empty by this removal is filled with heat resistance. A section L in which the members are packed and filled and the wire is loosened is arranged in the socket, and in this state, a molten metal is cast into the socket, and the wire rope and the socket are integrated by solidifying the metal. Wire rope termination method.