JP3003831U - Wire rope - Google Patents

Abstract

(57) [Summary] [Purpose] It is intended to provide a wire rope excellent in strength by eliminating the fact that the core wire of each strand is cut prior to the wire around the core wire. [Structure] A wire rope obtained by arranging a child lasso core material and a plurality of child lasso twisting materials around the child lasso core material, wherein the child lasso core material and the child lasso twisting material are
It is composed of a strand formed by twisting a plurality of strands around a corrugated core wire.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire rope used for various purposes.

[0002]

[Prior art]

 A wire rope is formed by twisting multiple strands of wire to form a strand (strand), and multiple strands of this strand are twisted together. There is one in which a plurality of strands are twisted around the outer periphery of a core material. In the case of this type of wire rope, a straight element wire, which has a predetermined diameter in advance by a wire drawing process, has been generally used as a core wire of each lasso.

[0003]

[Problems to be solved by the device]

 However, in such a conventional wire rope, while the core wire is composed of straight strands as described above, a plurality of strands twisted around the outer periphery of the strand are spiral, and therefore, the wires are The amount of extension within the elastic limit of the core wire is too small compared with the amount of extension within the elastic limit of the wire, and when a tensile load of a specified value or more is applied to the wire rope, There was a problem I needed when I disconnected.

The present invention was devised in view of the above points, and an object thereof is to cut the core wire of each child lasso before cutting the wire around the core wire. The purpose is to provide a wire rope that is excellent in strength and strength.

[0005]

[Means for solving the problem]

 Therefore, the present invention has the following configuration in order to achieve the above object. That is, in a wire rope obtained by arranging a child lasso core material and a plurality of child lasso twisting materials around the child lasso core material, the child lasso core material and the child lasso twisting material are It is composed of a strand formed by twisting a plurality of strands around a corrugated core wire.

[0006]

[Action]

 With the above configuration, since the core wire of the child lasso core material and the child lasso twisted material is formed into a corrugated shape for absorbing the difference in expansion, when the tensile load is applied to the wire rope, the wire for absorbing the difference in elongation is applied. There is an extension margin in which each core wire of the corrugation becomes a straight line, and the core wire also expands along with the elongation of each strand of the wire, and absorbs the difference in expansion that occurs between the core wire and the surrounding wires. This makes it possible to prevent a situation in which the core wire breaks before the surrounding wires, and as a result, the mutual shape retention of the plurality of wires around the core wire, which is maintained by the core wire, collapses. This can be prevented in advance, and the load can be transmitted to the strands and the core wire almost uniformly at all times, so that it is possible to prevent the strength of the rope itself from being reduced or cut due to the breakage of the core wire.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, reference numeral 1 denotes a child lasso core material, and reference numeral 2 denotes a plurality of child lasso twisted materials which are arranged around the child lasso core material 1 and are twisted together with the core material 1.

The above-mentioned strand wire core material 1 and strand wire strand material 2 are composed of a strand of strands around a corrugated core wire 3 and a plurality of strands 4 arranged around the core wire 3. . That is, each of the strands forming the core material 1 and the strand strand 2 is a core wire 3 made of one steel wire (strand) and the same steel wire (strand) twisted around the outer periphery of the core wire 3. It is composed of a plurality of strands 4 ...

In this case, the so-called Z-twist is adopted as the twisting method for each strand, but in this embodiment, the S-twist may be used. Further, in the illustrated example, the core wire 3 and the strands 4 ... 4 are made of steel wires of the same thickness, but the diameter of the core wire 3 at the center is the diameter of the strands 4 ... 4. It is preferably slightly thicker, but may be thinner.

In the wire rope 1, each core wire 3 is formed in a corrugated shape as described above. That is, the waveform of the core wire 3 is obtained by meshing gears composed of chevron teeth with each other, and inserting a straight steel wire between the meshing gears to form a two-dimensional waveform at a relatively fine pitch. As shown in FIG. 2, when the core material 1 and each of the strands of strands 2 are unraveled, the core wire 3 at the center is formed into a corrugated shape, and the outer periphery of the core wire 3 at the center is further formed. The six strands of wire 4 ... 4 are twisted around each other.

According to such a configuration, since the six strands of strands 2 are helically twisted around the core 1 located at the center of the wire rope 1, the rope 1 can be pulled by the rope 1. When a load is applied, the strand twist material 2 expands along the pulling direction while reducing its spiral diameter.

In this case, if the center core material 1 and the core wire 3 of the child strand twist material 2 are made of straight steel wire, the core material 1 and the child strand twist material 2 are twisted. The strands 4 ... 4 are slightly stretched and then broken as the strands grow. However, in the wire rope 1 having the above-described configuration, the core wire 1 at the center and the core wire 3 of the strand cord 2 are corrugated. When the tensile load is applied, the central core wire 1 also extends in the pulling direction from a wavy shape to a straight line when a tensile load is applied.

As a result, it is possible to prevent the conventional situation where the central core wire is broken before the surrounding wires, and a wire rope with better tensile strength characteristics than before is realized. You will be able to do it.

The helix of the strands of twisted strand 2 in this embodiment may be right-handed (S twist) or left-handed (Z twist). Further, the corrugated shape of the center core wire 1 may be spiral or may be a combination of spiral and corrugated.

[0015]

[Effect of device]

 As is apparent from the above description, according to the wire rope of the present invention, the shape of the core wire of the core material 1 and the strands of twisted rope 2 that form the wire rope is corrugated or spiral so as to have an expansion allowance. By improving the shape, the rope itself will not be easily cut due to the cutting of the core wire, it will be several times to several tens times stronger than the conventional one, and it will be effective in obtaining a large tensile strength. I arrived. Further, even when a large load acts on the wire rope of the present invention and the surrounding strands are stretched, the core wire of the central corrugation can be stretched together with this strand to secure a sufficient expansion allowance, and the core wire and the strand can work together. And can receive a large load. Therefore, it has become possible to provide a wire rope for heavy loads that is resistant to fatigue and is not easily cut.

[Brief description of drawings]

FIG. 1 is a partial front view of a wire rope.

FIG. 2 is a cross-sectional view of a wire rope.

FIG. 3 is a perspective view showing a state in which a tip portion of a core material or a strand of twisted strand material is unraveled.

[Explanation of symbols]

 1 Wool core material 2 Wool strand material 3 Core wire 4 Elementary wire

Claims (1)

[Scope of utility model registration request] 1. A wire rope obtained by twisting a child lasso core material and a plurality of child lasso twisting materials around the child lasso core material, wherein the child lasso core material and the child lasso twisting material are provided. However, the wire rope is characterized in that it is composed of a strand formed by twisting a plurality of strands around the corrugated core wire.