JP2524323Y2 - Wire rope - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a general-purpose rope with high cutting load, high flexibility and long life, and is used for fishing, forestry, sling, etc. As a suitable wire rope.

(Prior Art) A conventional wire rope is formed in the same manner as a strand formed by twisting seven wires, and a six-strand, six-strand (6 × 7 structure) in which six strands are twisted around a rope fiber core. 12 stranded 6 strands (6x12 structure), 19 stranded 6
JIS standard products such as twisting (6 × 19 structure) and 24-strand 6-twisting (6 × 24 structure) are widely used and common.

In particular, the wire rope having the 6 × 24 structure is obtained by twisting 12 wires 12 around a fiber core 11 as shown in FIGS. Are twisted to different pitches (see FIG. 3B), and as a strand 14 having an outer layer, a structure in which six strands 14 are twisted around a rope fiber core 15 to provide a high cutting load property. Although it is widely used as a sling or the like, the outer and inner wires 12 and the outer wires 13 are in point contact with each other, causing localized concentrated stress to reduce flexibility, life, and the like. After twisting the wire 12 of the inner layer around
Since the outer layer of wire 13 is twisted, the twist and tightening of each layer are likely to vary, and the linearity and rotation of the strand are impaired. The roundness and the like of the rope are impaired, and the linearity, the roundness and the rotation of the rope are adversely affected.

(Problem to be Solved by the Invention) The conventional 24-wire, 6-strand (6 × 24 structure) wire rope is characterized by high cutting load characteristics and the like, and is widely used for slings and the like. However, there is a problem in flexibility, life and quality.

The present invention has been developed in view of the above-described circumstances, and the object thereof is to provide a wire having a high cutting load characteristic as a general-purpose rope, and having improved flexibility, service life and quality. In providing ropes.

(Means for Solving the Problems) The present invention provides 14 to 17 outer layer wires set to a wire diameter corresponding to the rope diameter and the like, and the same number of inner layers set to a smaller diameter corresponding to the outer layer wire. The wire is divided into an inner layer and an outer layer around the fiber core, and is stranded in a sealed configuration in which the wires are twisted in the same twisting direction in a similar pitch with a similar pitch. Six to eight of the strands are wrapped around the rope fiber core. It is a twisted wire rope, has high cutting load characteristics, and has improved flexibility, life, and quality.

(Example) FIGS. 1 (A), 1 (B), and 1 (C) show a first embodiment of the present invention, in which 1 is a fiber core of a natural fiber or a synthetic fiber.
2 is a wire having a relatively small diameter forming the inner layer of the strand 4, 3 is a wire forming the outer layer of the strand 4, and 5 is a rope fiber core of a natural fiber or a synthetic fiber, and has a wire diameter corresponding to the rope diameter or the like. 14 to 17 outer-layer wires 3 and the same number of inner-layer wires 2 set to a small diameter corresponding to the wires 3 are divided into an inner layer and an outer layer around the fiber core 1 in the same twisting direction. A strand 4 having a seal configuration in which the strands are twisted in a line contact state with a fine pitch is formed into a wire rope in which six strands 4 are twisted around a rope core 5.

More specifically, the wire rope of the present invention basically specifies a rope structure and a rope diameter based on a well-known design and manufacturing process in accordance with a usage mode of a user and a required breaking load. (C) calculating and dividing the strand diameter in accordance with the rope diameter, and (b) calculating and dividing the wire diameter in consideration of the number of wires in the outer layer corresponding to the strand diameter; In consideration of the number of wires in the inner layer corresponding to the wire diameter in the outer layer, the wire diameter is calculated and divided and set. In the case of the present invention, by appropriately reducing the diameter of the wire corresponding to the wire of the outer layer,
The number of wires in the inner layer is the same as the number of wires in the outer layer.
(D) Twisting a plurality of (14 to 17) wires of the inner layer into a fiber core having a corresponding diameter, twisting the same number of wires of the outer layer on the outside to form a strand, and (e) forming the strand A plurality (6 to 8) of the ropes are twisted to a rope fiber core having a corresponding diameter to produce wire ropes of various sizes.

The first embodiment shown in FIG. 1 is manufactured by a double twist type twisting machine employing an overtwist mechanism, and as described above, the outer layer wire 3 (or the wire 3) having a wire diameter set corresponding to the rope diameter or the like. 15 inner wires 2 (or inner wires, small-diameter wires) of the same number set to a moderately small diameter corresponding to 15 outer wires) and 15 outer wires 3 are used to convert 15 inner wires 2 to natural fibers or A strand 4 is twisted around a synthetic fiber core 1 and fifteen outer layers of wires 3 are twisted with the same pitch in the same twisting direction on the outside of the fiber core 1 as a strand 4 in a line-contacting seal configuration. Six strands 4 are twisted around the core 5 to produce a wire rope having a 6 × S (30) structure shown in FIG. 1 (A).

The wire rope of the present invention has the same number of wires 15 as the 15 small-diameter wires 2 divided into an inner layer and an outer layer, and has the same pitch in the same twist direction as compared with the conventional 24-wire 6-strand (6 × 24 structure). It has a feature in the strand 4 which is twisted in a line contact state to form a seal. The decrease in the effective area due to the reduction in the diameter of the inner layer wire 2 is offset by the increase in the number of wires 2 and 3 in the outer and inner layers. In addition to a high cutting load, the inner layer wire 2 has a smaller diameter to increase flexibility, and the inner and outer layer wires 2 and 3 prevent the occurrence of localized concentrated stress due to the line contact state, and the wire slides. To improve flexibility, fatigue, life, etc., and improve flexibility to improve handling, terminal workability, etc. In addition, the same number of small-diameter wires 2 and wires 3 are divided into inner and outer layers for line contact. By twisting to the state and making a seal configuration, Has advantages such stranding accuracy of the wire 2 is enhanced.

Furthermore, the wire rope of the present invention is manufactured by a double twist method using an over twister mechanism, which separates the wire supply section from the machine body, and has the advantages of saving space and increasing the capacity of the splice section. And the inner and outer layers of the wire 2 by adopting the over twister mechanism.
And 3 are adjusted to a uniform tension and twisted almost simultaneously at the same time before and after, and a high-quality strand 4 with a perfect circle, straightness, narrowing and little variation is obtained, and the twisting efficiency is almost doubled, thereby increasing the productivity. Improved and cost savings.

(Specific Example 1) In order to compare typical examples of wire ropes of various sizes in the present invention with a conventional wire rope, a rope diameter of
Each wire rope of the conventional 6 × 24 structure and 6 × S (30) structure of the present invention was manufactured under the conditions of φ under the conditions of Table 1, and various characteristics were compared and evaluated in Table 2. (Specific Example 2) The wire rope of the present invention was manufactured under the same manufacturing conditions and by changing the number of pitches and wires as shown in Table 3.
Compared and evaluated as shown in Table 4 in comparison with the conventional 6 × 24 structure In Tables 2 and 4, the effects of the present invention are similarly evaluated.

2 (A), 2 (B) and 2 (C) show another embodiment of the present invention. As shown in FIG. 2 (A), 14 fibers are provided around a fiber core 1 made of a natural fiber or a synthetic fiber. As shown in FIG. 2 (B), the same number of wires 3a as the small diameter wire 2a are divided into an inner layer and an outer layer, and the strands 4a are formed into a sealed configuration by twisting in the same twist direction in the same pitch with a similar pitch. Alternatively, a strand 4b having a seal configuration in which the same number of wires 3b as the 16 small-diameter wires 2b are divided into inner and outer layers and twisted in a line contact state around the fiber core 1 of the synthetic fiber is shown in FIG. 2 (C). As shown, around the fiber core 1 of natural fiber or synthetic fiber,
17 small-diameter wires 2c and the same number of wires 3c are divided into inner and outer layers to form a strand 4c having a seal configuration in which they are twisted in a line contact state, and six strands 4a, 4b, and 4c are twisted around the rope fiber core 5. It can also be configured as a wire rope.

Fig. 4 shows the characteristic values of the wire rope of the conventional 6x24 structure.
A characteristic diagram in which the characteristic values of each embodiment are compared with each other as 0, and
As is clear from the figure, each of the embodiments has high cutting load characteristics and excellent flexibility characteristics and fatigue characteristics,
It has the effect of greatly reducing costs with a long life.

In each of the above embodiments, only the case where the six strands 4 are twisted is described. However, almost the same effect can be obtained by twisting seven or eight strands.

(Effects of the Invention) The present invention is configured as described above, and has 14 to 17 outer layer wires set to the wire diameter corresponding to the rope diameter and the like and the same number set to the small diameter corresponding to the outer layer wire. The inner layer wire is divided into an inner layer and an outer layer around the fiber core, and is stranded in the same twisting direction with a similar pitch to form a sealed strand. Six to eight of these strands are used as the rope fiber core. It is a wire rope twisted around, has high cutting load characteristics, has excellent flexibility characteristics and fatigue characteristics, and has effects such as long life and significant cost savings.

[Brief description of the drawings]

FIG. 1A is a sectional view of a wire rope showing a first embodiment of the present invention, FIG. 1B is an enlarged sectional view of the strand of FIG. 1A, and FIG. FIG. 2 (B) is a side view showing the strand shown in FIG.
FIG. 3 (C) is a cross-sectional view of a strand showing another embodiment, FIGS. 3 (A) and 3 (B) are cross-sectional views of a wire rope showing a conventional example and a side view showing the strand partially cut away, and FIG. The figure is a characteristic diagram comparing each characteristic value of each embodiment with each characteristic value of the conventional wire rope being 1.0. 1; fiber cores 2, 2a, 2b, 2c; small diameter wires 3, 3a, 3b, 3c; wires 4, 4a, 4b, 4c; strands 5; 1; fiber core 2, 2a, 2b, 2c, 3, 3a, 3b, 3c; wire 4; central fiber core 5, 5a, 5b, 5c; strand

Claims (1)

(57) [Scope of request for utility model registration] 1. An inner layer around a fiber core, comprising 14 to 17 outer layer wires set to a wire diameter corresponding to a rope diameter and the like and an inner layer wire of the same number set to a smaller diameter corresponding to the outer layer wire. And an outer layer, wherein the strands have a seal structure in which the strands are twisted in a line contact state in the same twisting direction in the same twisting direction, and six to eight of the strands are twisted around a rope fiber core. rope.