JPH09228277A - Non-rotating multi-layer stranded wire rope - Google Patents

Abstract

(57) [Abstract] (Correction) [Problem] Constructed from both inner layer strands of normal twisted structure and rung twisted structure in which steel cores are alternately arranged to prevent rotation, deformation, wear and the like of the entire rope together with the steel core. The steel core can be used for both ropes of structure more than normal and structure of rung. SOLUTION: The inner layer strands 1b formed of Z and the inner layer strands 1c formed of S are alternately arranged and twisted in the same direction, and are alternately arranged. A steel core 1 having an inner layer strand 1c is provided, which is characterized by a non-rotatable multi-layer twisted wire rope 10, 20 in which a plurality of outer layer strands 5 or 15 are twisted in the steel core 1 in the same direction. In the above-mentioned non-rotatable multi-layer twisted wire rope 10, the steel core 1 is characterized in that a plurality of outer layer strands 5 are twisted together with the steel core 1 in a structure more than usual, or In the multi-layer twisted wire rope 20, a plurality of outer layer strands 15 are twisted in the steel core 1 in a structure with the steel core 1 and rungs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-rotatable multi-layer twisted wire rope suitable as a hoisting rope of a crane, which is required to have a high strength and a non-rotatability.

[0002]

2. Description of the Related Art The basic twisted structure of a wire rope is divided into a Z shape formed in a Z shape in the twisting direction of its strands and a strand and an S shape formed in an S shape in the opposite direction. In addition, the twisting direction of the strands is opposite to the twisting direction of the strands, and after twisting, the strands are almost oriented in the axial direction of the rope. On the other hand, the structure is roughly divided into a structure in which the strands are twisted in the same direction and the strands are oriented diagonally with respect to the axial direction of the rope after the stranding (see FIG. 3).

A typical conventional wire rope used for hoisting ropes of a crane is as shown in the cross-sectional views of FIG.
A multi-layer stranded wire rope R1 (7 + 7 + 6 × Fi (filar type) [1+ (7 + 7) +14] structure in which six outer layer strands Sb1 are twisted around a steel core (rope core) Sa1 having a (7 × 7) structure 2A), the same steel core Sa2 6
7 × 7 + 6 × twisted together with outer strands Sb2 of a book
WS (Wallington seal type) [1 + 6 + (6 + 6)
+12] multi-layer twisted wire rope R2 (see FIG. 2B), 7 × 7 + 6 × S (sealed type) [1 + 9 + 9] in which six strands Sb3 are twisted together on a similar steel core Sa3
There is a multi-layer twisted wire rope R3 (see FIG. 2C) having a structure.

In each of the above-mentioned multi-layer twisted wire ropes, when the rope is made of ordinary Z as shown in FIG. 3A, the steel core Sa (1 to 3) having a structure of rung Z is formed.
When the outer layer strands Sb (1 to 3) are twisted into a structure of ordinary Z and the rope is made of a structure of ordinary S as shown in FIG. When twisting and constructing the rope from the rung Z as shown in FIG. 3C, the outer strand is twisted from the rung Z to the structure of the steel core of the ordinary Z structure, and the rope is made from the rung S to the structure as shown in FIG. 3D. If you want to
The outer layer strands are twisted in the structure of the rung S on the steel core of the structure of ordinary S to form a rope structure having high strength, moderate flexibility, and improved fatigue resistance and collapse resistance.

[0005]

Although the conventional multi-layer twisted wire rope has the above-mentioned characteristics, it requires a steel core having a different structure corresponding to the structure, which increases the cost. In addition, when it is used for hoisting ropes of cranes, etc., the steel core easily rotates in the untwisting direction along with the outer strands under load, and the suspended load is rotated, which causes work problems and reduces the durability of the rope. is there.

The present invention was developed in order to solve the above-mentioned problems, and the object of the present invention is to provide both inner-layer strands of ordinary twist structure and rung twist structure in which steel cores are alternately arranged. By increasing the untwisting resistance of the steel core under load and the locking force of the outer layer strands under load, the rotation and deformation of the entire rope together with the steel core are effectively reduced, and the steel core has a structure more than usual. The purpose of the present invention is to provide a multi-layered twisted wire rope that can be used for both ropes having a structure of langue and rung, and that has improved shape-deformation resistance, durability, and the like, as well as difficulty in rotation, and that is cost-saving and that is difficult to rotate.

[0007]

The present invention provides a multi-layer twisted wire rope in which a plurality of outer layer strands are twisted on a steel core formed by twisting a plurality of inner layer strands, and
And an inner layer strand formed of S are alternately arranged and twisted in the same direction to form a steel core having an inner layer strand of a normal structure and an inner layer strand of a rung structure that are alternately arranged. , A plurality of outer layer strands are twisted in the same direction in the same direction into a structure of ordinary strands or a structure of rungs, and the inner layer strands of both the ordinary strands and the rungs structure, which are alternately arranged, make the steel core under load. By increasing the untwisting resistance and the locking force of the outer layer strand, etc., it is possible to effectively reduce the rotation and shape deformation of the entire rope together with the steel core, and it can be used for both the steel core structure and the rope structure. As a result, it is possible to reduce the cost by improving the anti-rotation property as well as the collapse resistance and durability. Therefore, when it is used as a hoisting rope of a crane or the like, the rotation of a suspended load or the like is significantly reduced, and the work is efficiently performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a cross-sectional view of the first and second embodiments of the present invention, FIG. 1B is a side view of the first embodiment, and FIG. 1C is its second embodiment. FIG. In the figure, a1 and a2 are strands of a steel core structure and a rung structure, and b1 and b2 are strands of outer strands of a normal strand structure and a rung structure, 1 is a steel core (rope core), 1a Is a center strand of the steel core, 1b is an inner layer strand of a normal core structure of the steel core, 1c is an inner layer strand of a structure of a rung of the steel core, and 5 and 15 are the first and second embodiments in which they are twisted to the steel core. The outer layer strands 10 and 20 are the non-rotatable multi-layer twisted wire ropes of the first and second examples.

The illustrated embodiment is a multi-layer twisted wire rope in which a plurality of outer layer strands 5 or 15 are twisted on a steel core 1 in which a plurality of inner layer strands are twisted,
The inner layer strands 1b formed from Z and the inner layer strands 1c formed from S are alternately arranged and twisted in the same direction (in the illustrated example, the direction from Z), and the inner layer strands 1b having an ordinary structure and arranged alternately are formed. A steel core 1 having an inner-layer strand 1c having a structure from a rung is provided, and a plurality of outer-layer strands 5 or 15 are twisted in the steel core 1 in the same direction to form a non-rotatable multi-layer twisted wire rope 10 or 20. There is.

Further, in the above-mentioned non-rotatable multi-layer twisted wire rope 10, a plurality of outer layer strands 5 are twisted around the steel core 1 in a structure more than usual, and the non-rotatable multi-layer twisted wire rope is characterized. It is connected to the wire rope 10.

Alternatively, in the above-mentioned difficult-to-rotate multi-layer twisted wire rope 20, a plurality of outer-layer strands 15 are twisted in a structure from a rung on the steel core 1 to form a difficult-to-rotate multi-layer twist. It is attached to the wire rope 20.

More specifically, in the illustrated example, the steel core 1 is composed of a strand having a (1 + 6) structure in which seven strands (various plating strands are used if necessary) are twisted together. As the central strand 1a, inner layer strands 1b (3 pieces) formed from Z and inner layer strands 1c (3 pieces) formed from S are alternately arranged, and twisted into a structure from Z and arranged alternately. A (7 + 7) structure having an inner layer strand 1b having a structure of Z and an inner layer strand 1c having a structure of a rung Z, and a steel core in the case where the outer layer strands 5 or 15 are twisted together from Z and formed into a rope from Z Applied to. When the rope is made of S, the steel core 1 is made of S. As for the number of strands of each strand constituting the steel core 1, the number of strands, and the like, various structures having similar characteristics may be applied as necessary in addition to the illustrated example.

Further, the outer layer strand 5 of the first embodiment is
In the illustrated example, 29 strands of different diameters (various plating strands are used as needed) are twisted together from Z to form a 6 × Fi (filar type) [1+ (7 + 7) +14] structure, the second embodiment. The outer layer strand 15 has a similar structure in which it is twisted from S in the illustrated example, and is formed by twisting a large number of strands into a filler shape, and has high strength and excellent abrasion resistance. It has a structure that demonstrates collapse resistance. In addition, both of them have similar characteristics as needed.
WS (Wallington seal type) shown in B [1 + 6 +
The (6 + 6) +12] structure and the S (seal type) [1 + 9 + 9] structure shown in FIG. 2C are also applied.

The first and second embodiments shown in FIG.
Both of them are ropes rather than Z, and as described above, the inner layer strands 1b (3 pieces) and the rung Z having the structure more than the ordinary Z are used.
The steel core 1 having a structure (7 × 7) in which the inner layer strands 1c (three) of the structure are alternately arranged and twisted together is used as a rope core, and in the first embodiment, the steel core 1 described above is provided with Fi ( Filler type) [1+ (7 + 7) +14] structure outer layer strand 5
In particular, as shown in FIG. 1B, a twisted multi-layer twisted wire rope 10 of 7 × 7 + 6 × Fi [1+ (7 + 7) +14] structure in which six twisted wires are twisted into a structure as shown in FIG. 1B, or the second embodiment. Has a steel core 1 with Fi (filar type) [1+ (7+
6) of the outer layer strands 5 of the structure 7) +14]
7 × 7 + 6 twisted into structure from Lang Z like C
The non-rotating multi-layer twisted wire rope 20 has a structure of × Fi [1+ (7 + 7) +14].

Although not shown in the figure, in the case of a rope with a strand of S, the steel core 1 is formed with a strand of S and the steel core 1 is formed.
Further, the outer layer strands 5 or 15 are usually twisted into a structure of S or a structure of rungs S to form a non-rotatable multi-layer twisted wire rope 10 or 20 having basically the same structure.

Each of the above-mentioned multi-layer stranded wire ropes 10, 20
In Fig. 1B or C, the steel core 1 is formed into a normal twist structure and a rung twist structure in which inner layer strands 1b and inner layer strands 1c are alternately arranged and twisted together. The strand a1 and the strand a2 of the inner-layer strand 1c of the rung structure are alternately arranged substantially parallel and oblique to the rope center axis direction as shown in the figure, and untwisting resistance of untwisting is effective. The rotational torque due to the load, that is, the rotation of the steel core 1 is effectively reduced without any particular influence on its strength.
Excellent shape and rotation resistance, such as reduced shape deformation and wear, has been achieved, resulting in significantly improved shape deformation resistance and durability.

Further, each strand b1 or b2 of the outer strand 5 or 15 twisted around the steel core 1 is as shown in FIG.
Inner layer strands 1b alternately in strand units like C
The wire is almost in line contact with either of the strands a1 or a2 and the locking force is enhanced, and the excellent resistance to rotation of the steel core 1 enhances the untwisting resistance of the outer layer strands 5 and 15 in the untwisting direction. As a result, the rope as a whole has no particular effect on the strength, such as reduced wear and tear, and has excellent overall self-rotation properties, as well as improved collapse resistance and wear resistance. Therefore, even when it is repeatedly used by being used as a hoisting rope of a crane and the like, twisting back deformation and the like are significantly reduced, and the durability of the rope is effectively enhanced. The rotation of the suspended load is remarkably reduced, and the work is efficiently performed.

The present invention can be applied to various structures having similar characteristics to the concrete structures of the steel core and the outer layer strands in addition to the illustrated example. For example, high strength composites as shown in FIGS. It is also applied to layer-twisted wire ropes.

[0019]

As described above, the present invention provides a multi-layer twisted wire rope in which a plurality of inner layer strands are twisted on a steel core obtained by twisting a plurality of inner layer strands as described above. With both inner layer strands of ordinary structure and rung structure, the strength is secured and the untwisting resistance in the untwisting direction is increased to effectively reduce the rotation, shape collapse and wear of the steel core under load. The strands of the outer layer strands twisted into the steel core are alternately in almost line contact with each other, increasing the locking force in the untwisting direction of the outer layer strands and reducing untwisting, shape collapse, and wear. As a whole, the rope as a whole has significantly improved its anti-rotation performance as well as its collapse resistance and durability.

Further, the above-mentioned steel core can be used for both ropes having a structure more than usual and a structure having a rung, so that the steel core can be easily manufactured and the cost can be reduced. When used for hoisting ropes of cranes,
This has the advantage that the rotation of the suspended load is significantly reduced and the work efficiency is increased.

[Brief description of drawings]

FIG. 1 is a cross-sectional view (A) of a non-rotating multi-layer twisted wire rope showing each embodiment of the present invention, a side view of the first embodiment (B) and a side view of the second embodiment. (C)

FIG. 2 is cross-sectional views (A), (B), and (C) of typical conventional examples of multi-layer twisted wire ropes.

FIG. 3 is a side view (A), (B), (C) showing respective aspects of a twisted structure in a conventional multi-layer twisted wire rope.
(D).

[Explanation of symbols]

 1 Steel core 1b Inner layer strand (from ordinary) 1c Inner layer strand (from rung) 5,15 Outer layer strand 10, 20 Non-rotatable multi-layer twisted wire rope

Claims (3)

[Claims] 1. A multi-layer twisted wire rope comprising a steel core formed by twisting a plurality of inner layer strands and a plurality of outer layer strands twisted together, and an inner layer strand formed of Z and an inner layer strand formed of S. Are alternately arranged and twisted in the same direction to form a steel core having an inner layer strand of ordinary structure and an inner layer strand of rung structure that are alternately arranged, and multiple outer layer strands are twisted in the same direction in the same steel core. Non-rotating multi-layer twisted wire rope characterized by being combined. 2. The non-rotatable, multi-layer stranded wire rope according to claim 1, wherein a plurality of outer layer strands are twisted in a structure rather than ordinary in the steel core. Layered wire rope. 3. The non-rotating multi-layer twisted wire rope for a cable according to claim 1, wherein a plurality of outer layer strands are twisted into a structure from a rung in the steel core. Multi-layer twisted wire rope.