JPH108388A - Modified line wire rope and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the processing of a strand modified twisted line at high diameter reducing factor of >=10% during the line processing and to prepare a modified line wire rope, having high strength. SOLUTION: When plural lines of wires (w) are intertwisted into a multilayered structure to prepare a strand S, each of the wires (w) is processed by passing through a pair of dies 4, 5 serially placed to deform each wire (w), which becomes the outermost layer of the strand S, in two steps into modified shape so that a diameter reducing factor of the strand S becomes >=10% and the plural lines of the resultant strands S are intertwisted to prepare the objective modified line wire rope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deformed wire rope used as, for example, a hoisting rope of a crane, and a method of manufacturing the same.

[0002]

2. Description of the Related Art For example, as a hoisting rope of a crane,
High strength is required as the crane device is reduced in size and weight, and deformed wire ropes are widely used to meet this requirement.

[0003] In the deformed wire rope, each wire of the outermost layer of the strand is deformed from a round shape into a substantially fan shape and brought into surface contact with each other, thereby reducing the diameter of the strand. Therefore, the rope diameter is reduced by reducing the diameter of each strand, and the cutting load with respect to the rope diameter is improved.

Conventionally, a single die is used for twisting a strand of a deformed wire rope, and each wire is twisted with the die, and the outermost wire is deformed into a different shape.

[0005]

However, in the deformed stranded wire processing of a strand using one die, the degree of plastic deformation of the wire is limited, and the diameter reduction ratio of the strand (the diameter of the strand before the deforming is performed) is limited. , It is difficult to increase the diameter of the strand after the deforming process, and particularly in a multilayer structure having a large number of strand-constituting wires, it is difficult to form at a high diameter reduction rate, and the diameter reduction rate is 10%. Stays less than.

[0006] In a deformed wire rope having a diameter reduction ratio of less than 10%, the rate of increase in the cutting load of a normal rope formed of a wire having the same diameter and a circular cross section is about 20%. It is difficult to want a high level.

The present invention has been made in view of such a point, and an object of the present invention is to enable processing at a high diameter reduction rate at which a diameter reduction rate becomes 10% or more at the time of strand irregularly shaped stranded wire processing. Accordingly, it is another object of the present invention to obtain a high-strength deformed wire rope.

[0008]

In order to achieve this object, according to the first aspect of the present invention, when a plurality of wires are twisted into a multilayer structure to form a strand, the wires are arranged in series. Each wire, which is the outermost layer of the strand, is passed through two dies and deformed in two stages to have an irregular shape and processed so that the diameter reduction rate of the strand is 10% or more.
A plurality of such strands are twisted to produce a deformed wire rope.

In the invention of claim 2, when a plurality of wires are twisted into a multilayer structure to form a strand,
Each wire as an inner layer of the strand is twisted through a first die and deformed into an irregular shape, and a wire passing through the first die and each wire as an outermost layer of the strand are passed through a second die. The outermost wire of the strand is twisted around the wire passing through the first die and deformed into an irregular shape to form a strand having a diameter reduction ratio of 10% or more. It is characterized in that a deformed wire rope is manufactured by twisting a plurality of wires.

According to a third aspect of the present invention, there is provided an irregularly shaped wire rope formed by twisting a plurality of strands having a multilayer structure, wherein each of the outermost layers of each strand has a diameter reduction ratio of the strand of 10% or more. It is characterized by being processed into a different shape so that

According to a fourth aspect of the present invention, there is provided an irregularly shaped wire rope formed by twisting a plurality of strands having a multilayer structure, wherein each of the outermost wires of each of the strands is provided inside the respective outermost wires. It is characterized in that each of the arranged wires and the wire of the inner layer adjacent thereto are processed into a different shape so that the diameter reduction ratio of the strand is 10% or more.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment will be described. FIG. 1 shows a partial configuration of a stranded wire machine. Reference numeral 1 denotes a rotor (rotary cylinder) of the stranded wire machine, and a pair of wire guides 2 and 3 are attached to one end of the rotor 1. Have been. Then, the first side of the wire guide 3
And a second die 5 are coaxially arranged in series with the rotor 1.

The rotor 1 rotates in one direction at a constant speed,
A plurality of wires w having a circular cross section are led out from the end of the rotor 1 in accordance with this rotation, and these wires w are introduced into the first die 4 and the second die 5 from the wire guides 2 and 3 and sequentially indicated by arrows. Taken in the direction.

According to this step, each wire w is simultaneously twisted in the same direction in the first die 4, and the strand S is formed by this twisting. The wire w of the outermost layer of the strand S is processed by the first die 4 so as to be deformed from a circular cross section into a substantially fan-shaped irregular shape. Then, when the strand S passes through the second die 5, the wire w of the outermost layer is processed by the second die 5 so as to be further deformed into a different shape.

FIG. 2 shows an example of the structure of the strand S obtained in this step. The wire w of the outermost layer is greatly deformed into an irregular shape, and the outer diameter of the strand S is greatly reduced. . FIGS. 3A and 3B show the structure of a deformed wire rope in which a plurality of the strands S are twisted.

The diameter reduction ratio of the strand S that can be achieved by one die is less than 10%.
By using the dies 4 and 5 and processing the wire w of the outermost layer of the strand S into two different stages and processing them into different shapes, the diameter reduction ratio can be made a large value exceeding 10%.

Therefore, in the deformed wire rope A formed by twisting a plurality of strands S obtained in the process of this embodiment, each wire has a circular cross section even if the rope structure is the same. Wire rope B,
In addition, the diameter of the rope is reduced as compared with the conventional deformed wire rope C in which the diameter reduction ratio of the strand is less than 10%.

That is, on the basis of the same rope diameter, the deformed wire rope A according to the present embodiment is different from the general wire rope B and the conventional deformed wire rope C having the same structure. The substantial cross-sectional area increases. And the cutting load (RB
S) is improved.

The following Table 1 shows the cutting load (RBS) of a general wire rope B and the reduction ratio and cutting load (RB) of a conventional deformed wire rope C for each rope structure.
S), the diameter reduction ratio and the cutting load (RBS) of the deformed wire rope A according to the present embodiment, and the general wire rope B.
And the increase rate of the cutting load (RBS) of the deformed wire rope A according to the present embodiment with respect to the conventional deformed wire rope C and the increasing rate of the cutting load (RBS) of the deformed wire rope A according to the present embodiment. Is shown.

[0020]

[Table 1]

As shown in Table 1, in the deformed wire rope A according to the present embodiment, the cutting load is increased by 30% or more compared with the general wire rope B, and the conventional deformed wire rope is used. For C, the cutting load is increased by 20% or more.

Next, a second embodiment of the present invention will be described. In the second embodiment, as shown in FIG. 4, a first die 4 is attached to a wire guide 3 of a twisting machine, and a second die 5 is coaxially mounted on a front side of the first die 4. Are provided in series.

In the second embodiment, the rotor 1 of the stranded wire machine rotates in one direction at a constant speed, and a plurality of wires w having a circular cross section are formed from the end of the rotor 1 in accordance with the rotation. Out of these wires w, a plurality of wires w1 constituting the inner layer of the strand S are introduced into the first die 4 and twisted, and the twisted inner wire w1 and the outermost layer of the strand S are connected to each other. The remaining plural wires w2 to be constituted are introduced into the second die 5, and
The outermost wire w2 is twisted around the outer circumference of the inner wire w1 by the second die 5, whereby a strand S is formed.

In this step, the wire w1 arranged on the outermost layer among the inner wires w1 is processed by the first die 4 so as to be deformed from a circular cross section into a substantially fan-shaped irregular shape. When a plurality of remaining wires w2 constituting the outermost layer of the strand S are twisted around the outer periphery of the inner wire w1, a plurality of wires w2 constituting the outermost layer of the strand S are connected to the second die 5. Thereby, it is processed so as to be transformed from a circular cross section into a substantially fan-shaped irregular shape.

FIG. 5 shows an example of the structure of the strand S obtained in this step, in which the outermost layer wire w2 is deformed into an irregular shape, and the outermost layer wire w2 is further deformed.
2, the outermost layer wire w2 and the inner layer wire w1 adjacent thereto are also deformed into an irregular shape, whereby the outer diameter of the strand S is greatly reduced. FIGS. 6A and 6B show the structure of a deformed wire rope in which a plurality of the strands S are twisted.

The diameter reduction ratio of the strand that can be achieved by one die is less than 10%. However, as in the present embodiment, the wire w2 of the outermost layer of the strand S is used by using two dies 4 and 5; By processing the inner layer wire w1 disposed inside this into a different shape, the diameter reduction rate is reduced to 10%.
%.

Therefore, in the deformed wire rope A formed by twisting a plurality of strands S obtained in the process of the present embodiment, each wire has a circular cross section even if the rope structure is the same. Wire rope B,
In addition, the diameter of the rope is reduced as compared with the conventional deformed wire rope C in which the diameter reduction ratio of the strand is less than 10%.

That is, when the same rope diameter is used as a reference, the deformed wire rope A according to the present embodiment is different from the general wire rope B and the conventional deformed wire rope C having the same structure. The substantial cross-sectional area increases, and the increase in the cross-sectional area improves the cutting load (RBS).

The following Table 2 shows the cutting load (RBS) of a general wire rope B and the reduction ratio and cutting load (RB) of a conventional deformed wire rope C for each rope structure.
S), the diameter reduction ratio and the cutting load (RBS) of the deformed wire rope A according to the present embodiment, and the general wire rope B.
And the increase rate of the cutting load (RBS) of the deformed wire rope A according to the present embodiment with respect to the conventional deformed wire rope C and the increasing rate of the cutting load (RBS) of the deformed wire rope A according to the present embodiment. Is shown.

[0030]

[Table 2]

As shown in Table 2, in the modified wire rope A according to the present embodiment, the cutting load is increased by 30% or more with respect to the general wire rope B, and the conventional modified wire rope A is used. For C, the cutting load is increased by 20% or more.

[0032]

As described above, in the present invention,
Since the diameter reduction ratio of the strand is 10% or more, a high-strength deformed wire rope can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a method for manufacturing a deformed wire rope according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a strand constituting the deformed wire rope.

FIG. 3 is a sectional view of the deformed wire rope.

FIG. 4 is an explanatory diagram for explaining a method for manufacturing a deformed wire rope according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a strand constituting the deformed wire rope.

FIG. 6 is a sectional view of the deformed wire rope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotor 2 ... Wire guide 3 ... Wire guide 4 ... 1st die 5 ... 2nd die w ... Wire S ... Strand

Claims (4)

[Claims] When a plurality of wires are twisted into a multi-layer structure to form a strand, each wire is passed through two dies arranged in series, and each wire serving as the outermost layer of the strand is formed in two stages in a different shape. The method for producing a deformed wire rope is characterized in that the wire is processed so that the diameter reduction rate of the strand is 10% or more, and a plurality of such strands are twisted to produce a deformed wire rope. . 2. When a plurality of wires are twisted into a multi-layer structure to form a strand, each wire forming an inner layer of the strand is twisted through a first die and deformed into a different shape. Wire through the dice,
And passing each wire forming the outermost layer of the strand through a second die, twisting each wire forming the outermost layer of the strand around the wire passing through the first die, and deforming the wire into an irregular shape to reduce the diameter. Forming a strand of 10% or more and twisting a plurality of such strands to produce a deformed wire rope. 3. An irregularly shaped wire rope formed by twisting a plurality of strands having a multilayer structure, wherein each wire of the outermost layer of each strand has an irregular shape such that the diameter reduction rate of the strand is 10% or more. A deformed wire rope characterized by being processed into a wire. 4. A deformed wire rope obtained by twisting a plurality of strands having a multilayer structure, wherein each of the outermost layers of each strand is disposed inside each of the outermost wires. And a wire in an inner layer adjacent thereto are processed into different shapes so that the diameter reduction ratio of the strand is 10% or more.