WO2021033497A1

WO2021033497A1 - Wire rope

Info

Publication number: WO2021033497A1
Application number: PCT/JP2020/028833
Authority: WO
Inventors: 悠篠原
Original assignee: 朝日インテック株式会社
Priority date: 2019-08-22
Filing date: 2020-07-28
Publication date: 2021-02-25
Also published as: JP7138251B2; EP4019695A1; US20220170204A1; JPWO2021033497A1; EP4019695A4

Abstract

The present invention improves the elongation resistance of a wire rope by enhancing the filling rate of the wire rope. This wire rope is provided with a plurality of strands that are twisted with each other, and the plurality of strands each have a configuration in which a plurality of element wires are twisted with each other. The wire rope is further provided with a single wire that is disposed in a recess section formed on the outer peripheral side of the wire rope by two strands that are adjacent to each other in the peripheral direction of the wire rope. In the transverse cross-section of the wire rope, a portion of the single wire is positioned inside a virtual circumscribed circle of one of the two strands.

Description

Wire rope

The technology disclosed in this specification relates to wire rope.

There are so-called single twist and so-called double twist as the form of the wire rope. Single twist is a form in which a plurality of single wires are twisted to each other, and double twist is a form in which a plurality of strands composed of a plurality of strands twisted to each other are twisted to each other. Since the single-twisted wire rope has higher rigidity than the double-twisted wire rope, there is an advantage that the wire rope has high elongation resistance, for example, the initial elongation is small. Here, the initial elongation of the wire rope is the elongation that occurs in the initial stage when a new wire rope is used. If the initial elongation of the wire rope is large, the operability of the wire rope may decrease. Therefore, it is preferable that the initial elongation of the wire rope is small. On the other hand, the double-twisted wire rope has lower rigidity than the single-twisted wire rope, but the flexibility of shape change is higher by that amount. Therefore, for example, the wire rope is used by inserting it into a curved tube. In this case, there is an advantage that the frictional resistance of the wire rope in the tube is small and the slidability is high.

Therefore, conventionally, a technique of arranging a filling wire or an Ag strand (hereinafter, referred to as “filling wire or the like”) between each of a plurality of strands in a double-twisted wire rope has been known (for example, Patent Document 1). , 2). In these conventional techniques, the filling rate of the wire rope (the small gap in the cross section of the wire rope) is increased by interposing the filling wire or the like between two strands adjacent to each other. Therefore, the elongation resistance of the wire rope can be improved. That is, according to these conventional techniques, it is expected that the stretch resistance of the wire rope is improved while ensuring the flexibility of the shape change.

Japanese Unexamined Patent Publication No. 7-138923 U.S. Pat. No. 6049042

However, in the above-mentioned conventional technique, since the filling wire or the like is simply twisted along the two strands adjacent to each other, there is a cavity between the filling wire or the like and the strands constituting the strand. , The filling rate of the wire rope is insufficient, and the elongation resistance of the wire rope cannot be sufficiently improved.

This specification discloses a technique capable of solving the above-mentioned problems.

The technology disclosed in the present specification can be realized, for example, in the following form.

(1) The wire rope disclosed in the present specification includes a plurality of strands twisted to each other, and each of the plurality of strands has a configuration in which a plurality of strands are twisted to each other. A single wire is provided in a recess formed on the outer peripheral side of the wire rope by two strands adjacent to each other along the circumferential direction of the wire rope, and the cross section of the wire rope includes a single wire. A part of the single wire is located inside the virtual tangent circle of one of the two strands. In this wire rope, a single wire is arranged in a recess formed on the outer peripheral side of the wire rope by two strands adjacent to each other. Then, the gap existing between the two strands is filled so that a part of the single wire is located inside the virtual circumscribed circle of one of the two strands adjacent to each other. Therefore, according to this wire rope, compared with a configuration in which a single wire is interposed between two strands adjacent to each other, or a configuration in which a single wire is located outside the virtual tangent circle of two strands adjacent to each other. , The filling rate of the wire rope can be increased, and thus the elongation resistance of the wire rope can be improved.

(2) In the wire rope, in the cross section, inside the wire rope in the radial direction with respect to the single wire, the wire of one of the two strands and the wire of the other strand. The strands may be arranged adjacent to each other, and a part of the single wire may be located between the strands of the one strand and the strands of the other strand in the circumferential direction. In this wire rope, the gap existing between the two strands is filled so that the single wire constitutes two strands adjacent to each other and is located between the strands arranged adjacent to each other. Has been done. Therefore, according to this wire rope, the filling rate of the wire rope can be increased as compared with the configuration in which the single wires are not located between the strands arranged adjacent to each other, thereby improving the elongation resistance of the wire rope. Can be planned more effectively.

(3) In the wire rope, in the cross section, the single wire is in contact with the wire of one of the two strands and the wire of the other strand. May be. In this wire rope, the gap existing between the two strands is filled so that the single wire contacts the strands constituting the two strands adjacent to each other. Therefore, according to this wire rope, the filling rate of the wire rope can be increased as compared with the configuration in which the single wire is separated from the strands formed by the strands, which is more effective in improving the elongation resistance of the wire rope. Can be targeted.

(4) In the wire rope, in the cross section, the cross-sectional area of the single wire may be larger than the cross-sectional area of each of the strands constituting the strand. In this wire rope, the strength of the wire rope by the single wire can be improved as compared with the configuration in which the cross-sectional area of the single wire is smaller than the cross-sectional area of each strand of the strand.

(5) In the wire rope, the tensile strength of the single wire may be lower than the tensile strength of each of the strands constituting the strand. According to this wire rope, the elongation resistance of the wire rope is increased because the single wire easily bites between the strands of the two strands as compared with the configuration in which the tensile strength of the single wire is equal to or higher than the tensile strength of the strands constituting the strand. Improvement can be achieved more effectively.

(6) In the wire rope, the tensile strength of the single wire may be in the range of ± 5% of the tensile strength of each of the strands constituting the strand. According to this wire rope, the tensile strength of the wire rope as a whole can be made uniform.

(7) In the wire rope, the area of the virtual circumscribed circle is a perfect circle having the same area as the area of the strands when all the strands constituting the one strand are perfect circles. The configuration may be smaller than the area of the virtual circumscribed circle of the virtual strand (if any). According to this wire rope, the area of the virtual circumscribed circle of the strand is the same as that of the virtual circumscribed circle of the virtual strand, and the stretch resistance of the wire rope is increased by the smaller gap between the strands. Improvement can be achieved more effectively.

(8) In the wire rope, in the cross section, the area of the virtual circumscribing circle of the single wire is when the single wire is a perfect circle (when the area is the same as the area of the single wire). The configuration may be larger than the area of the single wire (the area of the perfect circle). According to this wire rope, a recess (gap) formed on the outer peripheral side of the wire rope by two strands adjacent to each other can be effectively filled (closed) by a single wire. Therefore, the gap between the plurality of strands inside each side strand (each side strand) can be more effectively filled (closed) by the plurality of strands. Therefore, the elongation resistance of the wire rope can be improved more effectively.

(9) In the wire rope, the single wire is adjacent to the first single wire arranged in a recess formed on the outer peripheral side of the wire rope by the first set of the strands adjacent to each other. Includes a second single wire arranged in a recess formed on the outer peripheral side of the wire rope by the strands of the pair, and is positioned so as to sandwich the first single wire in the circumferential direction in the cross section. The distance between the pair of strands is longer than the distance between the pair of strands located so as to sandwich the second single wire in the circumferential direction, and among the strands of the first set, the first The number of the strands in contact with the single wire 1 may be larger than the number of the strands in contact with the second single wire among the strands of the second set. According to this wire rope, the longer the distance between the pair of strands sandwiching the single wire, the larger the number of strands in contact with the single wire. As a result, the larger the gap existing between the two strands adjacent to each other, the more the gap existing between the two strands is filled so that the single wire comes into contact with many strands. Therefore, according to this wire rope, the filling rate of the wire rope is the same as the configuration in which the number of strands in contact with the single wire is the same regardless of the size of the gap existing between the two strands. This makes it possible to improve the elongation resistance of the wire rope.

(10) In the wire rope, the single wire includes a first single wire arranged in a recess formed on the outer peripheral side of the wire rope by the first set of the strands adjacent to each other, and in the cross section. The distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction is positioned so as to sandwich the first single wire in the circumferential direction in a cross section different from the cross section. The number of the strands that are longer than the distance between the pair of strands and are in contact with the first single wire in the cross section of the first set of strands is determined in the other cross section. The number of the strands in contact with the first single wire may be larger than the number of the strands. According to this wire rope, the distance between a pair of strands located so as to sandwich the first single wire in the circumferential direction among the common first set of strands is different from the cross section of one wire rope. It differs from the cross section, and the longer the distance between the pair of strands sandwiching the first single wire, the greater the number of strands in contact with the first single wire. As a result, with respect to the common first set of strands and the first single wire, the larger the gap existing between the two strands, the larger the cross section of the first single wire comes into contact with more strands. As described above, the gap existing between the two strands is filled. Therefore, according to this wire rope, the number of strands in contact with the single wire is the same even though the gap existing between the two strands differs depending on the axial position of the wire rope. In comparison, the filling rate of the wire rope can be increased, and thus the elongation resistance of the wire rope can be improved.

(11) In the wire rope, the single wire is adjacent to the first single wire arranged in a recess formed on the outer peripheral side of the wire rope by the strands of the first set adjacent to each other. Includes a second single wire arranged in a recess formed on the outer peripheral side of the wire rope by the strands of the pair, and is positioned so as to sandwich the first single wire in the circumferential direction in the cross section. The distance between the pair of strands is longer than the distance between the pair of strands located so as to sandwich the second single wire in the circumferential direction, and among the strands of the first set. The number of the strands in contact with the first single wire is larger than the number of the strands in contact with the second single wire among the strands of the second set, and in the cross section. The distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction is positioned so as to sandwich the first single wire in the circumferential direction in a cross section different from the cross section. Of the first set of strands that are longer than the distance between the pair of strands, the number of strands in contact with the first single wire in the cross section is determined in the other cross section. The configuration may be larger than the number of the strands in contact with the first single wire. According to this wire rope, the filling rate of the wire rope can be increased, and thereby the elongation resistance of the wire rope can be improved.

(12) In the wire rope, the shape of the cross section of the wire may be different from any of a perfect circle, an ellipse, and an oval. According to this wire rope, the cross-sectional shape of the wire is different from that of a perfect circle, an ellipse, and an oval, so that the gap existing between the two strands is filled. As a result, the elongation resistance of the wire rope can be improved.

(13) In the wire rope, the shape of the cross section of the single wire may be different from any of a perfect circle, an ellipse, and an oval. According to this wire rope, the cross-sectional shape of the single wire is different from that of a perfect circle, an ellipse, and an oval, so that the gap existing between the two strands is filled. Therefore, the elongation resistance of the wire rope can be improved.

The technique disclosed in the present specification can be realized in various forms, for example, a wire rope, a method for manufacturing a wire rope, and the like.

Cross-sectional perspective view schematically showing the configuration of the wire rope 10 in the embodiment. Explanatory drawing showing cross-sectional structure of wire rope 10 in embodiment Explanatory drawing partially showing different cross-sectional configurations of the wire rope 10. Explanatory drawing which shows cross-sectional structure of side strand 30 and virtual strand 30P

A. Embodiment:
A-1. Configuration of wire rope 10:
FIG. 1 is a cross-sectional perspective view schematically showing the configuration of the wire rope 10 in the present embodiment, and FIG. 2 is an explanatory view showing the cross-sectional configuration of the wire rope 10 in the present embodiment. The wire rope 10 of the present embodiment can be used for various purposes (for example, for braking a bicycle, for operating an endoscope).

As shown in FIGS. 1 and 2, the wire rope 10 includes a core material 20, a plurality of (more specifically, 6) side strands 30, and a plurality of (more specifically, 6) wire ropes. It is equipped with a single wire 40 (40A to 40F).

The core material 20 has a plurality of metal strands 22 twisted together. More specifically, the core material 20 has a structure in which six metal strands 22 are twisted around one metal strand 22. Each metal wire 22 constituting the core material 20 is made of, for example, stainless steel (for example, SUS304).

The plurality of side strands 30 are twisted together around the core material 20. That is, the plurality of side strands 30 are arranged so as to be arranged along the circumferential direction of the wire rope 10 (the circumferential direction of the virtual circle centered on the central axis Q1 of the wire rope 10 (core material 20)). The central axis Q1 is the center of the virtual circumscribed circle of the metal wire 22 located at the center of the core material 20. When the core material 20 is composed of one wire, the central axis Q1 is the center of the virtual circumscribed circle in the cross section of the wire. Each side strand 30 has a plurality of metal strands 32 twisted together. More specifically, each side strand 30 has a configuration in which six metal strands 32 are twisted around one metal strand 32. Each metal wire 32 constituting the side strand 30 is made of, for example, stainless steel (for example, SUS304). The side strand 30 is an example of a strand in the claims, and each metal wire 32 constituting the side strand 30 is an example of a wire in the claims.

A plurality of single wires 40 are twisted around the core material 20 together with the side strands 30 in the same direction as the side strands 30. A single wire 40 is arranged in a recess formed on the outer peripheral side of the wire rope 10 by two side strands 30 adjacent to each other along the circumferential direction of the wire rope 10. That is, the wire rope 10 includes the same number of single wires 40 as the side strands 30. Further, each single wire 40 is composed of one metal wire. Each single wire 40 is made of, for example, stainless steel (eg, SUS304).

Further, in the present embodiment, since the wire rope 10 includes the six side strands 30, there are six combinations of the two side strands 30 adjacent to each other along the circumferential direction of the wire rope 10. In this embodiment, one single wire 40 is arranged for each of these six combinations. Further, in the present embodiment, the core material 20 is formed by Z twist, each side strand 30 is formed by S twist, and the plurality of side strands 30 and the single wire 40 around the core material 20 are formed by Z twist. However, the twisting method and twisting direction of each wire are not limited to these. The details of the cross-sectional structure of the wire rope 10 will be described below.

A-2. Details of the cross-sectional structure of the wire rope 10:
(Relationship between one single wire 40 and one side strand 30)
The wire rope 10 of the present embodiment satisfies the following first requirement with respect to one single wire 40 and one side strand 30.
<First requirement>
In at least one cross section of the wire rope 10 (a cross section orthogonal to the axial direction of the wire rope 10 (the direction along the central axis Q1 of the wire rope 10)), a part of at least one single wire 40 is a part of the wire rope 10 It is located inside the first virtual tangent circle M1 of at least one of the two side strands 30 adjacent to each other along the circumferential direction of the rope.
Here, the first virtual circumscribed circle M1 has the smallest radius among the perfect circles surrounding all the metal strands 32 constituting one side strand 30, and constitutes the side strand 30 (constituting the side strand 30). It is a perfect circle circumscribing a group of metal strands 32). The first requirement means that one single wire 40 bites into the metal strands 32 constituting one side strand 30 so as to be located between each other. In the wire rope 10, by satisfying the first requirement, a part of the single wire 40 exists between the two side strands 30 so as to be located inside the first virtual circumscribed circle M1 of the side strands 30. The gap is filled. Therefore, according to the present embodiment, the filling rate of the wire rope 10 can be increased as compared with the configuration in which the single wire 40 is located outside the first virtual circumscribed circle M1 of the side strand 30, whereby the wire can be increased. It is possible to improve the elongation resistance of the rope 10 (for example, reduce the initial elongation).

In addition, in at least one cross section of the wire rope 10, a part of one single wire 40 is a first virtual circumscribed circle of each of two side strands 30 adjacent to each other along the circumferential direction of the wire rope 10. It is preferably located inside the M1. This means that one single wire 40 bites into each of the two side strands 30 adjacent to each other so as to be located between the metal strands 32 of each side strand 30. As a result, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the filling rate of the wire rope 10 can be further increased, thereby improving the elongation resistance of the wire rope 10. It can be planned more effectively.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following first requirement A with respect to one single wire 40 and one side strand 30.
<First requirement A>
In at least one cross section of the wire rope 10, a part of at least one single wire 40 is located closest to the single wire 40 among the plurality of metal strands 32 constituting one side strand 30. It is located on the central axis Q2 side of the side strand 30 from the first virtual circumscribed line B1 that circumscribes both of the two metal strands 32.
Here, the first virtual circumscribed line B1 is located on the single wire 40 side of the two virtual straight lines that are in contact with each other so as to straddle both of the two metal strands 32 located closest to the single wire 40. It is virtual to do. The first requirement A means that the degree of biting of one single wire 40 with respect to one side strand 30 is larger than that of the first requirement described above. In the wire rope 10, by satisfying the first requirement A, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the filling rate of the wire rope 10 can be further increased. Therefore, the elongation resistance of the wire rope 10 can be improved more effectively.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following first requirement B with respect to one single wire 40 and one side strand 30.
<First requirement B>
In at least one cross section of the wire rope 10, at least one single wire 40 is two of the plurality of metal strands 32 constituting one side strand 30 that are located closest to the single wire 40. It is in contact with at least one of the metal wires 32.
In the wire rope 10, by satisfying the first requirement B, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the filling rate of the wire rope 10 can be further increased. Therefore, the elongation resistance of the wire rope 10 can be improved more effectively. Further, since the single wire 40 and the side strand 30 are in contact with each other, it is possible to prevent the liquid from entering the inside of the wire rope 10 through the gap between the single wire 40 and the side strand 30, so that the wire rope 10 is resistant to water immersion. The sex can be improved. Further, since the single wire 40 and the side strand 30 are in contact with each other, it is possible to suppress the axial displacement of the wire rope 10 between the single wire 40 and the side strand 30 due to the deformation of the wire rope 10.

It is preferable that one single wire 40 is in contact with both of the two metal strands 32 located closest to the single wire 40. As a result, it is possible to more effectively improve the elongation resistance of the wire rope 10 described above, improve the water immersion resistance of the wire rope 10, and suppress the misalignment between the single wire 40 and the side strand 30. Further, the single wire 40 may be in point contact with the metal wire 32, but it is preferable that the single wire 40 is in surface contact with the metal wire 32. Here, in the present specification, the surface contact means that, in the cross section of the wire rope 10, the substantially linear portion of the single wire 40 and the substantially linear portion of the wire (metal wire 32, etc.) are partially. Or it means that they are in line contact as a whole. Since the single wire 40 and the side strand 30 (metal wire 32) are in surface contact with each other, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the wire rope 10 can withstand the above-mentioned resistance. Since the improvement of the extensibility can be obtained more effectively and the contact area between the single wire 40 and the side strand 30 (metal strand 32) is large, the water immersion resistance of the wire rope 10 can be improved and the single wire 40 and the side strand 30 can be improved. It is possible to more effectively suppress the misalignment with and.

In the example shown in FIG. 2, each part of the six single wires 40 (40A to 40F) is located inside the first virtual circumscribed circle M1 of each of the two side strands 30 adjacent to each other. , Meets the first requirement. Specifically, each part of the six single wires 40 (40A to 40F) is located inside the first virtual circumscribed circle M1 of one of the two side strands 30 adjacent to each other. The other part of the single wire 40 is located inside the first virtual circumscribed circle M1 of the other side strand 30 of the two side strands 30 adjacent to each other, and is the first requirement. Meet. Further, at least the single wires 40B to 40F satisfy the first requirement A and the first requirement B. For example, a part of the single wire 40F circumscribes both of the two metal strands 32 (

metal strands

32E and 32F in FIG. 2) located closest to the single wire 40F in one side strand 30. It is located on the central axis Q2 side of the side strand 30 from the virtual circumscribed line B1 of No. 1 (see also FIG. 3 described later). The two metal strands 32 (

metal strands

32E and 32F in FIG. 2) located closest to the single wire 40F are two metals arranged next to the single wire 40F without interposing other strands. It is a wire 32 (

metal wire

32E, 32F in FIG. 2). Of the plurality of single wires 40 included in the wire rope 10, 50% or more of the single wires 40 preferably satisfy the first requirement (further, the first requirement A and the first requirement B), and 80. It is preferable that a number of single wires 40 of% or more satisfy the first requirement (further, the first requirement A and the first requirement B).

(Relationship between one single wire 40 and two side strands 30)
It is preferable that the wire rope 10 of the present embodiment satisfies the following second requirement with respect to one single wire 40 and two side strands 30.
<Second requirement>
In at least one cross section of the wire rope 10, one side inside the radial direction of the wire rope 10 (the radial direction of the circle centered on the central axis Q1 of the wire rope 10) with respect to one single wire 40. The metal wire 32 constituting the strand 30 (hereinafter, referred to as "first metal wire 32X") and the metal wire 32 forming another side strand 30 (hereinafter, "second metal wire 32Y"). ") And are arranged adjacent to each other. A part of the single wire 40 is located between the first metal wire 32X and the second metal wire 32Y in the circumferential direction of the wire rope 10.
Here, the fact that a part of the single wire 40 is located between the first metal wire 32X and the second metal wire 32Y means that the first metal is centered on the central axis Q1 of the wire rope 10. Inside a second virtual circumscribed circle M2 that surrounds both the strands 32X and the second metal strands 32Y and circumscribes at least one of the first metal strands 32X and the second metal strands 32Y. In addition, it means that a part of the single wire 40 is located (see also FIG. 3 described later). In the wire rope 10, by satisfying the second requirement, the single wire 40 bites into the wire rope so as to be located between the first metal wire 32X and the second metal wire 32Y, and the two side strands. The gap existing between 30 is filled. Therefore, according to the present embodiment, the filling rate of the wire rope 10 can be increased as compared with the configuration in which the single wire 40 is not located between the first metal wire 32X and the second metal wire 32Y. As a result, the elongation resistance of the wire rope 10 can be improved more effectively.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following second requirement A with respect to one single wire 40 and two side strands 30.
<Second requirement A>
In at least one cross section of the wire rope 10, a part of at least one single wire 40 is a second virtual circumscribed line B2 that circumscribes both the first metal wire 32X and the second metal wire 32Y. Therefore, it is located on the central axis Q1 side of the wire rope 10.
Here, the second virtual circumscribed line B2 is on the single wire 40 side of the two virtual straight lines that are in contact with each other so as to straddle both the first metal wire 32X and the second metal wire 32Y. It is a virtual straight line located. The second requirement A means that the degree of biting of one single wire 40 between the first metal wire 32X and the second metal wire 32Y is larger than that of the second requirement described above. To do. In the wire rope 10, by satisfying the second requirement A, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the filling rate of the wire rope 10 can be further increased. Therefore, the elongation resistance of the wire rope 10 can be improved more effectively.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following second requirement B with respect to one single wire 40 and two side strands 30.
<Second requirement B>
In at least one cross section of the wire rope 10, at least one single wire 40 is in contact with at least one of the first metal wire 32X and the second metal wire 32Y.
In the wire rope 10, by satisfying the second requirement B, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the filling rate of the wire rope 10 can be further increased. Therefore, the elongation resistance of the wire rope 10 can be improved more effectively. Further, since the single wire 40 and the side strand 30 (

metal strands

32X, 32Y) are in contact with each other, it is possible to prevent liquid from entering the inside of the wire rope 10 through the gap between the single wire 40 and the side strand 30. Therefore, the water immersion resistance of the wire rope 10 can be improved. Further, since the single wire 40 and the side strand 30 are in contact with each other, it is possible to suppress the axial displacement of the wire rope 10 between the single wire 40 and the side strand 30 due to the deformation of the wire rope 10.

It is preferable that one single wire 40 is in contact with both the first metal wire 32X and the second metal wire 32Y. As a result, it is possible to more effectively improve the elongation resistance of the wire rope 10 described above, improve the water immersion resistance of the wire rope 10, and suppress the misalignment between the single wire 40 and the side strand 30. Further, the single wire 40 may be in point contact with the first metal wire 32X or the second metal wire 32Y, but is in surface contact with the first metal wire 32X or the second metal wire 32Y. It is preferable to do. Since the single wire 40 and the

metal strands

32X and 32Y are in surface contact with each other, the gap existing between the two side strands 30 adjacent to each other is further filled, so that the elongation resistance of the wire rope 10 described above is improved. The improvement can be achieved more effectively, and since the contact area between the single wire 40 and the side strands 30 (

metal strands

32X, 32Y) is large, the water immersion resistance of the wire rope 10 can be improved and the single wire 40 and the side strands can be improved. It is possible to more effectively suppress the misalignment with 30.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following second requirement C with respect to one single wire 40 and two side strands 30.
<Second requirement C>
In at least one cross section of the wire rope 10, the distance L1 between the pair of metal strands 32 located so as to sandwich the first single wire 40 in the circumferential direction in the side strands 30 of the first set is the second set. The distance between the pair of metal wire 32s located so as to sandwich the second single wire 40 in the circumferential direction is longer than the distance L2. Further, the number of metal strands 32 in contact with the first single wire 40 in the side strands 30 of the first set is in contact with the second single wire 40 in the side strands 30 in the second set. This is more than the number of metal strands 32. In the wire rope 10, by satisfying the second requirement C, the longer the distance between the pair of metal strands 32 sandwiching the single wire 40, the larger the number of metal strands 32 in contact with the single wire 40. As a result, the larger the gap existing between the two side strands 30 adjacent to each other, the more the gap existing between the two side strands 30 so that the single wire 40 comes into contact with many metal strands 32. It is buried. Therefore, according to the present embodiment, the number of metal wire 32s in contact with the single wire 40 is the same regardless of the size of the gap existing between the two side strands 30. The filling rate of the wire rope 10 can be increased, whereby the elongation resistance of the wire rope 10 can be improved.

It is preferable that the wire rope 10 of the present embodiment further satisfies the following second requirement D with respect to one single wire 40 and two side strands 30.
<Second requirement D>
In the first cross section of the wire rope, the distance between the pair of metal strands 32 located so as to sandwich the single wire 40 in the circumferential direction among the pair of side strands 30 adjacent to each other is the second of the wire rope 10. In the cross section (cross section at a position different from that of the first cross section in the axial direction of the wire rope 10), a pair of side strands 30 of the set of side strands 30 are located so as to sandwich the single wire 40 in the circumferential direction. It is longer than the distance between the metal wires 32. Further, in the first cross section, the number of metal strands 32 in contact with the single wire 40 in the set of side strands 30 is the single wire in the set of side strands 30 in the second cross section. This is more than the number of metal strands 32 in contact with 40. In the wire rope 10, by satisfying the second requirement D, the distance between the pair of metal strands 32 located so as to sandwich the single wire 40 in the circumferential direction among the common set of side strands 30 is the wire rope. 10 corresponds to an example of a first cross section (corresponding to an example of "the cross section" of claim 9) and a second cross section (corresponding to an example of "a cross section different from the cross section" of claim 9). ), And the longer the distance between the pair of metal wire 32s sandwiching the single wire 40, the larger the number of metal wire 32s in contact with the single wire 40. As a result, with respect to the common two side strands 30 and the single wire 40, the single wire 40 comes into contact with more metal strands 32 as the cross section where the gap existing between the two side strands 30 becomes larger. As described above, the gap existing between the two side strands 30 is filled. Therefore, according to the present embodiment, the number of metal strands 32 in contact with the single wire 40, although the gap existing between the two side strands 30 differs depending on the axial position of the wire rope 10. The filling rate of the wire rope 10 can be increased as compared with the configuration in which the wires rope 10 is the same, whereby the elongation resistance of the wire rope 10 can be improved.

In the example shown in FIG. 2, at least a part of each of the

single wires

40B, 40D, and 40F is located between the first metal wire 32X and the second metal wire 32Y in the circumferential direction of the wire rope 10. It meets the second requirement. Further, at least the

single wires

40B, 40D and 40F satisfy the second requirement A and the second requirement B. For example, a part of the single wire 40B is located on the central axis Q1 side of the wire rope 10 from the second virtual circumscribed line B2 that circumscribes both the first metal wire 32X and the second metal wire 32Y. (See also FIG. 3 below).

Further, a single wire 40 (40B, 40D, 40F) that satisfies the second requirement (second requirement A) and a single wire 40 (40A, 40C, 40E) that does not satisfy the second requirement (second requirement A). Are alternately arranged along the circumferential direction of the wire rope 10. As a result, the strength of the wire rope 10 is increased due to the uneven distribution of the single wire 40 satisfying the second requirement (second requirement A) and the single wire 40 not satisfying the second requirement (second requirement A). It is possible to suppress the occurrence of bias. Of the plurality of single wires 40 included in the wire rope 10, it is preferable that 30% or more of the single wires 40 satisfy the second requirement (furthermore, the second requirement A and the second requirement B). It is preferable that a number of single wires 40 of% or more satisfy the second requirement (further, the second requirement A and the second requirement B).

Further, in the example shown in FIG. 2, the distance L1 between the pair of metal strands 32 located so as to sandwich the first single wire 40B is between the pair of metal strands 32 located so as to sandwich the second single wire 40C. Distance is longer than L2. Further, the number of metal strands 32 in contact with the first single wire 40B is larger than the number of metal strands 32 in contact with the second single wire 40C. For example, the same relationship holds for the single wire 40F and the single wire 40A, and for the single wire 40D and the single wire 40E. In this way, in the wire rope 10, a plurality of side strands 30 are non-uniformly arranged in the circumferential direction, and the size of the gap between the side strands 30 of each set is also non-uniform, but the non-uniform gap is formed. The single wire 40 having a shape corresponding to the gap between the side strands 30 of each set is positioned so as to fill the gap. As a result, the filling rate of the wire rope 10 can be increased, and thus the elongation resistance of the wire rope 10 can be improved.

FIG. 3 is an explanatory view partially showing different cross-sectional configurations of the wire rope 10. FIG. 3A shows a cross-sectional configuration in the vicinity of the single wire 40B in the first cross section (same as the cross section of FIG. 2), and FIG. 3B shows a second cross section (the same as the cross section of FIG. 2). The first cross section is a cross section of the wire rope 10 at different positions in the axial direction) in the vicinity of the single wire 40B. As shown in FIG. 3, the distance L1 between the pair of metal strands 32 located so as to sandwich the single wire 40B in the circumferential direction in the first cross section sandwiches the single wire 40B in the circumferential direction in the second cross section. The distance between the pair of metal strands 32 located so as to be longer than L3. Further, in the first cross section, the number of metal strands 32 in contact with the single wire 40B is larger than the number of metal strands 32 in contact with the single wire 40B in the second cross section. As a result, the number of metal strands 32 in contact with the single wire 40B is the same even though the gap existing between the two side strands 30 differs depending on the axial position of the wire rope 10. In comparison, the filling rate of the wire rope 10 can be increased, whereby the elongation resistance of the wire rope 10 can be improved.

(Structural relationship between the single wire 40 and the metal strand 32 constituting the side strand 30)
The wire rope 10 of the present embodiment preferably satisfies the following third requirement with respect to the structure of the single wire 40 and the metal wire 32 constituting the side strand 30.
<Third requirement>
In at least one cross section of the wire rope 10, the cross-sectional area of one single wire 40 is larger than the cross-sectional area of each metal wire 32 constituting one side strand 30.
In the wire rope 10, by satisfying the third requirement, the strength of the wire rope 10 by the single wire 40 is increased as compared with the configuration in which the cross-sectional area of the single wire 40 is smaller than the cross-sectional area of the metal strand 32 constituting the side strand 30. Can be improved. Further, for example, when the wire rope 10 is formed or when the wire rope 10 is bent, the single wire 40 is more likely to bite between the metal strands 32, and the filling rate of the wire rope 10 can be increased, whereby the resistance of the wire rope 10 can be increased. It is possible to improve the extensibility more effectively.

In the present embodiment, the cross-sectional area of one single wire 40 is preferably equal to or less than the total cross-sectional area of the two metal strands 32. Further, it is preferable that the diameter of the virtual circumscribed circle of one single wire 40 is larger than the diameter of the virtual circumscribed circle of one metal wire 32. However, it is preferable that the diameter of the circumscribed circle of one single wire 40 is smaller than the diameter of the first virtual circumscribed circle M1 of one side strand 30. As a result, it is possible to suppress a decrease in the flexibility of the wire rope 10 due to the thickness of the single wire 40. Further, it is preferably 2 times or less the diameter of the virtual circumscribed circle of one metal wire 32, and more preferably 1.5 times or less the diameter of the virtual circumscribed circle of one metal wire 32. preferable.

The wire rope 10 of the present embodiment preferably satisfies the following third requirement A with respect to the structure of the single wire 40 and the metal wire 32 constituting the side strand 30.
<Third requirement A>
The tensile strength (N / mm ² ) of at least one single wire 40 is substantially the same as the tensile strength of each metal wire 32 constituting the side strand 30.
That is, the hardness of the single wire 40 is substantially the same as the hardness of each metal wire 32 constituting the side strand 30. Specifically, each of the tensile strength of the single wire 40 and the metal wires 32, for example, 1500 N / mm ² or more and 2500N / mm ² or less. The fact that the tensile strength of the single wire 40 and the metal strand 32 is substantially the same means that the difference in tensile strength between the two is ± 5% or less. The tensile strength of the single wire 40 and the metal wire 32 may be, for example, 1500 N / mm ² or more and 2000 N / N / mm ² or less.

In the example shown in FIG. 2, any cross-sectional area of the six single wires 40 (40A to 40F) is larger than the cross-sectional area of each metal wire 32 constituting one side strand 30, and satisfies the third requirement. ing. Further, the tensile strength of any of the six single wires 40 (40A to 40F) is substantially the same as the tensile strength of the side strand 30 (metal wire 32). Therefore, it can be seen that the single wire 40 and the metal wire 32 are deformed from each other and bite into the gap existing between the two side strands 30 adjacent to each other.

(Relationship between multiple single wires 40)
As shown in FIG. 2, each of the plurality of side strands 30 has an uneven shape (a shape different from that of a perfect circle, an ellipse, and an oval), and the shapes are different from each other. Therefore, the shapes of the gaps (recesses) between the two side strands 30 adjacent to each other are also different from each other, and each gap is different from the shape corresponding to the gap (either a perfect circle, an ellipse, or an oval). The single wire 40 deformed into the shape) is arranged so as to bite between the two side strands 30. As described above, in the wire rope 10 of the present embodiment, since the plurality of side strands 30 are unevenly arranged and the shapes of the plurality of side strands 30 are different from each other, the plurality of single wires 40 are also included. They are arranged non-uniformly and have different shapes. Hereinafter, a specific description will be given.

The wire rope 10 of the present embodiment preferably satisfies the following fourth requirement with respect to the plurality of single wires 40.
<Fourth requirement>
In at least one cross section of the wire rope 10, at least two single wires 40 have different diameters of the third virtual circumscribed circle M3 of the single wires 40.
<Fourth requirement A>
Separate from the circumferential distance of the pair of single wires 40 located across the one side strand 30 (the shortest circumferential distance of the wire rope 10 of the pair of single wires 40) in at least one cross section of the wire rope 10. It is different from the distance in the circumferential direction of the pair of single wires 40 located across the one side strand 30 of the above.

In the example shown in FIG. 2, the cross-sectional shapes of the six single wires 40 (40A to 40F) are different from each other. Further, at least, the diameter of the third virtual circumscribed circle M3 is different between the single wire 40A and the single wire 40C. Further, the distances of the six single wires 40 (40A to 40F) in the circumferential direction are different from each other. As described above, in the wire rope 10, the wire rope 10 is arranged so that the non-uniformly shaped single wire 40 bites between the plurality of side strands 30 arranged in the non-uniform shape and position. It is possible to increase the filling rate of the wire rope 10 and thereby improve the elongation resistance of the wire rope 10.

(Relationship of strands 30 on each side)
It is preferable that the wire rope 10 of the present embodiment satisfies the following fifth requirement with respect to the side strand 30.
<Fifth requirement>
The area of the first virtual circumscribed circle M1 of at least one side strand 30 of the two side strands 30 in which the single wire 40 is interposed in the circumferential direction of the wire rope 10 is all the metal elements constituting the side strand 30. It is smaller than the area of the fourth virtual circumscribed circle M4 of the virtual strand 30P when the line 32 is a perfect circle.
In the wire rope 10, by satisfying the fifth requirement, the area of the first virtual circumscribed circle M1 of the side strand 30 is the same as that of the fourth virtual circumscribed circle M4 of the virtual strand 30P. Since the gap between the metal strands 32 of the strand 30 is narrow, the elongation resistance of the wire rope 10 can be improved more effectively.

In the present embodiment, a plurality of side strands 30 are arranged along the circumferential direction of the wire rope 10 while being in contact with each other over the entire circumference. Further, all the side strands 30 are in contact with the core material 20. The contact between the side strands 30 may be point contact, but is preferably surface contact. Further, the contact between the side strand 30 and the core material 20 may be point contact, but is preferably surface contact.

FIG. 4 is an explanatory view showing a cross-sectional configuration of the side strand 30 and the virtual strand 30P. FIG. 4 (A) shows the cross-sectional configuration of the virtual strand 30P, and FIG. 4 (B) shows the cross-sectional configuration of the side strand 30. As will be described later, in the manufacturing process of the wire rope 10, the side strand 30 is secondary to the wire rope 10 before processing, such as swaging to make the side strand 30 deformed or wire drawing with a deformed die. By performing the processing, each metal wire 32P in the virtual strand 30P is deformed so as to be crushed. As shown in FIG. 3, the area (radius r1) of the first virtual circumscribed circle M1 of the side strand 30 is smaller than the area (radius r4) of the fourth virtual circumscribed circle M4 of the virtual strand 30P, and the fifth requirement. Meet.

The area of the third virtual circumscribed circle M3 of the single wire 40 shown in FIG. 2 is the area of the single wire when the single wire 40 is a perfect circle (when it is a perfect circle having the same area as the area of the single wire 40). The configuration may be larger than the area of the perfect circle). With such a configuration, the recess (gap) formed on the outer peripheral side of the wire rope 10 by the two side strands 30 adjacent to each other can be effectively filled (closed) by the single wire 40. Therefore, the gap between the plurality of metal strands 32 inside each side strand (each side strand) 30 can be more effectively filled (closed) by the plurality of metal strands 32. .. Therefore, the elongation resistance of the wire rope 10 can be improved more effectively. Further, since the liquid is suppressed from entering the core material 20 of the wire rope 10 from the gap between the single wire 40 and the side strand 30 or the gap between the metal strands 32 adjacent to the side strand 30, the durability of the wire rope 10 is maintained. The sex can be improved.

(Relationship between single wire 40 and core material 20)
As shown in FIG. 2, in at least one cross section of the wire rope 10, each single wire 40 is separated from the core material 20. Specifically, each single wire 40 is located outside the fifth virtual circumscribed circle M5 of the core material 20. Further, each single wire 40 is located outside the contact position of the two side strands 30 adjacent to each other in the radial direction of the wire rope 10. Further, one metal wire 22 constituting the core material 20 is arranged so as to face one single wire 40 via the contact position of the two adjacent side strands 30. With such a configuration, liquid is prevented from entering the core material 20 of the wire rope 10 through the gap between the single wire 40 and the side strand 30, so that the water immersion resistance of the wire rope 10 can be improved.

The wire rope 10 satisfying each of the above requirements can be manufactured as follows. A plurality of wire ropes 10 are twisted around the wire rope 10 together with a plurality of side strands 30. As a result, a plurality of side strands 30 are arranged so as to line up around the wire rope 10, and a single wire 40 is formed in a recess formed on the outer peripheral side of the wire rope 10 by the two side strands 30 adjacent to each other. A stranded wire in which is arranged is produced. The stranded wire is subjected to secondary processing such as swaging processing for deforming the side strand 30 and the single wire 40 and wire drawing processing using a deformed die. As a result, the core material 20, the side strands 30, and the single wire 40 are crushed inward in the radial direction of the wire rope 10, and as a result, the wire rope 10 described above is produced.

A-3. Effect of this embodiment:
As described above, in the wire rope 10 according to the present embodiment, the single wire 40 is arranged between each of the plurality of side strands 30 in the double stranded wire. Then, in at least one cross section of the wire rope 10, a part of at least one single wire 40 is a first virtual of at least one of two side strands 30 adjacent to each other along the circumferential direction of the wire rope 10. It is located inside the circumscribed circle M1 (first requirement above). As a result, the elongation resistance of the wire rope 10 can be improved while ensuring the flexibility of changing the shape of the wire rope 10.

B. Modification example:
The technique disclosed in the present specification is not limited to the above-described embodiment, and can be transformed into various forms without departing from the gist thereof. For example, the following modifications are also possible.

The configuration of the wire rope 10 in the above embodiment is merely an example and can be variously deformed. For example, the number of side strands 30 in the wire rope 10 of the above embodiment, the number of strands forming the side strands 30 and the core material 20, and the number of layers can be variously deformed. For example, the number of side strands 30 may be 3 or more. Further, although the wire rope 10 of the above embodiment includes the core material 20, the wire rope 10 has a configuration in which a plurality of side strands 30 and a plurality of single wires 40 are twisted to each other without the core material 20. May be good. Further, in the above embodiment, the core material 20 is a stranded wire in which a plurality of strands are twisted together, but it may be a single wire composed of one strand.

Further, the wire rope 10 has the above-mentioned first requirements A and B, a second requirement, a second requirement A to D, a third requirement, a third requirement A, a fourth requirement, and a fourth requirement. A, it is not necessary to meet at least one of the fifth requirements. For example, the tensile strength of the single wire 40 may be lower or higher than the tensile strength of each metal wire 32 constituting the side strand 30. If the tensile strength of the single wire 40 is lower than the tensile strength of the metal strand 32, the single wire 40 is the metal strand 32 of the two side strands 30 as compared with the configuration in which the tensile strength of the single wire 40 is equal to or higher than the tensile strength of the metal strand 32. Since it is easy to bite in between, it is possible to more effectively improve the elongation resistance of the wire rope 10.

The material of each member in the wire rope 10 of the above embodiment is merely an example and can be variously deformed. For example, the

metal strands

22 and 32 and the single wire 40 constituting the core material 20 and the side strand 30 may be formed of a metal other than stainless steel, or may be formed of a material other than metal (for example, resin). It may be.

10: Wire rope 20: Core material 22, 32 (32E, 32F, 32P): Metal wire 30: Side strand 30P: Virtual strand 32X: First metal wire 32Y: Second metal wire 40 (40A ~ 40F): Single line B1: 1st virtual circumscribed line B2: 2nd virtual circumscribed line M1: 1st virtual circumscribed circle M2: 2nd virtual circumscribed circle M3: 3rd virtual circumscribed circle M4: 4th virtual Circumscribed circle M5: Fifth virtual circumscribed circle Q1: Central axis Q2: Central axis

Claims

A wire rope comprising a plurality of strands twisted to each other, each of the plurality of strands having a structure in which a plurality of strands are twisted together.
It comprises a single wire arranged in a recess formed on the outer peripheral side of the wire rope by two strands adjacent to each other along the circumferential direction of the wire rope.
In the cross section of the wire rope, a part of the single wire is located inside the virtual circumscribed circle of one of the two strands.
Wire rope.
The wire rope according to claim 1.
In the cross section
The wire of one of the two strands and the wire of the other strand are arranged adjacent to each other inside the wire rope in the radial direction with respect to the single wire.
A part of the single wire is located between the strand of the one strand and the strand of the other strand in the circumferential direction.
Wire rope.
The wire rope according to claim 1 or 2.
In the cross section
The single wire is in contact with the wire of one of the two strands and the wire of the other strand, respectively.
Wire rope.
The wire rope according to any one of claims 1 to 3.
In the cross section, the cross-sectional area of the single wire is larger than the cross-sectional area of each of the strands constituting the strand.
Wire rope.
The wire rope according to any one of claims 1 to 4.
The tensile strength of the single wire is lower than the tensile strength of each of the strands constituting the strand.
Wire rope.
The wire rope according to any one of claims 1 to 4.
The tensile strength of the single wire is within ± 5% of the tensile strength of each of the strands constituting the strand.
Wire rope.
The wire rope according to any one of claims 1 to 6.
The area of the virtual circumscribed circle is smaller than the area of the virtual circumscribed circle of the virtual strand when all the strands constituting the one strand are perfect circles.
Wire rope.
The wire rope according to any one of claims 1 to 7.
A wire rope in which the area of the virtual circumscribed circle of the single wire is larger than the area of the single wire when the single wire is a perfect circle in the cross section.
The wire rope according to claim 1.
The single wire is formed by a first single wire arranged in a recess formed on the outer peripheral side of the wire rope by a first set of strands adjacent to each other and a wire by a second set of strands adjacent to each other. Including a second single wire arranged in a recess formed on the outer peripheral side of the rope,
In the cross section, the distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction is the pair of strands located so as to sandwich the second single wire in the circumferential direction. The number of the strands that are longer than the distance between the strands and are in contact with the first single wire among the strands of the first set is the second of the strands of the second set. More than the number of the strands in contact with the single wire of
Wire rope.
The wire rope according to claim 1.
The single wire comprises a first single wire arranged in a recess formed on the outer peripheral side of the wire rope by the first set of strands adjacent to each other.
The distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction in the cross section is such that the first single wire is sandwiched in the circumferential direction in a cross section different from the cross section. Among the first set of strands, the number of the strands that are longer than the distance between the pair of strands and are in contact with the first single wire in the cross section is different. More than the number of the strands in contact with the first single wire in the cross section of
Wire rope.
The wire rope according to claim 1.
The single wire is formed by a first single wire arranged in a recess formed on the outer peripheral side of the wire rope by a first set of strands adjacent to each other and a wire by a second set of strands adjacent to each other. Including a second single wire arranged in a recess formed on the outer peripheral side of the rope,
In the cross section, the distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction is the pair of strands located so as to sandwich the second single wire in the circumferential direction. The number of the strands that are longer than the distance between the strands and are in contact with the first single wire among the strands of the first set is the second of the strands of the second set. More than the number of the strands in contact with the single wire of
The distance between the pair of strands located so as to sandwich the first single wire in the circumferential direction in the cross section is such that the first single wire is sandwiched in the circumferential direction in a cross section different from the cross section. Among the first set of strands, the number of the strands that are longer than the distance between the pair of strands and are in contact with the first single wire in the cross section is different. More than the number of the strands in contact with the first single wire in the cross section of
Wire rope.
The wire rope according to any one of claims 1 to 11.
The shape of the cross section of the strand is different from any of a perfect circle, an ellipse, and an oval.
Wire rope.
The wire rope according to any one of claims 1 to 12.
The shape of the cross section of the single wire is different from any of a perfect circle, an ellipse, and an oval.
Wire rope.