EP4019695A1 - Drahtseil - Google Patents

Drahtseil Download PDF

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Publication number
EP4019695A1
EP4019695A1 EP20855411.3A EP20855411A EP4019695A1 EP 4019695 A1 EP4019695 A1 EP 4019695A1 EP 20855411 A EP20855411 A EP 20855411A EP 4019695 A1 EP4019695 A1 EP 4019695A1
Authority
EP
European Patent Office
Prior art keywords
wire
wire rope
strands
single wire
element wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20855411.3A
Other languages
English (en)
French (fr)
Other versions
EP4019695A4 (de
Inventor
Yu Shinohara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Intecc Co Ltd
Original Assignee
Asahi Intecc Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Intecc Co Ltd filed Critical Asahi Intecc Co Ltd
Publication of EP4019695A1 publication Critical patent/EP4019695A1/de
Publication of EP4019695A4 publication Critical patent/EP4019695A4/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • D07B1/068—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the strand design
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1012—Rope or cable structures characterised by their internal structure
    • D07B2201/1014—Rope or cable structures characterised by their internal structure characterised by being laid or braided from several sub-ropes or sub-cables, e.g. hawsers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/104—Rope or cable structures twisted
    • D07B2201/1048—Rope or cable structures twisted using regular lay, i.e. the wires or filaments being parallel to rope axis
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2009—Wires or filaments characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2027—Compact winding
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3025—Steel
    • D07B2205/3028—Stainless steel
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/2005—Elongation or elasticity
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/2005—Elongation or elasticity
    • D07B2401/201—Elongation or elasticity regarding structural elongation
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/007—Making ropes or cables from special materials or of particular form comprising postformed and thereby radially plastically deformed elements

Definitions

  • the technique disclosed in the present specification relates to a wire rope.
  • Wire ropes can take forms such as so-called single-twisted and multi-twisted forms.
  • a single-twisted form is a form in which a plurality of single wires are twisted with each other
  • a multi-twisted form is a form in which a plurality of strands are twisted with each other, where each strand is constituted by a plurality of element wires that are twisted with each other.
  • Single-twisted wire ropes have a higher rigidity than multi-twisted wire ropes, which provides advantages such as a high elongation resistance of the wire rope, an example of which is a low initial elongation.
  • the initial elongation of a wire rope is the elongation that occurs in the initial stages of using a new wire rope.
  • the operability of a wire rope can decrease if the initial elongation of the wire rope is large, it is preferable that the initial elongation of the wire rope is small.
  • multi-twisted wire ropes have a lower rigidity than single-twisted wire ropes, the flexibility of shape changes is correspondingly higher, which provides advantages when the wire rope is used by being inserted inside a bent tube, such as a lower frictional resistance and higher slidability of the wire rope inside the tube.
  • filling wires and the like are disposed between each of the plurality of strands in a multi-twisted wire rope.
  • filling wires and the like filling wires or Ag strands
  • Patent Literature 1 and 2 techniques in which filling wires or Ag strands are disposed between each of the plurality of strands in a multi-twisted wire rope.
  • these conventional techniques by interposing the filling wires and the like between two strands that are adjacent to each other, the elongation resistance of the wire rope can be improved due to a higher filling rate of the wire rope (fewer gaps in the transverse cross-section of the wire rope). That is to say, according to these conventional techniques, an improvement in the elongation resistance of the wire rope can be expected while ensuring the flexibility of shape changes.
  • the technique disclosed herein can be achieved in various aspects including, for example, a wire rope and a method of manufacturing a wire rope.
  • FIG. 1 is a cross-sectional perspective view schematically showing the configuration of a wire rope 10 according to the present embodiment
  • FIG. 2 is an explanatory view showing a transverse cross-sectional configuration of the wire rope 10 according to the present embodiment.
  • the wire rope 10 of the present embodiment may be used in various applications (such as in bicycle brakes, and for operating an endoscope).
  • the wire rope 10 includes a core material 20, a plurality (or more specifically, six) side strands 30, and a plurality (or more specifically, six) single wires 40 (40A to 40F).
  • the core material 20 has a plurality of metallic element wires 22 that are twisted with each other. More specifically, the core material 20 has a configuration in which six metallic element wires 22 are twisted around one metallic element wire 22.
  • each of the metallic element wires 22 constituting the core material 20 is formed of stainless steel (such as SUS 304).
  • the plurality of side strands 30 are twisted with each other around the core material 20. That is to say, the plurality of side strands 30 are disposed side-by-side along the peripheral direction of the wire rope 10 (peripheral direction of a virtual circle centered on a central axis Q1 of the wire rope 10 (core material 20)).
  • the central axis Q1 is the center of a virtual circumscribed circle of the metallic element wire 22 positioned at the center of the core material 20.
  • the central axis Q1 is the center of a virtual circumscribed circle of the transverse cross-section of the element wire.
  • Each of the side strands 30 has a plurality of metallic element wires 32 that are twisted with each other.
  • each of the side strands 30 has a configuration in which six metallic element wires 32 are twisted around one metallic element wire 32.
  • each of the metallic element wires 32 constituting the side strands 30 is formed of stainless steel (such as SUS 304).
  • the side strands 30 are an example of a strand in the scope of the claims, and each of the metallic element wires 32 constituting the side strands 30 is an example of an element wire in the scope of the claims.
  • the plurality of single wires 40 are twisted around the core material 20 together with the side strands 30, and in the same direction as the side strands 30.
  • the single wire 40 is disposed in a recess section formed on the outer peripheral side of the wire rope 10 by two side strands 30 that are adjacent to each other along the peripheral direction of the wire rope 10. That is to say, the wire rope 10 is provided with the same number of single wires 40 as side strands 30.
  • each of the single wires 40 is constituted by one metallic element wire.
  • each of the single wires 40 is formed of stainless steel (such as SUS 304).
  • the wire rope 10 includes six side strands 30, there are six combinations of two side strands 30 that are adjacent to each other along the peripheral direction of the wire rope 10.
  • one single wire 40 is disposed with respect to each of the six combinations.
  • the core material 20 is Z-twisted
  • each of the side strands 30 is S-twisted
  • the plurality of side strands 30 and single wires 40 around the core material 20 are Z-twisted, but the twisting method and twisting direction of each wire is not limited to this. The details of the cross-sectional configuration of the wire rope 10 will be described below.
  • Condition 1 is satisfied with respect to one single wire 40 and one side strand 30.
  • a portion of at least one single wire 40 is positioned inside a first virtual circumscribed circle M1 of at least one of the side strands 30 among the two side strands 30 that are adjacent to each other along the peripheral direction of the wire rope 10.
  • the first virtual circumscribed circles M1 are perfect circles circumscribed on the side strands 30 (group of metallic element wires 32 constituting the side strands 30), and have the smallest radius of the perfect circles that enclose all of the metallic element wires 32 constituting one side strand 30.
  • Condition 1 indicates that one single wire 40 enters so as to be positioned between the metallic element wires 32 constituting one side strand 30.
  • the gap that exists between two side strands 30 is filled by a portion of the single wire 40 being positioned inside the first virtual circumscribed circles M1 of the side strands 30.
  • the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be improved (for example, the initial elongation is reduced).
  • a portion of one single wire 40 is positioned inside the first virtual circumscribed circles M1 of each of the two side strands 30 that are adjacent to each other in the peripheral direction of the wire rope 10.
  • one single wire 40 enters so as to be positioned between the metallic element wires 32 constituting each of the side strands 30.
  • Condition 1A is further satisfied with respect to one single wire 40 and one side strand 30.
  • At least a portion of one single wire 40 is positioned further on the central axis Q2 side of the side strand 30 than a first virtual circumscribed line B 1 that is circumscribed on both of the two metallic element wires 32 that, of the plurality of metallic element wires 32 that configure the one side strand 30, are positioned closest to the single wire 40.
  • the first virtual circumscribed line B1 is a virtual line that, of the two virtual straight lines that make contact so as to straddle both of the two metallic element wires 32 that are positioned closest to the single wire 40, is positioned on the single wire 40 side.
  • Condition 1A indicates that, compared to Condition 1 described above, one single wire 40 enters to greater extent with respect to one side strand 30.
  • the filling rate of the wire rope 10 can be further increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved.
  • Condition 1B below is further satisfied with respect to one single wire 40 and one side strand 30.
  • At least one single wire 40 makes contact with at least one of two metallic element wires 32 that, of the plurality of metallic element wires 32 that configure one side strand 30, are positioned closest to the single wire 40.
  • the filling rate of the wire rope 10 can be further increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved. Furthermore, as a result of the contact between the single wire 40 and the side strand 30, the entry of liquid into the wire rope 10 from the gap between the single wire 40 and the side strand 30 is suppressed, which enables the water immersion resistance of the wire rope 10 to be improved. Moreover, as a result of the contact between the single wire 40 and the side strand 30, it is possible to suppress displacement between the single wire 40 and the side strand 30 in the axial direction of the wire rope 10 due to a change in shape of the wire rope 10.
  • one single wire 40 makes contact with both of the two metallic element wires 32 that are positioned closest to the single wire 40.
  • the single wire 40 may be in a point contact with the metallic element wires 32, but preferably makes surface contact with each of the metallic element wires 32.
  • surface contact refers to a case where, in the transverse cross-section of the wire rope 10, a substantially straight section of the single wire 40 and a substantially straight section of the element wires (such as the metallic element wires 32) are in a partial or total line contact.
  • the gap that exists between two side strands 30 that are adjacent to each other is filled even further, which enables the improvement in the elongation resistance of the wire rope 10 described above to be more effectively obtained, and further, because the surface contact between the single wire 40 and the side strand 30 (metallic element wires 32) is large, it is possible improve the water immersion resistance of the wire rope 10, and suppress the displacement between the single wire 40 and the side strands 30 more effectively.
  • a portion of each of the six single wires 40 (40A to 40F) is positioned inside the first virtual circumscribed circles M1 of each of the two side strands 30 that are adjacent to each other, which satisfies Condition 1.
  • a portion of each of the six single wires 40 (40A to 40F) is positioned inside the first virtual circumscribed circle M1 of one of the two side strands 30 that are adjacent to each other, and another portion of the single wires 40 is positioned inside the first virtual circumscribed circle M1 of the other of the two side strands 30 that are adjacent to each other, which satisfies Condition 1.
  • at least the single wires 40B to 40F satisfy Condition 1A and Condition 1B described above.
  • the single wire 40F is positioned further on the central axis Q2 side of the side strand 30 than the first virtual circumscribed line B 1 that is circumscribed on both of the two metallic element wires 32 (metallic element wires 32E and 32F in FIG. 2 ) of one side strand 30 that are positioned closest to the single wire 40F (see also FIG. 3 described below).
  • the two metallic element wires 32 positioned closest to the single wire 40F are the two metallic element wires 32 (metallic element wires 32E and 32F in FIG. 2 ) disposed next to the single wire 40F without interposing other element wires.
  • the wire rope 10 it is preferable that 50% or more of the total number of single wires 40 satisfy Condition 1 (and also Condition 1A and Condition 1B), and it is preferable that 80% or more of the total number of single wires 40 satisfy Condition 1 (and also Condition 1A and Condition 1B).
  • Condition 2 is satisfied with respect to one single wire 40 and two side strands 30.
  • first metallic element wire 32X constituting one side strand 30
  • second metallic element wire 32Y metallic element wire 32 constituting another side strand 30
  • a portion of the single wire 40 being positioned between the first metallic element wire 32X and the second metallic element wire 32Y means that a portion of the single wire 40 is positioned inside a second virtual circumscribed circle M2, which is centered on the central axis Q1 of the wire rope 10, encloses both the first metallic element wire 32X and the second metallic element wire 32Y, and is circumscribed on at least one of the first metallic element wire 32X and the second metallic element wire 32Y (see also FIG. 3 below).
  • the gap that exists between two side strands 30 is filled as a result of the single wire 40 entering so as to be positioned between the first metallic element wire 32X and the second metallic element wire 32Y.
  • the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved.
  • Condition 2A is further satisfied with respect to one single wire 40 and two side strands 30.
  • At least a portion of one single wire 40 is positioned further on the central axis Q1 side of the wire rope 10 than a second virtual circumscribed line B2 that is circumscribed on both the first metallic element wire 32X and the second metallic element wire 32Y.
  • the second virtual circumscribed line B2 is a virtual straight line that, of the two virtual straight lines that make contact so as to straddle both the first metallic element wire 32X and the second metallic element wire 32, are positioned on the single wire 40 side.
  • Condition 2A indicates that, compared to Condition 2 described above, one single wire 40 enters to a greater extent between the first metallic element wire 32X and the second metallic element wire 32Y.
  • the filling rate of the wire rope 10 can be further increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved.
  • Condition 2B below is further satisfied with respect to one single wire 40 and two side strands 30.
  • At least one single wire 40 makes contact with at least one of the first metallic element wire 32X and the second metallic element wire 32Y.
  • the filling rate of the wire rope 10 can be further increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved. Furthermore, as a result of the contact between the single wire 40 and the side strands 30 (metallic element wires 32X and 32Y), the entry of liquid into the wire rope 10 from the gap between the single wire 40 and the side strand 30 is suppressed, which enables the water immersion resistance of the wire rope 10 to be improved. Moreover, as a result of the contact between the single wire 40 and the side strands 30, it is possible to suppress displacement between the single wire 40 and the side strands 30 in the axial direction of the wire rope 10 due to a change in shape of the wire rope 10.
  • one single wire 40 makes contact with both the first metallic element wire 32X and the second metallic element wire 32Y.
  • the single wire 40 may be in a point contact with the first metallic element wire 32X and the second metallic element wire 32Y, but preferably makes surface contact with the first metallic element wire 32X and the second metallic element wire 32Y.
  • the gap that exists between the two side strands 30 that are adjacent to each other is filled even further, which enables the elongation resistance of the wire rope 10 described above to be more effectively improved, and further, because the surface contact between the single wire 40 and the side strands 30 (metallic element wires 32X and 32Y) is large, it is possible to improve the water immersion resistance of the wire rope 10, and suppress the displacement between the single wire 40 and the side strands 30 more effectively.
  • Condition 2C is further satisfied with respect to one single wire 40 and two side strands 30.
  • a distance L1 between a pair of metallic element wires 32 positioned so as to sandwich a first single wire 40 in the peripheral direction with a first group of side rands 30 is larger than a distance L2 between a pair of metallic element wires 32 positioned so as to sandwich the second single wire 40 in the peripheral direction with a second group of side strands 30.
  • the number of metallic element wires 32 of the first group of side strands 30 making contact with the first single wire 40 is larger than the number of metallic element wires 32 of the second group of side strands 30 making contact with the second single wire 40.
  • the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be improved.
  • Condition 2D is further satisfied with respect to one single wire 40 and two side strands 30.
  • the distance in a first transverse cross-section of the wire rope between a pair of metallic element wires 32, which are in one group of side strands 30 that are adjacent to each other, that are positioned so as to sandwich the single wire 40 in the peripheral direction is larger than the distance in a second transverse cross-section of the wire rope 10 (a transverse cross-section taken in a different position to the first cross-section in the axial direction of the wire rope 10) between a pair of metallic element wires 32, which are in the one group of side strands 30, that are positioned so as to sandwich the single wire 40 in the peripheral direction.
  • the number of metallic element wires 32 in one group of side strands 30 making contact with the single wire 40 in the first transverse cross-section is larger than the number of metallic element wires 32 in the one group of side strands 30 making contact with the single wire 40 in the second transverse cross-section.
  • the gap that exists between the two side strands 30 becomes larger in the transverse cross-section, the gap that exists between the two side strands 30 is filled such that the single wire 40 makes contact with a larger number of metallic element wires 32. Therefore, according to the present embodiment, compared to a configuration in which the number of metallic element wires 32 making contact with the single wire 40 is the same despite the gap that exists between the two side strands 30 being different depending on the axial direction position of the wire rope 10, the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be improved.
  • each of at least the single wires 40B, 40D, and 40F is positioned between the first metallic element wire 32X and the second metallic element wire 32Y in the peripheral direction of the wire rope 10, which satisfies Condition 2. Furthermore, at least the single wires 40B, 40D, and 40F satisfy Condition 2A and Condition 2B described above. For example, a portion of the single wire 40B is positioned further on the central axis Q1 side of the wire rope 10 than the second virtual circumscribed line B2 that is circumscribed on both the first metallic element wire 32X and the second metallic element wire 32Y (see also FIG. 3 described below).
  • the single wires 40 (40B, 40D, and 40F) that satisfy Condition 2 (Condition 2A), and the single wires 40 (40A, 40C, and 40E that do not satisfy Condition 2 (Condition 2A) are alternately arranged along the peripheral direction of the wire rope 10. As a result, it is possible to suppress the occurrence of a bias in the strength of the wire rope 10 caused by an uneven distribution of the single wires 40 that satisfy Condition 2 (Condition 2A) and the single wires 40 that do not satisfy Condition 2 (Condition 2A).
  • the wire rope 10 it is preferable that 30% or more of the total number of single wires 40 satisfy Condition 2 (and also Condition 2A and Condition 2B), and it is preferable that 50% or more of the total number of single wires 40 satisfy Condition 2 (and also Condition 2A and Condition 2B).
  • the distance L1 between a pair of metallic element wires 32 positioned so as to sandwich the first single wire 40B is larger than the distance L2 between a pair of metallic element wires 32 positioned so as to sandwich the second single wire 40C.
  • the number of metallic element wires 32 making contact with the first single wire 40B is larger than the number of metallic element wires 32 making contact with the second single wire 40C. Note that, for example, the same relationship is established between the single wire 40F and the single wire 40A, and the single wire 40D and the single wire 40E.
  • the plurality of side strands 30 are unevenly arranged in the peripheral direction, and even though the size of the gaps in each group of side strands 30 is also uneven, single wires 40 having a shape corresponding to the gaps of each group of side strands 30 are positioned so as enter and fill the uneven gaps.
  • the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be improved.
  • FIG. 3 is an explanatory view partially showing different transverse cross-sectional configurations of the wire rope 10.
  • a transverse cross-sectional configuration near the single wire 40B in a first transverse cross-section is shown
  • a transverse cross-sectional configuration near the single wire 40B in a second transverse cross-section is shown in FIG. 3(B)
  • a transverse cross-sectional configuration near the single wire 40B in a second transverse cross-section is shown.
  • FIG. 3(A) a transverse cross-sectional configuration near the single wire 40B in a first transverse cross-section (the same transverse cross-section as FIG. 2 )
  • a transverse cross-sectional configuration near the single wire 40B in a second transverse cross-section is shown in a different position than the first cross-section in the axial direction of the wire rope 10.
  • the distance L1 in the first transverse cross-section between a pair of metallic element wires 32 positioned so as to sandwich the single wire 40B in the peripheral direction is larger than a distance L3 in the second transverse cross-section between a pair of metallic element wires 32 positioned so as to sandwich the single wire 40B in the peripheral direction.
  • the number of metallic element wires 32 making contact with the single wire 40B in the first transverse cross-section is larger than the number of metallic element wires 32 making contact with the single wire 40B in the second transverse cross-section.
  • the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be improved.
  • Condition 3 is satisfied with respect to the structure of the single wire 40 and the metallic element wires 32 constituting the side strands 30.
  • the cross-sectional area of one single wire 40 is larger than the cross-sectional area of each of the metallic element wires 32 constituting one side strand 30.
  • the strength of the wire rope 10 can be improved by the single wire 40.
  • the single wire 40 can more easily enter between the metallic element wires 32 when the wire rope 10 is formed and when the wire rope 10 is bent, and therefore, the filling rate of the wire rope 10 can be increased, which enables the elongation resistance of the wire rope 10 to be more effectively improved.
  • the cross-sectional area of one single wire 40 is preferably less than or equal to the sum of the cross-sectional areas of two metallic element wires 32.
  • the diameter of the virtual circumscribed circle of one single wire 40 is preferably larger than the diameter of the virtual circumscribed circle of one metallic element wire 32.
  • the diameter of the circumscribed circle of one single wire 40 is preferably smaller than the diameter of the first virtual circumscribed circle M1 of one side strand 30. As a result, a decrease in the flexibility of the wire rope 10 caused by the thickness of the single wire 40 can be suppressed.
  • the diameter is preferably two times or less than the diameter of the virtual circumscribed circle of one metallic element wire 32, and more preferably 1.5 times or less than the diameter of the virtual circumscribed circle of one metallic element wire 32.
  • Condition 3A is satisfied with respect to the structure of the single wire 40 and the metallic element wires 32 constituting the side strands 30.
  • the tensile strength (N/mm 2 ) of at least one single wire 40 is substantially equal to the tensile strength of each of the metallic element wires 32 constituting the side strands 30.
  • the hardness of the single wire 40 is substantially equal to the hardness of each of the metallic element wires 32 constituting the side strands 30.
  • the tensile strength of each of the single wire 40 and the metallic element wires 32 is, for example, 1,500 N/mm 2 or more and 2,500 N/mm 2 or less.
  • the tensile strength of the single wire 40 and the metallic element wires 32 being substantially equal means that the difference in the tensile strength between them is less than ⁇ 5%.
  • the tensile strength of each of the single wire 40 and the metallic element wires 32 may be, for example, 1,500 N/mm 2 or more and 2,000 N/mm 2 or less.
  • the cross-sectional area of each of the six single wires 40 (40A to 40F) is larger than the cross-sectional area of each of the metallic element wires 32 constituting one side strand 30, which satisfies Condition 3. Furthermore, the tensile strength of each of the six single wires 40 (40A to 40F) is substantially equal to the tensile strength of the side strands 30 (metallic element wires 32). As a result, it can be seen that the single wire 40 changes shape with the metallic element wires 32, and enter the gap that exists between the two side strands 30 that are adjacent to each other.
  • the plurality of side strands 30 each have an irregular shape (a shape different from a perfect circle, an ellipse, or an oval), and the shapes are different from each other. Therefore, the shapes of the gaps (recess sections) between two side strands 30 that are adjacent to each other are all different from each other, and each of the gaps has a single wire 40 that has changed shape into a shape that corresponds to the gap (a shape different from a perfect circle, an ellipse, or an oval), and which is disposed so as to enter between the two side strands 30.
  • the plurality of side strands 30 are unevenly disposed, and the shapes of the plurality of side strands 30 are different from each other, the plurality of single wires 40 are also unevenly disposed, and the shapes are different from each other. This is described in detail below.
  • At least two single wires 40 have a third virtual circumscribed circle M3 of the single wire 40 having different diameters from each other.
  • the distance in the peripheral direction of a pair of single wires 40 positioned so as to sandwich one side strand 30 (the shortest distance between the pair of single wires 40 in the peripheral direction of the wire rope 10) and the distance in the peripheral direction of a pair of single wires 40 positioned so as to sandwich another side strand 30 are different.
  • the cross-sectional shapes of the six single wires 40 are different from each other.
  • the third virtual circumscribed circles M3 of at least the single wire 40A and the 40C have different diameters.
  • the area of the first virtual circumscribed circle M1 of at least one of the two side strands 30 between which the single wire 40 is disposed is smaller than a fourth virtual circumscribed circle M4 of a virtual strand 30P in a case where all of the metallic element wires 32 constituting the side strand 30 are perfectly circular.
  • the elongation resistance of the wire rope 10 can be more effectively improved by an amount corresponding to the extent in which the gap between the metallic element wires 32 of the side strand 30 is narrowed.
  • the plurality of side strands 30 are disposed along the peripheral direction of the wire rope 10 such that they make contact with each other, and are disposed over the entire periphery. Furthermore, all of the side strands 30 make contact with the core material 20.
  • the contact between the side strands 30 may be a point contact, but is preferably a surface contact.
  • the contact between the side strands 30 and the core material 20 may be a point contact, but is preferably a surface contact.
  • FIG. 4 is an explanatory view showing transverse cross-sectional configurations of the side strand 30 and the virtual strand 30P.
  • FIG. 4(A) shows the transverse cross-sectional configuration of the virtual strand 30P
  • FIG. 4(B) shows the transverse cross-sectional configuration of the side strand 30.
  • the side strands 30 have the metallic element wires 32P in the virtual strand 30P deformed such that they are flattened.
  • 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, which satisfies Condition 5.
  • the area of a third virtual circumscribed circles M3 of the single wires 40 shown in FIG. 2 may be configured to be larger than the area of the single wires (area of the perfect circles) when the single wires 40 are perfectly circular (perfect circles circle having the same area as the area of the single wires 40).
  • the elongation resistance of the wire rope 10 can be more effectively improved. Furthermore, the entry of liquid into the core material 20 of the wire rope 10 from the gaps between the single wires 40 and the side strands 30 or the gaps between adjacent metallic element wires 32 in the side strands 30 is suppressed, which enables the durability of the wire rope 10 to be improved.
  • each of the single wires 40 is separated from the core material 20. Specifically, each of the single wires 40 is positioned outside a fifth virtual circumscribed circle M5 of the core material 20. Furthermore, each of the single wires 40 is positioned further outward in the radial direction of the wire rope 10 than the contact position of the two side strands 30 that are adjacent to each other. Moreover, one metallic element wire 22 constituting the core material 20 is disposed so as to face the one single wire 40 via the contact position of the two side strands 30 that are adjacent to each other. As a result of such a configuration, the entry of liquid into the core material 20 the wire rope 10 from the gap between the single wire 40 and the side strands 30 is suppressed, which enables the water immersion resistance of the wire rope 10 to be improved.
  • the wire rope 10 that satisfies the each of the conditions described above can be produced as follows.
  • a plurality of wire ropes 10 are twisted together with a plurality of side strands 30 around a wire rope 10.
  • the plurality of side strands 30 are disposed side by side around the wire rope 10, and a twisted wire is produced in which the single wires 40 are disposed in recess sections formed on the outer peripheral side of the wire rope 10 by two side strands 30 that are adjacent to each other.
  • the twisted wire is subjected to secondary processing such as swaging processing for deforming the side strands 30 and the single wires 40, or wire drawing processing using a deforming die.
  • secondary processing such as swaging processing for deforming the side strands 30 and the single wires 40, or wire drawing processing using a deforming die.
  • the core material 20, the side strands 30, and the single wires 40 are inwardly flattened in the radial direction of the wire rope 10, and as a result, the wire rope
  • single wires 40 are disposed between each of the plurality of side strands 30 in the multi-twisted wire. Further, in at least one transverse cross-section of the wire rope 10, at least a portion of one single wire 40 is positioned inside the first virtual circumscribed circle M1 of at least one of the two side strands 30 that are adjacent to each other in the peripheral direction of the wire rope 10 (Condition 1 described above). This makes it possible to improve the elongation resistance of the wire rope 10 while ensuring the flexibility of shape changes in the wire rope 10.
  • the configuration of the wire rope 10 in the embodiment described above is thoroughly an example, and can be modified in various ways.
  • the number of side strands 30 in the wire rope 10 of the above embodiment, and the number of element wires and number of layers constituting the side strands 30 and the core material 20 can be changed in various ways.
  • the number of side strands 30 may be three or more.
  • the wire rope 10 of the above embodiment includes the core material 20, it is also possible to use a configuration in which a plurality of side strands 30 and a plurality of single wires 40 are twisted with each other without providing the core material 20.
  • the core material 20 is a twisted wire in which a plurality of element wires are twisted together, it may also be a single wire constituted by a single element wire.
  • the wire rope 10 does not have to satisfy at least one of Conditions 1A and 1B, Condition 2, Conditions 2A to 2D, Condition 3, Condition 3A, Condition 4, Condition 4A, and Condition 5.
  • the tensile strength of the single wires 40 may be higher or lower than the tensile strength of each of the metallic element wires 32 constituting the side strands 30.
  • the single wires 40 becomes enter between the metallic element wires 32 of the two side strands 30 more easily, which enables the elongation resistance of the wire rope 10 to be more effectively improved.
  • each member of the wire rope 10 of the embodiment described above is thoroughly an example, and can be modified in various ways.
  • the metallic element wires 22 and 32 constituting the core material 20 and the side strands 30, and the single wire 40 may be formed of a metal other than stainless steel, and may be formed of a material other than a metal (such as a resin).

Landscapes

  • Ropes Or Cables (AREA)
EP20855411.3A 2019-08-22 2020-07-28 Drahtseil Withdrawn EP4019695A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019152317 2019-08-22
PCT/JP2020/028833 WO2021033497A1 (ja) 2019-08-22 2020-07-28 ワイヤロープ

Publications (2)

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EP4019695A1 true EP4019695A1 (de) 2022-06-29
EP4019695A4 EP4019695A4 (de) 2023-09-13

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EP20855411.3A Withdrawn EP4019695A4 (de) 2019-08-22 2020-07-28 Drahtseil

Country Status (4)

Country Link
US (1) US20220170204A1 (de)
EP (1) EP4019695A4 (de)
JP (1) JP7138251B2 (de)
WO (1) WO2021033497A1 (de)

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Publication number Priority date Publication date Assignee Title
US2241955A (en) * 1940-07-16 1941-05-13 Wickwire Spencer Steel Company Metallic rope and cable
NL242191A (de) * 1958-08-14 1900-01-01
GB998266A (en) * 1961-05-05 1965-07-14 Alfred Dietz Improvements in stranded spiral ropes
JPS5218829B2 (de) * 1972-01-14 1977-05-24
US4311001A (en) * 1978-12-08 1982-01-19 Glushko Mikhail F Method for manufacturing twisted wire products and product made by this method
JPS60177995U (ja) * 1984-09-26 1985-11-26 神鋼鋼線工業株式会社 ワイヤロ−プ
US5048280A (en) * 1988-12-27 1991-09-17 Sumimoto Electric Industries, Ltd. Steel composite cord
JP2761794B2 (ja) * 1990-06-08 1998-06-04 東京製綱株式会社 ケーブルレイドロープ
JPH07138923A (ja) 1993-11-15 1995-05-30 Igeta Seiko Kk ガードロープ
GB2324542A (en) * 1997-04-25 1998-10-28 Bridon Plc Rope with additional reinforcing members
US6049042A (en) 1997-05-02 2000-04-11 Avellanet; Francisco J. Electrical cables and methods of making same
JP4064668B2 (ja) * 2001-12-26 2008-03-19 東京製綱株式会社 複合型ワイヤロープ
US20080296546A1 (en) * 2007-06-01 2008-12-04 Peter Bergendahl Cable for use in safety barrier
JP5806644B2 (ja) * 2012-05-31 2015-11-10 東京製綱株式会社 ハイブリッド心ロープ
JP6077941B2 (ja) * 2013-06-07 2017-02-08 株式会社日立製作所 エレベータ用ワイヤロープ
KR101752686B1 (ko) * 2014-11-11 2017-07-11 주식회사 디에스글로벌이씨엠 내부식성이 향상된 구조 보강용 강연선 및 그 제조 방법
JP7286410B2 (ja) 2019-05-21 2023-06-05 東京製綱株式会社 ワイヤロープ、ワイヤロープの端部処理方法、及び、螺旋部材

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JPWO2021033497A1 (de) 2021-02-25
EP4019695A4 (de) 2023-09-13
WO2021033497A1 (ja) 2021-02-25
US20220170204A1 (en) 2022-06-02
JP7138251B2 (ja) 2022-09-15

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