Wire rope

Abstract

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 along the peripheral direction of the wire rope. In a 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.

1 . A wire rope comprising:
 a plurality of strands that are twisted with each other, the plurality of strands each having a configuration in which a plurality of element wires are twisted with each other; and   a single wire that is disposed in a recess section formed on an outer peripheral side of the twisted plurality of strands, the recess section being formed by two of the plurality of strands that are adjacent to each other along a peripheral direction of the wire rope;   wherein in a first transverse cross-section of the wire rope, a first portion of the single wire is positioned inside a virtual circumscribed circle of one of the two strands.   
     
     
         2 . The wire rope according to  claim 1 , wherein:
 in the first transverse cross-section, an element wire of the one of the two strands and an element wire of the other of the two strands are adjacently disposed further inward of the single wire in a radial direction of the wire rope, and   a second portion of the single wire is positioned between the element wire of the one strand and the element wire of the other strand in the peripheral direction.   
     
     
         3 . The wire rope according to  claim 1 , wherein in the first transverse cross-section:
 an element wire of the one of the two strands and an element wire of the other of the two strands are adjacently disposed further inward of the single wire in a radial direction of the wire rope, and   the single wire makes contact with each of (i) the element wire of the one of the two strands and (ii) the element wire of the other strand.   
     
     
         4 . The wire rope according to  claim 1 , wherein
 in the first transverse cross-section, a cross-sectional area of the single wire is larger than a cross-sectional area of each of the element wires constituting the strands.   
     
     
         5 . The wire rope according to  claim 1 , wherein
 a tensile strength of the single wire is lower than a tensile strength of each of the element wires constituting the strands.   
     
     
         6 . The wire rope according to  claim 1 , wherein
 a tensile strength of the single wire is within a range of ±5% of a tensile strength of each of the element wires constituting the strands.   
     
     
         7 . The wire rope according to  claim 1 , wherein
 an area of the virtual circumscribed circle of the one of the two strands is smaller than an area of a virtual circumscribed circle of a virtual strand in which all of the element wires constituting the virtual strand have the same cross-sectional area as the element wires of the one of the two strands but are perfectly circular.   
     
     
         8 . The wire rope according to  claim 1 , wherein
 in the first transverse cross-section, an area of a virtual circumscribed circle of the single wire is larger than an area of a virtual single wire having the same cross-sectional area as the single wire but being perfectly circular.   
     
     
         9 . The wire rope according to  claim 1 , comprising:
 a plurality of the recess sections, including:
 a first recess section formed by a first pair of strands that are adjacent to each other; and 
 a second recess section formed by a second pair of strands that are adjacent to each other; and 
   a plurality of the single wires, including:
 a first single wire that is disposed in the first recess section; and 
 a second single wire that is disposed in the second recess section, 
   wherein in the first transverse cross-section:
 a distance between a pair of element wires positioned so as to sandwich the first single wire in the peripheral direction is larger than a distance between a pair of element wires positioned so as to sandwich the second single wire in the peripheral direction, and 
 a number of element wires making contact with the first single wire is larger than a number of element wires making contact with the second single wire. 
   
     
     
         10 . The wire rope according to  claim 1 , wherein in the first transverse cross-section:
 a distance between a pair of element wires positioned so as to sandwich the first single wire in the peripheral direction is larger than a distance between a pair of element wires positioned so as to sandwich the first single wire in the peripheral direction in a second transverse cross-section different from the first transverse cross-section, and   the number of element wires making contact with the single wire in the first transverse cross-section is larger than the number of element wires making contact with the single wire in the second transverse cross-section.   
     
     
         11 . The wire rope according to  claim 1 , comprising:
 a plurality of the recess sections, including:
 a first recess section formed by a first pair of strands that are adjacent to each other; and 
 a second recess section formed by a second pair of strands that are adjacent to each other; and 
   a plurality of the single wires, including:
 a first single wire that is disposed in the first recess section, and 
 a second single wire that is disposed in the second recess section 
   wherein:
 in the first transverse cross-section:
 a distance between a first pair of element wires positioned so as to sandwich the first single wire in the peripheral direction is larger than a distance between a second pair of element wires positioned so as to sandwich the second single wire in the peripheral direction, and 
 a number of element wires making contact with the first single wire is larger than a number of element wires making contact with the second single wire, 
 
 in a second transverse cross-section different from the first transverse cross-section, the distance between the first pair of element wires is larger than the distance between the second pair of element wires, and 
 the number of element wires making contact with the first single wire in the first transverse cross-section is larger than a number of element wires making contact with the first single wire in the second transverse cross-section. 
   
     
     
         12 . The wire rope according to  claim 1 , wherein a shape of the element wires in a transverse cross-section is a shape that is different from a perfect circle, an ellipse, or an oval. 
     
     
         13 . The wire rope according to  claim 1 , wherein a shape of the single wire in a transverse cross-section is a shape that is different from a perfect circle, an ellipse, or an oval.