Rope with corrosion resistance and bending endurance characteristics
AssigneeNippon Cable System Inc.
InventorsHiroaki Furukawa, Sadahiro Onimaru, Yukio Narita
Life of this patent
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Abstract
A rope comprising a plurality of wires (2, 3, 4) made of a steel wire being twisted together; at least the wires which are arranged in such a manner as to be disposed on an outer surface of the rope (1) being made of a plated steel wire wherein a corrosion resistance is superior; at least said wires which are located in a center of the rope not being made of the wire wherein the corrosion resistance is superior.
Claims15
A rope, comprising a plurality of wires made of a steel wire being twisted together, wherein at least said wires which are arranged in such a manner as to be disposed on an outer surface of the rope are made of a steel wire and have corrosion resistance, wherein at least said wire which is located in a center of the rope is made of a wire having corrosion resistance, and wherein the corrosion resistance of said wires disposed on said outer surface of the rope is higher than the corrosion resistance of said wire located in the center of the rope,
- wherein said plurality of wires disposed on said outer surface of the rope is arranged so as to have a predetermined range of tightening percentage, said tightening percentage being defined as:
- ##EQU6## wherein said plurality of wires disposed on said outer surface of the rope is arranged so as to have a predetermined range of preforming percentage, said preforming percentage being defined as:
- ##EQU7## wherein D:
- measured outer diameter of a rope, and
- T:
- wave diameter when the wire is loosed, and
- wherein said predetermined range of tightening percentage is between 4 and 11%, and wherein said predetermined range of preforming percentage is between 65 and 90%.
A rope, comprising a plurality of wire strands, wherein the plurality of wire strands are closed in an abutting relationship, and a tightening percentage thereof is in the range of between 4 and 11% and a preforming percentage thereof is in the range of between 65 and 90%,
- wherein said plurality of wires disposed on said outer surface of the rope is arranged so as to have a predetermined range of tightening percentage, said tightening percentage being defined as:
- ##EQU8## and wherein said plurality of wires disposed on said outer surface of the rope is arranged so as to have a predetermined range of preforming percentage, said preforming percentage being defined as:
- ##EQU9## wherein D:
- measured outer diameter of a rope, and
- T:
- wave diameter when the wire is loosed.
A rope, comprising a plurality of wires made of a steel wire being twisted together, wherein at least said wires which are arranged in such a manner as to be disposed on an outer surface of the rope are made of a steel wire and have corrosion resistance, wherein at least said wire which is located in a center of the rope is made of a wire having corrosion resistance, and wherein the corrosion resistance of said wires disposed on said outer surface of the rope is higher than the corrosion resistance of said wire located in the center of the rope,
- wherein said plurality of wires disposed on said outer surface of the rope is arranged so as to have a predetermined range of preforming percentage, said preforming percentage being defined as:
- ##EQU10## wherein D:
- measured outer diameter of a rope, and
- T:
- wave diameter when the wire is loosed, and
- wherein said predetermined range of preforming percentage is between 65 and 90%.
Dependencies are inferred from the claim text.