Wire rope for elevator, and method for repairing elevator
AssigneeMitsubishi Electric Building Solutions Corporation
InventorsMasahiko HIDA, Haruki TAKAOKA, Junya YASUTOMI
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Abstract
In a wire rope for an elevator, each side strand includes: a core wire; and at least one wire layer arranged around an outer periphery of the core wire. The number of the at least one wire layer is two or less. The at least one wire layer includes an outer layer being in contact with an outer periphery of a rope core. The outer layer includes a plurality of outer wires. A ratio of a sectional area of the plurality of outer wires included in each of the strands to a total sectional area of each of the strands is 60% or less. The rope core includes: a central steel wire; and a core outer-peripheral layer arranged around an outer periphery of the central steel wire.
Claims16
A wire rope for an elevator, comprising:
- a rope core;
- and
- a plurality of side strands made of steel and arranged around an outer periphery of the rope core,
- wherein each of the side strands includes:
- a core wire;
- and
- at least one wire layer arranged around an outer periphery of the core wire,
- wherein the number of the at least one wire layer is two or less,
- wherein the at least one wire layer includes an outer layer being in contact with the outer periphery of the rope core,
- wherein the outer layer includes a plurality of outer wires,
- wherein a ratio of a sectional area of the plurality of outer wires included in each of the side strands to a total sectional area of each of the side strands is 60% or less, and
- wherein the rope core includes:
- a central steel wire arranged in a center of the rope core;
- and
- a core outer-peripheral layer arranged around an outer periphery of the central steel wire.
A method of renovating an elevator, comprising a step of replacing an existing wire rope for an elevator with a new wire rope for an elevator,
- wherein the existing wire rope for an elevator and the new wire rope for an elevator each include:
- a rope core;
- and a plurality of side strands made of steel and arranged around an outer periphery of the rope core,
- wherein the side strands in the existing wire rope for an elevator and the side strands in the new wire rope for an elevator each include a plurality of element wires,
- wherein the plurality of element wires include a plurality of outer wires forming an outer layer being in contact with the rope core,
- wherein the number of the outer wires in each of the side strands of the new wire rope for an elevator is larger than the number of the outer wires in each of the side strands of the existing wire rope for an elevator,
- wherein an occupancy ratio of the plurality of outer wires in cross section to each of the side strands of the new wire rope for an elevator is lower than an occupancy ratio of the plurality of outer wires in cross section to each of the side strands of the existing wire rope for an elevator,
- wherein tensile strength of each of the element wires in each of the side strands of the new wire rope for an elevator except for the plurality of outer wires is higher than tensile strength of each of the element wires in each of the side strands of the existing wire rope for an elevator except for the plurality of outer wires, and
- wherein the rope core in the new wire rope for an elevator includes:
- a central steel wire;
- and a core outer-peripheral layer arranged around an outer periphery of the central steel wire.
Dependencies are inferred from the claim text.