Elevator rope and a manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-10676320-B2
Application number	US-201515750553-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Oct 16, 2015
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

In an elevator rope, an inner layer rope includes a fiber core that includes a. bundle of fibers; a plurality of inner layer rope strands that each include a plurality of steel wires are disposed around an outer circumference of the fiber core; and a resin inner layer rope coating body that is coated around an outer circumference of the fiber core and a layer of the inner layer rope strands. A plurality of outer layer strands each including a plurality of steel wires are disposed around an outer circumference of the inner layer rope coating body.

First claim

The invention claimed is:

1. An elevator rope comprising:
an inner layer rope comprising:
a fiber core that includes a bundle of fibers;
a resin fiber core coating body on an outer circumference of the fiber core;
a plurality of inner layer rope strands that each include a plurality of steel wires, and that are disposed around an outer circumference of the resin fiber core coating body;
a resin inner layer rope coating body that is coated around an outer circumference of the resin fiber core coating body and a layer of the inner layer rope strands; and
a plurality of outer layer strands that each include a plurality of steel wires, and that are disposed around an outer circumference of the inner layer rope coating body,
wherein the inner layer rope strands are greater in number than the outer layer strands.

2. An elevator rope comprising:
an inner layer rope comprising:
a fiber core that includes a bundle of fibers;
a resin fiber core coating body on an outer circumference of the fiber core;
a plurality of inner layer rope strands that each include a plurality of steel wires, and that are disposed around an outer circumference of the resin fiber core coating body;
a resin inner layer rope coating body that is coated around an outer circumference of the resin fiber core coating body and a layer of the inner layer rope strands; and
a plurality of outer layer strands that each include a plurality of steel wires, and that are disposed around an outer circumference of the inner layer rope coating body,
wherein a diameter of each of the inner layer rope strands is smaller than a diameter of each of the outer layer strands.

3. The elevator rope according to claim 1 , wherein a diameter of the inner layer rope strands is smaller than a diameter of any individual wire among the plurality of steel wires of the outer layer strands.

4. The elevator rope according to claim 1 , wherein a tensile strength of the inner layer rope strands is greater than or equal to a tensile strength of a wire that has greatest tensile strength among the plurality of individual steel wires of the outer layer strands.

5. The elevator rope according to claim 1 , wherein a disposable cross-sectional area of the fiber core is greater than or equal to forty percent relative to a cross-sectional area of a steel wire portion which includes the plurality of steel wires of the inner layer rope strands and the plurality of steel wires of the outer layer strands.

6. The elevator rope according to claim 1 , wherein a strength contribution ratio of the fiber core compared to the rope as a whole is greater than or equal to twenty percent.

7. An elevator rope manufacturing method comprising:
coating a resin fiber core coating body on an outer circumference of a fiber core that includes a bundle of fibers:
twisting together a plurality of inner layer rope strands that each include a plurality of steel wires around an outer circumference of the resin fiber core coating body;
coating a resin inner layer rope coating body around an outer circumference of the resin fiber core coating body and a layer of the inner layer rope strands; and
twisting together a plurality of outer layer strands that each include a plurality of steel wires around an outer circumference of the inner layer rope coating body,
wherein the inner layer rope strands are greater in number than the outer layer strands.

8. The elevator rope according to claim 1 , wherein a diameter of each of the inner layer rope strands is smaller than a diameter of each of the outer layer strands.

9. The elevator rope according to claim 2 , wherein a diameter of the inner layer rope strands is smaller than a diameter of any individual wire among the plurality of steel wires of the outer layer strands.

10. The elevator rope according to claim 8 . wherein a diameter of the inner layer rope strands is smaller than a diameter of any individual wire among the plurality of steel wires of the outer layer strands.

11. The elevator rope according to claim 2 , wherein a tensile strength of the inner layer rope strands is greater than or equal to a tensile strength of a wire that has greatest tensile strength among the plurality of individual steel wires of the outer layer strands.

12. The elevator rope according to claim 3 , wherein a tensile strength of the inner layer rope strands is greater than or equal to a tensile strength of a. wire that has greatest tensile strength among the plurality of individual steel wires of the outer layer strands.

13. The elevator rope according to claim 9 , wherein a tensile strength of the of the inner layer rope strands is greater than or equal to a tensile strength of a wire that has greatest tensile strength among the plurality of individual steel wires of the outer layer strands.

14. The elevator rope according to claim 1 , wherein:
a strength of a material of the fiber core is greater than or equal to 3,000 MPa.

15. The method according to claim 7 , wherein:
a strength of a material of the fiber core is greater than or equal to 3,000 MPa.

16. The elevator rope according to claim 2 , wherein:
a strength of a material of the fiber core is greater than or equal to 3,000 MPa.

Assignees

• Mitsubishi Electric Corp

Inventors

• Mitsui Atsushi

Classifications

• D07B2201/102

  including a core · CPC title

• D07B1/005

  Composite ropes, i.e. ropes built-up from fibrous or filamentary material and metal wires · CPC title

• D07B2201/2066

  characterised by the materials used · CPC title

• D07B2205/205

  Aramides · CPC title

• D07B2201/1036

  nine or more strands respectively forming multiple layers · CPC title