Elevator, suspension body for the elevator, and manufacturing method for the suspension body

Patent metadata

Field	Value
Publication number	US-11370640-B2
Application number	US-201816604584-A
Country	US
Kind code	B2
Filing date	Apr 26, 2018
Priority date	Apr 26, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A suspension body for an elevator includes a core having a belt-like shape, and a covering layer covering at least a part of an outer periphery of the core. The core includes a load bearing layer. The load bearing layer is formed of an impregnation resin and a plurality of high-strength fibers. Further, the load bearing layer is divided into a plurality of segment layers arranged apart from each other in a thickness direction of the core. An intermediate layer made of a material different from that for the load bearing layer is interposed between the segment layers adjacent to each other in the thickness direction of the core.

First claim

The invention claimed is:

1. A suspension body for an elevator, comprising:
a core having a belt-like shape and including a load bearing layer formed of an impregnation resin and a plurality of high-strength fibers; and
a covering layer covering at least a part of an outer periphery of the core,
wherein a density of the high-strength fibers in a first center portion of the load bearing layer in a thickness direction of the load bearing layer is higher than a density of the high-strength fibers in both end portions of the load bearing layer in the thickness direction, or a density of the high-strength fibers in a second center portion of the load bearing layer in a width direction of the load bearing layer is higher than a density of the high-strength fibers in both end portions of the load bearing layer in the width direction.

2. The suspension body for an elevator according to claim 1 , wherein tensile rigidity of the first center portion of the load bearing layer is higher than that of the both end portions of the load bearing layer in the thickness direction.

3. The suspension body for an elevator according to claim 1 ,
wherein in the first center portion of the load bearing layer a volume content of the high-strength fibers is equal to or larger than 60%, and
wherein in the both end portions of the load bearing layer in the thickness direction, a volume content of the high-strength fibers is equal to or smaller than 50%.

4. The suspension body for an elevator according to claim 1 , wherein the Young's modulus of the impregnation resin is set equal to or lower than 1.5 GPa and equal to or higher than 0.1 GPa.

5. The suspension body for an elevator according to claim 1 , wherein the first center portion of the load bearing layer in the thickness direction is located on a side closer to a contact surface with a driving sheave around which the suspension body is wound than to a neutral axis of the suspension body in the thickness direction.

6. The suspension body for an elevator according to claim 1 ,
wherein the plurality of high-strength fibers include a plurality of kinds of high-strength fibers having different diameters, and
wherein a number of the high-strength fibers having smaller diameters in the both end portions of the load bearing layer in the thickness direction is reduced as compared with that in the first center portion of the load bearing layer.

7. The suspension body for an elevator according to claim 1 , wherein the density of the high-strength fibers decreases continuously from the first center portion toward the both end portions of the load bearing layer in the thickness direction.

8. An elevator, comprising:
a car; and
the suspension body of claim 1 , which is configured to suspend the car.

9. A suspension body for an elevator, comprising:
a core including a load bearing layer formed of an impregnation resin and a plurality of high-strength fibers; and
a covering layer covering at least a part of an outer periphery of the core,
wherein the core is divided into a plurality of core segments arranged apart from each other, each of the core segments being made of the load bearing layer,
wherein the covering layer enters a region between the core segments adjacent to each other, and
wherein a density of the high-strength fibers in a center portion of each of the core segments in a thickness direction of each of the core segments is higher than a density of the high-strength fibers in both end portions of each of the core segments in the thickness direction.

10. The suspension body for an elevator according to claim 9 , wherein the core segments are arranged apart from each other in a width direction of the core.

11. The suspension body for an elevator according to claim 9 , wherein the core segments are arranged apart from each other in a width direction and the thickness direction.

12. The suspension body for an elevator according to claim 9 , wherein tensile rigidity of the center portion of each of the core segments in the thickness direction is higher than that of the both end portions of each of the core segments in the thickness direction.

13. The suspension body for an elevator according to claim 9 ,
wherein in the center portion of each of the core segments in the thickness direction, a volume content of the high-strength fibers is equal to or larger than 60%, and
wherein in the both end portions of each of the core segments in the thickness direction, a volume content of the high-strength fibers is equal to or smaller than 50%.

14. The suspension body for an elevator according to claim 9 , wherein the Young's modulus of the impregnation resin is set equal to or lower than 1.5 GPa and equal to or higher than 0.1 GPa.

15. The suspension body for an elevator according to claim 9 , wherein the density of the high-strength fibers decreases continuously from the center portion toward the both end portions.

16. An elevator, comprising:
a car; and
the suspension body of claim 9 , which is configured to suspend the car.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hida Masahiko
• Matsumoto Michihito
• Kakutani Haruhiko
• Kondo Rikio
• Naito Shinya
• Tanaka Naoya
• Sera Masaya

Classifications

• D07B1/16

  Ropes or cables with an enveloping sheathing or inlays of rubber or plastics (D07B1/04, D07B1/10 take precedence) · CPC title

• D07B2205/3003

  Glass · CPC title

• D07B1/22

  Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes · CPC title

• D07B2205/3007

  Carbon · CPC title

• B66B7/062 Primary

  Belts · CPC title