Elevator provided with a coated hoisting rope

Patent metadata

Field	Value
Publication number	US-9428364-B2
Application number	US-96909504-A
Country	US
Kind code	B2
Filing date	Oct 21, 2004
Priority date	Jun 7, 2002
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

An elevator may include: drive machine, hoisting ropes, traction sheave, elevator car, counterweight, and elevator car and counterweight guide rails. The drive machine may engage the hoisting ropes using the traction sheave. The hoisting ropes may support the elevator car on the elevator car guide rails and the counterweight on the counterweight guide rails. The hoisting ropes may include coated hoisting ropes of substantially circular cross-section. The hoisting ropes may have a load-bearing part twisted from steel wires of circular, non-circular, or circular and non-circular cross-section. A cross-sectional area of the steel wires may be less than about 0.2 mm 2 . A strength of the steel wires may be greater than about 2000 N/mm 2 . A core of each hoisting rope may include the load-bearing part. The core may be coated with a substantially thin sheath that forms a surface of the hoisting rope. The sheath may be softer than the core.

First claim

The invention claimed is:

1. An elevator without a machine room, the elevator comprising:
a drive machine;
a set of hoisting ropes;
a traction sheave having a plurality of rope grooves;
an elevator car;
a counterweight;
elevator car guide rails; and
counterweight guide rails;
wherein the drive machine engages the set of hoisting ropes using the traction sheave,
wherein the set of hoisting ropes supports the elevator car moving on the elevator car guide rails,
wherein the set of hoisting ropes supports the counterweight moving on the counterweight guide rails,
wherein the set of hoisting ropes includes coated hoisting ropes of substantially circular cross-section,
wherein the hoisting ropes have a load-bearing part twisted from steel wires of circular cross-section, non-circular cross-section, or circular and non-circular cross-section,
wherein a cross-sectional area of the steel wires of each hoisting rope is greater than 0.015 mm 2 and less than 0.2 mm 2 ,
wherein a strength of the steel wires is greater than 2300 N/mm 2 ,
wherein a core of each hoisting rope includes the load-bearing part,
wherein the core of each hoisting rope is coated with a substantially thin sheath that forms a surface of the hoisting rope,
wherein the sheath is softer than the core,
wherein a diameter of the core of each hoisting rope is a diameter of the hoisting rope excluding only the sheath,
wherein the diameter of the core is greater than or equal to 2.5 mm and less than or equal to 8 mm,
wherein each of the plurality of rope grooves is of a substantially semi-circular cross-sectional form, and
wherein each of the plurality of rope grooves is coated.

2. The elevator of claim 1 , wherein the sheath of the hoisting ropes is made from at least one of rubber, polyurethane, and other non-metallic material, and
wherein the sheath has a hardness greater than 80 Shore A.

3. The elevator of claim 2 , wherein the hardness of the sheath is greater than or equal to 88 Shore A and less than or equal to 95 Shore A.

4. The elevator of claim 1 ,
wherein a ratio of the diameter of the core to a thickness of the sheath is substantially greater than 4:1.

5. The elevator of claim 4 , wherein the ratio of the diameter of the core to the thickness of the sheath is greater than or equal to about 6:1 and less than or equal to 12:1.

6. The elevator of claim 4 , wherein the ratio of the diameter of the core to the thickness of the sheath is 8:1.

7. The elevator of claim 1 , wherein the diameter of the core of each hoisting rope is greater than or equal to 4 mm and less than or equal to 6 mm, and
wherein the sheath has a thickness greater than or equal to 0.4 mm and less than or equal to 0.6 mm.

8. The elevator of claim 7 , wherein the thickness of the sheath is 0.5 mm.

9. The elevator of claim 1 , wherein an external diameter of the traction sheave is less than or equal to 250 mm.

10. The elevator of claim 1 , wherein at least part of spaces between the steel wires in the hoisting ropes is filled with at least one of rubber, urethane, and other medium of substantially non-fluid nature.

11. The elevator of claim 1 , wherein an external diameter of the traction sheave is less than 200 mm.

12. The elevator of claim 1 , wherein a ratio of an external diameter of the traction sheave to a thickness of each hoisting rope is less than 40:1.

13. The elevator of claim 1 , wherein a thickness of the sheath depends on the diameter of the core on which the sheath is formed, and wherein a ratio of the diameter of the core to the thickness of the sheath is substantially greater than 4:1.

14. The elevator of claim 1 , wherein the core of each hoisting rope is coated with a separate and substantially thin sheath that forms the surface of the hoisting rope, and the surface of each coated core has a substantially circular cross-section.

15. An elevator with a machine room, the elevator comprising:
a drive machine;
a set of hoisting ropes;
a traction sheave including a plurality of rope grooves;
an elevator car;
a counterweight;
elevator car guide rails; and
counterweight guide rails;
wherein the drive machine engages the set of hoisting ropes using the traction sheave,
wherein the set of hoisting ropes supports the elevator car moving on the elevator car guide rails,
wherein the set of hoisting ropes supports the counterweight moving on the counterweight guide rails,
wherein the set of hoisting ropes includes coated hoisting ropes of substantially circular cross-section,
wherein the hoisting ropes have a load-bearing part twisted from steel wires of circular cross-section, non-circular cross-section, or circular and non-circular cross-section,
wherein a cross-sectional area of the steel wires of each hoisting rope is greater than 0.015 mm 2 and less than 0.2 mm 2 ,
wherein a strength of the steel wires is greater than 2300 N/mm 2 ,
wherein a core of each hoisting rope includes the load-bearing part,
wherein the core of each hoisting rope is coated with a substantially thin sheath that forms a surface of the hoisting rope,
wherein the sheath is softer than the core,
wherein a diameter of the core of each hoisting rope is a diameter of the hoisting rope excluding only the sheath,
wherein the diameter of the core is greater than or equal to 2.5 mm and less than or equal to 8 mm,
wherein each of the plurality of rope grooves is of a substantially semi-circular cross-sectional form, and
wherein each of the plurality of rope grooves is coated.

16. The elevator of claim 15 , wherein an external diameter of the traction sheave is less than or equal to 250 mm.

17. The elevator of claim 15 , wherein an external diameter of the traction sheave is less than 200 mm.

18. The elevator of claim 15 , wherein a ratio of an external diameter of the traction sheave to a thickness of each hoisting rope is less than 40:1.

19. The elevator of claim 15 , wherein a thickness of the sheath depends on the diameter of the core on which the sheath is formed, and wherein a ratio of the diameter of the core to the thickness of the sheath is substantially greater than 4:1.

20. An elevator, comprising:
a drive machine;
a set of hoisting ropes;
a traction sheave including a plurality of rope grooves;
an elevator car;
a counterweight;
elevator car guide rails; and
counterweight guide rails;
wherein the drive machine engages the set of hoisting ropes using the traction sheave,
wherein the set of hoisting ropes supports the elevator car moving on the elevator car guide rails,
wherein the set of hoisting ropes supports the counterweight moving on the counterweight guide rails,
wherein the set of hoisting ropes includes coated hoisting ropes of substantially circular cross-section,
wherein the hoisting ropes have a load-bearing part twisted from steel wires of circular cross-section, non-circular cross-section, or circular and non-circular cross-section,
wherein a cross-sectional area of at least some of the steel wires of the hoisting ropes is 0.008 mm 2 ,
wherein a strength of the steel wires is greater than 2300 N/mm 2 ,
wherein a core of each hoisting rope includes the load-bearing part,
wherein the core of each hoisting rope is coated with a substantially thin sheath that forms a surface of the hoisting rope,
wherein the sheath is softer than the core,
wherein a diameter of the core of each hoisting rope is a diameter of the hoisting rope excluding only the sheath,
wherein the diameter of the core is greater tha

Assignees

• Aulanko Esko
• Mustalahti Jorma
• Rantanen Pekka
• Mäkimattila Simo
• Kone Corp

Inventors

• Aulanko Esko
• Mustalahti Jorma
• Rantanen Pekka
• Mäkimattila Simo

Classifications

• D07B2201/2001

  Wires or filaments · CPC title

• D07B2501/2007

  Elevators · CPC title

• B66B11/008

  with hoisting rope or cable operated by frictional engagement with a winding drum or sheave · CPC title

• D07B1/0673

  having a rope configuration · CPC title

• B66B7/06

  Arrangements of ropes or cables · CPC title