Elevator

• US 20040016603A1
• Filed: 06/03/2003
• Published: 01/29/2004
• Est. Priority Date: 06/21/2001
• Status: Active Grant

• Current Assignee: Kone Corporation
• Original Assignee: Kone Corporation
• Inventors: Mustalahti, Jorma, Aulanko, Esko, Makimattila, Simo, Rantanen, Pekka
• Granted Patent: US 9,315,938 B2
• Time in Patent Office: Days
• US Class Current: 187/254
• CPC Class Codes: B66B 11/00 Main component parts of lifts in, or associated with, buildings or other structures
• CPC Class Codes: B66B 11/08 with hoisting rope or cable operated by frictional engagement with a winding drum or sheave B66B11/008 takes precedence
• CPC Class Codes: B66B 7/06 Arrangements of ropes or cables
• CPC Class Codes: D07B 1/0673 having a rope configuration
• CPC Class Codes: D07B 1/16 Ropes or cables with an enveloping sheathing or inlays of rubber or plastics D07B1/04, D07B1/10 take precedence
• CPC Class Codes: D07B 1/165 characterised by a plastic or rubber inlay
• CPC Class Codes: D07B 2201/1036 nine or more strands respectively forming multiple layers
• CPC Class Codes: D07B 2501/2007 Elevators
• CPC Class Codes: F16G 9/00 Ropes or cables specially adapted for driving, or for being driven by, pulleys or other gearing elements ropes or cables in general D07B

Abstract

In an elevator, preferably one without machine room, a hoisting machine engages a set of hoisting ropes via a traction sheave, said set of hoisting ropes having a load-bearing part twisted from steel wires of circular and/or non-circular cross-section, and in which elevator the hoisting ropes support a counterweight and an elevator car moving on their tracks. The weight of the hoisting machine of the elevator is at most about ⅕ of the weight of the nominal load of the elevator.

Claims

1. Elevator, preferably an elevator without machine room, in which elevator a hoisting machine engages a set of hoisting ropes via a traction sheave, said set of hoisting ropes having a load-bearing part twisted from steel wires of circular and/or non-circular cross-section, and in which elevator the hoisting ropes support a counterweight and an elevator car moving on their tracks, characterized in that the weight of the hoisting machine of the elevator is at most about ⅕

of the weight of the nominal load of the elevator.

2. Elevator as defined in claim 1, characterized in that the strength of the steel wires of the hoisting ropes is greater than about 2300 N/mm² and less than about 2700 N/mm².

3. Elevator as defined in claim 1 or 2, characterized in that the cross-sectional area of the steel wires of the hoisting ropes is larger than about 0.015 mm² and smaller than about 0.2 mm^2, and that the steel wires of the hoisting ropes have a strength exceeding about 2000 N/mm².

4. Elevator as defined in claim 1 or 2, characterized in that the outer diameter of the traction sheave driven by the hoisting machine of the elevator is at most about 250 mm.

5. Elevator as defined in claim 1 or 2, characterized in that the weight of the hoisting machine of the elevator is at most about 100 kg.

6. Elevator as defined in any one of the preceding claims, characterized in that the speed governor rope is thicker in diameter than the hoisting ropes.

7. Elevator as defined in any one of the preceding claims, characterized in that the speed governor rope is of the same thickness in diameter as the hoisting ropes.

8. Elevator as defined in any one of the preceding claims, characterized in that the weight of the hoisting machine of the elevator is at most about ⅙

of the nominal load, advantageously at most about ⅛

of the nominal load, most advantageously less than about {fraction (1/10)} of the nominal load.

9. Elevator as defined in any one of the preceding claims, characterized in that the total weight of the elevator machine and its supporting elements is at most ⅕

of the nominal load, preferably at most about ⅛

of the nominal load.

10. Elevator as defined in any one of the preceding claims, characterized in that the diameter of the pulleys (502) supporting the car is equal to or less than the height dimension of a horizontal beam (504) comprised in the structure supporting the car.

11. Elevator as defined in any one of the preceding claims, characterized in that the pulleys (502) are placed at least partially inside the beam (504).

12. Elevator as defined in any one of the preceding claims, characterized in that the track of the elevator car is in an elevator shaft.

13. Elevator as defined in any one of the preceding claims, characterized in that at least part of the spaces between strands and/or wires in the hoisting ropes is filled with rubber, urethane or some other medium of a substantially non-fluid nature.

14. Elevator as defined in any one of the preceding claims, characterized in that the hoisting ropes have a surface made of rubber, urethane or some other non-metallic material.

15. Elevator as defined in any one of the preceding claims, characterized in that the traction sheave is coated at least in its rope grooves with a non-metallic material.

16. Elevator as defined in any one of the preceding claims, characterized in that the traction sheave is made of a non-metallic material at least in the rim part comprising the rope grooves.

17. Elevator as defined in any one of the preceding claims, characterized in that the D/d ratio is lower than 40.