Compensation device and elevator

Patent metadata

Field	Value
Publication number	US-9409749-B2
Application number	US-201313734387-A
Country	US
Kind code	B2
Filing date	Jan 4, 2013
Priority date	Jul 5, 2010
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A compensation device of a traction sheave elevator is provided. The elevator includes a compensation rope running from an elevator car to a compensation sheave of the compensation device located in the lowermost part of the elevator shaft around which the compensation rope runs. The compensation sheave is vertically guided with respect to the shaft bottom via a guiding structure, which allows a vertical movement of the axis of the compensation sheave. The guiding structure includes at least one scissor joint arrangement having its lower end adapted to be connected with an elevator shaft bottom and its upper end being connected with the compensation sheave axis. An elevator includes such kind of compensation device. Vertical movement of the axis of a compensation sheave can be obtained with a very low shaft height requirement.

First claim

The invention claimed is:

1. A compensation device of a traction sheave elevator, which elevator comprises a compensation rope running from an elevator car to a compensation sheave of the compensation device located in an elevator shaft bottom around which the compensation rope runs, whereby the compensation sheave is vertically guided with respect to the elevator shaft bottom via a guiding structure which allows a vertical movement of an axis of the compensation sheave, wherein the guiding structure comprises at least one scissor joint arrangement having its lower end adapted to be connected with the elevator shaft bottom and its upper end being connected with the compensation sheave axis,
wherein the scissor joint arrangement comprises a pair of first arms, a pair of second arms, and at least one horizontal lockdown device, both one of the first arms and one of the second arms pivot at a first pivot, and both the other one of the first arms and the other one of the second arms pivot at a second pivot, the at least one horizontal lockdown device having a first end located at the first pivot, and a second end located at the second pivot, the at least one lockdown device limiting a maximal range of vertical movement of the upper end of the scissor joint arrangement, a total length of the at least one horizontal lockdown device between the first end and the second end changing during the vertical movement of the upper end of the scissor joint arrangement, the total length of the at least one horizontal lockdown device between the first end and the second end being a total length of an entirety of the at least one horizontal lockdown device in a direction from the first end to the second end and changing during the vertical movement of the upper end of the scissor joint arrangement.

2. The compensation device according to claim 1 , wherein the pair of first arms is articulated to a base part fixed with respect to the elevator shaft bottom.

3. The compensation device according to claim 2 , wherein the pair of second arms is articulated to the pair of first arms via the first pivot and the second pivot.

4. The compensation device according to claim 3 , wherein the pair of second arms comprises two spaced apart arm sections which are pivoted at their upper ends to a mounting support for the axis of the compensation sheave, whereby between arm sections a gap is provided which is larger than a thickness of the compensation sheave.

5. The compensation device according to claim 4 , wherein the pivot axes of the scissor joint arrangement are coaxial or perpendicular to the compensating sheave axis.

6. The compensation device according to claim 4 , wherein the pair of first arms has in an axial direction of the compensation sheave a larger width than a thickness of the compensation sheave.

7. The compensation device according to claim 3 , wherein the pivot axes of the scissor joint arrangement are coaxial or perpendicular to the compensating sheave axis.

8. The compensation device according to claim 3 , wherein the pair of first arms has in an axial direction of the compensation sheave a larger width than a thickness of the compensation sheave.

9. The compensation device according to claim 2 , wherein the pivot axes of the scissor joint arrangement are coaxial or perpendicular to the axis of the compensation sheave.

10. The compensation device according to claim 9 , wherein the pair of first arms has in an axial direction of the compensation sheave a larger width than a thickness of the compensation sheave.

11. The compensation device according to claim 2 , wherein the pair of first arms has in an axial direction of the compensation sheave a larger width than a thickness of the compensation sheave.

12. The compensating device according to claim 1 , wherein the lockdown device is a hydraulic or pneumatic cylinder having a first chamber and a second chamber between which a piston is movable.

13. The compensating device according to claim 12 , wherein at least the first chamber of the cylinder is connected via a pressure pump to a fluid storage.

14. An elevator comprising at least one elevator car, a suspension rope on which the elevator car is suspended, a drive machine comprising a traction sheave gripping the suspension rope to move the elevator car, and a compensation device according to claim 1 .

15. The elevator according to claim 14 , further comprises a counterweight which is suspended on the suspension rope, and that the compensation rope runs between the car and the counterweight to the lower part of the elevator shaft via the compensation sheave.

16. The compensation device according to claim 1 , wherein the lockdown device comprises a buffer.

17. The compensation device according to claim 1 , wherein a tension weight is fixed to the upper end of the scissor joint arrangement.

18. The compensation device according to claim 1 , wherein the scissor joint arrangement comprises two scissor joints, which are located on a mounting support for the compensation sheave.

19. The compensation device according to claim 1 , wherein the total length of the at least one horizontal lockdown device between the first end and the second end and the total length of an entirety of the at least one horizontal lockdown device in the direction from the first end to the second end decrease during the vertical movement of the upper end of the scissor joint arrangement in an upward direction, and increase during the vertical movement of the upper end of the scissor joint arrangement in a downward direction.

20. A compensation device of a traction sheave elevator, which elevator comprises a compensation rope running from an elevator car to a compensation sheave of the compensation device located in an elevator shaft bottom around which the compensation rope runs, whereby the compensation sheave is vertically guided with respect to the elevator shaft bottom via a guiding structure which allows a vertical movement of an axis of the compensation sheave, wherein the guiding structure comprises at least one scissor joint arrangement having its lower end adapted to be connected with the elevator shaft bottom and its upper end being connected with the compensation sheave axis,
wherein the scissor joint arrangement comprises a pair of first arms, a pair of second arms, and at least one horizontal lockdown device, both one of the first arms and one of the second arms pivot at a first pivot, and both the other one of the first arms and the other one of the second arms pivot at a second pivot, the at least one horizontal lockdown device having a first end located at the first pivot, and a second end located at the second pivot, the at least one lockdown device limiting a maximal range of vertical movement of an upper end of the scissor joint arrangement, a total length of the at least one horizontal lockdown device between the first end and the second end changing during the vertical movement of the upper end of the scissor joint arrangement, and
wherein the at least one horizontal lockdown device is a hydraulic or pneumatic damper element.

Assignees

• Kone Corp

Inventors

• Kalliomäki Jaakko

Classifications

• B66F7/0658

  Multiple scissor linkages horizontally arranged · CPC title

• B66B7/068 Primary

  Cable weight compensating devices · CPC title

• B66B7/10 Primary

  for equalising rope or cable tension · CPC title