Elevator

Patent metadata

Field	Value
Publication number	US-9873594-B2
Application number	US-201414531604-A
Country	US
Kind code	B2
Filing date	Nov 3, 2014
Priority date	Nov 5, 2013
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A counterweightless elevator includes a hoistway, a car vertically movable in the hoistway, one or more suspension ropes, a rotatable drive member engaging said suspension rope(s), each of the suspension rope(s) having a first rope section on the first side of the drive member and a second rope section on the second side of the drive member, and each rope section being connected to the car, said first rope section suspending the car, and a tightening device arranged to tighten the second rope section. Each of said rope(s) is belt-like and includes a load bearing member or a plurality of load bearing members, which load bearing member(s) is/are made of composite material including reinforcing fibers embedded in a polymer matrix, which reinforcing fibers are carbon fibers.

First claim

The invention claimed is:

1. A counterweightless elevator comprising:
a hoistway;
a car vertically movable in the hoistway;
one or more suspension ropes;
a rotatable drive member, provided on a first side of the car and engaging said suspension rope(s), each of the suspension rope(s) having a first rope section on a first side of the drive member and a second rope section on a second side of the drive member, each rope section being connected to the car, wherein said first rope section passes from the rotatable drive member down to a first rope wheel mounted on a bottom of the car, and is then guided upwards to pass over an upper rope wheel provided on a second side of the car, forming a first rope loop suspending the car, said second rope section passes from the rotatable drive member to a second rope wheel mounted at a lower end of the hoistway, forming a second rope loop which is suspended by the car via a third rope wheel mounted on the bottom of the car, and each of the first rope wheel and the second rope wheel has an axis of rotation which is orthogonal to an axis of rotation of the rotatable drive member; and
a tightening device arranged to tighten the second rope section, wherein the second rope section is guided from the second rope wheel to the tightening device, and from the tightening device to the upper rope wheel provided on the second side of the car;
wherein each of said rope(s) is belt-like and comprises a load bearing member or a plurality of load bearing members, which load bearing member(s) is/are made of composite material comprising reinforcing fibers embedded in a polymer matrix, which reinforcing fibers are carbon fibers.

2. The elevator according to claim 1 , wherein said load bearing member(s) is/are parallel with the longitudinal direction of the rope.

3. The elevator according to claim 2 , wherein said the reinforcing fibers are parallel with the longitudinal direction of the load bearing member.

4. The elevator according to claim 2 , wherein said the second rope section is connected to a movably mounted tightening member of the tightening device of the second rope section, which tightening member is movable to tighten the second rope section.

5. The elevator according to claim 1 , wherein said reinforcing fibers are parallel with the longitudinal direction of the load bearing member.

6. The elevator according to claim 5 , wherein said the second rope section is connected to a movably mounted tightening member of the tightening device of the second rope section, which tightening member is movable to tighten the second rope section.

7. The elevator according to claim 1 , wherein said second rope section is connected to a movably mounted tightening member of the tightening device of the second rope section, which tightening member is movable to tighten the second rope section.

8. The elevator according to claim 1 , wherein the tightening device is mounted on the car at the side thereof, or on the stationary hoistway structures beside the vertical projection of the car, beside the path of the elevator car.

9. The elevator according to claim 1 , wherein the tightening device is mounted on the car at the side thereof, or on the stationary hoistway structures beside the vertical projection of the car, and the tightening member is movable along a vertical plane, which is parallel with the side wall plane of the car and/or hoistway inner wall plane to tighten the second rope section.

10. The elevator according to claim 1 , wherein the tightening member is between the vertical side wall plane of the car and a vertical hoistway inner wall plane.

11. The elevator according to claim 1 , wherein said first rope section, suspending the car is tensioned by the weight of the car, and guided to pass further to said tightening device of the second rope section and connected in a force transmitting manner to said movably mounted tightening member to pull the tightening member by effect of the rope tension of the first rope section such that the tightening member moves to tighten the second rope section.

12. The elevator according to claim 1 , wherein the tightening member is in the form of a tightening pulley around which the second rope section passes, the tightening member being movable in radial direction of the tightening pulley and/or around its axis, to tighten the second rope section.

13. The elevator according to claim 12 , wherein the plane of rotation of the tightening pulley is parallel with the side wall plane of the car and/or hoistway inner wall plane.

14. The elevator according to claim 1 , wherein the tightening member is in the form of a tightening pulley around which the second rope section passes, the tightening member being movable in radial direction of the tightening pulley to tighten the second rope section, the end of the first rope section being connected in a force transmitting manner to the movably mounted tightening pulley to pull the tightening pulley by effect of the rope tension of the first rope section such that the tightening pulley moves radially to tighten the second rope section.

15. The elevator according to claim 1 , wherein the tightening member is in the form of a tightening pulley around which the second rope section passes and against the rim of which the second rope section is fixed, the tightening member being movable around its axis to tighten the second rope section, the end of the first rope section being connected in a force transmitting manner to the movably mounted tightening pulley to pull the tightening pulley by effect of the rope tension of the first rope section such that the tightening pulley turns to tighten the second rope section.

16. The elevator according to claim 1 , wherein each of said rope(s) has at least one contoured side provided with elongated guide rib(s) and elongated guide groove(s) oriented in the longitudinal direction of the rope, said contoured side being fitted to pass against a contoured circumference of one or more rope wheels of the elevator, said circumference being provided with elongated guide rib(s) and elongated guide groove(s) so that said contoured circumference forms a counterpart for said contoured side(s) of the rope(s).

17. The elevator according to claim 1 , wherein each of said rope(s) has at least one contoured side provided with elongated guide rib(s) and elongated guide groove(s) oriented in the longitudinal direction of the rope, the contoured side of at least the first or the second rope section being fitted to pass against a contoured circumference of a rope wheel of the elevator, which circumference is provided with elongated guide rib(s) and elongated guide groove(s) so that said contoured circumference forms a counterpart for said contoured side(s) of the rope(s), and from said rope wheel, the first or the second rope section passes downwards or upwards to the tightening device to a pulley thereof, turning around a longitudinal axis thereof.

18. The elevator according to claim 1 , wherein the first and/or second rope section passes to the tightening device turning around a longitudinal axis thereof in a space between a vertical projection of the car and a vertical hoistway inner wall plane.

19. The elevator according to claim 1 , wherein the tightening device is mounted on the car at the side thereof, or on the stationary hoistway structures beside the vertical projection of the car.

20. The elevator according to claim 1 , wherein each of said rope(s) has at least one contoured side provided with elongated guide rib(s)

Assignees

• Kone Corp

Inventors

• Valjus Petteri

Classifications

• B66B7/10

  for equalising rope or cable tension · CPC title

• B66B11/007

  for counterweightless elevators · CPC title

• B66B7/062 Primary

  Belts · CPC title

• B66B9/00 Primary

  Kinds or types of lifts in, or associated with, buildings or other structures (characterised by control systems B66B1/00; apparatus for raising or lowering persons on stages of theatres A63J5/12) · CPC title

• B66B11/08 Primary

  with hoisting rope or cable operated by frictional engagement with a winding drum or sheave {(B66B11/008 takes precedence)} · CPC title