Elevator

Patent metadata

Field	Value
Publication number	US-2016340150-A1
Application number	US-201615139060-A
Country	US
Kind code	A1
Filing date	Apr 26, 2016
Priority date	May 20, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

An elevator includes a first elevator unit vertically movable in a hoistway, and a second elevator unit vertically movable in a hoistway. At least one of said elevator units is an elevator car. One or more belt-shaped hoisting ropes interconnects the first elevator unit and the second elevator unit. A drive wheel is provided for moving said one or more belt-shaped hoisting ropes. Each of the belt-shaped hoisting ropes passes around the drive wheel and includes consecutively a first rope section extending between the drive wheel and the first elevator unit, and a second rope section extending between the drive wheel and the second elevator unit. The elevator further includes non-driven cambered diverting wheels, each said first rope section being arranged to pass around a first cambered diverting wheel, in particular resting against a cambered circumferential surface area thereof, and each the second rope section being arranged to pass around a second cambered diverting wheel, in particular resting against a cambered circumferential surface area thereof. A rope monitoring arrangement is configured to monitor displacement of each of the first rope sections in the axial direction of the wheels away from a predefined zone, and displacement of each of the second rope sections in the axial direction of the wheels away from a predefined zone. The elevator is configured to stop the rotation of the drive wheel when one or more of the first and second rope sections is displaced in the axial direction of the wheels away from a predefined zone.

First claim

1 . An elevator, comprising:
a first elevator unit vertically movable in a hoistway, and a second elevator unit vertically movable in a hoistway, at least one of said elevator units being an elevator car; one or more belt-shaped hoisting ropes interconnecting the first elevator unit and the second elevator unit; and rope wheels including a drive wheel for moving said one or more belt-shaped hoisting ropes wherein each of said one or more belt-shaped hoisting ropes passes around the drive wheel and comprises consecutively a first rope section extending between the drive wheel and the first elevator unit, and a second rope section extending between the drive wheel and the second elevator unit, wherein the rope wheels further include one or more non-driven cambered diverting wheels, each said first rope section being arranged to pass around a first non-driven cambered diverting wheel, and wherein the elevator further comprises: a rope monitoring arrangement configured to monitor displacement of each of said first rope sections in the axial direction of the rope wheels away from a predefined zone, and displacement of each of the second rope sections in the axial direction of the rope wheels away from a predefined zone, and wherein the elevator is configured to stop rotation of the drive wheel when one or more of the first and second rope sections is displaced in the axial direction of the rope wheels away from a predefined zone.

2 . The elevator according to claim 1 , wherein each said second rope section is arranged to pass around a second non-driven cambered diverting wheel.

3 . The elevator according to claim 1 , wherein after rotation of the drive wheel in a first of its two rotation directions such that each said first rope section runs from the drive wheel towards the first non-driven cambered diverting wheel has been stopped triggered by displacement of one or more of the first and second rope sections away from a predefined zone, the elevator is configured to rotate the drive wheel slowly backwards without further rotation of the drive wheel in said first rotation direction.

4 . The elevator according to claim 1 , wherein the elevator is configured to continue said rotating the drive wheel slowly backwards until the car is level with the landing closest in direction where the car is moved by said backwards rotation, and to open door(s) leading from car to said landing when the car is level with said landing.

5 . The elevator according to claim 1 , wherein the elevator is configured:
to rotate the drive wheel in a first of its two rotation directions such that each said first rope section runs from the drive wheel towards the first non-driven cambered diverting wheel and each said second rope section runs from the second non-driven cambered diverting wheel towards the drive wheel; to monitor displacement of each of the first rope sections in the axial direction of the rope wheels away from a predefined zone, and displacement of each of the second rope sections in the axial direction of the rope wheels away from a predefined zone, while the drive wheel is rotated in first of its two rotation directions; and to stop the rotation of the drive wheel in said first of its two rotation directions when one or more of the first and second rope sections is displaced in the axial direction of the rope wheels away from a predefined zone; and thereafter to rotate the drive wheel slowly backwards without further rotation of the drive wheel in said first of its two rotation directions.

6 . The elevator according to claim 1 , wherein the elevator is configured to rotate the drive wheel slowly backwards only if one or more criteria are met.

7 . The elevator according to claim 6 , wherein said one or more criteria include at least one or both of the following:
none of the first rope sections are displaced in the axial direction of the rope wheels away from a predefined zone; and stopping the rotation of the drive wheel in said first of its rotation directions if triggered by displacement of one or more of the second rope sections away from a predefined zone.

8 . The elevator according to claim 1 , wherein the rope monitoring arrangement is configured to monitor displacement of each of said first rope sections as defined with a first detector, and displacement of each of said second rope sections as defined with a second detector.

9 . The elevator according to claim 1 , wherein said rope monitoring arrangement comprises:
at least one first detector configured to detect displacement of each of said first rope sections in the axial direction of the rope wheels away from a predefined zone; and at least one second detector configured to detect displacement of each of said second rope sections in the axial direction of the rope wheels away from a predefined zone.

10 . The elevator according to claim 1 , wherein each said first detector is configured to detect displacement of each of said first rope sections in an axial direction of the wheels over a first limit position or over a second limit position between which first and second limit position the first rope section is disposed, and each said second detector is configured to detect displacement of each of said second rope sections in an axial direction of the rope wheels over a first limit position or over a second limit position, between which first and second limit position the second rope section is disposed.

11 . The elevator according to claim 1 , wherein each predefined zone is delimited by a first and second limit position.

12 . The elevator according to claim 1 , wherein displacement of one or more of said first rope sections in the axial direction of the rope wheels away from a predefined zone, or displacement of one or more of said second rope sections in the axial direction of the rope wheels away from a predefined zone, is arranged to trigger the elevator to stop the rotation of the drive wheel.

13 . A method for controlling an elevator which elevator comprises:
a first elevator unit vertically movable in a hoistway, and a second elevator unit vertically movable in a hoistway, at least one of said elevator units being an elevator car; one or more belt-shaped hoisting ropes interconnecting the first elevator unit and the second elevator unit; and rope wheels including a drive wheel for moving said one or more belt-shaped hoisting ropes, wherein each of said one or more belt-shaped hoisting ropes passes around the drive wheel and comprises consecutively a first rope section extending between the drive wheel and the first elevator unit, and a second rope section extending between the drive wheel and the second elevator unit, wherein the rope wheels further include one or more non-driven cambered diverting wheels, each said first rope section being arranged to pass around a first non-driven cambered diverting wheel, and wherein the elevator further comprises: a rope monitoring arrangement, the method comprising the steps of: rotating the drive wheel in a first of its two rotation directions such that each said first rope section runs from the drive wheel towards the first non-driven cambered diverting wheel; monitoring displacement of each said first rope section in the axial direction of the rope wheels away from a predefined zone, as well as displacement of each said second rope section in the axial direction of the rope wheels away from a predefined zone, while the drive wheel is rotated in said first of its two rotation directions; and stopping the rotation of the drive wheel in said first of its two rotation directions when one or more of the first and second rope sections is displac

Assignees

• Kone Corp

Inventors

• Helenius Juha

Classifications

• B66B7/1215

  specially adapted for ropes or cables · CPC title

• B66B5/0006

  Monitoring devices or performance analysers (B66B5/02 takes precedence) · CPC title

• B66B5/00

  Applications of checking, fault-correcting, or safety devices in elevators · CPC title

• B66B11/0035 Primary

  Arrangement of driving gear, e.g. location or support · CPC title

• B66B11/04

  Driving gear {; Details thereof, e.g. seals (braking devices acting on the driving gear B66B5/02; of mining-hoist winding devices B66B15/08)} · CPC title