Method for releasing safety gears, and a stalling detector

Patent metadata

Field	Value
Publication number	US-2021284499-A1
Application number	US-202117184727-A
Country	US
Kind code	A1
Filing date	Feb 25, 2021
Priority date	Mar 10, 2020
Publication date	Sep 16, 2021
Grant date	—

Abstract

A method for releasing safety gears of an elevator car or a counterweight of an elevator system, the elevator system including a stalling detector coupled to compensation roping associated with the elevator car or the counterweight and configured to detect an increased rope tension, includes preventing a stalling indication from the stalling detector during a rescue operation; and moving the elevator car in order to release the safety gears.

First claim

1 . A method for releasing safety gears of an elevator car or a counterweight of an elevator system, the elevator system comprising a stalling detector coupled to compensation roping associated with the elevator car and the counterweight and configured to detect an increased rope tension, the method comprising:
preventing a stalling indication from the stalling detector during a rescue operation; and moving the elevator car in order to release the safety gears.

2 . The method of claim 1 , wherein preventing a stalling indication from the stalling detector during a rescue operation comprises setting the stalling detector in a rescue mode that prevents the stalling indication from the stalling detector during the rescue operation.

3 . The method of claim 1 , wherein setting the stalling detector in a rescue mode that prevents a stalling indication from the stalling detector during the rescue operation comprises locking the stalling detector in place with at least one of electromechanical and electrical means.

4 . The method of claim 2 , further comprising:
monitoring the stalling detector so that the elevator car cannot be taken into normal use when the stalling detector is locked or set to the rescue mode.

3 . The method of claim 1 wherein moving the elevator car in order to release the safety gears comprises moving the elevator car manually b pulling the elevator car downwards from the compensation roping.

6 . The method of claim 1 , wherein moving the elevator car in order to release the safety gears comprises moving the elevator car with elevator machinery.

7 . The method of claim 1 , wherein the stalling detector is configured in one of a diverting pulley, a car pulley and a rope termination point.

8 . The method of claim 1 , wherein preventing a stalling indication from the stalling detector during a rescue operation comprises:
obtaining, by an elevator safety controller, the stalling indication from the stalling detector; and overriding, by the elevator safety controller, the stalling indication during the rescue operation.

9 . A stalling detector coupled to compensation roping associated with an elevator car and a counterweight of an elevator system, the stalling detector being configured to:
detect an increased rope tension of the compensation roping; and enable prevention of sending a stalling indication in response to the detection during a rescue operation, the prevention enabling movement of the elevator car in order to release safety gears of the elevator car or the counter-weight.

10 . The stalling detector of claim 9 , wherein the stalling detector is configured to be set in a rescue mode that prevents sending of the stalling indication during the rescue operation.

11 . The stalling detector of claim 9 , wherein the stalling detector is configured to be lockable in place during the rescue operation with at least one of electrical or electromechanical means.

12 . The stalling detector of claim 9 , wherein the stalling detector is configured in one of a diverting pulley, a car pulley and a rope termination point.

13 . The stalling detector of claim 9 , wherein the stalling detector is coupled to a swing arm.

14 . An elevator system comprising:
an elevator; a counter-weight; compensation roping associated with the elevator car and counter-weight; safety gears associated with the elevator car or its associated counterweight; and the stalling detector of claim 9 , wherein the elevator car is configured to be moved in order to release the safety gears.

15 . An apparatus for releasing safety gears of an elevator car or a counterweight of an elevator system, the elevator system comprising a stalling detector coupled to compensation roping associated with the elevator car and the counterweight and configured to detect an increased rope tension, the apparatus being configured to:
prevent a stalling indication from the stalling detector during a rescue operation; and enable movement of the elevator car in order to release the safety gears.

16 . The method of claim 3 , further comprising:
monitoring the stalling detector so that the elevator car cannot be taken into normal use when the stalling detector is locked or set to the rescue mode.

17 . The method of claim 2 , wherein moving the elevator car in order to release the safety gears comprises moving the elevator car manually by pulling the elevator car downwards from the compensation roping.

18 . The method of claim 3 , wherein moving the elevator car in order to release the safety gears comprises moving the elevator car manually by pulling the elevator car downwards from the compensation roping.

19 . The method of claim 4 , wherein moving the elevator car in order to release the safety gears comprises moving the elevator car manually by pulling the elevator car downwards from the compensation roping.

20 . The method of claim 2 , wherein moving the elevator car in order to release the safety gears comprises moving the elevator car with elevator machinery.

Assignees

• Kone Corp

Inventors

• Siironen Tapio
• Talonen Tapani
• Viita-Aho Tarvo

Classifications

• B66B5/0043

  Devices enhancing safety during maintenance · CPC title

• B66B5/04 Primary

  for detecting excessive speed · CPC title

• B66B7/1215

  specially adapted for ropes or cables · CPC title

• B66B5/027 Primary

  to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door · CPC title

• B66B3/002

  Indicators · CPC title