Elevator car door interlock

Patent metadata

Field	Value
Publication number	US-11124389-B2
Application number	US-202016850196-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Aug 4, 2015
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A method of unlocking an elevator car door or an elevator car is provided including operating a door operator. A link arm of a car door interlock operably coupled to the door operator is rotated. If the elevator car is positioned within a landing door zone, an engagement link coupled to the link arm is configured to pivot relative to the link arm to disengage from an electrical contact. If the elevator car is not positioned within a landing door zone, the engagement link does not pivot relative to the link arm and remains engaged with the electrical contact.

First claim

What is claimed is:

1. A method of unlocking an elevator car door of an elevator car, comprising:
operating a door operator;
rotating a link arm of a car door interlock operably coupled to the door operator about a first axis to detect a position of the elevator car door via engagement of a sensing mechanism with an adjacent door vane; and
wherein if the elevator car is positioned within a landing door zone during the rotating the link arm, pivoting an engagement link coupled to the link arm about a second axis out of engagement with an electrical contact;
wherein if the elevator car is not positioned within a landing door zone during the rotating the link arm, the engagement link remains engaged with the electrical contact.

2. The method according to claim 1 , wherein the engagement link is only configured to rotate out of engagement with the electrical contact when further rotation of the link arm is restricted.

3. The method according to claim 1 , wherein further rotation of the link arm is restricted when a movable vane operably coupled to the link arm contacts an interlock roller.

4. The method according to claim 3 , wherein movement of the movable vane is driven by contact with a portion of the link arm.

5. The method of claim 1 , wherein rotation of the engagement link relative to the link arm is limited by a bumper.

6. The method of claim 1 , further comprising contacting an interlock roller with a movable vane when the elevator car is in the landing door zone, wherein the contact between the movable vane and the interlock roller is configured to restrict further rotation of the link arm.

7. The method of claim 6 , wherein the movable vane is operably coupled to the link arm and is mounted to the elevator car.

Assignees

• Otis Elevator Co

Inventors

• Kulak Richard E
• Tracey Michael J

Classifications

• B66B13/18 Primary

  without manually-operable devices for completing locking or unlocking of doors · CPC title

• B66B13/20 Primary

  Lock mechanisms actuated mechanically by abutments or projections on the cages · CPC title

• B66B13/12

  Arrangements for effecting simultaneous opening or closing of cage and landing doors · CPC title