Elevator car door interlock

Patent metadata

Field	Value
Publication number	US-11247872-B2
Application number	US-201816163003-A
Country	US
Kind code	B2
Filing date	Oct 17, 2018
Priority date	Oct 17, 2018
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

An elevator car door interlock includes a first link assembly having a first intermediate link movably connected to a first vane, and a first link having a first link first end pivotally connected to the first intermediate link and a first link second end pivotally connected to the second vane. A latch assembly includes a door latch pivotally connected to the baseplate wherein responsive to operation of a drive mechanism that is drivably connected to the first link second end, while an interlock roller engages at least one of the first vane and the second vane, the first vane moves towards the second vane and the door latch pivots to unlock an elevator car door.

First claim

What is claimed is:

1. An elevator car door interlock, comprising:
a first vane;
a second vane;
a first link assembly, comprising:
a first intermediate link movably connected to the first vane, and
a first link pivotally connected to a baseplate, the first link having a first link first end pivotally connected to the first intermediate link and a first link second end pivotally connected to the second vane; and
a latch assembly, comprising:
a door latch pivotally connected to the baseplate, the door latch having a door latch first end and a door latch second end, and
a latch link having a latch link first end pivotally connected to the first intermediate link and a latch link second end pivotally connected to the door latch first end;
wherein the first vane defines a closed slot having a first slot first end and first slot second end;
wherein the first intermediate link includes a pivot pin that extends into the closed slot and a second pivot that extends into the first vane;
wherein responsive to operation of a drive mechanism that is drivably connected to the first link second end, while an interlock roller engages at least one of the first vane and the second vane, the first vane moves, relative to the baseplate, towards the second vane and the pivot pin moves from the first slot first end towards the first slot second end.

2. The elevator car door interlock of claim 1 , wherein responsive to operation of a drive mechanism that is drivably connected to the first link second end, while an interlock roller is spaced apart from at least one of the first vane and the second vane, the first vane moves, relative to the baseplate, towards the second vane and the pivot pin is disposed proximate the first slot first end.

3. The elevator car door interlock of claim 2 , wherein while the pivot pin is disposed proximate the first slot first end, the first intermediate link is inhibited from pivoting about the second pivot and the door latch is inhibited from being pivoted.

4. The elevator car door interlock of claim 1 , wherein responsive to the pivot pin moving from the first slot first end towards the first slot second end, the first intermediate link pivots about the second pivot such that the latch link pivots the door latch.

5. An elevator car door interlock, comprising:
a first link assembly, comprising:
a first intermediate link movably connected to a first vane, and
a first link pivotally connected to a baseplate, the first link having a first link first end pivotally connected to the first intermediate link and a first link second end pivotally connected to a second vane;
a latch assembly, comprising:
a door latch pivotally connected to the baseplate, the door latch having a door latch first end and a door latch second end that is arranged to selectively engage a lock member to selectively inhibit opening of an elevator car door, and
a latch link having a latch link first end pivotally connected to the first intermediate link and a latch link second end pivotally connected to the door latch first end; and
wherein the first vane defines a closed first slot having a first slot first end and first slot second end;
wherein the first intermediate link includes a pivot pin that extends into the first slot having a first slot first end and first slot second end, a second pivot that extends into the first vane, and a third pivot that extends into the latch link first end;
wherein responsive to operation of a drive mechanism that is drivably connected to the first link second end, the first vane moves, relative to the baseplate, towards the second vane and the pivot pin moves from the first slot first end towards the first slot second end.

6. The elevator car door interlock of claim 5 , further comprising:
a second link assembly spaced apart from the first link assembly, the second link assembly, comprising:
a second intermediate link movably connected to the first vane, and
a second link pivotally connected to the baseplate, the second link having a second link first end pivotally connected to the second intermediate link and a second link second end pivotally connected to the second vane.

7. The elevator car door interlock of claim 6 , wherein the first vane defines a second slot having a second slot first end and second slot second end.

8. The elevator car door interlock of claim 7 , wherein the second intermediate link includes a second pivot pin that extends into the second slot and a fifth pivot that extends into the first vane.

9. The elevator car door interlock of claim 8 , wherein responsive to operation of the drive mechanism that is drivably connected to the first link second end and the pawl in a first direction, while an interlock roller engages at least one of the first vane and the second vane, the first vane moves, relative to the baseplate, towards the second vane, at least one of the pivot pin moves from the first slot first end towards the first slot second end and the second pivot pin moves from the second slot first end towards the second slot second end, such that the first intermediate link pivots about the second pivot such that the latch link pivots the door latch to disengage the lock member.

10. The elevator car door interlock of claim 9 , further comprising:
a biasing member connected to the first vane and at least one of the second vane and a second link second end.

11. The elevator car door interlock of claim 10 , wherein the biasing member is arranged to move the second vane such that the second intermediate link pivots about the fifth pivot and the first intermediate link pivots about the second pivot such that the latch link pivots the door latch to disengage the lock member.

Assignees

• Otis Elevator Co

Inventors

• Tracey Michael J
• Kulak Richard E

Classifications

• B66B13/12 Primary

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

• B66B13/14 Primary

  Control systems or devices · CPC title

• B66B13/20 Primary

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