Elevator car door locking apparatus

Patent metadata

Field	Value
Publication number	US-9656835-B2
Application number	US-201314894675-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Jul 19, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

In an elevator car door locking apparatus, a doorstop-side blade is disposed on a car door by a linking mechanism, and is displaceable horizontally between a locked position, and an unlocked position that is further away from a door pocket than the locked position. A balance weight is disposed on an opposite side of the pivoting shaft of the link from the doorstop-side blade. The doorstop-side blade comes into contact with a landing door engaging member and displaces, and the balance weight also displaces away from the doorstop-side blade, due to the car door moving toward the door pocket side when a car is in position at a floor.

First claim

The invention claimed is:

1. An elevator car door locking apparatus comprising:
a locking apparatus that locks a car door in a closed position;
a linking mechanism that includes links that are disposed on the car door so as to be pivotable around pivoting shafts;
a doorstop-side blade that is disposed on the car door by means of the linking mechanism, and that is displaceable horizontally between a locked position, and an unlocked position that is further away from a door pocket than the locked position;
a transmission mechanism that mechanically transmits displacement of the doorstop-side blade toward the unlocked position to the locking apparatus to place the locking apparatus in an unlocked state; and
a balance weight that is disposed on an opposite side of the pivoting shaft of the link from the doorstop-side blade,
wherein the elevator car door locking apparatus is configured such that the doorstop-side blade comes into contact with a landing door engaging member that is disposed on a landing door and displaces to the unlocked position, and the balance weight also displaces away from the doorstop-side blade, due to the car door moving toward the door pocket side when a car is in position at a floor.

2. The elevator car door locking apparatus according to claim 1 , wherein the pivoting shaft and the balance weight are disposed closer to a door pocket side than a contacting surface of the doorstop-side blade with the landing door engaging member when viewed from directly above.

3. The elevator car door locking apparatus according to claim 1 , wherein a moment around the pivoting shafts due to force of inertia of the linking mechanism and the balance weight when the car door performs opening and closing operations and a moment around the pivoting shafts due to force of inertia of the doorstop-side blade that is applied to a connecting position of the doorstop-side blade onto the linking mechanism when the car door performs the opening and closing operations balance with each other.

4. The elevator car door locking apparatus according to claim 1 , wherein:
the locking apparatus includes:
a car-side latch that is disposed pivotably on the car; and
a door-side latch that is disposed on the car door; and

the transmission mechanism includes an unlocking lever that places the car-side latch in the unlocked state when the doorstop-side blade is displaced to the unlocked position.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kitazawa Masaya

Classifications

• B66B13/12 Primary

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

• B66B13/18 Primary

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