# US 8,464,839 B2 · Car door apparatus for an elevator

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- Number: US 8,464,839 B2
- Document ID: US8464839B2
- Status: Granted
- Kind: B2
- Application number: 13/054,848
- Filed: 2008-09-25
- Published: 2011-06-30
- Granted: 2013-06-18
- Earliest claimed: 2008-09-25
- Assignees: Mitsubishi Electric Corporation
- Applicants: Tatsuhisa Ueno
- Inventors: Tatsuhisa Ueno
- Web page: https://patentgrep.com/patent/US8464839B2

## CPC

- B66B 13/30: Constructional features of doors or gates (of interest apart from this application E06B)
- B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00)

## Abstract

In a car door apparatus for an elevator, a closing-plate supporting portion is provided at a car-door front surface, the closing-plate supporting portion supporting the closing plate so that the closing plate is slidable along a direction in which the car door is opened and closed. A door-pocket cover is provided with a closing-plate engagement portion brought into engagement with the closing plate at the time of a door-closing operation to restrict displacement of the closing plate in a door-closing direction relative to the cover front-surface portion.

## Claims

### Claim 1

A car door apparatus for an elevator, comprising:
a car door for opening and closing a car doorway, having a car-door front surface opposed to a landing door;
a door clutch portion provided on the car-door front surface so as to project toward a landing to be brought into engagement with landing equipment;
a door-pocket cover including a cover front-surface portion opposed to the car-door front surface when the car door is fully opened, and a cover side-surface portion extending from the cover front-surface portion to a side opposite to the landing, the cover front-surface portion including a notch portion for allowing the door clutch portion to escape at a time of a door-opening operation; and
a closing plate for closing the notch portion when the car door is fully closed, wherein the car-door front surface is provided with a closing-plate supporting portion for supporting the closing plate so that the closing plate is slidable along a direction in which the car door is opened and closed,
the door-pocket cover is provided with a closing-plate engagement portion brought into engagement with the closing plate at a time of a door-closing operation to restrict displacement of the closing plate in a door-closing direction relative to the cover front-surface portion, and
the closing plate is displaced along with the car door in a door-opening direction to abut against an inner surface of the cover side-surface portion so as to slide in the door-closing direction relative to the car door at the time of the door-opening operation and is displaced along with the car door in the door-closing direction to be brought into engagement with the closing-plate engagement portion so as to slide in the door-opening direction relative to the car door at the time of the door-closing operation.

### Claim 2

A car door apparatus for an elevator, comprising:
a car door for opening and closing a car doorway, having a car-door front surface opposed to a landing door;
a door clutch portion provided on the car-door front surface so as to project toward a landing to be brought into engagement with landing equipment;
a door-pocket cover including a cover front-surface portion opposed to the car-door front surface when the car door is fully opened, and a cover side-surface portion extending from the cover front-surface portion to a side opposite to the landing, the cover front-surface portion including a notch portion for allowing the door clutch portion to escape at the time of a door-opening operation; and
a closing plate for closing the notch portion when the car door is fully closed, wherein
a closing-plate supporting portion for supporting the closing plate so that the closing plate is slidable along a direction in which the car door is opened and closed is provided on a surface of the cover front-surface portion, the surface being opposed to the car-door front surface,
a closing-plate engagement portion to be brought into engagement with the closing plate at the time of a door-closing operation is provided to an end of the car-door front surface, the end being on a door-pocket side, and
the closing plate is pressed by the door clutch portion to slide in a door-opening direction at the time of the door-opening operation and is brought into engagement with the closing-plate engagement portion to slide along with the car door in the door-closing direction at the time of the door-opening operation.

### Claim 3 (depends on 1)

The car door apparatus for an elevator, according to claim 1, further comprising biasing means for biasing the closing plate in a direction in which the closing plate is brought into engagement with the closing-plate engagement portion.

### Claim 4 (depends on 1)

The car door apparatus for an elevator, according to claim 1, wherein the closing plate is attracted to the closing-plate engagement portion by a magnetic force.

### Claim 5 (depends on 2)

The car door apparatus for an elevator, according to claim 2, further comprising biasing means for biasing the closing plate in a direction in which the closing plate is brought into engagement with the closing-plate engagement portion.

### Claim 6 (depends on 2)

The car door apparatus for an elevator, according to claim 2, wherein the closing plate is attracted to the closing-plate engagement portion by a magnetic force.