US 5,690,188 AGranted

Elevator door system

AssigneeKabushiki Kaisha Toshiba

InventorsYasufumi Takakusaki, Yuichiro Kimura

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Abstract

An elevator door system including a landing door, a car door provided on a car, a latch device for locking the landing door when the landing door is closed. The elevator door system also includes a door locking device provided on the landing door composed of a coupling plate for coupling with the car door, an unlocking plate provided in parallel with the coupling plate, and a link for moving the unlocking plate toward the coupling plate. The elevator door system further includes a first linking mechanism for linking the door locking device with the latch device, and a coupling device provided on the car door composed of a pair of coupling rollers for coupling the car door with the landing door. One of the coupling rollers pushes the unlocking plate toward the coupling plate when the car lands the landing floor. A displacement of the unlocking plate caused by being pushed toward the coupling plate by the link is applied to the latch device. The latch device unlocks the landing door when the displacement of the unlocking plate is applied. The coupling device couples the car door with the landing door by pushing the door locking device when the car lands the landing floor and after the landing door is unlocked, and then the car door and the landing door are moved in one unit.

Claims5

Dependent claims

An elevator door system, comprising:

a landing door;
a car door provided on a car;
latch means for locking said landing door when said landing door is closed;
door locking means provided on said landing door composed of a coupling plate for coupling with said car door, an unlocking plate provided in parallel with said coupling plate, and a link connected between said coupling plate and said unlocking plate for moving said unlocking plate toward said coupling plate;
first linking mechanism for linking said door locking means with said latch means;
and
coupling means provided on said car door composed of a pair of coupling rollers for coupling said car door with said landing door, when said car lands a landing floor and said door locking means is positioned between said coupling rollers;
one of said coupling rollers of said coupling means pushing said unlocking plate toward said coupling plate when said car lands said landing floor;
a displacement of said unlocking plate caused by being pushed toward said coupling plate by said link being applied to said latch means through said first linking mechanism;
said latch means unlocking said landing door when said displacement of said unlocking plate is applied;
said coupling means coupling said car door with said landing door by pushing said door locking means between said coupling rollers of said coupling means when said car lands said landing floor and after said landing door is unlocked;
and
said car door and said landing door being moved in one unit after said coupling means couples said car door with said landing door.

10 more elements

Dependencies are inferred from the claim text.