Claims
- 1. An elevator car door opening and closing system comprising:a landing door slidingly attached to a landing site, said landing door including coupling means, positioned on the hoist side of said door, for opening and closing said door, an elevator car door slidingly attached to an elevator car, door opening and closing apparatus for simultaneously opening and closing said landing door and said car door said apparatus comprising: an electrically powered door operator attached to said elevator car for opening and closing said doors, clutch means affixed to the hoist side of said elevator car door and kinematicly attached to said door operator, said clutch means including a single mechanical expanding and collapsing parallelogram linkage whereby said collapsing parallelogram linkage engages said landing door coupling means such that said landing door opens and closes simultaneously with said elevator car door.
- 2. The system as claimed in claim 1 wherein said coupling means includes at least one roller having an axis of rotation normal to said landing door.
- 3. The system as claimed in claim 1 wherein said coupling means includes two rollers having their axis of rotation normal to said landing door.
- 4. The system as claimed in claim 1 wherein said clutch means comprises:a planer base plate affixed to the hoist side of said elevator car door, first and second laterally disposed links, vertically separated, and attached, to said base plate, said first and second laterally disposed links each having first and second opposite ends thereof, said first and second link each rotatable about a pivot selectively positioned between said first and second opposite ends whereby said first and second links freely rotate in a plane parallel to said base plate, a first vertically disposed link pivotally attached to the first lateral ends of each first and second laterally disposed link and a second vertically disposed link pivotally attached to the second lateral end of each first and second laterally disposed link whereby said first and second laterally disposed links, in combination with said first and second vertically disposed links, form said collapsing parallelogram whereby the lateral distance between said first and second vertically disposed links may be selectively varied by rotation of said first and second laterally disposed links about their respective pivots, a rotatable cam wheel pivotally attached to said base plate whereby said cam wheel lies within the plane of said first and second laterally disposed links, a cam follower affixed to said second vertically disposed link and projecting into the plane of said first and second laterally disposed links whereby said cam follower engages the cam surface of said rotatable cam wheel, thereby causing the lateral distance between said first and second vertically disposed links to vary, as said cam wheel rotates, said vertically disposed links engaging or disengaging said coupling means there between, depending upon the rotation of said cam wheel, mechanical link means connecting said cam wheel and said door operator whereby said door operator opens and closes said car door while simultaneously rotating said cam wheel.
- 5. The system as claimed in claim 4 wherein said elevator car includes mechanical lock means whereby said car doors may not be fully opened when said coupling means is not positioned between said vertically disposed links, said mechanical lock means comprising:mechanical linkage attached to at least one of said vertically disposed links and said mechanical lock means whereby movement of said vertically disposed link, beyond a selected position, acts upon said mechanical linkage to deploy said mechanical lock means thereby preventing the opening of said elevator door beyond a predetermined position.
- 6. The system as claimed in claim 5 wherein said elevator doors are supported upon a laterally extending rail by door supporting roller assemblies attached to said doors and said mechanical lock means comprises a laterally disposed latching arm pivotally attached to one of said door supporting roller assemblies for engaging hook means selectively positioned upon said rail or said other door.
- 7. The system as claimed in claim 4 wherein said the pivots about which said laterally disposed links rotate are eccentrically positioned between said first and second lateral ends.
- 8. A clutch mechanism for use in an elevator opening and closing system comprising:a planer base plate, first and second laterally disposed links, vertically separated, and pivotally attached, to said base plate, said first and second laterally disposed links each having first and second laterally opposed ends thereof, said first and second link each rotatable about a pivot selectively positioned between said first and second opposite ends whereby said first and second links freely rotate in a plane parallel to said base plate, a first vertically disposed link pivotally attached to the first lateral ends of each first and second laterally disposed link and a second vertically disposed link pivotally attached to the second lateral end of each first and second laterally disposed link whereby said first and second laterally disposed links, in combination with said first and second vertically disposed links, form a collapsing parallelogram whereby the lateral distance between said first and second vertically disposed links may be selectively varied by rotation of said first and second laterally disposed links about their respective pivots, a rotatable cam wheel pivotally attached to said base plate whereby said cam wheel generally lies within the plane of said first and second laterally disposed links, a cam follower affixed to one of said vertically disposed link and projecting into the plane of said first and second laterally disposed links whereby said cam follower engages the cam surface of said rotatable cam wheel, thereby causing the lateral distance between said first and second vertically disposed links to vary, as said cam wheel rotates.
- 9. The clutch mechanism as claimed in claim 8 wherein the pivots about which said laterally disposed links rotate are eccentrically positioned between said first and second lateral ends.
- 10. The system as claimed in claim 1 wherein said electrically powered door operator includes a speed reducing torque multiplier.
- 11. The system as claimed in claim 1 wherein said electrically powered door operator includes a cycloidal speed reducing torque multiplier.
RELATED APPLICATIONS
This is a non-provisional application based upon an earlier filed provisional application Ser. No. 60/248,918 filed Nov. 15, 2000.
US Referenced Citations (19)
Provisional Applications (1)
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Number |
Date |
Country |
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60/248918 |
Nov 2000 |
US |