Sealed elevator cab entrance assembly

• US 5,305,855 A
• Filed: 03/25/1993
• Issued: 04/26/1994
• Est. Priority Date: 03/25/1993
• Status: Expired due to Fees

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Tonna, Christian, Rivera, James A.
• Primary Examiner(s): Noland, Kenneth W.
• Application Number:
  US08/037,138
• Time in Patent Office: 397 Days
• Field of Search: 187/56, 187/51, 187/1 R, 49/120, 49/116, 49/475.1, 49/428, 49/483.1
• US Class Current: 187/334
• CPC Class Codes: B66B 13/301 Details of door sills

Abstract

The entrance to an elevator cab is provided with wedge gaskets both above and below the cab door opening. The upper gasket is mounted on the door opening header, and the lower gasket is mounted in the door sill. Gasket-engaging brackets are mounted on the top and bottom of each door to snugly engage the gaskets when the cab doors are closed. The closed cab is substantially sealed against penetration by hoistway air so as to provide a quieter smoother ride, especially at high operating speeds. The seal is not established until the doors are completely closed.

Claims

1. In combination with an elevator cab structure, a passenger door assembly comprising:

a) at least one elevator door translationally reciprocally movably mounted on said cab structure adjacent to a cab door opening therein, said door being movable between a door-open position and a door-closed position;

b) a track mounted on said cab structure and engaged by said door, said track providing a guide for said translational door movement;

c) upper and lower horizontally extending first seal means mounted adjacent to upper and lower edges respectively of said cab door opening, said lower first seal means being mounted in a sill portion of said cab door opening;

d) upper and lower second seal means mounted adjacent to said upper and lower edges respectively of said door; and

e) each of said first seal means having first vertically inclined sealing surfaces thereon, and each of said second seal means having vertically inclined sealing surfaces thereon, said sealing surfaces of said second seal means being laterally offset from said sealing surfaces of said first seal means when said door is in said door-open position, and said sealing surfaces of said second seal means being disposed in substantially hermetically sealing engagement with said sealing surfaces of said first seal means when said door is in said door-closed position.

2. The combination of claim 1 wherein said lower second seal means is mounted on an edge of said door which nests in said sill portion of said cab door opening.

3. The combination of claim 1 wherein there are two separate cab doors which are reciprocally slidable on said track in opposite directions relative to each other to open and close said door opening;

each of said doors having said seal means mounted thereon with respective said sealing surfaces of said second seal means; and

wherein said first seal means comprises a gasket mounted above said door opening, said gasket having oppositely extending tapered first sealing surfaces, said gasket being mounted adjacent to said door opening between said doors, and said oppositely extending tapered first sealing surfaces tapering upwardly and outwardly toward opposite vertical sides of said door opening.

4. The combination of claim 3 wherein each of said cab doors comprises upper and lower edge sealing brackets;

and wherein there are upper and lower complementary sealing gaskets mounted on said cab above and below said door opening between said doors.

5. In combination with an elevator cab structure, a passenger door assembly comprising:

a) a pair of separate cab doors translationally reciprocally movably mounted on said cab structure adjacent to a door opening therein, said doors being movable in opposite directions relative to each other between a door-open position and a door-closed position;

b) a track mounted on said cab structure for providing a guide for said translational door movement;

c) a first horizontally extending seal means comprising a gasket mounted above said door opening on said cab structure adjacent to said door opening, said gasket having oppositely extending tapered first sealing surfaces, said gasket being mounted adjacent to said door opening between said doors, and said oppositely extending tapered first sealing surfaces tapering upwardly and outwardly toward opposite vertical sides of said door opening; and

d) second horizontally extending seal means mounted on each of said cab doors adjacent to horizontal edges thereof, said second seal means having second vertically inclined sealing surfaces thereon, said second sealing surfaces being laterally offset from said first sealing surfaces when said doors are in said door-open position, and said second sealing surface being disposed in substantially hermetically sealing engagement with said first sealing surfaces when said doors are in said door-closed position.

6. The combination of claim 5 wherein each of said cab doors comprises upper and lower edge sealing brackets;

and wherein there are upper and lower complementary sealing gaskets mounted on said cab above and below said door opening between said doors.

7. An elevator system comprising:

a) a passenger cab including an entrance opening formed in one wall thereof;

b) a track mounted on said cab above said entrance opening;

c) a sealing gasket mounted on said cab adjacent to said track, said gasket including opposed gasket sealing surfaces on one side thereof which taper toward opposite sides of said gasket;

d) a pair of doors mounted on said track for sliding movement thereon;

said doors being movable between a spaced apart entrance-open position, and an abutting entrance-closed position;

e) sealing brackets mounted on each door opposite to said sealing gasket, each sealing bracket having bracket sealing surfaces thereon which are positioned to abut a complementary one of said gasket sealing surfaces when said doors are in said entrance-closed position whereby at least one horizontal edge of said entrance opening is sealed against passage of hoistway air; and

f) a sill means at lower horizontal edge of said entrance opening;

a sill gasket mounted on said sill means, said sill gasket comprising oppositely tapered sill gasket sealing surfaces thereon; and

sill brackets mounted on said doors, said sill brackets each having sill bracket sealing surfaces thereon translationally aligned with complementary ones of said sill gasket sealing surfaces whereby said sill gasket and said sill brackets will combine to seal said entrance sill against hoistway air when said doors are in said entrance-closed position.