Elevator car with foldable working platform

Patent metadata

Field	Value
Publication number	US-11945684-B2
Application number	US-202217984003-A
Country	US
Kind code	B2
Filing date	Nov 9, 2022
Priority date	Jul 4, 2022
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

An elevator car ( 1 ) defines an interior space ( 2 ) for accommodating passengers and/or cargo. The elevator car ( 1 ) includes a support frame ( 8 ) positioned above the interior space ( 2 ), a working platform ( 12 ) moveable between a stowed position, above the interior space ( 2 ), and an operational position, suspended within the interior space ( 2 ), and at least one suspension arrangement ( 14 ) arranged to suspend the working platform ( 12 ) from the support frame ( 8 ). The working platform ( 12 ) includes a platform opening ( 15 ) and a platform emergency escape door ( 13 ). The platform emergency escape door ( 13 ) is movable between a closed position in which the platform door ( 13 ) covers the platform opening ( 15 ) and an open position in which the platform emergency escape door ( 13 ) at least partially does not cover the platform opening ( 15 ).

First claim

What is claimed is:

1. An elevator car defining an interior space for accommodating passengers and/or cargo, the elevator car comprising:
a support frame positioned above the interior space;
a working platform moveable between a stowed position, above the interior space, and an operational position, suspended within the interior space; and
at least one suspension arrangement arranged to suspend the working platform from the support frame;
wherein the working platform comprises a platform opening and a platform emergency escape door, wherein the platform emergency escape door is movable between a closed position in which the platform door covers the platform opening and an open position in which the platform emergency escape door at least partially uncovers the platform opening;
further comprising a concealing panel, configured to conceal the working platform when the working platform is in the stowed position;
wherein the concealing panel comprises a panel opening and a panel emergency escape door, wherein the panel emergency escape door is movable between a closed position in which the panel emergency escape door covers the panel opening and an open position in which the panel emergency escape door at least partially uncovers the panel opening, wherein the panel emergency escape door is slidably connected to the concealing panel and slides between the closed position and open position; and
wherein the platform opening and the panel opening are substantially aligned when the working platform is in the stowed position,
wherein the concealing panel is pivotally secured to the support frame, wherein the concealing panel is configured to pivot down to an open position.

2. The elevator car of claim 1 , wherein the platform emergency escape door is hinged.

3. The elevator car of claim 2 , wherein the platform emergency escape door is hinged to open outwards, in a direction away from the interior space of the elevator car.

4. The elevator car of claim 1 , wherein the platform emergency escape door comprises at least two door panels, hinged to open away from each other.

5. The elevator car of claim 1 , wherein the working platform further comprises a counterforce generator configured to provide a counterforce in an upwards vertical direction, and thereby hoist the working platform in the upwards vertical direction.

6. The elevator car of claim 5 , wherein the counterforce generator is located at a first position on the working platform, and the platform emergency escape door is located at a second position on the working platform, different to the first position.

7. The elevator car of claim 5 , further comprising a tension member connected to the working platform and to the counterforce generator so as to transmit the counterforce;
wherein the counterforce generator is a hoisting device and the tension member is arranged such that a suspending portion of the tension member suspends the working platform; and
wherein the hoisting device is configured, when actuated, to alter the length of the suspending portion, so as to hoist the working platform between the stowed position and the operational position.

8. The elevator car of claim 7 , wherein the counterforce generator is a hoisting device that is rotationally driven to alter the length of the suspending portion.

9. The elevator car of claim 7 , wherein the counterforce generator comprises at least one counterweight and the tension member is fixed at one end to the at least one counterweight and connected to the working platform such that, as the at least one counterweight moves downwards vertically relative to the elevator car, the working platform is hoisted from the operational position to the stowed position.

10. The elevator car of claim 5 , wherein the counterforce generator comprises at least one spring element and the spring element is arranged to be compressed as the working platform is moved from the stowed position to the operational position, and thereby provide the counterforce acting to move the working platform from the operational position to the stowed position.

11. The elevator car of claim 1 , further comprising a ladder and wherein the support frame comprises a mounting location configured for storing the ladder.

12. The elevator car of claim 1 , wherein the platform opening and the panel opening each have an area of at least 0.25 m 2 .

Assignees

• Otis Elevator Co

Inventors

• Fauconnet Aurelien
• Beauchaud Frederic

Classifications

• B66B11/0246 Primary

  Maintenance features (devices facilitating maintenance in general B66B5/0087) · CPC title

• B66B5/0087

  Devices facilitating maintenance, repair or inspection tasks (devices incorporated in the buffer B66B5/288; railings on top of the car B66B11/0226) · CPC title

• B66B11/0206

  Car frames · CPC title

• B66B5/027

  to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door · CPC title

• B66B5/00

  Applications of checking, fault-correcting, or safety devices in elevators · CPC title