Elevator car

1. An elevator car defining an interior space for accommodating passengers, the elevator car comprising:

an openable roof;

a ceiling;

horizontal roof guide rails arranged on a top side of the elevator car below the openable roof;

a support structure pivotably mounted to the guide rails by a first joint; and

a working platform pivotably and movably mounted to the support structure by a second joint arranged at a distance from the first joint,

wherein the working platform is pivotable between a fully retracted position, in which said working platform is oriented adjacent to and parallel to the guide rails on the top side of the elevator car, below the openable roof, and a deployed position, in which the working platform is in the interior space, at a distance from the guide rails,

wherein the first joint is arranged to move along the guide rails, and

wherein the support structure and the working platform, when in the retracted position, are arranged to lie between the openable roof and the ceiling of the elevator car.

2. The elevator car as claimed in claim 1 , wherein the roof guide rails extend over an entire length of the openable roof.

3. The elevator car as claimed in claim 1 , wherein the first joint is attached pivotably to a carriage-that is movable along the guide rails.

4. The elevator car as claimed in claim 3 , wherein the support structure comprises a framework that includes suspension bars, each of the suspension bars being arranged between the first joint and a third joint, the elevator car further comprising a locking mechanism at the carriage to prevent movement of the first joints along the horizontal roof guide rails when the suspension bars are in an upright position.

5. The elevator car as claimed in claim 1 , wherein the length of the working platform is not more than 50% of the length of the support structure.

6. The elevator car as claimed in claim 1 , wherein a ladder is arranged pivotably to the working platform, on an opposite side thereof in relation to the support structure, the ladder extending from the working platform towards a floor of the elevator car when the working platform is in the deployed position.

7. The elevator car as claimed in claim 6 , wherein the ladder is arranged to extend against the floor and create a support for the working platform in the deployed position.

8. The elevator car as claimed in claim 6 , wherein a ladder diagonal support is arranged to control movement of the ladder during movement of the working platform between the retracted position and the deployed position.

9. The elevator car as claimed in claim 1 , wherein the working platform is pivotable between the retracted position and the deployed position independent of opening the roof.

10. An elevator car defining an interior space for accommodating passengers, the elevator car comprising:

an openable roof;

horizontal roof guide rails arranged on a top side of the elevator car;

a support structure pivotably mounted to the guide rails by a first joint; and

a working platform pivotably and movably mounted to the support structure by a second joint arranged at a distance from the first joint,

wherein the working platform is pivotable between a retracted position, in which said working platform is oriented adjacent to the guide rails on the top side of the elevator car, and a deployed position, in which the working platform is in the interior space, at a distance from the guide rails, and

wherein the first joint is arranged to move along the guide rails,

wherein the support structure comprises a framework that includes first suspension bars, each of the suspension bars being arranged between the first joint and a third joint.

11. The elevator car as claimed in claim 10 , wherein the first suspension bar has an invariable length.

12. The elevator car as claimed in claim 10 , wherein the support structure comprises at least one transversally arranged element connected to the first suspension bars between the first joint and the third joint, creating a guard rail for the working platform in the deployed position thereof.

13. The elevator car as claimed in claim 10 , wherein the framework comprises a first upper connecting element arranged between two first joints.

14. The elevator car as claimed in claim 10 , wherein the framework comprises a lower connecting element arranged between two third joints.

15. The elevator car as claimed in claim 14 , wherein the support structure comprises a centre guide extending between the lower connecting element and the transversally arranged element.

16. The elevator car as claimed in claim 15 , wherein the working platform is movably and pivotably connected to the centre guide by the second joint.

17. An elevator car defining an interior space for accommodating passengers, the elevator car comprising:

an openable roof;

horizontal roof guide rails arranged on a top side of the elevator car;

a support structure pivotably mounted to the guide rails by a first joint; and

a working platform pivotably and movably mounted to the support structure by a second joint arranged at a distance from the first joint,

wherein the working platform is pivotable between a retracted position, in which said working platform is oriented adjacent to the guide rails on the top side of the elevator car, and a deployed position, in which the working platform is in the interior space, at a distance from the guide rails, and

wherein the first joint is arranged to move along the guide rails,

the elevator car further comprising a first diagonal support element arranged movably and pivotally to the guide rails, and pivotally to the support structure, the first diagonal support element-connecting diagonally the support structure to the guide rails when the working platform is in the deployed position.

18. The elevator car as claimed in claim 17 , wherein a second upper connecting element is arranged to connect two first diagonal support elements at the guide rails.

19. The elevator car as claimed in claim 17 , comprising a second diagonal support element arranged movably and pivotally to the guide rails and pivotally to the support structure, the second diagonal support element connecting diagonally the support structure to the guide rails when the working platform is in the deployed position, the second diagonal support element actuating the locking mechanism to prevent movement of the first joints along the horizontal roof guide rails when the suspension bars-are in an upright position.

20. An elevator car defining an interior space for accommodating passengers, the elevator car comprising:

an openable roof;

horizontal roof guide rails arranged on a top side of the elevator car;

a support structure pivotably mounted to the guide rails by a first joint; and

a working platform pivotably and movably mounted to the support structure by a second joint arranged at a distance from the first joint,

wherein the working platform is pivotable between a retracted position, in which said working platform is oriented adjacent to the guide rails on the top side of the elevator car, and a deployed position, in which the working platform is in the interior space, at a distance from the guide rails,

wherein the first joint is arranged to move along the guide rails,

wherein a ladder is arranged pivotably to the working platform, on an opposite side thereof in relation to the support structure, the ladder extending from the working platform towards a floor of the elevator car when the working platform is in the deployed position, and

wherein the width of the ladder is smaller than the width of the working platform, and the ladder is arranged asymmetrically in relation to the working platform.

21. The elevator car as claimed in claim 20 , comprising an equipment unit arranged to lie next to the ladder when the working platform is in the retracted position.

22. The elevator car as claimed in claim 21 , wherein the equipment unit is attached to the elevator car by a hinge system, and wherein the equipment unit is pivotally movable from next to the ladder to a position inside the interior space of the elevator car.