Elevator landing door leaf

Patent metadata

Field	Value
Publication number	US-10773928-B2
Application number	US-201715788962-A
Country	US
Kind code	B2
Filing date	Oct 20, 2017
Priority date	Apr 28, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

The invention refers to an elevator door leaf comprising a door panel and a support structure having at least one profile. The door leaf comprises a vertically extending expansion member which is fixed to the door leaf only at one vertical level, whereby the expansion member consists of a material having a larger thermal expansion coefficient than the material of the door panel and/or of said profile.

First claim

The invention claimed is:

1. An elevator door leaf comprising:
a door panel;
a support structure configured to carry the door panel, the supporting structure including at least one profile; and
a vertically extending expansion member extending vertically from a top of the support structure to a bottom of the support structure in a direction of a length of the elevator door leaf such that only an upper end of the vertically extending expansion member is fixed to the top of the support structure, a material of the vertically extending expansion member having a larger thermal expansion coefficient than a material of one or more of the door panel and the at least one profile such that, in response to expansion of the vertically extending expansion member, a lower end of the vertically extending expansion member is repositioned from a first position to a second position downwards towards a door sill at a bottom of the elevator door leaf, the first position being a position in which the vertically extending expansion member does not interact with the door sill and the second position being a position in which the vertically extending expansion member interacts with the door sill.

2. The elevator door leaf according to claim 1 , wherein, in response to a temperature of the expansion member reaching a critical temperature, the vertically extending expansion member is configured protrude a distance d from a bottom edge of the elevator door leaf to interact with the door sill to horizontally fix a side edge of the elevator door leaf to the door sill.

3. The elevator door leaf according to claim 2 , wherein the at least one profile is at a leading edge of the elevator door leaf in a closing direction of the elevator door leaf.

4. The elevator door leaf according to claim 1 , wherein the at least one profile vertically extends in an area of a side edge of the elevator door leaf, and the vertically extending expansion member is within the at least one profile.

5. The elevator door leaf according to claim 4 , wherein the at least one profile is a hollow profile and that the vertically extending expansion member is located inside the hollow profile.

6. The elevator door leaf according to claim 4 , wherein
the material of the at least one profile is steel, and
the material of the vertically extending expansion member is aluminium.

7. The elevator door leaf according to claim 1 , wherein the vertically extending expansion member is at a leading side edge of the elevator door leaf in a closing direction of the elevator door leaf.

8. The elevator door leaf according to claim 1 , wherein only the upper end of the vertically extending expansion member is fixed to the elevator door leaf.

9. The elevator door leaf according to claim 1 , wherein the vertically extending expansion member is a beam.

10. The elevator door leaf according to claim 1 , wherein, at room temperature, the lower end of the vertically extending expansion member is positioned in the first position abutting with a lower end of the at least one profile and/or with a bottom edge of the elevator door leaf.

11. The elevator door leaf according to claim 1 , wherein the material of the expansion member includes aluminium, magnesium or a composite structure having FI-Block® material.

12. An elevator door arrangement comprising:
an upper support member carrying the elevator door leaf according to claim 1 ; and
the door sill at the bottom of the elevator door leaf, the door sill including a structure configured to interact with the lower end of the vertically extending expansion member.

13. The elevator door arrangement according to claim 12 , wherein
the structure includes at least one recess in the door sill, and
the lower end of the vertically extending expansion member is configured to interact with the at least one recess in the door sill.

14. The elevator door arrangement according to claim 12 , wherein
the elevator door leaf includes at least two elevator door leaves configured to move in opposite directions while being carried by the upper support member, and
the profile and the vertically expending expansion member of each of the at least two elevator door leaves being located at a side edge of respective ones of the at least two elevator door leaves which, when the door panel is closed, a first one of the at least two elevator door leaves abuts against a side edge of a second one of the at least two elevator door leaves moving in an opposite direction.

15. The elevator door arrangement according to claim 12 , wherein
the structure includes a guide groove of the door sill, and
the lower end of the vertically extending expansion member is configured to interact with the guide groove in the door sill.

16. The elevator door leaf according to claim 1 , wherein a lower end of the vertically extending expansion member has a first surface having a first shape, and the door sill has second surface having a second shape such that the first surface and the second surface interlock in response to expansion of the vertically extending expansion member downwards towards the door sill.

17. The elevator door leaf of claim 16 , wherein upon expansion of the vertically extending expansion member downwards towards the door sill, the upper end of the expansion member is fixed to the elevator door leaf and the lower end of the expansion member is fixed to the door sill.

18. The elevator door arrangement of claim 14 , wherein upon expansion of the vertically extending expansion member associated with each of the at least two elevator door leaves downwards towards the door sill, the upper end of the vertically extending expansion member of each of the at least two elevator door leaves is fixed to a respective one of the at least two elevator door leaves and the lower end of the vertically extending expansion member of each of the at least two elevator door leaves is fixed to the door sill.

19. The elevator door leaf according to claim 1 , wherein the lower end of the expansion member is configured to selectively extend from the first position to the second position below the bottom of the support structure to interact with at least one recess in the door sill at the bottom of the elevator door leaf.

20. The elevator door leaf according to claim 1 , wherein
the at least one profile includes at least a first horizontal profile and a second horizontal profile connected to a top and a bottom of the door panel, respectively, and at least one vertical profile extending vertically from the first horizontal profile to the second horizontal profile such that a top of the at least one vertical profile is connected to the first horizontal profile; and
the vertically extending expansion member extends vertically from the first horizontal profile to the second horizontal profile in the direction of the length of the elevator door leaf such that only the upper end of the vertically extending expansion member is fixed to the top of the at least one vertical profile the elevator door leaf.

21. An elevator comprising:
at least one elevator door leaf according to claim 1 .

22. The elevator door arrangement comprising:
at least one door elevator leaf according to claim 12 .

23. An elevator door leaf comprising:
a door panel;
a support structure configured to carry the door panel, the supporting structure including at least one profile; and
an expansion member at a leading side edge of the elevator door leaf in a closing directio

Assignees

• Kone Corp

Inventors

• Haikonen Aki
• Kuronen Mikko

Classifications

• B66B13/303 Primary

  Details of door panels · CPC title