Abstract
A planar elevator car element for an elevator installation may include a first cover layer, a second cover layer, and an intermediate layer. The intermediate layer may have a lesser density than the first cover layer. Furthermore, the planar elevator car element may include a frame profiled element disposed along at least one of its edges, which is positioned between the first cover layer and the second cover layer. In some examples, the frame profiled element extends around multiple edges of the planar elevator car element. In a method for producing the planar elevator car element, a stack involving the first cover layer, the second cover layer, the intermediate layer, and the frame profiled element may be heated and thereby joined into a structural part.
Claims
1.-13. (canceled)
14. A planar elevator car element for an elevator installation comprising: a first cover layer; a second cover layer; an intermediate layer disposed between the first cover layer and the second cover layer, wherein the intermediate layer has a lesser density than the first cover layer; and a frame profiled element disposed along an edge between the first cover layer and the second cover layer.
15. The planar elevator car element of claim 14 wherein the frame profiled element extends around multiple edges of the planar elevator car element.
16. The planar elevator car element of claim 14 comprising a structural part that is integrated in the frame profiled element.
17. The planar elevator car element of claim 14 wherein the structural part is a cable duct.
18. The planar elevator car element of claim 14 wherein the structural part is a light grid.
19. The planar elevator car element of claim 14 wherein the intermediate layer comprises a first recess and the first cover layer comprises a second recess, wherein the second recess is disposed in a region of the first recess, wherein a component is received in the first recess.
20. The planar elevator car element of claim 19 wherein the second recess is covered at least in part by a reinforcing element.
21. The planar elevator car element of claim 19 wherein the component is embedded in a reinforcing material.
22. The planar elevator car element of claim 19 wherein the second cover layer comprises a reinforcement disposed opposite the first recess.
23. The planar elevator car element of claim 14 wherein the intermediate layer comprises a first recess and the first cover layer comprises an indentation, wherein the indentation is disposed in a region of the first recess, wherein a component is received in the indentation.
24. The planar elevator car element of claim 21 wherein the indentation is covered at least in part by a reinforcing element.
25. The planar elevator car element of claim 21 wherein the component is embedded in a reinforcing material.
26. The planar elevator car element of claim 21 wherein the second cover layer comprises a reinforcement disposed opposite the first recess.
27. An elevator car for an elevator installation with two adjacently disposed planar elevator car elements, wherein each of the adjacently disposed planar elevator car elements comprises: a first cover layer; a second cover layer; an intermediate layer disposed between the first cover layer and the second cover layer, wherein the intermediate layer has a lesser density than the first cover layer; and a frame profiled element disposed along an edge between the first cover layer and the second cover layer.
28. A method for producing a planar elevator car element comprising an intermediate layer disposed between a first cover layer and a second cover layer, with the intermediate layer having a lesser density than the first cover layer, and a frame profiled element, the method comprising: positioning the first cover layer, the second cover layer, the intermediate layer, and the frame profiled element in a stack so that the frame profiled element and the intermediate layer are between the first and second cover layers, with the frame profiled element being disposed along an edge; and heating the stack under pressure such that the first cover layer, the second cover layer, the intermediate layer, and the frame profiled element are joined into a structural part.
Description
[0022] The invention shall be explained more closely with the aid of the figures. There are shown
[0023] FIG. 1, a three-dimensional schematic representation of an elevator car;
[0024] FIG. 2, a cross section through a planar elevator car element;
[0025] FIG. 3, a side view of the planar elevator car element in two variant embodiments;
[0026] FIG. 4, an exploded view of a door leaf according to the invention;
[0027] FIG. 5, a cross section through a door leaf in an alternative variant embodiment;
[0028] FIG. 6, a schematic representation of a press for production of a planar elevator car element according to the invention;
[0029] FIG. 7, a schematic representation of an elevator car wall.
[0030] FIG. 1 shows a three-dimensional representation of an elevator car 1 for an elevator installation. The elevator car 1 comprises several wall panels 3, as well as an elevator car floor 5 and an elevator car ceiling. In the front area, the elevator car 1 is outfitted with an elevator car door 7. The elevator car door 7 is designed as a sliding door on either side and comprises four door leaves 9 (two inner door leaves 11 and two outer door leaves 13). In the lower area of the elevator car door 7 there is mounted an elevator car apron 16. Both the door leaves 9 and the wall panels 3 are designed as a planar elevator car element according to the invention, as is described more closely with the aid of the following drawings.
[0031] FIG. 2 shows a cross section through a planar elevator car element 15, for example a door leaf 9. The planar elevator car element 15 comprises a first cover layer 17, a second cover layer 19 and an intermediate layer 21, which is arranged between the first cover layer 17 and the second cover layer 19. The intermediate layer 21 here has a lesser density than the first cover layer and the second cover layer. Thus, it involves a so-called sandwich construction, in which an intermediate layer 21 of lesser density is enclosed by two more stable layers of higher density. This construction has the benefit of producing a very light, yet still stable planar elevator car element 15. For this purpose, the first cover layer and/or the second cover layer contain a fiber-reinforced plastic. In particular, this may be a carbon fiber plastic (CFK), glass fiber plastic (GFK) or aramid fiber plastic (AFK). Alternatively, fiber-reinforced plastics with natural fibers can also be used. The plastic is typically polyurethane. Other plastics are likewise possible. As a further variant, the first cover layer and/or the second cover layer may contain aluminum or another light metal. The intermediate layer 21 with lesser density preferably comprises a plastic foam.
[0032] Along two edges the planar elevator car element 15 comprises two frame profiled elements 23a, 23b. The two frame profiled elements 23a and 23b are arranged in this case between the first cover layer 17 and the second cover layer 19. In a side view of the planar elevator car element 15, the observer consequently sees only one of the cover layers 17 or 19. The frame profiled elements 23a, 23b cannot be recognized when viewed from the side. Thus, a uniform surface is presented to the viewer. The frame profiled elements 23a, 23b have the function of strengthening and stabilizing the edge along which they extend. Furthermore, the frame profiled elements 23a, 23b serve to ensure a simple installation of the planar elevator car element 15 when assembling the elevator car 1. For example, adjacently disposed planar elevator car elements 15 may be joined together by screws or other connection means engaging with the respective frame profiled elements 23a, 23b of the planar elevator car elements 15. The frame profiled elements 23a, 23b are typically designed as hollow profiles, so that they are both relatively light and also provide a sufficient stability to the planar elevator car element 15.
[0033] Moreover, FIG. 2 shows a structural part 25a which is integrated in the frame profiled element 25a. The structural part 25a constitutes a light grid 29. Along the opposite edge, the planar elevator car element comprises a frame profiled element 23b in which a cable duct 27 is integrated. Through the cable duct 27 is led a cable 31, which connects the light grid 29 to a power source.
[0034] FIG. 3 shows as an example a side view of two planar elevator car elements 15. In this view, only the first cover layer 17 is recognizable to the viewer. Behind the first cover layer the two planar elevator car elements 15 each comprise frame profiled elements. Since the frame profiled elements are not visible, they are indicated by broken lines in FIG. 3. While the left planar elevator car element 15 comprises a frame profiled element 23, which extends around the edges of the elevator car element 15, the right planar elevator car element 15 comprises two frame profiled elements 23a, 23b, which extend along opposite edges of the planar elevator car element 15.
[0035] FIG. 4 shows an exploded view of a door leaf 11 according to the invention. In particular, this constitutes an inner door leaf 11 of a sliding door. The door leaf 11 is one variant of a planar elevator car element 15. The door leaf 11 comprises a first cover layer 17 and a second cover layer 19. Between the first cover layer 17 and the second cover layer 19 is arranged an intermediate layer 21. A frame profiled element 23 is arranged around the edges of the door leaf 9. At the corners, additional stiffeners 33 are placed. The stiffeners 33 serve at the same time as mounting elements for connecting the door leaf 9 to neighboring components. In the middle, the intermediate layer 21 of the door leaf 11 comprises a first recess 37. The first cover layer 17 comprises a second recess 35 in the region of the first recess 37. A component 39 is received in the first recess 37. In this case, the component 39 extends through the second recess 35 in the first cover layer 17 and is received in the first recess of the intermediate layer 21. The component 39 is embedded in a reinforcing material 41. Since the intermediate layer 21 has a lesser density and comprises, for example, a plastic foam, the intermediate layer 21 is too soft to enable a stable fastening of the component 39. This function is performed by the reinforcing material 41, which joins the component 39 to the two more stable cover layers 17 and 19. Due to the second recess 35 in the first cover layer 17, the stability of the door leaf 11 is reduced in the region of the second recess 35. In order to compensate for this, at least in part, the second cover layer 19 comprises a reinforcement 43, situated opposite the second recess 35 of the first cover layer 17. Alternatively or additionally, the second recess 35 may be covered at least partly by a reinforcing element 45. In the present case, the reinforcing element 45 covers the second recess 35 again, at least for a portion, so that the first cover layer 10 regains at least a portion of its stability which it lost because of the second recess 35. The component 39 in the variant represented in FIG. 4 is a coupling element for connecting an inner door leaf of a sliding door to the corresponding outer door leaf of the sliding door.
[0036] FIG. 5 shows an alternative variant embodiment of a door leaf 9. The door leaf comprises a first cover layer 17, a second cover layer 19 and an intermediate layer 21, which is arranged between the first cover layer 17 and the second cover layer 19. Along the opposite edges of the door leaf 9, the door leaf 9 comprises a frame profiled element 23, which is arranged between the first cover layer 17 and the second cover layer 19. In the middle, the intermediate layer 21 comprises a first recess 37 and the first cover layer 17 comprises an indentation 47, the indentation 47 being arranged in the region of the first recess 37. A component 39 is received in the indentation 47. Unlike the variant embodiment of FIG. 4, in this case the first cover layer 17 is not pierced by a second recess. Instead, an indentation 47 was impressed in the first cover layer 17 during the production of the door leaf. The component 39 is arranged at the site of this indentation 47, so that the component 39 is in contact with the deepened region of the first cover layer 17. This has the advantage that the reinforcing material 41 (see FIG. 4) can be omitted. Of course, the reinforcing material 41 can be arranged additionally between the first cover layer 17 and the second cover layer 19 in the area of the indentation 47. The impression of an indentation 47 also results in a certain structural weakening of the door leaf 9 in this region, so that an additional reinforcement may be required. In the variant of FIG. 5, the indentation 47 is partly covered by a strip-shaped reinforcing element 45 for additional reinforcement. The reinforcing element 45 is situated in a plane with the other portion of the first cover layer 17 and as it were partly closes once more the region of the indentation 47.
[0037] The component 39, shown enlarged at the left side of FIG. 5, is a coupling element for connecting an inner door leaf of a sliding door to the corresponding outer door leaf of the sliding door.
[0038] FIG. 6 shows schematically a press 49 for production of a planar elevator car element according to the invention. In a pressing area 51 of the press 49, there have been arranged in a stack a first cover layer 17, a second cover layer 19, an intermediate layer 21 and two frame profiled elements 23a and 23b, with the frame profiled elements 23a and 23b each extending along at least one edge of the stack. During the production process, the stack is pressed against the mold 55 with the aid of the upper stamp 53. At the same time, both the stamp 53 and the mold 55 are heated above the melting point of the respectively adjacent cover layer with the aid of the heating device 56. During the pressing process, therefore, the first cover layer and the second cover layer fuse with the components situated in between. In this way, the entire stack is joined into a structural part. This production process may involve additional method steps, depending on the more precise configuration of the planar elevator car element. For example, in order to produce the planar elevator car element 9 shown in FIG. 4, the reinforcing material 41 and the reinforcement 43 are also introduced into the stack being compressed. The component 39 and the reinforcing element 45 may likewise be inserted into the stack being compressed or they can also be mounted later on after the pressing process. For example, when producing the planar elevator car element 9 shown in FIG. 5, the indentation 47 is first produced during the pressing process, for example. For this purpose, the upper stamp 53 comprises the corresponding bulge 57. The first cover layer 17 and the second cover layer 21 may alternatively be cut to exact size before the pressing process or also be provided with an edge overflow. In the second case, the planar elevator car element is further machined after the pressing process in order to ensure a sharp edge contour.
[0039] FIG. 7 shows a schematic representation of an elevator car wall 59 with two adjacently disposed planar elevator car elements 15 in the form of wall panels. Two reinforcing elements extend across the two adjacently disposed planar elevator car elements 15. The upper reinforcing element is designed in the form of a reinforcing web 61. This is bonded over a large area to the two planar elevator car elements 15, such as by gluing. In the lower region, for example, a strip-shaped reinforcing element 63 is shown. This is likewise bonded over a large area to the two planar elevator car elements 15, especially by lamination.
LIST OF REFERENCE SIGNS
[0040] Elevator car 1 [0041] Wall panel 3 [0042] Elevator car floor 5 [0043] Elevator car door 7 [0044] Door leaf 9 [0045] Inner door leaf 11 [0046] Outer door leaf 13 [0047] Planar elevator car element 15 [0048] Elevator car apron 16 [0049] First cover layer 17 [0050] Second cover layer 19 [0051] Intermediate layer 21 [0052] Frame profiled element 23a,23b [0053] Structural part 25a,25b [0054] Cable duct 27 [0055] Light grid 29 [0056] Cable 31 [0057] Stiffeners 33 [0058] Second recess 35 [0059] First recess 37 [0060] Component 39 [0061] Reinforcing material 41 [0062] Reinforcement 43 [0063] Reinforcing element 45 [0064] Indentation 47 [0065] Press 49 [0066] Pressing area 51 [0067] Stamp 53 [0068] Mold 55 [0069] Heating device 56 [0070] Bulge 57 [0071] Elevator car wall 59 [0072] Reinforcing web 61 [0073] Strip-shaped reinforcing element 63
