CAR DOOR

Abstract

The present disclosure relates to a car door for a lift car having a guide mechanism and a door leaf. The guide mechanism comprises in this case a sliding shoe, which is connected to the door leaf of the car door. Furthermore, the guide mechanism comprises a receiving part which surrounds the sliding shoe on at least three sides. The sliding shoe has, in a sliding direction, an extent which corresponds to at least 30% of the extension of the door leaf in this direction.

Claims

1. A car door for a lift car, the car door comprising: a guide mechanism and a door leaf; wherein the guide mechanism comprises a sliding shoe, which is connected to the door leaf of the car door, and a receiving part which surrounds the sliding shoe on at least three sides, wherein the sliding shoe has, in a sliding direction, an extent which corresponds to at least 30% of the extension of the door leaf in this direction.

2. The car door as claimed in claim 1, wherein the sliding shoe has a friction-reducing inlay on at least one contact surface with the receiving part.

3. The car door as claimed in claim 2, wherein the receiving part consists of plastic at the contact surface with the sliding shoe.

4. The car door as claimed in claim 2, wherein the sliding shoe has along the sliding direction an upper and a lower indentation, so that this results in an H-shaped cross section, and wherein the receiving part has first and second protrusions which extend into the upper and lower indentation in order to fix the sliding shoe in the receiving part.

5. The car door as claimed in claim 4, wherein the sliding shoe is connected to a drive system in order to move the sliding shoe along the sliding direction in the receiving part.

6. The car door as claimed in claim 5, wherein the sliding shoe is connected via a spur gearing to the drive system.

7. The car door as claimed in claim 5, wherein the guide mechanism is an upper guide mechanism, which is arranged at the upper end of the door leaf.

8. The car door as claimed in claim 6, further comprising a lower guide mechanism with a sliding shoe, which is connected to the door leaf of the car door, and with a receiving part which surrounds the sliding shoe on at least three sides, wherein the sliding shoe has, in the sliding direction, an extent which corresponds to at least 30% of the extension of the door leaf in this direction, and wherein the lower guide mechanism is arranged at the lower end of the door leaf.

9. The car door as claimed in claim 8, wherein the sliding shoe of the upper guide mechanism is coupled to the sliding shoe of the lower guide mechanism.

10. The car door as claimed in claim 9, wherein the upper guide mechanism has a track roller connected to the door leaf, wherein the track roller is braced from above against the receiving part of the upper guide mechanism and it rolls along the receiving part during the opening and closing of the car door.

11. The car door as claimed in claim 10, wherein the connection between the door leaf and the upper sliding shoe is designed as a floating bearing in the vertical direction.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0021] The invention is explained more closely with the aid of the figures. There are shown

[0022] FIG. 1 a three-dimensional representation of an upper guide mechanism;

[0023] FIG. 2 a view of a car door;

[0024] FIG. 3 a side view of the upper guide mechanism as per FIG. 1;

[0025] FIG. 4 a side view of a guide mechanism in an alternative embodiment.

DETAILED DESCRIPTION

[0026] FIG. 1 shows a guide mechanism 1 for a car door 3 of a lift car. The guide mechanism 1 is an upper guide mechanism, arranged at the upper end of a door leaf 15. The guide mechanism 1 comprises a sliding shoe 5 which is connected by two connection elements 7 to the door leaf 15 of the car door 3. The connection 41 is designed as a floating bearing in the vertical direction. In particular, it is a pedestal bearing 6, which is connected to the sliding shoe 5. The cylindrical opening of the pedestal bearing 6 is engaged by a bolt 8 oriented in the vertical direction. The sliding shoe 5 is arranged in a receiving part 9 so that it can be moved. The receiving part 9 surrounds the sliding shoe 5 on at least three sides, so that the sliding shoe 5 on the one hand is movable in a sliding direction 11 and in all other directions it is fixed by form fit in the receiving part 9. While the sliding shoe 5 typically has a metal material, the receiving part consists of plastic at least on the contact surface, so as to lessen the sliding friction between sliding shoe 5 and receiving part 9. In the sliding direction 11 the sliding shoe 5 has an extent which is greater than the extension of the door leaf 15 in this direction. The sliding shoe 5 is connected to a drive system 13 (see FIG. 2) in order to move the sliding shoe 5 along the sliding direction 11 in the receiving part 9. The drive system 13 is an electric motor, for example.

[0027] Above the center of gravity of the door leaf 15, the guide mechanism 1 has a track roller 17, which is joined by a connection element 19 to the door leaf 15. The track roller 17 is braced from above against the receiving part 9 and it rolls along the receiving part 9 during the opening and closing of the car door 3. The track roller 17 takes up at least a portion of the weight of the door leaf 15 and channels this into the firmly anchored receiving part 9. In this way, less force is transmitted across the sliding shoe 5, so that the friction forces between sliding shoe 5 and receiving part 9 are reduced. The connection element 19 is not joined to the sliding shoe 5.

[0028] FIG. 2 shows an overall view of a car door 3 with a door leaf 15. The door leaf 15 is outfitted with an upper guide mechanism 1 and a lower guide mechanism 1a. The guide mechanism 1a comprises a sliding shoe 5a which is joined by two connection elements 7a to the door leaf 15 of the car door 3. The sliding shoe 5a is arranged in a receiving part 9a so that it can be moved. The receiving part 9a surrounds the sliding shoe 5a on at least three sides, so that the sliding shoe 5a on the one hand is movable in a sliding direction 11 and in all other directions it is fixed by form fit in the receiving part 9a. In the sliding direction 11 the sliding shoe 5a has an extent which is greater than the extension of the door leaf 15 in this direction. The sliding shoe 5a is connected to a drive system 13 in order to move the sliding shoe 5a along the sliding direction 11 in the receiving part 9. The upper guide mechanism 1 is designed as shown in FIG. 1.

[0029] FIG. 2 furthermore shows that the sliding shoe 5 of the upper guide mechanism 1 is coupled to the sliding shoe 5a of the lower guide mechanism 1a. In the present instance, the coupling is realized mechanically by the connection rod 21. The connection rod 21 has at both ends the spur gearing 31 explained with regard to FIG. 3. The coupling ensures that the upper sliding shoe 5 and the lower sliding shoe 5a are moved synchronously, so that no jamming of the sliding shoes 5, 5a in the receiving parts 9, 9a can occur. The connection rod 21 in addition is connected to a drive system 13 by which the connection rod 21 can be turned.

[0030] Above the center of gravity of the door leaf 15, the guide mechanism 1 has a track roller 17, which is joined by a connection element 19 to the door leaf 15. In the vertical direction, the track roller only limits the movement of the door leaf 15 downward. The door leaf is freely movable upward. This is indicated by the arrow 47. The door leaf 15 is joined to the upper sliding shoe 5 and the lower sliding shoe 5a by the connection elements 7 and 7a and the floating bearings, designed as pedestal bearings 6. Thus, at the connection points 39 the door leaf is freely movable in both vertical directions. This is indicated by the arrows 51. The weight of the door leaf 15 is thus channeled entirely by the suspension point 45 into the track roller, which is braced against the receiving part. In addition, the connection elements 7 and 7a are joined to the pedestal bearings 6 by pivot bearings 49 (see FIG. 3). In FIG. 2, the pivot bearings 49 are concealed by the connection elements 7 and 7a. The pivot bearings 49 enable a turning of the door leaf 15 about a horizontal axis of rotation, which stands perpendicular to the plane of extension of the door leaf 15. This is indicated by the arrows 53. In this way, it is further prevented that any stresses can build up and lead to a jamming of the door leaf 15.

[0031] FIG. 3 shows a side view of the upper guide mechanism as per FIG. 1. It becomes clear from this view that the receiving part 9 has a U-shaped cross section, whose open side is directed toward the connection 41. The connection 41 joins the sliding shoe 5 to the connection element 7. The connection 41 is designed here as a floating bearing 6 in the vertical direction and a pivot bearing 49. In this way, on the one hand a free movement in the vertical direction is made possible and on the other hand a free rotation about the horizontal axis of rotation which stands perpendicular to the plane of extension of the door leaf 15.

[0032] FIG. 3 furthermore shows that the sliding shoe 5 has an upper indentation 23 and a lower indentation 25, so that an H-shaped cross section results. Both indentations 23, 25 extend along the sliding direction 11 over the entire length of the sliding shoe 5. Corresponding to the indentations 23 and 25, the receiving part 9 has a first protrusion 27, which extends into the upper indentation 23, and a second protrusion 29, which extends into the lower indentation 25. Thanks to the engaging of the protrusions 27, 29 in the indentations 23, 25, the sliding shoe 5 is fixed by form fit in the receiving part 9. Only a movement in the sliding direction 11 is still possible.

[0033] For the moving of the sliding shoe 5 in the sliding direction 11, the sliding shoe 5 is connected to a drive system 13. This connection is realized by a spur gearing 31, in which a gearwheel 33 connected to the drive system 13 engages with corresponding pinions 35 in the sliding shoe 5. In this way, the rotational movement of the drive system 13 is converted into a linear movement of the sliding shoe 5. In the present instance, the pinions 35 and the teeth 37 of the gearwheel 33 are fashioned at a slant to the axis of rotation of the drive system 13, in order to prevent tension. The spur gearing 31 is arranged on a side of the sliding shoe 5 which is opposite the connection 41. At the location of the spur gearing 31 there is an opening in the receiving part 9. The teeth 37 of the gearwheel 33 reach through this opening, in order to produce the engagement with the pinions 35 of the sliding shoe 5.

[0034] FIG. 4 shows another embodiment of the invention in a representation similar to FIG. 3. In this variant, the receiving part 9 has a U-shaped cross section, whose open side is directed toward the gearwheel 33. Thus, no opening in the receiving part 9 is needed in order to produce an engagement between the gearwheel 33 and the pinions 35 of the sliding shoe 5. The sliding shoe 5 has two inlays 43 on a contact surface with the receiving part 9, in order to reduce the friction between sliding shoe 5 and receiving part 9. For this, the inlays 43 are made of a plastic, for example.

[0035] In the embodiment of FIG. 4, the sliding shoe 5 has no H-shaped cross section. Instead, the arrangement of the gearwheel 33 ensures that the sliding shoe 5 is fixed by form fit in the receiving part 9 and can only be moved in the sliding direction.

LIST OF REFERENCE NUMBERS

[0036] Guide mechanism 1, 1a [0037] Car door 3 [0038] Sliding shoe 5, 5a [0039] Pedestal bearing 6 [0040] Connection elements (sliding shoe) 7, 7a [0041] Bolt 8 [0042] Receiving part 9, 9a [0043] Sliding direction 11 [0044] Drive system 13 [0045] Door leaf 15 [0046] Track roller 17 [0047] Connection element (track roller) 19 [0048] Connection rod 21 [0049] Upper indentation 23 [0050] Lower indentation 25 [0051] First protrusion 27 [0052] Second protrusion 29 [0053] Spur gearing 31 [0054] Gearwheel 33 [0055] Pinion 35 [0056] Teeth 37 [0057] Connection points 39 [0058] Connection 41 [0059] Inlays 43 [0060] Suspension point 45 [0061] Arrow 47 [0062] Pivot bearing 49 [0063] Arrows 51 [0064] Arrows 53