DOOR DRIVE DEVICE WITH TWO INDEPENDENTLY DISPLACEABLE DRIVERS

Abstract

The invention relates to a door drive device for opening and closing corresponding elevator door leaves of elevator doors. The door drive device may have a first driver actins upon a first coupling element arranged on a first elevator door leaf to open a first elevator door leaf of a first elevator door, and a second driver acting upon a second coupling element arranged on a first elevator door leaf to close the first elevator door leaf. The first and second drivers can be displaced by a drive unit in an opening direction and a closing direction of the first elevator door. The drive unit may have a first drive for displacing the first driver and a second drive for displacing the second driver, and the first and second drivers can be displaced independently of one another in the opening direction and in the closing direction by the drive unit.

Claims

1. Door drive device for opening and closing corresponding elevator door leaves of elevator doors of an elevator in the form of a cabin door leaf of a cabin door and a corresponding shaft door leaf of a shaft door, having a first driver which acts upon a first coupling element arranged on the first elevator door leaf to open a first elevator door leaf of a first elevator door and a second driver which acts upon a second coupling element arranged on the first elevator door leaf to close the first elevator door leaf of the first elevator door, wherein the first driver and the second driver can be displaced by means of a drive unit in an opening direction and a closing direction of the first elevator door wherein: the drive unit has a first drive for displacing the first driver and a second drive for displacing the second driver and the first driver and the second driver can be displaced independently of one another in the opening direction and in the closing direction by means of the drive unit.

2. Door drive device according to claim 1, wherein: the first coupling element arranged on the first elevator door leaf of the first elevator door can be displaced in a first unlocking direction deviating from the opening direction and the closing direction when displaced in the opening direction and is mechanically coupled to a first lock of the first elevator door such that the first lock is unlocked via said displacement of the first coupling element in the first unlocking direction.

3. Door drive device according to claim 1, wherein: the first driver acts upon a third coupling element, arranged on the second elevator door, to open a second elevator door leaf, corresponding to the first elevator door leaf, of a second elevator door, and the second driver acts upon a fourth coupling element arranged on the second elevator door, to close the second elevator door leaf of the second elevator door.

4. Door drive device according to claim 1, wherein: a second elevator door leaf, corresponding to the first elevator door leaf, of a second elevator door is permanently coupled to the drive unit and can thus be displaced directly by the drive unit in the opening direction and in the closing direction.

5. Door drive device according to claim 4, wherein the drive unit has a third drive for displacing the second door leaf of the second elevator door.

6. Door drive device according to claim 1, wherein: at least two of the drives of the drive unit are designed as linear motors which have a common stator and a respective rotor, wherein said rotors are displaceable independently of one another along the common stator.

7. Door drive device according to claim 3, wherein: the first driver can be displaced via a contact with the first coupling element or the third coupling element in a second unlocking direction deviating from the opening direction and the closing direction and is mechanically coupled to a second lock of the second elevator door such that the second lock is unlocked via said displacement of the first driver in the second unlocking direction.

8. Door drive device according to claim 1, wherein: the first elevator door is designed as a shaft door, and the second elevator door is designed as a cabin door.

Description

[0033] In the figures:

[0034] FIG. 1 shows a cabin door of an elevator cabin of an elevator with a door drive device, wherein a cabin door leaf of the cabin door is closed,

[0035] FIG. 2 shows the cabin door from FIG. 1 with a partially opened cabin door leaf,

[0036] FIG. 3 shows a second exemplary embodiment of a cabin door of an elevator cabin of an elevator with a door drive device,

[0037] FIG. 4 shows a mechanically operated first lock for a shaft door leaf of a shaft door, and

[0038] FIG. 5 shows a mechanically operated second lock for a cabin door leaf of a cabin door.

[0039] FIGS. 1 and 2 schematically show a door drive device 12, for a side-opening, single-leaf door, attached to an elevator cabin 10 of an elevator not shown in further detail. The elevator cabin 10 has a door opening 14 which can be closed by a cabin door leaf 16 of a cabin door 17. The door drive device 12 is arranged on a door support 18 attached to the elevator cabin 10. The cabin door leaf 16 is attached to a suspended carriage 20 which is horizontally displaceable along a guide rail 22 fixed to the door support 18 and can be displaced by a drive unit 24 between a door leaf closed position and a door leaf open position.

[0040] The drive unit 24 has an elongated stator 26 running parallel to the guide rail 22. The stator 26 forms, together with a first rotor 28, a first linear motor 30. The first rotor 28 can be displaced along the stator 26 by corresponding control of a control unit (not shown). The first runner 28 is fixedly and thus permanently connected to the suspended carriage 20 and thus coupled to the suspended carriage 20, so that the suspended carriage 20 and thus the cabin door leaf 16 can be displaced directly by the first linear motor 30 and thus by the drive unit 24 to open in an opening direction 32 and to close in a closing direction 34. The opening direction 32 and the closing direction 34 run horizontally and parallel to the guide rail 22 and the stator 26.

[0041] The door drive device 12 serves not only to open and close the cabin door leaf 16, but also to open and close a shaft door leaf 37, corresponding to the cabin door leaf 16, of a shaft door 39 having a first coupling element 36 and a second coupling element 38. The shaft door 39 is represented by the shaft door leaf 37 shown in dashed lines and the two coupling elements 36, 38. The two coupling elements 36 and 38 are designed as rollers and are arranged so that they can rotate freely about an axis of rotation oriented perpendicularly to the shaft door leaf 37. The shaft door 39 can be referred to as a first elevator door, and the shaft door leaf 37 as a first elevator door leaf. The cabin door 17 can be referred to as a second elevator door, and the cabin door leaf 16 as a second elevator door leaf.

[0042] The drive unit 24 has a second rotor 40 on which an elongated first driver 42 is arranged. The second rotor 40, like the first rotor 28, can be displaced along the stator 26 with a corresponding control and, together with the stator 26, forms a second linear motor 44. The drive unit 24 also has a third rotor 46 on which an elongated second driver 48 is arranged. The third rotor 46, like the first rotor 28 and the second rotor 40, can be displaced along the stator 26 and, together with the stator 26, forms a third linear motor 50. The three linear motors 30, 44, and 50 therefore have a common stator 26. The second rotor 40 and the third rotor 46, and thus the first driver 42 and the second driver 48, can be displaced independently of one another along the stator 26.

[0043] The first driver 42 and the second driver 48 are aligned parallel to a displacement direction 51 of the elevator cabin 10 and thus perpendicular to the horizontal opening direction 32 and closing direction 34. The elongated shape makes it possible to start opening the shaft door leaf 37 before the elevator cabin 10 has reached its final position at a floor.

[0044] In FIG. 1, the cabin door leaf 16 and the corresponding shaft door leaf 37 are completely closed. The two drivers 42 and 48 are positioned such that they can be guided between the two coupling elements 36 and 38 in the displacement direction 51 of the elevator cabin 10. This allows the elevator cabin 10 to be displaced past a floor, and thus past a shaft door with a shaft door leaf, without there being any contact between the door drive device 12 and the shaft door leaf. Starting from the position of the aforementioned components shown in FIG. 1, the cabin door leaf 16 and the corresponding shaft door leaf 37 can be opened.

[0045] The first driver 42 and the first coupling element 36 are arranged relative to one another in such a way that, as soon as the elevator cabin 10 is at or shortly before its final position at a floor, the first driver 42 can act upon the first coupling element 36 in such a way that the shaft door leaf 37 can be displaced in the opening direction 32 via the first driver 42. The first driver 42 then rests on the first coupling element 36 as shown in FIG. 2 and transmits a force, applied by the second linear motor 44, to the coupling element 36 in the opening direction 32. This positioning of the first driver 42 relative to the first coupling element 36 is shown in FIG. 2, in which the cabin door leaf 16 and the corresponding shaft door leaf 37 are partially opened.

[0046] In order to open the shaft door leaf starting from the position of the individual components shown in FIG. 1, the first driver 42 is displaced in the opening direction 32 by means of the second linear motor 44 until it rests on the first coupling element 36. In the event of a further displacement in the opening direction 32, the first driver 42 acts upon the first coupling element 36 and displaces the first coupling element 36 and thus the shaft door leaf 37 in the opening direction 32. This opens the shaft door leaf 37. At the same time, the cabin door leaf 16 is opened synchronously with the shaft door leaf 37 by means of the first linear motor 30.

[0047] Before the shaft door leaf 37 and the cabin door leaf 16 are opened, a first lock of the shaft door leaf (not shown in FIGS. 1 and 2) and a second lock of the cabin door leaf 16 (also not shown) are opened by means of an actuator.

[0048] In order to close the shaft door leaf 16 again, a force is exerted on the second driver 38 in the closing direction 34 via the second driver 48, which can be displaced by the third linear motor 50. The second driver 48 thus acts in the closing direction 34 upon the second driver 38 and thus upon the shaft door leaf 37 and displaces them back into the closed position shown in FIG. 1. At the same time, the cabin door leaf 16 is closed synchronously with the shaft door leaf 37 by means of the first linear motor 30. After the shaft door leaf 37 and the cabin door leaf 16 have been closed, the two drivers 42 and 48 are moved towards each other so that they also assume the position shown in FIG. 1, in which they can be guided between the two coupling elements 36 and 38. Finally, the first lock of the shaft door leaf 37 and the second lock of the cabin door leaf 16 are locked.

[0049] The door drive device 112 shown in FIG. 3 is constructed very similarly to the door drive device 12 in FIG. 1 and FIG. 2, which is why only the differences between the two door drive devices will be discussed.

[0050] In the door drive device 112 according to FIG. 3, the cabin door leaf 116 is not permanently coupled to a drive unit 124. Instead, a third coupling element 141 and a fourth coupling element 143 are arranged on a suspended carriage 120 and thus on a component, permanently connected to the cabin door leaf 116, of the cabin door 117. The third coupling element 141 is designed and arranged in the same way as the first coupling element 136 on the shaft door leaf 137, and the fourth coupling element 143 is designed and arranged in the same way as the second coupling element 138 on the shaft door leaf 137. A first driver 142 can thus act not only upon the first coupling element 136 on the shaft door leaf 137, but, simultaneously, also upon the third coupling element 141 on the cabin door leaf 116, and thus displace not only the shaft door leaf 137, but, simultaneously, also the cabin door leaf 116 in the opening direction 32. In the same way, a second driver 148 can thus act not only upon the second coupling element 138 on the shaft door leaf 137, but, simultaneously, also upon the fourth coupling element 143 on the cabin door leaf 116, and thus displace not only the shaft door leaf 137, but, simultaneously, also the cabin door leaf 116 in the closing direction 34.

[0051] The drive unit 124 does not have three linear motors like the drive unit 24 of FIGS. 1 and 2, but two electric motors 152, 154, each with a rotating output shaft. The first electric motor 152 is connected to the first driver 142 via a first, linearly acting, rotating drive means 156. The drive means 156 can be a toothed belt, a flat belt, a V-belt, or even a roller chain. This allows the first driver 142 to be displaced by the first electric motor 152 along a second guide 158 in the opening direction 32 and closing direction 34. The second electric motor 154 is connected to the second driver 148 via a second, linearly acting, rotating drive means which is located behind the first drive means 156 in FIG. 3 and is therefore not visible. This allows the second driver 148 to be displaced by the second electric motor 154 along the second guide 158 in the opening direction 32 and closing direction 34. The two drivers 142 and 148 can thus be displaced independently of each other in the opening direction 32 and in the closing direction 34.

[0052] FIG. 4 shows a mechanically operated first lock for a shaft door leaf of a shaft door. The first lock 260 is arranged on a shaft door leaf (not shown in FIG. 4) and has a first latch 264 which can be pivoted about a first pivot axis 262 and which can engage in a first recess 266 in a frame 268 of the shaft door. In the position of the first latch 264 shown in FIG. 4, in which it engages in the first recess 266, the shaft door leaf cannot be displaced in the opening direction 32, whereby the shaft door leaf is locked.

[0053] The first latch 264 is connected to a lever 272 via a first, vertically aligned rod 270. The lever 272 is arranged to be pivotable about a second pivot axis 274 and has, at its end facing away from the first rod 270, a first coupling element 236 which is designed in the same way as the first coupling elements 36, 136 of FIGS. 1, 2, and 3. The first coupling element 236 is arranged above the second pivot axis 274, so that, when the first driver 242 is displaced in the opening direction 32, the lever 272 together with the first coupling element 236 is first tilted slightly downwards and only then displaced in the opening direction 32. The first coupling element 236 is thus initially displaced downwards in a first unlocking direction. This displacement leads to a displacement of the first rod 270 upwards and thus to a pivoting of the first latch 264 about the first pivot axis 262. The first latch 264 thus pivots out of the first recess 266, and the first lock 260 is unlocked. This allows the shaft door leaf to be displaced in the opening direction 32.

[0054] As soon as the first driver 242 no longer exerts any force on the first coupling element 236, the lever 272 seeks to rotate back into the position shown in FIG. 4 due to its weight distribution. This is possible when the shaft door leaf is closed again, and the first latch 264 can again engage in the first recess 266. The plunging is additionally supported by the weight distribution of the first latch 264.

[0055] FIG. 5 shows a mechanically operated second lock for a cabin door leaf of a cabin door. The second lock 360 is arranged on a cabin door leaf (not shown in FIG. 5) and has a second latch 364 which can be pivoted about a third pivot axis 362 and which can engage in a second recess 366 in a frame 368 of the cabin door. In the position of the second latch 364 shown in FIG. 5, in which it engages in the first recess 366, the cabin door leaf cannot be displaced in the opening direction 32, whereby the cabin door leaf is locked.

[0056] In order to enable operation of the second lock 360, the first driver 342 is designed in two parts. An elongated contact element 376 is connected to a base element 380 via two pivot levers 378. Due to its own weight, the contact element 376 assumes a position at a maximum distance from the base element 380 without any force being applied. The base element 380 can be displaced in the opening direction 32 and closing direction 34 by the drive unit (not shown in FIG. 5). As soon as the contact element 376 rests against the first or third coupling element 336, 341 due to a corresponding displacement of the base element 380 in the opening direction 32, it is pivoted in the direction of the base element 380, guided by the aforementioned pivot levers 378. In the process, said contact element is displaced, among other things, vertically upwards and perpendicular to the opening direction 32, and thus in a second unlocking direction. This displacement in the second unlocking direction is transmitted to the second latch 364 via a second rod 370. This leads to a pivoting of the second latch 364 about the third pivot axis 362. The second latch 364 thus pivots out of the second recess 366, and the second lock 360 is unlocked. This allows the cabin door leaf to be displaced in the opening direction 32.

[0057] As soon as the contact element 376 is no longer pressed against the first or third coupling element 336, 341 via the base element 380, the contact element 376 seeks to return to the position shown in FIG. 5 due to its weight. This is possible when the cabin door leaf is closed again, and the second latch 364 can again engage in the second recess 366. The plunging is additionally supported by the weight distribution of the second latch 364.

[0058] Finally, it should be noted that terms such as having, comprising, etc., do not preclude other elements or steps, and terms such as a or an do not preclude a plurality. Furthermore, it should be noted that features or steps which have been described with reference to one of the above exemplary embodiments may also be used in the context of the claims in combination with other features or steps of other exemplary embodiments described above. Reference signs in the claims should not be considered to be limiting.