EP3901082B1 - Car door arrangement for an elevator with a mechanical car door lock - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a car door arrangement for an elevator with a mechanical car door lock and an elevator comprising a movable car with such a car door arrangement.

According to the EN 81-20: 2014 standard, a device must be present in a lift that restricts the opening of the car door from the inside outside of a defined unlocking zone in the area of the landing doors.

Furthermore, it must be ensured that the opening of the car door from inside the car is only possible when the car is in the unlocking zone, on the other hand, in a case where the car stops in the unlocking zone for any reason, it it must be possible to open the car and landing door manually from inside the car with a force not greater than 300 N.

While various means have been proposed by which to comply with the above standard, they all require complex construction with many moving parts and are therefore relatively expensive to manufacture and maintain. KR 101 727 187 B1 discloses a car door arrangement according to the preamble of independent device claim 1.

It is therefore the object of the present invention to provide a car door arrangement for an elevator with the properties required above, which is characterized by a simple construction, a cost-effective production and a safe and durable operation.

For this purpose, the car door arrangement according to the invention comprises a joint part assigned to the car door and mounted pivotably, which is set up to carry at least one entrainment blade, wherein the at least one entrainment blade is set up to be connected in the area of an unlocking zone of the elevator with at least one counter-element assigned to a shaft door joint opening and closing of the car door and the landing door, wherein at least one stop element is also assigned to the joint part, a restoring element which interacts directly or indirectly with the pivotable joint part in such a way that it is preloaded in a direction opposite to a first end position, a drive device which is set up to interact with the joint part when it is actuated in the unlocking zone in such a way that, for a joint opening of the car door and the shaft door, the joint part is first pivoted in direction of the action of the restoring element up to an engagement position of the at least one driver blade with the at least one counter-element and then a linear movement of the joint part is caused, and that for a joint closing of the car door and the landing door first a linear movement of the joint part and then a pivoting of the joint part in the opposite direction the direction of the effect of the restoring element is caused. In this case, according to the invention, the joint part is also mounted in such a way that, in the event of a failure of the drive device outside the unlocking zone, it sweeps over the engagement position due to the action of the restoring element and reaches a second end position, with the car door arrangement according to the invention also comprising a first and a second catch element, which each are arranged and set up in such a way that in the first end position of the joint part, a linear movement of the Joint part is limited to a first opening path in the opening direction of the cabin door and in the second end position of the joint part a linear movement of the joint part in the opening direction of the cabin door is limited to a second opening path by interaction of the or one of the stop elements with the second catch element.

Thus, during normal operation in a closed state of the car door, the joint part is held in the first end position by the drive device against the action of the restoring element. In this case, the energization and thus the force exerted by the drive device can be adjusted in such a way that the force required to open the door by hand is between 50 N and 300 N and the above-cited standard is therefore met.

On the other hand, in a state in which the drive device fails and the restoring element is no longer counteracted by force, the articulated part is transferred to the second end position by the action of the restoring element within fractions of a second, so that manual opening of the door is prevented by the interaction of the second catch element with the or one of the stop elements is only possible by the second opening path.

Thus, in the present arrangement, essentially three cases or operating states of the articulated part can be distinguished. In the first case, the car door is in an unlocking zone due to a corresponding movement of the elevator. When the cabin door is opened as instructed, when the articulated part is pivoted by the drive device during the opening process, the at least one driver tongue assigned to the articulated part comes into contact with a corresponding counter-element, which limits the pivoting path of the articulated part in such a way that the opening and closing of the Cabin door together with the shaft door is possible.

In the second case, the drive device is energized according to a closing direction of the car door and manual opening of the car door is only possible by the first opening path due to the interaction of the first catch element with the stop element or one of the stop elements. This second operating state is assumed, for example, during a movement of the elevator between the unlocking zones.

In the third case, the car door is outside an unlocking zone and the drive mechanism fails, i. H. the corresponding motor is completely de-energized. In this operating state, due to the absence of a shaft door and thus of counter-elements for stopping the movement of the at least one driver blade and thus of the joint part, this joint part can be pivoted beyond the position described in connection with the first case by the action of the return element, so that it reaches the second end position achieved in which the second catch element comes into contact with the or one of the stop elements and manual opening of the door is only possible by the second opening path. In some variants of the present invention, a device can also be included which enables an emergency unlocking of the cabin door in this state.

The present invention thus ensures that the car door can only be opened within an unlocking zone by more than the first or second opening path. On the other hand, in a case in which the drive device fails within the unlocking zone, the joint part reaches the position as described in connection with the first case through the interaction of the driver tongue and counter-element, with this movement being driven by the reset element, so that in this case a Opening the car door together with the shaft door is also possible manually with a predetermined force. Thus, all of the requirements of the relevant standard described above can be met with a relatively simple and reliable construction.

In a particularly simple embodiment, only a single stop element can be provided, which can accordingly engage with the first or the second catch element in the different states in order to achieve the corresponding blocking of the car door or limitation of the opening path.

In any case, in a further embodiment, the or one of the stop elements can be removed from the plane of the

Joint part protrude, in particular in a manner designed as a cylindrical projection from the joint part. Alternatively, however, any differently designed stop elements could also be provided, although the design of the individual stop element as a cylindrical projection from the joint part allows positioning of the first and second catch element just next to the plane of the joint part and thus good force transmission between the corresponding catch element, the stop element and allows the joint part.

According to the invention, the restoring element of the arrangement according to the invention can be formed by a spring, in particular a spiral compression spring, or by means of a counterweight, which can act, for example, on the or one of the driver tongues or the joint part or another joint part, which is also connected to the at least one driver tongue is. The parallelogram arrangements known from the prior art can be thought of here, in which at least one upper and one lower joint part and at least one driver blade are connected to one another in such a way that the at least one driver blade changes its spatial alignment when the two joint parts rotate essentially retained and is only shifted in this orientation on an arcuate trajectory. Thus, in this configuration, the additional joint part offers a excellent starting point for the return element, without the arrangement described above in connection with the other joint part would be affected.

Although the first and the second opening path can be chosen to be as small as desired in order to essentially completely prevent the cabin door from being displaced in a state that is not intended for this purpose, it may also be desirable to allow a certain opening path in each case, in which case in a further embodiment however, the first and the second opening path should each be less than 50 mm, in particular between 15 and 25 mm and/or can be essentially the same.

For correct control of the entire operation of the elevator equipped with the car door arrangement according to the invention, it may be necessary to determine the current state of the car door for activation of various functions by a central elevator control system, in which case movement of the car should only be possible in particular when the cabin door is closed. For this purpose, the cabin door arrangement according to the invention can further comprise, in a further embodiment, a two-part door contact arrangement which is set up to emit an electrical signal which indicates that the cabin door is currently closed when the two parts of it are in contact with one another, with one of the both parts is arranged linearly movable together with the joint part. Although such door contact arrangements are already known from the prior art, the design of the joint part according to the invention offers the possibility of assigning the corresponding part directly to it and thus saving installation space.

Furthermore, in a further embodiment, the car door arrangement according to the invention can comprise a latch element which is set up and arranged to hold the hinge part in the engaged position during the linear movement thereof with respect to rotation to fix. In this way it can be ensured that the joint part remains in its intended rotational position when the car door is opened and closed, together with the shaft door. It turns out that the present invention with any variants of

Driver arrangements can be used, so that in a further embodiment, both a clamping driver arrangement and a spreading driver arrangement can be formed by the at least one driver blade and the at least one counter-element.

Furthermore, in a further embodiment, the present invention relates to an elevator comprising a movable car with a car door arrangement according to the invention as described above and a plurality of shaft doors. Here, too, any embodiment of the car door and shaft door can be used with regard to their movement pattern, for example, in a further embodiment, it can be an elevator door that opens on one side or an elevator door that opens in the middle with two separate door sections.

Fig. 1

eine schematische Frontalansicht eines Teils einer erfindungsgemäßen Kabinentüranordnung in einem ersten Zustand;

Fig. 2a und 2b

isometrische Ansichten eines anderen Abschnitts der Anordnung in dem Zustand aus Figur 1 sowie einer abgewandelten Variante davon;

Fig. 3a und 3b

die Anordnung aus Figur 1 in einem zweiten Zustand;

Fig. 4

einen ersten Teil der Anordnung aus Figur 1 in einem dritten Zustand;

Fig. 5

einen anderen Teil der Anordnung in dem Zustand aus Figur 4;

Fig. 6

eine isometrische Ansicht eines weiteren Teils der Anordnung in dem Zustand aus Figur 4; und

Fig. 7

eine isometrische Detailansicht der Rückseite der Anordnung in der Darstellung aus Figur 4.

Further features and advantages of the present invention will become apparent from the following description of an embodiment thereof, taken in conjunction with the accompanying figures. These show in detail:

1

a schematic front view of part of a cabin door arrangement according to the invention in a first state;

Figures 2a and 2b

isometric views of another portion of the assembly in the state from FIG figure 1 and a modified version thereof;

Figures 3a and 3b

the arrangement figure 1 in a second state;

4

a first part of the arrangement figure 1 in a third Condition;

figure 5

another part of the arrangement in the state figure 4 ;

6

an isometric view of another part of the arrangement in the state of figure 4 ; and

7

an isometric detail view of the rear of the assembly in the illustration figure 4 .

the Figures 1 and 2a first show respective sections of a car door arrangement according to the invention, which is generally denoted by the reference numeral 10 . Here is in the Figures 1 and 2a the arrangement 10 in a first state in which the car door can be opened together with a landing door, as indicated by the arrows P1. For this purpose, a drive device (not shown) exerts a force, for example via a toothed belt or a chain hoist, on a joint part 12 that is pivotably mounted on a driver base plate 11, causing this to pivot in the in figure 1 pivoted to the substantially horizontal orientation shown.

As well as in particular the Figure 2a can be seen, in this vertical state of the essentially planar joint part 12, two are attached to the joint part 12, but in figure 1 For reasons of clarity, driver blades 14a and 14b, not shown, with corresponding roller-shaped contact sections 14c come into contact with respective counter-elements 16a and 16b, in that the two driver blades 14a and 14b have been clamped by the pivoting movement of the joint part 12.

In this case, the two counter-elements 16a and 16b are associated with a shaft door of the elevator and, on the one hand, enable a common one Movement, ie a joint opening and closing of car door and shaft door, and on the other hand they limit the pivoting movement of the joint part 12 to the in figure 1 horizontal orientation shown. A modified version of the configuration Figure 2a is in Figure 2b shown. This is an expanding driver, with each of the two driver swords 14a' and 14b' being assigned an angled contact section 14c', with the counter-elements 16a' and 16b' assigned to the shaft door being designed in the form of rollers in this case.

Accordingly, it is to be understood that reference is made only to the variant from FIG Figure 2a only in cases in which the car door equipped with the arrangement 10 is in an unlocking zone of the elevator, ie it faces a landing door with the corresponding counter-elements 16a and 16b in a correct position, which is shown in FIGS Figures 1 and 2a shown alignment of joint part 12 and driver swords 14a, 14b is maintained in a stable manner. For this purpose, a ratchet element 18 is also provided, which acts on the joint part 12 on one side and also in the in figure 1 fixed pivot position shown. The movement of the joint part 12 in the direction of the arrows P1 is also made possible by the fact that an in figure 1 stop element 20, which is only indicated, is in a suitable position in order to be able to pass between a first catch element 22 and a second catch element 24 in the direction of arrows P1.

The effect in particular of the first catch element 22 is in the Figures 3a and 3b shown, in which there is a second state in which the joint part 12 is in a first end position. This final position from the Figures 3a and 3b is achieved in that the already mentioned drive device has driven the joint part 12 to rotate clockwise, in which position then the two in the Figures 3a and 3b not shown entrainment swords 14a and 14b so far have been brought together so that they come out of engagement with the counter-elements 16a and 16b and thus a movement of the elevator car is possible. Accordingly, the Figures 3a and 3b represents a closed configuration of the cabin door, which is provided, for example, while the cabin is being driven, and in which manual opening of the cabin door must be prevented for safety reasons.

Furthermore, also in the Figures 3a and 3b to recognize that the pawl element 18 has been pivoted out of engagement with the joint part 12, which is due to the fact that during a complete closing movement of the car door, the joint element 12 comes to rest against a corresponding counter-element, which causes a pivoting movement of the pawl element 18 against the action a spiral spring, not shown in the figures, which triggers the pawl element 18 in the direction of the in figure 1 shown position preloaded.

In order to ensure the effectiveness of the safety measure to limit the first maximum opening stroke W1, which is in Figure 3a is indicated by a corresponding double arrow and can be less than or equal to 23 mm, for example, the stop element 20 is placed in the horizontal extension of the first catch element 22 already mentioned. If an occupant of the elevator car tries to open the car door by manual force, the joint part 12 follows as in Figure 3b indicated by the arrow P2 and the stop element 20 lies within a corresponding counter-recess of the first catch element 22. This contact prevents further movement of the joint part 12 and thus the cabin door in the direction of the arrow P2 and the maximum manually triggerable opening of the cabin door is limited to the first opening path W1.

On the other hand, in the Figures 4 and 5 Two portions of the assembly 10 are shown in a third condition which occurs in cases where the power means fails for whatever reason, ie no power more of it is applied to the joint part 12 for clockwise rotation. This is in figure 5 shown restoring element 26 is provided, which will be described in detail below and the joint part 12 indirectly in the pivoting direction of the in the Figures 3a and 3b position shown in the in figure 1 shown position biased.

Accordingly, in cases where the cabin is in the area of an unlocking zone in the event of such a failure of the drive device, the state from the Figures 1 and 2a occur through the contact of the entrainment swords 14a and 14b with the counter-elements 16a and 16b and a relatively simple manual joint opening of the car door and shaft door would be possible.

However, if the car door is not located in such an unlocking zone, care must be taken to prevent the car door from being opened manually. For this purpose, the arrangement 10 is equipped with the already mentioned restoring element 26 in the form of a spiral compression spring, which acts on a further pivoted joint part 28 which, together with the already mentioned joint part 12 and the two driver blades 14a and 14b, forms a parallelogram arrangement forms. On the one hand, this parallelogram arrangement enables the two driver blades 14a and 14b to be moved with essentially the same spatial orientation on respective arcuate paths, but on the other hand it also allows the force to be transmitted by the return element 26 in a direction that corresponds to a counterclockwise pivoting of the joint part 12 . Here, the force of the restoring element 26 is indicated by the arrow F in figure 5 implied.

Since now as mentioned in the state from the Figures 4 and 5 If there are no opposing elements 16a and 16b opposite the two driver swords 14a and 14b, the pivoting movement of the joint part 12 is not carried out in the in figure 1 shown first position, but will end this run through until the joint part 12 is in the in figure 4 illustrated second end position with the stop element 20 in the second catch element 24 comes to a stop.

In this context, particular reference should also be made to the figure 6 referenced, which in isometric view from oblique front left according to the view of figure 4 shows the area of the joint part 12 to which the stop element 20 is assigned, which in the position shown rests in the manner mentioned in the second catch element 24, which is formed by a depression in a plate-shaped element. In this view figure 6 Furthermore, the stop element 20 itself can be seen for the first time and is shown as a cylindrical projection from the joint part 12 out of its plane.

As indicated by the crossed-out arrow P3 in figure 4 is indicated, the second catch element 24 serves not only as a limitation of the pivoting movement of the joint part 12 counterclockwise in the manner described above, but also as a means for limiting the second maximum opening path W2 in the FIG figure 4 shown state, for example also to a value of about 18 to 23 mm. Because the second catch element 24 is designed in the form of a pocket, a manual opening movement of the cabin door and thus of the joint part 12 and the stop element 20 can only be carried out in the region of this pocket.

Last be up figure 7 , which shows a two-piece door contact assembly 30 adapted to emit an electrical signal indicating that the car door is momentarily closed when the two pieces 30a and 30b thereof are in contact. This signal can in turn be forwarded to a controller of the elevator, so that in particular the elevator can only be driven by the controller in a state in which the door contact arrangement 30 indicates the closed state of the car door is reported. In the embodiment shown, the second part 30b of the door contact arrangement 30 is assigned to the driver base plate 11 and can therefore be moved linearly together with the joint part 12 during an opening and closing movement of the car door. In variants of the embodiment shown, however, the second part 30b of the door contact arrangement 30 could also be associated with a toothed wheel connection or a rocker. In any case, a space-saving installation of the door contact arrangement 30 in the present embodiment of a cabin door arrangement 10 can be achieved.

At this point, it only remains to be added that the present invention can be used not only with the configuration shown in the embodiment, but with both single and double drivers, which in turn can be designed as spreaders or clamps, with the Assignment of both swords and rollers to the drivers is free, so that there are a total of eight variants in this regard.

Claims (10)

1. Cabin door assembly (10) for a lift, having a mechanical cabin door lock, comprising:

   - a pivotably mounted articulated part (12) which is assigned to the cabin door and which is designed to support at least one driver blade (14a, 14b), the at least one driver blade (14a, 14b) in turn being designed to engage, in the region of an unlocking zone of the lift, with at least one counter-element (16a, 16b) which is assigned to a shaft door, for joint opening and closing of the cabin door and the shaft door, at least one stop element (20) also being assigned to the articulated part (12);

   - a restoring element (26) which interacts directly or indirectly with the pivotable articulated part (12) in such a way that said articulated part is preloaded in a direction counter to a first end position;

   - a drive device which is designed, when actuated in the unlocking zone, to interact with the articulated part (12) in such a way that, for joint opening of the cabin door and the shaft door, the articulated part (12) is first pivoted in the direction of the action of the restoring element (26) as far as an engagement position of the at least one driver blade (14a, 14b) with the at least one counter-element (16a, 16b), and then the articulated part (12) is moved linearly, and, for joint closing of the cabin door and the shaft door, the articulated part (12) is first moved linearly and then the articulated part (12) is pivoted counter to the direction of the action of the restoring element (26);
   characterised in that the articulated part (12) is also mounted in such a way that, in the event of a failure of the drive device outside the unlocking zone, it passes over the engaged position as a result of the action of the restoring element (26) and reaches a second end position;

   - a first and a second catch element (22, 24), each of which is arranged and designed in such a way that in the first end position of the articulated part (12), a linear movement of the articulated part (12) in the opening direction of the cabin door is limited to a first opening path (W1) by an interaction of the or one of the stop elements (20) with the first catch element (22), and in the second end position of the articulated part (12), a linear movement of the articulated part (12) in the opening direction of the cabin door is limited to a second opening path (W2) by an interaction of the or one of the stop elements (20) with the second catch element (24).
2. Cabin door assembly (10) according to claim 1,
   wherein a single stop element (20) is provided.
3. Cabin door assembly (10) according to either claim 1 or claim 2,
   wherein the or at least one of the stop elements (20) protrudes from the plane of the articulated part (12), in particular in the form of a cylindrical projection from the articulated part (12).
4. Cabin door assembly (10) according to any of the preceding claims,
   wherein the restoring element (26) is formed by a spring, in particular a spiral compression spring, or by means of a counterweight, which can act, for example, on the or one of the driver blades (14a, 14b) or the articulated part (12) or an additional articulated part (28) which is also connected to the at least one driver blade (14a, 14b).
5. Cabin door assembly (10) according to any of the preceding claims,
   wherein the first and the second opening path (W1, W2) are each less than 50 mm, in particular between 15 and 25 mm, and/or are substantially the same.
6. Cabin door assembly (10) according to any of the preceding claims,
   further comprising a two-piece door contact assembly (30) designed to emit an electrical signal which indicates that the cabin door is currently closed when the two pieces (30a, 30b) thereof are in contact with one another, wherein one of the two parts (30a, 30b) is arranged so as to be linearly movable together with the articulated part (12).
7. Cabin door assembly (10) according to any of the preceding claims,
   further comprising a latch element (18) which, in the engaged position, is designed and arranged so as to fix the articulated part (12) against rotation during linear movement thereof.
8. Cabin door assembly (10) according to any of the preceding claims,
   wherein a clamping driver assembly or a spreading driver assembly is formed by the at least one driver blade (14a, 14b) and the at least one counter-element (16a, 16b).
9. Lift comprising a movable cabin comprising a cabin door assembly (10) according to any of the preceding claims and a plurality of shaft doors.
10. Lift according to claim 9,
    wherein the cabin door assembly (10) and the shaft doors form a side-opening lift door or a centre-opening lift door.

Images