EP3901082A1 - Car door arrangement for an elevator with a mechanical car door lock - Google Patents

Abstract

The present invention relates to a car door arrangement (10) for an elevator with a mechanical car door lock, comprising a pivot part (12) associated with the car door, which is arranged to carry at least one driving bar, the at least one driving bar in turn being set up for this purpose is to come into engagement with at least one counter element assigned to a shaft door for joint opening and closing of the car door and the shaft door in an engagement position, wherein at least one stop element (20) is also assigned to the hinge part (12); a restoring element which interacts directly or indirectly with the pivotable joint part (12), a drive device which is designed to interact with the joint part (12) when it is actuated in the unlocking zone, the joint part (12) also being mounted in this way that, in the event of a failure of the drive device outside the unlocking zone, the action of the return element sweeps over the engagement position and arrives at a second end position, a first and a second catch element (22, 24), which are each arranged and set up in such a way that in the In the first end position of the joint part (12) a linear movement of the joint part (12) in the opening direction of the car door is limited to a first opening path (W1) and in the second end position of the joint part (12) a linear movement of the joint part (12) in the opening direction of the car door is limited to one second opening path (W2) is limited.

Description

The present invention relates to a car door arrangement for an elevator with a mechanical car door lock as well as an elevator comprising a movable car with such a car door arrangement.

According to the EN 81-20: 2014 standard, an elevator must have a device that restricts the opening of the car door from the inside outside a defined unlocking zone in the area of the shaft doors.

Furthermore, it must be ensured that the car door can only be opened from inside the car when the car is in the unlocking zone; It must be possible to open the car and landing door by hand from inside the car with a force not greater than 300 N.

Although different means have been proposed by means of which the cited standard can be complied with, they all require a complex construction with many moving parts and are therefore relatively expensive to manufacture and maintain.

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 long-lasting operation.

For this purpose, the car door arrangement according to the invention comprises a pivotably mounted articulated part assigned to the car door, which is set up to carry at least one driving bar, wherein the at least one driving bar is set up 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 shaft door to come into engagement, with the joint part also being assigned at least one stop element, 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 cooperate with the joint part upon actuation thereof in the unlocking zone in such a way that, for a common opening of the car door and the shaft door, the joint part is initially pivoted in Direction of the action of the restoring element up to an engagement position of the at least one driver sword with the at least one counter-element and then a linear movement of the joint part is produced, and that for a common closing of the car door and the shaft 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 action of the restoring element is caused. Here, according to the invention, the hinge 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 through the action of the restoring element and arrives at a second end position, the car door arrangement according to the invention further comprising a first and a second catch element, each of which 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 in the opening direction of the car door to a first opening path and in the second end position of the hinge part by interaction of the or one of the stop elements with the second catch element, a linear movement of the hinge part in the opening direction of the car door is limited to a second opening path.

Thus, during normal operation in a closed state of the car door, the drive device holds the articulated part in the first end position against the action of the restoring element. The current supply and thus the force exerted by the drive device can be set in such a way that the force required to open the door by hand is between 50 N and 300 N, thus fulfilling the standard cited above.

In contrast, in a state in which the drive device fails and the restoring element is no longer counteracted by force, the joint 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 through the interaction of the second catch element the or one of the stop elements is only possible by the second opening path.

Thus, in the present arrangement, a distinction is essentially made between three cases or operating states of the joint part. In the first case, the car door is in an unlocking zone as a result of a corresponding movement of the elevator. When the car door is instructed to open, when the joint part is pivoted, driven by the drive device, in the course of the opening process, the at least one driver blade assigned to the joint part comes into contact with a corresponding counter-element that limits the pivoting path of the joint part in such a way that opening and closing of the Car door together with the landing 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, while the elevator is moving between the unlocking zones.

In the third case, the car door is outside an unlocking zone and the drive device 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 to stop the movement of the at least one driving bar and thus of the joint part, this joint part can pivot beyond the position described in connection with the first case by the action of the return element, so that it is 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 emergency unlocking of the car 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 by the interaction of the driving sword and the counter element, this movement being driven by the return element, so that in this case a It is also possible to open the car door together with the shaft door manually with a predeterminable force. Thus, all of the above-described requirements of the relevant standard 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 come into engagement with the first or second catch element in the different states in order to achieve the corresponding blocking of the car door or restriction of the opening path.

In any case, the or one of the stop elements can protrude from the plane of the joint part, 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, but the design of the individual stop element as a cylindrical projection from the joint part means that the first and second catch element are positioned just next to the plane of the joint part and thus good force transmission between the corresponding catch element, the stop element and the joint part allows.

The restoring element of the arrangement according to the invention can be formed according to the invention 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 driving swords or the joint part or another joint part which is also connected to the at least one driving sword is. The parallelogram arrangements known from the prior art can be thought of, in which at least one upper and one lower joint part and at least one driving bar are connected to one another in such a way that the at least one driving bar is spatially aligned when the two joint parts are rotated is essentially retained and is only shifted in this orientation on an arcuate trajectory. Thus, in this configuration, the further joint part offers one excellent starting point for the resetting element without the above-described arrangement in connection with the other joint part being affected by this.

Although the first and second opening paths can be selected to be essentially as small as desired in order to essentially completely prevent the car 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, the first and the However, 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 for a control of various functions by a central elevator control to determine the current state of the car door, in which case, in particular, movement of the car should only be possible when the car door is closed. For this purpose, the car door arrangement according to the invention can further comprise a two-part door contact arrangement which is set up to output an electrical signal which indicates that the car door is momentarily closed when the two parts thereof are in contact with one another, one of the two parts together with the joint part is arranged to be linearly movable. Although door contact arrangements of this type 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, the car door arrangement can comprise a latch element which is set up and arranged to rotate the joint part in the engagement position during the linear movement thereof 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 can be used with any variants of driver arrangements, so that both a clamping driver arrangement and an expanding driver arrangement can be formed by the at least one driver sword and the at least one counter element.

Furthermore, the present invention relates to an elevator comprising a movable cabin with a cabin door arrangement according to the invention as described above and a plurality of shaft doors. Here, too, any embodiments of the car door and shaft door can be used with regard to their movement pattern, for example 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, when considered together with the accompanying figures. These show in detail:

Fig. 1

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

Figures 2a and 2b

isometric views of another section of the assembly in the state from Figure 1 as well as a modified variant thereof;

Figures 3a and 3b

the arrangement Figure 1 in a second state;

Fig. 4

a first part of the arrangement Figure 1 in a third State;

Fig. 5

another part of the arrangement in the state Figure 4 ;

Fig. 6

an isometric view of another part of the assembly in the condition of FIG Figure 4 ; and

Fig. 7

an isometric detailed view of the rear of the arrangement in the illustration Figure 4 .

the Figures 1 and 2a initially show respective sections of a car door arrangement according to the invention, which is designated quite generally with 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 shaft door, as indicated by the arrows P1. For this purpose, a force is exerted on a joint part 12 pivotably mounted on a driver base plate 11 by a drive device (not shown), for example via a toothed belt or a chain hoist, which in a pivoting movement into the in Figure 1 has pivoted substantially horizontal alignment shown.

As also in particular the Figure 2a As can be seen, in this vertical state of the essentially flat joint part 12, two are attached to the joint part 12, but in FIG Figure 1 For the sake of clarity, driving swords 14a and 14b with corresponding roller-shaped contact sections 14c come into contact with respective counter elements 16a and 16b in that the two driving swords 14a and 14b have been clamped by the pivoting movement of the joint part 12.

Here, the two counter-elements 16a and 16b are assigned to a shaft door of the elevator and, on the one hand, enable a joint Movement, ie a common opening and closing of the car door and shaft door, and on the other hand, by their contact with the contact sections 14c of the swords 14a and 14b, they limit the pivoting movement of the joint part 12 to the in Figure 1 horizontal alignment shown. A modified variant of the configuration Figure 2a is in Figure 2b shown. This is a spreading driver, the two driver swords 14a 'and 14b' each being assigned an angled contact section 14c ', in which case the counter-elements 16a' and 16b 'assigned to the shaft door are designed in the shape of rollers.

It is accordingly understood that with reference only to the variant from Figure 2a only in cases in which the car door equipped with the arrangement 10 is located in an unlocking zone of the elevator, ie a shaft door with the corresponding counter elements 16a and 16b is opposite it at a correct position, which in the Figures 1 and 2a The shown alignment of the joint part 12 and driver swords 14a, 14b is stably maintained. For this purpose, a pawl element 18 is also provided, which acts on one side on the joint part 12 and also in the in Figure 1 the 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 only indicated stop element 20 is located in a suitable position 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 end position from the Figures 3a and 3b is achieved in that the already mentioned drive device has driven the joint part 12 to rotate in a clockwise direction, with the two in this position then being in the Figures 3a and 3b not shown driving swords 14a and 14b so far have been brought together 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 car door, which is provided, for example, while the car is in motion, and in which manual opening of the car door must be prevented for safety reasons.

Furthermore is 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 with 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 effect a coil spring, not shown in the figures, which triggers the pawl element 18 in the direction of the in Figure 1 position shown preloaded.

In order to ensure the effect of the safety measure for restricting the first maximum opening path W1, which is specified in Figure 3a is indicated by a corresponding double arrow and can be, for example, less than or equal to 23 mm, 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 applying a manual force, the joint part 12 follows as in FIG 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 system prevents further movement of the joint part 12 and thus the car door in the direction of the arrow P2 and prevents the car door from being opened manually as much as possible is limited to the first opening path W1.

On the other hand, in the Figures 4 and 5 two sections of the arrangement 10 are shown in a third state which occurs in cases in which the drive device fails for whatever reason, ie no force more of it is exerted on the hinge part 12 for clockwise rotation. To do this, this is in Figure 5 Reset element 26 shown is provided, which will be described in detail below and the hinge part 12 indirectly in the pivoting direction of the in the Figures 3a and 3b position shown in Figure 1 position shown preloaded.

Accordingly, in cases in which the car is in the area of an unlocking zone in the event of such a failure of the drive device, the state would change from the Figures 1 and 2a enter through the contact of the driving 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 manual opening of the car door. For this purpose, the arrangement 10 is equipped with the aforementioned return element 26 in the form of a spiral compression spring, which acts on a further pivotably mounted joint part 28 which, together with the already mentioned joint part 12 and the two driving swords 14a and 14b, form a parallelogram arrangement forms. This parallelogram arrangement on the one hand enables the two driving swords 14a and 14b to be moved with essentially the same spatial orientation on respective arcuate paths, but on the other hand also allows the force to be transmitted by the restoring element 26 in a direction that corresponds to pivoting the joint part 12 in the counterclockwise direction . Here, the force action of the restoring element 26 is indicated by the arrow F in Figure 5 indicated.

Since now, as mentioned, in the state from the Figures 4 and 5 the two driving swords 14a and 14b are not opposed by any counter-elements 16a and 16b, the pivoting movement of the joint part 12 is not in the position shown in FIG Figure 1 shown in the first position, but will be this one run through until the joint part 12 is in the in Figure 4 second end position shown comes to the stop element 20 in the second catch element 24 to the stop.

Particular attention should also be paid to the Figure 6 referenced, which in an isometric view from obliquely front left according to the view of Figure 4 shows the region 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 recess in a plate-shaped element. In this view from Figure 6 the stop element 20 itself can also 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 arrow P3 in Figure 4 is indicated, the second catch element 24 serves not only to limit 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 in Figure 4 shown state, for example also to a value of about 18 to 23 mm. Since the second catch element 24 is designed in the shape of a pocket, a manual opening movement of the car door and thus of the joint part 12 and the stop element 20 can only be carried out in the area of this pocket.

Finally be up Figure 7 which shows a two-part door contact arrangement 30 which is set up to output an electrical signal which indicates that the car door is momentarily closed when the two parts 30a and 30b thereof are in contact with one another. This signal can in turn be passed on to a control of the elevator, so that, in particular, driving of the elevator can only be enabled by the control in a state in which the door contact arrangement 30 is in 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 consequently can 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, the second part 30b of the door contact arrangement 30 could, however, also be assigned to a gear wheel connection or a rocker. In any case, a space-saving installation of the door contact arrangement 30 in the present embodiment of a car door arrangement 10 can be achieved.

It only remains to be added at this point 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 Assignment of both swords and roles to the drivers is free, so that in this respect there are a total of eight variants.

Claims (10)

Car door assembly (10) for an elevator with a mechanical car door lock, comprising: - A joint part (12) assigned to the car door and mounted so as to be pivotable, which is set up to carry at least one driving bar (14a, 14b), the at least one driving bar (14a, 14b) in turn being set up in the area of an unlocking zone of the elevator to come into engagement with at least one counter element (16a, 16b) assigned to a shaft door for joint opening and closing of the car door and the shaft door, at least one stop element (20) also being assigned to the hinge part (12); - A restoring element (26) which interacts directly or indirectly with the pivotable joint part (12) 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 cooperate with the joint part (12) when it is actuated in the unlocking zone in such a way that, for a common opening of the car door and the shaft door, the joint part (12) is initially pivoted in the direction of the action of the restoring element ( 26) up to an engagement position of the at least one driver sword (14a, 14b) with the at least one counter element (16a, 16b) and then a linear movement of the joint part (12) is brought about and that for a common closing of the car door and the shaft door initially a linear movement the joint part (12) and then a pivoting of the joint part (12) is caused against the direction of the action of the restoring element (26); wherein the joint part (12) is also mounted in such a way that in the event of a failure of the drive device outside the unlocking zone, the action of the restoring element (26) sweeps over the engagement position and arrives at a second end position; - A first and a second catch element (22, 24), which are each arranged and set up in such a way that in the first end position of the joint part (12) a Linear movement of the joint part (12) in the opening direction of the car door is limited to a first opening path (W1) and in the second end position of the joint part (12) a linear movement of the The hinge part (12) is limited to a second opening path (W2) in the opening direction of the car door. Car door assembly (10) according to claim 1,
a single stop element (20) being provided. Car door arrangement (10) according to claim 1 or 2,
wherein the or at least one of the stop elements (20) protrudes from the plane of the joint part (12), in particular in a manner designed as a cylindrical projection from the joint part (12). Car door arrangement (10) according to one 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, for example, acts on the or one of the driving swords (14a, 14b) or the joint part (12) or a Another joint part (28) can act, which is also connected to the at least one driver sword (14a, 14b). Car door arrangement (10) according to one 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 essentially the same. Car door arrangement (10) according to one of the preceding claims,
further comprising a two-part door contact arrangement (30) which is set up to output an electrical signal which indicates that the car door is momentarily closed when the two parts (30a, 30b) thereof are in contact with one another, one of the two Parts (30a, 30b) is arranged to be linearly movable together with the joint part (12). Car door arrangement (10) according to one of the preceding claims,
further comprising a pawl element (18) which is set up and arranged to fix the joint part (12) in the engagement position during the linear movement thereof with respect to rotation. Car door arrangement (10) according to one of the preceding claims,
wherein the at least one driver sword (14a, 14b) and the at least one counter element (16a, 16b) form a clamping driver arrangement or an expanding driver arrangement. Elevator, comprising a movable car with a car door arrangement (10) according to one of the preceding claims and a plurality of shaft doors. Elevator according to claim 9,
wherein the car door arrangement (10) and the shaft doors form an elevator door that opens on one side or an elevator door that opens in the middle.

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