EP1772414A1 - Foldable self-locking toe guard for elevator car - Google Patents

Abstract

Safety system comprises devices (12, 13b, 13c) for locking folding skirt elements (10, 11) in a protecting position so that they pivot by forces on the skirt elements acting toward the shaft and in the horizontal direction. Preferred Features: One locking device for steering the folding movement of the skirt elements is structured so that is acts simultaneously as a guiding and locking device in the protecting position whilst it locks the skirt elements in the protecting position against a common pivoting movement in the direction of the shaft.

Description

The invention relates to a safety system for a lift with a car apron according to the preamble of claim 1.

It has long been the state of the art to install under the car door opening of elevators aprons extending downwards from the car door sill in the vertical direction.

Such safety systems with a car apron provide protection in case passengers have to be released from a car stuck in the area of a floor opening, at a distance from the inherent stopping position. In such a case, a more or less large gap between the lower edge of the car floor and the top of the floor ceiling opens up. The people to be evacuated will usually sit on the car floor and then let their legs out of the car until they come to a stop on the floor. There is now the danger that these people come in reserve and crash through the gap between the bottom of the car and the top of the floor ceiling in the shaft.

This danger eliminates a safety system of the type in question by closing the gap between the car floor and the floor ceiling with its car apron.

To be sure, the car apron of such a safety system must have a considerable length in the vertical direction. The relevant standards usually require a length of not less than 750 mm.

In many cases rigid car skirts are used in the prior art. However, this then means that sufficient space must also be available in the shaft base, so that the car apron does not hit the shaft floor even when the car approaches the lowest stop.

There are numerous cases (especially in old building renovations, in the context of which it can cope with found manholes), in which at the bottom of the shaft bottom there is not enough space to allow a rigid car apron. In the prior art, therefore, a whole series of hinged or retractable or even retractable car aprons have become known - so car aprons, which can be optionally placed in a so-called protective position in which they protrude from the car toward the shaft base and, as described, protection against Accidents by trapping or crashing into the shaft provide, or in a rest position in which they are drafted or pulled aside so far that no placement on the shaft base is to be feared.

For example, the DE 203 13 911 designed in the manner of a scissor lattice, telescoping in the vertical direction grid as a car apron. Such a grid is not only expensive, but also problematic from a stability point of view, since numerous pivot points are to be realized. Because the grid, which can not be supported backwards (seen from the shaft door opening) in the shaft-facing direction, must be very rigid in itself. Sufficiently rigid, so as not to give way, even if at its lowest end there is a large, approximately horizontally - inward direction To attack forces, as they occur in the worst case, when a person falls in the bay towards the bottom of the grid. In order to ensure adequate stability, therefore, relatively heavy and stable structures are required, which not only unnecessarily limit the payload of the car, but also expensive to wear and only with considerable effort to use, in particular to catch up again.

The US Pat. No. 6,095,288 In contrast, proposes a rigid car apron, which is hinged hinged in the area of the car floor. The lowest end of this car apron, when the cab approaches the bottom stop and there is only a small distance to the pit floor, runs on an inclined plane at the bottom of the pit. It is thus folded against the resistance of a damper or spring element inwardly in the direction schachteinwärtiger as a whole under the car floor.

This construction has two disadvantages. Firstly, the apron is not blocked in its protective position. That is, it can not be ruled out that the skirt is pushed aside by the action of stronger forces acting approximately horizontally in the shaft-wise direction. For example, in situations where a passenger tries to descend from a car stuck high above the floor ceiling onto the floor, thereby losing his balance and falling backwards against the apron in the direction of the shaft.

On the other hand is disadvantageous in this construction that the skirt in its folded state "blocks" a relatively large area under the car. This insofar as in this area no other functional elements can be mounted under the car floor, such as pulleys or stops, which cooperate with mounted on the shaft base buffers or, in the case of self-propelled cars, the car-proof drive. This plays a role in particular in elevators with a relatively small cabin, at which even under the cabin floor only relatively little area is available.

From the EP 1 118 576 is a foldable car apron known (Figure 3b). This car apron is formed so that it consists of two sheet-like elements which are hinged together at the extreme ends of their opposite horizontal edges by means of hinges. The first lowermost plate is provided with a lower transverse strut, which in turn is connected by means of longitudinal struts with a four-bar linkage. The second, the car floor near sheet metal is pivotally hinged to the car in an area below the car door sill. The construction is designed so that the two plates forming the actual car apron do not come to rest either completely or approximately in one plane or parallel to one another in adjacent planes, even in the protective position. Instead, the four-bar linkage used here ensures that the two plates forming the actual car apron can not "make long", but always have a certain angular position relative to each other and thus ensure that the plates can be folded together when the apron touches the shaft bottom.

This construction has several disadvantages. On the one hand leads to a penetration permitting opening of this construction to the dangers.

Above all, however, this construction is not completely harmless because it is not locked and in particular is not self-locking. That's crucial. Because it is again so that a person who has emerged from the car with the feet on the floor during the emergency exit and at this moment loses its balance and falls unhappy back against the car apron, the car apron can push aside a considerable amount aside ,
In addition, this construction, although the actual car apron plates forming folds claimed considerable space under the car floor. This is because the inboard tie bar between the four-bar link and the bottom plate of the car apron is approximately as long as the two panels of the car apron are in their unfolded position Position. Therefore, the construction requires significantly more space under the car floor, as required by the two folded plates per se.

The invention is based on the object to provide a safety system with a movable car apron, which offers improved protection in protection position and opens the possibility to have to keep free for the rest position only less area under the car.

This object is achieved according to the invention in that the safety system has means by means of which the foldable skirt elements can be locked in their protective position in such a way that they are not moved relative to one another by forces acting on one or more skirt elements from the outside and in the bay-like, substantially horizontal direction. can still be pivoted together in the bay direction. Smaller, z. B. certain elasticity relative movements to each other or in total shaft inward, are uncritical and therefore allow. Ideally, the locking means are self-locking, d. H. a force acting in the opening direction locks the locking means against opening, so that the force acting in the opening direction can be arbitrarily large without it being feared that the locking will yield (as long as no component destruction occurs).

In this way, a high security is achieved even with a car apron of foldable and thus space-saving apron elements.

An advantageous development provides that the folding movements of the apron elements guiding means are designed so attack on one of the skirt elements that they simultaneously act in the protective position as a locking means by the skirt elements in their protective position against each other and at the same time against a common pivoting in lock in the inward direction.

Such a design leads to a substantial simplification. It requires no additional locking means more.

An advantageous development provides that the axis around which the guide or locking means are pivotally mounted on one of the skirt elements, seen in the vertical direction, between the axis is about which the car next apron element pivotally hinged to the car, and the axis that connects the skirt elements relative to each other. Such an axial position allows in a particularly simple manner an effective, because preferably self-locking locking the skirt elements.

Preferably, the skirt elements are hinged to each other so that on a skirt element, the common pivot axis is disposed away from its nearest horizontal edge, so that the portion of this apron element which extends between the common pivot axis and the horizontal edge, forms a lever arm with respect to the common pivot axis on which the guiding or locking means engage. This lever arm allows a self-locking blockage of the two skirt elements.

Preferably, the guiding and / or locking means comprise at least one pull or push rod, which is foldable in itself. This reduces the space requirement under the car in rest position, since then occupy not only the apron, but also the draft or push rods used for the construction of little space. For the same reason, a further preferred embodiment provides that the guiding and / or locking means comprise at least one telescopic actuating member.

In the context of a further preferred embodiment, it is provided that the skirt elements extend in their protective position in a plane or substantially parallel to one another along two directly adjacent planes, so that they form a substantially flat overall surface. Such a design makes it possible to control the gap between the car apron and the upper edge of the respective one Floor ceiling to keep largely constant small. The risk of pinching is even lower than when using a skirt with a "kink", ie an apron, the skirt elements are arranged more than slightly angularly to each other.

A further preferred embodiment provides that the skirt elements are held in its rest position by another locking means under the car floor so that they automatically pivot in the protective position and lock there when the lock of said further locking means is deactivated. Such an embodiment ensures that even with sudden power outages, which have the consequence of a subsequent emergency exit of the passengers result, the apron elements are reliably placed in their protective position.

Preferably, a monitoring device is provided, by means of which it can be detected whether the apron elements properly assume their rest position after their use and release the ride only when that is the case, so putting on is prevented.

Fig. 1a:

Ein erstes Ausführungsbeispiel der Erfindung, montiert an einem in einem Schacht laufenden Treibscheibenaufzug, wobei die Schürzenelemente in Schutzposition ausgefahren sind;

Fig. 1b:

einen vergrößerten Ausschnitt des von Fig. 1a offenbarten Ausführungsbeispiels, und zwar im Bereich des gelenkigen Stoßes zwischen den beiden Schürzenelementen 10 und 11;

Fig. 1c bis 1f:

das erste Ausführungsbeispiel der Erfindung in verschiedenen Stadien des Auseinander- und Zusammenfaltens;

Fig. 1g und 1h:

eine perspektivische Ansicht dieses ersten Ausführungsbeispiels;

Fig. 1i:

einen vergrößerten Ausschnitt des von dem ersten Ausführungsbeispiel verwendeten Knickhebels;

Fig. 2a bis 2d:

ein zweites Ausführungsbeispiel in verschiedenen Positionen des Zusammen- und Auseinanderfaltens;

Fig. 3a bis 3d:

ein drittes Ausführungsbeispiel in verschiedenen Positionen des Zusammen- und Auseinanderfaltens;

Fig. 3e und 3f:

eine perspektivische Darstellung des dritten Ausführungsbeispiels schräg von unten gesehen, und

Fig. 4a bis 4c:

eine mit einer zusätzlichen Führungsrolle am Schürzenende versehene Variante des zweiten Ausführungsbeispiels.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments with reference to the drawing. Show:

Fig. 1a:

A first embodiment of the invention mounted on a traction sheave elevator running in a shaft, wherein the skirt elements are extended in the protective position;

Fig. 1b:

an enlarged section of the embodiment disclosed in Figure 1a, in the region of the articulated joint between the two skirt elements 10 and 11.

1c to 1f:

the first embodiment of the invention in various stages of unfolding and folding;

Fig. 1g and 1h:

a perspective view of this first embodiment;

Fig. 1i:

an enlarged section of the buckle lever used by the first embodiment;

2a to 2d:

a second embodiment in different positions of folding and unfolding;

3a to 3d:

a third embodiment in various positions of folding and unfolding;

3e and 3f:

a perspective view of the third embodiment viewed obliquely from below, and

4a to 4c:

a provided with an additional guide role at the skirt end variant of the second embodiment.

Fig. 1a shows a 2: 1 suspended in a traction drive pulley elevator with its main components, the elevator is shown as such only schematically and is used in the representation chosen here only as an example - the invention can equally be used in quite different types of elevators including hydraulic lifts.

The elevator consists of an elevator car 1, which runs along the guide rails, not shown, the shaft 2 along. In the shaft head a traction sheave drive 3 is provided between the area traveled by the cabin or its extensions upward and the shaft wall, which is here, purely by way of example, designed as a drive with so-called double wrap. From the drive, the support cable 4 runs on one side to the cabin, is by means of pulleys 5 passed under the cabin 1 and runs on the other side back up into the shaft head where the support cable is fixed (not shown here). On the other hand, the support cable 4 runs from the drive to the counterweight 6, which may possibly also be suspended in a bottle (not shown here).

The illustration selected from Fig. 1a shows the situation that the car has kept unscheduled in the shaft, for example due to a power failure or damage to the traction sheave drive. The car 1 is therefore only partially in front of the shaft door opening 6. The passengers are released from the car by the car doors are opened manually. The passengers sat in such a situation, at least if a greater height difference to the floor floor is overcome, i. d. R. on the threshold of the car door and can then slide down along the arrow P with his feet to the floor floor 7.

The inherent in the risk of falling into the shaft gap between the floor floor 7 and the car door sill 8 is closed by the security system. The safety system, which will be explained in more detail below, consists of a car apron 9 with two largely rigid apron elements 10 and 11 and the movement of these apron elements guiding elements in the form of a linkage comprising two articulated levers 12. The two skirt elements 10 and 11 are here in their so-called protective position, d. H. they depend vertically oriented, so largely vertically extending from the bottom of the car compartment down (with minor deviations from the vertical are harmless, a fully vertical orientation is desired).

The two skirt elements 10, 11 are locked in their protection position - the skirt elements can not be moved relative to each other or jointly in the shaft direction by forces acting from the shaft door opening in the baywise and substantially horizontal directions on one or both of the skirt elements 10, 11 be panned. Being remarkable is that there is a self-locking lock - the attack of said forces causes the skirt elements are held even more firmly in their protective position. In order to bring the skirt elements out of their protective position, the larger the said forces acting in the horizontal-bayward direction, the greater are the greater the forces required.

Why this is so, becomes clear with reference to FIG. 1b. FIG. 1b shows a detail of the safety system shown in FIG. 1a, namely the area in which the two skirt elements 10 and 11 are hinged to one another and the second skirt element 11 is articulated to the articulated lever 12.

Shown here is a first apron element 10, which is articulated by means of the hinge 13a in the region near the threshold of the elevator car pivotally mounted on the elevator car. The first skirt element 10 is largely rigid in itself. Preferably, this apron element is formed from a full-surface sheet, although admittedly allows certain twists, but does not yield significantly, so in itself is largely rigid. Alternatively, however, this apron element can also be formed, for example, by a circumferential, substantially rigid apron element frame, which is planked or tightly covered with a suitable material, for example a plastic plate, a Kevlar fabric or thick nylon fabric or a glass fiber fabric. No matter which of these options this skirt element makes use of, it is in any case particularly preferred that the skirt element has no larger openings which are accessible from the shaft door opening, when the skirt element is in the protective position. Any larger openings, ie openings that allow penetration of whole body parts, represent a source of potential injury. For the further skirt element 11, the same design options are open as for the first skirt element 10. Preferably, both skirt elements are of similar construction.

The skirt member 11 is hinged to the first skirt member via a hinge 13b. The hinge 13b is there (relative to the protective position) mounted in the vicinity of the lower horizontally oriented end edge of the first skirt member 10. At the same time, the hinge is attached to the further skirt element 11. This, however, at some distance from its (seen in protective position) horizontally aligned upper end edge. In the vicinity of the upper horizontally oriented end edge of the other apron element 11, the articulated lever 12 is articulated via a further hinge 13c, which not only functions as a guide means that controls the folding and unfolding, but also as in its length (between its articulation points under the car and the skirt element 11) variable locking means. As a result of the just described type of articulation of the articulated lever, the articulation point of the articulated lever 12, based on the axis of the hinge 13b, a lever arm H. The length of this lever arm H is to be dimensioned depending on the circumstances of the case.

To this self-inhibition is briefly stated:

For example, on the upper skirt member 10, if a substantially inwardly directed, substantially horizontal force F _{h1 is} in the bayward direction, this force will try to turn the upper skirt member 10 clockwise inward. The upper apron element 10, which is articulated on the hinge 13 b on the lower apron element 11, is prevented from such a movement, since it starts against the lower apron element 11 and thus indirectly against the articulated lever 12. It can not be shortened because it is locked. As a result, the two skirt elements are locked against each other, even to the extent that they can not be pivoted with each other shaft inwards.

A similar situation arises when on the lower skirt member 11 a substantially horizontally acting in the bayward direction force F _h2 occurs. This force attempts to rotate the lower guard 11 clockwise inward about the axis of the hinge 13c. At this movement, the lower skirt element 11 is prevented by the upper skirt element 10 connected to it via the hinge 13b. Because the upper skirt element 10 sets is against the hinge 13c (or an appropriate stop suitably mounted elsewhere stop) and is therefore prevented from rotation. This also prevents rotation of the lower apron element 11. The two apron elements thus in turn lock against each other. Together, they can not be pivoted in the bay direction, as they are prevented by the articulated lever 12 therefrom.

With reference to FIG. 1b, it can also be seen that the two skirt elements 10 and 11, when in protective position as in this case, essentially form a flat surface - in which the two skirt elements lie parallel to each other in two directly adjacent planes (apart from the deflector slope 14 at the lower end of the lower protective element 11), so that they form substantially a total area, at which even when the elevator is still moving, nothing can get caught, and the an approximately equal gap distance between the apron surface and the top of each floor floor 7 ensures.

It is of course also possible to attach the two skirt elements 10 and 11 to each other so that they lie completely or very largely in a single plane. This is not shown here.

Fig. 1c shows (schematically) the safety system just discussed in its rest position. Preferably, this rest position is always taken when scheduled operation expires.

The safety device comprises an electric holding magnet 16 mounted on an unspecified carrier. This acts (with respect to the protective position) on the lower portion 12b of the articulated lever 12 and holds it in an approximately horizontal, folded position. It is not necessary (and preferably even waived) that the security system is folded completely flat under the car floor. Rather, the security system can and should not be folded completely flat even when folded, but by a certain amount "Apply" in the vertical direction. Because then there is enough space to accommodate both the first skirt member 10 and the two parts 12a and 12b of the articulated lever 12 between the underside of the car floor and the second skirt member 11 and possibly even a stable support frame, ie to install a subframe, all Single components of the safety system contributes and therefore allows easy initial installation and especially retrofitting of the safety system - by only the support frame must be screwed in a few places under the car floor, which in turn keeps all components of the safety system in place.

The considerable advantage of the construction according to the invention results in a comparison of Fig. 1c with Fig. 1a. Due to its foldability, the entire safety system can be installed in an area below the car floor, the area of which occupies only about one third, in any case less than half the total area of the underside of the car. In this way, it is readily possible to the car underside z. B. also provide pulleys for the support cable without collisions with the safety system are to be feared and without these pulleys outside an imaginary, running through the center of gravity of the car line must be attached.

If now the power fails, so that the car "hangs", then breaks the magnetic holding force of the magnet 16 together. The two skirt elements 10 and 11 and the articulated lever 12 "fall" under their own weight down (Fig. 1d), possibly supported by a spring. With appropriate design of the individual components gain this while falling so much momentum that they fall into the end position shown by Fig. 1e (and of Fig. 1a) and lock there automatically or self-locking self-locking.

The articulated lever 12 is designed accordingly. FIG. 1i shows a section of the articulated lever 12 in the region of the articulation 12c between the upper articulated lever part 12a and the lower articulated lever part 12b. The lower articulated lever part 12b is in this case with a stop lug Equipped 12d, which limits the Verschwenkweg the two articulated levers 12a and 12b to each other. It is the case that the articulated lever can only continue to buckle from the position shown here in such a way that the articulation point 12c moves upwards in the direction of the arrow. From this position, it is not possible to bend the articulated lever so that the articulated axle 12c moves downwards, in the opposite direction of the arrow. At the same time, the articulated lever 12 is designed so that the longitudinal axis 12f of the articulated lever part 12b deviates by a few degrees from the longitudinal axis 12e of the upper articulated lever part 12a. In this way, the articulated lever is self-locking in the sense that even when high forces occur in the axial direction of the axle 12c can not be made to emigrate upward in the direction of the arrow.

This type of self-locking is clearly preferred, although it is also to be remembered not interpret the articulated lever so self-locking, as described, but to lock it by means of an active locking means, such as a locking pin. Wherein such locking means / such a locking pin is so best designed that it is automatically effective, for example by falling under its spring bias in a corresponding latching opening as soon as the articulated lever has reached the position in which it is to be blocked.

As the safety system is manually unlocked again when the elevator is to be put back into operation after a power failure and after salvaging the passengers, Fig. 1f. The safety device can be unlocked, for example, by a small, possibly closable hole (closable by plugs or the like) is provided in the upper skirt member 10 at a suitable location by the means of a hook rod or other suitable tool from the floor side in the direction of the arrow the buckling lever 12 can be pulled to cause it to buckling. Then both apron elements together with the associated guide means can be brought back into the rest position - manually or with a corresponding device.

Of course, an automatic unlocking is possible. For this purpose, a suitable actuator (pneumatic cylinder, motorized threaded rod, linear motor or the like) is provided which induces a corresponding bending movement of the articulated lever 12 from the inside, not shown here.

Figs. 1g and 1h again show the construction of the first embodiment just discussed in three-dimensional view.

Figs. 2a to 2d show a second embodiment of the invention. In this embodiment, as also shown here, the two skirt elements 10 and 11 can be hinged to each other in the same way as that shown in FIG. 1b for the previous embodiment. Changed here are only the guiding and locking means, which are designed in the form of a pivot lever 120, which consists of two sections, namely its upper portion 120 b and its lower portion 120 a. This pivot lever 120 is articulated with its lower portion 120a in the same way as before, hinged to the lower skirt member 11. The upper portion 120 b of the pivot lever 120 is guided horizontally displaceable in linear guides 16. At the same time, an actuating member in the form of a linear drive 121 is articulated at the lower portion 120a of the pivoting lever 120 in the second exemplary embodiment shown concretely here. This linear drive 121 makes it possible to bring the skirt elements 10, 11 at any desired time from its rest position to its protective position, and vice versa. This variant is therefore particularly suitable for elevator systems in which a premature opening of the shaft doors should be made, and therefore the apron must remain in protective position even during regular operation until the car anfährt the lowest stop where the apron must be retracted for reasons of space , The construction is, as is preferred, designed so that the linear drive, for example because its piston rod is retracted against the force of a spring, even in a power failure, ie when no supply voltage is available, the skirt elements 10, 11 automatically in its protective position bring where they lock. A locking takes place because the lower portion 120a of the pivot lever 120 articulated on both sides is. Due to this, it can not transmit compressive forces in the horizontal direction. Rather, it is so that this portion 120a of the pivot lever 120 tries to go even further in a vertical orientation, if it is loaded from the outside with forces acting in the horizontal direction. With a corresponding design of the linear guides 16, so to speak, the lower and the upper section of the pivot lever "wedge" and thus lock automatically or ideally self-locking. As far as the linear guides are designed so that no automatic or self-locking locking takes place, means should be used to ensure locking externally. For example, it makes sense to use the linear drive for locking and / or provide further means (such as spring-biased locking pins which engage corresponding recesses of the pivot lever 120), which prevent the upper portion 120b of the pivot lever continue to move in the linear guides 16 and can dodge.

In Fig. 2d is shown how the blockade can be canceled again if you want to go to the regular operating state. For this purpose, for example, in the upper apron element 10 (possibly instead also in the car floor) a small, possibly closed by a stopper opening provided, can be inserted through the means of a suitable push rod, the upper part 120a of the pivot lever 120 back into its horizontal linear guides ,

Of course, this embodiment can also be modified to the effect that the linear drive 121 is dispensed with. Instead, then locking means are provided which hold the running in the linear guides end 120 b of the pivot lever 120, as long as the skirt elements are to assume their rest position. In the event of a power failure, or whenever else the apron is to be activated, the blockade is released. The two skirt elements 10 and 11 fall under their own weight down, unfold and pull the portion 120b of the pivot lever out of its linear guides, so that the skirt elements under the influence of their own weight over the self in Fig. 2b (for the variant with linear drive) shown intermediate position 2c and can lock there, preferably automatically or self-locking, as described above.

Finally, FIGS. 3a to 3d show a third exemplary embodiment. This corresponds, at least as far as the kinematics of the two skirt elements 10 and 11, largely the first embodiment, unless otherwise described below. Only the guiding and locking means are designed differently here. Instead of a buckling lever 12, an actuating member 1200 is used here, which is articulated at the appropriate place as the articulated lever 12 at the lower apron element articulated. At the same time, the two skirt elements 10 and 11 are elastically biased against each other at this point by means of a suitable torsion spring 1200a such that the two skirt elements automatically fold when the piston rod of the linear drive retracts (FIGS. 3c, 3d). This actuating element 1200 is preferably a linear drive, ie a cylinder driven by an electric motor or by fluid pressure with a retractable and extendable piston or threaded rod (in the broadest sense), which ensures a corresponding actuation of the skirt elements. Preferably, a mechanism is provided which can extend the linear drive even in case of power failure such that it brings the skirt elements in the protective position and keeps locked there. For this purpose, the linear drive, for example, works against a spring accumulator, which can extend the linear drive on collapse of the supply voltage to the protection position. Preferably, a device is additionally provided which locks the linear drive, if no supply voltage is available, in that extended position corresponding to the protective position. This can be z. B. done by means of appropriate fishing hooks, which are held in normal operation by appropriate electromagnets in the released position and fall spring-loaded upon collapse of the supply voltage against the piston rod and then, when the piston rod has reached a corresponding position, engage in recess of the piston rod, the piston rod thus locked hold.

FIGS. 4a to 4c show a further example which largely corresponds to the above-described second exemplary embodiment. The difference here is that the lower end of the lower skirt element 11 (relative to the protective position) is provided with a roller which guides the lower end of this skirt element during unfolding, and especially when the protective position is reached, with respect to the shaft wall. Thus, in particular prevents due to any tolerances or irregularities on the shaft wall (cement splash, or the like, on the inside of the shaft wall), the lower end of the apron element 11 wedged against the shaft wall during deployment, so not pivoted into its final protective position and no Self-locking occurs. Moreover, such a role is especially advantageous if the car apron, z. B. due to "leading shaft door opening", should remain permanently unfolded.

Claims (9)

Safety system for an elevator with a lift cage (1) movable in a shaft (2) comprising a movable car apron (9) to be arranged in the threshold area of the elevator car (1) with a plurality of apron elements (10, 11) and at least one guide means guiding the movement of the apron elements ( 12, 120, 121, 1200, 1200a), wherein a first skirt member (10) is pivotally attachable to the underside of the car 1 and at least one further skirt member (11) is pivotally connected to the first, so that the skirt members (10, 11) from a sheltered position in which they hang downwardly oriented vertically from the floor area of the car (1), to a resting position in the area below the car floor in which they are folded relative to each other and pivoted inwardly towards the car floor, characterized in that the safety system comprises means (12, 13b, 13c) for securing the foldable apron elements (10, 11) are lockable in their protective position such that they can not be moved relative to one another or pivoted together in a slotwise direction by forces acting on one or more skirt elements (10, 11) from the outside in the baywise and substantially horizontal direction. Safety system according to claim 1, characterized in that the at least one folding movement of the skirt elements (10, 11) guiding means (12) is designed and so engages one of the skirt elements that it also acts in the protective position as a locking means by the skirt elements locked in their protective position against each other and at the same time against a common pivoting in the bay direction. Safety system according to one of the preceding claims, characterized in that, based on the intended mounted state, the axis about which at least one locking means is pivotally mounted on one of the skirt elements is below the axis, around which the car next apron element pivotally hinged to the car, and above the axis which connects the skirt elements foldable relative to each other. Safety system according to claim 3, characterized in that the at least one locking means comprises at least one pull or push rod (12) which is foldable in itself. A security system according to claim 3, characterized in that the at least one locking means comprises at least one telescopic actuating member (121; 1200). Safety system according to one of the preceding claims, characterized in that the skirt elements (10, 11) extend in their protective position approximately in a plane or at least approximately parallel to each other in two immediately adjacent planes, so that they form a substantially flat overall surface. Safety system according to one of the preceding claims, characterized in that the skirt elements (10, 11) are held in their rest position by another locking means (16) under the car floor in such a way that they automatically pivot into the protection position and lock there when the lock of the further locking means (16) is deactivated. Safety system according to one of the preceding claims, characterized in that monitoring devices are provided, by means of which it can be detected whether the skirt elements occupy their protective and / or their rest position properly. Safety system according to one of the preceding claims, characterized in that the lowermost apron element carries at least one roller and / or a sliding shoe in its lowermost region relative to the protective position, which leads to the lowest apron element when it strikes the shaft wall.

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