EP3693316B1 - Elevator safety device having an energy-saving trip device - Google Patents

Description

The invention relates to an elevator safety device with a special trigger according to the preamble of claim 1.

State of the art

Elevator safety devices have been in use in various forms for a long time. These are braking and safety gears or devices for limiting overspeed or for so-called shelter protection.

All of these elevator safety devices typically work with a trigger. This trigger activates the elevator safety device as soon as there is a need. To this end, the trigger is typically designed to be held in its ready position against the tension of a main spring. This main spring ensures that the trigger can act with the required force as soon as it is activated. Until activated, the trigger is held in its ready position, overcoming the force of the main spring. This holding is typically done using a purely mechanical solution, more recently also using an electromagnetic actuator capable of overcoming the force applied by the main spring.

As soon as the trigger is actuated, the electromagnetic forces applied by the actuator collapse and the trigger is pushed into its firing position by the force of the main spring.

In order to ensure reliable functioning of the trigger, a main spring (in one piece or made up of several spring elements) is generally used, which can apply sufficiently large spring forces. The consequence of this is that the actuator, which is also electromagnetic, has to apply relatively large forces in order to hold the trigger in its ready position, against the action of the main spring. Because of this, the electromagnetic actuator usually consumes a relatively large amount of energy.

From the WO 2011113753 A2 an elevator safety device with a trigger is known, whereby the trigger can be activated with the required force as soon as it is activated. Until then, the trigger is held in the ready position, overcoming the force of the main spring, which is held by a lever system. Furthermore, it is off EP2058262 an elevator safety device is known in which the trigger has a clutch approach in the form of a pawl.

The problem underlying the invention

Against this background, the invention is based on the problem of creating an elevator safety device with a trigger that consumes less energy in regular operation without having to use a weaker main spring, i.e. without having to cut back on the force that the trigger can raise when activated.

The solution according to the invention

This problem is solved with the means of claim 1.

The elevator safety device according to the invention has a trigger. The trigger lets the Address the elevator safety device as soon as it receives a corresponding, usually electrical, control signal, or if there has been a power failure. For this purpose, the trigger comprises an actuating member prestressed by means of at least one main spring that is one or more parts. The main spring gives the actuator the force it needs to do its job. At the same time, the elevator safety device has an electromagnetic actuator which, by means of the force generated by it electromagnetically, holds the actuating element against the tension of the main spring in its ready position, which it has to assume in regular, trouble-free elevator operation, while the actuating element is actuated by the main spring in its release position is brought as soon as the electromagnetically generated force of the actuator drops, ie completely collapses or at least drops so far that the actuator can no longer remain in its previous position. According to the invention, the electromagnetic actuator does not act directly, but only indirectly on the actuating member. A converter is provided as an intermediary between the actuator and the actuating member. The transducer is designed so that the force that the actuator must apply electromagnetically to hold the actuator in its ready position is less than the force generated by the tension of the main spring. Ideally, the force that the actuator must exert is at least 25%, and more preferably at least 50% less than the force generated by the main spring tension.

The elevator safety device is preferably designed in such a way that the elevator safety device additionally has at least one second electromagnetic actuator. The second actuator has the task of resetting the actuating member from its release position back to its ready position. The second actuator is equipped with a means by which it can be coupled again to the actuator located in the release position, which is initially completely separated from the second actuator in its release position. Furthermore, the second electromagnetic actuator is designed in such a way that it can move the actuating element back into its ready position against the force of the at least one spring.

Optionally, the first and second actuators can be identical.

In this case, the actuator is preferably an electric motor, which acts on the actuating member via a spindle drive that is not designed to be self-locking.

Preferably, the first actuator is continuously energized in regular elevator travel, while the second actuator is not energized in regular elevator travel.

A configuration of the elevator safety device in which the first electromagnetic actuator actuates a locking element is particularly preferred. The first actuator and the locking member are designed and interact in such a way that the actuating member is held positively locked in its ready position by the locking member as long as the first electromagnetic actuator is energized. Ideally, the forces of the main spring are derived in such a way that they do not load the first actuator because it is not in the flow of forces of the main spring. In contrast, the locking element is brought into a position by the first actuator or its auxiliary spring as soon as it is no longer energized or under-energized, in which the positive locking is canceled. One speaks of "undercurrent" when the first actuator is only energized so low that its holding force is no longer sufficient to compensate for the force of the auxiliary spring.

An elevator safety device claimed both in connection with claim 1 and independently thereof is designed as follows:
It has a trigger which has an actuating element prestressed by means of at least one main spring and an electromagnetic actuator which, by means of the force it generates electromagnetically, holds the actuating element in its ready position against the tension of the main spring. In contrast, the actuating element is brought into its release position by the main spring as soon as the electromagnetically generated force of the actuator falls. The actuator is a solenoid which, when energized, holds at least one blocking element or blocking rod against the action of an auxiliary spring in a position which forces positive engagement between at least one radially movable holding element and the actuating member. The auxiliary spring exerts no force on the actuator. It only has the function of moving the blocking element into a position in the de-energized or under-energized state of the solenoid in which the form-fitting engagement between the at least one retaining element and the actuating member can be canceled by the force of the main spring.

It is particularly preferred that the at least one retaining element or the at least one retaining ball, when the solenoid is energized, engages through a passage opening of a retaining tube in a form-fitting manner in the actuating element and is supported on the blocking rod, on the retaining tube and on the actuating element. The blocking rod is not in the flow of forces, at least as seen in the direction of its longitudinal axis. The force with which the main spring loads the actuator is from the actuator to the at least one holding element or the at least one Transfer retaining ball and passed from there to the retaining tube. This is because the holding element or the holding ball rests against the reveal of the passage opening of the holding tube.

Further modes of operation, refinements and advantages of the invention result from the exemplary embodiments described with reference to the figures.

character list

• the figure 1 shows a particularly preferred embodiment of a trigger according to the invention, the trigger is here in its ready position.
• the figure 2 shows the trigger according to figure 1 , but in its release position.
• the figure 3 shows the trigger according to the invention figure 1 in the first phase of its being retrieved from the release position to the ready position.
• the figure 4 shows the trigger according to the invention figure 1 in the second phase of its being retrieved from the release position to the ready position.
• the figure 5 shows a second, alternative embodiment of a trigger according to the invention.
• the figure 6 shows a third, again alternative embodiment of a trigger according to the invention.
• the figure 7 shows the trigger according to the invention in an elevator safety device in the form of a brake safety gear working with a chock.
• the figure 8 shows the trip device according to the invention in an elevator safety device in the form of a brake safety gear working with a brake roller.
• the figure 9 shows the trigger according to the invention in an elevator safety device in the form of a speed limiter for triggering mechanical safety gears via a speed limiter rope.
• the Figure. 10 shows the trigger according to the invention in an elevator safety device in the form of a protected area protection.
• the figure 11 shows the trigger according to the invention in an elevator safety device in the form of a device for synchronizing two brake or safety brake devices.

The first embodiment of a trigger

The invention will first be described with reference to the particularly preferred embodiment that Figures 1 to 4 demonstrate.

Based on figure 1 , which shows a particularly preferred exemplary embodiment, the basic structure of the trigger used according to the invention in the elevator safety device can be clearly explained.

The actuator and its function

The trigger 1 has an actuating member 2 on which a main spring 3 acts. In the present example, the actuating member 2 is designed in the manner of a push rod or a pressure piece which can, for example, press a brake wedge of a brake safety gear into a wedge gap—which will be explained in more detail later with reference to a figure.

It is clear that the actuating member 2 must apply a considerable force in order to be able to press the chock securely into the wedge gap, so that the elevator car is actually caught. This power must also be available in the event of a total power failure. To ensure this, the actuator 2 is when it's from figure 1 occupies the position shown, under the bias of the main spring 3. The main spring 3 is relatively strong, so that the actuating member 2 can become active with a sufficiently large force.

How to do well by comparing the Figures 1 to 4 the actuator 2 is movable sliding on the support tube 13 stored, while the holding tube 13 is in turn designed to be movable in translation, which will be explained in more detail later. For this purpose, the actuating member 2 preferably has an imaginary cross-section of a T that is hollow on the inside. The "stem" of the T forms a guide section. As a rule, the main spring 3 overlaps it on the outside, preferably in order to support/guide it. It runs with its inner circumference on the guide tube 13. The imaginary crossbar of the T forms a functional section with the help of which the actuating member can be held in its ready position.

The first actuator and the transducer cooperating with it

The actuator 2 is by a first electromagnetic actuator in its from the figure 1 shown ready position.

In this exemplary embodiment, this first electromagnetic actuator is a solenoid 11. However, this solenoid 11 does not act directly on the actuating element 2, but only indirectly via a converter. This converter is formed here by the blocking device or blocking rod 9 coupled directly to the solenoid 11 in conjunction with the at least two retaining balls 10 and the retaining tube 13 . The blocking rod is preferably translationally displaceable parallel to the direction of movement of the actuating member 2 . The holding tube has openings for the holding balls 10 to pass through. This preferred converter thus works according to the principle of the so-called ball locking bolt. For the sake of completeness, it should be said that instead of the retaining balls 10, differently designed retaining bodies can also be used, for example in the form of a pin, which then z. B. can be moved over a wedge-shaped portion of the retaining pin in the radial direction. This fact is not emphasized again below, if below by the particularly preferred retaining balls 10 is spoken, but unless otherwise stated, not only refer to the preferred balls in the true, narrow sense, but in a broader sense also holding bodies with non-spherical shape.

As can be seen, the actuator 2 has a clutch lug which allows the transducer 9, 10, 13 to positively interact with the actuator to hold it in its ready position.

The coupling attachment preferably has the shape of a recess 15 which is ideally attached to the inner circumference of the actuating member 2 which is hollow on the inside. In this recess 15, the retaining balls 10 have inserted. The retaining balls 10 each reach through a passage opening in the retaining tube 13. The retaining balls 10 are prevented by the blocking rod 9 from moving into the retaining tube 13 in a radially inward direction. In this way, the actuating member 2 is positively locked to the holding tube 13 . As a result, the actuating member 2 remains in its ready position. This condition lasts as long as the solenoid 11 is energized.

As soon as the solenoid 11 is no longer energized, for example because an arbitrary trigger signal is present which interrupts the current supply to the solenoid, or because the voltage supply has collapsed (blackout), the holding force developed by the solenoid collapses.

As a result, the auxiliary spring 12, which was previously held under tension by the holding force of the solenoid, can move the blocking rod 9, to the right in the present exemplary embodiment. The result of this is that the recess worked into the blocking rod comes to rest in the area radially below the retaining balls 10 . This allows the actuating element 2 with its ramp 17, with its recess 15 is preferably provided to displace the retaining balls 10 in the radially inward direction into the interior of the retaining tube 13 .

The actuating member 2 is thus released and can be brought into its release position by the main spring 3, in which it passes on the force imparted to it by the main spring 3 as intended. The actuator 2 now takes the figure 2 shown position.

The second actuator

A second electromagnetic actuator is used in order to return the actuating member 2 from its release position to its ready position and to prestress the main spring 3 again. This second electromagnetic actuator is implemented by the electric motor 6 in this exemplary embodiment. This motor 6 interacts with the support tube 13 in such a way that it can translate it back and forth. The motor is preferably a rotary motor, since such a motor is usually significantly cheaper than a linear motor with the same performance, not least because it can work with a gear reduction.

In the present case, the motor 6 preferably acts on the holding tube 13 with the aid of a ball screw drive. Ideally, the ball screw is designed to be self-locking, so that the main spring 3 also does not cause the ball screw to rotate (if possible not under the influence of general operating vibrations) when the motor 6 is switched off and no longer applies any torque.

In order to initiate the return of the actuator 2 from its release position to its ready position, the motor 6 moves the support tube 13 towards the in Triggering position located actuator - in the embodiment shown here in the drawing so to the right.

As a result, the holding tube 13 comes out of its in figure 2 shown position to that of figure 3 position shown. This is characterized in that the through-openings in the holding tube, through which the holding balls 10 can be pressed outwards in the radial direction, now overlap again with the recess 15 of the actuating member 2 in the radial direction.

After the holding tube has reached this position, the motor 6 is temporarily stopped. Now the first actuator is activated again. In the specific case, this means that the solenoid 11 is energized again. As a result, the solenoid 11 pulls the blocking rod 9 against the force of the auxiliary spring 12, in the present exemplary embodiment to the left. The consequence of this is that the retaining balls 10 are pushed back by the blocking rod 9 radially outwards through the passage openings in the retaining tube 13 into the recess 15 of the actuating member 2 and are blocked in this position. As a result, the holding tube 13 and the actuating member 2 are now again positively connected or locked to one another. The first actuator now remains activated until the next trigger case, i. H. energized.

Now the second actuator comes into action again. For this purpose, the motor 6 is reversibly energized in such a way that it pulls the holding tube 13 back into the position (to the left in the case shown in the figure) in which the holding tube holds the actuating element in its ready position against the force of the main spring 3 .

The holding tube 13 is from its figure 4 shown position back to that of figure 1 shown position returned. The comparatively strong motor tensions the main spring 3 without difficulty and preferably also brings additional power as so-called. Useful power, z. B. Force with which a chock is pulled out of the wedge gap, or force that moves any component other than the actuator.

Thus, the actuator 2 has again reached its standby position and is ready for the next use.

It is particularly favorable to use a ball or rolling body screw drive (the terms are used synonymously below) in order to establish an operative connection between the motor 6 and the holding tube 13 . A ball screw drive consists of a threaded sleeve that acts on a threaded rod via balls. As a rule, the threaded sleeve is driven by a motor, while the threaded rod forms the output, which is also preferred here.

On the one hand, a ball screw drive is the method of choice because it minimizes friction losses and implements a high speed reduction ratio, so that a significantly smaller and higher-revving motor is sufficient.

On the other hand, the ball screw saves the holding tube 13 from rotating. This makes it very easy to accommodate inside the holding tube 13 the first electromagnetic actuator 4 in the form of the solenoid 11, which would be more difficult because of the power supply when the holding tube 13 rotates itself.

The construction of this exemplary embodiment is distinguished by its particularly compact dimensions, which are made possible by the fact that the blocking rod 9 is accommodated in the holding tube 13 .

The design is also characterized by its particularly low power consumption during operation. In order to keep the actuating element 2 in its ready position, only the solenoid 11 has to be energized during operation. The solenoid 11, which is generally to be energized over a long period of time, can be comparatively weak because it does not have to apply any force itself to compensate for the force of the significantly stronger main spring 3. Instead, the solenoid 11 only has to apply that much smaller force that is required to overcome the force of the auxiliary spring 12, against which the blocking rod 9 must be held in its blocking-ensuring position. This saves considerable energy.

The motor, which implements the second actuator here, can be strong and draw a correspondingly large amount of current. In this way and as a result of the thread reduction, with the help of which the motor acts on the actuator 2, the motor 6 can apply large restoring forces - as z. B. are necessary to pull a chock back out of the wedge gap between the guide rail and the actual brake body. The high power consumption of the motor or second actuator is not significant for the energy balance, since this only has to be energized for a short time for the reset process and can then be switched off again permanently until the next "recovery" after "triggering".

Finally, the strengths of this exemplary embodiment should be discussed again in summary.

The first actuator, in the form of the solenoid 11 in this embodiment, is housed entirely or at least mostly within the second actuator, which in this embodiment is in the form of an electric motor 6 . This saves a considerable amount of space and makes the trigger 1 smaller.

The converter, which is implemented in this exemplary embodiment by the blocking rod 9 , the retaining balls 10 or the retaining body and the retaining tube 13 , is accommodated predominantly (or at least 1/3) within the actuating member 2 . This also allows a very compact design.

The second embodiment of a trigger

the figure 5 shows the basic functional principle of a further, alternative exemplary embodiment for a trigger 1 to be used according to the invention.

The actuator

The actuating element 2 can be clearly seen here, which is prestressed by the main spring 3 and, after it has been released, receives the force from the main spring 3 which presses the actuating element 2 into its release position and which conveys the force which the actuating element 2 has to raise in order to fulfill its intended function.

The first actuator

Also clearly visible here is the first electromagnetic actuator 4, which is used here to hold the actuating element 2 in its ready position and which is de-energized in order to release the actuating element 2 so that it is brought into its release position by the main spring 3 can be.

The first electromagnetic actuator 4 consists here of a solenoid 11 and a rocker 19, which is mounted on a threaded nut 24 are arranged or are in operative connection with such. The solenoid acts on the rocker 19.

The second actuator

The threaded spindle 20 is driven by an electric motor 6 and as a result moves the threaded nut 24 back and forth in a translatory manner if required. The threaded spindle 20, its electric motor 6 and the threaded nut 24 form the second actuator here.

The shifter

The rocker 19 forms the converter in this embodiment.

For this purpose, the rocker 19 is pivoted eccentrically at the bearing point 21. In this way, the rocker has a short lever arm 22 and a long lever arm 23. The short lever arm 22 interacts with the actuating element 2 in order to move the actuating element 2 in its to hold a ready position. The long lever arm 23 of the rocker interacts with the solenoid 11. This means that the long lever arm 23 is acted upon by the solenoid 11 with a torque as long as the solenoid 11 is energized. The moment the solenoid 11 is no longer energized, the long lever arm 23 is released. The consequence of this is that the actuating element 2 acted upon by a force by the main spring 3 can push the rocker 19 aside. This allows the actuator 2 to leave its standby position. The force of the main spring 3 pushes it into its release position. The actuating element 2 passes the solenoid 11.

The electric motor 6 is actuated in order to bring the actuating member 2 back from its release position into its ready position. With the help of the threaded spindle 20, he moves the threaded nut 24 and thus the solenoid 11 fastened to it in such a way that the actuating element 2 again happens. As a result, the solenoid 11, together with its rocker 19, returns to a position in which the solenoid 11 can be energized. As a result, it pulls the rocker back on and thereby brings the rocker 19 back into a position in which the rocker 19 is coupled to the actuating member 2 again. The motor is now energized in such a way that it moves the solenoid 11 together with the rocker 19 held by it and the actuating member 2 back into its ready position against the force of the main spring 3 .

Because the rocker 19, as mentioned, has lever arms 22 and 23 of different lengths, it can be ensured that the solenoid 11 only has to develop relatively small forces to hold the actuating element 2 in its ready position and therefore only has to be supplied with a weak current. For example, if the long lever arm 23 of the rocker 19 is five times longer than the short lever arm 22, then the holding force that the solenoid 11 must apply to hold the actuator 2 in its ready position is five times smaller than the spring force that the main Spring 3 applies and with which the main spring 3 attempts to press the actuator 2 from its ready position into its release position.

It is preferably the case that the long lever arm 23 is longer by at least a factor of 2, ideally at least by a factor of 3, than the short lever arm 22.

It should also be noted that the threaded spindle 20 preferably has a pitch that gives it self-locking. This means that the threaded spindle 20 does not then either under the influence of the force acting on the actuating member 2, the main spring 3 begins to turn automatically when the electric motor 6 is switched off.

The third embodiment of a trigger

the figure 6 shows an alternative third exemplary embodiment for the trigger 1 to be used according to the invention.

It should be said in advance that what is special about this exemplary embodiment is that the first electromagnetic actuator 4 and the second electromagnetic actuator 5 coincide, ie only a single electromagnetic actuator is required. This implements both the function of the first electromagnetic actuator and the function of the second electromagnetic actuator, which are provided separately from one another in the other exemplary embodiments.

The actuator

As can be seen, there is also an actuating element 2 in this exemplary embodiment, which is held in its ready position against the tension or force of the main spring 3 .

the actuator

Once again, an electric motor 6 is provided here as the only actuator.

The shifter

A threaded spindle 20, on which a threaded nut 24 runs, is used here again as a converter.

The threaded nut 24 is designed in such a way that it can act on the actuating element 2 in a form-fitting manner.

In the of figure 6 shown situation is the actuator 2 in its standby position. This is because the threaded nut 24 interacts in a form-fitting manner with the actuating element 2 in such a way that the main spring 3 is not able to press the actuating element 2 from its readiness position shown into its release position. For this purpose, the motor 6 is permanently energized. Because the threaded spindle 20 is provided here with a pitch that does not realize any self-locking. This means that the threaded spindle 20 starts rotating under the influence of the force transmitted from the main spring 3 to the actuator 2 at the moment when the motor 6 is no longer energized. The threaded spindle 20 then begins to rotate so that the threaded nut 24 moves in translation, in the present case figure 6 To the right. As a result, the main spring 3 can transfer the actuating element 2 from its ready position to its release position and give the actuating element 2 the force required for the intended actuation.

Nevertheless, it is also the case in the present case that the motor 6 only has to apply a fraction of the force of the main spring 3 in order to hold the actuating element 2 in its ready position. This is because the threaded spindle 20 also represents a converter here, which implements a translation. The translation realized depends on the pitch of the threaded spindle 20 .

The use of a trigger according to the invention in a brake safety gear working with a chock

While the figures explained so far have only shown the trigger according to the invention, shows the figure 7 an example of the elevator safety device ASE according to the invention as a whole. This is a safety gear of a known type. Such a safety gear consists, among other things, of a so-called chock 30 and a counter-brake lining 31. The chock 30 and the counter-brake lining 31 are positioned on two different sides of a guide rail. The chock 30 is held in its ready position by a trigger 1 of the type previously discussed. For this purpose, the chock 30 is in operative connection with the actuating member 2 of the trigger 1 . When the trigger 1 is activated, for example in the event of overspeed, the actuator 2 presses the chock 30 against the guide rail under the influence of the force of its main spring 3, which is not visible in this figure because it is hidden in the trigger housing. In the through the figure 7 case shown presses the actuator 2 of the trigger 1, the chock 30 upwards.

Since the chock 30 is provided with a sloping guide device 32, it thereby comes into contact with the guide rail. Once the chock 30 with is pressed against the guide rail with sufficient normal force, such a high frictional force arises between the guide rail and the chock 30 that the chock 30 is thereby driven deeper into the wedge gap. This causes the brake wedge 30 and the counter-brake lining 31 to so to speak clamp the guide rail between them. In this way, the car is first braked hard and then the car caught.

If you now imagine that the trigger 1, for example, a trigger of the Figures 1 to 4 described type (which is not mandatory, triggers of the Figures 5 and 6 described type can also be used here), then one can easily understand that the electric motor 6 due to the fact that it does not act directly on the actuating member, but with a strong transmission through the converter in the form of the spindle drive 7 and the holding tube 13 on the Actuator 2 is able to withdraw the chock again even if it has been driven into the wedge gap with a relatively high force.

The use of a trigger according to the invention in a brake safety gear working with a brake roller

the figure 8 shows another embodiment of an elevator safety device according to the invention with a trigger based on the Figures 4 to 6 type described as an example. The basic functional principle of this safety gear works like that in the previously published patent application WO 2008/011896 A1 is described. The safety brake device thus does not use a chock here, but a roller 41 which, after activation of the safety brake device, moves into a wedge gap is driven in and, together with the counter-brake lining 44, clamps the guide rail between them, so that strong braking is achieved again and, if necessary, then a catch.

Only the actuation takes place in this safety gear somewhat differently than in the similar safety gear according to the patent application WO 2008/011896 A1 . Actuation takes place here via a pivoted lever 40 which rotates about a pivot point 45 . The swing lever 40 holds a roller 41 by means of a swing bar 43. An auxiliary spring 42 is provided which holds the roller 41 via the swing bar 43 in a retracted position.

The whole thing is actuated by a trigger 1 of the type according to the invention described above figure 8 shown position. In this position of the pivoting lever 40, the roller 41 does not come into contact with the guide rail.

As soon as the trigger 1 is activated, its actuating member 2 pushes the pivoting lever towards the guide rail with the force of the main spring, not shown in this figure because it is housed in the casing of the trigger. As a result, the roller 41 comes into contact with the guide rail (not shown in the drawing). It is thereby driven into the wedge gap, just like the patent application WO 2008/011896 A1 describes. In the course of this, the auxiliary spring 42 is compressed and the pivot rod 43 is pivoted. The latter thus follows the roller 41 moving into the nip, again in principle as described in the patent application WO 2008/011896 A1 described. In order to deactivate the progressive safety gear again, the car is raised or lowered a little (depending on whether was caught while going up or while going down). As a result, the roller 41 moves out of the nip again.

The actuating member 2 of the trigger 1 is then returned from its triggering position to its ready position, as described at the beginning of each of the three exemplary embodiments for the trigger 1 . As a result, the pivoting lever 40 together with the roller 41 held by it is moved away from the guide rail so that the safety brake device is completely deactivated again.

The use of a trigger according to the invention on the speed limiter

the figure 9 shows a further exemplary embodiment of an elevator safety device according to the invention, in the form of a speed limiter. As soon as the trigger is activated, a governor rope (not shown in the drawing) is braked via the lever B and the safety gears on the elevator car are activated via the force generated in the process.

The use of a trigger according to the invention for protecting a shelter

the figure 10 shows a further exemplary embodiment of an elevator safety device according to the invention, in the form of a protected area protection. As soon as their triggers are activated, they slide movement limiters B into the car's track.

The use of a trigger according to the invention for synchronizing two braking devices

the figure 11 shows another embodiment of an elevator safety device according to the invention with a pair used here as a tandem pair of those triggers whose design based on the Figures 4 to 6 has been described as an example.

As soon as the triggers are activated, the force of the main springs (not visible here) is applied to the actuating elements 2, so that the rod S exerts a force in both directions, which causes the braking or braking safety gears to engage.

Final remark

Protection for a pull-out safety device is also claimed independently of the claims made so far, in which the actuating member is held in its ready position by positive locking and preferably with the help of a mechanism against the force of the main spring, which is designed in the manner of a ball locking bolt, with preferably balls are used, in a broader sense, instead of balls, locking pins can also be used.

Protection for an elevator safety device with a trigger (1) is also claimed independently of the claims made to date, which has an actuating element (2) prestressed with the aid of at least one main spring (3) and an electromagnetic actuator (4), which controls the actuating element (2nd ) by means of it electromagnetically generated force against the tension of the main spring (3) in its ready position, while the actuating member (2) is brought into its release position by the main spring (3) as soon as the electromagnetically generated force of the actuator (4) falls, thereby characterized in that the electromagnetic actuator (4) acts on the actuating member (2) via a converter, the converter being designed in such a way that the force which the actuator (4) has to apply electromagnetically moves the actuating member (2) in its ready position to hold is smaller than the force generated by the tension of the main spring (3).

Even independently of the claims made so far, protection for an elevator safety device is provided, which is characterized in that the converter is provided by a blocking device or blocking rod 9 coupled directly to the actuator (4) in combination with a holding element (10) and a holding tube (13). is formed and the actuator (4) holds the blocking element or the blocking rod (9) against the action of an auxiliary spring (12) in a position which allows positive engagement between the at least one radially movable holding element (10) and the actuating member (2). forces, the auxiliary spring (12) displacing the blocking element in the de-energized or under-energized state of the actuator (4) into a position in which the form-fitting engagement between the at least one holding element and the actuating member (2) is caused by the force of the main spring ( 3) can be canceled.

Protection is also claimed for an elevator safety device, which is characterized in that the elevator safety device (ASE) also has at least one second electromagnetic actuator (5), which has a means by which it returns to the trigger position Couple the actuating element (2). can, wherein the second electromagnetic actuator (5) is designed so that it can move the actuating member (2) back to its standby position against the force of the at least one main spring (3) after recoupling.

Protection is also claimed for an elevator safety device, which is characterized in that the first and the second actuator are identical, independently of the claims made up to now.

Protection for an elevator safety device is also claimed independently of the previous claims, which is characterized in that the actuator is an electric motor (6) which acts on the actuating element (2) via a screw drive (7) that is not designed to be self-locking.

Protection for an elevator safety device is also claimed independently of the previous claims, which is characterized in that the first actuator (4) is continuously energized in regular elevator operation, while the second actuator (5) is not energized in regular elevator operation.

Protection for an elevator safety device is also claimed independently of the claims made so far, which is characterized in that the first electromagnetic actuator (4) actuates a locking element (9, 10, 13) forming the converter, the first actuator (4) and the locking element (9, 10, 13) are designed and interact in such a way that the actuating element (2) is held positively locked in its ready position by the locking element (9, 10, 13) as long as the first electromagnetic actuator (4) is energized and that Locking member (9, 10, 13) or part of it is brought into a position by the first actuator (4) as soon as it is no longer energized or under-energized, in which the form-fitting locking is canceled.

Protection for an elevator safety device is also claimed independently of the claims made so far, which is characterized in that the forces of the main spring (3) are diverted by a locking element (9, 10, 13) in such a way that they block the first actuator (4th ) do not load, because it is completely outside the power flow of the main spring (3).

Protection for an elevator safety device (ASE) with a trigger (1) is also claimed independently of the claims made to date, which has an actuating element (2) pretensioned with the aid of at least one main spring (3) and an electromagnetic actuator (4) which The actuating element (2) is held in its ready position by means of the force generated by it electromagnetically against the tension of the main spring (3), while the actuating element (2) is brought into its release position by the main spring (3) as soon as the electromagnetically generated force of the actuator (4), characterized in that the actuator (4) is a solenoid (11) which, when energized, holds at least one blocking element or blocking rod (9) against the action of an auxiliary spring in a position which positive engagement between at least one radially movable holding element (10) and the actuating member (2) forces, wherein the auxiliary spring (12) the Blo When the solenoid (11) is in a de-energized or under-energized state, the backing element moves into a position in which the form-fitting engagement between the at least one holding element and the actuating member (2) can be canceled by the force of the main spring (3).

Also independent of the previously established claims, protection for an elevator safety device is claimed, which is characterized in that the at least one retaining element or the at least one retaining ball (10) when energized solenoid (11) through a passage opening of a Holding tube (13) engages positively in the actuating member (2) and is supported both on the blocking rod (9), on the holding tube (13) and on the actuating member (2).

Protection is also claimed for an elevator safety device, which is characterized in that the holding tube can be driven in such a way that it executes a translatory movement, preferably a purely translatory movement, independently of the claims made up to now.

Protection for an elevator safety device is also claimed independently of the previously made claims, which is characterized in that the holding tube can be driven with the aid of a screw drive, preferably with the aid of a rolling body screw drive.

Protection for an elevator safety device is also claimed independently of the claims made so far, which is characterized in that the solenoid (11) that actuates the blocking rod (9) or the blocking element is at least partially, preferably completely, inside the motor (6). drives the holding tube (13).

Protection is also claimed for an elevator safety device, which is characterized in that the blocking rod (9) or the blocking element is arranged at least partially, preferably completely, inside the holding tube (13) independently of the claims made up to now.

Protection for an elevator safety device is also claimed independently of the claims made so far, which is characterized in that the blocking rod (9) or the blocking element and the holding tube (13) are at least partially, preferably over the majority of their length, inside the main -Spring (3) are arranged.

Protection is also claimed for an elevator safety device, which is characterized in that the at least one retaining element or the at least one retaining ball (10) is arranged inside the actuating member (2), independently of the claims made to date.

Protection is also claimed for an elevator safety device, which is characterized in that the actuating member (2) is held in its ready position against the force of the main spring (3) by means of a mechanism designed in the manner of a ball locking bolt, independently of the claims made up to now is.

The preceding paragraphs claim protection for an elevator safety device alone and/or in combination with the individual features of the respective paragraphs.

Reference List

1

trigger

2

actuator

3

main spring

4

(first) electromagnetic actuator

5

(second) electromagnetic actuator

6

electric motor

7

spindle drive

8th

locking device

9

Blocking rod or blocking element

10

Retaining ball or retaining element

11

solenoid

12

auxiliary spring

13

holding tube

14

(not assigned)

15

Recess of the actuator

16

passage opening of the holding tube

17

ramp

18

(not assigned)

19

seesaw

20

lead screw

21

storage point

22

short lever arm of the seesaw

23

long lever arm of the seesaw

24

threaded nut

25 - 29

(not assigned)

30

chock

31

counter brake lining

32

guide device

33 - 39

(not assigned)

40

swing lever

41

role

42

auxiliary spring

43

swivel bar

44

counter brake lining

45

pivot point

ASE

elevator safety device

S

pole

B

Motion limiters/brake levers

Claims (17)

1. Elevator safety device (ASE), characterized in that an actuating element (2) is held in its standby position against the force of a main spring (3) by means of a mechanism which is designed in the form of a ball locking bolt, wherein retaining bodies such as retaining balls (10) or locking pins are used in the ball locking bolt, wherein the actuating element (2) has a coupling attachment in the form of a recess (15), into which the retaining bodies are inserted in the standby position and which enables a converter (9, 10, 13) to interact with the actuating element in a positively locking manner in order to keep it in its standby position.
2. The elevator safety device (ASE) according to claim 1, characterized in that the elevator safety device (ASE) comprises a trigger which has the actuating element (2) preloaded by means of at least the main spring (3) and an electromagnetic actuator (4) which holds the actuating element (2) in its standby position by means of the electromagnetically generated force against the tension of the main spring (3), while the actuating element (2) is brought into its triggering position by the main spring (3) as soon as the electromagnetic force of the actuator (4) drops, wherein the electromagnetic actuator (4) acts on the actuating element (2) via the converter, wherein the converter is designed in such a way that the force the actuator (4) has to apply electromagnetically in order to hold the actuating element (2 ) in its standby position is smaller than the force generated by the tension of the main spring (3).
3. The elevator safety device (ASE) according to claim 1 or 2, characterized in that the converter is formed by a blocking device or blocking rod (9) directly coupled to an actuator (4) in combination with the retaining element (10) and a retaining tube (13) and the actuator (4) holds the blocking element or the blocking rod (9) against the effect of an auxiliary spring (12) in a position which forces a positive engagement between the at least one radially movable retaining element (10) and the actuating element (2), wherein, when the actuator (4) is not energized or not sufficiently energized, the auxiliary spring (12) moves the blocking element into a position in which the positive engagement between the at least one retaining element and the actuating element (2) can be released by the force of the main spring (3).
4. The elevator safety device (ASE) according to claim 2 or 3, characterized in that the elevator safety device (ASE) additionally has at least a second electromagnetic actuator (5) comprising a means by which it can be coupled back to the actuating element (2) being in the triggering position, wherein the second electromagnetic actuator (5) is designed in such a way that, after recoupling, it can move the actuating element (2) back into its standby position against the force of the at least one main spring (3).
5. The elevator safety device (ASE) according to claim 4, characterized in that the first and the second actuators are identical.
6. The elevator safety device (ASE) according to claim 5, characterized in that the actuator is an electric motor (6) which acts on the actuating element (2) via a non-self-locking screw drive (7).
7. The elevator safety device (ASE) according to claims 2 and 4, characterized in that the first actuator (4) is permanently energized during regular elevator operation, while the second actuator (5) is not energized during regular elevator operation.
8. The elevator safety device (ASE) according to claims 2 and 4 or according to claim 7, characterized in that the first electromagnetic actuator (4) actuates the locking element (9, 10, 13) forming the converter, wherein the first actuator (4) and the locking element (9, 10, 13) are designed and cooperate in such a way that, as long as the first electromagnetic actuator (4) is energized, the actuating element (2) is held in a positively locked manner by the locking element (9, 10, 13) in its standby position, and, as soon as the first actuator (4) is no longer energized or not sufficiently energized, the locking element (9, 10, 13) or a part of it is brought by the first actuator (4) into a position, in which the positive locking is released.
9. The elevator safety device (ASE) according to one of the preceding claims 2 to 8, characterized in that the forces of the main spring (3) are diverted by a locking element (9, 10, 13) in such a way that they do not load the first actuator (4), because it is completely outside the power flow of the main spring (3).
10. The elevator safety device (ASE) according to claim 1, wherein the elevator safety device (ASE) comprises a trigger (1) which has the actuating element (2) preloaded by means of at least the main spring (3) and an electromagnetic actuator (4) which holds the actuating element (2) in its standby position by means of the electromagnetically generated force against the tension of the main spring (3), while the actuating element (2) is brought into its triggering position by the main spring (3) as soon as the electromagnetically generated force of the actuator (4) drops, wherein the actuator (4) is a solenoid (11) which, when energized, holds at least one blocking element or blocking rod (9) against the effect of an auxiliary spring (12) in a position which forces a positive engagement between at least one radially movable retaining element (10) and the actuating element (2), wherein, when the solenoid (11) is not energized or not sufficiently energized, the auxiliary spring (12) moves the blocking element into a position in which the positive engagement between the at least one retaining element and the actuating element (2) can be cancelled by the force of the main spring (3).
11. The elevator safety device (ASE) according to claim 10, characterized in that, when the solenoid (11) is energized, the at least one retaining element or the at least one retaining ball (10) engages positively into the actuating element (2) through a passage opening of a retaining tube (13), and, when doing so, it is supported both by the blocking rod (9), the retaining tube (13) and the actuating element (2).
12. The elevator safety device (ASE) according to claim 10 or 11, characterized in that the retaining tube can be driven in such a way that it executes a translational movement, preferably a purely translational movement.
13. The elevator safety device (ASE) according to one of claims 10 to 12,
    characterized in that the retaining tube can be driven by means of a screw drive, preferably by means of a rolling-body screw drive.
14. The elevator safety device (ASE) according to one of claims 10 to 13,
    characterized in that the solenoid (11) actuating the blocking rod (9) or the blocking element is positioned at least partially, preferably completely, inside the motor (6) that drives the retaining tube (13).
15. The elevator safety device (ASE) according to one of claims 10 to 14,
    characterized in that the blocking rod (9) or the blocking element is arranged at least partially, preferably completely, inside the retaining tube (13).
16. The elevator safety device (ASE) according to one of claims 10 to 15,
    characterized in that the blocking rod (9) or the blocking element and the retaining tube (13) are arranged at least partially, preferably over the major part of their length, inside the main spring (3).
17. The elevator safety device (ASE) according to one of claims 10 to 13,
    characterized in that the at least one retaining element or the at least one retaining ball (10) is arranged inside the actuating element (2).

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