EP2651809B1 - Actuation of an intercepting apparatus - Google Patents

Description

The invention relates to an elevator installation with a safety gear and a device for actuating the safety gear and a corresponding method for actuating a safety gear.

Elevator systems are installed in a building. They consist essentially of an elevator car, which are connected via suspension means, such as suspension ropes or carrying straps, with a counterweight or with a second elevator car. By means of a drive, which acts selectively on the support means, directly on the cabin or the counterweight, the cabin is moved along, substantially vertical, guide rails. The elevator system is used to transport people and goods within the building over single or multiple floors.

The elevator system includes devices to secure the elevator car in the event of failure of the drive or the suspension means or to protect even with a stop in a floor from unwanted drifting or crashes. For this purpose, safety devices are usually used, which can slow down the elevator car on the guide rails in case of need.

To date, such safety gears have been activated by mechanical speed limiters. Increasingly, however, electronic monitoring devices are also used today, which can activate braking or safety gear if required.

In order to still be able to fall back on known and proven catching devices electromechanical actuator units are required, which can operate with appropriate control safety gears.

Out EP0543154 Such a device is known. Here, an auxiliary caliper brake is required, with a guide rail engaged and this auxiliary caliper brake operates an existing lever system whereby safety gears are operated. This auxiliary clamp brake is designed to move the lever system and mass parts of the safety gear, or operate the safety gear can. The required electromagnetic units must be sized accordingly large.

Out WO 2008/057116 a similar device is known. In this case, a driving body arranged in a safety gear is, if necessary, pressed against a guide rail, whereby the safety gear is actuated.

Out US7575099 is another such device known. In this solution, if necessary, the safety catch of a safety gear can be operated directly by springs. The springs are biased by an electromagnet and the preloaded springs are released if necessary. The springs can be reset or tensioned by a spindle drive. Also, this solenoid is to be dimensioned correspondingly large, since the entire biasing force of several springs must be directly recorded and maintained.

The invention thus aims to provide at least one alternative solution for actuating a safety gear in an elevator installation by means of electrical control and its integration into the elevator installation.

This solution or solutions should be able to be combined with conventional safety gears and they should be safe.

Other aspects such as a quick operation of the safety gear, low energy consumption, ease of installation, behavior of the device in case of power failure or component faults should be taken into account.

The solutions defined in the independent patent claims fulfill at least some of these requirements and, with their embodiments according to the dependent claims, take into account significant additional useful aspects.

An elevator system is used to transport goods and people in buildings. The elevator system includes at least one elevator car for receiving persons and goods, and usually a counterweight. Counterweight and elevator car are connected to each other via one or more support means, such as a support cable, a carrying strap or other suspension means. These support means are guided over a deflection roller, or a drive pulley and the counterweight and the elevator car thus move against each other in the building, or in one in the building provided elevator shaft. In order to prevent a crash of the cabin and occasionally the counterweight, or to prevent other misconduct of this car body - under the car is both the elevator car as well as the counterweight understood below - is at least the elevator car and occasionally the counterweight with a safety gear equipped. A drive body usually includes two safety gears, which are each associated with a guide rail. The guide rails - usually two guide rails - lead the carriage along the elevator shaft and they include a bridge on which the safety gear can intervene for the purpose of braking. To operate the safety gear is to raise a catch element, such as a catch wedge, a fishing reel or a catch eccentric or to rotate to a catching position. Such an embodiment of a conventional safety gear, for example, an eccentric safety gear. In this case, in order to initialize a braking or catching process, the catch element must be rotated in the form of an eccentric, so that it comes into contact with the guide rail, he then clamp this and thus can build up a clamping and braking force.

A solution now provides that an arranged on the drive body and related to the safety gear device for actuating the safety device actuates the safety gear, or lifts the catch or the fishing reel or rotates the catch element in the catching position. The device for actuating the safety gear includes for this purpose at least one driving body, which is pivotally mounted on the drive body. If necessary, the driving body is pressed against the elevator shaft, or preferably to the guide or brake rail. By a relative movement between the pressed driving body and the safety gear, the operation of the safety gear takes place. The relative movement arises from the fact that the driving body, which is pressed against the elevator shaft, or the guide or the brake rail is held at the point of contact with the rail and the traveling vehicle further moves with the safety gear relative to this point. The driving body advantageously includes a curved driving surface and it is arranged pivotably about an axis of rotation in the device for the operation of the safety gear. In this embodiment, the preferably curved driving surface can now pivot the driving body and thus lift the catching wedge or the fishing reel or the catching element turn to the catching position. The driving body is connected to a connecting rod to the catch wedge, the fishing reel or the catch element.

Preferably, the device for operating the safety gear directly above the safety gear above or below it is arranged in a separate housing.

With such a device for the operation of the safety gear, the safety gear can be operated quickly and safely. The driving body can be operated independently of the safety gear and it can be connected by means of the connecting rod to existing safety gears. Also, the axis of rotation, or the pivot can be easily attached to a housing of the device for the operation of the safety gear, or integrate into this.

Alternatively, the axis of rotation or the pivot point can also be integrated into a housing of the safety gear.

In one embodiment, the curved driving surface is designed such that a pressing force of the driving body to the elevator shaft, or the guide or brake rail, increases over a pivoting range of the driving body. On the design of the curved driving surface can thus be achieved that with a rather low pressing force, the pivoting can be initialized and that on the pivot angle, the pressing force increases and thus the force is available to operate the safety gear also increases.

In one embodiment variant, the drive body, which is arranged to be movable along at least two guide rails or brake rails, is equipped with at least two safety gears. In this case, a first safety device interacts with a first guide or brake rail and a second safety device interacts with a second guide or brake rail. Both safety gears are each connected to a device for the operation of the safety gear and can be operated by this if necessary. The two axes of rotation of the two driving bodies are coupled together in a preferred embodiment, that is, for example, connected by means of a connecting shaft. The two driving bodies are thus pivoted together. The two devices for the operation of the safety gear are thus coupled together so that both means for the operation of the safety gear and thus the two safety gears in

Essentially synchronously operated.

This prevents unbalanced actuation of the safety gear.

In one embodiment variant, each of the means for operating the safety gear is designed so that it alone is able to operate the coupled via the rotational axis of the driving body safety gear. The safety of the elevator system is increased. The two devices for the operation of the safety gear can be controlled together and they thus actuate the respective associated safety gear. If, for example, one of the two devices for actuating the safety gear fails, the remaining device is entirely capable of actuating both safety gears.

In one embodiment, the curved driving surface of the driving body is connected via a freewheel device with the safety gear. About a first portion of the relative movement between the to the elevator shaft, or preferably to the guide or brake rail, pressed driving body and the safety gear only the driving body is pivoted, whereby the pressing force of the driving body to the elevator shaft, or increases the guide or brake rail becomes. Only over a second range of relative movement then the safety gear is operated. This in turn causes the pressing force in the first step of the actuation process can be kept low, since only the driving body itself must be pivoted. About this first area increases, because of the correspondingly shaped curved driving surface, the pressing force and accordingly is then in the second region of the relative movement, an increased actuating force for actuating the safety gear itself available.

In one embodiment, the driving body is by means of a pressure spring, preferably by means of a compression spring, to the elevator shaft, or to the guide or the brake rail, pressed and he is by means of an electromagnet in a standby position preserved. This version is very safe. In case of failure of a control or energy loss of the electromagnet inevitably falls off and the pressure spring presses the driving body. Preferably, the electromagnets are interconnected by two means for operating the safety gear in series. This additionally ensures that the triggering of arranged on both sides of the vehicle body safety gear takes place synchronously. Alternatively, the solenoid can only relieve a delivery device, so that the driving body, for example, held by a spring from the elevator shaft, or from the guide or brake rail is kept distanced.

In one embodiment, the driving body includes a movable and a fixed driving part. The movable entrainment member is by means of the pressure spring to the elevator shaft, or to the guide or brake rail, pressed and the electromagnet can hold the movable driving part in the standby position. The movable driving part is advantageously guided in the fixed driving part. The movable entrainment part can be made small and with low mass. Thus, the reaction time can be kept small. In this case, the movable entrainment part establishes the first frictional contact with the elevator shaft or the guide or brake rail. After a small pivoting movement of the frictional contact of the movable driving part is transferred to the fixed driving part, which ensures the further pivotal movement from this point. The driving surface of the driving body is formed by the movable and the fixed driving part together. Preferably, this driving surface is handy, for example, executed with an embossing, with a knurling or other structured surface. Preferably, the electromagnet which holds in this embodiment, the movable driving part, in the standby position in the region of the axis of rotation of the driving body, or at most arranged directly in the connecting axis of the two devices for the operation of the safety gear.

In one embodiment variant, the electromagnet is integrated in an electromechanical delivery device. This electromechanical feed device is arranged, for example, in the region of the axis of rotation, preferably directly in the connecting axis, of the driving body.

The connection axis consists in each case of a connection element, which are assigned to the respective first and second device for the actuation of the safety gear and a connecting element, preferably a connecting tube, which connects the two connection elements. The length of the connecting element is tuned to a width of the driving body, or a distance of the two devices for the operation of the safety gear. The electromechanical delivery device is now integrated, for example, in or in the areas of the connection element. Thus, each own delivery device per device for the operation of the safety gear is provided, but which is able - as explained above - take along the connection axis in case of need, the second device for the operation of the safety gear.

The delivery device consists in one example of the electromagnet which is arranged in the form of a lifting magnet in the axial direction of the connecting element and which holds an anchor pin in normal operation against a force of an armature spring. The anchor pin is provided with a conical or wedge-shaped pressure tip. As soon as the electromagnet is deenergized, the armature spring pushes away the anchor pin and a guide pin is pushed away via the wedge slope or the conical pressure peak. This guide pin is part of the movable driving part of the driving body, or he is connected to this. In normal operation, this guide pin is held with a guide spring in the standby position, ie distanced from the elevator shaft or the guide or brake rail and de-energized state of the electromagnet, the anchor pin presses on the wedge slope of the guide pin together with the movable driving part against the elevator shaft, or the guide or brake track.

Of course, the working positions may be monitored by switches to check a correct response of the device for the operation of the safety gear.

This aforementioned form of delivery device allows a space-saving design and a holding force of the electromagnet can be chosen small. In addition, the arrangement of the feed device in the connection axis is advantageous because an axis of the connecting axis during pivoting of the driving body undergoes no shift and the electromagnet is within the connection axis at the same time from dust, dirt and any metal abrasion, such as rust dust, protected.

In an embodiment variant, the device for operating the safety gear further includes a counter-pressure roller, which is arranged on a driving body opposite surface of the elevator shaft, or the guide or brake rail and which the position of the device for the operation of the safety gear with respect to the elevator shaft, or to the guide or brake rail guaranteed. The device for the operation of the safety gear is advantageously installed in the housing of the device for the operation of the safety gear. This housing can be used on the one hand for attachment to the drive body and on the other hand it allows the attachment of the safety gear. With the arranged in the housing counter-pressure roller, the surface of the elevator shaft, or the guide or brake rail on which relieves the device for the operation of the safety gear is relieved. In addition, in a development of the solution in this counter-pressure roller, a speed sensor can be installed which measures a travel speed of the elevator and which automatically controls the device for actuating the safety gear when a critical travel speed is exceeded and thus actuates the safety gear. In addition, the second device for the operation of the safety gear can be equipped with a counter pressure roller with speed sensor. In this way a redundant speed monitoring can be realized.

In one embodiment variant, the device for actuating the safety gear is activated when the vehicle is stopped. This means that the electromagnet or an equivalent actuation at a stop in a floor releases the driving body, whereby it is pressed against the elevator shaft, or the guide or brake rail. As long as the drive moves in a free pivoting range of the device for the operation of the safety gear, the safety gear is not yet actuated and the means for the operation of the safety gear can be reset by switching the electromagnet back to the ready position. However, if the driving body moves away from the floor over a greater amount, or drifts away in an uncontrolled manner, the driving body, which in fact bears against the elevator shaft or on the guide rail or brake rail, actuates the safety gear. This is a good protection against unintentional slipping of the vehicle body is reached.

In one embodiment variant of an elevator installation, the drive body, or in the first instance the elevator car, contains an electronic safety device, or is connected to it. The electronic safety device can detect a deviation of the driving speed from a desired speed and, if necessary, control the device for the actuation of the safety gear and thus the Operate the safety catch.

Alternatively or additionally, the drive body, or primarily the elevator car, includes a monitoring device or is connected to it. The monitoring device is activated, for example, at a standstill of the elevator car and it can detect any unexpected drifting away the elevator car from a standstill and they can control the device for the operation of the safety gear in case of need and thus also operate the safety gear.

In a refinement variant of an elevator installation, a further drive body, for example a counterweight, contains a further device for actuating the safety gear as previously described. In one embodiment, this further drive body preferably includes a speed sensor, which is installed in the counter-pressure roller, as stated above, and it includes a power supply with energy storage, which is generated for example by means of revolving roller generator. This device can then make a backup of this further driving body, without further electrical connections are necessary. A status signal can be transmitted via a wireless connection. Alternatively, of course, a suspension or balancing cable between the cars, usually between the car and the counterweight, can be used to transmit the required signals and energy. In this case, if necessary, of course, the speed, and the safety information processed in one of the cars and then transferred to the other drive body.

In an advantageous embodiment of the elevator installation, the catching device is an eccentric catching device. Such Exzenterfangvorrichtung is for example from the disclosure DE2139056 known. The device for the operation of the safety gear can be connected by means of the connecting rod to the eccentric Exzenterfangvorrichtung and thus a direct operation of such a safety gear is guaranteed. Of course, required dimensions of the device for the operation of the safety gear must be adapted to the requirements of the safety gear. If the safety gear is designed for actuation in both traversing directions, the device for actuating the safety gear can, if required, also be geared to a double-sided actuation.

In one embodiment variant, the device for the actuation of the safety gear is supplied via an energy storage with electrical energy. This is, for example, a rechargeable battery. The energy storage prevents, for example, an undesired operation of the device for the operation of the safety gear in case of power failure in the building. Thus, the drive body can be stopped first by proper braking measures. Of course, this energy storage, if necessary, provide other functional groups with emergency power.

In a configuration variant, a pair of safety gears with associated means for operating the safety gear are arranged on the car. The means for operating the safety gear are connected to each other by means of the connecting shaft and both means for the operation of the safety gear are provided with an electromechanical feed device. The devices for the operation of the safety gear, or the electromechanical feed devices are controlled by the safety device. For example, the safety device controls the electromagnets of the electromechanical feed device directly or via corresponding brake control devices. The electromagnets are preferably, as previously described, connected in series.

The safety device may be, for example, a speed monitoring device, as shown in the WO03004397 It may include own speed sensors or systems for determining speed, or it may be a monitor which evaluates a speed of rollers rolling on the cab along the guide rails, or it may be a safety supervisory system as shown in FIG EP1602610 is presented. The safety device is advantageously equipped with electrical energy storage, such as batteries, batteries, capacitor bank. With the help of this energy storage, the safety device is kept active for a predetermined amount of time during a power failure in the building. If required, these energy stores can be combined for different functional groups. Of course, instead of a pair of safety gears, a plurality of pairs of safety gears with respective associated devices for the operation of the safety gear to the cabin can be grown.

In another configuration variant, the counterweight is equipped with safety gear, which are operated only in case of a missing suspension force, by means of a slack rope monitoring, or slack rope release. In this case, the catching device is actuated on the counterweight only in the case of a suspension of the suspension force on the counterweight, which is the case, for example, in the event of a suspension element failure. In order to prevent an accidental response, for example due to rope vibrations, the slack rope monitoring is provided with a damping element, such as a pneumatic damper. An advantage of such a control of the safety gear is that no electrical connection of the counterweight to the elevator system is required and still the counterweight is effectively secured against falling. A possible false triggering of the safety gear on the counterweight can be monitored on the cabin or on the drive, since a response of this safety gear results in a sudden strong load change in the drive or in the suspension element.

In the following, the inventive concept will be explained with reference to an example in connection with the figures.

Fig. 1

eine schematische Ansicht einer Aufzugsanlage in der Seitenansicht,

Fig. 2

eine schematische Ansicht der Aufzugsanlage im Querschnitt,

Fig. 3

eine schematische Darstellung eines Gesamtsystem,

Fig. 4

eine Einrichtung für die Betätigung der Fangvorrichtung zusammen mit einer angebauten Fangvorrichtung in einer Bereitschaftsstellung,

Fig. 5

eine perspektivische Ansicht der Einrichtung von Fig. 4,

Fig. 6

die Einrichtung von Fig. 4 in einer ersten Betätigungsstellung,

Fig. 7

die Einrichtung von Fig. 4 in einer zweiten Betätigungsstellung,

Fig. 8

die Einrichtung von Fig. 4 in einer Bremsstellung,

Fig. 9a

eine elektromechanische Zustelleinrichtung in einer Bereitschaftsstellung,

Fig. 9b

die elektromechanische Zustelleinrichtung von Fig. 9a in einer ersten Betätigungsstellung,

Fig. 10

eine Schaltungsanordnung zur Schaltung der Einrichtung für die Betätigung der Fangvorrichtung

Fig. 11

eine schematische Ansicht einer Aufzugsanlage mit einer Fangvorrichtung am Gegengewicht.

Show it:

Fig. 1

a schematic view of an elevator system in the side view,

Fig. 2

a schematic view of the elevator installation in cross section,

Fig. 3

a schematic representation of an overall system,

Fig. 4

a device for actuating the safety gear together with an attached safety gear in a ready position,

Fig. 5

a perspective view of the device of Fig. 4 .

Fig. 6

the establishment of Fig. 4 in a first operating position,

Fig. 7

the establishment of Fig. 4 in a second operating position,

Fig. 8

the establishment of Fig. 4 in a braking position,

Fig. 9a

an electromechanical delivery device in a ready position,

Fig. 9b

the electromechanical delivery device of Fig. 9a in a first operating position,

Fig. 10

a circuit arrangement for switching the device for the operation of the safety gear

Fig. 11

a schematic view of an elevator system with a safety gear on the counterweight.

In the figures, the same reference numerals are used across the figures for equivalent parts.

Fig. 1 shows an elevator system 1 in an overall view. The elevator installation 1 is installed in an elevator shaft 2 of a building and serves for the transport of persons or goods within the building. The elevator installation includes an elevator car 3, which can move up and down along guide rails 9. The elevator car 3 is guided by guide shoes 10 along the guide rails 9. The elevator car 3 is accessible from the building via doors. A drive 6 is used to drive and hold the elevator car 3. The drive 6 is usually located in the upper area of the building and the elevator car 3 is suspended with support means 5, such as suspension ropes or carrying strap on the drive 6. The support means 5 are on the drive 6 further led to a counterweight 4. The counterweight compensates for a mass fraction of the elevator car 3, so that the drive 6 to compensate for the main thing, only an imbalance between the elevator car 3 and counterweight 4, or drive and hold must. Also, the counterweight 4 is guided along guide rails 9 by means of guide shoes 10. The guide shoes 10 for the elevator car 3 and the counterweight 4 are selected as a rule according to expected executives. It come here so-called sliding guides or roller guides in question. The drive 6 is arranged in the example in the upper part of the elevator shaft 2. Of course, it can also be arranged at another location in the building, or in the area of the car 2 or the counterweight 3.

The elevator installation 1 is, as also in Fig. 3 can be controlled by an elevator control 7. This elevator control 7 controls the main thing to the drive 6 and it also includes security elements, which monitors movements of the elevator car in coordination with the environment - eg closing state of the doors. The elevator control 7 is connected via a hanging cable 8 to the elevator car 3. About the hanging cable 8 electrical energy, and control signals is transmitted. Of course, instead of a suspension cable, wireless systems, for example with radio transmission of signals and current paths with grinding devices, can also be used for a transmission of energy.

The elevator car 3 is equipped with a safety gear 11 which is suitable for securing and / or decelerating the elevator car 3 in the event of unexpected movement, overspeeding or stopping. The safety gear 11 is arranged below the elevator car 3 in the example. The safety gear 11 is electrically controlled and it is connected to a device for the actuation of the safety gear 18. To control this device for the operation of the safety gear 18, a safety device 41 and optionally a monitoring device 42 is present. The safety device 41 is connected to sensors. Such a sensor is for example a speed sensor 40. The speed sensor 40 may be a tachogenerator or an incremental encoder, which are integrated, for example, in one or more guide rollers or in deflection rollers. It can also be used position sensor or acceleration sensors, from which an actual vehicle speed can be calculated. The safety device 41 determines the safety state of the elevator installation from these signals and correspondingly controls the device for actuating the safety device 18. In the area of the safety device 41, preferably also an energy store 46, for example a rechargeable battery in the form of supercapacities, is arranged. A mechanical speed limiter, as it is commonly used, can be omitted in this elevator installation.

The monitoring device 42 monitors, for example, the elevator car at a standstill when the elevator car is for the purpose of unloading or loading in a floor.

Fig. 2 shows the elevator system of Fig. 1 in a schematic plan view. The car 3 and the counterweight 4 are each guided in the example with a pair of guide rails 9 and the elevator car includes a pair of safety gears 11, wherein a first safety gear 11.1 acts on one of the guide rails 9 and a second safety gear 11.2 acts on the other of the guide rails 9.

Of course, each of the safety gear 11.1, 11.2 has an associated device for the operation of the safety gear 18.1, 18.2.

The two devices for the operation of the safety gear 18, 18.1, 18.2 and the corresponding to be controlled safety gears 11, 11.1, 11.2 are functional identically constructed. They differ at most by a mirror image structure. In the following explanation of the device for the operation of the safety gear is only spoken of one of the means for the actuation of the safety gear 18, although thus always the left and right side device for the operation of the safety gear 18.1, 18.2 is included. This device for the operation of the safety gear is in the example according to the Fig. 4 to 8 advantageously assembled directly with the safety gear 11. The safety gear 11 used in the example is a known eccentric safety gear. It includes a brake shoe 15 which is delivered by an eccentric 14 in case of need to the braking surface of the guide rail 9. The eccentric is moved by a connecting rod 17 or rotated. A counterforce is then built up via a counter brake pad 16. The device for actuating the safety gear 18 is arranged above the safety gear 11 and can actuate the safety gear via the connecting rod. The device for the operation of the safety gear 18 is advantageously installed in a separate housing 19. A built in the housing 19 counter-pressure roller 37 leads the housing 19 and thus the means for the operation of the safety gear 18 in exact position of the guide rail 9 along. The counter-pressure roller 37 is designed to be resilient generally. Alternatively, it may directly include the speed sensor 40 (not shown in these figures). In the device for the actuation of the safety gear 18 is the driving body 20. The driving body 20 is pivotally mounted with respect to a rotational axis 22. As in Fig. 5 can be seen, the axis of rotation 22 via a connecting axis 23 to the opposite means for the operation of the safety gear 18.1, 18.2 (see Fig. 3 . 11 ), so that the two devices for the operation of the safety gear 18.1, 18.2 move synchronously with each other. The axis of rotation 22, or the driving body 20 is by a pawl or spring mechanism in the in Fig. 4 held ready position shown. In this standby position, an air gap is present between the driving body 20, or a driving surface 21 of the driving body 20, and the guide rail 9. Thus, the elevator car to which this device is grown for the operation of the safety gear 18 is moved without hindrance. According to the ready position of the device for the operation of the safety gear 18, the safety gear 11 is in its standby position, ie brake shoe 15, eccentric 14 and counter brake pad 16 have an air gap to the guide rail 9.

Also on the axis of rotation 22, a control arm 27 is mounted. The control arm 27 is movable relative to the driving body 20. When using a safety device which can be actuated on both sides, as shown in the example, it is held in a normal position-in the example, horizontally. This holder can be designed for example by means of a ball grid, magnetic or by means of springs. On the driving body 20 driver 28 are arranged. Upon rotation of the driving body 20 of the control arm 27 is held in the normal position until the driver 28, the control arm 27 entrains (see Fig. 7 ) and thus the rotation axis 22 rotates.

The driving surface 21 of the driving body 20 is designed with respect to the rotation axis 22 such that a distance of the driving surface 21 to the rotation axis 22 in response to a rotation angle, which results upon rotation of the driving body 20, increases. The driving body 20 is designed in two parts in the example. It includes a fixed driving part 20.1 which forms the main body of the driving body 20. The fixed driving part 20.1 includes the driver 28, which entrains the control arm 27 with sufficient rotation. In the fixed driving part 20.1 a movable driving part 20.2 is embedded. The movable driving part 20.2 is in the standby position, as in the Fig. 4 and 5 represented, held retracted in the fixed driving part 20.1. An associated feed device 43 is in the Fig. 9a and 9b explained.

If now the device for the actuation of the safety gear 18, for example by the safety device 41 or the monitoring device 42 (FIG. Fig. 1 . 3 or 11 ) is triggered, the movable driving part 20.2, as in Fig. 6 , delivered to the guide rail 9. If the driving body, or the device for the operation of the safety gear 18 in relation to the guide rail 9 is at rest, the safety gear 11 itself remains unactuated. The movable driving part 20.2 itself could therefore be withdrawn again in the ready position. This is helpful, for example, when using the device for operating the safety gear to secure the elevator car in a stop or even with a prolonged interruption of energy. Although an energy storage can hold the movable driving part 20.2 for a predefined time in the standby position, however, the movable driving part 20.2 can be delivered to the guide rail 9 for energy-saving or other reasons. When the elevator installation is switched on again, only the movable entrainment part can be moved back into the ready position and the installation is again ready for operation. In particular, of course, can Energy saving purposes even with a shorter stop in a floor or in a floor - if, for example, no move command is pending - the movable driving part 20.2 be delivered to the guide rail 9. As soon as a move command is pending, the movable entrainment member can easily be moved back to the ready position.

But if the drive body, or the device for the operation of the safety gear 18, as in the Fig. 7 shown moved in relation to the guide rail 9, the driving body 20 is rotated by the determined by the movable driving part 20.2 and the fixed driving part 20.1 driving surface 21 on the axis of rotation 22. However, the control arm 27 remains provisional, as long as the driver 28 of the freewheel device 26 has not reached the control arm 27, in its rest position. The safety gear 11 itself remains unconfirmed. Since only the driving body 20 has to be moved via this movement, a contact pressure can be kept relatively small. About a waveform of the driving surface 21, this contact force can be slowly increased, so that after passing through the freewheel of the freewheel device 26 is a sufficient pressing and thus driving force for the operation of the safety gear 11 is available.

If now the driving body, or the device for the operation of the safety gear 18, as in the Fig. 8 shown, still moving in relation to the guide rail 9, the driving body 20, by the determined by the movable driving part 20.2 and the fixed driving part 20.1 certain driving surface 21 on the rotation axis 22, further rotated. The driver 28 of the freewheel device 26 now takes the control arm 27 and thus actuates via the connecting rod 17, the safety gear 11, or rotates the eccentric 14 in frictional contact with the guide rail 9 and thereby causes a structure of a braking force on the brake shoe 15 and the counter-brake pad sixteenth The driving body of the elevator system, or the elevator car can be safely shut down.

Of course, by means of the connecting rod 17 and a possible arrangement of levers or joints and safety gears with catch wedges or fishing wheels can be used or operated. In such safety gear then a wedge or a roller would be raised accordingly instead of the eccentric.

As in Fig. 5 mentioned the feed device 43 is executed in the example as part of the connection axis 23. In the Fig. 9a and 9b The function of this feed device 43 is now explained in particular. The figures show a horizontal section through the connection axis 23, which contains such a feed device 43 in the end region, advantageously in both end regions. In Fig. 9a is between the braking surface of the guide rail 9 and the driving body 20, an air gap. This corresponds to the ready position of the device for operating the safety gear as in Fig. 4 explained and illustrated. The fixed driving part 20.1 is arranged on the connecting element 23.1 of the connecting shaft 23. In this fixed driving part 20.1 of the movable driving part 20.2 is held by a guide pin 35. A guide spring 36, preferably a compression spring as shown, pushes the movable driving part 20.2 away from the guide rail via the guide pin 35, or pulls it into the fixed driving part 20.1. In the center of the connecting element 23.1 of the connecting shaft 23, an electromagnet 29 is arranged, which can attract an anchor pin 32. The armature pin 32 is, in the de-energized state of the electromagnet 29, pressed by an armature spring 34 in a working position and, in energized state of the electromagnet 29, held against the armature spring 34, in the standby position. Will now the anchor pin 32, as in the Fig. 9b shown, pressed by the armature spring 34 in the working position, presses a pen tip 33 on the conical configuration of the guide pin 35 and thus the movable driving part 20.2 against the guide rail 9. The armature spring 34 acts as a pressure spring 24 which the movable driving part 20.2 against the guide rail suppressed. Thus, the pressing force is built up against the guide rail 9 and the driving body 20 can be rotated or operated as previously described.

By switching on and off of the electromagnet 29 so the movable driving part 20.2 of the driving body 20 can be switched between standby position and working position, or moved. In the example, the energized state of the electromagnet 29 corresponds to the ready position. Since in the first step of the operation of the safety gear 11 only the driving body 20 must be moved, an associated pressing force can be chosen small. This means that a correspondingly small electromagnet can be selected, with which also an energy consumption can be kept small.

Of course, the principle of action can in principle also be used vice versa, by an energized electromagnet presses the movable driving part 20.2 and the armature spring holds the driving part in the ready position. This requires less energy and requires a power supply that is always available.

Once the driving body 20 on the connecting axis 23, and the connecting element 23.1 of the connecting shaft 23 according to the freewheel of the freewheel device 26 (see Fig. 4 to 8 ) is pivoted, the control arm 27 is rotated with the connection axis 23, whereby an inevitably synchronous operation of the connected by the connecting axis 23 means for the operation of the safety gear 18, and the associated safety gears 11 takes place.

Since a feed device 43 is advantageously installed in both end regions of the connecting shaft 23, both safety devices can still be actuated synchronously even if one of the feed devices 43 fails. Advantageously, as in the Fig. 10 schematically illustrated the two electromagnets 29 of the two feed devices 43 connected in series with the safety device 41. Thus, for example, in the case of a defect in a wire winding of the electromagnet, the series-connected second electromagnet is also interrupted directly.

Of course, the delivery device, or a working position of the device for the operation of the safety gear can be monitored by means of electrical switches or sensors. These switches or sensors are not shown in the figures, they are arranged by the skilled person as needed.

In Fig. 11 is now one of the Fig. 1 or 3 complementary or alternative embodiment of the safety concept of an elevator system 1 shown. Here, the elevator car 3 with safety gear 11 and associated facilities for the operation of the safety gear 18 with corresponding control devices such as safety device 41 and / or monitoring device 42, equipped with speed sensors 40 and any energy storage 46, as described previously. The counterweight 4 is equipped in this example with a substantially known safety gear 11g, which is actuated by a slack rope release 38. This means that the safety gear 11g is operated when a suspension force is below a preset value for a predetermined period of time sinks. If, for example, the suspension elements 5 in the elevator installation are broken, the safety gear 11 of the elevator car 3 would be actuated via the corresponding control devices and the elevator car 3 would be safely braked. Because of the now suddenly missing load capacity in the support means now the slack rope release 38 would operate the safety gear 11g of the counterweight and secure the counterweight 4 from falling. By means of a response delay, or damping device 39 in the slack rope release 38, it is achieved that no triggering of the safety gear 11g takes place during a brief oscillation process.

Of course, the counterweight 4 with a device for the operation of the safety gear 18, as described in the preceding descriptions be provided, in which case the control of the same can be done by their own control devices or by control and power connections via suspension and compensating cable or the like.

The illustrated arrangements can be adapted by the skilled person to the elevator installation. The brakes can be mounted above or below the cab 3. It can also be used on a car 3 more Bremspaare. Of course, the braking device can also be used in an elevator installation with several cabins, in which case each of the cabins has at least one such braking device. If necessary, the braking device can also be mounted on the counterweight 4 or it can be mounted on a self-propelled cab.

Claims (15)

1. Lift installation with at least one travel body (3, 4), which is arranged to be movable along a guide rail (9) in a lift shaft (2), comprising:

   a safety brake device (11, 11.1, 11.2, 11 g), which is arranged at the travel body (3, 4) and which is provided for braking and fixing the travel body (3, 4) at the guide rail (9) or at a brake rail when required, and

   equipment (18, 18.1, 18.2), which is arranged at the travel body (3, 4) and which is connected with the safety brake device (11, 11.1, 11.2, 11g), for actuation of the safety brake device, wherein the equipment for actuation of the safety brake device comprises at least one entraining body (20) which when required can be pressed against the lift shaft, preferably against the guide rail or brake rail (9), wherein the actuation of the safety brake device takes place by relative movement between the pressed entraining body (20) and the safety brake device,

   characterised in that the entraining body (20) includes a preferably curved entraining surface (21) arranged in the equipment (18, 18.1, 18.2) for actuation of the safety brake device so as to be pivotable about an axis (22) of rotation.
2. Lift installation according to claim 1, wherein the preferably curved entraining surface (21) is such that a pressing force of the entraining body (20) against the lift shaft or against the guide rail or brake rail (9) increases over a pivot range of the entraining body (20).
3. Lift installation according to one of claims 1 and 2, wherein the travel body (3, 4) is arranged to be movable along at least two guide rails or brake rails (9) and at least two safety brake devices (11, 11.1, 11.2, 11 g) are so arranged at the travel body (3, 4) that a first safety brake device (11, 11.1) co-operates with a first guide rail or brake rail (9) and is actuable by first equipment for actuation of the safety brake device (18, 18.1) and wherein a second safety brake device (11, 11.2) co-operates with a second guide rail or brake rail (9) and is actuable by second equipment for actuation of the safety brake device (18, 18.2) and wherein in addition the axis (22) of rotation of the entraining body so couples together the two items of equipment for actuation of the safety brake device (18, 18.2, 18.2) that the two items of equipment for actuation of the safety brake device and thus the two safety brake devices are actuable substantially synchronously.
4. Lift installation according to claim 3, wherein each of the items of equipment for actuation of the safety brake device (18, 18.1, 18.2) is designed so that it is in a position by itself to actuate the safety brake devices coupled by way of the axis (22) of rotation of the entraining body (20).
5. Lift installation according to any one of claims 1 to 4, wherein the preferably curved entraining surface (21) of the entraining body (20) is connected with the safety brake device (11, 11.1, 11.2, 11g) by way of a freewheel device (26) so that the pressing force of the entraining body (20) against the lift shaft or against the guide rail or brake rail (9) is increased over a first range of the relative movement between the pressed entraining body (20) and the safety brake device (11, 11.1, 11.2, 11g) and the safety brake device is actuated over a second range of the relative movement.
6. Lift installation according to any one of claims 1 to 5, wherein the entraining body (20) can be pressed by means of a pressing spring (24, 34) against the lift shaft or against the guide rail or the brake rail (9) and can be held in a readiness setting by means of an electromagnet (29) and wherein the electromagnet (29) is supplied with energy preferably by way of an energy store (46).
7. Lift installation according to any one of the preceding claims 1 to 6, wherein the entraining body (20) includes a movable entraining part (20.2) and a fixed entraining part (20.1), wherein the movable entraining part (20.1) can be pressed by means of the pressing spring (24, 34) against the lift shaft or against the guide rail or brake rail (9) and the electromagnet (29) can hold the movable entraining part (20.2) in the readiness setting or the electromagnet (29) presses back the pressing spring (24, 34) in such a way that the movable entraining part (20.2) is not pressed against the lift shaft or against the guide rail or brake rail (9).
8. Lift installation according to any one of the preceding claims 1 to 7, wherein the equipment for actuation of the safety brake device (18, 18.1, 18.2) can actuate the safety brake device (11, 11.1, 11.2, 11 g), preferably an eccentric safety brake device, in one of the travel directions or wherein the equipment for actuation of the safety brake device (18, 18.1, 18.2) can actuate the safety brake device (11, 11.1, 11.2, 11g), preferably an eccentric safety brake device, in both travel directions.
9. Lift installation according to any one of the preceding claims 1 to 8, wherein the equipment for actuation of the safety brake device (18, 18.1, 18.2) further includes a counter-pressure roller (37), which is arranged on a surface of the lift shaft or of the guide rail or brake rail (9) opposite the entraining body (20) and which guarantees the position of the equipment for actuation of the safety brake device (18, 18.1, 18.2) with respect to the lift shaft or to the guide rail or brake rail (9).
10. Lift installation according to claim 9, wherein the counter-pressure roller (37) includes a speed measuring instrument (40) and a speed control device monitors travel speed with use of the speed measuring instrument (40) and can activate, when a limit speed is exceeded, the equipment for actuation of the safety brake device (18, 18.1, 18.2).
11. Lift installation according to any one of the preceding claims 1 to 10, wherein the equipment for actuation of the safety brake device (18, 18.1, 18.2) can be activated at a stop of the travel body (3, 4) and the equipment for actuation of the safety brake device (18, 18.1, 18.2) can actuate the safety brake device (11, 11.1, 11.2, 11g) in the case of uncontrolled drifting of the travel body (93, 4) away from the stop.
12. Lift installation according to any one of the preceding claims 1 to 11, wherein the travel body 93, 4) is a lift cage (3) and the equipment for actuation of the safety brake device (18, 18.1, 18.2) is connected with an electronic safety device (41) which can ascertain departure of the travel speed from a target speed and which when an impermissible departure is ascertained can activate the equipment for actuation of the safety brake device (18, 18.1, 18.2) and/or wherein the travel body (3, 4) is a lift cage (3) and the equipment (18, 18.1, 18.2) for actuation of the safety brake device is connected with a monitoring device, which is activated at standstill of the lift cage (3) so as to ascertain possible unexpected drifting of the lift cage (3) away from standstill and which when unexpected drifting away is ascertained can activate the equipment for actuation of the safety brake device (18, 18.1, 18.2) and/or wherein a further travel body (3, 4) or the travel body (3, 4) is a counterweight (4) and the equipment for actuation of the safety brake device (18, 18.1, 18.2) includes a speed control device according to claim 10, or the equipment for actuation of the safety brake device (18, 18.1, 18.2) is activated by way of a signal line of a suspension cable or compensating cable (8) or the equipment for actuation of the safety brake device (18, 18.1, 18.2) is activated by way of a wire-free connection.
13. Lift installation according to any one of the preceding claims 1 to 11, wherein the travel body (3, 4) is a lift cage (3) and the equipment for actuation of the safety brake device (18, 18.1, 18.2) is connected with an electronic safety device (41) which ascertains departure of the travel speed from a target speed and can activate the equipment for actuation of the safety brake device (18, 18.1, 18.2) if an impermissible departure is ascertained and/or wherein the travel body (3, 4) is a lift cage and the equipment for actuation of the safety brake device (18, 18.1, 18.2) is connected with a monitoring device (42) which is activated at standstill of the lift cage so as to ascertain possible unexpected drifting of the lift cage (3) away from standstill and which when unexpected drifting away is ascertained can activate the equipment for actuation of the safety brake device (18, 18.1, 18.2) and wherein a further travel body (3, 4) or the travel body is a counterweight (4) and this counterweight (4) includes a safety brake device (11, 11g) and slack cable triggering means (38) for actuation of the safety brake device.
14. Lift installation according to claim 13, wherein the slack cable triggering means (38) is realised with a response delay (39).
15. Method of actuating a safety brake device (11, 11.1, 11.2, 11 g) in a lift installation by means of equipment for actuation of the safety brake device (18, 18.1, 18.2), wherein the equipment for actuation of the safety brake device includes at least one entraining body (20) with a curved entraining surface (21), the entraining body (20) is arranged in the equipment for actuation of the safety brake device (18, 18.1, 18.2) so as to be pivotable about an axis (22) of rotation and the entraining body (20) when required can be pressed against the lift shaft, preferably against the guide rail or brake rail (a) and the actuation of the safety brake device takes place by relative movement between the pressed entraining body (20) and the safety brake device (11, 11,1, 11,2, 11g), wherein the method comprises the steps of:

    - pressing of the entraining body (20) against the lift shaft, preferably against the guide rail or brake rail,

    - pivotation of the entraining body (20) about the rotational axis (22),and

    - actuation of the safety brake device (11, 11.1, 11.2, 11 g) by the relative movement between the pressed entraining body (20) and the safety brake device (11, 11.1, 11.2, 11g).

Images