EP2931641B1 - Catch device for a lift system - Google Patents

Catch device for a lift system Download PDF

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Publication number
EP2931641B1
EP2931641B1 EP13799596.5A EP13799596A EP2931641B1 EP 2931641 B1 EP2931641 B1 EP 2931641B1 EP 13799596 A EP13799596 A EP 13799596A EP 2931641 B1 EP2931641 B1 EP 2931641B1
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EP
European Patent Office
Prior art keywords
brake
eccentric
safety
bearing axle
web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP13799596.5A
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German (de)
French (fr)
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EP2931641A1 (en
Inventor
Josef Husmann
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Inventio AG
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Inventio AG
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Priority to EP13799596.5A priority Critical patent/EP2931641B1/en
Publication of EP2931641A1 publication Critical patent/EP2931641A1/en
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Publication of EP2931641B1 publication Critical patent/EP2931641B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/20—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of rotatable eccentrically-mounted members

Definitions

  • the invention relates to a safety gear for braking an elevator car and an elevator installation with such a safety gear.
  • the elevator system is installed in a building. It consists essentially of a cabin, which is connected via suspension means with a counterweight or with a second car. By means of a drive, which acts either on the suspension means, directly on the cabin or on the counterweight, the cabin is moved along, substantially vertical, guide rails.
  • the lift system is used to move people and goods within the building over single or multiple floors.
  • Such elevator systems include devices to secure the elevator car in the event of failure of the drive or the support means or at best to protect even in a stop in a floor from unwanted drifting away.
  • safety devices are used as a rule, which can slow down the elevator car on the guide rails in case of need.
  • catching devices are preferred which can be controlled by an electronic monitoring system.
  • a braking device which can be controlled electromagnetically.
  • the brake shoe After delivery of a brake shoe to a brake bridge and moving elevator car, the brake shoe is rotated and longitudinally displaced. As a result, the brake shoe can build up a braking force and brake the cab.
  • the solution presented below aims to provide an alternative braking device or safety gear, which is also suitable for attachment to an elevator car, and which can cause braking of the elevator car.
  • the safety gear should be easy to operate and it should be easy to reset.
  • a proposed safety gear consists of a brake housing which is shaped to receive substantial parts of the safety gear.
  • the brake housing does not have to enclose these parts.
  • the brake housing may also be a base plate on which the essential parts are arranged.
  • This brake housing is designed to accommodate significant tension and braking forces.
  • the brake housing includes connections for attaching the safety gear to an elevator car.
  • the safety gear is suitable for braking or holding the elevator car on a brake bridge. This is on or in the brake housing a Bremsexzenter arranged with a cylindrical bearing bore.
  • This brake eccentric is received by a bearing axis, wherein this bearing axis is arranged pivotably or displaceably in the brake housing.
  • the brake eccentric arranged on the bearing axis is spaced apart from the brake bridge in a first position, and it can be brought into contact with the brake bridge in a second position.
  • the brake eccentric can on the one hand be kept in a neutral, non-braking position, spaced from the brake bridge, and on the other hand, in the case of a required braking, can be brought into contact with the brake bridge.
  • the brake housing preferably has an opening through which the bearing axle projects, and a first device moves or pulls the brake eccentric together with the bearing axle into the first position.
  • This first position is determined, for example, by an end stop of the opening.
  • a rigid stop which is carried out for example by a breakthrough in the form of a slot is sufficient.
  • the slot can preferably take over a leadership of the bearing axis. This is advantageous because the breakthrough can absorb significant forces that arise during braking.
  • the bearing axis is pivotally mounted in the brake housing about a vertical axis.
  • the bearing axis is mounted in a rear part of the brake housing about the vertical axis.
  • the first means for moving the brake eccentric to the first position is a spring or spring mechanism which pulls the brake eccentric into the first position defined by the end stop of the aperture.
  • the spring on the one hand, retracts the brake eccentric, provided that it is not clamped or actuated, into the first position, and, on the other hand, influences an actuating force for advancing the brake eccentric to the brake bridge in a precisely defined, calculable order of magnitude.
  • the spring, or the spring mechanism is elastic. Thus, for example, in an accidental strip of the brake eccentric on the brake bridge this is not engaged, but it is a relevant definable contact pressure required to rotate the brake eccentric. Accidental operation of the safety gear is thus prevented.
  • the brake bridge is a component of a guide rail and the safety device interacts with this brake bridge for the purpose of braking the elevator cage.
  • the catching device preferably further comprises a brake member, which is arranged opposite to the brake eccentric in or on the brake housing, so that the braking web of the guide rail in If necessary, between the brake eccentric and the brake member can be clamped.
  • the brake eccentric when brought from the second device in contact with the brake bridge, rotated by a relative movement between the brake bridge and safety gear so that it is pushed back into the first position.
  • the shape of the Bremsexzenters is designed so that a distance from the outer contour to the center of the cylindrical bearing bore in the direction of rotation increases steadily.
  • the brake eccentric is first pushed back until it in turn is present at the end stop of the breakthrough. Thereafter, or substantially simultaneously, the bearing axis is moved together with the brake housing by further rotation of the brake eccentric, so that the braking member finally also touches the brake bridge and clamped.
  • the brake housing is preferably elastic, for example on sliding rods, laterally displaceably mounted. The sliding rods can thereby transmit a braking force, for example to the elevator car.
  • the end stop of the opening preferably a slot, takes over and transmits thereby caused by the brake eccentric contact pressure and transmits it into the brake housing.
  • the brake eccentric when using a pivotable bearing axis, the brake eccentric is tilted only when pressed against the brake bridge within the required pivoting, and that the brake eccentric when pushing back to the end stop in turn reaches a flat plane to the brake work position.
  • the brake eccentric and the bearing axis is ideal load.
  • the bearing axis is fixedly connected to an actuating lever.
  • the actuating lever is screwed, for example, with the bearing axis, welded or connected by bolts.
  • the connection is such that the bearing axis can be pivoted by the actuating lever about the vertical axis.
  • the brake eccentric can be brought by the actuating lever in contact with the brake bridge.
  • a delivery force is such that on the one hand a retraction force of the first device can be safely overcome and in addition there is an excess of force sufficient to press the brake eccentric so strong on the brake bridge, that it can be securely rotated by the relative movement between the brake bridge and safety gear.
  • Such a delivery force is for example of the order of 150 to 700 Newton, preferably 500 to 600 Newton. With this delivery force can be twisted securely, usually provided with a Randr réelle or grooving Bremsexzenter.
  • the actuating lever can preferably be provided by an actuator, as is known, for example, from the document WO 2011/113753 is known to be pivoted, so that the actuating lever can bring the brake eccentric in contact with the brake bridge.
  • a retaining plate is used to secure the brake eccentric on the bearing axis.
  • the bearing axis is provided with a stop collar, possibly with a corresponding thrust washer, by means of which a position of the brake eccentric on the bearing axis is determined.
  • the bearing axis can be pivotally mounted in a rear part of the brake housing.
  • the operating lever can be fixed to the bearing axis before, after or together with the bearing axis.
  • the brake eccentric possibly with an integrated bearing slide bush, placed on the bearing axis and secured by means of the retaining washer on the bearing axis.
  • the retaining plate covers the bearing bore and it is preferably fastened with a pair of screws on the bearing axis.
  • the spring mechanism of the first means for pulling the Bremsexzenters in the first position comprises a pull lever, a rocker arm and at least one spring.
  • the pull lever and the rocker arm are hinged together, wherein the pull lever is connected to the brake eccentric and the rocker arm is pivotally mounted in the brake housing.
  • the attachment of the pull lever on the brake eccentric is designed so that a, upon pivoting of the bearing axis resulting, skew of the brake eccentric can be added.
  • the spring continues to act on the rocker arm such that it pulls the brake eccentric into the first position via the pull lever.
  • an increase in force of the retracting force can be idealized and further, the rocker arm can easily operate a switch when it reaches a braking position of the brake eccentric corresponding tilt position.
  • a controller can thus, for example, operate a second safety gear also when a first safety gear accidentally caught in Fang. This prevents unilateral catching.
  • the spring mechanism further includes a grid position, which secures the brake eccentric in the first position against unintentional pivoting.
  • the grid position may be a ball catch or the like. This prevents a swinging of the brake eccentric.
  • FIG. 1 shows an elevator system 1 in an overall view.
  • the elevator installation 1 is installed in a building and serves to transport persons or goods within the building.
  • the elevator installation includes an elevator car 2, which can move up and down along guide rails 6.
  • the elevator car 2 is accessible from the building via doors.
  • a drive 5 serves to drive and hold the elevator car 2.
  • the drive 5 is arranged in the upper area of the building and the car 2 is suspended by means of support means 4, for example carrying ropes or carrying straps, on the drive 5.
  • the suspension means 4 are further accessible via the drive 5 a counterweight 3 led.
  • the counterweight compensates for a mass fraction of the elevator car 2, so that the drive 5 has to compensate for the main thing only an imbalance between the car 2 and counterweight 3.
  • the drive 5 is arranged in the example in the upper part of the building. It could of course also be arranged in the area of the car 2 or the counterweight 3.
  • the elevator car 2 is equipped with a safety gear 10 which is suitable for securing and / or decelerating the elevator car 2 in the event of unexpected movement, overspeeding or stopping.
  • the safety gear 10 is arranged below the car 2 in the example.
  • the elevator installation 2 further includes a safety controller 11, which in the example is arranged on the elevator car 2.
  • the safety controller 11 monitors movements of the elevator car 2 and activates the safety gear 10 if necessary.
  • the pair of safety gears 10 is operated in the example of a central actuator 8, which in turn is controlled by the safety controller 11.
  • the actuator 8 is connected by means of connecting rods 9, preferably tie rods to the safety gear 10.
  • the safety gear 10 is in the in the FIGS. 3 to 8 running example of a brake housing 17.
  • the brake housing is designed as a supporting structure. It is connected via at least one slide bar 34 and tilt stops to the elevator car 2.
  • the brake housing 17 is made for example as a casting, as a welded construction or from another machined structure. It is designed to receive required braking and pressure forces and to transfer to the elevator car 2.
  • the brake housing 17 is held, for example via a spring arrangement (not shown) on the slide bar 34 in a base position defined by a stop screw 17a.
  • the brake housing 17 can align laterally to the brake pad 7 a of the guide rail 7 upon actuation of the safety gear 10.
  • a bearing axle 18 is arranged in the brake housing 17. This is arranged pivotably about a vertical axis 27a in the brake housing 17.
  • a brake eccentric 15 is arranged via a sliding shell 26.
  • the brake eccentric 15 has for this purpose a cylindrical bearing bore 16 and the bearing shaft 18 includes, preferably, a collar on which the brake eccentric can strike.
  • the brake eccentric 15 further has, starting from a central region, a rising in both directions outer curve shape, which ends in a braking surface with a straight portion.
  • the brake housing 17 has, in the region between the brake eccentric 15 and the vertical axis 27 a, an opening 24, preferably a slot, through which the bearing axle 18 can protrude.
  • the opening 24 includes an end stop 24a on which the bearing axis 18 can be present and which is arranged so that the brake eccentric can be arranged substantially perpendicular to the brake bridge 7a, or a contact surface of the brake eccentric lies flat to the brake bridge.
  • the opening 24 is designed such that it allows a delivery of the brake eccentric 15 to the brake bridge 7a.
  • the delivery corresponds to at least a double amount of a game between the braking surfaces and the brake bridge.
  • the delivery is for example about 3 to 8 millimeters.
  • the opening 24 is shaped so that it leads the bearing axis 18 in the vertical direction, so that braking and pressing forces can be transmitted via the end stop 24a of the opening 25.
  • the brake eccentric 15 is secured with a retaining plate 29 on the bearing axis 18.
  • the holding plate 29 is screwed, for example, with an end face of the bearing axis.
  • the brake eccentric 15 could also be held with a clamping or securing ring.
  • the bearing axis 18 is provided with an actuating lever 27.
  • the operating lever 27 is on the bearing axis 18 with a bearing journal of the vertical axis 27a and a bolt 27c so connected that an introduced into the operating lever 27 actuating force 27 can pivot the Lagerachs 18 about the vertical axis 27.
  • the actuating lever 27 is, by means of a connection point 27b, connected to the connecting rod 9, preferably in the form of pull or push rods.
  • the connecting rods 9 are, as related to FIG. 2 explained, connected to an actuator 8.
  • the connecting rod 9 is provided with a length adjustment 9a, so that a desired position of the bearing axis 18 can be adjusted accurately.
  • one of the connections from the actuator 8 to the pivotable axle 18 is made with play or an elastic connection. This can be compensated for inaccuracies or forces that can occur, for example, when resetting.
  • the safety gear includes a brake member 23 which is arranged opposite to the brake eccentric 15 in the brake housing 17 so that the brake pad 7a can be arranged between the brake eccentric 15 and the brake member 23.
  • the brake member is supported in the brake housing 17 by means of compression springs 23a, preferably prestressed compression springs 23a.
  • the brake member 23 can be biased by means of spring pin 23b and adjusting nuts 23c, against the compression springs 23a.
  • the brake eccentric is further, by means of a first device 19, held in a first position, as in the FIGS. 3 and 4 is shown.
  • a pull lever 30 attached to the brake eccentric is connected to a rocker arm 31, which in turn is pivotally mounted in a retaining plate 19a fastened to the brake housing 17.
  • a position of the rocker arm 31 and thus a position of the brake eccentric 15 are monitored by a switch 32 by means of a switching cam 32a.
  • first position is the brake eccentric in its center position.
  • a grid position 33 for example in the form of a Kugelschnäppers, integrated. This provides an additional holding force which keeps the brake eccentric in the first position. A retaining force of the spring 21 can be selected correspondingly smaller.
  • the grid position can also be arranged, for example, in the case of the brake eccentric 15
  • the safety gear 10 is actuated.
  • the connecting rod 9 pulls on the actuating lever 27 and thus pivots the bearing shaft 18 and the brake eccentric in the direction of the brake bridge 7a in a second position.
  • Characterized the brake eccentric 15 is delivered to the brake bridge and the brake housing is pulled on the slide bar 34 to the brake bridge, so that the brake bridge 7a between the brake eccentric 15 and brake member 23 is clamped.
  • the brake eccentric is, according to a pivoting of the bearing axis 18, inclined.
  • a connection from the pull lever 30 to the brake eccentric 15 is designed with lateral play, that the pull lever 30 can also be inclined to the brake eccentric 15, or that he does not jam.
  • a contact surface of the Bremsexzenters 15, which comes when delivering the first in contact with the brake bridge 7 a rounded or obliquely touched.
  • the brake eccentric 15 is rotated in the clockwise direction, as in the FIGS. 7 and 8 is apparent. Therefore, the brake eccentric 15 further pushes the brake housing back and biases the compression springs 23a of the brake member 23. In this case, the brake eccentric 15, together with the bearing shaft 18, is pushed back to the end stop 24a. The brake eccentric 15 thereby passes back into a plane perpendicular to the brake bridge 7a, or, with respect to the contact surface from the brake eccentric 15 to the brake bridge 7a, a plane of operation. Upon reaching the end stop 24a, a contact force is significantly increased and a corresponding braking force is generated. This brakes the elevator car 2 on the brake bridge 7a. Since a distance from the vertical axis 27c of the bearing shaft 27c to the aperture 24 can be made significantly larger than a distance from the brake eccentric 15 to the aperture 24, a reaction force to the vertical axis 27c can be kept small.
  • any retraction device for example, only a spring.
  • the pull or push rods 9 connecting means such as a pull rope or a hydraulic actuation can be provided.
  • the traction cable could, if necessary, act directly on the pivotable bearing axle 18 via deflecting rollers or via a Bowden cable.
  • the bearing shaft 18 may also be guided via a longitudinal guide, such as a parallel guide or a guide carriage, in the brake housing 17, so that the bearing axis 18 can be displaced together with the brake eccentric 15 to the brake bridge 7a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Handcart (AREA)

Description

Die Erfindung betrifft eine Fangvorrichtung zum Bremsen einer Aufzugskabine und eine Aufzugsanlage mit einer derartigen Fangvorrichtung.The invention relates to a safety gear for braking an elevator car and an elevator installation with such a safety gear.

Die Aufzugsanlage ist in einem Gebäude eingebaut. Sie besteht im Wesentlichen aus einer Kabine, welche über Tragmittel mit einem Gegengewicht oder mit einer zweiten Kabine verbunden ist. Mittels eines Antriebes, der wahlweise auf die Tragmittel, direkt auf die Kabine oder auf das Gegengewicht einwirkt, wird die Kabine entlang von, im Wesentlichen vertikalen, Führungsschienen verfahren. Die Aufzugsanlage wird verwendet, um Personen und Güter innerhalb des Gebäudes über einzelne oder mehrere Etagen hinweg zu befördern.The elevator system is installed in a building. It consists essentially of a cabin, which is connected via suspension means with a counterweight or with a second car. By means of a drive, which acts either on the suspension means, directly on the cabin or on the counterweight, the cabin is moved along, substantially vertical, guide rails. The lift system is used to move people and goods within the building over single or multiple floors.

Derartige Aufzugsanlagen beinhalten Vorrichtungen, um die Aufzugskabine im Falle des Versagens des Antriebes oder der Tragmittel zu sichern oder allenfalls auch bei einem Halt in einer Etage vor ungewolltem Wegdriften zu bewahren. Dazu werden in der Regel Fangvorrichtungen verwendet, welche im Bedarfsfalle die Aufzugskabine an den Führungsschienen abbremsen können. Vermehrt werden dabei Fangvorrichtungen bevorzugt, welche von einem elektronischen Überwachungssystem angesteuert werden können.Such elevator systems include devices to secure the elevator car in the event of failure of the drive or the support means or at best to protect even in a stop in a floor from unwanted drifting away. For this purpose, safety devices are used as a rule, which can slow down the elevator car on the guide rails in case of need. Increasingly, catching devices are preferred which can be controlled by an electronic monitoring system.

Aus der WO 2011/113753 ist eine Bremseinrichtung bekannt, welche elektromagnetisch angesteuert werden kann. Dabei wird, nach erfolgter Zustellung einer Bremsbacke zu einem Bremssteg und sich bewegender Aufzugskabine, der Bremsbacken verdreht und längsverschoben. Dadurch kann die Bremsbacke eine Bremskraft aufbauen und die Kabine bremsen.From the WO 2011/113753 a braking device is known, which can be controlled electromagnetically. In this case, after delivery of a brake shoe to a brake bridge and moving elevator car, the brake shoe is rotated and longitudinally displaced. As a result, the brake shoe can build up a braking force and brake the cab.

DE 198 50 678 C1 offenbart eine Bremseinrichtung gemäß dem Oberbegriff des Anspruchs 1. DE 198 50 678 C1 discloses a braking device according to the preamble of claim 1.

Die im Folgenden dargestellte Lösung bezweckt die Bereitstellung einer alternativen Bremseinrichtung oder Fangvorrichtung, welche ebenfalls zum Anbau an eine Aufzugskabine geeignet ist, und welche ein Bremsen der Aufzugskabine bewirken kann. Die Fangvorrichtung soll einfach betätigbar sein und sie soll einfach wieder zurückgestellt werden können.The solution presented below aims to provide an alternative braking device or safety gear, which is also suitable for attachment to an elevator car, and which can cause braking of the elevator car. The safety gear should be easy to operate and it should be easy to reset.

Eine vorgeschlagene Fangvorrichtung besteht aus einem Bremsgehäuse, welches geformt ist, um wesentliche Teile der Fangvorrichtung aufzunehmen. Das Bremsgehäuse muss dabei diese Teile nicht umschliessen. Das Bremsgehäuse kann auch eine Grundplatte sein, auf der die wesentlichen Teile angeordnet sind. Dieses Bremsgehäuse ist ausgeführt, um wesentliche Spann- und entstehende Bremskräfte aufnehmen zu können. Das Bremsgehäuse beinhaltet Anschlüsse zur Befestigung der Fangvorrichtung an einer Aufzugskabine. Die Fangvorrichtung ist geeignet, um die Aufzugskabine an einem Bremssteg zu bremsen oder zu halten. Dazu ist am oder im Bremsgehäuse ein Bremsexzenter mit einer zylindrischen Lagerbohrung angeordnet. Dieser Bremsexzenter ist von einer Lagerachse aufgenommen, wobei diese Lagerachse im Bremsgehäuse schwenk- oder verschiebbar angeordnet ist. Der auf der Lagerachse angeordnete Bremsexzenter ist in einer ersten Position von dem Bremssteg beabstandet haltbar, und er ist in einer zweiten Position in Kontakt mit dem Bremssteg bringbar. Somit kann der Bremsexzenter einerseits in einer neutralen, nicht bremsenden Stellung, beabstandet vom Bremssteg gehalten werden, und er kann andererseits, im Fall einer erforderlichen Bremsung, in Kontakt mit dem Bremssteg gebracht werden.A proposed safety gear consists of a brake housing which is shaped to receive substantial parts of the safety gear. The brake housing does not have to enclose these parts. The brake housing may also be a base plate on which the essential parts are arranged. This brake housing is designed to accommodate significant tension and braking forces. The brake housing includes connections for attaching the safety gear to an elevator car. The safety gear is suitable for braking or holding the elevator car on a brake bridge. This is on or in the brake housing a Bremsexzenter arranged with a cylindrical bearing bore. This brake eccentric is received by a bearing axis, wherein this bearing axis is arranged pivotably or displaceably in the brake housing. The brake eccentric arranged on the bearing axis is spaced apart from the brake bridge in a first position, and it can be brought into contact with the brake bridge in a second position. Thus, the brake eccentric can on the one hand be kept in a neutral, non-braking position, spaced from the brake bridge, and on the other hand, in the case of a required braking, can be brought into contact with the brake bridge.

Vorzugsweise weist das Bremsgehäuse einen Durchbruch auf, durch den die Lagerachse ragt, und eine erste Einrichtung bewegt, bzw. zieht, den Bremsexzenter zusammen mit der Lagerachse in die erste Position. Diese erste Position ist dabei beispielsweise durch einen Endanschlag des Durchbruchs bestimmt. In der Regel genügt ein starrer Anschlag, der beispielsweise durch einen Durchbruch in der Form eines Langlochs ausgeführt ist. Das Langloch kann dabei vorzugsweise eine Führung der Lagerachse übernehmen. Dies ist Vorteilhaft, da der Durchbruch dadurch wesentliche Kräfte aufnehmen kann, welche beim Bremsen entstehen.The brake housing preferably has an opening through which the bearing axle projects, and a first device moves or pulls the brake eccentric together with the bearing axle into the first position. This first position is determined, for example, by an end stop of the opening. In general, a rigid stop, which is carried out for example by a breakthrough in the form of a slot is sufficient. The slot can preferably take over a leadership of the bearing axis. This is advantageous because the breakthrough can absorb significant forces that arise during braking.

Vorzugsweise ist die Lagerachse im Bremsgehäuse um eine vertikale Achse schwenkbar angeordnet. Beispielsweise ist die Lagerachse in einem hinteren Teil des Bremsgehäuses um die vertikale Achse gelagert. Dadurch können entstehende Kräfte einfach in das Bremsgehäuse eingeleitet werden, da eine zunehmende Distanz zwischen der vertikalen Achse und dem Endanschlag eine Reduktion von Gegenkräften bewirkt.Preferably, the bearing axis is pivotally mounted in the brake housing about a vertical axis. For example, the bearing axis is mounted in a rear part of the brake housing about the vertical axis. As a result, arising forces can be easily introduced into the brake housing, as an increasing distance between the vertical axis and the end stop causes a reduction of opposing forces.

Vorzugsweise ist die erste Einrichtung zum Bewegen des Bremsexzenters in die erste Position eine Feder oder Federmechanik, wobei diese den Bremsexzenter in die vom Endanschlag des Durchbruchs definierte erste Position zieht. Dies ist vorteilhaft, da die Feder einerseits den Bremsexzenter, sofern dieser nicht geklemmt oder betätigt ist, in die erste Position zurückzieht, und andererseits eine Betätigungskraft zum Zustellen des Bremsexzenters zum Bremssteg in einer genau definierten, berechenbaren Grössenordnung beeinflusst. Auch ist weiter von Vorteil, dass die Feder, bzw. die Federmechanik elastisch ist. Damit wird beispielsweise bei einem versehentlichen Streifen des Bremsexzenters am Bremssteg dieser nicht eingerückt, sondern es ist ein relevanter definierbarer Anpressdruck erforderlich, um den Bremsexzenter zu verdrehen. Einem versehentlichen Betätigen der Fangvorrichtung ist damit vorgebeugt.Preferably, the first means for moving the brake eccentric to the first position is a spring or spring mechanism which pulls the brake eccentric into the first position defined by the end stop of the aperture. This is advantageous because the spring, on the one hand, retracts the brake eccentric, provided that it is not clamped or actuated, into the first position, and, on the other hand, influences an actuating force for advancing the brake eccentric to the brake bridge in a precisely defined, calculable order of magnitude. It is also advantageous that the spring, or the spring mechanism is elastic. Thus, for example, in an accidental strip of the brake eccentric on the brake bridge this is not engaged, but it is a relevant definable contact pressure required to rotate the brake eccentric. Accidental operation of the safety gear is thus prevented.

Vorzugsweise ist der Bremssteg ein Bestandteil einer Führungsschiene und die Fangvorrichtung wirkt zum Zwecke des Bremsens der Aufzugskabine mit diesem Bremssteg zusammen. Die Fangvorrichtung weist vorzugsweise weiter einen Bremsteil auf, welcher gegenüber vom Bremsexzenter im oder am Bremsgehäuse angeordnet ist, so dass der Bremssteg der Führungsschiene im Bedarfsfall zwischen dem Bremsexzenter und dem Bremsteil geklemmt werden kann. Dazu wird der Bremsexzenter, wenn er von der zweiten Einrichtung in Kontakt mit dem Bremssteg gebracht ist, durch eine Relativbewegung zwischen Bremssteg und Fangvorrichtung so verdreht, dass er in die erste Position zurückgeschoben wird. Die Form des Bremsexzenters ist dabei so ausgeführt, dass eine Distanz von der äusseren Kontur zum Zentrum der zylindrischen Lagerbohrung in der Drehrichtung stetig zunimmt. Dadurch wird der Bremsexzenter zuerst zurückgedrückt, bis er wiederum am Endanschlag des Durchbruchs ansteht. Danach, oder im Wesentlichen gleichzeitig, wird durch weiteres Drehen des Bremsexzenters die Lagerachse zusammen mit dem Bremsgehäuse verschoben, so dass der Bremsteil schlussendlich ebenfalls den Bremssteg berührt und klemmt. Das Bremsgehäuse ist dazu vorzugsweise elastisch, beispielsweise auf Gleitstangen, seitlich verschiebbar gelagert. Die Gleitstangen können dabei eine entstehende Bremskraft, beispielsweise auf die Aufzugskabine, übertragen. Der Endanschlag des Durchbruchs, vorzugsweise ein Langloch, übernimmt und überträgt dabei eine vom Bremsexzenter bewirkte Anpresskraft und überträgt diese in das Bremsgehäuse. Besonders vorteilhaft ist, dass, bei Verwendung einer schwenkbaren Lagerachse, der Bremsexzenter lediglich beim Andrücken an den Bremssteg im Rahmen des erforderlichen Verschwenkens schräggestellt wird, und dass der Bremsexzenter beim Zurückdrücken an den Endanschlag wiederum in eine zum Bremssteg plane Arbeitsstellung gelangt. Dadurch ist der Bremsexzenter und die Lagerachse ideal belastbar.Preferably, the brake bridge is a component of a guide rail and the safety device interacts with this brake bridge for the purpose of braking the elevator cage. The catching device preferably further comprises a brake member, which is arranged opposite to the brake eccentric in or on the brake housing, so that the braking web of the guide rail in If necessary, between the brake eccentric and the brake member can be clamped. For this purpose, the brake eccentric, when brought from the second device in contact with the brake bridge, rotated by a relative movement between the brake bridge and safety gear so that it is pushed back into the first position. The shape of the Bremsexzenters is designed so that a distance from the outer contour to the center of the cylindrical bearing bore in the direction of rotation increases steadily. As a result, the brake eccentric is first pushed back until it in turn is present at the end stop of the breakthrough. Thereafter, or substantially simultaneously, the bearing axis is moved together with the brake housing by further rotation of the brake eccentric, so that the braking member finally also touches the brake bridge and clamped. The brake housing is preferably elastic, for example on sliding rods, laterally displaceably mounted. The sliding rods can thereby transmit a braking force, for example to the elevator car. The end stop of the opening, preferably a slot, takes over and transmits thereby caused by the brake eccentric contact pressure and transmits it into the brake housing. It is particularly advantageous that, when using a pivotable bearing axis, the brake eccentric is tilted only when pressed against the brake bridge within the required pivoting, and that the brake eccentric when pushing back to the end stop in turn reaches a flat plane to the brake work position. As a result, the brake eccentric and the bearing axis is ideal load.

Vorzugsweise ist die Lagerachse fest zu einem Betätigungshebel verbunden. Der Betätigungshebel ist dabei beispielsweise mit der Lagerachse verschraubt, verschweisst oder mittels Bolzen verbunden. Auf jeden Fall ist die Verbindung derart, dass die Lagerachse durch den Betätigungshebel um die vertikale Achse geschwenkt werden kann. Dadurch kann der Bremsexzenter durch den Betätigungshebel in Kontakt mit dem Bremssteg gebracht werden. Eine Zustellkraft ist so bemessen, dass einerseits eine Rückzugskraft der ersten Einrichtung sicher überwunden werden kann und zusätzlich ein Kraftüberschuss besteht der genügt, um den Bremsexzenter so stark an den Bremssteg anzudrücken, dass er durch die Relativbewegung zwischen Bremssteg und Fangvorrichtung sicher verdreht werden kann. Eine derartige Zustellkraft liegt beispielsweise in einer Grössenordnung von 150 bis 700 Newton, vorzugsweise 500 bis 600 Newton. Mit dieser Zustellkraft können übliche, mit einer Randrierung oder Rillung versehene Bremsexzenter sicher verdreht werden.Preferably, the bearing axis is fixedly connected to an actuating lever. The actuating lever is screwed, for example, with the bearing axis, welded or connected by bolts. In any case, the connection is such that the bearing axis can be pivoted by the actuating lever about the vertical axis. Thereby, the brake eccentric can be brought by the actuating lever in contact with the brake bridge. A delivery force is such that on the one hand a retraction force of the first device can be safely overcome and in addition there is an excess of force sufficient to press the brake eccentric so strong on the brake bridge, that it can be securely rotated by the relative movement between the brake bridge and safety gear. Such a delivery force is for example of the order of 150 to 700 Newton, preferably 500 to 600 Newton. With this delivery force can be twisted securely, usually provided with a Randrierung or grooving Bremsexzenter.

Vorzugsweise kann der Betätigungshebel im Bedarfsfall von einem Aktuator, wie er beispielsweise aus der Schrift WO 2011/113753 bekannt ist, geschwenkt werden, so dass der Betätigungshebel den Bremsexzenter in Kontakt mit dem Bremssteg bringen kann.If required, the actuating lever can preferably be provided by an actuator, as is known, for example, from the document WO 2011/113753 is known to be pivoted, so that the actuating lever can bring the brake eccentric in contact with the brake bridge.

Vorzugsweise ist eine Halteplatte verwendet, um den Bremsexzenter auf der Lagerachse zu sichern. Die Lagerachse ist dazu mit einem Anschlagbund, allenfalls mit entsprechender Druckscheibe, versehen, mittels dem eine Lage des Bremsexzenters auf der Lagerachse bestimmt ist. Dadurch ist ein Zusammenbau der Fangvorrichtung einfach ermöglicht. Beispielsweise kann die Lagerachse in einem rückseitigen Teil des Bremsgehäuses schwenkbar befestigt werden. Der Betätigungshebels kann an der Lagerachse vor, nach oder zusammen mit der Lagerachse befestigt werden. Anschliessend wird der Bremsexzenter, allenfalls mit einer integrierten Lager-Gleitbüchse, auf die Lagerachse aufgelegt und mittels der Haltescheibe auf der Lagerachse gesichert. Die Halteplatte überdeckt die Lagerbohrung und sie ist vorzugsweise mit einem Schraubenpaar an der Lagerachse befestigt.Preferably, a retaining plate is used to secure the brake eccentric on the bearing axis. For this purpose, the bearing axis is provided with a stop collar, possibly with a corresponding thrust washer, by means of which a position of the brake eccentric on the bearing axis is determined. As a result, an assembly of the safety gear is easily possible. For example, the bearing axis can be pivotally mounted in a rear part of the brake housing. The operating lever can be fixed to the bearing axis before, after or together with the bearing axis. Subsequently, the brake eccentric, possibly with an integrated bearing slide bush, placed on the bearing axis and secured by means of the retaining washer on the bearing axis. The retaining plate covers the bearing bore and it is preferably fastened with a pair of screws on the bearing axis.

Vorzugsweise umfasst die Federmechanik der ersten Einrichtung zum Ziehen des Bremsexzenters in die erste Position einen Zughebel, einen Kipphebel und zumindest eine Feder. Der Zughebel und der Kipphebel sind gelenkig miteinander verbunden, wobei der Zughebel zum Bremsexzenter verbunden ist und der Kipphebel im Bremsgehäuse schwenkbar gelagert ist. Die Befestigung des Zughebels am Bremsexzenter ist dabei so ausgeführt, dass eine, beim Verschwenken der Lagerache entstehende, Schrägstellung des Bremsexzenters aufgenommen werden kann. Die Feder wirkt weiter derart auf den Kipphebel ein, dass er über den Zughebel den Bremsexzenter in die erste Position zieht. Über den Kipphebel und die Anordnung der Feder kann ein Kraftanstieg der Rückzugskraft idealisiert werden und weiter kann der Kipphebel einfach einen Schalter betätigen, wenn er eine einer Bremsstellung des Bremsexzenters entsprechende Kippstellung erreicht. Damit ist eine Überwachung der Fangvorrichtung einfach möglich und eine Steuerung kann dadurch beispielsweise eine zweite Fangvorrichtung ebenfalls betätigen, wenn eine erste Fangvorrichtung versehentlich in Fang gerät. Damit ist ein einseitiges Fangen verhindert.Preferably, the spring mechanism of the first means for pulling the Bremsexzenters in the first position comprises a pull lever, a rocker arm and at least one spring. The pull lever and the rocker arm are hinged together, wherein the pull lever is connected to the brake eccentric and the rocker arm is pivotally mounted in the brake housing. The attachment of the pull lever on the brake eccentric is designed so that a, upon pivoting of the bearing axis resulting, skew of the brake eccentric can be added. The spring continues to act on the rocker arm such that it pulls the brake eccentric into the first position via the pull lever. About the rocker arm and the arrangement of the spring, an increase in force of the retracting force can be idealized and further, the rocker arm can easily operate a switch when it reaches a braking position of the brake eccentric corresponding tilt position. For a monitoring of the safety gear is easily possible and a controller can thus, for example, operate a second safety gear also when a first safety gear accidentally caught in Fang. This prevents unilateral catching.

Vorzugsweise beinhaltet die Federmechanik weiter eine Rasterstellung, welche den Bremsexzenter in der ersten Position gegen ein unbeabsichtigtes Schwenken sichert. Die Rasterstellung kann ein Kugelschnäpper oder ähnliches sein. Damit wird einem Schwingen des Bremsexzenters vorgebeugt.Preferably, the spring mechanism further includes a grid position, which secures the brake eccentric in the first position against unintentional pivoting. The grid position may be a ball catch or the like. This prevents a swinging of the brake eccentric.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels im Zusammenhang mit den Figuren beispielhaft erläutert.In the following, the invention will be explained by way of example with reference to an embodiment in conjunction with the figures.

Es zeigen:

Figur 1
eine schematische Ansicht einer Aufzugsanlage,
Figur 2
ein Paar von Fangvorrichtungen, angebaut an eine Aufzugskabine,
Figur 3
eine Fangvorrichtung in einer ersten, unbetätigter Position,
Figur 4
die Fangvorrichtung von Figur 3 in einem Horizontalschnitt,
Figur 5
eine Fangvorrichtung in einer zweiten, betätigten Position,
Figur 6
die Fangvorrichtung von Figur 5 in einem Horizontalschnitt,
Figur 7
eine Fangvorrichtung in einer bremsenden Position, und
Figur 8
die Fangvorrichtung von Figur 7 in einem Horizontalschnitt.
Show it:
FIG. 1
a schematic view of an elevator system,
FIG. 2
a pair of safety gears, attached to an elevator car,
FIG. 3
a safety gear in a first, unactuated position,
FIG. 4
the safety gear of FIG. 3 in a horizontal section,
FIG. 5
a safety device in a second, actuated position,
FIG. 6
the safety gear of FIG. 5 in a horizontal section,
FIG. 7
a safety gear in a braking position, and
FIG. 8
the safety gear of FIG. 7 in a horizontal section.

In den Figuren sind für gleichwirkende Teile über alle Figuren hinweg dieselben Bezugszeichen verwendet.In the figures, the same reference numerals are used across the figures for equivalent parts.

Figur 1 zeigt eine Aufzugsanlage 1 in einer Gesamtschau. Die Aufzugsanlage 1 ist in einem Gebäude eingebaut, und sie dient dem Transport von Personen oder Gütern innerhalb des Gebäudes. Die Aufzugsanlage beinhaltet eine Aufzugskabine 2, welche sich entlang von Führungsschienen 6 auf- und abwärts bewegen kann. Die Aufzugskabine 2 ist vom Gebäude über Türen zugänglich. Ein Antrieb 5 dient zum Antreiben und Halten der Aufzugskabine 2. Der Antrieb 5 ist im oberen Bereich des Gebäudes angeordnet und die Kabine 2 hängt mit Tragmitteln 4, beispielsweise Tragseile oder Tragriemen, am Antrieb 5. Die Tragmittel 4 sind über den Antrieb 5 weiter zu einem Gegengewicht 3 geführt. Das Gegengewicht gleicht einen Massenanteil der Aufzugskabine 2 aus, so dass der Antrieb 5 zur Hauptsache lediglich ein Ungleichgewicht zwischen Kabine 2 und Gegengewicht 3 ausgleichen muss. Der Antrieb 5 ist im Beispiel im oberen Bereich des Gebäudes angeordnet. Er könnte selbstverständlich auch im Bereiche der Kabine 2 oder des Gegengewichts 3 angeordnet sein. FIG. 1 shows an elevator system 1 in an overall view. The elevator installation 1 is installed in a building and serves to transport persons or goods within the building. The elevator installation includes an elevator car 2, which can move up and down along guide rails 6. The elevator car 2 is accessible from the building via doors. A drive 5 serves to drive and hold the elevator car 2. The drive 5 is arranged in the upper area of the building and the car 2 is suspended by means of support means 4, for example carrying ropes or carrying straps, on the drive 5. The suspension means 4 are further accessible via the drive 5 a counterweight 3 led. The counterweight compensates for a mass fraction of the elevator car 2, so that the drive 5 has to compensate for the main thing only an imbalance between the car 2 and counterweight 3. The drive 5 is arranged in the example in the upper part of the building. It could of course also be arranged in the area of the car 2 or the counterweight 3.

Die Aufzugskabine 2 ist mit einer Fangvorrichtung 10 ausgerüstet, welche geeignet ist, um die Aufzugskabine 2 bei einer unerwarteten Bewegung, bei Übergeschwindigkeit oder bei einem Halt zu sichern und/oder zu verzögern. Die Fangvorrichtung 10 ist im Beispiel unterhalb der Kabine 2 angeordnet. Die Aufzugsanlage 2 beinhaltet weiter eine Sicherheitssteuerung 11, welche im Beispiel an der Aufzugskabine 2 angeordnet ist. Die Sicherheitssteuerung 11 überwacht Bewegungen der Aufzugskabine 2 und sie aktiviert im Bedarfsfall die Fangvorrichtung 10. Im vorliegenden Beispiel sind, siehe Figur 2, zwei Fangvorrichtungen 10, bzw. ein Paar Fangvorrichtungen 10, links und rechts der Aufzugskabine 2 angeordnet, wo sie bedarfsweise mit Führungsschienen 7 zusammenwirken. Das Paar von Fangvorrichtungen 10 ist im Beispiel von einem zentralen Aktuator 8 betätigt, der seinerseits von der Sicherheitssteuerung 11 angesteuert ist. Der Aktuator 8 ist mittels Verbindungsstangen 9, vorzugsweise Zugstangen zu den Fangvorrichtungen 10 verbunden.The elevator car 2 is equipped with a safety gear 10 which is suitable for securing and / or decelerating the elevator car 2 in the event of unexpected movement, overspeeding or stopping. The safety gear 10 is arranged below the car 2 in the example. The elevator installation 2 further includes a safety controller 11, which in the example is arranged on the elevator car 2. The safety controller 11 monitors movements of the elevator car 2 and activates the safety gear 10 if necessary. In the present example, see FIG. 2 , Two safety gears 10, and a pair of safety gears 10, left and right of the elevator car 2, where they interact with guide rails 7, if necessary. The pair of safety gears 10 is operated in the example of a central actuator 8, which in turn is controlled by the safety controller 11. The actuator 8 is connected by means of connecting rods 9, preferably tie rods to the safety gear 10.

Die Fangvorrichtung 10 besteht in dem in den Figuren 3 bis 8 ausgeführten Beispiel aus einem Bremsgehäuse 17. Das Bremsgehäuse ist als tragende Struktur ausgeführt. Es ist über mindestens eine Gleitstange 34 und über Kippanschläge zur Aufzugskabine 2 verbunden. Das Bremsgehäuse 17 ist beispielsweise als Gussteil, als Schweisskonstruktion oder aus einer anderen maschinell bearbeiteten Struktur hergestellt. Es ist ausgelegt, um erforderliche Brems- und Andruckkräfte aufzunehmen und zur Aufzugskabine 2 zu übertragen. Das Bremsgehäuse 17 ist beispielsweise über eine Federanordnung (nicht dargestellt) auf der Gleitstange 34 in einer, durch eine Anschlagschraube 17a definierten, Basisposition gehalten. Damit kann sich das Bremsgehäuse 17 bei einer Betätigung der Fangvorrichtung 10 seitlich zum Bremssteg 7a der Führungsschiene 7 ausrichten.The safety gear 10 is in the in the FIGS. 3 to 8 running example of a brake housing 17. The brake housing is designed as a supporting structure. It is connected via at least one slide bar 34 and tilt stops to the elevator car 2. The brake housing 17 is made for example as a casting, as a welded construction or from another machined structure. It is designed to receive required braking and pressure forces and to transfer to the elevator car 2. The brake housing 17 is held, for example via a spring arrangement (not shown) on the slide bar 34 in a base position defined by a stop screw 17a. Thus, the brake housing 17 can align laterally to the brake pad 7 a of the guide rail 7 upon actuation of the safety gear 10.

Im Bremsgehäuse 17 ist eine Lagerachse 18 angeordnet. Diese ist um eine vertikale Achse 27a schwenkbar im Bremsgehäuse 17 angeordnet. Auf einem vorderen Teil der Lagerachse 18 ist, über eine Gleitschale 26, ein Bremsexzenter 15 angeordnet. Der Bremsexzenter 15 weist dazu eine zylindrische Lagerbohrung 16 auf und die Lagerachse 18 beinhaltet, vorzugsweise, einen Bund an dem der Bremsexzenter anschlagen kann. Der Bremsexzenter 15 weist weiter, ausgehend von einem Mittenbereich, eine in beiden Drehrichtungen ansteigende Aussen-Kurvenform auf, die in einer Bremsfläche mit einem geraden Abschnitt endet. Das Bremsgehäuse 17 weist, im Bereich zwischen Bremsexzenter 15 und der vertikalen Achse 27a einen Durchbruch 24, vorzugsweise ein Langloch, auf, durch den die Lagerachse 18 durchragen kann.In the brake housing 17, a bearing axle 18 is arranged. This is arranged pivotably about a vertical axis 27a in the brake housing 17. On a front part of the bearing shaft 18, a brake eccentric 15 is arranged via a sliding shell 26. The brake eccentric 15 has for this purpose a cylindrical bearing bore 16 and the bearing shaft 18 includes, preferably, a collar on which the brake eccentric can strike. The brake eccentric 15 further has, starting from a central region, a rising in both directions outer curve shape, which ends in a braking surface with a straight portion. The brake housing 17 has, in the region between the brake eccentric 15 and the vertical axis 27 a, an opening 24, preferably a slot, through which the bearing axle 18 can protrude.

Der Durchbruch 24 beinhaltet einen Endanschlag 24a an welchem die Lagerachse 18 anstehen kann und welcher so angeordnet ist, dass der Bremsexzenter im Wesentlichen senkrecht zum Bremssteg 7a angeordnet werden kann, bzw. das eine Kontaktfläche des Bremsexzenters plan zum Bremssteg liegt. Der Durchbruch 24 ist derart gestaltet, dass er eine Zustellung des Bremsexzenters 15 zum Bremssteg 7a ermöglicht. Die Zustellung entspricht zumindest einem doppelten Betrag eines Spiels zwischen Bremsflächen und Bremssteg. Die Zustellung beträgt beispielsweise etwa 3 bis 8 Millimeter. Vorzugsweise ist der Durchbruch 24 so geformt, dass er die Lagerachse 18 in vertikaler Richtung führt, so dass Brems- und Anpresskräfte über den Endanschlag 24a des Durchbruchs 25 übertragen werden können.The opening 24 includes an end stop 24a on which the bearing axis 18 can be present and which is arranged so that the brake eccentric can be arranged substantially perpendicular to the brake bridge 7a, or a contact surface of the brake eccentric lies flat to the brake bridge. The opening 24 is designed such that it allows a delivery of the brake eccentric 15 to the brake bridge 7a. The delivery corresponds to at least a double amount of a game between the braking surfaces and the brake bridge. The delivery is for example about 3 to 8 millimeters. Preferably, the opening 24 is shaped so that it leads the bearing axis 18 in the vertical direction, so that braking and pressing forces can be transmitted via the end stop 24a of the opening 25.

Der Bremsexzenter 15 ist mit einer Halteplatte 29 auf der Lagerachse 18 gesichert. Die Halteplatte 29 ist beispielsweise mit einer Stirnfläche der Lagerachse verschraubt. Der Bremsexzenter 15 könnte natürlich auch mit einem Klemm- oder Sicherungsring gehalten werden.The brake eccentric 15 is secured with a retaining plate 29 on the bearing axis 18. The holding plate 29 is screwed, for example, with an end face of the bearing axis. Of course, the brake eccentric 15 could also be held with a clamping or securing ring.

Im Beispiel ist der Lagerachse 18 mit einem Betätigungshebel 27 versehen. Der Betätigungshebel 27 ist an der Lagerachse 18 mit einem Lagerzapfen der vertikalen Achse 27a sowie einem Bolzen 27c so verbunden, dass eine in den Betätigungshebel 27 eingeleitete Betätigungskraft 27 die Lagerachs 18 um die vertikale Achs 27 schwenken kann. Der Betätigungshebel 27 ist, mittels einer Verbindungstelle 27b, zur Verbindungsstange 9, vorzugsweise in der Form von Zug- oder Druckstangen, verbunden. Die Verbindungsstangen 9 sind, wie im Zusammenhang mit Figur 2 erläutert, zu einem Aktuator 8 verbunden. In den Beispielen der Figuren 3 bis 8 ist die Verbindungstange 9 mit einer Längeneinstellung 9a versehen, so dass eine Solllage der Lagerachse 18 genau eingestellt werden kann. Vorzugsweise ist eine der Verbindungen vom Aktuator 8 zur schwenkbaren Achse 18 mit Spiel oder einer elastischen Verbindung ausgeführt. Damit können Ungenauigkeiten oder Kräfte die beispielsweise beim Zurückstellen auftreten können ausgeglichen werden.In the example of the bearing axis 18 is provided with an actuating lever 27. The operating lever 27 is on the bearing axis 18 with a bearing journal of the vertical axis 27a and a bolt 27c so connected that an introduced into the operating lever 27 actuating force 27 can pivot the Lagerachs 18 about the vertical axis 27. The actuating lever 27 is, by means of a connection point 27b, connected to the connecting rod 9, preferably in the form of pull or push rods. The connecting rods 9 are, as related to FIG. 2 explained, connected to an actuator 8. In the examples of FIGS. 3 to 8 the connecting rod 9 is provided with a length adjustment 9a, so that a desired position of the bearing axis 18 can be adjusted accurately. Preferably, one of the connections from the actuator 8 to the pivotable axle 18 is made with play or an elastic connection. This can be compensated for inaccuracies or forces that can occur, for example, when resetting.

Die Fangvorrichtung beinhaltet ein Bremsteil 23, der gegenüber dem Bremsexzenter 15 im Bremsgehäuse 17 so angeordnet ist, dass der Bremssteg 7a zwischen dem Bremsexzenter 15 und dem Bremsteil 23 angeordnet werden kann. Der Bremsteil ist mittels Druckfedern 23a, vorzugsweise vorgespannten Druckfedern 23a, im Bremsgehäuse 17 abgestützt. Der Bremsteil 23 kann dazu, mittels Federbolzen 23b und Einstellmuttern 23c, gegen die Druckfedern 23a vorgespannt werden.The safety gear includes a brake member 23 which is arranged opposite to the brake eccentric 15 in the brake housing 17 so that the brake pad 7a can be arranged between the brake eccentric 15 and the brake member 23. The brake member is supported in the brake housing 17 by means of compression springs 23a, preferably prestressed compression springs 23a. The brake member 23 can be biased by means of spring pin 23b and adjusting nuts 23c, against the compression springs 23a.

Der Bremsexzenter ist weiter, mittels einer ersten Einrichtung 19, in einer ersten Position gehalten, wie es in den Figuren 3 und 4 dargestellt ist. Ein am Bremsexzenter befestigter Zughebel 30 ist zu einem Kipphebel 31 verbunden, der seinerseits in einem, am Bremsgehäuse 17 befestigten, Halteblech 19a schwenkbar gelagert ist. Der Kipphebel 31, damit der Zughebel 30 und schlussendlich der Bremsexzenter 15 zusammen mit der Lagerachse 18 werden so in der ersten Position gehalten, wobei sie dabei gegen den Endanschlag 24a des Durchbruchs 24 gezogen werden. Eine Lage des Kipphebels 31 und damit eine Lage des Bremsexzenters 15 werden mittels einer Schaltkurve 32a von einem Schalter 32 überwacht. In der, in den Figuren 3 und 4 dargestellten, ersten Position ist der Bremsexzenter in seiner Mittenlage. Er ist vom Bremssteg 7a distanziert und das Bremsgehäuse 17 befindet sich an einer durch die Anschlagschraube bestimmten Endlage. Die Fangvorrichtung 10 und somit die Aufzugskabine 2 kann somit frei verfahren. Der Schalter 32 ist in einer unbetätigter Schaltstellung und dieses Signal wird bedarfsweise an die Sicherheitssteuerung 11 oder auch an die Aufzugssteuerung 6 weitergegeben. Optional ist in der dargestellten Lösung bei der Schaltkurve 32a eine Rasterstellung 33, beispielsweise in der Form eines Kugelschnäppers, integriert. Diese stellt eine zusätzliche Haltekraft zur Verfügung, welche den Bremsexzenter in der ersten Position hält. Eine Rückhaltekraft der Feder 21 kann entsprechend kleiner gewählt werden. Die Rasterstellung kann beispielsweise auch beim Bremsexzenter 15 angeordnet werdenThe brake eccentric is further, by means of a first device 19, held in a first position, as in the FIGS. 3 and 4 is shown. A pull lever 30 attached to the brake eccentric is connected to a rocker arm 31, which in turn is pivotally mounted in a retaining plate 19a fastened to the brake housing 17. The rocker arm 31, so that the pull lever 30 and finally the brake eccentric 15 together with the bearing axis 18 are held in the first position, while they are pulled against the end stop 24 a of the aperture 24. A position of the rocker arm 31 and thus a position of the brake eccentric 15 are monitored by a switch 32 by means of a switching cam 32a. In the, in the FIGS. 3 and 4 shown, first position is the brake eccentric in its center position. He is distanced from the brake bridge 7a and the brake housing 17 is located at an end position determined by the stop screw. The safety gear 10 and thus the elevator car 2 can thus move freely. The switch 32 is in an unactuated switch position and this signal is passed as needed to the safety controller 11 or to the elevator control 6. Optionally, in the illustrated solution in the switching curve 32a, a grid position 33, for example in the form of a Kugelschnäppers, integrated. This provides an additional holding force which keeps the brake eccentric in the first position. A retaining force of the spring 21 can be selected correspondingly smaller. The grid position can also be arranged, for example, in the case of the brake eccentric 15

In den Figuren 5 und 6 wird die Fangvorrichtung 10 betätigt. Die Verbindungsstange 9 zieht am Betätigungshebel 27 und schwenkt somit die Lagerachse 18 und den Bremsexzenter in Richtung des Bremssteges 7a in eine zweite Position. Dadurch wird der Bremsexzenter 15 zum Bremssteg zugestellt und das Bremsgehäuse wird auf der Gleitstange 34 zum Bremssteg zugezogen, so dass der Bremssteg 7a zwischen Bremsexzenter 15 und Bremsteil 23 geklemmt wird. Der Bremsexzenter ist dabei, entsprechend einer Schwenkung der Lagerachse 18, schräggestellt. Eine Verbindung vom Zughebel 30 zum Bremsexzenter 15 ist derart mit seitlichem Spiel ausgeführt, dass der Zughebel 30 zum Bremsexzenter 15 ebenfalls schräggestellt werden kann, bzw. dass er nicht klemmt. Allenfalls kann eine Kontaktfläche des Bremsexzenters 15, die beim Zustellen als erstes in Kontakt mit dem Bremssteg 7a gelangt gerundet oder schräg angefasst sein.In the FIGS. 5 and 6 the safety gear 10 is actuated. The connecting rod 9 pulls on the actuating lever 27 and thus pivots the bearing shaft 18 and the brake eccentric in the direction of the brake bridge 7a in a second position. Characterized the brake eccentric 15 is delivered to the brake bridge and the brake housing is pulled on the slide bar 34 to the brake bridge, so that the brake bridge 7a between the brake eccentric 15 and brake member 23 is clamped. The brake eccentric is, according to a pivoting of the bearing axis 18, inclined. A connection from the pull lever 30 to the brake eccentric 15 is designed with lateral play, that the pull lever 30 can also be inclined to the brake eccentric 15, or that he does not jam. At best, a contact surface of the Bremsexzenters 15, which comes when delivering the first in contact with the brake bridge 7 a rounded or obliquely touched.

Bewegt sich nun die Fangvorrichtung 10 in Relation zum Bremssteg 7a abwärts, wird der Bremsexzenter 15 in Uhrzeigerrichtung verdreht, wie es in den Figuren 7 und 8 ersichtlich ist. Der Bremsexzenter 15 drückt deswegen das Bremsgehäuse weiter zurück und spannt die Druckfedern 23a des Bremsteils 23. Dabei wird auch der Bremsexzenter 15, zusammen mit der Lagerachse 18, zum Endanschlag 24a zurückgedrückt. Der Bremsexzenter 15 gelangt dadurch wieder in eine zum Bremssteg 7a rechtwinklige, bzw, betreffend der Kontaktfläche vom Bremsexzenter 15 zum Bremssteg 7a plane, Arbeitslage. Mit Erreichen des Endanschlags 24a wird eine Anpresskraft deutlich erhöht und eine entsprechende Bremskraft wird generiert. Dadurch wir die Aufzugskabine 2 an dem Bremssteg 7a gebremst. Da eine Distanz von der vertikalen Achse 27c der Lagerachse 27c zum Durchbruch 24 deutlich grösser als eine Distanz vom Bremsexzenter 15 zum Durchbruch 24 gewählt werden kann, kann eine Reaktionskraft auf die vertikale Achse 27c klein gehalten werden.Now moves the safety gear 10 in relation to the brake bridge 7a downwards, the brake eccentric 15 is rotated in the clockwise direction, as in the FIGS. 7 and 8 is apparent. Therefore, the brake eccentric 15 further pushes the brake housing back and biases the compression springs 23a of the brake member 23. In this case, the brake eccentric 15, together with the bearing shaft 18, is pushed back to the end stop 24a. The brake eccentric 15 thereby passes back into a plane perpendicular to the brake bridge 7a, or, with respect to the contact surface from the brake eccentric 15 to the brake bridge 7a, a plane of operation. Upon reaching the end stop 24a, a contact force is significantly increased and a corresponding braking force is generated. This brakes the elevator car 2 on the brake bridge 7a. Since a distance from the vertical axis 27c of the bearing shaft 27c to the aperture 24 can be made significantly larger than a distance from the brake eccentric 15 to the aperture 24, a reaction force to the vertical axis 27c can be kept small.

Gleichzeitig wurde durch den drehenden Bremsexzenter 15 die Federmechanik 19 verdreht und der Schalter 32 wurde durch die Schaltkurve 32a betätigt. Ein Sicherheitskreis zur Aufzugssteuerung 6 wird dadurch beispielsweise unterbrochen und die Sicherheitssteuerung 11 kann das Ansprechen der Fangvorrichtung registrieren.At the same time, the spring mechanism 19 was rotated by the rotating brake eccentric 15 and the switch 32 was actuated by the switching cam 32a. A safety circuit for the elevator control 6 is thereby interrupted, for example, and the safety controller 11 can register the response of the safety gear.

Gleichzeitig wurden, durch ein Zurückdrängen des Bremsexzenters 15 - er liegt ja, zusammen mit der Lagerachse 18 am Endanschlag 24a des Durchbruchs 24 an - auch der Betätigungshebel 27 und die Verbindungsstangen 9 zurückbewegt. Dadurch kann beispielsweise der Aktuator 8, bzw. ein Kraftteil des Aktuators 8, wieder gespannt werden.At the same time, by a pushing back of the Bremsexzenters 15 - he is yes, together with the bearing axis 18 on the end stop 24a of the opening 24 - and the operating lever 27 and the connecting rods 9 moved back. As a result, for example, the actuator 8, or a force part of the actuator 8, are stretched again.

Zum Zwecke eines Rückstellens der Fangvorrichtung kann jetzt lediglich die Fangvorrichtung 10, bzw. die Aufzugskabine 2, zurückbewegt werden. Dadurch wird der Bremsexzenter 15 zurückgedreht. Wenn der Aktuator 8 zu diesem Zeitpunkt aktiviert wird, kann er den Bremsexzenter direkt in der ersten Position zurückhalten, und die Fangvorrichtung wird in die in den Figuren 3 und 4 dargestellte erste Position zurückgestellt.For the purpose of resetting the safety gear, only the safety gear 10, or the elevator car 2, can now be moved back. As a result, the brake eccentric 15 is turned back. If the actuator 8 is activated at this time, it can hold the brake eccentric directly in the first position, and the safety gear is in the in the FIGS. 3 and 4 shown restored first position.

Die Funktionsweise bei entgegengesetzter Fahrrichtung verläuft sinngemäss, wobei dann der Bremsexzenter 15 in die Gegenrichtung gedreht wird.The operation in the opposite direction of travel is analogous, in which case the brake eccentric 15 is rotated in the opposite direction.

Anstelle der Federmechanik 19 kann eine beliebige Rückzugseinrichtung, beispielsweise lediglich eine Feder verwendet sein. Selbstverständlich können anstelle der Zug- oder Druckstangen 9 Verbindungsmittel wie ein Zugseil oder eine hydraulische Betätigung vorgesehen werden. Das Zugseil könnte, allenfalls über Umlenkrollen oder über einen Bowdenzug direkt an der schwenkbaren Lagerachse 18 angreifen. Alternativ kann die Lagerachse 18 auch über eine Längsführung, wie eine Parallelführung oder einen Führungschlitten, im Bremsgehäuse 17 geführt sein, so dass die Lagerachse 18 zusammen mit dem Bremsexzenter 15 verschiebbar zum Bremssteg 7a zugestellt werden kann.Instead of the spring mechanism 19 may be used any retraction device, for example, only a spring. Of course, instead of the pull or push rods 9 connecting means such as a pull rope or a hydraulic actuation can be provided. The traction cable could, if necessary, act directly on the pivotable bearing axle 18 via deflecting rollers or via a Bowden cable. Alternatively, the bearing shaft 18 may also be guided via a longitudinal guide, such as a parallel guide or a guide carriage, in the brake housing 17, so that the bearing axis 18 can be displaced together with the brake eccentric 15 to the brake bridge 7a.

Claims (12)

  1. Safety brake (10) for braking or holding a lift cage (2) at a brake web (7a), comprising:
    - a brake eccentric (15) with a cylindrical bearing bore (16), and
    - a brake housing (17) with a bearing axle (18) for mounting the brake eccentric (15), characterised in that the bearing axle (18) is arranged in the brake housing to be pivotable or displaceable so that the brake eccentric (15), which is arranged on the bearing axle (18), in a first position can be kept at a spacing from the brake web (7a) and in a second position can be brought into contact with the brake web (7a).
  2. Safety brake (10) according to claim 1, characterised in that the brake housing has a passage (24) through which the bearing axle (18) projects, wherein a first device (19) moves the brake eccentric (15) together with the bearing axle (18) into the first position and the first position is determined by an end stop (24a) of the passage (24).
  3. Safety brake (10) according to claim 1 or 2, characterised in that the bearing axle (18) is arranged in the brake housing (17) to be pivotable about a vertical axis (27a).
  4. Safety brake (10) according to claim 2 or 3, characterised in that the first device (19) for moving the brake eccentric into the first position comprises a spring (21) or spring mechanism (30, 21, 31), which draws the brake eccentric (15) into the first position defined by the end abutment (24a) of the passage (24).
  5. Safety brake (10) according to claim 2 or 3, wherein the brake web (7a) is a component of a guide rail (7) and the safety brake (10) co-operates with this brake web (7a) for the purpose of braking the lift cage (2) and the safety brake (10) further comprises a brake member (23) which is arranged opposite the brake eccentric (15) in or at the brake housing (17) so that the brake web (7a) of the guide rail (7) can when required be clamped between the brake eccentric (15) and the brake member (23), wherein the brake eccentric (15) when it is brought by the second device (25, 27) into contact with the brake web (7a) is so rotated by a relative movement between brake web (7a) and safety brake (10) that together with the bearing axle (18) it is pushed back into the first position and the end stop (24a) of the passage (24) accepts a pressing force generated by the brake eccentric (15) and transmits it to the brake housing (17).
  6. Safety brake (10) according to any one of claims 2 to 5, characterised in that the bearing axle (18) is fixedly connected with an actuating lever (27) and the actuating lever (27) together with the bearing axle (18) is pivotable about the vertical axis (27a) and the actuating lever (27) when required is pivotable by an actuator (8) together with the bearing axle (18) to bring the brake eccentric (15) into contact with the brake web (7a).
  7. Safety brake (10) according to any one of the preceding claims, characterised in that the brake eccentric (15) is secured on the bearing axle (18) by a mounting plate (29).
  8. Safety brake (10) according to any one of claims 2 to 7, characterised in that a spring mechanism (30, 21, 31) of the first device (19) for drawing the brake eccentric (15) into the first position comprises a pull lever (30), a rocker (31) and a spring (21), wherein the pull lever (30) and the rocker (31) are pivotably connected together and wherein the pull lever (30) is connected with the brake eccentric (15) and the rocker (31) is pivotably mounted in the brake housing (17), and the spring (21) so acts on the rocker (31) that it draws the brake eccentric (15) into the first position by way of the pull lever (30).
  9. Safety brake (10) according to claim 8, characterised in that the rocker (31) actuates a switch (32) when it reaches a tilt setting corresponding with a braking setting of the brake eccentric (15).
  10. Safety brake (10) according to claim 8 or 9, characterised in that the spring mechanism (30, 21, 31) includes a detent setting (33) which secures the brake eccentric (15) in the first position against unintended pivotation.
  11. Lift installation (1) with a lift cage (2) and at least one pair of safety brakes (10) according to any one of the preceding claims, wherein the pair of safety brakes (10) is actuated by a centrally arranged actuator (8) and wherein the actuator can act on the actuating lever (27) of the safety brakes (10) by way of pulling or pushing means (9).
  12. Lift installation (1) according to claim 11, wherein the actuator (8) is controlled by a safety control (11) and the safety control (11) in the case of excess speed of the lift installation (1) or in the case of unintended movement of the lift cage (2) from a stopping position activates the actuator (8) in order to actuate the at least one pair of safety brakes (10).
EP13799596.5A 2012-12-13 2013-12-05 Catch device for a lift system Not-in-force EP2931641B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13799596.5A EP2931641B1 (en) 2012-12-13 2013-12-05 Catch device for a lift system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12196968 2012-12-13
EP13799596.5A EP2931641B1 (en) 2012-12-13 2013-12-05 Catch device for a lift system
PCT/EP2013/075730 WO2014090689A1 (en) 2012-12-13 2013-12-05 Catch device for an elevator system

Publications (2)

Publication Number Publication Date
EP2931641A1 EP2931641A1 (en) 2015-10-21
EP2931641B1 true EP2931641B1 (en) 2017-01-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13799596.5A Not-in-force EP2931641B1 (en) 2012-12-13 2013-12-05 Catch device for a lift system

Country Status (5)

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US (1) US9745171B2 (en)
EP (1) EP2931641B1 (en)
CN (1) CN104837758B (en)
ES (1) ES2622712T3 (en)
WO (1) WO2014090689A1 (en)

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Publication number Publication date
WO2014090689A1 (en) 2014-06-19
US20150321883A1 (en) 2015-11-12
EP2931641A1 (en) 2015-10-21
ES2622712T3 (en) 2017-07-07
CN104837758B (en) 2017-04-12
CN104837758A (en) 2015-08-12
US9745171B2 (en) 2017-08-29

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