EP1646575A1 - Cable brake - Google Patents

Cable brake

Info

Publication number
EP1646575A1
EP1646575A1 EP04763319A EP04763319A EP1646575A1 EP 1646575 A1 EP1646575 A1 EP 1646575A1 EP 04763319 A EP04763319 A EP 04763319A EP 04763319 A EP04763319 A EP 04763319A EP 1646575 A1 EP1646575 A1 EP 1646575A1
Authority
EP
European Patent Office
Prior art keywords
brake
brake shoe
linear drive
cable
rope
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.)
Granted
Application number
EP04763319A
Other languages
German (de)
French (fr)
Other versions
EP1646575B1 (en
Inventor
Günter REUTER
Walter Nübling
Wolfgang Meissner
Helmut Schlecker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TK Elevator GmbH
Original Assignee
ThyssenKrupp Elevator AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Elevator AG filed Critical ThyssenKrupp Elevator AG
Publication of EP1646575A1 publication Critical patent/EP1646575A1/en
Application granted granted Critical
Publication of EP1646575B1 publication Critical patent/EP1646575B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B66B5/24—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 acting on guide ropes or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/16—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes for action on ropes or cables
    • 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
    • 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

Definitions

  • the invention relates to a rope brake for an elevator system for braking a rope coupled to a car, with a stop that is immobile in the longitudinal direction of the rope and at least one brake shoe, the rope being able to be passed between the stop and the brake shoe and the brake shoe between a rope pressing the rope against the stop Brake position and a release division releasing the rope can be moved back and forth, and with a drive coupled to the brake shoe for releasing the rope.
  • Such rope brakes are known from EP 0 708 051 AI.
  • a rope coupled to a counterweight of the elevator system which is held on the car which can be moved up and down along a roadway, can be reliably braked by the at least one movably arranged brake shoe assuming its braking position and thereby pressing the rope against the stop becomes.
  • an electric motor is used in the rope brake known from EP 0 708 051 AI, which is coupled to a shaft via a chain hoist and a magnetic coupling, to which one end of a fixed spiral spring is fixed and which is operatively connected via a thread to a displaceable and non-rotatable piston on which the movable brake shoe is held.
  • a rotary drive is provided which sets the shaft in rotation so that the coil spring is tensioned and at the same time the brake shoe is transferred into its release division. If the cable is to be braked, the magnetic coupling is released, thereby interrupting the operative connection between the rotary drive and the shaft. This has the consequence that the Coil spring relaxes, whereby the shaft is rotated and thereby the brake shoe is moved in the direction of the stop, so that the rope is pressed against the stop.
  • the actual braking force is generated by a spring force which acts on the stop which is immobile in the longitudinal direction of the rope but movable in the transverse direction of the rope. This requires an additional path for the movable brake shoe, which must be covered, since the stop which can be moved in the transverse direction of the cable can retract until the braking force is built up.
  • the rope brake known from EP 0 708 051 AI has a structurally complex structure with a large number of components. This causes the rope brake to be susceptible to malfunction.
  • the braking process that can be achieved by means of the rope brake is relatively slow, since a not inconsiderable time is required in order to be able to brake the rope effectively by turning the thread after the rope brake has been triggered.
  • the object of the present invention is to develop a rope brake of the type mentioned in such a way that it has a structurally simpler structure and with the aid of which the rope can be braked within a shorter time.
  • the brake shoe is permanently subjected to a braking force in its braking position, and the brake shoe can counteract the effect of the braking force be transferred to their release position by means of the linear drive.
  • the brake shoe takes up its braking position in a very short time after the cable brake has been triggered, in which it presses the cable against the stop, so that the cable can be braked within a short time.
  • the brake shoe is acted upon in addition to the braking force acting on it with an operating force counteracting the braking force of the linear drive, so that it can be transferred into its release position under the action of the operating force.
  • a linear drive enables a simple construction of the cable brake, which can be used, for example, to brake the suspension cables of an elevator system. It can also be provided that such a cable brake can be used to brake a cable of the elevator system coupled to a speed limiter within a very short time.
  • the construction according to the invention also has the advantage that the function of the cable brake can be checked automatically, for example with each car stop. To do this, it is only necessary to move the brake shoe successively into its two end positions, that is to say into its braking position and into its release position, when the car is stationary, and to electrically check the switching positions of at least one position switch corresponding to the end positions of the brake shoe.
  • the method for testing the rope brake according to the invention is explained in more detail below.
  • the at least one brake shoe can be moved back and forth between its braking position and its release position by means of the linear drive.
  • the brake shoe can be transferred not only from its braking position to its release position by means of the linear drive, but under the action of the linear drive the brake shoe can also be subjected to a controlled movement starting from its release position into its braking position.
  • the linear drive can be used in a wide variety of configurations; it can be designed, for example, as an electrical, hydraulic or pneumatic drive, in particular as a linear motor or as a piston-cylinder unit. It is advantageous if the linear drive is designed as a threaded spindle or screw drive. This enables the rope brake to be constructed in a structurally particularly simple and inexpensive manner.
  • the at least one brake shoe is coupled to the linear drive via a pivoted pivot lever.
  • a one-armed pivot lever or a two-armed pivot lever can be provided.
  • the use of a pivot lever enables a power transmission in such a way that a large braking force can be applied to the brake shoe in its braking position, while only a relatively small actuating force has to be provided by the linear actuator in order to be able to transfer the brake shoe into its release position despite the effective braking force.
  • the cable brake comprises a spring element which applies the braking force to the at least one brake shoe in its braking position.
  • the spring element is preferably designed as a spring with a linear characteristic curve, so that the spring element acts on the brake shoe with a braking force proportional to the spring travel.
  • the spring element can for example be designed as a plate spring or helical spring.
  • the spring element interacts with the at least one brake shoe via a pivotably mounted pivot lever.
  • the use of a one-armed or two-armed pivot lever, which is arranged between the spring element and the brake shoe has the advantage that a very high braking force can be exerted on the brake shoe even when a relatively low spring force is provided. It is also advantageous here that the braking force is built up on the side of the brake shoe and not on the side of the stop, since the deflection of the rope to be braked can be kept small by a fixed and non-yielding stop.
  • both the spring element and the linear drive are coupled to the at least one brake shoe via the pivoting lever.
  • the pivoting lever is used, via which the brake shoe can be acted upon both by the actuating force provided by the linear drive and by the spring force provided by the spring element. It is advantageous here if the spring element and the linear drive are arranged in alignment with one another.
  • the spring element is coupled to the pivot lever via a force transmission element, for example a rod, which is aligned with the linear drive.
  • the force transmission member can be hinged to the pivot lever.
  • the at least one brake shoe is coupled to the linear drive via an electromagnet and an armature assigned to it.
  • the rope brake it is then only necessary to to switch off the excitation current of the electromagnet in order to separate the brake shoe from the linear drive, so that the actuating force provided by the linear drive is eliminated and the brake shoe changes into its braking position within a very short time due to the spring force acting on it.
  • the electromagnet and the armature are arranged between the pivoting lever coupled to the at least one brake shoe and the linear drive.
  • the electric motor and the armature of the movable brake shoe are arranged immediately adjacent.
  • the armature or the electromagnet is articulated on the swivel lever.
  • the rope brake can be designed to run particularly smoothly, wherein the frictional forces that occur between the individual components of the rope brake can be kept low.
  • the electromagnet and / or the armature are kept linearly displaceable.
  • the electromagnet and / or the armature can be moved linearly by means of the linear drive. This makes it possible to move the armature and / or the electromagnet by means of the linear drive, so that the distance between the electromagnet and the armature can be adjusted by means of the linear drive.
  • the electromagnet and / or the armature are preferably movably held on a stationary stand on which the linear motor and the spring element are arranged.
  • the stand can form a base of the cable brake which can be fixed in the shaft of the elevator system or in its machine room and which carries the linear motor and the spring element and has a guide for the movably held electromagnet or the movably held armature.
  • the linear drive itself can be designed with a releasable connecting element, for example a clutch.
  • an elastic member is arranged between the linear drive and the electromagnet or the armature. This enables an elastic attachment of the electromagnet or armature to the linear drive by means of a spring-loaded intermediate area. This makes it possible for the linear drive to always travel to the same point even if the rope becomes thinner over time or the braking surfaces wear down, without the switching paths of the linear drive having to be readjusted.
  • the linear drive can push the electromagnet and the armature together and then the linear drive can be switched off without any tension.
  • the position of an actuating element of the linear drive, a force transmission element of the spring element and / or the position of the pivoting lever can be monitored by at least one sensor.
  • This can be a non-contact sensor, for example a reed contact or Hall sensor, but a sensor with contact can also be used.
  • at least one sensor is designed as an electrical, pneumatic or hydraulic position switch.
  • An electrical switch for example, can be used as a position switch Switching contact are used, which can be actuated by means of a switching plunger.
  • the switching plunger of an associated switching contact can be actuated by the actuating member, the power transmission member or the pivot lever.
  • the assumed switching position of the switching contact can then be checked electrically at any time in order in this way to determine the position of the assigned actuating element, power transmission element or swivel lever.
  • the invention also relates to a method for checking the functionality of a rope brake.
  • this is characterized in that, when the car is stationary, the movable brake shoe is brought into its two end positions one after the other and the switching positions of at least one position switch corresponding to the end positions of the brake shoe are electrically checked.
  • Such a function test can, for example, be carried out automatically by the elevator system for each car stop.
  • the at least one position switch can interact directly with the brake shoe, but it can also be provided that the position switch interacts with a component of the cable brake that is mechanically coupled to the brake shoe, for example with the pivoting lever or the force transmission element of the spring element.
  • the at least one brake shoe is preferably transferred to its two end positions by means of the linear drive, ie when the car is at a standstill, the brake shoe is subjected to a controlled movement by means of the linear drive, one after the other assuming its two end positions. In the end positions of the brake the respective switching positions of the at least one position switch can then be electrically checked.
  • the function of an interrupter unit connected to a power supply line of the electromagnet is preferably checked.
  • the cutoff of the excitation current of the electromagnet can be checked. H. it can be checked whether the electromagnet for braking the rope can be reliably switched off in the event of a fault in the elevator system.
  • the electromagnet is moved into its position corresponding to the release division of the brake shoe by means of the linear motor and the switching position of at least one position switch assigned to the swivel lever or the brake shoe is electrically checked. In this way, when a car is stopped, it can be determined whether the position of the brake shoe or the pivoting lever changes after the switched-off electromagnet is moved by the linear motor. If the rope brake works properly, the electromagnet should not be moved Change the location of the brake shoe and the swivel lever. If such a change in location is recognized on the basis of the switching position of the assigned position switches, then there is a fault in the cable brake.
  • the electromagnet is then moved back into its position corresponding to the braking position of the brake shoe, then the excitation current is again applied to the electromagnet and then move it again into its position corresponding to the release position of the brake shoe by means of the linear drive and electrically check the switching position of the position switch assigned to the swivel lever and / or the brake shoe.
  • the energized electromagnet is displaced by means of the linear drive and it is then checked whether the position of the brake shoe and / or the pivoting lever changes. With a proper rope brake, a change in the location of the brake shoe and the swivel lever must be detectable in this case, otherwise there is a fault.
  • Figure 1 is a schematic representation of a first embodiment of a rope brake according to the invention with a brake shoe in its release position
  • Figure 2 is a schematic representation corresponding to Figure 1 with the brake shoe in its braking position
  • Figure 3 is a schematic representation of a second embodiment of a rope brake according to the invention with a brake shoe in its release position and
  • Figure 4 a schematic representation corresponding to Figure 3 with the brake shoe in its braking position.
  • FIG. 1 and 2 schematically show a first embodiment of a rope brake according to the invention, which is generally designated by reference number 10.
  • This comprises a substantially L-shaped stand 12 with a first leg 13 and a second leg 14 which is held stationary in an elevator shaft or in the machine room of an elevator system.
  • a stop 16 is fixed to the free end of the first leg 13 and is to be braked parallel to one Rope 18 of the elevator system is aligned and carries a brake pad 20 on its front side facing the rope 18.
  • a jib 22 projects from the stop 16, on which a pivot lever 25 is articulated by means of a bearing 23 and can be pivoted about a pivot axis 26 oriented perpendicular to the longitudinal direction of the cable 18.
  • the cable 18 is passed between the stop 16 and the movable brake shoe 28 and can be braked by moving the brake shoe 28 by means of the swivel lever 25, starting from its release position shown in FIG. 1, into the braking position shown in FIG. 2, in which the brake shoe 28 the rope 18 presses against the brake pad 20 of the stop 16.
  • the second leg 14 of the stator 12 carries a linear drive 30 in the area of its free end. This can be, for example, an electric linear motor or also a hydraulic or pneumatic piston-cylinder unit.
  • the linear drive 30 has an actuating member 32 which can be moved in a straight line parallel to the second leg 14.
  • the actuator 32 can be designed, for example, in the form of a piston rod.
  • an elastic member 33 is arranged, via which the actuator 32 is coupled to an electromagnet 34, which is connected to a voltage source 38 via electrical power supply lines 35, 36.
  • An interrupter unit 40 is connected into the power supply line 35, with the aid of which the electrical connection between the voltage source 38 and the electromagnet 34 can be established and interrupted as required.
  • the electromagnet 34 interacts with an armature 42 which is articulated at the free end of the pivot lever 25 by means of a bearing 43.
  • armature 42 which is articulated at the free end of the pivot lever 25 by means of a bearing 43.
  • a force transmission member in the form of a brake spring rod 45 is articulated via the bearing 43 in addition to the armature 42, which is fixed with its end facing away from the bearing 43 to a brake spring 47 designed as a helical spring, which is held stationary on the stand 12.
  • the linear motor 30 and the brake spring rod 45 are aligned with one another, and by means of the brake spring 47, the pivot lever 25 is acted upon by the spring spring rod 45 with a spring force facing away from the linear motor 20, while from the linear motor 30 via the actuator 32, the elastic member 33, the electromagnet 34 and the armature 42 is exerted on the swivel lever 25 an operating force counteracting the brake spring 47, which thus counteracts the spring force.
  • the pivot position assumed by the pivot lever 25 in the release position and the braking position of the brake shoe 28 is in each case detected by an electrical position switch 49 or 51.
  • the two position switches 49, 51 each have a switching cam 52 or 53, to which the pivot lever 25 can be placed and because of which the respective position switch 49 or 51 changes its switching position.
  • the switching position of the position switches 49 and 51 can be electrically monitored in the usual way via signal lines which are known per se and are therefore not shown in the drawing in order to achieve a better overview.
  • the electromagnet 34 is held on the second leg 14 of the stand 12 so as to be displaceable in the longitudinal direction of the second leg 14 by means of a guide device 55 which is known per se and is therefore only shown schematically in the drawing.
  • the electrical supply line 35 can be interrupted by means of the interrupter unit 40, i. H. the excitation current of the electromagnet 34 can be switched off.
  • the electromagnet 34 releases the armature plate 42, and this in turn causes the pivoting lever 25 to be pivoted due to the spring force permanently exerted on it by the brake spring 47 such that the movable brake shoe 28 moves the cable 18 against the brake pad 20 of the stop 16 presses.
  • the pivot position of the pivot lever 25 corresponding to the braking position of the movable brake shoe 28 can then be checked by means of the electrical position switch 51.
  • the displaceably mounted electromagnet 34 can be moved in the direction of the armature 42 by means of the actuating member 32 and at the same time
  • the excitation current of the electromagnet 34 can be switched on again by means of the interrupter unit 40, so that the electromagnet 34, which is approached to the armature 42, exerts a magnetic holding force on the armature 42.
  • the electromagnet 42 can be acted upon by the actuating element 32 with an actuating force which counteracts the spring force of the brake spring 47 and exceeds it, so that the electromagnet 34 is displaced back along the guide device 55, the pivot lever 25 being pivoted at the same time so that the movable brake shoe 28 can be moved Approval division occupies.
  • This is shown in Figure 1.
  • the swivel position of the swivel lever 25 corresponding to the release division of the brake shoe 28 can be checked by means of the electrical position switch 49.
  • the functionality of the cable brake 10 can be checked, for example, on the occasion of a car hold, by the linear drive 30 displacing the electromagnet 34 in the direction of the brake spring 47 until the electrical position switch 51 is actuated and consequently the pivot lever 25 and its pivot position corresponding to the brake position of the brake shoe 28 occupies.
  • the electromagnet 34 can then be switched currentless by means of the interrupter unit 40 and the currentless state of the magnet can be checked.
  • the electroless electromagnet 34 can then be displaced by the linear drive 30 in the direction facing away from the brake spring 47 and it can then be checked whether the electrical position switch 51 changes its switching position.
  • FIGS. 3 and 4 schematically show a second embodiment of a rope brake according to the invention, which is generally designated by reference numeral 60.
  • This is largely identical in construction to the rope brake 10 explained above with reference to FIGS. 1 and 2.
  • the same reference numerals are therefore used in FIGS. 3 and 4 as in FIGS. 1 and 2. To avoid repetitions In this regard, full reference is made to the above statements.
  • the cable brake 60 also has a stationary stand 12 which is essentially L-shaped and comprises a first leg 13 and a second leg 14.
  • the cable 18 to be braked is in turn passed between a stop 16, which is held immovably in the longitudinal direction of the cable 18 on the first leg 13 and has a brake pad 20, and a movable brake shoe 28.
  • a one-armed swivel arm 25 is used in the rope brake 10 shown in FIGS. 1 and 2, on which the movable brake shoe 28 is articulated between the bearings 23 and 43, the rope brake shown in FIGS.
  • Brake 60 a two-armed pivot lever 62 for use, which is approximately L-shaped and includes a long first lever arm 64 and a short second lever arm 63.
  • a bracket 22 projecting from the stop 16 is in turn used, which carries a bearing 23 for mounting the pivot lever 62.
  • the movable brake shoe 28 is held at the free end of the second lever arm 63 by means of a bearing 66, and the armature 42 of the cable brake 60, like the free end of the brake spring rod 45, is articulated by means of a bearing 67 on the free end of the first lever arm 64.
  • the armature 42 interacts with an electromagnet 34, which can be moved by means of a linear drive 30 parallel to the longitudinal direction of the cable 18 via a guide device 55.
  • the pivoting lever 62 is permanently acted upon by the brake spring 47 with a spring force which is directed against the actuating force exerted by the linear motor 30 in the release division of the movable brake shoe 28 on the pivoting lever 62 via the electromagnet 34 and the armature 42.
  • the linear motor 30, the brake spring rod 45 and the brake spring 47 are also aligned with one another in the cable brake 60. In contrast to the rope brake 10, however, they are arranged parallel to the longitudinal direction of the rope 18.
  • the cable brake 60 therefore has a particularly narrow design, while the cable brake 10 shown in FIGS. 1 and 2 has a wide but short design with respect to the longitudinal direction of the cable 18.
  • the function of the cable brake 60 can be checked automatically, for example on the occasion of a car stop, in that the magnet 34 is pushed back and forth by means of the linear drive 30 and the pivot position assumed by the pivot lever 62 is checked by means of the electrical position switches 49 and 51.

Landscapes

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

Abstract

A rope brake for an elevator installation for braking a rope coupled to a car is provided, which has a stop that is immovable in the longitudinal direction of the rope and at least one brake shoe. The rope is led between the stop and the brake shoe, and the brake shoe is adapted to be moved back and forth between a braking position, pressing the rope against the stop, and a release position, releasing the rope. A drive coupled to the brake shoe is provided for releasing the rope. The drive is formed as a linear drive and the at least one brake shoe can be transferred by means of the linear drive into its release position against the action of a braking force acting on it in the braking position. Methods for testing a rope brake for an elevator car having a movable brake shoe are also provided.

Description

Seilbremse cable brake
Die Erfindung betrifft eine Seilbremse für eine Aufzuganlage zum Abbremsen eines mit einem Fahrkorb gekoppelten Seiles, mit einem in Seillängsrichtung unbeweglichen Anschlag und mindestens einer Bremsbacke, wobei das Seil zwischen dem Anschlag und der Bremsbacke hindurchführbar ist und die Bremsbacke zwischen einer das Seil gegen den Anschlag pressenden Bremsstellung und einer das Seil freigebenden Freigabesteilung hin- und herbewegbar ist, und mit einem mit der Bremsbacke gekoppelten Antrieb zum Freigeben des Seiles.The invention relates to a rope brake for an elevator system for braking a rope coupled to a car, with a stop that is immobile in the longitudinal direction of the rope and at least one brake shoe, the rope being able to be passed between the stop and the brake shoe and the brake shoe between a rope pressing the rope against the stop Brake position and a release division releasing the rope can be moved back and forth, and with a drive coupled to the brake shoe for releasing the rope.
Derartige Seilbremsen sind aus der EP 0 708 051 AI bekannt. Mit ihrer Hilfe läßt sich beispielsweise ein mit einem Gegengewicht der Aufzuganlage gekoppeltes Seil, das an dem entlang einer Fahrbahn aufwärts und abwärts verfahrbaren Fahrkorb gehalten ist, zuverlässig abbremsen, indem die mindestens eine beweglich angeordnete Bremsbacke ihre Bremsstellung einnimmt und dadurch das Seil gegen den Anschlag gepresst wird. Zum Überführen der Bremsbacke in ihre Freigabestellung kommt bei der aus der EP 0 708 051 AI bekannten Seilbremse ein Elektromotor zum Einsatz, der über einen Kettenzug und eine Magnetkupplung mit einer Welle gekoppelt ist, an der ein Ende einer anderenends ortsfest gehaltenen Spiralfeder festgelegt ist und die über ein Gewinde mit einem verschiebbar und drehfest gehaltenen Kolben in Wirkverbindung steht, an dem die bewegliche Bremsbacke gehalten ist. Mittels des Elektromotors wird ein Drehantrieb bereitgestellt, der die Welle in Drehung versetzt, so daß die Spiralfeder gespannt und gleichzeitig die Bremsbacke in ihre Freigabesteilung überführt wird. Soll das Seil abgebremst werden, so wird die Magnetkupplung gelöst und dadurch die Wirkverbindung zwischen dem Drehantrieb und der Welle unterbrochen. Dies hat dann zur Folge, daß sich die Spiralfeder entspannt, wobei die Welle in Drehung versetzt und dadurch die Bremsbacke in Richtung des Anschlages bewegt wird, so daß das Seil gegen den Anschlag gepresst wird. Die eigentliche Bremskraft wird durch eine Federkraft erzeugt, die an dem in Seillängsrichtung unbeweglichen, in Seilquerrichtung jedoch beweglichen Anschlag angreift. Dies erfordert für die bewegliche Bremsbacke einen zusätzlichen Weg, der zurückgelegt werden muß, da der in Seilquerrichtung verschiebbare Anschlag bis zum Aufbau der Bremskraft zurückweichen kann.Such rope brakes are known from EP 0 708 051 AI. With their help, for example, a rope coupled to a counterweight of the elevator system, which is held on the car which can be moved up and down along a roadway, can be reliably braked by the at least one movably arranged brake shoe assuming its braking position and thereby pressing the rope against the stop becomes. To transfer the brake shoe to its release position, an electric motor is used in the rope brake known from EP 0 708 051 AI, which is coupled to a shaft via a chain hoist and a magnetic coupling, to which one end of a fixed spiral spring is fixed and which is operatively connected via a thread to a displaceable and non-rotatable piston on which the movable brake shoe is held. By means of the electric motor, a rotary drive is provided which sets the shaft in rotation so that the coil spring is tensioned and at the same time the brake shoe is transferred into its release division. If the cable is to be braked, the magnetic coupling is released, thereby interrupting the operative connection between the rotary drive and the shaft. This has the consequence that the Coil spring relaxes, whereby the shaft is rotated and thereby the brake shoe is moved in the direction of the stop, so that the rope is pressed against the stop. The actual braking force is generated by a spring force which acts on the stop which is immobile in the longitudinal direction of the rope but movable in the transverse direction of the rope. This requires an additional path for the movable brake shoe, which must be covered, since the stop which can be moved in the transverse direction of the cable can retract until the braking force is built up.
Die aus der EP 0 708 051 AI bekannte Seilbremse weist einen konstruktiv aufwendigen Aufbau auf mit einer Vielzahl von Bauteilen. Dies bewirkt eine Störungsanfälligkeit der Seilbremse. Außerdem ist der mittels der Seilbremse erzielbare Bremsvorgang relativ langsam, da eine nicht unerhebliche Zeit erforderlich ist, um nach Auslösung der Seilbremse das Seil über die Drehung im Gewinde wirkungsvoll abbremsen zu können.The rope brake known from EP 0 708 051 AI has a structurally complex structure with a large number of components. This causes the rope brake to be susceptible to malfunction. In addition, the braking process that can be achieved by means of the rope brake is relatively slow, since a not inconsiderable time is required in order to be able to brake the rope effectively by turning the thread after the rope brake has been triggered.
Aufgabe der vorliegenden Erfindung ist es, eine Seilbremse der eingangs genannten Art derart weiterzubilden, daß sie einen konstruktiv einfacheren Aufbau aufweist und mit ihrer Hilfe das Seil innerhalb kürzerer Zeit abgebremst werden kann.The object of the present invention is to develop a rope brake of the type mentioned in such a way that it has a structurally simpler structure and with the aid of which the rope can be braked within a shorter time.
Diese Aufgabe wird bei einer Seilbremse der gattungsgemäßen Art erfindungsgemäß dadurch gelöst, daß der Antrieb als Linearantrieb ausgestaltet ist und die Bremsbacke entgegen der Wirkung einer in der Bremsstellung auf sie einwirkenden Bremskraft mittels des Linearantriebs in ihre Freigabestellung überführbar ist.This object is achieved according to the invention in a rope brake of the generic type in that the drive is designed as a linear drive and the brake shoe can be converted into its release position by means of the linear drive against the effect of a braking force acting on it in the braking position.
Die Bremsbacke wird in ihrer Bremsstellung permanent mit einer Bremskraft beaufschlagt, und entgegen der Wirkung der Bremskraft kann die Bremsbacke mittels des Linearantriebes in ihre Freigabestellung überführt werden. Dies hat zur Folge, daß die Bremsbacke nach Auslösen der Seilbremse innerhalb sehr kurzer Zeit ihre Bremsstellung einnimmt, in der sie das Seil gegen den Anschlag presst, so daß das Seil innerhalb kurzer Zeit abgebremst werden kann. Zum Freigeben des Seiles wird die Bremsbacke zusätzlich zu der auf sie einwirkenden Bremskraft mit einer der Bremskraft entgegenwirkenden Betätigungskraft des Linearantriebes beaufschlagt, so daß sie unter der Wirkung der Betätigungskraft in ihre Freigabestellung überführt werden kann. Der Einsatz eines Linearantriebes ermöglicht hierbei einen konstruktiv einfachen Aufbau der Seilbremse, die beispielsweise zum Abbremsen der Tragseile einer Aufzuganlage zum Einsatz kommen kann. Es kann auch vorgesehen sein, mittels einer derartigen Seilbremse ein mit einem Geschwindigkeitsbegrenzer gekoppeltes Seil der Aufzuganlage innerhalb sehr kurzer Zeit abzubremsen.The brake shoe is permanently subjected to a braking force in its braking position, and the brake shoe can counteract the effect of the braking force be transferred to their release position by means of the linear drive. As a result, the brake shoe takes up its braking position in a very short time after the cable brake has been triggered, in which it presses the cable against the stop, so that the cable can be braked within a short time. To release the rope, the brake shoe is acted upon in addition to the braking force acting on it with an operating force counteracting the braking force of the linear drive, so that it can be transferred into its release position under the action of the operating force. The use of a linear drive enables a simple construction of the cable brake, which can be used, for example, to brake the suspension cables of an elevator system. It can also be provided that such a cable brake can be used to brake a cable of the elevator system coupled to a speed limiter within a very short time.
Die erfindungsgemäße Konstruktion hat außerdem den Vorteil, daß die Seilbremse selbsttätig, beispielsweise bei jedem Fahrkorbhalt, auf ihre Funktion überprüft werden kann. Hierzu ist es lediglich erforderlich, bei stehendem Fahrkorb die Bremsbacke nacheinander in ihre beiden Endstellungen, also in ihre Bremsstellung und in ihre Freigabestellung, zu überführen und den Endstellungen der Bremsbacke entsprechende Schaltstellungen zumindest eines Stellungsschalters elektrisch zu überprüfen. Das Verfahren zur Prüfung der erfindungsgemäßen Seilbremse wird nachstehend noch näher erläutert.The construction according to the invention also has the advantage that the function of the cable brake can be checked automatically, for example with each car stop. To do this, it is only necessary to move the brake shoe successively into its two end positions, that is to say into its braking position and into its release position, when the car is stationary, and to electrically check the switching positions of at least one position switch corresponding to the end positions of the brake shoe. The method for testing the rope brake according to the invention is explained in more detail below.
Von besonderem Vorteil ist es, wenn die mindestens eine Bremsbacke mittels des Linearantriebs zwischen ihrer Bremsstellung und ihrer Freigabestellung hin- und herbewegbar ist. In diesem Falle kann die Bremsbacke mittels des Linearantriebes nicht nur ausgehend von ihrer Bremsstellung in ihre Freigabestellung überführt werden, sondern unter der Wirkung des Linearantriebes kann die Bremsbacke auch einer kontrollierten Bewegung unterworfen werden ausgehend von ihrer Freigabestellung in ihre Bremsstellung.It is particularly advantageous if the at least one brake shoe can be moved back and forth between its braking position and its release position by means of the linear drive. In this case, the brake shoe can be transferred not only from its braking position to its release position by means of the linear drive, but under the action of the linear drive the brake shoe can also be subjected to a controlled movement starting from its release position into its braking position.
Der Linearantrieb kann in unterschiedlichster Ausgestaltung zum Einsatz kommen, er kann beispielsweise als elektrischer, hydraulischer oder pneumatischer Antrieb ausgestaltet sein, insbesondere als Linearmotor oder als Kolben- Zylinderaggregat. Von Vorteil ist es, wenn der Linearantrieb als Gewindespindel- oder Schraubantrieb ausgestaltet ist. Dies ermöglicht einen konstruktiv besonders einfachen und kostengünstig herstellbaren Aufbau der Seilbremse.The linear drive can be used in a wide variety of configurations; it can be designed, for example, as an electrical, hydraulic or pneumatic drive, in particular as a linear motor or as a piston-cylinder unit. It is advantageous if the linear drive is designed as a threaded spindle or screw drive. This enables the rope brake to be constructed in a structurally particularly simple and inexpensive manner.
Bei einer bevorzugten Ausführungsform ist die mindestens eine Bremsbacke über einen schwenkbar gelagerten Schwenkhebel mit dem Linearantrieb gekoppelt. Hierbei kann ein einarmiger Schwenkhebel oder auch ein zweiarmiger Schwenkhebel vorgesehen sein. Der Einsatz eines Schwenkhebels ermöglicht eine Kraftübertragung in der Art, daß die Bremsbacke in ihrer Bremsstellung mit einer großen Bremskraft beaufschlagbar ist, während vom Linearantπeb nur eine verhältnismäßig geringe Betätigungskraft bereitgestellt werden muß, um die Bremsbacke trotz der wirksamen Bremskraft in ihre Freigabestellung überführen zu können.In a preferred embodiment, the at least one brake shoe is coupled to the linear drive via a pivoted pivot lever. Here, a one-armed pivot lever or a two-armed pivot lever can be provided. The use of a pivot lever enables a power transmission in such a way that a large braking force can be applied to the brake shoe in its braking position, while only a relatively small actuating force has to be provided by the linear actuator in order to be able to transfer the brake shoe into its release position despite the effective braking force.
Als günstig hat es sich erwiesen, wenn die Seilbremse ein Federelement umfaßt, das die mindestens eine Bremsbacke in ihrer Bremsstellung mit der Bremskraft beaufschlagt. Vorzugsweise ist das Federelement als Feder mit linearer Kennlinie ausgebildet, so daß das Federelement die Bremsbacke mit einer zum Federweg proportionalen Bremskraft beaufschlagt. Das Federelement kann beispielsweise als Tellerfeder oder Schraubenfeder ausgestaltet sein. Bei einer bevorzugten Ausführungsform wirkt das Federelement über einen schwenkbar gelagerten Schwenkhebel mit der mindestens einen Bremsbacke zusammen. Der Einsatz eines einarmigen oder zweiarmigen Schwenkhebels, der zwischen dem Federelement und der Bremsbacke angeordnet ist, hat den Vorteil, daß selbst bei Bereitstellung einer verhältnismäßig geringen Federkraft eine sehr hohe Bremskraft auf die Bremsbacke ausgeübt werden kann. Von Vorteil ist hierbei auch, daß die Bremskraft auf der Seite der Bremsbacke aufgebaut wird und nicht auf der Seite des Anschlages, da durch einen feststehenden und nicht nachgebenden Anschlag der Auslenkweg des abzubremsenden Seiles gering gehalten werden kann.It has proven to be favorable if the cable brake comprises a spring element which applies the braking force to the at least one brake shoe in its braking position. The spring element is preferably designed as a spring with a linear characteristic curve, so that the spring element acts on the brake shoe with a braking force proportional to the spring travel. The spring element can for example be designed as a plate spring or helical spring. In a preferred embodiment, the spring element interacts with the at least one brake shoe via a pivotably mounted pivot lever. The use of a one-armed or two-armed pivot lever, which is arranged between the spring element and the brake shoe, has the advantage that a very high braking force can be exerted on the brake shoe even when a relatively low spring force is provided. It is also advantageous here that the braking force is built up on the side of the brake shoe and not on the side of the stop, since the deflection of the rope to be braked can be kept small by a fixed and non-yielding stop.
Bei einer konstruktiv besonders einfachen Ausgestaltung ist vorgesehen, daß über den Schwenkhebel sowohl das Federelement als auch der Linearantrieb mit der mindestens einen Bremsbacke gekoppelt sind. Es kommt somit lediglich ein einziger Schwenkhebel zum Einsatz, über den die Bremsbacke sowohl mit der vom Linearantrieb bereitgestellten Betätigungskraft als auch mit der vom Federelement bereitgestellten Federkraft beaufschlagbar ist. Günstig ist es hierbei, wenn das Federelement und der Linearantrieb fluchtend zueinander angeordnet sind.In a particularly simple construction, it is provided that both the spring element and the linear drive are coupled to the at least one brake shoe via the pivoting lever. Thus, only a single pivot lever is used, via which the brake shoe can be acted upon both by the actuating force provided by the linear drive and by the spring force provided by the spring element. It is advantageous here if the spring element and the linear drive are arranged in alignment with one another.
So kann beispielsweise vorgesehen sein, daß das Federelement über ein fluchtend zum Linearantrieb ausgerichtetes Kraftübertragungsglied, beispielsweise eine Stange, mit dem Schwenkhebel gekoppelt ist. Das Kraftübertragungsglied kann hierbei an den Schwenkhebel angelenkt sein.For example, it can be provided that the spring element is coupled to the pivot lever via a force transmission element, for example a rod, which is aligned with the linear drive. The force transmission member can be hinged to the pivot lever.
Um die Auslösung der erfindungsgemäßen Seilbremse zusätzlich zu beschleunigen, ist es von Vorteil, wenn die mindestens eine Bremsbacke über einen Elektromagneten und einen diesem zugeordneten Anker mit dem Linearantrieb gekoppelt ist. Zum Auslösen der Seilbremse ist es dann lediglich erforderlich, den Erregerstrom des Elektromagneten abzuschalten, um die Bremsbacke vom Linearantrieb zu trennen, so daß die vom Linearantrieb bereitgestellte Betätigungskraft entfällt und die Bremsbacke innerhalb sehr kurzer Zeit aufgrund der auf sie einwirkenden Federkraft in ihre Bremsstellung übergeht.In order to additionally accelerate the triggering of the rope brake according to the invention, it is advantageous if the at least one brake shoe is coupled to the linear drive via an electromagnet and an armature assigned to it. To activate the rope brake, it is then only necessary to to switch off the excitation current of the electromagnet in order to separate the brake shoe from the linear drive, so that the actuating force provided by the linear drive is eliminated and the brake shoe changes into its braking position within a very short time due to the spring force acting on it.
Als günstig hat es sich erwiesen, wenn der Elektromagnet und der Anker zwischen dem mit der mindestens einen Bremsbacke gekoppelten Schwenkhebel und dem Linearantrieb angeordnet sind. Alternativ kann vorgesehen sein, daß der Elektromotor und der Anker der beweglichen Bremsbacke unmittelbar benachbart angeordnet sind.It has proven to be advantageous if the electromagnet and the armature are arranged between the pivoting lever coupled to the at least one brake shoe and the linear drive. Alternatively, it can be provided that the electric motor and the armature of the movable brake shoe are arranged immediately adjacent.
Von Vorteil ist es, wenn der Anker oder der Elektromagnet am Schwenkhebel angelenkt ist. Die Seilbremse kann dadurch besonders leichtgängig ausgebildet werden, wobei auftretende Reibungskräfte zwischen den einzelnen Bauteilen der Seilbremse gering gehalten werden können.It is advantageous if the armature or the electromagnet is articulated on the swivel lever. As a result, the rope brake can be designed to run particularly smoothly, wherein the frictional forces that occur between the individual components of the rope brake can be kept low.
Bei einer bevorzugten Ausführungsform sind der Elektromagnet und/oder der Anker linear verschiebbar gehalten. So kann beispielsweise vorgesehen sein, daß der Elektromagnet und/oder der Anker mittels des Linearantriebes linear verfahrbar sind. Dies ermöglicht es, den Anker und/oder den Elektromagneten mittels des Linearantriebes zu verschieben, so daß der Abstand zwischen dem Elektromagnet und dem Anker mittels des Linearantriebes einstellbar ist.In a preferred embodiment, the electromagnet and / or the armature are kept linearly displaceable. For example, it can be provided that the electromagnet and / or the armature can be moved linearly by means of the linear drive. This makes it possible to move the armature and / or the electromagnet by means of the linear drive, so that the distance between the electromagnet and the armature can be adjusted by means of the linear drive.
Vorzugsweise sind der Elektromagnet und/oder der Anker an einem ortsfesten Ständer verfahrbar gehalten, an dem der Linearmotor und das Federelement angeordnet sind. Der Ständer kann eine im Schacht der Aufzuganlage oder in deren Maschinenraum festlegbare Basis der Seilbremse ausbilden, die den Linearmotor und das Federelement trägt und eine Führung aufweist für den verfahrbar gehaltenen Elektromagneten bzw. den verfahrbar gehaltenen Anker.The electromagnet and / or the armature are preferably movably held on a stationary stand on which the linear motor and the spring element are arranged. The stand can form a base of the cable brake which can be fixed in the shaft of the elevator system or in its machine room and which carries the linear motor and the spring element and has a guide for the movably held electromagnet or the movably held armature.
Statt Verwendung eines Elektromagneten mit zugeordnetem Anker kann der Linearantrieb selbst mit einem lösbaren Verbindungselement, zum Beispiel einer Kupplung, ausgestaltet sein.Instead of using an electromagnet with an associated armature, the linear drive itself can be designed with a releasable connecting element, for example a clutch.
Von Vorteil ist es, wenn zwischen dem Linearantrieb und dem Elektromagneten oder dem Anker ein elastisches Glied angeordnet ist. Dies ermöglicht eine elastische Befestigung des Elektromagneten oder Ankers am Linearantrieb mittels eines gefederten Zwischenbereiches. Damit wird ermöglicht, daß auch bei im Laufe der Zeit dünner werdendem Seil oder sich abnützenden Bremsflächen des Anschlages der Linearantrieb immer bis zur gleichen Stelle fahren kann, ohne daß die Schaltwege des Linearantriebs nachgestellt werden müssen. Mittels des elastischen Glieds kann der Linearantrieb den Elektromagneten und den Anker zusammenschieben und anschließend kann der Linearantrieb abgeschaltet werden, ohne daß sich Verspannungen ergeben.It is advantageous if an elastic member is arranged between the linear drive and the electromagnet or the armature. This enables an elastic attachment of the electromagnet or armature to the linear drive by means of a spring-loaded intermediate area. This makes it possible for the linear drive to always travel to the same point even if the rope becomes thinner over time or the braking surfaces wear down, without the switching paths of the linear drive having to be readjusted. By means of the elastic member, the linear drive can push the electromagnet and the armature together and then the linear drive can be switched off without any tension.
Günstig ist es, wenn der Schwenkhebel am Ständer schwenkbar gelagert ist.It is favorable if the swivel lever is pivotably mounted on the stand.
Bei einer besonders bevorzugten Ausführungsform der erfindungsgemäßen Seilbremse ist die Stellung eines Betätigungsgliedes des Linearantriebes, eines Kraftübertragungsgliedes des Federelementes und/oder die Stellung des Schwenkhebels von mindestens einem Sensor überwachbar. Hierbei kann es sich um einen berührungslosen Sensor, beispielsweise um einen Reed-Kontakt oder Hallsensor, handeln, es kann jedoch auch ein berührungsbehafteter Sensor zum Einsatz kommen. Insbesondere kann vorgesehen sein, daß zumindest ein Sensor als elektrischer, pneumatischer oder hydraulischer Stellungsschalter ausgestaltet ist. Als Stellungsschalter kann zum Beispiel ein elektrischer Schaltkontakt zum Einsatz kommen, der mittels eines Schaltstößels betätigbar ist. Nimmt das Betätigungsglied, das Kraftübertragungsglied oder der Schwenkhebel eine Stellung ein, die einer Endstellung der Bremsbacke entspricht, so kann der Schaltstößel eines zugeordneten Schaltkontaktes vom Betätigungsglied, dem Kraftübertragungsglied oder dem Schwenkhebel betätigt werden. Die eingenommene Schaltstellung des Schaltkontaktes kann dann jederzeit elektrisch geprüft werden, um auf diese Weise die Stellung des zugeordneten Betätigungsgliedes, Kraftübertragungsgliedes oder Schwenkhebels zu bestimmen.In a particularly preferred embodiment of the rope brake according to the invention, the position of an actuating element of the linear drive, a force transmission element of the spring element and / or the position of the pivoting lever can be monitored by at least one sensor. This can be a non-contact sensor, for example a reed contact or Hall sensor, but a sensor with contact can also be used. In particular, it can be provided that at least one sensor is designed as an electrical, pneumatic or hydraulic position switch. An electrical switch, for example, can be used as a position switch Switching contact are used, which can be actuated by means of a switching plunger. If the actuating member, the power transmission member or the pivot lever assume a position which corresponds to an end position of the brake shoe, the switching plunger of an associated switching contact can be actuated by the actuating member, the power transmission member or the pivot lever. The assumed switching position of the switching contact can then be checked electrically at any time in order in this way to determine the position of the assigned actuating element, power transmission element or swivel lever.
Wie eingangs erwähnt, betrifft die Erfindung außerdem ein Verfahren zum Prüfen der Funktionsfähigkeit einer Seilbremse. Dieses zeichnet sich erfindungsgemäß dadurch aus, daß man bei stehendem Fahrkorb die bewegbare Bremsbacke nacheinander in ihre beiden Endstellungen bringt und den Endstellungen der Bremsbacke entsprechende Schaltstellungen zumindest eines Stellungsschalters elektrisch überprüft. Eine derartige Funktionsprüfung kann beispielsweise bei jedem Fahrkorbhalt von der Aufzuganlage selbsttätig durchgeführt werden. Der mindestens eine Stellungsschalter kann unmittelbar mit der Bremsbacke zusammenwirken, es kann allerdings auch vorgesehen sein, daß der Stellungsschalter mit einem mechanisch mit der Bremsbacke gekoppelten Bauteil der Seilbremse zusammenwirkt, beispielsweise mit dem Schwenkhebel oder dem Kraftübertragungsglied des Federelementes.As mentioned at the beginning, the invention also relates to a method for checking the functionality of a rope brake. According to the invention, this is characterized in that, when the car is stationary, the movable brake shoe is brought into its two end positions one after the other and the switching positions of at least one position switch corresponding to the end positions of the brake shoe are electrically checked. Such a function test can, for example, be carried out automatically by the elevator system for each car stop. The at least one position switch can interact directly with the brake shoe, but it can also be provided that the position switch interacts with a component of the cable brake that is mechanically coupled to the brake shoe, for example with the pivoting lever or the force transmission element of the spring element.
Vorzugsweise überführt man zum Prüfen der Funktionsfähigkeit der Seilbremse die mindestens eine Bremsbacke mittels des Linearantriebes in ihre beiden Endstellungen, d. h. bei stehendem Fahrkorb wird die Bremsbacke mittels des Linearantriebes einer kontrollierten Bewegung unterworfen, wobei sie nacheinander ihre beiden Endstellungen einnimmt. In den Endstellungen der Brems- backen können dann die jeweiligen Schaltstellungen des mindestens einen Stellungsschalters elektrisch überprüft werden.To check the functionality of the rope brake, the at least one brake shoe is preferably transferred to its two end positions by means of the linear drive, ie when the car is at a standstill, the brake shoe is subjected to a controlled movement by means of the linear drive, one after the other assuming its two end positions. In the end positions of the brake the respective switching positions of the at least one position switch can then be electrically checked.
Von Vorteil ist es, wenn man den Endstellungen der Bremsbacke entsprechende Schaltstellungen zumindest eines dem Schwenkhebel zugeordneten Stellungsschalters elektrisch überprüft. Es kann somit beispielsweise anläßlich eines Fahrkorbhaltes innerhalb kurzer Zeit geprüft werden, ob der Schwenkhebel seine Endstellungen einnehmen kann, die jeweils einer Endstellung der Bremsbacke entsprechen. Dies ermöglicht es, beispielsweise eine mechanische Blockade des Schwenkhebels ohne weiteres zu erkennen.It is advantageous if one electrically checks the switch positions corresponding to the end positions of the brake shoe of at least one position switch assigned to the swivel lever. It can thus be checked within a short time, for example on the occasion of a car stop, whether the pivot lever can assume its end positions, each of which corresponds to an end position of the brake shoe. This makes it possible, for example, to easily recognize a mechanical blockage of the pivoting lever.
Vorzugsweise prüft man in der Bremsstellung der mindestens einen Bremsbacke die Funktion einer in eine Stromversorgungsleitung des Elektromagneten geschalteten Unterbrechereinheit. Bei stehendem Fahrkorb kann somit, nachdem die ordnungsgemäße Bremsstellung der Bremsbacke direkt oder indirekt geprüft wurde, die Abschaltung des Erregerstromes des Elektromagneten überprüft werden, d. h. es kann geprüft werden, ob im Falle einer Störung der Aufzuganlage der Elektromagnet zum Abbremsen des Seiles zuverlässig abgeschaltet werden kann.In the braking position of the at least one brake shoe, the function of an interrupter unit connected to a power supply line of the electromagnet is preferably checked. When the car is stationary, after the correct braking position of the brake shoe has been checked directly or indirectly, the cutoff of the excitation current of the electromagnet can be checked. H. it can be checked whether the electromagnet for braking the rope can be reliably switched off in the event of a fault in the elevator system.
Von besonderem Vorteil ist es, wenn man den Elektromagneten, nachdem man dessen Erregerstrom abgeschaltet hat, mittels des Linearmotors in seine der Freigabesteilung der Bremsbacke entsprechende Stellung verfährt und die Schaltstellung zumindest eines dem Schwenkhebel oder der Bremsbacke zugeordneten Stellungsschalters elektrisch überprüft. Auf diese Weise kann anläßlich eines Fahrkorbhalts erfaßt werden, ob sich die Stellung der Bremsbacke oder des Schwenkhebels ändert, nachdem der abgeschaltete Elektromagnet vom Linearmotor verschoben wird. Bei ordnungsgemäß funktionierender Seilbremse sollte eine Verlagerung des abgeschalteten Elektromagneten keine Ortsveränderung der Bremsbacke und des Schwenkhebels zur Folge haben. Wird eine derartige Ortsveränderung anhand der Schaltstellung der zugeordneten Stellungsschalter erkannt, so liegt eine Störung der Seilbremse vor.It is particularly advantageous if, after the excitation current has been switched off, the electromagnet is moved into its position corresponding to the release division of the brake shoe by means of the linear motor and the switching position of at least one position switch assigned to the swivel lever or the brake shoe is electrically checked. In this way, when a car is stopped, it can be determined whether the position of the brake shoe or the pivoting lever changes after the switched-off electromagnet is moved by the linear motor. If the rope brake works properly, the electromagnet should not be moved Change the location of the brake shoe and the swivel lever. If such a change in location is recognized on the basis of the switching position of the assigned position switches, then there is a fault in the cable brake.
Bei einer besonders bevorzugten Ausführungsform des erfindungsgemäßen Prüfungsverfahrens ist vorgesehen, daß man den Elektromagneten, nachdem er im abgeschalteten Zustand vom Linearantrieb verschoben wurde, anschließend mittels des Linearantriebes wieder in seine der Bremsstellung der Bremsbacke entsprechende Stellung zurückverfährt, dann den Elektromagneten wieder mit dem Erregerstrom beaufschlagt und ihn danach mittels des Linearantriebes erneut in seine der Freigabestellung der Bremsbacke entsprechende Stellung verfährt und die Schaltstellung des dem Schwenkhebel und/oder der Bremsbacke zugeordneten Stellungsschalters elektrisch überprüft. Bei dieser vorteilhaften Ausführungsform des erfindungsgemäßen Prüfungsverfahrens wird also der erregte Elektromagnet mittels des Linearantriebes verschoben und es wird dann geprüft, ob sich die Stellung der Bremsbacke und/oder des Schwenkhebels verändert. Bei ordnungsgemäßer Seilbremse muß in diesem Falle eine Ortsveränderung der Bremsbacke und des Schwenkhebels erfaßbar sein, ansonsten liegt eine Störung vor.In a particularly preferred embodiment of the test method according to the invention, it is provided that after the linear actuator has been moved in the switched-off state, the electromagnet is then moved back into its position corresponding to the braking position of the brake shoe, then the excitation current is again applied to the electromagnet and then move it again into its position corresponding to the release position of the brake shoe by means of the linear drive and electrically check the switching position of the position switch assigned to the swivel lever and / or the brake shoe. In this advantageous embodiment of the test method according to the invention, the energized electromagnet is displaced by means of the linear drive and it is then checked whether the position of the brake shoe and / or the pivoting lever changes. With a proper rope brake, a change in the location of the brake shoe and the swivel lever must be detectable in this case, otherwise there is a fault.
Die nachfolgende Beschreibung zweier bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:The following description of two preferred embodiments of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:
Figur 1: eine schematische Darstellung einer ersten Ausführungsform einer erfindungsgemäßen Seilbremse mit einer Bremsbacke in ihrer Freigabestellung; Figur 2: eine schematische Darstellung entsprechend Figur 1 mit der Bremsbacke in ihrer Bremsstellung;Figure 1 is a schematic representation of a first embodiment of a rope brake according to the invention with a brake shoe in its release position; Figure 2 is a schematic representation corresponding to Figure 1 with the brake shoe in its braking position;
Figur 3: eine schematische Darstellung einer zweiten Ausführungsform einer erfindungsgemäßen Seilbremse mit einer Bremsbacke in ihrer Freigabestellung undFigure 3 is a schematic representation of a second embodiment of a rope brake according to the invention with a brake shoe in its release position and
Figur 4: eine schematische Darstellung entsprechend Figur 3 mit der Bremsbacke in ihrer Bremsstellung.Figure 4: a schematic representation corresponding to Figure 3 with the brake shoe in its braking position.
In den Figuren 1 und 2 ist schematisch eine insgesamt mit dem Bezugszeichen 10 belegte erste Ausführungsform einer erfindungsgemäßen Seilbremse dargestellt. Diese umfaßt einen ortsfest in einem Aufzugschacht oder im Maschinenraum einer Aufzuganlage gehaltenen, im wesentlichen L-förmigen Ständer 12 mit einem ersten Schenkel 13 und einem zweiten Schenkel 14. Am freien Ende des ersten Schenkels 13 ist ein Anschlag 16 festgelegt, der parallel zu einem abzubremsenden Seil 18 der Aufzuganlage ausgerichtet ist und auf seiner dem Seil 18 zugewandten Vorderseite einen Bremsbelag 20 trägt. Vom Anschlag 16 steht ein Ausleger 22 ab, an dem mittels eines Lagers 23 ein Schwenkhebel 25 angelenkt ist, der um eine senkrecht zur Längsrichtung des Seiles 18 ausgerichtete Schwenkachse 26 verschwenkbar ist. An dem Schwenkhebel 25 ist mittels eines Lagers 27 eine parallel zum Anschlag 16 ausgerichtete bewegliche Bremsbacke 28 angelenkt. Das Seil 18 ist zwischen dem Anschlag 16 und der beweglichen Bremsbacke 28 hindurchgeführt und kann abgebremst werden, indem die Bremsbacke 28 mittels des Schwenkhebels 25 ausgehend aus ihrer in Figur 1 dargestellten Freigabestellung in ihre in Figur 2 dargestellte Bremsstellung bewegt wird, in der die Bremsbacke 28 das Seil 18 gegen den Bremsbelag 20 des Anschlages 16 preßt. Der zweite Schenkel 14 des Ständers 12 trägt im Bereich seines freien Endes einen Linearantrieb 30. Hierbei kann es sich beispielsweise um einen elektrischen Linearmotor handeln oder auch um ein hydraulisches oder pneumatisches Kolben-Zylinderaggregat. Der Linearantrieb 30 weist ein von diesem geradlinig parallel zum zweiten Schenkel 14 bewegbares Betätigungsglied 32 auf. Das Betätigungsglied 32 kann beispielsweise in Form einer Kolbenstange ausgebildet sein. Am freien Ende des Betätigungsglieds 32 ist ein elastisches Glied 33 angeordnet, über das das Betätigungsglied 32 mit einem Elektromagneten 34 gekoppelt ist, der über elektrische Stromversorgungsleitungen 35, 36 an eine Spannungsquelle 38 angeschlossen ist. In die Stromversorgungsleitung 35 ist eine Unterbrechereinheit 40 geschaltet, mit deren Hilfe die elektrische Verbindung zwischen der Spannungsquelle 38 und dem Elektromagnet 34 bedarfsweise hergestellt und unterbrochen werden kann.1 and 2 schematically show a first embodiment of a rope brake according to the invention, which is generally designated by reference number 10. This comprises a substantially L-shaped stand 12 with a first leg 13 and a second leg 14 which is held stationary in an elevator shaft or in the machine room of an elevator system. A stop 16 is fixed to the free end of the first leg 13 and is to be braked parallel to one Rope 18 of the elevator system is aligned and carries a brake pad 20 on its front side facing the rope 18. A jib 22 projects from the stop 16, on which a pivot lever 25 is articulated by means of a bearing 23 and can be pivoted about a pivot axis 26 oriented perpendicular to the longitudinal direction of the cable 18. A movable brake shoe 28, which is aligned parallel to the stop 16, is articulated on the swivel lever 25 by means of a bearing 27. The cable 18 is passed between the stop 16 and the movable brake shoe 28 and can be braked by moving the brake shoe 28 by means of the swivel lever 25, starting from its release position shown in FIG. 1, into the braking position shown in FIG. 2, in which the brake shoe 28 the rope 18 presses against the brake pad 20 of the stop 16. The second leg 14 of the stator 12 carries a linear drive 30 in the area of its free end. This can be, for example, an electric linear motor or also a hydraulic or pneumatic piston-cylinder unit. The linear drive 30 has an actuating member 32 which can be moved in a straight line parallel to the second leg 14. The actuator 32 can be designed, for example, in the form of a piston rod. At the free end of the actuator 32, an elastic member 33 is arranged, via which the actuator 32 is coupled to an electromagnet 34, which is connected to a voltage source 38 via electrical power supply lines 35, 36. An interrupter unit 40 is connected into the power supply line 35, with the aid of which the electrical connection between the voltage source 38 and the electromagnet 34 can be established and interrupted as required.
Der Elektromagnet 34 wirkt mit einem Anker 42 zusammen, der am freien Ende des Schwenkhebels 25 mittels eines Lagers 43 angelenkt ist. An dem Schwenkhebel 25 ist über das Lager 43 zusätzlich zum Anker 42 ein Kraftübertragungsglied in Form einer Bremsfederstange 45 angelenkt, die mit ihrem dem Lager 43 abgewandten Ende an einer als Schraubenfeder ausgebildeten Bremsfeder 47 festgelegt ist, die am Ständer 12 ortsfest gehalten ist. Der Linearmotor 30 und die Bremsfederstange 45 sind fluchtend zueinander ausgerichtet, und mittels der Bremsfeder 47 wird der Schwenkhebel 25 über die Bremsfederstange 45 mit einer dem Linearmotor 20 abgewandten Federkraft beaufschlagt, während vom Linearmotor 30 über das Betätigungsglied 32, das elastische Glied 33, den Elektromagneten 34 und den Anker 42 auf den Schwenkhebel 25 eine der Bremsfeder 47 entgegenwirkende Betätigungskraft ausgeübt wird, die somit der Federkraft entgegenwirkt. Die vom Schwenkhebel 25 in der Freigabestellung und der Bremsstellung der Bremsbacke 28 eingenommene Schwenkstellung wird jeweils von einem elektrischen Stellungsschalter 49 bzw. 51 erfaßt. Hierzu weisen die beiden Stellungsschalter 49, 51 jeweils einen Schaltnocken 52 bzw. 53 auf, an den der Schwenkhebel 25 anlegbar ist und aufgrund dessen Betätigung der jeweilige Stellungsschalter 49 bzw. 51 seine Schaltstellung ändert. Die Schaltstellung der Stellungsschalter 49 und 51 kann in üblicher Weise über an sich bekannte und deshalb zur Erzielung einer besseren Übersicht in der Zeichnung nicht dargestellte Signalleitungen elektrisch überwacht werden.The electromagnet 34 interacts with an armature 42 which is articulated at the free end of the pivot lever 25 by means of a bearing 43. On the swivel lever 25, a force transmission member in the form of a brake spring rod 45 is articulated via the bearing 43 in addition to the armature 42, which is fixed with its end facing away from the bearing 43 to a brake spring 47 designed as a helical spring, which is held stationary on the stand 12. The linear motor 30 and the brake spring rod 45 are aligned with one another, and by means of the brake spring 47, the pivot lever 25 is acted upon by the spring spring rod 45 with a spring force facing away from the linear motor 20, while from the linear motor 30 via the actuator 32, the elastic member 33, the electromagnet 34 and the armature 42 is exerted on the swivel lever 25 an operating force counteracting the brake spring 47, which thus counteracts the spring force. The pivot position assumed by the pivot lever 25 in the release position and the braking position of the brake shoe 28 is in each case detected by an electrical position switch 49 or 51. For this purpose, the two position switches 49, 51 each have a switching cam 52 or 53, to which the pivot lever 25 can be placed and because of which the respective position switch 49 or 51 changes its switching position. The switching position of the position switches 49 and 51 can be electrically monitored in the usual way via signal lines which are known per se and are therefore not shown in the drawing in order to achieve a better overview.
Der Elektromagnet 34 ist am zweiten Schenkel 14 des Ständers 12 in Längsrichtung des zweiten Schenkels 14 verschiebbar gehalten mittels einer an sich bekannten und deshalb in der Zeichnung nur schematisch dargestellten Führungseinrichtung 55.The electromagnet 34 is held on the second leg 14 of the stand 12 so as to be displaceable in the longitudinal direction of the second leg 14 by means of a guide device 55 which is known per se and is therefore only shown schematically in the drawing.
Soll das Seil 18 abgebremst werden, so kann hierzu die elektrische Versorgungsleitung 35 mittels der Unterbrechereinheit 40 unterbrochen werden, d. h. der Erregerstrom des Elektromagneten 34 kann abgeschaltet werden. Dies hat zur Folge, daß der Elektromagnet 34 die Ankerplatte 42 freigibt, und dies wiederum bewirkt, daß der Schwenkhebel 25 aufgrund der von der Bremsfeder 47 auf ihn permanent ausgeübten Federkraft so verschwenkt wird, daß die bewegliche Bremsbacke 28 das Seil 18 gegen den Bremsbelag 20 des Anschlags 16 presst. Dies ist in Figur 2 dargestellt. Die der Bremsstellung der beweglichen Bremsbacke 28 entsprechende Schwenkstellung des Schwenkhebels 25 kann dann mittels des elektrischen Stellungsschalters 51 überprüft werden.If the cable 18 is to be braked, the electrical supply line 35 can be interrupted by means of the interrupter unit 40, i. H. the excitation current of the electromagnet 34 can be switched off. As a result, the electromagnet 34 releases the armature plate 42, and this in turn causes the pivoting lever 25 to be pivoted due to the spring force permanently exerted on it by the brake spring 47 such that the movable brake shoe 28 moves the cable 18 against the brake pad 20 of the stop 16 presses. This is shown in Figure 2. The pivot position of the pivot lever 25 corresponding to the braking position of the movable brake shoe 28 can then be checked by means of the electrical position switch 51.
Soll das abgebremste Seil 18 anschließend wieder freigegeben werden, so kann hierzu der verschiebbar gelagerte Elektromagnet 34 mittels des Betätigungsgliedes 32 in Richtung des Ankers 42 verschoben werden und gleichzeitig kann der Erregerstrom des Elektromagneten 34 mittels der Unterbrechereinheit 40 wieder eingeschaltet werden, so daß der an den Anker 42 angenäherte Elektromagnet 34 eine magnetische Haltekraft auf den Anker 42 ausübt. Anschließend kann der Elektromagnet 42 vom Betätigungsglied 32 mit einer der Federkraft der Bremsfeder 47 entgegenwirkenden und diese überschreitenden Betätigungskraft beaufschlagt werden, so daß der Elektromagnet 34 entlang der Führungseinrichtung 55 zurückverschoben wird, wobei gleichzeitig der Schwenkhebel 25 so verschwenkt wird, daß die bewegliche Bremsbacke 28 ihre Freigabesteilung einnimmt. Dies ist in Figur 1 dargestellt. Die der Freigabesteilung der Bremsbacke 28 entsprechende Schwenkstellung des Schwenkhebels 25 kann mittels des elektrischen Stellungsschalters 49 überprüft werden.If the braked rope 18 is then to be released again, the displaceably mounted electromagnet 34 can be moved in the direction of the armature 42 by means of the actuating member 32 and at the same time The excitation current of the electromagnet 34 can be switched on again by means of the interrupter unit 40, so that the electromagnet 34, which is approached to the armature 42, exerts a magnetic holding force on the armature 42. Subsequently, the electromagnet 42 can be acted upon by the actuating element 32 with an actuating force which counteracts the spring force of the brake spring 47 and exceeds it, so that the electromagnet 34 is displaced back along the guide device 55, the pivot lever 25 being pivoted at the same time so that the movable brake shoe 28 can be moved Approval division occupies. This is shown in Figure 1. The swivel position of the swivel lever 25 corresponding to the release division of the brake shoe 28 can be checked by means of the electrical position switch 49.
Die Funktionsfähigkeit der Seilbremse 10 kann beispielsweise anläßlich eines Fahrkorbh altes überprüft werden, indem der Linearantrieb 30 den Elektromagneten 34 so lange in Richtung der Bremsfeder 47 verschiebt, bis der elektrische Stellungsschalter 51 betätigt wird und folglich der Schwenkhebel 25 seine der Bremsstellung der Bremsbacke 28 entsprechende Schwenkstellung einnimmt. Anschließend kann der Elektromagnet 34 mittels der Unterbrechereinheit 40 stromlos geschaltet und der stromlose Zustand des Magneten überprüft werden. In einem weiteren Prüfschritt kann dann der stromlose Elektromagnet 34 vom Linearantrieb 30 in die der Bremsfeder 47 abgewandte Richtung verschoben werden und es kann dann geprüft werden, ob der elektrische Stellungsschalter 51 seine Schaltstellung ändert. Dies würde bedeuten, daß eine Funktionsstörung der Seilbremse 10 vorliegt, da bei stromlos geschaltetem Elektromagneten 34 dessen Positionsänderung keinen Einfluß auf die Schwenkstellung des Schwenkhebels 25 haben darf. In einem weiteren Prüfschritt kann dann der immer noch stromlos geschaltete Elektromagnet 34 erneut in Richtung der Bremsfeder 47 verfahren und anschließend mittels der Unterbrechereinheit 40 mit dem Erregerstrom beaufschlagt werden, so daß er auf den Anker 42 eine magnetische Haltekraft ausübt. In einem weiteren Prüfschritt kann der mit Erregerstrom beaufschlagte Elektromagnet 34 erneut in die der Bremsfeder 27 abgewandte Richtung verschoben werden, wobei geprüft werden kann, ob die elektrischen Stellungsschalter 51 und 49 ihre Schaltstellung ändern aufgrund der Schwenkbewegung des Schwenkhebels 25. Nachdem der elektrische Stellungsschalter 49 angezeigt hat, daß der Schwenkhebel 25 seine der Freigabestellung der Bremsbacke 28 entsprechende Schwenkstellung eingenommen hat, kann der Normalbetrieb der Aufzuganlage wieder aufgenommen werden.The functionality of the cable brake 10 can be checked, for example, on the occasion of a car hold, by the linear drive 30 displacing the electromagnet 34 in the direction of the brake spring 47 until the electrical position switch 51 is actuated and consequently the pivot lever 25 and its pivot position corresponding to the brake position of the brake shoe 28 occupies. The electromagnet 34 can then be switched currentless by means of the interrupter unit 40 and the currentless state of the magnet can be checked. In a further test step, the electroless electromagnet 34 can then be displaced by the linear drive 30 in the direction facing away from the brake spring 47 and it can then be checked whether the electrical position switch 51 changes its switching position. This would mean that there is a malfunction of the cable brake 10, since when the electromagnet 34 is switched off, its change in position must not have any influence on the swivel position of the swivel lever 25. In a further test step, the electromagnet 34, which is still de-energized, can again move in the direction of the brake spring 47 and then by means of the Interrupter unit 40 are acted upon by the excitation current so that it exerts a magnetic holding force on the armature 42. In a further test step, the electromagnet 34 charged with excitation current can be displaced again in the direction facing away from the brake spring 27, it being possible to check whether the electrical position switches 51 and 49 change their switching position due to the pivoting movement of the pivot lever 25. After the electrical position switch 49 is displayed If the pivot lever 25 has assumed its pivot position corresponding to the release position of the brake shoe 28, normal operation of the elevator system can be resumed.
In den Figuren 3 und 4 ist schematisch eine insgesamt mit dem Bezugszeichen 60 belegte zweite Ausführungsform einer erfindungsgemäßen Seilbremse dargestellt. Diese ist weitgehend identisch aufgebaut wie die voranstehend unter Bezugnahme auf die Figuren 1 und 2 erläuterte Seilbremse 10. Für identische bzw. funktionsgleiche Bauteile werden daher in den Figuren 3 und 4 die gleichen Bezugszeichen verwendet wie in den Figuren 1 und 2. Zur Vermeidung von Wiederholungen wird diesbezüglich vollinhaltlich auf die voranstehenden Ausführungen Bezug genommen.FIGS. 3 and 4 schematically show a second embodiment of a rope brake according to the invention, which is generally designated by reference numeral 60. This is largely identical in construction to the rope brake 10 explained above with reference to FIGS. 1 and 2. For identical or functionally identical components, the same reference numerals are therefore used in FIGS. 3 and 4 as in FIGS. 1 and 2. To avoid repetitions In this regard, full reference is made to the above statements.
Die Seilbremse 60 weist ebenfalls einen ortsfesten Ständer 12 auf, der im wesentlichen L-förmig ausgestaltet ist und einen ersten Schenkel 13 sowie einen zweiten Schenkel 14 umfaßt. Das abzubremsende Seil 18 ist wiederum zwischen einem in Längsrichtung des Seiles 18 unbeweglich am ersten Schenkel 13 gehaltenen Anschlag 16, der einen Bremsbelag 20 aufweist, und einer beweglichen Bremsbacke 28 hindurchgeführt. Während bei der in den Figuren 1 und 2 dargestellten Seilbremse 10 ein einarmiger Schwenkarm 25 zum Einsatz kommt, an dem die bewegliche Bremsbacke 28 zwischen den Lagern 23 und 43 angelenkt ist, kommt bei der in den Figuren 3 und 4 dargestellten Seil- bremse 60 ein zweiarmiger Schwenkhebel 62 zum Einsatz, der ungefähr L-förmig ausgestaltet ist und einen langen ersten Hebelarm 64 sowie einen kurzen zweiten Hebelarm 63 umfaßt. Zur Lagerung des Schwenkhebels 62 am Ständer 12 kommt wiederum ein vom Anschlag 16 abstehender Ausleger 22 zum Einsatz, der ein Lager 23 trägt zur Lagerung des Schwenkhebels 62. Die bewegliche Bremsbacke 28 ist am freien Ende des zweiten Hebelarmes 63 mittels eines Lagers 66 gehalten, und der Anker 42 der Seilbremse 60 ist ebenso wie das freie Ende der Bremsfederstange 45 mittels eines Lagers 67 am freien Ende des ersten Hebelarmes 64 angelenkt.The cable brake 60 also has a stationary stand 12 which is essentially L-shaped and comprises a first leg 13 and a second leg 14. The cable 18 to be braked is in turn passed between a stop 16, which is held immovably in the longitudinal direction of the cable 18 on the first leg 13 and has a brake pad 20, and a movable brake shoe 28. While a one-armed swivel arm 25 is used in the rope brake 10 shown in FIGS. 1 and 2, on which the movable brake shoe 28 is articulated between the bearings 23 and 43, the rope brake shown in FIGS. Brake 60 a two-armed pivot lever 62 for use, which is approximately L-shaped and includes a long first lever arm 64 and a short second lever arm 63. To mount the pivot lever 62 on the stand 12, a bracket 22 projecting from the stop 16 is in turn used, which carries a bearing 23 for mounting the pivot lever 62. The movable brake shoe 28 is held at the free end of the second lever arm 63 by means of a bearing 66, and the armature 42 of the cable brake 60, like the free end of the brake spring rod 45, is articulated by means of a bearing 67 on the free end of the first lever arm 64.
Der Anker 42 wirkt mit einem Elektromagneten 34 zusammen, der mittels eines Linearantriebes 30 parallel zur Längsrichtung des Seiles 18 über eine Führungseinrichtung 55 verschoben werden kann. Der Schwenkhebel 62 wird von der Bremsfeder 47 permanent mit einer Federkraft beaufschlagt, die der vom Linearmotor 30 in der Freigabesteilung der beweglichen Bremsbacke 28 auf den Schwenkhebel 62 über den Elektromagnet 34 und den Anker 42 ausgeübten Betätigungskraft entgegen gerichtet ist. Auch bei der Seilbremse 60 sind der Linearmotor 30, die Bremsfederstange 45 und die Bremsfeder 47 fluchtend zueinander ausgerichtet. Im Unterschied zur Seilbremse 10 sind sie jedoch parallel zur Längsrichtung des Seiles 18 angeordnet. Die Seilbremse 60 weist daher eine besonders schmal bauende Bauform auf, während die in den Figuren 1 und 2 dargestellte Seilbremse 10 bezogen auf die Längsrichtung des Seiles 18 eine breite, dafür jedoch kurze Bauform aufweist.The armature 42 interacts with an electromagnet 34, which can be moved by means of a linear drive 30 parallel to the longitudinal direction of the cable 18 via a guide device 55. The pivoting lever 62 is permanently acted upon by the brake spring 47 with a spring force which is directed against the actuating force exerted by the linear motor 30 in the release division of the movable brake shoe 28 on the pivoting lever 62 via the electromagnet 34 and the armature 42. The linear motor 30, the brake spring rod 45 and the brake spring 47 are also aligned with one another in the cable brake 60. In contrast to the rope brake 10, however, they are arranged parallel to the longitudinal direction of the rope 18. The cable brake 60 therefore has a particularly narrow design, while the cable brake 10 shown in FIGS. 1 and 2 has a wide but short design with respect to the longitudinal direction of the cable 18.
Die Funktion der Seilbremse 60 kann selbsttätig beispielsweise anläßlich eines Fahrkorbhaltes überprüft werden, indem der Magnet 34 mittels des Linearantriebes 30 hin- und herverschoben wird und die jeweils vom Schwenkhebel 62 eingenommene Schwenkstellung mittels der elektrischen Stellungsschalter 49 und 51 geprüft wird. The function of the cable brake 60 can be checked automatically, for example on the occasion of a car stop, in that the magnet 34 is pushed back and forth by means of the linear drive 30 and the pivot position assumed by the pivot lever 62 is checked by means of the electrical position switches 49 and 51.

Claims

PATENTANSPRUCHE PATENT CLAIMS
1. Seilbremse (10; 60) für eine Aufzuganlage zum Abbremsen eines mit einem Fahrkorb gekoppelten Seiles (18), mit einem in Seillängsrichtung unbeweglichen Anschlag (16) und mindestens einer Bremsbacke (28), wobei das Seil (18) zwischen dem Anschlag (16) und der Bremsbacke (28) hindurchführbar ist und die Bremsbacke (28) zwischen einer das Seil (18) gegen den Anschlag (16) pressenden Bremsstellung und einer das Seil (18) freigebenden Freigabesteilung hin- und herbewegbar ist, und mit einem mit der Bremsbacke (28) gekoppelten Antrieb (30) zum Freigeben des Seiles (18), dadurch gekennzeichnet, daß der Antrieb als Linearantrieb (30) ausgebildet ist und die mindestens eine Bremsbacke (28) entgegen der Wirkung einer in der Bremsstellung auf sie einwirkenden Bremskraft mittels des Linearantriebes (30) in ihre Freigabestellung überführbar ist.1. rope brake (10; 60) for an elevator system for braking a rope (18) coupled to a car, with a stop (16) which is immobile in the longitudinal direction of the rope and at least one brake shoe (28), the rope (18) between the stop ( 16) and the brake shoe (28) can be passed through and the brake shoe (28) can be moved back and forth between a braking position pressing the rope (18) against the stop (16) and a release division releasing the rope (18), and with one the brake shoe (28) coupled drive (30) for releasing the cable (18), characterized in that the drive is designed as a linear drive (30) and the at least one brake shoe (28) against the effect of a braking force acting on it in the braking position can be moved into its release position by means of the linear drive (30).
2. Seilbremse nach Anspruch 1, dadurch gekennzeichnet, daß die mindestens eine Bremsbacke (28) mittels des Linearantriebes (30) zwischen ihrer Bremsstellung und ihrer Freigabestellung hin- und herbewegbar ist.2. Cable brake according to claim 1, characterized in that the at least one brake shoe (28) can be moved back and forth between its braking position and its release position by means of the linear drive (30).
3. Seilbremse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Linearantrieb (30) als elektrischer, hydraulischer oder pneumatischer Antrieb ausgestaltet ist.3. Rope brake according to claim 1 or 2, characterized in that the linear drive (30) is designed as an electrical, hydraulic or pneumatic drive.
4. Seilbremse nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Linearantrieb (30) als Gewindespindel- oder Schraubantrieb ausgestaltet ist. 4. Cable brake according to one of the preceding claims, characterized in that the linear drive (30) is designed as a threaded spindle or screw drive.
5. Seilbremse nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die mindestens eine Bremsbacke (28) über einen schwenkbar gelagerten Schwenkhebel (25; 62) mit dem Linearantrieb (30) gekoppelt ist.5. Cable brake according to one of the preceding claims, characterized in that the at least one brake shoe (28) via a pivotally mounted pivot lever (25; 62) is coupled to the linear drive (30).
6. Seilbremse nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Seilbremse (10; 60) ein Federelement (47) umfaßt, das die mindestens eine Bremsbacke (28) in ihrer Bremsstellung mit der Bremskraft beaufschlagt.6. Cable brake according to one of the preceding claims, characterized in that the cable brake (10; 60) comprises a spring element (47) which acts on the at least one brake shoe (28) in its braking position with the braking force.
7. Seilbremse nach Anspruch 6, dadurch gekennzeichnet, daß das Federelement (47) eine Feder mit linearer Kennlinie ausbildet.7. Cable brake according to claim 6, characterized in that the spring element (47) forms a spring with a linear characteristic.
8. Seilbremse nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß das Federelement (47) über einen schwenkbar gelagerten Schwenkhebel (25; 62) mit der mindestens einen Bremsbacke (28) zusammenwirkt.8. Cable brake according to claim 6 or 7, characterized in that the spring element (47) via a pivotally mounted pivot lever (25; 62) cooperates with the at least one brake shoe (28).
9. Seilbremse nach Anspruch 8, dadurch gekennzeichnet, daß über den Schwenkhebel (25; 62) sowohl das Federelement (47) als auch der Linearantrieb (30) mit der mindestens einen Bremsbacke (28) gekoppelt sind.9. Cable brake according to claim 8, characterized in that both the spring element (47) and the linear drive (30) with the at least one brake shoe (28) are coupled via the pivot lever (25; 62).
10. Seilbremse nach Anspruch 9, dadurch gekennzeichnet, daß das Federelement (47) und der Linearantrieb (30) fluchtend zueinander ausgerichtet sind.10. Cable brake according to claim 9, characterized in that the spring element (47) and the linear drive (30) are aligned with one another.
11. Seilbremse nach Anspruch 10, dadurch gekennzeichnet, daß das Federelement (47) über ein fluchtend zum Linearantrieb ausgerichtetes Kraftübertragungsglied (45) mit dem Schwenkhebel (25; 62) gekoppelt ist. 11. Cable brake according to claim 10, characterized in that the spring element (47) is coupled to the swivel lever (25; 62) via a force transmission element (45) aligned with the linear drive.
12. Seilbremse nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die mindestens eine Bremsbacke (28) über einen Elektromagneten (34) und einen diesem zugeordneten Anker (42) mit dem Linearantrieb (30) gekoppelt ist.12. Cable brake according to one of the preceding claims, characterized in that the at least one brake shoe (28) via an electromagnet (34) and an associated armature (42) is coupled to the linear drive (30).
13. Seilbremse nach Anspruch 12, dadurch gekennzeichnet, daß der Elektromagnet (34) und der Anker (42) zwischen dem mit der Bremsbacke (28) gekoppelten Schwenkhebel (25; 62) und dem Linearantrieb (30) angeordnet sind.13. Cable brake according to claim 12, characterized in that the electromagnet (34) and the armature (42) between the with the brake shoe (28) coupled pivot lever (25; 62) and the linear drive (30) are arranged.
14. Seilbremse nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß der Anker (42) oder der Elektromagnet (34) am Schwenkhebel (25; 62) angelenkt sind.14. Cable brake according to claim 12 or 13, characterized in that the armature (42) or the electromagnet (34) on the pivot lever (25; 62) are articulated.
15. Seilbremse nach Anspruch 12, 13 oder 14, dadurch gekennzeichnet, daß der Elektromagnet (34) und/oder der Anker (42) linear verschiebbar gehalten sind.15. Cable brake according to claim 12, 13 or 14, characterized in that the electromagnet (34) and / or the armature (42) are held linearly displaceable.
16. Seilbremse nach Anspruch 15, dadurch gekennzeichnet, daß der Elektromagnet (34) und/oder der Anker (42) mittels des Linearantriebes (30) linear verfahrbar sind.16. Cable brake according to claim 15, characterized in that the electromagnet (34) and / or the armature (42) can be moved linearly by means of the linear drive (30).
17. Seilbremse nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, daß zwischen dem Linearantrieb (30) und dem Elektromagneten (34) oder dem Anker (42) ein elastisches Glied (33) angeordnet ist.17. Cable brake according to one of claims 12 to 16, characterized in that between the linear drive (30) and the electromagnet (34) or the armature (42) an elastic member (33) is arranged.
18. Seilbremse nach Anspruch 16 oder 17, dadurch gekennzeichnet, daß der Elektromagnet (34) und/oder der Anker (42) an einem ortsfesten Ständer (12) verfahrbar gehalten sind, an dem der Linearantrieb (30) und das Federelement (47) angeordnet sind. 18. Cable brake according to claim 16 or 17, characterized in that the electromagnet (34) and / or the armature (42) are movably held on a stationary stand (12) on which the linear drive (30) and the spring element (47) are arranged.
19. Seilbremse nach Anspruch 18, dadurch gekennzeichnet, daß der Schwenkhebel (25; 62) am Ständer (12) verschwenkbar gelagert ist.19. Cable brake according to claim 18, characterized in that the pivot lever (25; 62) on the stand (12) is pivotally mounted.
20. Seilbremse nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Stellung eines Betätigungsgliedes (32) des Linearantriebes (30), eines Kraftübertragungsgliedes (45) des Federelementes (47) und/oder die Stellung des Schwenkhebels (25; 62) von mindestens einem Sensor (49, 51) überwachbar ist.20. Cable brake according to one of the preceding claims, characterized in that the position of an actuating member (32) of the linear drive (30), a force transmission member (45) of the spring element (47) and / or the position of the pivot lever (25; 62) of at least a sensor (49, 51) can be monitored.
21. Seilbremse nach Anspruch 20, dadurch gekennzeichnet, daß zumindest ein Sensor als elektrischer Stellungsschalter (49, 51) ausgestaltet ist.21. Cable brake according to claim 20, characterized in that at least one sensor is designed as an electrical position switch (49, 51).
22. Verfahren zum Prüfen der Funktionsfähigkeit einer Seilbremse (10; 60) nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß man bei stehendem Fahrkorb die bewegbare Bremsbacke (28) nacheinander in ihre beiden Endstellungen bringt und den Endstellungen der Bremsbacke (28) entsprechende Schaltstellungen zumindest eines Stellungsschalters (49, 51) überprüft.22. A method for checking the functionality of a rope brake (10; 60) according to one of the preceding claims, characterized in that the movable brake shoe (28) is brought into its two end positions and the end positions of the brake shoe (28) corresponding switch positions when the car is stationary checked at least one position switch (49, 51).
23. Verfahren nach Anspruch 22, dadurch gekennzeichnet, daß man die Bremsbacke (28) mittels des Linearantriebes (30) nacheinander in ihre beiden Endstellungen überführt.23. The method according to claim 22, characterized in that one transfers the brake shoe (28) by means of the linear drive (30) one after the other into their two end positions.
24. Verfahren nach Anspruch 22 oder 23, dadurch gekennzeichnet, daß man den Endstellungen der Bremsbacke (28) entsprechende Schaltstellungen zumindest eines dem Schwenkhebel (25; 62) zugeordneten Stellungsschalters (49, 61) elektrisch überprüft. 24. The method according to claim 22 or 23, characterized in that the end positions of the brake shoe (28) corresponding switching positions of at least one of the pivot lever (25; 62) associated position switch (49, 61) electrically checked.
25. Verfahren nach Anspruch 22, 23 oder 24, dadurch gekennzeichnet, daß man in der Bremsstellung der Bremsbacke (28) die Funktion einer in eine Stromversorgungsleitung (35) des Elektromagneten (34) geschalteten Unterbrechereinheit (40) prüft.25. The method according to claim 22, 23 or 24, characterized in that in the braking position of the brake shoe (28) the function of a in a power supply line (35) of the electromagnet (34) connected interrupter unit (40) is checked.
26. Verfahren nach Anspruch 25, dadurch gekennzeichnet, daß man den Elektromagneten (34), nachdem man dessen Erregerstrom abgeschaltet hat, mittels des Linearmotors (30) in seine der Freigabesteilung der Bremsbacke (28) entsprechende Stellung verfährt und die Schaltstellungen zumindest eines dem Schwenkhebel (25; 62) oder der Bremsbacke (28) zugeordneten Stellungsschalters (49, 51) elektrisch überprüft.26. The method according to claim 25, characterized in that the electromagnet (34), after having turned off its excitation current, by means of the linear motor (30) in its position corresponding to the release division of the brake shoe (28) and the switching positions of at least one of the pivot lever (25; 62) or the brake shoe (28) associated position switch (49, 51) electrically checked.
27. Verfahren nach Anspruch 26, dadurch gekennzeichnet, daß man den Elektromagneten (34) anschließend mittels des Linearantriebes (30) wieder in seine der Bremsstellung der Bremsbacke (28) entsprechende Stellung zurückverfährt, dann dem Elektromagneten (34) wieder mit dem Erregerstrom beaufschlagt und ihn danach mittels des Linearantriebes (30) erneut in seine der Freigabestellung der Bremsbacke (28) entsprechende Stellung verfährt und die Schaltstellungen des dem Schwenkhebel (25; 62) oder der Bremsbacke (28) zugeordneten Stellungsschalters (49, 51) elektrisch überprüft. 27. The method according to claim 26, characterized in that the electromagnet (34) is subsequently moved back into its position corresponding to the braking position of the brake shoe (28) by means of the linear drive (30), then the electromagnet (34) is again acted upon by the excitation current and then move it again by means of the linear drive (30) into its position corresponding to the release position of the brake shoe (28) and electrically check the switching positions of the position switch (49, 51) assigned to the swivel lever (25; 62) or the brake shoe (28).
EP04763319A 2003-07-22 2004-07-17 Cable brake Active EP1646575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334654A DE10334654A1 (en) 2003-07-22 2003-07-22 cable brake
PCT/EP2004/008025 WO2005009883A1 (en) 2003-07-22 2004-07-17 Cable brake

Publications (2)

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EP1646575A1 true EP1646575A1 (en) 2006-04-19
EP1646575B1 EP1646575B1 (en) 2011-11-09

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ID=34042140

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EP04763319A Active EP1646575B1 (en) 2003-07-22 2004-07-17 Cable brake

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US (2) US7377371B2 (en)
EP (1) EP1646575B1 (en)
JP (1) JP4284359B2 (en)
KR (1) KR100744692B1 (en)
CN (1) CN1826279B (en)
AT (1) ATE532734T1 (en)
DE (1) DE10334654A1 (en)
ES (1) ES2373041T3 (en)
WO (1) WO2005009883A1 (en)

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Also Published As

Publication number Publication date
US20060157306A1 (en) 2006-07-20
KR20060041275A (en) 2006-05-11
ES2373041T3 (en) 2012-01-30
JP2006528117A (en) 2006-12-14
JP4284359B2 (en) 2009-06-24
ATE532734T1 (en) 2011-11-15
CN1826279B (en) 2012-01-04
WO2005009883A1 (en) 2005-02-03
US7377371B2 (en) 2008-05-27
US20080168832A1 (en) 2008-07-17
DE10334654A1 (en) 2005-02-10
EP1646575B1 (en) 2011-11-09
KR100744692B1 (en) 2007-08-01
US7510059B2 (en) 2009-03-31
CN1826279A (en) 2006-08-30

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