EP3153454A1 - Verrouillage de porte - Google Patents

Verrouillage de porte Download PDF

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Publication number
EP3153454A1
EP3153454A1 EP16192658.9A EP16192658A EP3153454A1 EP 3153454 A1 EP3153454 A1 EP 3153454A1 EP 16192658 A EP16192658 A EP 16192658A EP 3153454 A1 EP3153454 A1 EP 3153454A1
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EP
European Patent Office
Prior art keywords
bolt
drive
electric motor
motor
locking
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
EP16192658.9A
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German (de)
English (en)
Other versions
EP3153454B1 (fr
Inventor
Andreas Hesse
Holger Klaus
Michael Schulz
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.)
Hans and Jos Kronenberg GmbH
Original Assignee
Hans and Jos Kronenberg GmbH
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Application filed by Hans and Jos Kronenberg GmbH filed Critical Hans and Jos Kronenberg GmbH
Publication of EP3153454A1 publication Critical patent/EP3153454A1/fr
Application granted granted Critical
Publication of EP3153454B1 publication Critical patent/EP3153454B1/fr
Active legal-status Critical Current
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/14—Control systems or devices
    • B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
    • B66B13/165—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position electrical

Definitions

  • the invention relates to a door closure of an elevator door, wherein the door lock has a housing and a latch and the bolt is under position change in a locking position and an unlocking position can be transferred, wherein a drive is provided, which cooperates with the bolt via a drive mechanism, by means of which the bolt can be moved into its unlocked position, wherein the drive comprises a drive control which is signal-transmitting connected or connectable with an elevator control, the elevator control depending on the location of an external device such as an elevator car drives the drive to transfer the latch in its unlocked position, and wherein the door lock has a closing mechanism which, after the release thereof without the assistance of the drive, forcibly transfers the bolt from its unlocked position into its locking position, and wherein the door is also moved rver gleich has an emergency unlocking device to manually convert if necessary by means of the same the bolt independently of the drive in its unlocked position can.
  • the drive is often provided by a mechanical coupling, which cooperates with a arranged on the elevator car latch curve.
  • the latch curve of Elevator car in an extended or retracted position able to change so that the latch curve does not interact with the drive mechanism on each floor of each building, but only on the floor at which the elevator door is open.
  • the arrangement of the mechanical coupling between the locking cam and the drive as well as the mechanism and drive means for changing the position of the locking curve are structurally complex and expensive and require a corresponding installation space, which is not always present in the elevator shaft.
  • a retrofit of an elevator system in which the elevator car holds on several floors very complex.
  • elevator systems are often adapted to special external conditions, such as in tight structural situations or in the case of elevator shafts in glass construction, in which mechanical linkage arrangements of the drive mechanism for the bolt, which interact with the latch curve of an elevator car, not or only very complex realized can be and are often undesirable for optical reasons.
  • electromagnetic door locks for elevators in which the position of the elevator car is detected by means of a sensor device and the output thereof drives an electromagnet of the door lock, wherein the movable armature of the electromagnet actuates the drive mechanism of the bolt.
  • the drive mechanism To actuate the drive mechanism, however, comparatively high attraction forces of the magnet are required to effect a sufficiently rapid adjustment of the bolt in its unlocked position, for example, corresponding to an operating current of the electromagnet of several amperes.
  • this then requires a high anchor speed when the armature abuts against a stop in its end position, and thus a very high noise immission, which is particularly disturbing in structurally open elevator system is felt, for example, in systems in lightweight or in glass construction.
  • a noise insulation of the armature or the door lock or the adjacent components is structurally very complex.
  • a door closure of a lift must meet the relevant safety requirements, in particular meet the relevant elevator test standards, if necessary, such as EN 81-20, EN 81-50 and EN 60947-5-1.
  • the invention is therefore an object of the invention to provide a door lock, which solves the problem, at least partially or in combination, to allow a cost-effective design of the door lock and / or the elevator system to allow a low-noise operation of the door lock further preferably the door lock for a simple Retrofitting of elevator systems or for the use of elevator systems with special structural conditions such as in narrow elevator shafts or glass cladding of the elevator shaft is particularly suitable.
  • a door lock according to claim 1, wherein the drive is provided by an electric motor and / or a braking device is provided which at least temporarily decelerates the bolt during its transfer into its locking position.
  • the door lock can be actuated particularly quietly, in particular the latch can be converted into its unlocked position with low noise.
  • the electric motor drives the bolt thus preferably during its transfer into the unlocked position, ie also in the middle region of the bolt stroke, So the Riegelverfahrweges between locking and unlocking position.
  • the bolt can be quickly transferred into its unlocked position and an electric motor can be integrated with little design effort in the door lock housing, especially without the elevator-related safety components or assemblies of the door lock to change, such as a blocking means switch, which in positioning of Latch switches in its locking position and thus indicates the latch position and releases a movement of the elevator car, the arrangement of a lever acting on the latch, in particular toothed lever as part of the drive mechanism and the like.
  • electric motors and thus the door lock are inexpensive to produce and electric motors are easily and flexibly controlled.
  • the door lock is easily adaptable to different requirements, especially in elevators, in particular to the requirements for passenger lifts in compliance with the relevant test standards.
  • the door lock according to the invention has advantages over the arrangement of an electromagnet as a drive element, in which only one switching on and off is possible and after actuation of the electromagnet to open the bolt, the bolt movement is no longer controllable.
  • the operation of the electromagnet must also be designed to initiate a safe opening operation of the bolt from its unlocked position.
  • the bolt at the beginning of the unlocking process by means of the magnet must be acted upon with high force in order to overcome even irregularities of a non-proper door, such as, for example, certain tension or distortion.
  • the kinematics of the further locking movement is predetermined, in contrast to the inventive use of an electric motor for driving the bolt even after initiation of the unlocking movement, So after leaving the locking position by the bolt.
  • the "unlocking position” or “locking position” is to be understood in each case as the end position or rest position of the bolt in the respective unlocking or locking position of the bolt.
  • a blocking means switch is provided as monitoring or electrical safety device which monitors the arrangement of the bolt in its locking position.
  • the safety switch is preferably a positive-opening safety switch, which thus forcibly in the locked position in the locking position, ie mandatory and virtually automatically, switches or opens (as is well known, a positive-opening safety switch can be technically equivalent replaced by a safety circuit).
  • a positive-opening safety switch can be technically equivalent replaced by a safety circuit.
  • This is, for example for door closures of elevators a mandatory safety device: only when confirmation of the arrangement of the bolt in its locked position with appropriate display or signal output from the blocking means switch the elevator is movable.
  • the arrangement of a blocking means switch requires a long travel or stroke of the bolt between its locking and its unlocked position.
  • the technical standards EN 81-20 and EN 81-50 require inter alia for the bolt for locking an elevator door intervention of at least 7 mm before the blocking means switch is closed, or a corresponding other electrical safety device takes effect.
  • the total bolt stroke between the two end positions mentioned can thus easily be ⁇ 8 mm or ⁇ 12 mm, in some applications also ⁇ 15 mm or ⁇ 20 mm, for example in the range of 25 mm.
  • the necessary large stroke of the bolt is effected particularly favorably by an electric motor used according to the invention. To perform such a long strokes with sufficient power reserves is difficult to implement, for example, for a built-in housing, so compact solenoid.
  • the door lock according to the invention has a very long life and low wear of the bolt guide due to over the long travel continuous and even or exactly pre-determined movement movement, which also also a quiet and Low-noise operation of the door lock over its lifetime allows and significantly reduces the maintenance of the door lock.
  • the door lock comprises a Krebsschbach puzzle, which prevents the switching of the blocking switch when the door is open. This also prevents the bolt from being closed when the door is open.
  • This safety device is often required. However, in the arrangement of this safety device a long travel of the bolt is necessary or at least particularly useful to allow safe operation of this safety device and / or a secure interaction with the bolt.
  • the use of an electric motor has been found to be particularly advantageous when the bolt between its locking position and its unlocked position passes through a hub which is greater than / equal to twice the engagement depth of the bolt in the door in the locking position of the bolt.
  • the entire bolt stroke between the two end positions mentioned can thus easily be ⁇ 12 mm or ⁇ 20 mm, for example in the range of 25 mm.
  • the door lock can be particularly easily adapted to special structural and / or safety requirements. This refers, for example, to the possible positioning of the bolt in its locking and / or unlocking position.
  • This also relates, for example, alternatively or cumulatively, to the arrangement of further safety devices of the door closure, which cooperate with the latch or are to be actuated by the latch, such as a blocking means switch or corresponding electrical safety device and / or a false closing device.
  • the electric motor when transferring the bolt into its locking position, the electric motor is non-driven with respect to a feed of the bolt in its locking position.
  • the transfer of the bolt in its locking position is thus not driven by the electric motor supported.
  • This allows the drive mechanism and the locking mechanism with respect to the transfer of the bolt in its respective end position (unlock or locking position) formed independently of each other and the electric motor can be carried out regardless of the safety requirements in the closing operation of the locking mechanism.
  • This also simplifies the design of the driven by the electric motor drive mechanism of the bolt.
  • the motor can thus be made by the motor controller with respect to its drive power current and / or de-energized.
  • the rotor of the electric motor can rotate during the transfer of the bolt in its locking position, for example in function as an engine brake.
  • a structurally simple design of the door lock is given overall and the electric motor can be controlled easily and the door lock adapted in a special way to the requirements of a lift or elevator installation.
  • the motor control is preferably also designed to regulate the respective operating parameter of the motor to a predetermined desired value.
  • the electric motor is designed as a three-phase motor, brushless DC motor, bell armature motor or reluctance motor.
  • the motor is due to brushless design and thus the door lock particularly maintenance and wear.
  • the bolt is also in very uniform movement, quietly and precisely controlled in its unlocked position transferred, and thus the latching experience and the operation of the door lock very quiet. If necessary, however, conventional DC motors with brushes can generally also be used.
  • the electric motor used has a little or virtually no or no cogging torque, so that by the electric motor by the motor an automatic Closing the bolt is not hindered.
  • the motor is thus at least virtually no or very little self-locking of the drive mechanism is generated when the electric motor is operated counter to its drive direction on the bolt when the latch is transferred by means of the locking mechanism in its locking position.
  • the drive mechanism is coupled to the closing mechanism, wherein in closing operation of the closing mechanism of the drive mechanism is coupled against its drive direction coupled to the bolt with the locking mechanism, ie in the direction of the starting position of the drive mechanism for re-initiating an unlocking.
  • the electric motor can cooperate with a transmission as part of the drive mechanism, which usually causes a force transmission and Wegunterschen the engine to actuate the other parts of the drive mechanism for transferring the bolt in its unlocked position.
  • Any cogging torque of the electric motor would be amplified by the transmission, which could hinder or counteract an automatic and forced operation of the locking mechanism, so that thus inventively further developed locking mechanism when it is triggered, for example.
  • Due to the relaxation of a preloaded spring or other spring or energy storage device automatically and closes reliably. It has thus been found in the course of the invention that the said types of electric motors can be used particularly advantageously in the case of said door closures.
  • motors with little or virtually no cogging torque are in particular motors with ironless armature, motors with entangled poles (transverse to the motor axis grooves between the poles), motors with permanent magnets on the armature and groove-free stator, motors with permanent magnets on the stator and groove-free armature, wherein the motors are each three-phase motors or (preferably brushless) DC motors could be.
  • motors are each three-phase motors or (preferably brushless) DC motors could be.
  • reluctance motors or bell armature motors can be used.
  • the electric motor is preferably a motor which can be actuated or operated continuously via the unlocking movement of the bolt, ie a continuous motor which continuously applies a driving force to the bolt during its entire locking movement from its locking position into its unlocked position.
  • a uniform and low-noise operation of the bolt and thus a very low-maintenance door lock is given, in particular in contrast to stepper motors, which, however, may also be used in principle.
  • the electric motor used is not a stepping motor.
  • an electric motor is provided whose motor speed, motor torque, motor voltage, current consumption and / or power consumption during the transfer of the bolt from its locking position is controlled or controlled in its unlocked position, which may apply individually for each of the above control parameters.
  • the feed of the bolt or by means of the drive mechanism acting on the bolt force can be controlled in its transfer from its locking position to its unlocked position.
  • the control of the engine may optionally take place in dependence on the displacement position of the bolt between its two said rest positions.
  • the bolt can thereby be moved particularly uniformly or predetermined, or in compliance with certain predetermined tolerances with respect to Verfahrparameter the bolt, such as compliance with upper thresholds of bolt accelerations, force effects on the bolt, feed rates, etc.
  • a control of the engine speed or The power consumption of particular advantage when there is a politicianspannender or réelleladender latch closing mechanism of the electric motor.
  • the power consumption of the engine can be adapted to the force-displacement characteristic of the closing mechanism, so that with increasing force to be overcome of the closing mechanism during its voltage / charging the motor is operated with increased power and / or accordingly with decreasing force to be overcome, the motor with lower power is operated.
  • the bolt can thereby be moved in a targeted manner at least over most of its travel in a predetermined manner, for example. With a relatively uniform feed rate.
  • the electric motor is particularly easy to adapt to different door locks, for example. Such with different locking bolt mechanisms with different force-displacement characteristics with respect to the voltage or power charging, adaptable.
  • control of the motor for example, depending on the given at any time locking position between its two rest positions (for example. Under previous recording a corresponding characteristic), or in dependence of another predetermined operating parameter of the door lock.
  • the respectively mentioned control of the engine for example, control of the Mor Arthurlich and / or engine power, can be done in the range of travel of the bolt, which removes ⁇ 1% or ⁇ 2% or ⁇ 5% of the rest positions of the bolt or endpoints of the bolt movement is.
  • an electric motor in the form of a three-phase motor, brushless DC motor, bell armature motor or reluctance motor is advantageous here.
  • the motor control of the electric motor for its operation provides a variable current and / or a variable voltage and / or variable frequency or is configured to provide accordingly, in particular during the transfer of the bolt from its locking position to its unlocked position.
  • the current or voltage varies thus over time over the travel of the bolt between its two rest positions.
  • the electric motor may be operated at a variable frequency or be in such an operation.
  • the electric motor is particularly flexible with respect to the passage of the bolt operable in its unlocked position or the power consumption of the motor easily controlled.
  • the described control of power consumption refers to a control of the operating current or the operating voltage or the operating frequency of the motor or possibly a control of said manipulated variables in combination such as.
  • a combined current and voltage control each of which causes a corresponding change in performance.
  • the motor is driven or is controlled such that in the end region of the locking movement of the electric motor exerts only a small feed on the bolt to counteract noise during the attack.
  • This can be done by means of a control of the speed, power consumption, operating current or voltage of the motor.
  • the motor can be operated or operated with increased power or increased current and / or voltage relative to the time-averaged power, current or voltage in the middle region of the latching movement between the locking position and the unlocking position To accelerate the opening process or temporarily exert a high force on the bolt to ensure a safe opening movement of the bolt, for example. Even with certain irregularities in the operation of the elevator door as in tensions of the door.
  • a control of the operating current and / or the operating voltage of the motor can be particularly advantageous when a locking mechanism described below is provided, which is stretched or charged by the electric motor, wherein the operating current and / or the operating voltage of the motor or the power consumption of the engine in response to the force-displacement characteristic of the closing mechanism, in the same direction with changes in the force according to the characteristic.
  • the electric motor can be operated or operated so that after initiating the locking movement from its locking position, the latch undergoes an at least substantially constant feed rate in the direction of its unlocked position and decreases towards the end of the feed in the unlocking the bolt speed.
  • the increase and / or decrease in the locking speed when starting or braking the bolt can be continuous or continuous, in each case optionally with the formation of speed plateaus, for example also at least substantially linear.
  • the locking position of the bolt is preferably limited within the scope of the invention by a stop.
  • the door lock on a braking device which brakes the bolt at least temporarily during its transfer from its unlocked position into its locking position.
  • the feed rate of the bolt is thus at least temporarily braked in the direction of its locking position, for example, at the beginning of the locking movement of the bolt or when leaving the unlocked position.
  • the motor in its stationary state when the bolt is arranged in its unlocked position can act as a brake when the locking movement of the bolt is initiated.
  • the braking device the stop speed of the bolt is reduced in its locking position and thus the door lock is operated with low noise.
  • the braking device here is different from the bolt stop which defines the locking position, and different from switching contacts of the door lock such as a blocking means switch, which indicates the bolt lock position and sends a signal to the elevator control to initiate or enable a process of the elevator car.
  • the braking device is preferably provided in addition to the components of the door lock or its functions for operating the device otherwise described in the context of the invention, in particular in addition to the drive device of the bolt for transferring the same into its unlocked position.
  • the braking device may optionally be designed releasable to effect the braking force, for example, coupled with the triggering of another device of the door lock, for example. Coupled with the triggering of the locking mechanism or in dependence of a predefined operating state such as. Feed position of the bolt.
  • Said coupling can cause a simultaneous release of braking device and the other door lock device or a delayed release of the braking device with respect to the triggering of the other device, so that the braking device only after a certain feed of the bolt in the direction of its locking position braking on the Bar acts.
  • the "other door closure device” may each be independent of the locking mechanism.
  • the braking device is preferably designed or configured such that it is deactivated or deactivated upon transfer of the bolt from its locking position into its unlocked position (ie can be adjusted or set without braking force), so that the transfer of the bolt into its unlocking position is not slowed down by means of the braking device ,
  • the braking device is activated or activated. The braking device is thus switched on and off.
  • the effect of the braking device can be done in only a portion of the bolt feed in the direction of its locking position or possibly also over the entire travel of the bolt in its locking position. It has already been found to reduce noise when the bolt at the beginning or in the beginning of his travel from the unlocked position, for example. Only or at least in the first 20% or only or at least in the first half of its travel from the unlocked position in its locked position, braked is, whereby the final speed of the bolt is already reduced upon reaching its locking position and its velocity. In addition, this is the door lock particularly Low maintenance, as stop forces are reduced when reaching the locking position.
  • the additional braking device is disposed within the door lock housing.
  • the braking device is designed such that it exerts no braking force on the bolt in relation to the bolt stroke between its unlocked position and locking position (ie the difference between the door lock housing projecting length of the bolt in the two aforementioned dead center positions) when positioning the bolt in the region of its locking position For example, in the range of the last 2% or the last 5% or the last 10% or the last 20% of the travel of the bolt in its locked position.
  • the braking device thus does not counteract the closing force of the locking mechanism in the locking position, which may be general.
  • the braking device is adjustable in its braking force and / or time in its brake-active interaction with the bolt.
  • the braking device may be designed, for example, as a centrifugal brake, frictionally engaged brake or eddy current brake or in another suitable manner.
  • a centrifugal brake can act on a rotationally moved element of the drive mechanism, for example on a shaft which is rotated during movement of the bolt with this movement coupled, for example. Due to a worm gear between bolt and shaft or between shaft and drive.
  • a cable brake may be provided.
  • a transmission as a power transmission member of the drive or coupling mechanism may, for example, a braking device acting on the transmission.
  • a friction brake can act on the latch or a movable element of the drive or coupling mechanism, even on a lever such as. Tooth lever of the drive mechanism.
  • An eddy current brake can, for example, act on a moving, in particular rotationally moved element of the drive mechanism, for example on a shaft which is rotated during movement of the bolt with this coupled in motion, for example. Due to a worm gear between bolt and shaft or between shaft and drive.
  • the electric motor acts at least temporarily as a braking device with respect to the feed of the bolt, starting from its unlocked position into its locking position.
  • the electric motor thus acts in the manner of an engine brake, in particular eddy current brake.
  • the arrangement of an additional braking device is thereby unnecessary, whereby the door lock is inexpensive, low-maintenance and compact in its design. As a result, a particularly quiet operation of the door lock is given, especially when hitting the bolt or attached to this stop in its locked position, which limits a further feed of the bolt.
  • the electric motor having a power electronics, which shorts after switching off the entire control electronics of the motor or possibly after switching off the input voltage for operation of the electric motor, the motor windings to configure the motor as an eddy current brake.
  • the motor control of the electric motor use a generally common regulator intermediate circuit which is configured according to the invention in such a way that the input voltage of the motor and the voltage in the regulator intermediate circuit are monitored by a processor of the motor control.
  • the motor windings for example, in the door lock or in particular provided in the engine control capacitor or another energy storage device. Over the discharge time of the capacitor or energy storage, the engine then acts as a brake direction. It is understood that the mentioned features may possibly also be realized with respect to a separate eddy current brake.
  • the electrical equipment of the door lock in particular the engine control, is preferably connected to the elevator control in a signal-transmitting manner. If the signal for unlocking the door to the electronics of the door lock such as the engine control sent by the elevator control, for example. If a sensor of the elevator control displays the desired position of the elevator car, then the braking device can be activated by the electronics of the door lock, or Motor supply voltage can be switched on. If, for example, the motor supply voltage is switched off by the motor control, then this can be the trigger for the locking process. This includes the function of the engine as an eddy current brake.
  • a motor control can be provided, which generates from a DC input voltage, for example a 24 V DC, a multi-phase, in particular three-phase, three-phase, in particular one with variable frequency and / or variable current, by means of which the motor is operated.
  • the multi-phase or three-phase three-phase current can be a sinusoidal or other suitable three-phase current, for example one with a stepped profile.
  • a 24 V DC voltage is particularly easy to integrate into the electrical system of an elevator system or its control.
  • the door lock on a locking mechanism which after triggering the bolt automatically or forcibly in its locking position extending. So it is only a triggering operation required, and the further V flesh the bolt in its locking position is carried out by preferably continuous discharge or relaxation of an energy storage by the released of this and acting on the bolt force.
  • the energy storage device may be a mechanical storage device such as a tensioned spring element such as a latch reset spring or possibly also another storage device such as an electrical storage or the like.
  • the return spring may be arranged in extension of the bolt.
  • the discharge of the energy storage is activated by the said release.
  • the energy store is preferably part of the door closure.
  • the locking mechanism is thus actuated independently of the drive for the transfer of the bolt in its unlocked position.
  • the locking mechanism is automatically actuated or actuated when a door contact switch coupled in signal-transmitting manner to the locking mechanism emits a signal that the door to be locked by the latch of the given door lock is in a closed position.
  • the door lock according to elevator technical safety guidelines is operable as well as in various disorders such as failure or malfunction of the drive or the drive mechanism of the door lock, failure of the engine control or elevator control or failure of the supply voltage of the engine control or elevator control safe closing of the door lock associated door, in which engages the bolt is ensured.
  • the electric motor and the closing mechanism are coupled with each other in a force-transmitting manner.
  • actuation of the electric motor for the transfer of the bolt in its unlocked position by means of the drive mechanism can at the same time by the electric motor, a voltage or charging of the locking mechanism or its energy storage take place, upon actuation or release of the closing mechanism by means of release of the voltage or charging energy generated in this way, the bolt automatically extends or is transferred into its locking position.
  • the drive mechanism and the locking mechanism may be designed to cooperate, for example. By means of said lever such as. Zahnhebels, or generally, for example.
  • direct or indirect coupling of the drive mechanism to the locking mechanism optionally also by a separate power transmission mechanism.
  • the electric motor with respect to a drive of the bolt in its unlocked position of the locking mechanism acts automatically on the bolt, the latch automatically translates into its locking position.
  • the bolt and thus the locking mechanism is thus held in its unlocked position by the engine power of the electric motor continuously acting on it, so that, for example, the electric motor acts against the closing force of the closing mechanism, for example against the force of a bolt return spring.
  • the current or voltage release or galleylos ein the electric motor can be done via the engine control of the electric motor, which shuts off the engine and thus simultaneously activates the locking mechanism.
  • the engine controller may be configured to drive the electric motor de-energized or de-energized when the engine controller receives a signal to lock the elevator door from an elevator controller associated with the elevator.
  • the elevator controller may be configured to transmit said signal when the elevator controller receives a signal from a door contact switch that the door to be locked by the latch of the given door latch is in a closed position. Even in case of failure or malfunction of the drive can thus close the bolt automatically.
  • the energy storage device of the closing mechanism for automatically or compulsorily transferring the bolt into its locking position such as mechanical storage device, e.g. a return spring, or the closing mechanism as a whole may have a force-displacement characteristic in their voltage or charging, in particular a non-linear force-displacement characteristic.
  • the said force-displacement characteristic can be input to the motor control of the electric motor, in particular in its power control when driving the bolt in its unlocked position by means of the motor power of the electric motor, whereby the bolt predetermined, eg. At least over part of its stroke at a uniform speed, is movable.
  • the engine controller is preferably designed or configured to control or control the performance of the engine as a function of time or as a function of a predetermined operating variable of the bolt, such as its feed position and / or the force to be overcome for a bolt movement.
  • the engine controller is configured or configured to be able to freely control or control the performance of the engine freely by the user.
  • the force applied to the closing mechanism for the voltage or charging thereof in its height and / or in their time dependence during the transfer of the bolt from its locking position into its unlocked position controllable or the electric motor is driven by the engine control in this case accordingly.
  • the power control of the electric motor can thus be done, for example, depending on the force-displacement curve for moving the bolt from its locked position to its unlocked position, for example, in positive correlation, so that with changing force necessary for the passage of the bolt in the respective Timing given position the power provided by the electric motor to the drive mechanism is changed in the same direction with the required force, ie increased or decreased.
  • the bolt by means of the correspondingly configured engine control with a predetermined speed profile on the travel between its unlocking and locking position, which apart from the acceleration and Abbremsvorêtn the bolt in its lifting movement between its unlocking and locking position non-linear or to a constant speed of Bolt can be adjusted, movable, possibly also taking into account a force-displacement characteristic of the locking mechanism in their clamping or charging by means of the electric motor.
  • the door lock is quiet and can be actuated evenly and is particularly low-maintenance, since wear can be reduced.
  • the motor can be operated at a correspondingly higher power in order to move the bolt evenly.
  • An electric motor can be used particularly advantageously for this purpose, in particular in the case of a non-linear force-displacement characteristic of the locking mechanism.
  • the door lock as part of the drive mechanism for the latch, may have a pivotally mounted lever, such as a toothed lever, for transferring the latch between locked and unlocked positions.
  • the energy storage device of the locking mechanism can act directly or indirectly on the latch, for example. Via an additional power transmission mechanism.
  • the motor controller is designed or configured such that upon actuation of the electric motor for Opening the bolt, the engine operation is carried out in a predetermined manner such that on the bolt only over a predetermined travel path of the same on the part of the motor, a driving force is exerted in the direction of the unlocked position.
  • the motor is controlled or is controlled so that the bolt is transferred by means of motor drive from its locking position exactly in its unlocked position. An associated with significant noise striking the bolt upon reaching its unlocked position is thus avoided, whereby the operation of the door lock quietly and by avoiding impact forces, which also cause vibration or vibration of the door lock, the door lock is low maintenance.
  • the motor control is designed or configured such that the number of revolutions of the electric motor during the transfer of the bolt from its locking position can be adjusted to its unlocked position or is set to a preselected value, in particular to non-integer intermediate values.
  • the feed of the bolt from its initial position in the locking position in the direction of its unlocked position and thus also the position of the bolt, which has this in its unlocked position can be adjusted.
  • the engine is thus operated so that no drive force is exerted more on reaching the unlocking of the bolt on reaching the unlocking position of the bolt - or that reaches its unlocked position before reaching the unlocked position by the bolt, taking into account the inertia of the drive system and bolt what can generally be considered within the scope of the invention.
  • the drive mechanism comprises a pivotably mounted lever with at least two legs, which are preferably arranged at an angle to each other, for example, an angle of ⁇ 135 ° or ⁇ 120 ° or about 90 °, wherein a first leg of the lever coupled to the latch and a second leg of the lever to the coupling mechanism couples, which as a part the drive mechanism in turn is connected to transmit power to the drive.
  • the lever also serves as a power diversion of the drive mechanism.
  • the lever engages directly to the force-transmitting to the bolt, possibly also only indirectly with the interposition of another transmission mechanism.
  • the two legs of the lever on a different length wherein the first leg coupled to the latch preferably has a greater length than the second leg, so that the lever also acts as Wegbergersville in relation to the change in position of the bolt.
  • the arrangement of an electric motor has proved to be particularly advantageous, wherein the lever can be maintained as an essential component of a conventional door closure.
  • the door lock is thus inexpensive to produce and easy to convert to the invention training.
  • the control of the lever for changing the position of the bolt is possible by an electric motor in a particularly simple manner.
  • the lever of the drive mechanism may generally be designed as a toothed lever, the toothing is preferably directly in force with the bolt force-transmitting to the longitudinal displacement in engagement.
  • the drive mechanism or the coupling mechanism between the drive and lever on a mechanical decoupling which allows actuation of the emergency release independently of the drive, so that the emergency release is independent of the electric motor manually operable.
  • the emergency release by means of a conventional triangular wrench manually operated.
  • the axis of the lever may have a driver for the emergency release key or the emergency release key acts on the lever or otherwise on the latch via a coupling mechanism.
  • the door lock can be manually operated as needed in case of failure of the elevator or in case of failure or failure of the electric motor or blocking the drive mechanism without a contribution of the electric motor is necessary for emergency unlocking.
  • the mechanical decoupling of the drive can take place, for example, in that the drive mechanism has a freewheel when the emergency unlocking device is actuated.
  • the freewheel can be realized for example by a slot in a linkage part of the drive mechanism, so that a driver moves on actuation of the emergency release without power transmission against the drive direction in the slot.
  • an actuated by the drive cable in the drive train of the bolt may be provided, as preferably described below, being decoupled under actuation of the emergency unlocking cooperating with the cable driver of the drive device of the rope or zugkraftentlastet the rope.
  • an electrically or magnetically actuated decoupling can be provided, so the drive train to the bolt to its unlocked position is always interrupted when the electric motor is not flowed through to actuate the drive mechanism or current flowing only below a predefined current threshold, and wherein current is applied to the electric motor
  • the mechanical coupling member is transferred to its coupling position in the drive train or drive mechanism, for example.
  • an electromagnet By an electromagnet.
  • the angle of rotation of the motor for the transfer of the bolt from its locking position is predetermined determined in its unlocked position.
  • the rotor The motor is thus moved to the locking movement between its two end positions by a fixed angle of rotation.
  • This rotation angle can be determined, for example, by the correspondingly configured engine control.
  • the bolt is due to the given translation of the drive mechanism by changing the position of the motor in a defined manner, for example, moved by a defined distance in the direction of its unlocked position.
  • the electric motor monitoring device such as a switch, which puts the motor de-energized when the bolt in its unlocked position and / or decoupled from the drive mechanism or coupling mechanism.
  • the monitoring device can be actuated directly or indirectly by the bolt.
  • an overload of the motor is avoided when the R i egel has taken its unlocking position and a striking of the bolt at a position defining the unlocking stop is avoided, so that the door lock is actuated quietly.
  • the latch by a Locking device to be held in its unlocked position.
  • a monitoring device which indicates the arrangement of the bolt in its locking position, wherein the electric motor is preferably actuated taking into account the transmission ratio of the drive mechanism with a corresponding, preferably predefined, number of revolutions to transfer the latch from its locking position to its unlocked position, such as described above.
  • the monitoring device can be designed in particular as a switch which is turned on when the bolt is arranged in its locking position, wherein only when the switch is switched on or a signal to the operating device of the elevator for releasing a method of the elevator car is emitted. As a result, the necessary reliability of the elevator is given. Due to the change in position of the bolt in its unlocked position due to the number of revolutions of the electric motor, a particularly simple control of the bolt is given.
  • the monitoring device with respect to the arrangement of the bolt in its locking position may be signal-transmitting connected to the drive control of the electric motor.
  • the engine controller may be configured such that actuation of the electric motor to transfer the latch to its unlocked position occurs only when the monitoring device indicates the location of the latch in its latched position. This ensures that upon actuation of the electric motor for rotation with the preset or preselected number of revolutions of the bolt is transferred exactly in its unlocked position and upon reaching the unlocking position of the engine does not further drive the bolt, which increased reliability is given.
  • the rotary motion of the electric motor can be controlled by a provided deflecting device are transmitted in a translational movement, which acts on the latch or the toothed lever to unlock it.
  • the electric motor act on a suitable cam or eccentric or the like as part of the drive mechanism.
  • the translational movement may be that of a traction mechanism.
  • the traction mechanism can act on a machine element that moves in a rotary manner, such as a lever, for example a toothed lever, which drives the bolt. This allows a low-friction and effective locking movement.
  • the drive mechanism or the coupling mechanism between the electric motor and lever such as toothed lever comprises a cable operated by the electric motor, by means of which the latch is transferred into its unlocked position by actuation of the electric motor.
  • the cable to the opening of the bolt by the electric motor zugkraftbeaufschlagt.
  • the electric motor can operate a winch for this purpose.
  • the cable can attack directly on the lever.
  • the cable can also attack directly on the bolt.
  • the cable allows a simple power transmission or the winch a simple force deflection.
  • the cable can be deflected once or several times, including, for example, pulleys may be provided, whereby the cable guide can be flexibly adapted to the respective structural or spatial conditions of the door lock.
  • the cable can be redirected once or several times in effect of a force transmission mechanism in the direction of the movement of the bolt or lever, for example, toothed lever, wherein one end of the rope can be fixed in place.
  • the cable allows thereby a structural very compact design of the door lock.
  • the cable allows a simple transfer of the rotational movement of the electric motor in a translational movement to act on a linkage part or the Tooth lever of the drive or coupling mechanism.
  • the cable allows a particularly low-friction and quiet operation, so that the door lock is particularly low maintenance.
  • the cable allows a particularly simple decoupling of the electric motor of a part of the drive mechanism or the lever or the bolt, as an interacting with the cable driver of the drive mechanism, which allows a power transmission from the cable from the bolt-facing component, for example by the Driver is arranged in an oversized loop or a deflection of the cable and thus can be zugentkoppelt easily upon actuation of the emergency release of the driver of the cable.
  • the rope is preferably limp. It is understood that, if appropriate, in general, instead of a rope in the narrower sense, another flexible tension member such as a belt, chain or the like can be used.
  • the drive mechanism or coupling mechanism is designed as a traction drive.
  • the electric motor thus acts on a traction mechanism which changes the position of the latch.
  • the drive or coupling mechanism in particular a cable or a coupling linkage thereof, is transferred to its starting position, which has the drive or coupling mechanism to open the bolt under actuation of the electric motor to effect.
  • the cable for the transfer of the bolt is wound in its unlocked position by actuation of the electric motor, so that the electric motor acts as a winch motor, or the rope of the cable is by means of the electric motor relative to the lever such as retracted other part of the drive mechanism or shortened in its effective length to effect unlocking of the bolt, which then unwound under the operation of the locking mechanism, which transfers the latch from its unlocked position into its locking position, the cable or pulled out in its effective length as a drive element of the Drive mechanism is extended to be converted into its initial target position.
  • a new unlocking operation can then be carried out. This is done with only minor friction losses.
  • the electric motor upon actuation of the closing mechanism, is deenergized or acts like a brake device such as an eddy current brake, so that the rotor of the electric motor performs a rotation against the direction of rotation of the electric motor for unlocking the bolt upon actuation of the closing mechanism, for example partially release the rope, ie to lengthen the rope in its effective length.
  • the cable release may consist in a unwinding of a wound rope, the rope is relieved of strain and sluggish.
  • the electric motor by means of a transmission such as.
  • Gear operation preferably a single-stage or possibly multi-stage (gear) gear, coupled to a coupling element such as a cable or a pull rod, wherein the coupling element in turn coupled to the lever of the drive mechanism.
  • the engine preferably couples directly to the transmission.
  • a favorable power transmission from the electric motor is given to the rest of the drive mechanism.
  • this is the engine speed, which is preferably controlled or controlled, adaptable to the kinematics of the drive mechanism.
  • the transmission is also structurally particularly simple design, whereby friction losses are reduced and the door lock is particularly low maintenance.
  • the door lock according to the invention by the arrangement of a status indicator according to claim 18 and / or the arrangement of a status indicator according to claim 19 is formed.
  • the control intermediate circuit of the electric motor can be an intermediate circuit usually provided in electric motors, in particular three-phase motors, which, for example, converts a direct current of a power supply into an alternating current or three-phase current for operating the motor.
  • the electric motor and the coupling mechanism or the drive mechanism is disposed within the door lock housing.
  • the electric motor is protected against external interference and there is a particularly compact design.
  • the door lock according to the invention is suitable for fulfilling the technical standards EN 81-20, EN 81-50 and EN 60947-5-1, each in its version valid as of 1 July 2015, or fulfills these individually or cumulatively.
  • the door lock according to the invention can fulfill the lift-technical test standards EN 81-20 and EN 81-50, respectively in the version of the same with validity as of 1 July 2015, or meets these individually or cumulatively. This applies in each case in particular with regard to the configuration of the blocking means switch or the corresponding electrical safety device and the fault-proofing device, insofar as these are the subject of the standards.
  • the door lock according to the invention is also safety-relevant in other respects Doors such as those of lifting platforms, for cabin doors or the like used.
  • the door lock 1 according to the invention an elevator door has a housing 2 and a latch 3, which under change of position in a locking position with extended latch ( FIG. 1 ) and in an unlocked position with retracted latch ( FIG. 2 ) is convertible, whereby the bolt stroke is defined.
  • a drive is provided, which according to the invention is designed as an electric motor 4 and cooperates with the bolt 3 via a drive mechanism 5 in order to transfer the bolt into its unlocked position.
  • the motor 4 comprises a control 4a, which is signal-transmitting connected to an elevator control, which controls the drive in dependence on the position of an external device such as an elevator car to the To transfer latch in its unlocked position.
  • the electric motor and the drive mechanism 5 or the coupling mechanism 7 described below are arranged within the door lock housing 2.
  • the motor 4 cooperates via a drive mechanism 5 with the latch 3, whereby the latch can be moved into its unlocked position.
  • the drive mechanism 5 comprises a lever or angle lever 6 with two legs 6a, 6b, wherein the first leg 6a of the lever coupled to the latch 3 and the second leg 6b coupled to a coupling mechanism 7 as part of the drive mechanism, which in turn force-transmitting with the drive motor 4 cooperates.
  • the lever is designed here as a toothed lever.
  • the electric motor 4 is coupled by means of a preferably single-stage gear transmission 8 to a coupling element as part of the drive mechanism, wherein the coupling element is designed here as a cable 9.
  • the transmission 8 is arranged to transmit power between the engine 4 and winch 10.
  • the cable 9a is wound on a powered by the engine 4 winch 10 under engine power to transfer the latch from its locking position to its unlocked position, which may be independent of the arrangement of a transmission.
  • the cable 9a of the cable 9 is guided over at least one guide roller 12.
  • the one end of the rope 9b is fixed to the winch 10, the other end of the rope 9c fixed to the housing 2 or other device fixed.
  • the cable works in a kind of power transmission or Weguntersburg.
  • the cable 9a thus acts on the lever 6 by means of the deflection region 9d, the deflection roller 12 is thus eccentric on the lever, more precisely on the second leg 6b arranged to the pivot axis 6c of the lever.
  • the cable 9 is coupled here to the lever or toothed lever, but can also be coupled to another element of the drive mechanism or directly to the latch.
  • the cable 9 is formed such that the cable 9a upon actuation of the locking mechanism 11 by transferring the bolt in its locking position, the cable 9a of the cable partially released, ie the effective length of the cable extended (ie extension of the cable section between its attachment points as the fixing point of the Seilendes example.
  • the cable is partially unwound from the winch 10 to allow pivoting of the lever, whereby the latch 3 is extended to its locking position.
  • the drive mechanism as a linkage mechanism 15 wherein a rigid linkage 16, the electric motor 4 with the bolt or here with the lever 6 coupled force-transmitting to convert the bolt by means of the motor in its unlocked position
  • a linkage mechanism 15 wherein a rigid linkage 16, the electric motor 4 with the bolt or here with the lever 6 coupled force-transmitting to convert the bolt by means of the motor in its unlocked position
  • the rotational movement of the motor by suitable means we, for example, an eccentric or a cam in a translational movement of the linkage parts is transferable.
  • the linkage part is here, for example, provided with a slot 17, into which engages a driver 6d of the lever.
  • the door lock on a locking mechanism 11 which, after its release without the involvement of the motor, the latch 3 forcibly transferred from its unlocked position into its locking position, ie below Relaxation or discharge of an energy store of the closing mechanism.
  • the energy storage is formed here by a latch return spring 12.
  • an emergency release device 13 here in the form of a driver 13a on the axis of the lever 6, the bolt can be manually transferred independently of the drive by means of a Notentriegelungs finallyls in its unlocked position, for example, in the event of a fault.
  • the drive mechanism 5 or the coupling mechanism 7 on a mechanical decoupling which allows actuation of the emergency release independently of the drive, as described above.
  • the decoupling is here by the rope 9a ( FIG. 1 ) or the stem extension hole 17 (FIG. FIG. 4 ), which do not hinder pivoting of the lever when the emergency release is actuated.
  • the electric motor Upon transfer of the bolt from its unlocked position into its locking position by means of the closing mechanism 11, the electric motor is driven without drive in relation to an extension of the bolt, so that the rotor of the electric motor can spin in idle or as described below can act as a braking device.
  • the electric motor is associated with a monitoring device 19 which, when the bolt is arranged in its unlocked position, de-energizes the motor or disconnects it from the coupling mechanism.
  • the monitoring device 19 is designed here as a switch 19a, which cooperates with a contact arranged on the lever 19b.
  • the electric motor 4 is particularly advantageously designed as a three-phase motor, alternatively as a bell motor, so that the motor has a low or virtually no cogging torque, without the invention or the embodiment is limited thereto.
  • the drive mechanism 5 and the transmission 8 are provided in the provision of the drive mechanism 5, if this is therefore moved counter to its drive direction on the bolt, the bolt is thus transferred to its locking position.
  • the drive mechanism consists of rigid elements such as linkage parts.
  • the electric motor has a motor control, by means of which the motor with variable speed and / or variable power can be operated during the transfer of the bolt in its unlocked position or operated.
  • the motor with variable speed and / or variable power can be operated during the transfer of the bolt in its unlocked position or operated.
  • the travel speed of the bolt during its stroke, in particular continuously during its full stroke be controlled or is controlled.
  • the power control of the motor can take into account the force-displacement characteristic of the locking mechanism in order to be able to move the bolt in a predetermined manner during its complete stroke. This is in each case independently or in combination generally preferred within the scope of the invention.
  • the door lock has a braking device 14 which at least temporarily brakes the bolt during its transfer into its locking position.
  • the braking device is formed here in a particular embodiment of the electric motor, which acts as an eddy current brake for deceleration. For this purpose, the windings of the electric motor are short-circuited.
  • the motor control is supplied with DC voltage, which this then in a multi-phase, For example, 3-phase supply voltage for the engine or a static brake voltage transforms.
  • the braking action of the motor takes place in the first region of the transfer of the bolt from its unlocked position into its locking position until the capacitor is discharged.
  • a separate braking device may be provided.
  • the drive mechanism 5 of the bolt 3 and the locking mechanism 11 are coupled such that upon actuation of the drive mechanism for transferring the bolt in its unlocked position, an energy storage of the locking mechanism 6 is tensioned or charged, in the specific example, the latch return spring 12 is tensioned. After release of the closing mechanism 11, the bolt is automatically transferred to release its thus generated spring tension in its locking position.
  • the closing mechanism 11 is signal-transmittingly connected to the elevator control (not shown), so that the closing mechanism triggers on the basis of a signal of the elevator control.
  • the signal of the elevator control can be sent out, for example, when a door contact switch signals the door associated with the latch that the door is closed.
  • the latch 3 is held by the action of the electric motor 4 in its unlocked position, the motor thus operates against the restoring force of the locking mechanism and the return spring.
  • the signal of the elevator control is transmitted to the motor control, which sets the electric motor current or de-energized, so that the engine no longer delivers drive power.
  • the motor counterforce is then lifted against the locking mechanism and the latch automatically transferred to the spring position, ie by the spring force, in its locking position. It is understood that the same generally applies to another energy storage.
  • the locking mechanism is coupled to the drive mechanism or coupling mechanism such that upon transfer of the latch to its latching position, the latch mechanism transfers the drive mechanism or coupling mechanism to an initial position in which the latch is to initiate its unlatching movement.
  • a monitoring device 18, here in the form of a blocking means switch is provided, which indicates the arrangement of the bolt in its locking position.
  • the blocking means switch is designed as a positively opening switch.
  • the electric motor or its motor control is configured to transfer the latch only its locking position in the unlocked position when the monitoring device indicates the position of the bolt in its locked position.
  • the bolt acts here via a transmission mechanism 18a, for example.
  • a transmission mechanism 18a for example.
  • the door latch includes a misfire lock (not shown) which prevents switching of the latch switch when the door is open and / or the latch is closed.
  • the bolt passes between its locking position and its unlocked position a hub, which is about 25 mm here.
  • the engagement depth of the bolt in the locking position in the door is here up to 21 mm to realize the prescribed engagement depth of at least 7 mm before switching the blocking means switch and the inevitable function of the miss-shooter and a sufficient contact stroke.
  • a status display (not shown) is provided, for example, in the form of an LED display, which indicates at least one or more or all of the status of the door lock: (i) the processor of the motor control is switched on, (ii) the voltage in the control intermediate circuit is at its desired value, (iii) the input voltage of the (iv) the latch is in its unlocked position, (v) there is a voltage drop across the motor control input relative to its minimum allowable voltage, (vi) there is no voltage on the motor control.
  • a status display which comprises at least one or more or all of the indicators of the following group: (i) there is no input voltage to the electric motor or the motor control is defective, (ii) the electric motor is too low or not predetermined (Iii) on the electric motor is an AC voltage instead of the intended DC voltage, or generally a non-operationally proper voltage, (iv) the locking bolt is pulled against its desired position at least partially in the direction of its locking position or is contrary to the intended normal operation of the door lock is not or only partially transferred to its unlocked position, (v) the bolt is not transferred contrary to the intended setting of the locking mechanism in its locking position, wherein the Operating voltage of the electric motor is not switched off, (vi) the bolt is not transferred contrary to the setting of the locking device in its locking position, wherein the electric motor according to the engine control is de-energized.
  • the door lock according to the invention fulfills the elevator test standards EN 81-20, EN 81-50 and EN 60947-5-1. All features of the embodiments are hereby disclosed as independent and independent of the further features of the embodiments.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Lock And Its Accessories (AREA)
EP16192658.9A 2015-10-08 2016-10-06 Verrouillage de porte Active EP3153454B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015105331.2U DE202015105331U1 (de) 2015-10-08 2015-10-08 Türverschluss

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EP3153454A1 true EP3153454A1 (fr) 2017-04-12
EP3153454B1 EP3153454B1 (fr) 2019-08-14

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DE (1) DE202015105331U1 (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109573795A (zh) * 2018-12-26 2019-04-05 浙江理工大学 一种螺杆式驱动的电梯门锁装置及其锁解方法
US11390492B2 (en) 2018-05-01 2022-07-19 Otis Elevator Company Method and assembly for positioning an elevator door interlock

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1440930A2 (fr) * 2003-01-15 2004-07-28 Hans & Jos. Kronenberg GmbH Serrure de porte à déverrouillage de secours
EP2295679A2 (fr) * 2009-09-14 2011-03-16 K.A. Schmersal Holding GmbH & Co. KG Dispositif de verrouillage pour un composant destiné à la fermeture d'une ouverture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1440930A2 (fr) * 2003-01-15 2004-07-28 Hans & Jos. Kronenberg GmbH Serrure de porte à déverrouillage de secours
EP2295679A2 (fr) * 2009-09-14 2011-03-16 K.A. Schmersal Holding GmbH & Co. KG Dispositif de verrouillage pour un composant destiné à la fermeture d'une ouverture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11390492B2 (en) 2018-05-01 2022-07-19 Otis Elevator Company Method and assembly for positioning an elevator door interlock
CN109573795A (zh) * 2018-12-26 2019-04-05 浙江理工大学 一种螺杆式驱动的电梯门锁装置及其锁解方法
CN109573795B (zh) * 2018-12-26 2023-05-16 浙江理工大学 一种螺杆式驱动的电梯门锁装置及其锁解方法

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EP3153454B1 (fr) 2019-08-14
ES2750603T3 (es) 2020-03-26

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