EP4234470A1 - Trigger unit for a catching device - Google Patents

Abstract

The present invention relates to a triggering device (10) for a safety gear (20) of an elevator system, comprising a support frame (1), a triggering element (2) arranged to be axially movable in the support frame and having a release element (2) arranged at the end and extending through an end section (1a) of the support frame (1) extending release rod (3) for connection to an engagement lever (21) of the safety gear (20), spring means (4a, 4b) for applying a prestressing force to the release element (2) at least in a first holding position (H), and magnetically acting holding means (5a , 5b, 6a, 6b), which are designed to hold the triggering element (2) in the holding position (H), preferably with a power supply, against the applied prestressing force, with the triggering element (2) being designed as a preferably frame-like carriage element which has two axial direction of movement extending guide rails (7a, 7b) for guiding the slide element (2) in the carrier frame (1) and a connecting rail (8a) arranged perpendicularly to the guide rails and connecting them for mounting the release rod (3).

Description

The present invention relates to a triggering device for a safety gear of an elevator system.

Catching devices for elevators are known and are used in particular to prevent the elevator car from falling or falling over if the suspension element breaks. For this purpose, the safety gear usually has a braking device, for example in the form of a so-called safety tongs with brake shoes, which grip a guide rail of the elevator car and, if the safety gear is triggered, clamp themselves on the guide rails. A speed limiter assigned to the safety gear monitors a lifting and/or lowering speed of the elevator car and triggers the safety gear if a predetermined tolerance value is exceeded. The overspeed governor is usually independent from other components of the elevator system and is mechanical, which ensures proper operation even in the event of a power failure. The overspeed governor comprises a steel cable designed as a cable sling, which runs between a deflection pulley at the lower and an upper end of the elevator shaft, with one of the deflection pulleys being provided with a centrifugal force-controlled monitoring unit, which blocks the steel cable if the deflection pulley rotates too quickly, thereby using a engagement lever connected to the rope sling triggers the safety gear.

Newer technologies provide for electronic monitoring of speed, e.g. B. the safe box with a safe position sensor Limax33RED, which was launched by ELGO in 2015, or further developed compact sensors, such as e.g. B. Products of the LimaxCP series. The safe electronic signal that is generated to trigger a safety gear must be converted into a safe mechanical movement using suitable devices become. For safety devices of z. B. Wittur ESG or Dynatech eASG on an electromagnet that keeps the gripper open against a spring and triggers the safety gear when the electromagnet is de-energized.

However, these solutions available on the market have the disadvantage that they cannot be used with conventional safety gears and thus require a complete redesign of the safety gear. Replacing the entire safety gear for existing elevator systems is therefore complex and costly.

Likewise, triggering units for conventional safety gears are now known, which enable the safety gear to be triggered in an emergency independently of a mechanical speed limiter with a cable sling. The triggering unit required for this is magnetically operated and, when triggered, enables the necessary provision of a tensile force of, for example, 300N and a lifting movement of up to 100mm for the correct triggering of a conventional safety gear.

The CN 111 731 964 A discloses such a tripping unit for a safety gear of an elevator installation for replacing a conventional speed limiter, comprising a holding frame, a tripping element guided in an axially movable manner in the holding frame with a tripping rod attached to it at the end and extending through one end of the holding frame for connection to the safety gear, and a tripping rod coaxial with the tripping rod arranged compression spring as a restoring element for biasing the trigger element in a first holding position. Here, the triggering element is activated against the applied spring force by means of the interaction of a magnetically acting first connecting element in the form of a metal strip arranged on the triggering element and a second connecting element in the form of controllable ones arranged on a clamping slide of the device Magnetic means held, the latter releasing the triggering element with a corresponding control signal, which then triggers the safety gear by means of an axial stroke movement of the triggering rod caused by the compression spring. For a return from this second, released position to the holding position, a lifting unit that can be moved independently of the release element is provided, which enables an axial movement of the clamping carriage and the second connecting element attached to it at the end in the holding frame and relative to the release element, with the interaction of the first and second connecting element the triggering element can be retracted from the triggered position to the holding position.

The WO 2020/134225 A1 discloses a further tripping unit for a safety gear comprising a magnetically conductive frame unit with a magnetic cavity formed therein and a permanent magnet guided axially movably therein, having a retaining rod extending axially out of the cavity for connection to a tripping rod of the safety gear. The magnetically conductive frame assembly is provided with a coil winding with opposite ends of the magnet abutting first and second side portions of the winding. When power is supplied to the coil winding, the magnet and the tripping rod connected thereto are moved axially into a first holding position, against a biasing force of an external spring device arranged between the tripping unit and the safety gear, as a result of which the safety gear is opened. If an abnormal condition of the driver's cab is detected, the power supply to the coil winding is interrupted, as a result of which the magnet, which is guided in the magnetic cavity, is moved by the spring force to a tripping position of the safety gear.

The solutions known from the prior art are structurally complex and/or have the disadvantage of an increased maintenance effort. Proceeding from the known prior art, the invention is therefore based on the object of providing an improved triggering unit for a safety gear which addresses these disadvantages of the prior art and at least partially eliminates them. In particular, a triggering unit is to be provided which is structurally simple and at the same time enables effective and reliable triggering of a conventional safety gear without the need to connect a conventional mechanical speed limiter. The invention also addresses or provides the solution to other problems, as will become apparent from the description below.

The underlying problem is solved by the independent claim. Advantageous developments of the invention are specified in the dependent claims.

The invention relates to a tripping unit for a safety gear of an elevator system, in particular as a replacement for a conventional speed limiter, comprising a carrier frame, a tripping element arranged to be axially movable in the carrier frame with a release rod arranged at the end and extending through an end section of the carrier frame for connection to the safety gear, spring means for loading of the triggering element with a prestressing force at least in a first holding position, as well as magnetically acting holding means, which are designed to hold the triggering element in the holding position, preferably when power is supplied, against the applied prestressing force, with the triggering element being designed as a preferably frame-like carriage element which has two axially Direction of movement extending guide rails for guiding the carriage element in the support frame and arranged perpendicular to the guide rails and connecting these connecting strip for mounting the release rod.

The arrangement according to the invention provides a structurally simple design of the device that is significantly more reliable than the prior art. In this case, an elongate guide extending in the direction of movement can be provided in the carrier frame by the two lateral guide strips, which in particular prevents tilting and/or canting of the triggering element in the carrier frame. The preferred frame-like construction provides a stable but at the same time weight-optimized design, which in particular minimizes undesirable effects of inertia when triggered.

The guide rails preferably extend from the connecting rail in a direction opposite to a direction of extension of the release rod. In other words, the guide rails preferably extend from a side of the connecting rail facing away from the release rod. The length of the guide rails in the direction of movement of the carriage element is at least twice, more preferably three times, more preferably a multiple of the thickness or length of the connecting rail in the direction of movement. The length of the guide strips is preferably between 1 and 20 cm, more preferably between 2 and 15 cm.

The guide rails are advantageously mounted in two opposite sides of the support frame. The guide rails can be mounted so that they can move axially in the support frame by means of a tongue/groove connection provided. For example, the guide rails can have integrally formed ribs or tongues which engage in corresponding longitudinally formed grooves of the support frame.

The magnetically acting holding means are designed to hold the triggering element in the holding position, preferably under current supply, against the applied prestressing force. Under holding position is understood here as a ready-to-operate open position of the triggering element, ie in which the triggering device does not trigger or close an associated safety gear. Furthermore, the holding means are designed to release the triggering element when the holding means is de-energized, as a result of which it is moved from a holding position to a triggered position by the applied pretensioning force. This leads to an axial lifting movement of the release rod, as a result of which an engagement lever of a braking device or braking unit of the safety gear connected thereto can be brought from an open position into a closed or braking position. The braking device can encompass a guide rail and/or engage in it in a manner known per se and, when triggered by the engagement lever, lead to the brake shoes of the braking device being applied or clamped to the guide rail.

In the triggered state, the triggering element can then preferably also be moved back from a triggered position to a holding position using the magnetically acting holding means, as a result of which the safety gear is opened again or the braking device of the safety gear can be transferred from a closed position to an open position. In this case, the triggering device is preferably designed in such a way that when the triggering element is reset from the triggered position to the holding position, the triggering element is not blocked in the direction of the triggered position. This means that the triggering element can be moved unhindered from the holding position to the triggered position and/or from an intermediate position between the holding position and the triggered position to the triggered position even during the return to the holding position in the event of a possible renewed triggering. A force is applied to the triggering element for movement or return from the triggered position to the holding position while leaving an axial freedom of movement of the triggering element between the holding position and the triggered position.

For a corresponding activation of the triggering device and in particular the holding means, the triggering device preferably comprises a control unit assigned to the holding means or is designed for connection to a corresponding control unit.

The connecting strip is preferably designed for the axially fixed mounting or connection of the release rod to the frame-like carriage element. This means that the release rod is arranged or mounted on the connecting strip in such a way that the release rod is arranged immovably or rigidly in the axial direction with respect to the carriage element. Alternatively, the release bar can be mounted in the connecting bar with little axial play.

The connecting strip preferably has an integrated bearing element, in which an end section of the release rod is preferably at least partially rotatably and/or tiltably mounted. In addition or as an alternative, the tripping rod can be mounted in the bearing element with little radial play and can therefore be radially displaced. In contrast to the prior art, in which the release rod is screwed into a corresponding counterpart and is therefore fixed without any degree of freedom, the design according to the invention enables a significantly optimized mounting of the release rod with a predefined clearance or with predefined degrees of freedom. As a result, the system stability, in particular also the resilience in the event of radial and/or rotational forces being applied to the release rod, is significantly increased and the maintenance effort for the device is thus minimized.

The bearing element is preferably designed as a recess and/or projection in the connecting strip, which engages in a preferably circumferential groove of a lateral surface of the end section of the release rod. In a preferred embodiment, the bearing element can have a recess with variable Having an inner diameter, a first area of the recess having an enlarged inner diameter for receiving and/or at least partially passing through the release rod, and a second area of the recess having a reduced inner diameter for axially fixed mounting of the release rod.

The release rod is also preferably guided through an opening or a preferably round bore in the end section of the support frame. In this case, the opening can form an axial bearing and/or allow a predefined radial clearance for the release rod in the end section of the support frame.

Furthermore, the slide element preferably has a rear frame strip arranged parallel to the connecting strip on a side facing away from the release rod. In this case, the frame strip is arranged orthogonally to the guide strips in a plan view of the carriage element.

The carriage element is preferably designed as an inserted frame element. This means that the frame element is not formed with the aid of screw and/or adhesive connections. This provides a very robust design of the frame element, which can further reduce the maintenance effort. The individual frame strips are preferably arranged plugged into one another by means of provided projections, recesses and/or recesses. For example, the guide rails of the carriage element can each have recesses arranged opposite one another, in which projections of the connecting rail and the rear frame rail engage.

The spring means of the triggering device preferably comprise two compression springs extending laterally of the frame-like carriage element. As a result, in contrast to the prior art, in which a central spring is arranged coaxially to the release rod, which further increases the stability and running properties of the release element. In addition, due to the lateral arrangement, relatively long springs can be used, which increases reliability and, in particular, minimizes the risk of spring breakage. Furthermore, the use of compression springs ensures reliable operation of the triggering device even if the spring breaks. The compression springs are preferably arranged in such a way that they extend between an end section of the support frame that faces the safety device and an end section of the carriage element that faces away from the safety device.

The guide rails and/or the rear frame rail can have laterally protruding stop elements for the spring means. In a particularly preferred embodiment, projections on the rear frame strip, which engage in recesses in the guide strips, form the laterally projecting stop elements.

In a preferred embodiment, the magnetically acting holding means preferably comprise two electromagnets arranged between the triggering element and a side of the support frame facing the safety gear, which apply a holding force to the connecting strip of the triggering element when current is supplied. The triggering device here preferably comprises a clamping carriage that can be moved axially independently of the triggering element, in the first end section of which the electromagnets are arranged and which is designed to bring the triggering element back from a triggered position to the holding position. The clamping carriage is preferably movably mounted on both sides in the carrier frame by means of guide rails or the like.

In an alternative embodiment, the magnetically acting holding means preferably comprise two fixed positions in the support frame and coil formers arranged opposite one another for cooperation with a permanent magnet arranged on the triggering element in between thereto. The coil bodies and the permanent magnet are designed and arranged in such a way that the coil bodies allow an axial movement of the permanent magnet and thus the triggering element in the direction opposite to the biasing force and a holding of the triggering element in the holding position when power is supplied. In this case, the permanent magnet is preferably arranged immovably on the triggering element and can be fastened to the triggering element by means of appropriately provided fastening means. In this case, the pole orientation of the permanent magnet is preferably aligned perpendicularly to a winding direction of the coil body. As soon as the power supply to the coil formers is interrupted, in particular if an abnormal operating state of the elevator car is detected, the holding force on the triggering element is stopped by the coil formers and the triggering element moves into the triggered position. A reset takes place here by renewed power supply to the coil bodies.

In a preferred embodiment, the triggering device comprises position detection means, which enable a continuous position detection of the axially movable triggering element and/or an axially movable clamping slide in the carrier frame. As a result, a current or actual position of the movable components of the triggering device and thus an optimized control of the individual components and in particular the holding means can take place. The position detection means preferably include several Hall sensors arranged along the direction of movement of the movable components, for example in or on an associated cover or housing element of the triggering device, which interact with magnetically acting position tags arranged on the movable components.

In a further aspect, the invention relates to a safety gear comprising a in or on a guide rail of an elevator car guided braking device and a preferably at least partially rotatable engaging lever connected thereto for triggering the braking device, and a triggering device connected to the engaging lever, as previously described.

The safety gear can be arranged on an elevator car in a manner known per se. In this case, the release device is preferably arranged or aligned essentially parallel to a direction of longitudinal extension of the guide rail of the elevator car with respect to a direction of movement of the release bar. The engagement lever can preferably extend essentially perpendicularly to the direction of movement of the release rod, with it being articulated on a first end section on the elevator car and being connected to the braking device or braking unit at a second end section opposite thereto. The trip bar is connected to the engagement lever at an intermediate position between the pivot and the braking device such that axial movement of the trip bar results in rotational movement of the engagement lever about the pivot.

At the connection point between the release rod and the engagement lever, the release rod can have a slotted hole extending in the direction of movement, in which a bolt or safety pin of the engagement lever is at least partially movably mounted. The elongated hole can advantageously be designed and arranged such that in a holding position of the triggering device, the bolt rests against an end stop of the elongated hole, so that triggering the triggering element leads directly to force transmission to the engagement lever. However, when the triggering element is reset, the triggering rod can be moved at least partially independently of the engagement lever through the elongated hole, thereby enabling optimized release of the safety gear.

In a preferred embodiment, the safety gear comprises a deflection unit which is designed to convert an axial movement of the release rod into a rotation of a connecting rod of the safety gear, the connecting rod being further advantageously designed for connecting at least two braking devices to the release device. The connecting rod can be a square profile, for example, with which a respective engagement lever of a braking device can be directly connected at one end. This means that the engagement lever is preferably not additionally connected at a joint to the elevator car or to a holding structure arranged thereon, but instead a rotation of the connecting rod is transmitted directly and preferably without translation to the engagement lever. At least two braking devices or braking units can preferably be connected to a triggering unit by means of the deflection unit.

According to the invention, the safety gear thus preferably comprises at least two braking devices or braking units, each with associated engagement levers, which are connected to a single common triggering device. This significantly reduces the risk of the elevator car tilting in the guide or in the elevator shaft when the safety gear is triggered, especially since, in contrast to the prior art, no two separate triggering devices have to be provided on the car, which reduces the risk of delayed triggering and thus a partial canting brings with it.

Furthermore, the deflection unit is preferably designed in such a way that it enables the triggering device to be attached essentially horizontally to the elevator car. This means that the triggering device is arranged in such a way that the axial direction of movement of the triggering element is aligned essentially horizontally on the elevator car. This eliminates an influence from external Acceleration forces minimized, especially in an abnormal system state, which can counteract a triggering of the device in the case of triggering. As a result, the necessary holding and triggering forces of the triggering device can be designed to be somewhat weaker or smaller, which enables a cost-effective and energy-efficient construction.

In a preferred embodiment, the safety gear is also designed to brake the elevator car in a first and a second direction of movement or acceleration opposite thereto.

The triggering device preferably comprises a guide cage arranged on the triggering rod with a running surface facing the triggering device or the housing or the support frame of the device and a rotating element mounted therein, in particular a knurled wheel, for connection to an engagement lever of the braking device. The rotation element and the guide cage are preferably arranged and designed in such a way that a guide rail of the elevator can be arranged or guided between the running surface and an end section of the carrier frame of the triggering device. The rotary element and the guide cage are advantageously arranged and designed in such a way that when the triggering device is triggered, the rotary element presses against a guide rail of the elevator car and rolls on it in a direction essentially orthogonal to a direction of extension or movement of the trigger rod and/or that the Rotating element jammed between the running surface and the guide rail.

The guide cage at least partially enables a movement of the rotary element in a direction orthogonal to the direction of movement of the release rod within predefined limits. In particular, the guide cage can have an upper and lower stop or a Have movement restriction, which limits a movement of the rotary member orthogonal to the axial direction of movement of the trip bar to a predefined range. For example, the guide cage can have an essentially concave running surface which, starting from a central neutral position for the rotating element, runs on both sides or upwards and downwards at an angle or tapering towards the guide rail.

The design according to the invention makes it possible to provide a triggering device which can trigger in both directions of movement of the elevator car, i.e. in the event of an unwanted acceleration of the elevator car both downwards and upwards. Instead of at least two triggering devices for each of the possible, undesired directions of acceleration of the elevator car, only a single triggering device can now be provided, which covers both triggering directions.

In this embodiment, the rotary element or the knurled wheel is preferably connected directly to the engagement lever of the braking device, in particular on a rotary axis of the rotary element.

In this embodiment, the release device can preferably be or is arranged horizontally on the elevator car with respect to the axial movement direction of the release rod. The direction of movement of the release bar of the release device can be or is arranged essentially orthogonally to the guide rail of the elevator car.

In a further aspect, the present invention relates to an elevator system having an elevator car guided in an elevator shaft and a release device and/or safety device as described above. The elevator system essentially includes vertically running guide rails for the elevator car for contacting a respective braking device of the safety gear. The elevator system also includes a control unit, which is designed to control the triggering device when the elevator system is in an abnormal operating state.

Fig.1:

eine bevorzugte Ausführungsform der erfindungsgemäßen Auslösevorrichtung in Seitenansicht;

Fig. 2a-d:

perspektivische Seitenansichten einer bevorzugten Ausführungsform der Auslösevorrichtung in unterschiedlichen Betriebszuständen;

Fig. 3:

perspektivische Seitenansicht einer weiteren bevorzugten Ausführungsform der Auslösevorrichtung;

Fig. 4a,b:

perspektivische Seitenansicht einer ersten bevorzugten Ausführungsform der erfindungsgemäßen Schlitteneinheit;

Fig. 5a,b:

perspektivische Seitenansicht einer zweiten bevorzugten Ausführungsform der erfindungsgemäßen Schlitteneinheit;

Fig. 6:

eine Detailansicht einer bevorzugten Verbindung der Auslösevorrichtung mit einer Bremseinheit der Fangvorrichtung;

Fig. 7a-c:

unterschiedliche Ansichten einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Fangvorrichtung;

Fig. 8a-c:

unterschiedliche Ansichten einer bevorzugten Ausführungsform der erfindungsgemäßen doppelwirkenden Fangvorrichtung; und

Fig. 9:

eine weitere bevorzugte Ausführungsform der erfindungsgemäßen doppelwirkenden Fangvorrichtung.

Details, further advantageous effects and details of the present invention are explained below with reference to the schematic drawings, which are merely exemplary. Show in it:

Fig.1:

a preferred embodiment of the triggering device according to the invention in side view;

Fig. 2a-d:

perspective side views of a preferred embodiment of the triggering device in different operating states;

Figure 3:

perspective side view of a further preferred embodiment of the triggering device;

Fig. 4a,b:

perspective side view of a first preferred embodiment of the carriage unit according to the invention;

Fig. 5a,b:

perspective side view of a second preferred embodiment of the carriage unit according to the invention;

Figure 6:

a detailed view of a preferred connection of the triggering device with a braking unit of the safety gear;

Fig. 7a-c:

different views of a further preferred embodiment of the safety gear according to the invention;

Fig. 8a-c:

different views of a preferred embodiment of the double-acting safety device according to the invention; and

Figure 9:

another preferred embodiment of the double-acting safety gear according to the invention.

Fig.1 shows a preferred embodiment of the triggering device 10 according to the invention of a safety gear 20 in a side view. The triggering device 10 comprises a preferably elongate housing 60 with a triggering rod 3 of a triggering element 2, described in more detail below, extending therefrom in the axial direction attached thereto support member attached. In the embodiment shown, the release device 10 is arranged vertically on the elevator car 70 with respect to an axial direction of movement of the release bar 3 . The triggering device 3 is connected to a braking device or braking unit 30 by means of an engaging lever 21 . The engaging lever 21 is here articulated with a first end section 21a on the cab 70 and is connected with a second end section to a preferably pivotable brake shoe 31 of the brake unit 30 . The brake unit 30 is guided on or in a fixed guide rail 50 of the elevator car or the elevator system and enables a braking force to be transmitted from the brake unit 30 to the guide rail 50 when the safety gear is triggered.

In the event of a tripping of the tripping unit, an axial movement F1 of the tripping rod 3 takes place, which, through the connection of the tripping rod 3 to the engaging lever 21 at a point intermediate to the first and second end-side sections 21a, 21b, results in a rotational movement R of the engaging lever 21 about the joint 21c leads. A stroke h of the release rod is preferably up to 50 mm, particularly advantageously between 10 mm and 20 mm.

As in 1 shown in broken lines, this causes the brake shoe 31 to pivot from a neutral position into a braking position and in the process against the guide rail 50 . This is then pressed against a further brake pad 32 arranged opposite. A contact pressure and thus the desired deceleration when braking can be adjusted by means of an associated spring assembly 33 (see also detailed view in 6 ).

Figure 2a -d show perspective side views of a preferred embodiment of the triggering device 10 in different operating states.

The triggering device 10 comprises a support frame 1 with a first end section 1a and a second end section 1b lying opposite thereto. An axially movable carriage element is movably mounted in the carrier frame 1 as a release element 2 , the release rod 3 arranged at the end on the release element 2 extending through the end section 1 a of the carrier frame 1 . For this purpose, the end section 1a has a bore 1c as an axial bearing for the release rod 3.

The carriage element 2 can be at least between a release-ready holding position H ( Figure 2a ) and a triggered position A ( 2b, 2c ) can be moved. Laterally arranged spring means 4a, 4b are provided between the end section 1a and the triggering element 2, which apply a pretensioning force to the carriage element 2, which is aligned in a direction opposite to a direction in which the triggering rod 3 extends.

In the holding position H, the movable carriage element 2 is held by holding means 6a, 6b, which are arranged between the end section 1a of the carrier frame 1 and the carriage element 2. In the present embodiment, the holding means 6a, 6b are designed as electrically controllable magnets or as electromagnets which, when current is supplied, cause a magnetic force on the carriage element 2, counter to the applied prestressing force of the spring means 4a, 4b. At least in the holding position H, this magnetic force is higher than the force of the spring means 4a, 4b.

As soon as a control unit (not shown) connected to the triggering device or integrated therein receives a triggering signal, the holding means 6a, 6b are de-energized, causing the carriage element 2 to move from position in Figure 2a shown holding position H to the in Figure 2b shown triggered position A is moved. The released position is preferably not limited by a rear stop in the support frame. This means that the support frame 1 is preferably designed in such a way that the trigger or carriage element 2 has sufficient axial freedom of movement for reliable triggering and the necessary stroke associated therewith.

To reset the carriage element 2, the triggering device 10 in this exemplary embodiment comprises a clamping carriage 15 that can be moved axially independently of the triggering element 2. This has a first end section 15a, in which the magnetically acting holding means 6a, 6b are arranged. The end section 15a also has a recess or a bore 23 for the tripping rod 3 to pass through without contact. A second, opposite end portion 15b is preferably connected to drive means such as a spindle motor 15c. The clamping carriage 15 is mounted so that it can move axially parallel to the carriage element 2 in the carrier frame 1 and is designed in such a way that the release element 2 interacts with the magnetically acting holding means 6a, 6b from a released position A as in FIG Figure 2b shown to return to the holding position H.

For this purpose, for example, the clamping carriage 15 is moved from the initial end position in the carrier frame by an assigned control unit, as shown in FIG Figure 2a shown moved towards the triggering element 2, which is in the triggered position, by the drive means 15c (cf. intermediate position Figure 2b ), preferably until the holding means 6a, 6b of the tensioning carriage 15 touch the triggering element 2 or are at least adjacent to it (cf. 2c, 2d). Fig. 2d shows this is a rear view of the triggering device 10, with the triggering element 2 being in the triggered position and the clamping slide 15 being in the extended position or in the position in contact with the triggering element 2.

The holding means 6a, 6b are then supplied with current, so that a magnetic force acts on the triggering means. The clamping carriage 15 is then brought back into the initial end position in the carrier frame 1 by the drive means 15c, with the applied magnetic force pulling the tripping unit 2 along and bringing it into its holding position, as shown in FIG Figure 2a shown.

In the resetting described above, the tensioning carriage 15 always moves on a side of the release unit 2 facing the release rod 3; a rear area thereto is not blocked or adjusted by the tensioning carriage. As a result, the correct operation of the triggering device can always be guaranteed even when the triggering unit is reset.

The triggering device 10 can preferably provide continuous position detection of the axially movable triggering element 2 and/or of the axially movable clamping slide 15 in the carrier frame 1 by means of position detection means 17 provided for this purpose. In this case, the position detection means can comprise a plurality of sensors 17a, preferably arranged in series in or on the support frame 1 or on the housing 60, for example Hall sensors, as shown by way of example in Figure 2c shown. The Hall sensors can, for example, detect magnetically detectable and/or evaluable tags 17b arranged on the triggering element 2 and/or on the clamping slide 15 and thereby determine the respective position of the component along the possible axial range of motion.

3 FIG. 14 shows a side perspective view of another preferred embodiment of the triggering device 10, with the housing 60 omitted for the sake of clarity. 3 shows an embodiment in which the magnetically acting holding means comprise two coil formers 5a, 5b arranged in a fixed position and opposite one another in the carrier frame 1, wherein in 3 the front bobbin is shown cut away for clarity. Both coil bodies 5a, 5b are aligned parallel to one another and preferably extend over the entire length of the support frame 1. The triggering element 2, on which at least one permanent magnet 16 is arranged, is arranged between the coil bodies 5a, 5b. The coil bodies 5a, 5b and the magnet 16 are arranged and designed in such a way that, when power is supplied, the coil bodies 5a, 5b cause an axial movement of the triggering element 2 in the direction counter to the prestressing force of the spring means 4a, 4b and hold the triggering element 2 in a holding position H make possible.

In the 3 The position shown corresponds to a triggered position of the triggering element 2. To return to the holding position, the coil bodies 5a, 5b are supplied with current, so that the triggering element 2 moves in the direction of the end section 1a of the support frame 1 (axial movement F2). With further current being applied to the coil body 5a, 5b, the tripping element 2 can then be held in the holding position against the biasing force of the springs 4a, 4b. In addition, the device can have at least one or two electrically controllable magnets 5c, 5d, which are arranged on the end section 1a of the carrier frame 1, and which can alternatively or additionally be energized in order to hold the triggering element 2 in the holding position.

Figures 4a , b show a preferred embodiment of the triggering or carriage element 2 according to the invention for the device as in FIG Figures 2a-2d shown. The carriage element 2 is preferably as frame-like carriage element is formed, which has two guide strips 7a, 7b extending in the axial direction of movement for guiding the carriage element 2 in the carrier frame 1 and a connecting strip 8a aligned orthogonally thereto for mounting the release rod 3. The guide strips 7a, 7b extend from the connecting strip 8a in a direction L1 opposite to a direction L2 of the release rod 3. On a side facing away from the release rod 3, a rear frame strip 8b is arranged parallel to the connecting strip 8a.

The carriage element 2 is preferably designed as an inserted frame element, in which the individual frame strips 7a, 7b, 8a, 8b are inserted into one another by means of projections, recesses and/or recesses provided. The guide rails 7a, 7b of the carriage element 2 can, for example, each have oppositely arranged recesses 12a, 12b, into which projections 13a, 13b of the connecting strip 8a and the rear frame strip 8b engage.

The connecting bar 8a here comprises an integrated bearing element 9, in which an end section 3a of the release rod 3 is preferably at least partially rotatable, radially displaceable and/or tiltable. The bearing element 9 can be designed as a recess in the connecting strip 8a, which engages in a preferably circumferential groove 11 of a lateral surface of the end section 3a of the release rod 3. The bearing element 9 can also have a recess with a variable inner diameter, with a first area 9a of the recess having an inner diameter for receiving and passing through the release rod 3 and a second area 9b of the recess having a reduced inner diameter for axially fixed mounting of the release rod 3. After being inserted into the bearing element 9, the release rod 3 can be held in the area 9b by means of a correspondingly provided securing element 9c. The guide rails 7a, 7b and/or a rear frame rail 8b can have laterally projecting stop elements 14a, 14b, against which the spring means 4a, 4b bear.

Figure 5a , b show a second preferred embodiment of the carriage unit 2 according to the invention for the device as in FIG 3 shown. The slide element is similar to the element according to FIG 4a, 4b constructed, but has in a central area at least one permanent magnet 16, which is designed to interact with the coil formers 5a, 5b of the holding means.

The bearing element 9 in this embodiment can comprise a bore into which the end section 3a of the release rod 3 can be inserted. The securing element 9c can be a two-part panel element which can be selectively fastened to the connecting strip 8a in such a way that two opposite, for example semicircular, recesses engage in a groove 11 of a lateral surface of the end section 3a of the tripping rod 3.

6 shows a detailed view of a preferred connection of the triggering device 10 to a braking unit 30 of the safety gear 20. As shown here, the triggering rod 3 at the connection point with the engaging lever 21 can have a slotted hole 24 extending in the direction of movement, in which a bolt 24a of the engaging lever 21 is at least partially is movably mounted.

Slotted hole 24 can be arranged in such a way that when triggering device 10 is in a holding position, bolt 24a rests against a lower end stop of slotted hole 24, so that triggering triggering element 10 leads directly to force transmission to engagement lever 21. When the triggering element 2 is reset, the triggering rod 3 can at least partially pass through the elongated hole 24 be moved independently to the engagement lever 21. The possibility of movement of the bolt 24a in the elongated hole 24 can be adjusted by means of a spring element 25 assigned to the triggering device 10 and an associated adjusting screw 26 .

Figure 7a -c show different views of a further preferred embodiment of the safety catch 20 according to the invention.

The safety gear 20 is fastened horizontally to an elevator car (not shown), either directly or with appropriate fastening means or a carrier unit 80. The safety gear 20 comprises a deflection unit 40, which is designed in such a way that it causes an axial movement L of the release bar 3 into a rotation R1 of a connecting rod 22 of the safety gear 20 (cf. 7b,7c ). In this case, the connecting rod 22 is designed to connect at least two braking devices 30 to a single triggering device 10 .

The deflection unit 40 can have an L-shaped bearing element 41, which extends in the direction of the release rod 3 and orthogonally thereto and has at least one bearing point 42 for the rotational mounting of the connecting rod 22, such that the connecting rod 22 extends orthogonally to the longitudinal extension of the release rod 3 extends. The deflection unit 40 also preferably has a lever element 43 which is rigidly connected to the connecting rod 22 and which converts an axial movement of the release rod 3 into a rotary movement of the connecting rod 22 . In this case, the lever element 43 is articulated to the release rod 3 .

The connecting rod 22 can be a square profile, for example, with which a respective engagement lever 21 of a braking device 30 can be directly connected at one end. Through the deflection unit 40 can preferably at least two braking devices or braking units 30 are connected to a single tripping unit 10 .

The embodiment of Fig. 7ac allows a particularly space-saving arrangement or implementation of the safety device 20. The safety device 20 can be arranged, preferably centrally, on the top and/or bottom of the elevator car, which is not shown. The deflection unit 40 results in a very space-saving arrangement of the safety gear 20 in the plane of a base area of the elevator car, for example parallel to the car floor, so that it can be implemented with an extremely small overhang over the base area of the elevator car even in very narrow elevator shafts or in narrow ones Elevator shafts can be realized without the base area of the elevator car being significantly reduced or further limited by the safety gear for a given geometry of the elevator shaft.

Figure 8a -c show different views of a preferred embodiment of the double-acting safety device 20 according to the invention. This differs from the previously described embodiments in that it is designed to brake a connected elevator car 70 in a first and a second direction of movement B1, B2 opposite thereto.

For this purpose, the safety gear 20 comprises a triggering device 10, preferably as described above, which has a guide cage 18 arranged on the triggering rod 3 with a running surface 18a facing the triggering device 10 and a rotating element 19 mounted therein, in particular a knurled wheel, for connection to an engagement lever 21 of the associated Braking device 30 has. A guide rail 50 of the elevator or the elevator car is arranged between the guide cage 18 and a housing 60 of the triggering device 10 . In other words, the housing 60 of the triggering device 10 and the guide cage 18 enclose the Guide rail 50 sandwiched. A sliding element 61 or counter-pressure element can be arranged on the housing 60 of the triggering device 10 on an end section 1a.

The guide cage 18 is preferably arranged in a fixed position on the release rod 3 . When the triggering device 10 is triggered, the guide cage 18 is now moved in the direction of movement F3 toward the housing 60 of the triggering device 10, as a result of which the rotating element 19 presses against the guide rail 50 of the elevator and rolls along it. This results in the rotating element 18 running up or down on the running surface 18a depending on the relative movement between the guide rail 50 and the rotating element and thus essentially orthogonally to the axial direction of movement F3 of the release rod 3 . The running surface 18a can preferably be designed in such a way that it tapers upwards and downwards relative to the adjacent guide rail 50, as a result of which an increased contact pressure of the rotating element 19 on the guide rail 50 can be achieved.

The movement of the rotary element 19 triggered in this way perpendicular to the longitudinal extension of the triggering device 10 is transmitted to a brake unit 30 connected to it by means of an engagement lever 21 attached to the rotary element 19, whereby the pivotable brake shoe 31 connected thereto can be swiveled from top to bottom or from below, depending on the direction of movement of the rotary element 19 is pressed upwards by a joint 46 against the guide rail 50, as a result of which a corresponding braking effect is achieved against the respectively applied cabin movement.

9 shows a further preferred embodiment of the double-acting safety device 20 according to the invention. This is analogous to the embodiment according to FIG Fig. 8a-c designed and differs essentially only by the design of the running surface 18a of the guide cage 18.

This has a central section 44 in which the rotating element 19 is mounted in the holding position of the triggering device 10 . The section 44 can be slightly concave in this case. Above and below section 44, the running surface has two essentially concave recesses 45a, 45b, into which the rotating element 19 is brought or runs when it comes into contact with the guide rail 50 and a force is essentially orthogonal to the axial movement of the release rod 3 on the engagement lever 21 and thus on the brake shoe 31 exerts.

The embodiment described above is merely exemplary, the invention being in no way limited to the embodiments shown in the figures.

Reference List

1

carrier frame

2

release element

3

trip bar

4a,4b

spring means

5a,5b

bobbin

5c,5d

electromagnet

6a,6b

electromagnet

7a,7b

guide rails

8a

connection bar

8b

rear frame bar

9

fuse element

9a,b

first second area

9c

fuse element

10

release device

11

groove

12a,b

recesses

13a,b

protrusions

14a,b

stop elements

15

clamping slide

16

permanent magnets

17

position detection means

18

guide cage

18a

tread

19

rotation element

20

safety gear

21

engaging lever

21a,b

terminal sections

21c

joint

22

connecting rod

23

drilling

24

slotted hole

25

spring element

26

adjustment screw

30

braking device

31

brake shoes

32

brake pad

33

spring pack

40

deflection unit

41

bearing element

42

storage point

43

lever element

44

central tread section

45a,b

recesses tread

50

guide rail elevator

60

Housing release device

70

elevator car

80

carrier unit

L1,L2

directions of extension

B1,B2

direction of movement

R,R1

rotation

Claims (15)

Release device (10) for a safety gear (20) of an elevator system, comprising a support frame (1), a release element (2) arranged to be axially movable in the support frame and having a release rod (3) arranged at the end and extending through an end section (1a) of the support frame (1). for connection to an engagement lever (21) of the safety gear (20), spring means (4a, 4b) for applying a prestressing force to the triggering element (2) at least in a first holding position (H), and magnetically acting holding means (5a, 5b, 6a, 6b), which are designed to hold the triggering element (2) in the holding position (H) against the applied prestressing force, preferably with a power supply, characterized in that the triggering element (2) is designed as a preferably frame-like carriage element, which has two parts in the axial direction of movement extending guide rails (7a, 7b) for guiding the carriage element (2) in the carrier frame (1) and a connecting rail (8a) arranged perpendicularly to the guide rails and connecting them for mounting the release rod (3). Release device according to Claim 1, characterized in that the guide strips (7a, 7b) extend from the connecting strip (8a) in a direction (L1) opposite to a direction (L2) of extension of the release rod (3). Triggering device according to Claim 1 or 2, characterized in that the connecting strip (8a) has an integrated bearing element (9), in which an end section (3a) of the triggering rod (3) is preferably at least partially rotatable, radially displaceable and/or tiltable . Release device according to one of the preceding claims, characterized in that the slide element (2) has a rear frame strip (8b) arranged parallel to the connecting strip (8a) on a side facing away from the release rod (3), and that the slide element (2) as a plugged Frame element is formed, in which the individual frame strips (7a, 7b, 8a, 8b) are plugged into one another by means of projections, recesses and/or recesses provided. Triggering device according to one of the preceding claims, characterized in that the spring means of the triggering device comprise two compression springs (4a, 4b) which extend laterally of the frame-like carriage element and which are preferably located between an end section (1a) of the carrier frame which faces the triggering rod (3) and one of the Release rod (3) facing away from the end portion (2b) of the carriage element (2) extend. Release device according to Claim 5, characterized in that the guide strips (7a, 7b) and/or a rear frame strip (8b) have laterally projecting stop elements (14a, 14b) for the spring means (4a, 4b). Triggering device according to one of the preceding claims, characterized in that the magnetically acting holding means preferably comprises two electromagnets (6a, 6b) arranged between the triggering element (2) and an end section of the support frame (1a) through which the triggering rod (3) extends. comprise, which apply a holding force to the carriage element (2) and in particular the connecting strip (8a) of the carriage element (2) when power is supplied. Triggering device according to Claim 7, characterized in that the triggering device (10) has a trigger element which is independent of the triggering element (2) comprises an axially movable clamping carriage (15), with an end section (15a) in which the magnetically acting holding means (6a, 6b) are arranged, and with the clamping carriage (15) being designed to engage the triggering element (2) in cooperation with to return the magnetically acting holding means (6a, 6b) from a released position (A) to the holding position (H). Triggering device according to one of Claims 1 to 6, characterized in that the magnetically acting holding means preferably have two coil formers (5a, 5b) arranged in a fixed position and opposite one another in the carrier frame (1) for cooperation with a permanent magnet (16) arranged on the triggering element (2) between them. which are arranged and designed in such a way that the coil bodies (5a, 5b), when current is supplied, cause the triggering element (2) to move axially in the direction counter to the prestressing force of the spring means (4a, 4b) and hold the triggering element (2) in a holding position (H) enable. Triggering device according to one of the preceding claims, characterized in that the triggering device (10) has position detection means (17) which enable continuous position detection of the axially movable triggering element (2) and/or an axially movable clamping slide (15) in the support frame (1). Safety device (20) comprising a braking device (30) guided in and/or on a guide rail (50) of an elevator car and a preferably partially rotatable engaging lever (21) connected thereto for selectively triggering the braking device (30), as well as one with the engaging lever ( 21) associated trip device (10) according to any one of claims 1 to 10. Safety gear according to Claim 11, characterized in that the safety gear comprises a deflection unit (40) which is designed to convert an axial movement (L) of the release rod (3) into a rotation (R) of a connecting rod (22) of the safety gear (20). , wherein the connecting rod (22) for connecting at least two braking devices (30) to the triggering device (10) is formed. Catching device according to Claim 11, characterized in that the triggering device (10) has a guide cage (18) arranged on the triggering rod (3) with a running surface (18a) facing the triggering device (10) and a rotating element (19) mounted therein, in particular a knurled wheel , for connection to an engaging lever (21) of the braking device (30), wherein the rotating element (19) and the guide cage (18) are arranged and designed in such a way that between the running surface (18a) and an end section (1a) of the support frame (1) a guide rail (50) of the elevator can be arranged on the triggering device (10). Catching device according to Claim 13, characterized in that the rotating element (19) and the guide cage (18) are arranged and designed in such a way that the rotating element (19) presses against a guide rail (50) of the elevator when the triggering device (10) is triggered and on this in a direction essentially orthogonal to a direction of extension (L) of the release rod (3) and/or that the rotation element (19) jams between the running surface (18a) and the guide rail (50). Safety device according to claim 13 or 14, characterized in that the safety device (20) for braking a connected elevator car in a first and one of these opposite second direction of movement (B1, B2) is formed.

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