Patent Application
20230286779
The present application claims the benefit of European Patent Application No. 22158353.7, filed on Feb. 23, 2022, which is incorporated by reference herein in its entirety.
The present technology relates to a triggering mechanism for a gripping device for an elevator system.
There are gripping devices for elevators which prevent, in particular, an uncontrolled downward or upward acceleration of an elevator car if the suspension means malfunctions. The gripping device normally has a brake, for example, in the form of a so-called gripping clamp with brake shoes on either side of an elevator car guide rail that clamp onto the guide rails when the gripping device is triggered. A speed regulator for the gripping device monitors the upward and/or downward speed of the elevator car and triggers the gripping device when a predefined tolerance value is exceeded. The speed regulator is normally independent of the other components of the elevator system, and functions mechanically, thus ensuring that it continues to function correctly even if there is a power failure. The speed regulator comprises a steel cable sling encircling rollers at the upper and lower ends of the elevator shaft, one of which has a centrifugal force monitoring unit, which stops the cable when the rotation of the roller is too fast, and triggers the gripping device via an activation lever connected to the sling.
Newer technologies involve electronic speed monitoring, e.g. the Safebox introduced by ELGO in 2015, which has a reliable position sensor Limax33RED, or more advanced compact sensors such as the products in the LimaxCP series. The reliable electronic signal that is generated to trigger a gripping device must be converted to a reliable mechanical movement by the appropriate devices. Gripping devices from Wittur ESG or Dynatech eASG, for example, contain electromagnets that hold the clamps open against a spring force, such that when the power to the electromagnets is interrupted, the gripping device is triggered.
These commercially available solutions have the disadvantage that they cannot be used with conventional gripping devices, and thus require a complete reconstruction of the gripping device. Replacing the entire gripping device in existing elevator systems is complicated and expensive.
There are also triggering devices for conventional gripping devices with which the gripping device can be triggered in the event of an emergency without a mechanical speed regulator and cable sling. The triggering mechanism needed for this is operated magnetically, and when triggered, enables the necessary tractive force of 300 N, for example, and a lifting movement of up to 100 mm that is needed to trigger a conventional gripping device.
CN 111 731 964 A discloses a triggering mechanism of this type for a gripping device in an elevator system for replacing a conventional speed regulator, comprising a retaining frame, a triggering element that can move axially in the retaining frame, which has a triggering rod on one end that extends through an end of the retaining frame, which is connected to the gripping device, and compression spring that is coaxial to the triggering rod, which functions as a return element and holds the triggering element in a first standby position. The triggering element is held in place against the spring force exerted thereon by the interaction of a first magnetic connecting element on the triggering element in the form of a metal strip and a second connecting element on a clamping slide in the device in the form of a magnet that can be activated, which is deactivated by a control signal from the triggering element, such that an axial lifting movement of the triggering rod caused by the compression spring triggers the gripping device. There is lifting unit that can move independently of the triggering element with which the triggering element is returned to the standby position from the second, triggered position, which enables an axial movement of the clamping slide and the second connecting element attached to the end thereof in relation to the triggering element within the retaining frame, such that when the first and second connecting elements interact, the triggering element can be returned from the triggered position to the standby position.
WO 2020/134225 A1 discloses another triggering mechanism for a gripping device that comprises a magnetically conductive frame surrounding a magnetic hollow chamber containing a permanent magnet that can move axially therein, which has a retaining rod extending axially from the hollow chamber that can be connected to a triggering rod on the gripping device. The magnetically conductive frame has a coil, first and second sides of which are adjacent to opposite ends of the magnet. When the coil is supplied with electricity, the magnet, and therefore the triggering rod attached thereto, are moved axially into a first standby position counter to the force of an external spring located between the triggering mechanism and the gripping device, thus opening the gripping device. If an abnormal state of the elevator car is detected, the supply of electricity to the coil is interrupted, resulting in the magnet located in the magnetic chamber moving to a triggering position for the gripping device as a result of the spring force.
Typical known solutions are structurally complex and/or require a great deal of maintenance. Based on the known prior art, the presently described technology relates to an improved triggering mechanism for a gripping device that addresses the disadvantages in the prior art and at least partially resolves them. In particular, a triggering mechanism is to be created that has a simple structural design and also effectively and reliably triggers a conventional gripping device without the necessity of incorporating a conventional mechanical speed regulator. The technology also addresses or resolves other problems that are discussed in the following description.
The present disclosure relates to a triggering mechanism for a gripping device in an elevator system, in particular as a replacement for a conventional speed regulator, which comprises a supporting frame, an triggering element that can move axially inside the supporting frame, which has a triggering rod on one end that extends through an end of the supporting frame, which can be connected to the gripping device, a spring that applies a spring force to the triggering element when it is in at least one first standby position, and a magnetic retaining means that is designed to hold the triggering element in the standby position counter to the tension of the spring when supplied with electricity, in which the triggering element preferably forms a frame-like slide element, which has two guide strips extending in the axial direction of movement for guiding the slide element in the supporting frame, and one connecting strip that connects the guide strips at a right angle thereto on which the triggering rod is supported.
The assembly according to the present disclosure results in a structurally simple design for a device that is much more reliable than that in the prior art. The two lateral guide strips enable a longitudinal guidance of the triggering element within the supporting frame that prevents a tilting and/or canting thereof in the supporting frame. According to embodiments of the present disclosure, the frame-like structure results in a stable and balanced design, which minimizes undesired inertial effects during the triggering process in particular.
According to embodiments of the present disclosure, the guide strips preferably extend from the connecting strip in the direction opposite that in which the triggering rod extends. In other words, the guide strips preferably extend from a side of the connecting strip facing away from the triggering rod. The length of the guide strips in the direction of movement for the slide element is at least twice, preferably three times, and more preferably four times the width, or length, of the connecting strip. The length of the guide strips is preferably 1 to 20 cm, more preferably 2 to 15 cm.
According to embodiments of the present disclosure, the guide strips are advantageously supported in two opposite sides of the supporting frame. The guide strips can be supported by means of a tongue and groove connection in the supporting frame, such that they can move axially therein. By way of example, the guide strips can have ribs or tongues formed as integral parts thereon, which fit into corresponding longitudinal grooves in the supporting frame.
According to embodiments of the present disclosure, the magnetic retaining means are designed to retain the triggering element in the standby position counter to the spring tension when supplied with electricity. The standby position is understood to be the position in which the triggering element is not activated, i.e. in which the triggering mechanism does not trigger, or close, the gripping device connected thereto, such that the elevator can be operated. The retaining means are also designed to release the triggering element when the power supply thereto is interrupted, such that they then move from the standby position to the triggered position by the spring tension. This results in an axial lifting movement of the triggering rod, by means of which an activation lever for a brake device or brake unit in the gripping device connected thereto can be brought from an open position to a closed position or braking position. The brake device can clamp onto and/or engage with a guide rail in the known manner when triggered by the activation lever, such that the brake shoes in the brake device bear on, or clamp onto the guide rails.
According to embodiments of the present disclosure, when in the triggered state, the triggering element can then be returned from a triggered position to a standby position by the magnetic retaining means, such that the gripping device is opened, or the brake device in the gripping device can be released from a closed position. In an example embodiment, the triggering mechanism is preferably designed such that when the triggering element is returned form the triggered position to the standby position, it can still move toward the triggered position. Accordingly, the triggering element is not prevented from moving from the standby position to the triggered position, and/or from an intermediate position between the standby position and the triggered position to the triggered position even when returning the triggering element to the standby position if it is triggered again. Force applied to the triggering element to move or return it from the triggered position to the standby position still allows for axial freedom of movement of the triggering element between the standby position and the triggered position.
According to embodiments of the present disclosure, the triggering mechanism preferably has a control unit dedicated to the retaining means for activating the triggering mechanism and specifically the retaining means, or it is designed such that it can be connected to such a control unit for this.
According to embodiments of the present disclosure, the connecting strip is preferably designed to secure the triggering rod axially to the frame-like slide element. In such embodiments, the triggering rod is placed or supported on the connecting strip such that the triggering rod cannot move axially in relation to the slide element. Alternatively, the triggering rod can be supported in the connecting strip such that it can move axially to a limited extent.
According to embodiments of the present disclosure, the connecting strip preferably has an integrated bearing element in which an end section of the triggering rod is preferably supported such that it rotates and/or tilts to some extent. The triggering element can also be supported in the bearing element such that it can move radially to a limited extent. Unlike in typical solutions, in which the triggering rod is screwed into a corresponding counterpart, and thus cannot move, the design according to the present disclosure results in a significantly optimized support for the triggering rod with a predefined amount of play or freedom of movement. This results in a significantly more robust system, in particular with regard to its resilience when the triggering rod is subjected to radial and/or rotational forces, thus minimizing the maintenance requirements for the mechanism.
According to embodiments of the present disclosure, the bearing element is preferably formed by a hole and/or projection in the connecting strip, which engages with a preferably circumferential groove in the outer surface of the end section of the triggering rod. In an example embodiment, the bearing element can have a hole with a variable inner diameter, in which a first part of the hole has a larger inner diameter for receiving and/or at least partially inserting the triggering rod, and a second part of the hole can have a smaller inner diameter in which the triggering rod is axially secured in place.
According to embodiments of the present disclosure, the triggering rod is also preferably inserted through a hole or a preferably round bore in the end section of the supporting frame. This hole can form an axial support and/or a enable a predefined radial freedom of movement for the triggering rod in the end section of the supporting frame.
According to embodiments of the present disclosure, the slide element also has frame strip at the rear that is parallel to the connecting strip on a side facing away from the triggering rod. The frame strip is orthogonal to the guide strips when looking down onto the slide element.
According to embodiments of the present disclosure, the slide element is preferably a frame element that is snapped together. In such embodiments, the slide frame is not assembled with screws and/or adhesive. This results in a very resilient design of the frame element, which can further reduce the maintenance requirements. The individual frame parts are snapped together in this case, with projections, recesses and/or holes. By way of example, the guide strips in the slide element can each have opposing holes into which projections on the connecting strip and the rear frame strip engage.
According to embodiments of the present disclosure, the spring elements in the triggering mechanism preferably comprise two compression springs on the sides of the frame-like slide element. Unlike in the prior art, in which there is a central spring that is coaxial to the triggering rod, this results in a more robust triggering element, that moves more reliably. Furthermore, relatively long springs can be used as a result of the lateral placement, thus increasing the reliability and reducing the risk of breaking a spring. Moreover, the use of compression springs ensures a reliable functioning of the triggering mechanism, even if one of the springs breaks. The compression springs are placed such that they extend between an end section of the supporting frame facing the gripping device and an end section of the slide element facing away from the gripping device.
According to embodiments of the present disclosure, the guide strips and/or the rear frame strip can have stop elements for the spring elements that protrude laterally. In an example embodiment, projections on the rear frame strip that engage in holes in the guide strips form the lateral stop elements.
According to embodiments of the present disclosure, the magnetic retaining means preferably comprise two electromagnets placed between the triggering element and a side of the supporting frame facing the gripping device, which exert a retaining force on the connecting strip in the triggering element when supplied with electricity. In such embodiments, the triggering mechanism preferably comprises clamping slide that can move axially, independently of the triggering element, with the electromagnets located in the first end section thereof, which is designed to return the triggering element from a triggered position to the standby position. The clamping slide is preferably supported on both sides in the supporting frame by guide strips or the like, such that it can move.
In another example embodiment, the magnetic retaining means preferably comprise two coils fixed opposite one another in the supporting frame, which interact with a permanent magnet on the triggering element lying therebetween. The coils and the permanent magnet are designed and placed such that the coils enable an axial movement of the permanent magnet, and therefore the triggering element, in the direction opposite the spring force, when supplied with electricity, as well as retaining the triggering element in the standby position. The permanent magnet is preferably attached to the triggering element by fastening means intended for this, such that it remains stationary thereon. The orientation of the poles of the permanent magnet is preferably at a right angle to the winding direction of the coils. As soon as the power supply to the coils is interrupted, in particular if an abnormal operating state of the elevator car is detected, the retaining force applied to the triggering element by the coils is terminated, and the triggering element moves into the triggered position. It is returned to the standby position when power is returned to the coils.
According to embodiments of the present disclosure, the triggering mechanism comprises position detection sensors with which the axial position of the moving triggering element and/or a moving clamping slide in the supporting frame can be detected on a continuous basis. As a result, the current or actual positions of the moving components in the triggering mechanism can be detected, such that the individual components, and in particular the retaining means, can be controlled in an optimized manner. In an alternative embodiment, the position detection sensors preferably comprises numerous Hall sensors placed along the direction in which the moving components move, e.g. in or on a dedicated cover or housing element for the triggering mechanism, which interact with magnetic position markers placed on the moving components.
Another aspect of the technology relates to a gripping device comprising a brake device in or on a guide rail for an elevator car, and an activation lever connected thereto, which can preferably rotate at least in part, for triggering the brake device, and a triggering mechanism connected to the activation lever, such as that described above.
The gripping device can be attached to an elevator car in the known manner. The triggering mechanism is preferably substantially parallel to the longitudinal extension of the guide rails for the elevator car with respect to the alignment of the direction of movement for the triggering rod. The activation lever can preferably be at a right angle to the direction of movement for the triggering rod, and it can be supported in an articulated manner at a first end section on the elevator car, and connected at a second end section, opposite thereof, to the brake device or brake unit. The triggering rod is therefore connected at an intermediate point between the joint and the brake device such that an axial movement of the triggering rod results in a rotation of the activation lever about the joint.
At the connecting point between the triggering rod and the activation lever, the triggering rod have an oblong hole extending in the direction of movement, in which a bolt or locking pin for the activation lever is supported such that it can move at least to some extent. The oblong hole can advantageously be designed and located such that when the triggering mechanism is in a standby position, the bolt bears on an end stop in the oblong hole, such that a triggering of the triggering element results in a direct transfer of force to the activation lever. When the triggering element is returned, the triggering rod can be moved through the oblong hole, at least partially independently of the activation lever, resulting in an optimized release of the gripping device.
According to embodiments of the present disclosure, the gripping device comprises a deflector unit designed to convert an axial movement of the triggering rod into a rotation of a connecting rod in the gripping device, in which the connecting rod is also advantageously designed to connect at least two brake devices to the triggering device. The connecting rod can have a square profile for this, to which a respective activation lever for a brake device can be connected at one end directly. In such embodiments, the activation lever is preferably not also connected at a joint to the elevator car or a retaining structure thereon, and instead, a rotation of the connecting rod is transferred directly and preferably without transformation to the activation lever. At least two brake devices or brake units can preferably be connected by the deflector unit to a triggering mechanism.
According to embodiments of the present disclosure, the gripping device therefore preferably comprises at least two brake devices or brake units according to the presently disclosed technology, each of which has a dedicated activation lever connected to a single, shared triggering mechanism. This significantly reduces the risk of a canting of the elevator car in the guide system or elevator shaft when the gripping device is triggered, in particular because, unlike in the prior art, there is no need for two separate triggering mechanisms on the car, with which there is a higher chance that they will not trigger simultaneously, such that the car might be tilted.
According to embodiments of the present disclosure, the deflector unit is also preferably designed such that the triggering mechanism can be mounted substantially horizontally on the elevator car. In such embodiments, the triggering mechanism is placed on the elevator car such that the axial direction of movement of the triggering element is substantially horizontal. This minimizes the effects of external acceleration forces, in particular in an abnormal system state, which could counteract a triggering of the mechanism. As a result, the necessary retaining and triggering forces for the triggering mechanism can be somewhat weaker or lower, resulting in a less expensive and more energy-efficient construction.
In example embodiments, the gripping device is also designed to decelerate the elevator car in a first and second direction of movement or acceleration.
According to embodiments of the present disclosure, the triggering mechanism comprises a guide cage on the triggering rod that has a bearing surface facing the triggering mechanism, the housing, or the supporting frame for the mechanism, and a rotating element supported therein, in particular a knurled wheel, which can be connected to an activation lever for the brake device. In an example embodiment, the rotating element and the guide cage are preferably placed and designed such that a guide rail for the elevator can be placed or guided between the bearing surface and an end section of the supporting frame for the triggering mechanism. In another example embodiment, the rotating element and guide cage are placed and designed such that the rotating element presses against a guide rail for the elevator car when the triggering mechanism is triggered, and rolls against it in a direction substantially orthogonal to a direction of extension or movement for the triggering rod, and/or such that the rotating element is clamped between the bearing surface and the guide rail.
According to embodiments of the present disclosure, the guide cage at least partially enables a movement of the rotating element in a direction orthogonal to the direction of movement for the triggering rod within predefined limits. In such embodiment, the guide cage can have an upper and lower stop, or a movement limiter, which limits the movement of the rotating element orthogonally to the axial direction of movement for the triggering rod within a predefined range. By way of example, the guide cage can have a substantially concave bearing surface, which is tilted or tapered toward the guide rail on both sides, or above and below, from a neutral position of the rotating element.
The design according to the present disclosure makes it possible to create a triggering mechanism that can be triggered when the elevator car is moving in either direction, i.e. when the elevator car is inadvertently accelerated upward or downward. Instead of at least two triggering mechanisms, one for each of the possible inadvertent directions of acceleration for the elevator car, only one triggering mechanism is needed, which functions in both directions.
In such embodiment, the rotating element, or knurled wheel is preferably connected directly to the activation lever for the brake device, in particular at an axis of rotation for the rotating element.
In another example embodiment, the triggering mechanism can preferably be placed horizontally on the elevator car in relation to the axial direction of movement for the triggering rod. The direction of movement for the triggering rod in the triggering mechanism is or can be substantially orthogonal to the guide rails for the elevator car.
According to embodiments of the present disclosure another aspect of the present technology relates to an elevator system that has an elevator car in an elevator shaft and a triggering mechanism and/or gripping device such as those described above. The elevator system comprises substantially vertical guide rails for the elevator car with which a brake device in the gripping device comes in contact. The elevator system also comprises a control unit designed to activate the triggering mechanism when the elevator system is in an abnormal operating state.
Particulars, further effects, and details of the present disclosure shall be explained in greater detail below in reference to the schematic, merely exemplary drawings. Therein:
If the triggering mechanism is triggered, the triggering rod 3 moves in the axial direction F1, which results in a rotational movement R of the activation lever 21 about the joint 21c through the connection of the triggering rod 3 to the activation lever 21 at a point lying between the first and second ends 21a, 21b. A lifting h of the triggering rod is preferably up to 50 mm, particularly advantageously between 10 mm and 20 mm.
As indicated by the broken line in
The triggering mechanism 10 comprises a supporting frame 1 that has a first end section 1a and an opposing second end section 1b. A slide element forming the triggering element 2 is supported in the supporting frame 1 such that it can move axially, and the triggering rod 3 on the end of the triggering element 2 extends through the end section 1a of the supporting frame 1. This end section 1a has a hole 1c for this that serves as an axial support for the triggering rod 3.
The slide element 2 can move in this case at least between a standby position H (
In the standby position H, the slide element 2 is held in place by retaining means 6a, 6b located between the end section 1a of the supporting frame 1 and the slide element 2. In this embodiment, the retaining means 6a, 6b are formed by electromagnets which act magnetically on the slide element 2 when supplied with electricity, counter to the spring forces of the springs 4a, 4b. When in the standby position H, this magnetic force is greater that the spring force of the springs 4a, 4b.
As soon as a control unit (not shown) that is connected to or integrated in the triggering mechanism receives a triggering signal, the power supply to the retaining means 6a, 6b is interrupted, resulting in the slide element 2 moving from the standby position H shown in
To return the slide element 2, the triggering mechanism 10 in this exemplary embodiment comprises a clamping slide 15 that can move axially independently of the triggering element 2. This has a first end section 15a in which the magnetic retaining means 6a, 6b are located. The end section 15a also has a cut-out or hole 24 through which the triggering rod 3 can be inserted, without coming in contact therewith. The other end section 15b is preferably connected to a drive, e.g. a spindle motor 15c. The clamping slide 15 is such that it can move axially in the supporting frame 1, parallel to the slide element 2, and is designed to return the triggering element 2 from a triggered position A, shown in
The clamping slide 15 is moved with the drive 15c by a dedicated control unit from the initial end position in the supporting frame, shown in
The retaining means 6a, 6b are then supplied with electricity, such that a magnetic force acts on the triggering means. The clamping slide 15 is then returned by the drive 15c to the initial end position in the supporting frame 1, during which the magnetic force draws the triggering element 2 into its standby position, as shown in
During the return process described above, the clamping slide 15 always moves along a side of the triggering element 2 facing the triggering rod 3, such that a rearward area is not blocked or hidden by the clamping slide. As a result, even when resetting the triggering element, it can always be ensured that the triggering mechanism will function correctly.
The triggering mechanism 10 can also contain position detection sensors 17 with which the axial positions of the triggering element 2 and/or the clamping slide 15 in the supporting frame 1 can be continuously monitored. The position detection sensors can comprise numerous sensors 17a, preferably in a series, in or on the supporting frame 1 or housing 60, e.g. Hall sensors, as shown by way of example in
The position shown in
In another example embodiment, the slide element 2 is preferably a frame element that snaps together, in which the individual strips 7a, 7b, 8a, 8b are snapped together with projections, recesses, and/or holes. The guide strips 7a, 7b on the slide element 2 can have opposing recesses 12a, 12b, for example, into which projections 13a, 13b on the connecting strips 8a and the rear frame strip 8b engage.
In an example embodiment, the connecting strip 8a comprises an integrated bearing element 9 in which an end section 3a of the triggering rod 3 is preferably supported such that it can rotate, move radially, and/or tilt, at least to some extent. The bearing element 9 can be a hole in the connecting strip 8a, which engages in a preferably circumferential groove 11 on the outer surface of the end section 3a of the triggering rod 3. The bearing element 9 can also be a hole with a variable inner diameter, in which a first part 9a of the hole has an inner diameter through which the triggering rod 3 can be inserted, and a second part 9 of the hole has a smaller inner diameter, in which the triggering rod 3 is fixed in place axially. The triggering rod 3 can be held in place in the bearing element 9 by a corresponding securing element 9c in the smaller part 9b of the hole 9.
The guide strips 7a, 7b and/or the rear frame strip 8b can have stop elements 14a, 14b that extend laterally, against which the springs 4a, 4b bear.
The bearing element 9 in this embodiment can comprise a hole into which an end section 3a of the triggering rod 3 can be inserted. The securing element 9c can be a two-piece cover strip, which can be fastened to the connecting strip 8a at different positions, such that two semicircular cut-outs engage in a groove 11 on the outer surface of the end section 3a of the triggering rod 3 from opposite sides.
The oblong hole 24 can be placed such that the bolt bears on a lower end stop in the oblong hole 24 when the triggering mechanism 10 is in the standby position, such that when the triggering mechanism 10 is triggered, force is exerted directly on the activation lever 21. When resetting the triggering element 2, the triggering rod 3 can be moved through the oblong hole 24, at least partially independently of the activation lever 21. The extent of the possible movement of the bolt 24a in the oblong hole 24 can be set by of a spring element 25 dedicated to the triggering mechanism 10 and an associated setscrew 26.
The gripping device 20 is attached horizontally to an elevator car (not shown), either directly or with corresponding fastening means, or a mount 80. The gripping device 20 comprises a deflector unit 40 designed to convert an axial movement L of the triggering rod 3 into a rotation R1 of a connecting rod 22 in the gripping device 20 (cf.
The deflector unit 40 can contain an L-shaped bearing element 41 that extends toward the triggering rod 3 and orthogonally thereto, and has at least one bearing point 42 in which the connecting rod 22 is rotationally supported such that the connecting rod 22 extends orthogonally to the longitudinal extension of the triggering rod 3. The deflector unit 40 also preferably has a lever element 43, rigidly connected to the connecting rod 22, which converts an axial movement of the triggering rod 3 into a rotational movement of the connecting rod 22. The lever element 43 is connected in an articulated manner to the triggering rod 3.
The connecting rod 22 can have a square profile to which a respective activation lever 21 for a brake device 30 can be connected directly at one end. The deflection unit 40 makes it possible to connect preferably at least two brake devices or brake units 30 to a single triggering mechanism 10.
The example embodiment as shown in
The gripping device 20 comprises a triggering device 10, preferably such as that described above, which has a guide cage 18 with a bearing surface 18a facing the triggering mechanism 10, and a rotating element 19 supported therein, in particular a knurled wheel, which can be connected to an activation lever 21 for the associated brake device 30. A guide rail 50 for the elevator or elevator car is located between the guide cage 18 and a housing 60 for the triggering mechanism 10. In other words, the guide rail 50 is sandwiched between the housing 60 for the triggering mechanism 10 and the guide cage 18. A sliding component 61 or counterpressure element can be placed on the housing 60 for the triggering mechanism 10 at an end section 1a thereof.
In such example embodiment, the guide cage 18 is preferably secured in place on the triggering rod 3. When the triggering mechanism 10 is triggered, the guide cage 18 is moved toward the housing 60 in the direction of movement F3, such that the rotating element 19 is pressed against the guide rail 50 for the elevator and rolls over it. This results in the rotating element 18 rolls up or down on the bearing surface 18a, depending on the relative movement between the guide rail 50 and the rotating element, and thus in a direction substantially orthogonal to the axial direction of movement F3 of the triggering rod 3. The bearing surface 18a can be designed such that it tapers upward and downward in relation to the guide rail 50 it bears on, such that an increased pressure can be exerted by the rotating element 19 onto the guide rail 50.
The movement of the rotating element 19 at a right angle to the longitudinal extension of the triggering mechanism 10 triggered in this manner is transferred to a brake unit 30 connected thereto by an activation lever 21 attached to the rotating element 19, resulting in the swivel-mounted brake shoe 31 connected thereto being pressed downward from above or upward from below about a joint, depending on the direction of movement of the rotating element 19, against the guide rail 50, such that the movement of the elevator car is braked.
This example embodiment has a middle section 44 in which the rotating element 19 is supported when the triggering mechanism 10 is in the standby position. The middle section 44 can be slightly concave. Above and below the middle section 44, the bearing surface has two substantially concave recesses 45a, 45b, into which the rotating element 19 moves when it comes in contact with the guide rail 50, such that it exerts a force, substantially orthogonal to the axial movement of the triggering rod 3, on the activation lever 21 and thus on the brake shoe 31.
The embodiments described above are merely exemplary, and the present disclosure is not limited in any way to the embodiments shown in the drawings.
| Number | Date | Country | Kind |
|---|---|---|---|
| 22 158 353.7 | Feb 2022 | EP | regional |
