EP2840053A1 - Dispositif de surveillance pour une cabine d'ascenseur - Google Patents

Dispositif de surveillance pour une cabine d'ascenseur Download PDF

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Publication number
EP2840053A1
EP2840053A1 EP13180946.9A EP13180946A EP2840053A1 EP 2840053 A1 EP2840053 A1 EP 2840053A1 EP 13180946 A EP13180946 A EP 13180946A EP 2840053 A1 EP2840053 A1 EP 2840053A1
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EP
European Patent Office
Prior art keywords
speed
wheel
monitoring device
rolling body
drive wheel
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.)
Withdrawn
Application number
EP13180946.9A
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German (de)
English (en)
Inventor
Hans Kocher
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Inventio AG
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Inventio AG
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Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to EP13180946.9A priority Critical patent/EP2840053A1/fr
Publication of EP2840053A1 publication Critical patent/EP2840053A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/044—Mechanical overspeed governors

Definitions

  • the invention relates to a monitoring device for an elevator car, an elevator installation with a monitoring device and a corresponding method for monitoring an elevator cage.
  • the elevator car can serve for the transport of persons and / or other loads.
  • the monitoring device for detecting an unintentional driving away of an elevator car from a standstill known.
  • the monitoring device is designed as an electromechanical monitoring device that can detect an unexpected slipping or wegtriften the elevator car and can operate a braking device via a safety device.
  • the monitoring device is switched from a normal position to a standby position. This can be done, for example, when a door is opened. Due to gravity, a cam of a Mitlaufrades this case first down. As long as the elevator is stationary, the Mitlaufrad remains with the cam in the ready position.
  • the follower wheel rotates, causing the cam to rotate upwards and actuate an electromechanical switch.
  • the electromechanical monitoring device is then in a release position, whereby the braking device is actuated.
  • the intervention of a knowledgeable person is required to reset the monitoring device.
  • a responsiveness can be set via the diameter of the follower wheel, so that, for example, a response delay corresponding to a path deviation of about 30 mm to about 100 mm for the elevator car is produced.
  • usual small movements of the elevator car can be collected at a standstill, which arise for example by stretching the suspension means during loading and unloading operations.
  • the follower wheel can also be pressed against a running diameter of a speed limiter.
  • the from the WO 2012/080103 A1 known monitoring device has the disadvantage that a large number of components and a complex structure are required if both a speed limit and a determination of unintentional driving away of an elevator car from a standstill should be detected.
  • a safety brake device is known.
  • a hub is provided which is rotationally driven about a horizontal axis.
  • the hub rotates at a speed proportional to the speed of a moving part.
  • the hub includes radial guides in which cylindrical flyweights are slidably mounted.
  • the hub comprises a circumferential housing, which constitutes a radial stop for the centrifugal weights, when the gravity effect is greater than that of the centrifugal force or vice versa.
  • the centrifugal weights dip into an oil bath, wherein the radial movement of the centrifugal weights causes lubrication for the sliding movements in the guides.
  • the speed of the hub results in a height to get to the flyweights.
  • One approach of the device is placed in the vicinity of the transition trajectory according to the limit speed at which it is desired to trigger the safety brake.
  • One of the centrifugal weights then serves as a striking element, which breaks the approach, whereby the braking device is actuated. Restore is accomplished by replacing the broken neck and building pressure with a hand pump.
  • the from the EP 0 366 526 B1 known safety brake device has the disadvantage that the structure is complex and a reset requires considerable effort. In particular, parts of the broken approach can also get into the oil bath, so that when replacing a replacement of the oil bath is required. In addition, when replacing the broken neck, replace the broken neck and add hydraulic fluid that has escaped through the broken neck. Here is also a function test. In addition, there is the disadvantage that it comes in operation due to contamination to a decrease in the lubricity of the oil and a greater frictional resistance of the centrifugal bodies. Thus, in this regard, a regular check and a timely oil change is required.
  • the object of the invention is to provide a monitoring device for an elevator car and to provide an elevator system with a monitoring device, which are designed improved. Specifically, it is an object of the invention to provide a monitoring device and an elevator installation with a monitoring device, which enable a monitoring of a speed of the elevator car in a reliable and low-maintenance manner, possibly with little effort and a path limitation is enabled at a standstill.
  • the proposed monitoring device includes a speed wheel, a rotatable indexing disk and a switching device.
  • the speed wheel is, for example, driven directly by an actuator or it is driven by a drive wheel from the actuator.
  • the elevator car is not part of the monitoring device of the invention.
  • parts of the elevator car in particular a carrier or a mounting plate, may also be components of the monitoring device. This is particularly advantageous when the monitoring device is retrofitted.
  • an actuating cable serving as the actuating means drives the driving wheel or directly the speed wheel of the monitoring device.
  • a speed limiter cable of the elevator system is suitable. This can also be the speed limiter cable of a speed limiter which is already present in the system.
  • the switching disc actuates the switching device at least indirectly.
  • the switching disk preferably actuates a switch of the switching device with a switching curve or an approach provided on the switching disk approach.
  • an indirect operation is possible, which is possible via a pin, optoelectronic or the like.
  • the speed wheel of the monitoring device is drivable in one embodiment of the drive wheel. In the coupled state, the speed wheel is then driven by the drive wheel. Thus, a possibly switchable coupling is possible.
  • the speed wheel can also be generally driven by the drive wheel or directly by the actuating means, so that there is always a connection.
  • the speed wheel can thus be driven at least indirectly, so that a direct or an indirect connection can be realized.
  • the at least indirect connection can be done by a ratio ratio of 1: 1, which can be realized by a direct connection.
  • a transmission with a suitable translation can also be provided.
  • the speed wheel on at least one rolling body receiving in which a rolling body is arranged.
  • the rolling body rolls due to an effect of centrifugal force when reaching a limit speed against the force of gravity partially out of the rolling body recording or he rolls at best because of the effect of centrifugal force in the rolling body recording.
  • the rolling body therefore rolls at least partially out of the rolling body seat due to the interaction of centrifugal force and gravity. He describes accordingly resulting from the equilibrium of centrifugal force and gravity trajectory.
  • the roller takes the selector disc with it and twists it.
  • the rolling body thus takes at least indirectly the switching disc for activating the boundary.
  • a further element or part may be provided, which acts on the indexing disk. It is also a direct interaction between the rolling body and the switching disc possible.
  • the rolling element can engage in the indexing disk, in particular in a recess of the indexing disk.
  • the speed wheel is drivable by means of a transmission of the drive wheel. Specifically, this allows the speed wheel to rotate at a greater angular velocity than the drive wheel. As a result, the sensitivity can be increased, allowing a compact design.
  • the predetermined limit speed is set. Since the rolling body advantageously at least partially rolls out of the rolling body receptacle or at most does not roll back in the rolling body receptacle when the limiting speed is reached by the elevator car, further influencing variables, in particular frictional forces, can be avoided or at least reduced. This can be dispensed with a lubrication, which prevents the susceptibility to contamination from the outset.
  • a clutch is provided between the speed wheel and the drive wheel and the speed wheel is at least indirectly driven by the drive wheel when the clutch is closed.
  • the speed monitoring is active only in certain cases, especially in special cases.
  • a conceivable application is the speed monitoring at a standstill or a slow ride the elevator car.
  • the elevator car can be used to carry loads and be driven to a certain level with the door open. Such a level may for example be determined by a loading area of a truck. If the elevator car is driven to such a level, then it is not possible to monitor a fault by means of a pure travel limit.
  • Misbehavior can occur, for example, in that a heavy item to be transported from the truck is driven by means of a lift truck into the elevator car, as a result of which the elevator car is overloaded. This leads to an acceleration of the elevator car.
  • a suitable speed limit By specifying a suitable speed limit, emergency braking can now be initiated at an early stage.
  • Such a limit speed may be, for example, a range of about 0.2 m / s to about 0.3 m / s.
  • a high level of security can be ensured even in such applications. Specifically, this makes possible a regulation in which a travel path of the elevator car to a suitable level is comparatively large, in particular greater than 50 cm.
  • the speed wheel can also always be driven at least indirectly by the drive wheel. This is suitable for applications where the speed of the elevator car during normal operation monitored and thereby limited. This may be the case, for example, if an existing elevator installation with a supplementary safety system is to be secured in the upward direction to ensure that the vehicle speed is too high. In fact, existing, old elevator systems have in part only a safety system for securing too high driving speed in the downward direction.
  • the elevator installation can also have several monitoring devices. Specifically, one monitoring device may monitor and thereby limit the speed during normal operation while another monitoring device monitors and limits the speed, for example, during an elevator car stop, when the elevator car door is open, or in special cases. A special case, for example, be driving with increased load.
  • the switching disc comprises a switching cam with a radially outwardly extending switching cam part, wherein the switching device is operable upon rotation of the switching disc by a predetermined angle of rotation of the switching cam part.
  • the actuation of the switching device can be effected by a rotational movement of the indexing disk.
  • a mechanical actuation is possible, which also allows a reset of the switching device by simply resetting the switching disc. It is even possible that a positioning of the indexing disk is ensured in its initial position via a spring element.
  • a reliable starting position is realized, which on the one hand prevents false triggering and on the other hand allows a specification of the predetermined rotation angle with improved accuracy.
  • the rolling body is formed as a ball.
  • the rolling body can also be formed in other ways, in particular as a roller.
  • an embodiment of the rolling body is possible, in which the rolling body roll into the rolling body receiving and can roll out of this. On a special lubrication, especially an oil bath or the like, can thus be dispensed with.
  • the indexing disc has at least one inwardly open to the rolling body receiving recess with a driving stop.
  • the open one Recess of the switching disk is open in a starting position in which the switching device is not actuated by the switching disc, with respect to gravity.
  • the rolling element can at least partially roll out of the rolling element receptacle, strike against the driving stop of the recess during rotation of the switching disk, and thereby take the switching disk if the speed of the elevator car exceeds the predetermined limit speed.
  • the rolling body engages directly into the recess of the indexing disk to take the indexing disk. This allows a mechanically simple and thus robust design. Furthermore, this makes it possible to realize a simple reset which, if appropriate, can also be automated, in particular in response to a reset signal.
  • the speed wheel has a plurality of rolling body receptacles, in each of which a rolling body is arranged, and the rolling body receptacles are circumferentially distributed, at least approximately uniformly on a radius of the speed wheel. Due to the number of rolling element housings and the number of rolling elements arranged therein, an adaptation, in particular with respect to the radius of the speed wheel, can be achieved in order to ensure a response of the monitoring device within a desired response time or a desired response path.
  • a coupling device which serves for coupling the indexing disk to the drive wheel and the switching device is at a rotation of the drive wheel by a predetermined angle of rotation, which causes a corresponding rotation of the drive wheel coupled to the switching disc, at least indirectly actuated by the switching disc, if the Switching disc is coupled to the drive wheel.
  • the switching disc is rotated in the coupled state with the drive wheel, so that, for example, after a predetermined angle of rotation a switching cam portion of the switching disc actuates the switching device. In this case, other operations of the switching device are conceivable.
  • the same mechanism that performs the operation of the switching device at the speed limit also be used to limit the path at a standstill of the elevator car.
  • the speed limit will be in this case preferably used during normal operation, while, for example, when the elevator door is open, the travel limit is used.
  • the monitoring device can also be adapted to the respective application by the choice of the corresponding transmission or the ratio of the transmission.
  • the monitoring device is mounted on the elevator car, wherein the drive wheel of the monitoring device so cooperates with the actuating means that the drive wheel is driven at its tread on which the actuating means bears against the drive wheel at twice the speed of the elevator car.
  • the monitoring device is arranged on the elevator car on a continuous part of the speed governor cable.
  • the speed limiter cable is connected at the elevator car to an operating lever of a catching device.
  • Fig. 1 shows an elevator system 1 with a monitoring device 2 in a partial, schematic sectional view.
  • the elevator installation 1 has an elevator shaft 3, which is accommodated in a building 4.
  • accesses 5, 6, 7 are provided in the building 4, via which a person 8 can get into an elevator car 9 of the elevator installation 1 and later get off again.
  • the elevator car 9 may have a suitable door.
  • the elevator car 9 can also serve to transport other loads.
  • embodiments of the elevator installation 1 are conceivable, which serve exclusively for transporting loads in the form of goods or things.
  • a suspension of the elevator car 9 with traction and suspension means, a prime mover, suitable brake and guide rails and the like are not shown for ease of illustration.
  • the monitoring device 2 can be designed as a retrofittable monitoring device 2.
  • the monitoring device 2 is mounted on a support 10 which is fixed to the Elevator car 9 is connected. When the elevator car 9 moves through the elevator shaft 3, the monitoring device 2 thus moves together with the elevator cage 9 through the elevator shaft 3.
  • the actuating means 11 is guided around an upper guide roller 12 and a lower guide roller 13.
  • the upper guide roller 12 is disposed in an upper portion of the elevator shaft 3 in the vicinity of a ceiling 14 of the elevator shaft 3.
  • the lower guide roller 13 is disposed in a lower portion near a bottom 15 of the elevator shaft 3.
  • the actuating means 11 is connected via a connecting element 16 with the carrier 11.
  • the actuating means 11 is divided by the guide rollers 12, 13 in a carrier-fixed part 17 and a continuous part 18.
  • the carrier-fixed part 17 is connected via the connecting element 16 with the elevator car 9 so that it always moves with the elevator car 9 through the elevator shaft 3.
  • an actuating means 11 is provided in the form of an actuating cable 11.
  • the actuating means 11 can also be configured in other ways, in particular in the form of an actuating belt.
  • the actuating means 11 may also be formed of a plurality of operation cables and / or operating belt or the like, which run parallel to each other.
  • a possibly already existing speed limiter rope can be used as actuating means 11.
  • the speed limiter cable is connected to the elevator car 9, corresponding to the connecting element 16, with a safety gear system.
  • the speed limiter cable is guided around a speed limiter corresponding to the upper guide pulley 12 and around a tension pulley corresponding to the lower pulley roller 13.
  • the speed limiter is arranged in the upper region of the elevator shaft 3 in the vicinity of the ceiling 14 of the elevator shaft 3.
  • the tensioning roller is arranged in the lower region in the vicinity of the bottom 15 of the elevator shaft 3.
  • the speed limiter cable is thus also connected to the elevator car 9 via the connecting element 16.
  • the speed governor cable is also divided into the carrier-fixed part 17 and the continuous part 18 by the speed limiter and the tensioning roller.
  • the carrier-solid part 17 is over the Connecting element 16 connected to the elevator car 9 so that it always moves with the elevator car 9 through the elevator shaft 3.
  • a speed vK of the elevator car 9 does not disappear, the elevator car 9 thus moves relative to the building 4, then a non-vanishing relative speed vS results between the passing part 18 and the elevator car 9.
  • This speed vS serves as the sensor speed vS for the Monitoring device 2.
  • the carrier-solid part 17 of the actuating means 11 may also be omitted and only the part 18 may be provided, which is then arranged stationarily between the ceiling 14 and the bottom 15.
  • the guide rollers 12, 13 can also be omitted here.
  • the sensor speed vs is then equal in magnitude to the speed vK of the elevator car 9.
  • Fig. 2A shows the in Fig. 1 illustrated monitoring device 2 according to the first embodiment of the invention in a starting position.
  • the monitoring device 2 has a housing 20 connected to the carrier 10, on which a drive wheel 22 is rotatably mounted via an axis 21. Further, a mating gear 23 is provided which presses the actuating means 11 against the drive wheel 22.
  • Fig. 2B shows the in Fig. 2A illustrated monitoring device 2 according to the first embodiment of the invention in the starting position in a partially opened representation.
  • the monitoring device 2 has a speed wheel 26 with a plurality of rolling body receptacles 27, 28, 29, 30.
  • rolling elements 31 to 34 are arranged in the rolling body receptacles 27 to 30.
  • a switching disk 35th provided, which has a switching cam 36 with a radially outwardly extending switching cam portion 37.
  • the switching disk 35 has, as more in detail of Fig. 2C shown, an inwardly open to the Rollêtfactn 27 to 30 of the speed wheel 26 recess 38 with a driving stop 39 on. In the illustrated starting position of the indexing disk 35, the recess 38 is open at the bottom.
  • a spring element 24 is provided, wherein a bearing point 25 is formed for the spring element 24 on the carrier 10, for example by a bearing pin.
  • the spring element 24 engages the indexing disk 35 and pulls it in the direction of its starting position.
  • a switching device 40 is provided with a switch 41.
  • the switch 41 is designed in this embodiment as a mechanical switch.
  • Fig. 2D shows a schematic section through the in Fig. 2A illustrated monitoring device 2 according to the first embodiment of the invention in the starting position along the section line designated II.
  • the speed wheel 26 is configured integrally with the axis 21 in this embodiment.
  • the speed wheel 26 is driven by the drive wheel 42 by means of a gear 42.
  • the drive wheel 22 is mounted on the axis 21 via a bearing 43.
  • the indexing disk 35 is mounted on the shaft 21 via a bearing 44 and a sliding bushing 45.
  • the axle 21 rotates about its longitudinal axis 46.
  • the sliding sleeve 45 is slidably disposed along the longitudinal axis 46 on the axis 21.
  • a spring element 47 is provided, which acts on the sliding bush 45 against a direction 48 along the longitudinal axis 46.
  • the switching disk 35 is attracted against the bias of the spring member 47 in the direction 48 and then in the in the Fig. 2D shown position when the monitoring device 2 is to monitor the speed vK of the elevator car 9 and thus operates as a speed sensor.
  • the electromagnet 50 can be energized whenever the elevator car 9 is moved in the elevator shaft 3. Since the travel times are short compared to the life in practice, this results in a low average power consumption and the heat loss generated is low.
  • the speed wheel 26 Since the rolling body 31 is completely in the rolling body receiving 27 of the speed wheel 26 when passing the downwardly open recess 38 of the indexing disk 35, the speed wheel 26 does not take the indexing disk 35 with its rotation about the longitudinal axis 46. This also applies correspondingly to the other rolling bodies 32, 33, 34 when they are guided past the open recess 38 in their rolling body receptacles 28, 29, 30.
  • the indexing disk 35 has an end face 51. Furthermore, the drive wheel 22 has an end face 52. The end face 51 of the indexing disk 35 and the end face 52 of the drive wheel 22 are facing each other. When the electromagnet 50 is energized, which pulls the indexing disk 35 in the direction 48, the end faces 51, 52 are spaced apart so that they can pass each other freely.
  • the spring element 47 displaces the indexing disk 35 counter to the direction 48 to the drive wheel 22 or holds the indexing disk 35 on the drive wheel 22. If the electromagnet 50 is not energized, then lies the end face 51 of the indexing disk 35 on the end face 52 of the drive wheel 22 at. A desired contact force can be adjusted via the bias of the spring element 47.
  • the end face 51 of the indexing disk 35 and the end face 52 of the drive wheel 22 can be coupled to each other via a frictional connection and / or positive engagement.
  • a coupling device 53 which includes the end faces 51, 52 and the spring element 47, is provided, which serves for coupling the indexing disk 35 to the drive wheel (the drive pulley) 22.
  • a friction lining can be configured on the end face 51 of the indexing disk 35. Additionally or alternatively, a friction lining may also be configured on the end face 52 of the drive wheel 22. Further, via grooves, teeth or the like, the connection can be achieved in the coupled state.
  • Fig. 3A shows the in Fig. 1 illustrated monitoring device 2 according to the first embodiment of the invention in an actuated position when the indexing disk 35 is coupled via the coupling device 53 to the drive wheel 22.
  • a situation is shown in which the switching disk 35 has rotated together with the drive wheel 22 by an angle 54 which corresponds to a predetermined angle of rotation 54.
  • the switching device 40 is actuated.
  • a braking device is activated.
  • a possible application is a path limitation with an open elevator door.
  • the switching disc 35 is coupled to the drive wheel 22 at a standstill of the elevator car 9. Certain movements of the elevator car 9 are hereby tolerated, as long as these affect rotations of the drive wheel 22, which are smaller than the predetermined angle of rotation 54. However, if the predetermined rotation angle 54 is reached, the travel limit becomes active.
  • the switching device 40 at a rotation of the drive wheel 22 by the predetermined rotation angle 54, which causes a corresponding rotation of the drive wheel 22 coupled to the switching disk 35, at least indirectly actuated by the indexing disk 35 when the indexing disk 35 is coupled to the drive wheel 22.
  • Fig. 3B shows the in Fig. 3A illustrated monitoring device 2 according to the first embodiment of the invention in the actuated position when the indexing disk 35 is coupled to the drive wheel 22.
  • a mechanical actuation of the switch 41 is possible.
  • the indexing disk 35 must first rotate by the predetermined angle of rotation 54 until the actuation of the switching device 40 takes place.
  • the predetermined rotation angle 54 can be influenced by the configuration of the switching cam 36 or by the arrangement of the switching cam part 37 and by the arrangement of the switching device 40. It should be noted that in the case of the Fig. 1 illustrated arrangement according to the first embodiment, starting from a starting position in which the switching disk 35 is coupled to the drive wheel 22, a movement of the elevator car 9 is translated by a certain way in a twice the stroke of the running part 18 of the actuating means 11.
  • Fig. 3C shows a schematic section through the in Fig. 3A illustrated monitoring device 2 according to the first embodiment of the invention in the actuated position when the indexing disk 35 is coupled to the drive wheel 22, along the section line designated III.
  • the electromagnet 50 is not energized, so that the switching disk 35 is counter to the direction 48 provided by the force of the spring element 47 to the drive wheel 22 and is held on the drive wheel 22.
  • the actuation of the switching device 40 takes place, so that a corresponding measure is initiated. If, however, the predetermined rotation angle 54 is not reached, then the normal operation can be continued. For example, the doors of the elevator car 9 can be closed after loading.
  • the electromagnet 50 is then energized, so that the switching disk 35 is adjusted in the direction 48 against the force of the spring element 47. As a result, the coupling between the indexing disk 35 and the drive wheel 22 is released. However, the indexing disk 35 can be rotated from its initial position within the predetermined angle of rotation 54. The spring element 24 then ensures a provision of the indexing disk 35 in the starting position, in the FIGS. 2A and 2B is illustrated.
  • the monitoring device 2 is active in its function as a speed limiter.
  • Fig. 4 shows the in Fig. 2B illustrated monitoring device 2 in a partial, schematic representation for explaining the operation of a possible embodiment of the invention.
  • the transmission 42 allows a translation of the drive wheel 22 to the speed wheel 26, which is indicated by the factor i.
  • the rolling body 31 with the mass m is considered as an example when the speed wheel 26 rotates at the angular speed ⁇ 2. In the course of time, this consideration also applies correspondingly to the other rolling elements 32, 33, 34.
  • the rolling body 31 describes a movement along the movement path 55 when the elevator car 9 moves at an allowable or ordinary speed vK.
  • the movement path 55 is characterized by the radius r of the speed wheel 26.
  • the radius r of the speed wheel 26 is defined here in relation to the position of the rolling body 31 in its rolling body seat 27. If the rolling body 31 is located with the mass m at the highest point of the movement path 55, then acts on the rolling body 31, the centrifugal force FZ. In addition, the weight FG acts on the rolling body 31.
  • the speed limit by the monitoring device 2 is then active when the rolling body 31 enters the open recess 38 and abuts the follower stop 39 in the sequence.
  • the condition for the speed limit is, therefore, that the centrifugal force FZ becomes greater than the weight force FG as determined by the FZ > FG is specified.
  • the formula (5) describes the triggering condition for the monitoring device 2 when operating as a speed sensor.
  • the triggering condition for the speed limit is independent of the mass m of the rolling body 31.
  • the quantity determined on the right-hand side of the inequality given in formula (8) can be defined as limit velocity vG. If the speed vK of the elevator car 9 exceeds this limit speed vG, then the condition according to formula (5) is satisfied so that the rolling body 31 rolls in the downwardly open recess 38.
  • the limit speed vG can be set.
  • the predetermined limit speed vG can be arranged by the ratio i of the transmission 42, the radius R of the drive wheel 22, on which the drive wheel 22 is driven, and the radius r of the speed wheel 26 on which the rolling bodies 31 to 34 in the Roll stressesitn 27 to 30 are to be set.
  • Fig. 5 shows a diagram for explaining the operation of a possible embodiment of the invention.
  • the speed vK of the elevator car 9 is plotted on the abscissa.
  • the centrifugal force FZ, the weight FG and a sensor signal S are plotted.
  • the sensor signal S in this case describes a stroke of the rolling body 31 from its rolling body seat 27 into the recess 38 as a result of the centrifugal force FZ.
  • the in the diagram of Fig. 5 Values entered here are in each case snapshots when the rolling body 31 is located at the uppermost point of the movement path 55, as shown in FIG Fig. 4 is shown.
  • the centrifugal force FZ outweighs the weight force FG when the speed vK of the elevator car 9 exceeds the limit speed vG.
  • the sensor signal F acts in the range of the limit speed vG as a trigger signal for triggering the switching device 40.
  • the diagram can also be continued to the right for speeds vK, which are significantly greater than the limit speed vG. In practice, however, a further increase is prevented by the triggering of the switching device 40.
  • the speed wheel 26 is always connected by means of the transmission 42 with the drive wheel 22 and thus always driven by the drive wheel 22.
  • the monitoring device 2 if it operates as a speed sensor, serves to limit the speed vK of the elevator car 9 during its travel through the elevator shaft 3.
  • Fig. 6 shows the in Fig. 2D shown, schematic section through a monitoring device 2 according to a second embodiment of the invention.
  • the axis 21 has a shoulder 60 with a front side 61.
  • the speed wheel 26 has an end face 62.
  • the spring element 47 acts on the speed wheel 26 counter to the direction 48.
  • the sliding bush 45 is arranged displaceably on the axis 21 along the longitudinal axis 46.
  • the sliding bush 45 has a shoulder 63.
  • the speed wheel 26 has a shoulder 64.
  • the bearing 44 is designed in this embodiment so that it can transmit forces along the longitudinal axis 46, ie in the radial direction.
  • the bearing 44 is also clamped between the shoulder 63 of the sliding sleeve 45 and the shoulder 64 of the speed wheel 26, wherein the bias of the spring element 47 is applied.
  • the monitoring device 2 acts as a speed sensor.
  • a frictional connection and / or positive engagement is formed between the speed wheel 26 and the axis 21, between the speed wheel 26 and the axis 21, a frictional connection and / or positive engagement is formed.
  • a friction lining may be provided on the end face 62 of the speed wheel 26.
  • a friction lining may also be provided on the front side 61 of the shoulder 60 of the axle 21.
  • the bias of the spring element 47 is so great that a reliable coupling is achieved.
  • a coupling 65 is provided, which comprises the end faces 61, 62 and the spring element 47.
  • the clutch 65 is in this case between the speed wheel 46 and the drive wheel 22nd intended.
  • the clutch 65 is provided between the speed wheel 26 and the transmission 42.
  • the coupling 65 may also be provided directly between the speed wheel 26 and the drive wheel 22.
  • the speed wheel 26 in this exemplary embodiment is indirectly driven by the drive wheel 22 by means of the transmission 42.
  • a preferred application is that the monitoring device 2 according to the second embodiment is deactivated in an ordinary drive by the electromagnet 50 is energized. Thereby, the clutch 65 is released by the speed wheel 26 is removed with its end face 62 from the end face 61 of the axis 41 in the direction 48.
  • a speed limit can be realized. This may preferably be done in addition to a travel limit.
  • suitable measures can be taken at an early stage, especially with large accelerations of the elevator car 9, as can occur, for example, in the event of overloading of the elevator car 9.
  • the speed vK of the elevator car 9 during a planned standstill or stay at an access 5 to 7 can be more effectively and more limited than is possible with a pure travel limit in practice.
  • positioning the elevator car 9 may require a low speed vK of the elevator car during a crawl.
  • a pure path limitation is impractical for such purposes and not sufficient.
  • the positioning of the elevator car 9 can be on the order of one meter.
  • a pure travel limit would then be the occurrence of a fault already very high speeds vK of the elevator car 9 at the moment of Enable triggering by the path limitation.
  • the speed vK of the elevator car 9 Due to the speed limitation by means of the monitoring device 2 according to the second embodiment, the speed vK of the elevator car 9 can be continuously monitored during such a crawl. From the possible parameters, namely the radius R, the radius r and the gear ratio i, the limit speed vG can be set to a small value according to the formula (8).
  • the limit speed vG can be set to a value between 0.2 m / s to about 0.3 m / s.
  • the elevator car 9 can then be driven over a travel of, for example, 50 cm to a level of a loading area of a truck. If an error occurs in this case, then a suitable measure, in particular braking, can be initiated at an early stage. Specifically, in case of an overload of the elevator car 9 early braking can be initiated.
  • the monitoring device 2 can also be designed for speed monitoring and / or path limitation with respect to a downward movement of the elevator car 9.
  • an embodiment for direction-independent travel and / or speed limitation can also be realized.
  • recess 38 may also be provided a further driving stop, which is oriented against the driving stop 39.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP13180946.9A 2013-08-20 2013-08-20 Dispositif de surveillance pour une cabine d'ascenseur Withdrawn EP2840053A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13180946.9A EP2840053A1 (fr) 2013-08-20 2013-08-20 Dispositif de surveillance pour une cabine d'ascenseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13180946.9A EP2840053A1 (fr) 2013-08-20 2013-08-20 Dispositif de surveillance pour une cabine d'ascenseur

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EP2840053A1 true EP2840053A1 (fr) 2015-02-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258874A (zh) * 2022-08-16 2022-11-01 凯帝斯电梯股份有限公司 一种电梯防超速用电气装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD128221A1 (de) * 1976-11-29 1977-11-09 Gerhard Protz Geschwindigkeitsbegrenzer
DE3830864C1 (fr) * 1988-09-10 1989-07-27 Bongers & Deimann, 4000 Duesseldorf, De
EP0366526B1 (fr) 1988-10-25 1992-12-23 René André Marion Dispositif de freinage de sécurité
US20110186385A1 (en) * 2007-08-09 2011-08-04 Mitsubishi Electric Corporation Speed governor for an elevator
WO2012080103A1 (fr) 2010-12-17 2012-06-21 Inventio Ag Dispositif de surveillance permettant de constater un départ indésirable d'une cabine d'ascenseur à l'arrêt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD128221A1 (de) * 1976-11-29 1977-11-09 Gerhard Protz Geschwindigkeitsbegrenzer
DE3830864C1 (fr) * 1988-09-10 1989-07-27 Bongers & Deimann, 4000 Duesseldorf, De
EP0366526B1 (fr) 1988-10-25 1992-12-23 René André Marion Dispositif de freinage de sécurité
US20110186385A1 (en) * 2007-08-09 2011-08-04 Mitsubishi Electric Corporation Speed governor for an elevator
WO2012080103A1 (fr) 2010-12-17 2012-06-21 Inventio Ag Dispositif de surveillance permettant de constater un départ indésirable d'une cabine d'ascenseur à l'arrêt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258874A (zh) * 2022-08-16 2022-11-01 凯帝斯电梯股份有限公司 一种电梯防超速用电气装置
CN115258874B (zh) * 2022-08-16 2024-04-26 凯帝斯电梯股份有限公司 一种电梯防超速用电气装置

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