Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B17/00—Hoistway equipment
  • B66B17/34—Safe lift clips; Keps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
  • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
  • B66B1/3476—Load weighing or car passenger counting devices
  • B66B1/3484—Load weighing or car passenger counting devices using load cells
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B7/00—Other common features of elevators
  • B66B7/02—Guideways; Guides
  • B66B7/04—Riding means, e.g. Shoes, Rollers, between car and guiding means, e.g. rails, ropes

Definitions

• the present invention relates to a braking device for an elevator installation with which both a displaceable elevator car can be braked and load changes caused in the elevator car can be measured.
• the invention also relates to an elevator system equipped with such a braking device.
• the invention also relates to a method for measuring a load acting on an elevator car and a method for setting a force to be exerted by a drive device on an elevator car in response to a load change in the elevator car using the braking device described herein.
• an elevator car In an elevator system, an elevator car is typically relocated within a vertical elevator shaft between different levels or floors in a building. A displacement of the elevator car is brought about by a drive device which, for example, drives suspension elements holding the elevator car, such as ropes or belts.
• the elevator car is usually guided by guide rails when it is moved. In order to bring the elevator car to a stop at a desired floor, its displacement movements are generally braked by appropriate control of the drive device.
• a change in load caused by this can lead to an associated change in the suspension elements holding the elevator car resulting in an elastic change in their length. Accordingly, the position of the elevator car relative to the floor can easily change during the stop at the floor.
• a change in position of the elevator car was conventionally compensated for with the help of a so-called level compensation (re-leveling), in which the drive device targeted the the suspension means holding the elevator car is displaced in such a way that the change in position of the elevator car is counteracted. Carrying out such a level adjustment, however, requires complex measures.
• EP 1 278 694 B1 describes a load-handling device for rope elevators with an integrated load-measuring device.
• EP 0 151 949 A2 describes an alternative load measuring device for an elevator car.
• US Pat. No. 6,483,047 B1 describes a brake / load measurement system in which load measurement cells interact with a brake.
• a braking device with the aid of which an elevator car of an elevator system can advantageously be braked and which is also designed to be able to measure a change in load caused in the elevator car.
• Lemer may have a need for an elevator system equipped with such a braking device.
• an advantageous method for measuring a load acting on an elevator car there may be a need for an advantageous method for adjusting a force exerted by a drive device on an elevator car in response to a load change in the elevator car.
• a braking device for braking a displaceable elevator car of an elevator installation and for measuring in the Elevator cabin caused load changes proposed.
• the braking device has a brake for braking the elevator car relative to a stationary component of the elevator system, a brake holding arrangement for holding the brake on the elevator car, a load measuring device with a force transmission element for measuring a force acting on the force transmission element and a load measuring device holding arrangement for holding the Load measuring device on the elevator car.
• the brake and the brake holding arrangement are configured in such a way that the brake is to be held on the elevator car by means of the brake holding arrangement in such a way that the brake can be displaced relative to the elevator car in a force direction caused by the brake.
• the load measuring device and the load measuring device holding arrangement are configured such that the load measuring device is to be held on the elevator car by means of the load measuring device holding arrangement in such a way that the load measuring device is fixed relative to the elevator car in the force direction caused by the brake.
• the force transmission element of the load measuring device is operatively connected to the brake in order to be able to measure a force acting between the brake and the load measuring device due to a relative displacement of the brake relative to the load measuring device.
• the load measuring device holding arrangement and the brake holding arrangement are connected to one another in an elastically deformable manner via a web arrangement.
• an elevator installation which has an elevator car, a guide rail and a braking device according to an embodiment of the first aspect.
• the elevator car can be displaced along the guide rail.
• the braking device is held on the elevator car by means of its brake holding arrangement and its fast measuring device holding arrangement.
• the brake of the braking device is configured to cooperate with the guide rail in order to brake the elevator car.
• a method for measuring a fast acting on an elevator car comprises at least the following steps: (i) activating the brake of a braking device held on the elevator car according to an embodiment of the first aspect of the invention while the elevator car is stationary; and (ii) measuring the fast acting on the elevator car with the aid of the fast measuring device of the braking device.
• a method for setting a force to be exerted by a drive device on an elevator car in response to a load change in the elevator car is described.
• the method comprises at least the following steps: (i) measuring the change in load with the aid of a method according to an embodiment of the third aspect of the invention; and (ii) adjusting the force exerted by the drive device on the elevator car in such a way that the measured change in load is compensated.
• a basic concept of the braking device proposed here can be seen as enabling two functionalities with a single device, namely braking the elevator car and measuring a change in load caused in the elevator car.
• the braking device is essentially constructed in two parts.
• a first part comprises the brake and the brake holding arrangement.
• the brake is designed to generate forces between the elevator car and a stationary component of the elevator system such as a guide rail, the forces counteracting a movement of the elevator car or its weight in order to decelerate the movement of the elevator car provided with the brake and / or to keep stationary on the stationary component.
• the brake holding arrangement is designed to apply the brake to the elevator car.
• a second part of the braking device comprises the load measuring device and the load measuring device holding arrangement.
• the load measuring device is designed to measure loads or forces which act on a part of the load measuring device referred to herein as a force transmission element.
• the load gauge support assembly is configured to attach the load gauge to the elevator car.
• the two parts of the braking device are not only designed for different functionalities, but are also due to the different Design of their respective holding arrangement attached or held in different ways on the elevator car.
• the brake and the brake-holding arrangement are designed in such a way that the brake is specifically not fixed absolutely stationary on the elevator car by means of the brake-holding arrangement, but can be shifted at least slightly relative to the elevator car, in particular in a direction caused by the brake Force direction, ie typically a direction in which the elevator car moves during its travel or a direction opposite to this.
• the brake holding arrangement together with the brake attached to it can move within a certain tolerance range or a certain play along the car movement direction relative to the elevator car.
• the tolerance range can for example be a few tenths of a millimeter, in particular for example less than 1 mm.
• the load measuring device and the load measuring device holding arrangement are designed in such a way that the load measuring device is firmly fixed to the elevator car by means of the load measuring device holding arrangement at least in the direction of force caused by the brake, but preferably also in directions transverse to this direction of force, that is, the load measuring device is attached to the elevator car as rigidly and free of play as possible.
• the brake which is held on the elevator car with a certain degree of freedom of movement, can move at least slightly relative to the load measuring device which is rigidly fixed on the elevator car.
• the force transmission element of the load measuring device is effectively connected to the brake. If the elevator car, together with the load measuring device rigidly coupled to it, moves, for example, relative to the brake, which is held stationary on the stationary component of the elevator system when it is activated, the relative movement of the brake relative to the load measuring device accordingly generates a force via the force transmission element Transfer a suitable counter element of the load measuring device.
• This force can be measured by the load measuring device.
• the load measuring device can measure forces which act on the elevator car, in particular in its direction of movement, that is to say typically in the vertical direction. In particular, load changes in the elevator car can be determined with the aid of the load measuring device.
• the load measuring device and the brake should not only be effectively connected to one another via the force transmission element of the load measuring device that connects them.
• the load measuring device holding arrangement holding the load measuring device and the brake holding arrangement holding the brake should be connected to one another via a web arrangement.
• This web arrangement should be configured in such a way that a predominant proportion of the forces acting between the brake and the load measuring device are not transmitted via the force transmission element of the load measuring device but rather via the web arrangement.
• the web arrangement should be configured in such a way that, for example, in the event of a failure of the force transmission element, the entire forces acting between the brake and the load measuring device can also be transmitted solely via the web arrangement without the web arrangement tearing.
• the web arrangement should be configured in such a way that it connects the load measuring device holding arrangement and the brake holding arrangement in such a way that the web arrangement is mainly only elastically deformed, i.e. no irreversible plastic deformation, at least when the forces are not excessive is effected.
• only elastic deformations should occur on the web arrangement in the case of forces which roughly correspond to the weight of the elevator car including its maximum permissible payload.
• the load measuring device holding arrangement is elastically deformable connected to the brake holding arrangement via the web arrangement can, among other things, ensure that only a small part of the forces caused between the brake and the load measuring device when they move relative to one another actually act on the load measuring device. Accordingly, the load measuring device designed to be weaker than would be the case if all of the forces were transferred to them.
• the forces that are proportionally transmitted to the load measuring device can always be essentially proportional to the total forces acting between the brake and the elevator car.
• the load measuring device can be used to measure the forces acting on the elevator car or the load changes caused in the elevator car in a very precise and reproducible manner despite its mechanically relatively weak design.
• the brake and the brake-holding arrangement are configured in such a way that the brake is to be held on the elevator car by means of the brake-holding arrangement in such a way that the brake is at most up to a predetermined position in the direction of force caused by the brake relative to the Can relocate elevator cabin.
• the brake-holding arrangement in particular can be designed in such a way that the brake attached to it can be attached to the elevator car with a certain amount of play, so that the brake can be easily moved relative to the elevator car within a tolerance range due to the forces caused when the brake is activated Moving elevator car.
• the tolerance range should be clearly limited so that the brake cannot be displaced beyond a maximum predetermined position relative to the elevator car.
• one end of the tolerance range can be implemented by a mechanical stop provided on the brake holding arrangement, up to which a fixing element rigidly coupled to the elevator car can be displaced relative to the brake holding arrangement, beyond which the fixing element, however, cannot be moved.
• the brake is indeed applied with relatively small forces, for example up to the weight forces of the one to be held Elevator car, although it can move slightly relative to the elevator car, in the event of significantly higher forces, as can occur, for example, in the case of emergency braking, the relative movement between the brake and the elevator car is limited to the maximum predetermined position by the stop provided.
• the safety of the braking functionality of the proposed braking device can be increased.
• the brake holding arrangement can have elongated holes, the longitudinal direction of which extends parallel to the direction of force caused by the brake and through which fixing elements held in place on the elevator car can extend in order to hold the brake holding arrangement on the elevator car.
• two or more elongated holes can be provided in the brake holding arrangement, through which fixing elements such as screws or bolts, for example, which are firmly connected to the elevator car, can run.
• An elongated hole can be an elongated through opening which has larger dimensions in a direction parallel to the direction of force caused by the brake, i.e. in a length direction, than in a direction transverse to this, i.e. in a width direction.
• the dimensions in the width direction can essentially correspond to those of the fixing element running through the elongated hole, so that there is a form fit in the width direction, whereas the dimensions in the length direction can be at least slightly larger than those of the fixing element so that the fixing element is inside can move a tolerance range defined by the elongated hole along the direction of force.
• Longitudinal ends of the elongated hole act as a mechanical limit for a relative movement of the brake in the longitudinal direction. This means that the longitudinal ends form a mechanical stop that specifies the position up to which the brake and the elevator car can be displaced relative to one another.
• the elevator car can extend through the elongated holes of the brake holding arrangement Moving the fixing elements up to the longitudinal ends of the elongated holes relative to the brake. A further shift is avoided by the form fit then occurring between the fixing elements and the ends of the elongated holes. Accordingly, the high forces occurring, for example, during emergency braking can be transmitted between the brake and the elevator car via the fixing elements and the brake-holding arrangement.
• the web arrangement is arranged, dimensioned and configured in such a way that the web arrangement is essentially exclusively elastic in the event of a force transmitted between the brake holding arrangement and the load measuring device holding arrangement, which corresponds to a weight of the elevator car including a maximum permissible payload of the elevator car deformed.
• the web arrangement can extend between the brake holding arrangement and the load measuring device holding arrangement in such a way that it only experiences an elastic deformation under forces that typically occur during normal operation of the elevator system, for example when the elevator car is to be held on a floor.
• the spatial arrangement of the web arrangement ie in particular its position, orientation and / or direction of extent, can affect its mechanical load-bearing capacity and / or its elastic deformability.
• the dimensioning of the bar arrangement ie in particular its cross section, width, length, height, etc., can have an effect on the load-bearing capacity and / or elastic deformability of the bar arrangement.
• further configuration parameters such as a material used, processing carried out during manufacture, etc. can influence the load-bearing capacity and / or elastic deformability of the bar arrangement.
• the web arrangement can be arranged, dimensioned and configured in such a way that the web arrangement changes by less in the case of a force transmitted between the brake holding arrangement and the load measuring device holding arrangement, which corresponds to a weight of the elevator car including a maximum permissible payload of the elevator car than 1 mm, preferably less than 0.5 mm and more preferably only between 0.05 mm and 0.3 mm, deformed in the direction of force caused by the brake.
• the elevator car should be able to move slightly relative to the brake during a braking process.
• the extent of this relative movement should, however, be limited by the specifically selected configuration of the bar arrangement to such an extent that in the normal case no relative movements of, for example, more than 0.5 mm occur. For many applications it can even be advantageous if the bar arrangement normally only allows relative movements of less than 0.2 mm.
• the normally permissible relative movements should be smaller than the tolerance range within which the elevator car can be moved relative to the brake before the elevator car is prevented from further relative movement when it reaches a maximum permissible relative movement at a predetermined position, for example by its fixing element strikes the end of the elongated hole.
• the web arrangement should preferably only allow relative movements between the elevator car and the brake that are shorter than, for example, the tolerance range specified by the elongated holes of the brake-holding arrangement.
• the web arrangement extends at least in a partial area transversely to the direction of force caused by the brake. If the web arrangement between the brake holding arrangement and the load measuring device holding arrangement were to extend over its entire length parallel to the direction of force caused by the brake, relative displacements between the two holding arrangements could only occur if the web arrangement itself could change its length elastically. However, this can be difficult with materials such as metals, which are to be used for the web arrangement in order to be able to withstand the forces acting on it.
• the aim is therefore to have the web arrangement run transversely to the direction of force caused by the brake, at least in a partial area.
• the web arrangement can extend linearly over its entire length and at an angle to the direction of force caused.
• the web arrangement can have curvatures and run obliquely to the direction of force caused only in partial areas. In the partial areas running obliquely to the direction of force, the forces acting during braking can allow the web arrangement to bend instead of elongating the entire web arrangement, so that the two holding arrangements located at the opposite ends of the web arrangement can move relative to one another in the direction of force.
• the local bending of the web arrangement can take place with a suitable design of the web arrangement, in particular with a suitable orientation, a suitable cross section and / or a suitable choice of material for the web arrangement, by elastic deformation.
• the brake holding arrangement, the load measuring device holding arrangement and the web arrangement are formed in one piece with a common component.
• the brake holding arrangement, the load measuring device holding arrangement and the web arrangement can be formed in one piece with a common stamped sheet metal part.
• a single component such as a sheet metal stamped into a suitable shape can form both the brake holding arrangement and the load measuring device holding arrangement as well as the web arrangement extending between these two.
• the entire component can be easy to manufacture and can be adapted to the forces to be absorbed and transmitted, for example, by a suitable choice of a sheet metal used, in particular with regard to a thickness of the sheet metal and a material of the sheet metal.
• the one-piece design of all areas of such a component can, for example, avoid increased wear and tear at weak points, as would otherwise occur in a multi-part component at transitions between segments of the multi-part component.
• the one-piece component can also withstand repeated mechanical loads over the long term.
• Possibilities can be created in the two holding arrangements in order to be able to fix them to the elevator car.
• round holes can be provided on the load measuring device holding arrangement, for example, in order to be able to fix them to the elevator car with bolts or screws.
• Elongated holes through which bolts or screws can also extend can be provided on the brake holding arrangement. Both the round holes and the elongated holes can be punched into the sheet metal forming the holding arrangements.
• the force transmission element can be connected to a counter element of the load measuring device that is fixed to the load measuring device holding arrangement via a strain gauge.
• a strain gauge can be used to measure the forces acting on the load measuring device via the force transmission element.
• the forces that act between the brake holding arrangement and the load measuring device holding arrangement when the brake is activated can be measured.
• the strain gauge enables a very robust design of the load measuring device.
• the strain gauge enables the forces acting to be measured very precisely and reproducibly.
• the load measuring device can be configured to generate an electrical signal which reproduces the force acting on the force transmission element.
• the load measuring device can have a sensor system that can monitor physical parameters that allow conclusions to be drawn about the forces acting on the force transmission element.
• the sensors can generate electrical signals depending on the monitored physical parameters.
• Such electrical signals can be passed on in a simple manner and, for example, transferred to a control of the elevator installation or an external monitoring device. Based on the signals, conclusions can then be drawn about the forces acting on the elevator car. For example, in this way the control of the elevator system can be communicated which payload is currently located in the elevator car, so that the control can control the drive device in accordance with the load.
• the brake of the braking device described can be configured as a holding brake to hold the elevator car stationary against its weight during a stop.
• it can be preferred to additionally configure the brake as a safety brake in order to brake the elevator car in an emergency in the event of a free fall.
• the brake should at least be designed in such a way that with its help the elevator car can be held stationary on the stationary component of the elevator system that interacts with the brake, i.e. for example on a guide rail, while the elevator car is stopped on a floor, for example.
• the brake can prevent the elevator car from moving due to load changes when passengers get on or off the elevator car.
• the brake can be even more resilient so that it can also act as a safety brake.
• the brake should be configured to be able to bring about very high forces between the elevator car and the stationary component, in order to prevent the elevator car, for example, even in the event that all suspension elements holding it should tear and the elevator car would fall freely, to be able to brake to a standstill at a short distance.
• the web arrangement can be configured to be sufficiently stable on the one hand so that it does not tear under the high forces, plastic deformations of the web arrangement being permissible in such an exceptional case could be.
• the brake holding arrangement itself can be designed and fastened to the elevator car, for example by suitably dimensioning its elongated holes, in such a way that it remains reliably held on the elevator car in the event of a safety brake.
• an elevator car on which the brake-holding arrangement and the load-measuring device-holding arrangement of the braking device are held, with its brake, for example, can thus reliably in an elevator system according to an embodiment of the second aspect of the invention the guide rail cooperate in order to be able to brake the elevator car.
• the braking device can be used within the scope of a method according to an embodiment of the third aspect of the invention in order to be able to measure the current load acting on the elevator car.
• temporary load changes can be measured.
• the brake of the braking device can be activated for this purpose while the elevator car is gradually stopped on a floor and is at a standstill.
• the brake can, for example, only be activated after the elevator car has been stopped on the floor by suitable control of the drive device.
• the brake can be used to actively brake a movement of the elevator car down to a standstill, the brake then being able to remain activated during the standstill.
• the activated brake can prevent the elevator car from moving during a stop at a floor, for example when passengers get on or off. However, when passengers get on or off, the load in the elevator car changes.
• its load measuring device can be used for this purpose to determine such load changes. Among other things, this can be used to detect overcrowding in the elevator car and thus an overload.
• a load change in the car can be measured with the method described and the information obtained in the process can be used to adjust the force exerted by the drive device on the elevator car in such a way that the measured load change compensates becomes.
• the load measuring device can first be used to measure how much the elevator car becomes heavier or lighter as a result of passengers getting on or off. Without appropriate countermeasures, the change in load would lead to the elevator car dropping suddenly or sliding upward when the holding brake is subsequently released, since the elastic suspension elements that hold the elevator car would lengthen or shorten as a result of the change in load.
• the drive device can be controlled accordingly in order to be able to suitably adapt the force acting on the suspension means even before the holding brake is released, so that when the holding brake is released there is no sagging or sliding up of the Elevator cabin is coming.
• the process described can also be referred to as an adaptation to be carried out in advance of the torque to be produced by the drive device (English: pre-torqueing).
• the described method can be carried out in a particularly simple manner if a force measured by the load measuring device is measured as a reference force before the change in load occurs.
• the force exerted on the elevator car can then be set after the brake has been activated and after the load change in the elevator car has taken place in such a way that the load measuring device measures a force corresponding to the reference force.
• a current one can be used The value of the force measured by it can be determined and stored as a reference value. If there is then a change in load within the elevator car due to a changed number of passengers, this can be recognized by the load measuring device.
• the drive device can only be activated to successively change its torque. At the same time it can be monitored how the current force measured by the load measuring device changes. If this corresponds to the reference value initially determined, this means that the torque produced by the drive device is suitably set in order to be able to compensate for the load change that has taken place in the meantime, so that the brake can be released without a sudden change in the position of the elevator car .
• the device and the method can be used to ensure that there is no longer a maintenance technician in the cabin. For example, before switching from normal operation to maintenance operation, the car weight can be measured and this value can then be compared with a value measured after the maintenance work before switching back to normal operation. If there is a discrepancy, switching back to normal operation can be prevented. This is particularly advantageous in elevator systems that have no head space, since it is important to avoid under all circumstances that the elevator system is in normal operation when there are people in the shaft.
• the load measurement on the brake of the cabin allows, as above and described below, such a use.
• Fig. 1 shows roughly schematically an elevator installation according to an embodiment of the present invention.
• Fig. 2 shows roughly schematically an elevator installation according to an alternative embodiment of the present invention.
• Fig. 3 shows a perspective view of a braking device according to an embodiment of the present invention.
• Figs. 1 and 2 show differently configured elevator systems 1 with a braking device 15 according to two embodiments of the present invention.
• a specific embodiment of the braking device 15 is shown larger and with more details.
• the elevator installation 1 shown in FIG. 1 comprises an elevator cage 3, which can be held by, for example, rope-like or belt-like suspension means 5 and displaced in an elevator shaft 11.
• the support means 5 can be displaced by a drive device 7.
• the drive device 7 is of a Control 9 controlled.
• the elevator car 3 is guided on both sides on at least one guide rail 13 serving as a stationary component 14.
• the elevator car 3 can, after it has been moved to the desired position with the drive device 7, with the aid of brakes 17 provided on its braking devices 15 are temporarily fixed on the stationary guide rails 13.
• Each of the brakes 17 is fastened, for example, to a frame of the elevator car 3 with the aid of brake holding arrangements 19.
• At least one of the braking devices 15 also has a load measuring device 21.
• the load measuring device 21 has a force transmission element 25 and a counter element 29. Between the force transmission element 25 and the counter element 29, the load measuring device 21 can have a sensor, for example in the form of a strain gauge 27, with the help of which a the force acting on the load measuring device 21 between its force transmission element 25 and its counter element 29 can be measured.
• the load measuring device 21 can, for example, have evaluation electronics in its counter element 29, with the aid of which the measuring parameters prevailing at the sensor can be converted into electrical signals.
• the load measuring device 21 is also attached to the elevator car 3 via a load measuring device holding arrangement 23.
• FIG. 2 shows a further embodiment of an elevator system 1 according to the invention.
• the braking device 15 is only shown schematically and can be configured in a detail similar to that of the embodiment shown in FIG.
• the elevator installation 1 has an elevator car 3 and two counterweights 8.
• the elevator installation 1 comprises two drive devices 7, these being arranged in a shaft pit 10 of an elevator shaft 11.
• the traction and suspension are separate, that is to say two traction support means 4 (under the cabin) and two suspension support means 6 (above the cabin) are used.
• a braking device 15, as described above and below, proves to be particularly advantageous when used in such an elevator system 1, since braking on the drive devices 7, i.e. via traction support means 4, which are not tensioned by the weight of the elevator car 3, is avoided can be.
• the two drive devices are arranged at the top in the shaft head 12 of the elevator shaft 11 (not shown).
• the load measurement can only be present on one braking device 15.
• the load measuring device holding arrangement 23 and the brake holding arrangement 19 are connected to one another so as to be mechanically loadable via a web arrangement 31.
• a plurality of elongated holes 35 are formed in the brake holding arrangement 19.
• a longitudinal direction of the elongated holes 35 is essentially parallel to a force direction 39 in which a force caused by the brake 17 is directed.
• the direction of force 39 essentially corresponds to the direction of movement of the elevator car 3 and is thus essentially vertical.
• the length of the elongated holes 35 can, for example, be approximately 0.5 mm greater than their width.
• the multiple elongated holes 35 are arranged linearly one above the other along the direction of force 39.
• a fixing element 36 for example in the form of a bolt or a screw, which can be fixed to the elevator car 3 or to its frame, can extend through each of the elongated holes 35.
• the brake holding arrangement 19 can thus be held on the elevator car 3 via the fixing elements 36, but can be moved slightly vertically relative to the elevator car 3 by displacing the fixing elements 36 within the elongated holes 35.
• the load measuring device holding arrangement 23 has several round holes 33. Fixing elements (not shown) can in turn run through the round holes 33, via which the load measuring device holding arrangement 23 can be fastened to the elevator car 3 or its frame, essentially without play.
• the brake 17 held by the brake holding arrangement 19 can shift slightly along the force direction 39 relative to the load measuring device holding arrangement 23 or relative to the elevator car 3 if a force is caused in the force direction 39 by activating the brake 17.
• Such a relative displacement causes, among other things, a deformation of the web arrangement 31.
• the web arrangement 31 is arranged, dimensioned and configured in such a way that this deformation generally takes place elastically, at least as long as the brake 17 only produces forces that hold the elevator car 3 and whose payload is required, for example, during a stop on a floor.
• the relative displacements between the brake 17 and the car 3 caused when the brake 17 is activated can, however, also be used in addition to be able to measure loads or load changes currently acting on the elevator car 3 with the aid of the load measuring device 21.
• the counter element 29 of the load measuring device 21 is firmly connected to the load measuring device holding arrangement 23, for example screwed.
• the force transmission element 25 is coupled, for example, to a part of the brake holding arrangement 19 and thus operatively connected to the brake 17.
• the aid of electronics (not shown) arranged in the counter element 29, for example, mechanical stresses such as those that arise in the strain gauges 27 arranged between the force transmission element 25 and the counter element 29 due to the forces caused by the relative displacement can be measured.
• the electronics can then generate an electrical signal which can serve as a measure for the force experienced by the load measuring device 21.
• the braking device 15 can thus not only be used with its brake 17 to brake the elevator car 3, but also with its load measuring device 21 to measure a load acting on the elevator car 3.
• the elevator car 3 can be driven to a floor, for example with the drive device 7.
• the brake 17 of the braking device 15 can be activated, for example via a control line 37, before the car doors are opened.
• the load measuring device 21 can be used to measure a force currently acting between the brake 17 and the elevator car 3.
• this force can for example be zero, in particular for the Pall that the elevator car 3 was braked to a standstill exclusively by controlling the drive device 7 and the brake 17 was only activated afterwards.
• this force can also be unequal to zero.
• This previously measured force can be saved as a reference value.
• the information about the measured load changes can be used to vary the forces exerted on the elevator car 7 via the suspension means 5 with the aid of targeted control of the drive device 7 in such a way that the load changes that have occurred in the meantime are compensated.
• the drive device 7 can change the forces acting on the elevator car 3 via the suspension means 5 until the force currently measured by the load measuring device 21 again agrees with the previously determined reference value.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Automation & Control Theory (AREA)
• Computer Networks & Wireless Communication (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Elevator Control (AREA)
• Indicating And Signalling Devices For Elevators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=68424825

Family Applications (1)

Country Status (8)

Families Citing this family (6)

Family Cites Families (22)

• 2020
  • 2020-10-29 KR KR1020227014116A patent/KR20220084065A/ko active Search and Examination
  • 2020-10-29 EP EP20796610.2A patent/EP4051613A1/de active Pending
  • 2020-10-29 WO PCT/EP2020/080403 patent/WO2021084012A1/de unknown
  • 2020-10-29 JP JP2022525305A patent/JP2022554006A/ja active Pending
  • 2020-10-29 US US17/755,157 patent/US11772933B2/en active Active
  • 2020-10-29 CN CN202080076633.4A patent/CN114616202B/zh active Active
  • 2020-10-29 AU AU2020376295A patent/AU2020376295B2/en active Active
  • 2020-10-29 BR BR112022007765A patent/BR112022007765A2/pt unknown

Also Published As

Similar Documents

Legal Events