EP3924283A1 - Aufzuganlage mit kabinenerdung - Google Patents
Aufzuganlage mit kabinenerdungInfo
- Publication number
- EP3924283A1 EP3924283A1 EP20705164.0A EP20705164A EP3924283A1 EP 3924283 A1 EP3924283 A1 EP 3924283A1 EP 20705164 A EP20705164 A EP 20705164A EP 3924283 A1 EP3924283 A1 EP 3924283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- car
- elevator
- running body
- installation according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B66B7/046—Rollers
Definitions
- the invention relates to an elevator system with at least one elevator car that can be moved in one direction of travel along the elevator shaft.
- Elevators are used to transport passengers between different floors of a building.
- a car is moved between the floors within an elevator shaft.
- the car is traditionally connected to a counterweight via a support cable, the cable running over a driven drive pulley.
- Alternative elevator systems no longer use counterweights and are driven by linear drives that are integrated into the rails and cars.
- the car is then equipped, for example, with permanent magnets, which are acted upon by magnetic fields by coils arranged along the elevator shaft. In this way, the driving force is transmitted to the car.
- traditional cars are connected to the shaft wall of the elevator shaft via a traveling cable.
- This traveling cable ensures that the car is supplied with energy, which is used, for example, to operate the interior lighting of the car and the control elements inside the car.
- the elevator car In newer elevator systems, however, the elevator car is not only moved up and down, but also between several vertically extending elevator shafts.
- Such an elevator system is known, for example, from JP H06-48672. Any connection of the car to the shaft wall via a cable, in particular a traveling cable for power supply, can therefore only be implemented with great difficulty in such systems.
- the car is supplied with energy, for example, via energy storage devices in the car. These energy stores are then occasionally charged while the car is stopped by briefly bringing a current collector of the car into contact with a power source.
- One possible variant is described in DE 10 2016 223 913.
- the object of the present invention is therefore to provide an elevator system in which charging of the car is largely avoided even without a cable or rope connection of the car to the building.
- This object is achieved by an elevator system according to claim 1.
- This elevator system comprises at least one elevator car that is movable along a guide rail in an elevator shaft. Furthermore, the elevator system has at least one first roller, via which the elevator car is connected to the guide rail in an electrically conductive manner. In particular, the role is arranged between the car and the guide rail.
- the first roller is designed as a grounding roller.
- An electrically conductive connection between the car and the guide rail is thus permanently provided via the first roller, so that the car cannot be highly charged.
- the permanent contact ensures that no voltage peaks can occur during discharge.
- the first roller is advantageously guided along the guide rail when the car is moved.
- the at least one car is advantageously also guided along the guide rail during movement.
- the guide rail is electrically grounded.
- the guide rail is thus advantageously also a grounding rail.
- the first roller has a first running body with a running surface and a first central body, the electrical resistance between the running surface and the first central body being less than 10 5 ohms (ie 100 kOhm), in particular less than 2xl0 4 ohms (ie 20 kOhm) is. In particular, the resistance is between 5xl0 3 ohms and 1.5xl0 4 ohms (ie between 5 kOhm and 15 kOhm).
- Guide rollers for cars typically have a cylindrical, metallic central body. The running body is then arranged around this central body. This usually consists of an insulating plastic. For this reason, there is no conductive connection between the car and the guide rails in conventional guide rollers. In the case of the first roller according to the invention, however, the first running body is specially developed so that the electrical resistance between the outer running surface and the inner central body lies in the above-mentioned range.
- the first roller has a first running body with a running surface, the first running body having an end face with a coating to increase the conductivity.
- Applying a coating is a relatively simple way of generating suitable conductivity without significantly changing the running properties of the first roller.
- the first running body can be made of a known material. The running properties of the first running body are thus known.
- the coating on the front side has no significant influence on the running properties.
- the first roller has a first running body with a running surface, the running body comprising a plastic with an additive to increase the conductivity.
- thermoplastic polyurethane is used in particular as the plastic for the first running body. This material is known for guide rollers and has good long-term stability and little abrasion.
- Conductive additives to increase conductivity include, for example, carbon fibers, carbon nanotubes or at least one salt. The embedding of these substances in plastic has been tried and tested and has only a minor influence on the physical properties of the plastic.
- the first roller comprises a second running body, the electrical resistance of the first running body being lower than the electrical resistance of the second running body.
- the first role thus comprises two running bodies, one of the running bodies, in particular the first running body, being suitably modified in order to perform the function of grounding.
- the other running body, in particular the second running body remains unchanged and serves as a guide roller.
- the first roller can be used as a normal guide roller and at the same time serves as grounding.
- the second running body is harder than the first running body, so that the first running body is relieved.
- the forces between the car and the guide rails are thus transmitted via the second running body, which is designed like an ordinary running body of a guide roller, while the electrical line runs over the first running body.
- the fact that the forces between the car and the guide rail essentially run via the second running body result in more options for the design of the first running body, in particular when choosing an additive to increase the conductivity. It is also possible to use softer materials or materials with higher abrasion for the first running body.
- the first roller is mounted on a roller carrier of the elevator car.
- the roller carrier is electrically conductive.
- the first roller is advantageously resiliently mounted on the roller carrier of the elevator car. This has the advantage that the first roller is pressed against the guide rails with a preset pressure force. This force can be adjusted so that on the one hand there is a permanent electrically conductive connection, but on the other hand the first roller is not mechanically stressed too much by unnecessarily high forces.
- the first roller is arranged on a shaft, in particular on an electrically conductive shaft.
- the shaft is advantageously arranged on the roller carrier.
- the shaft additionally comprises a sliding contact, in particular a slip ring, the electrically conductive connection between the elevator car and the guide rail being made via the sliding contact and the first roller.
- the sliding contact, especially the slip ring takes care of this advantageously for a low-wear and low-resistance transition between the stationary part, ie in particular the roller carrier, and the rotating part of the grounding roller.
- a contact element in particular a multi-strand cable, connects the sliding contact, in particular the slip ring, to the elevator car in an electrically conductive manner.
- a multi-strand cable advantageously represents a cost-effective contact element.
- the relative movement of the shaft to the roller carrier that occurs during operation of the elevator system is advantageously compensated for via the contact element.
- a defined resistance between the car and guide rail can be set, such as would not be achievable, for example, if only grounding via conductive rollers running on rails. This is due to the fact that with sole earthing via running rollers, the resistance is influenced by dirt or oil on the rails, the condition of the roller bearings, their lubrication or the wear and tear of the running surfaces.
- the elevator system comprises a pressing device, the first roller being pressed against the guide rail by means of the pressing device, in particular also when moving the car.
- Driving over gaps thus advantageously has no effect on the earthing of the car.
- gaps can be present in particular in multi-car elevator systems driven by linear motor drives at the transition to the so-called exchanger, which enables the car to be changed between different elevator shafts, for example from a vertical elevator shaft to a horizontal elevator shaft.
- the pressing device comprises a bearing in which the shaft is rotatably mounted.
- the bearing is in particular a roller bearing, further in particular a ball bearing.
- the bearing is advantageously electrically insulated from the roller carrier, preferably in that at least one insulating element is arranged between the bearing and the roller carrier.
- the bearing that supports the rotating part, in particular the shaft is advantageously electrically insulated from the stationary part, in particular from the roller carrier, in order to ensure that the charges are always on the rotating part via the sliding contact, in particular the slip ring, so in particular the wave, are transmitted.
- a further embodiment of the elevator system provides that the elevator system comprises at least one guide roller which is arranged between the elevator car and the guide rail in such a way that the first roller is relieved.
- the elevator system comprises a discharge element.
- the first roller has a first running body, the first running body being designed such that a roller axis of the first roller is at a smaller distance from the guide rail in a static state than in a dynamic state. This has the effect that the discharge element is in contact with the guide rail in the static state and has moved away from the guide rail in the dynamic state. This has the effect that each time the car is stopped, electrical contact is established between the car and the guide rails via the discharge element. At the same time, the electrical contact is interrupted again when the car starts up. As a result, the discharge element does not rub against the guide rail during travel. Particularly advantageous for this change in distance achieved by the dynamic behavior of the material of the first running body.
- the first running body has a soft material, in particular a soft plastic, in particular a soft elastomer.
- the first running body is then pressed in by the forces between the car and the guide rail.
- the dynamic behavior of the soft material of the first running body namely in particular the flexing of the running body, means that this indentation is reduced.
- the dynamic distance, i.e. the distance during travel, between the roller axis and the guide rails is therefore greater than the static distance. This change in distance ensures that the electrical contact between the discharge element and guide rail is established when stopping and is interrupted again when starting. Additional activation or regulation is not required, which makes it particularly cost-effective to use.
- FIG. 1 shows an elevator installation in an exemplary embodiment
- FIG. 2 shows a plan view of a car with a linear drive in an exemplary manner
- FIG. 3 shows an elevation of a section of a linear drive
- FIG. 4 an enlarged detail of an elevator installation with a first roller as
- FIG. 5 shows a plan view of a two-part first roller as a grounding roller
- FIG. 6 shows a plan view of a first roller with a coating as a grounding roller
- FIG. 7a shows a side view of a first roller during a stop
- FIG. 7b shows a side view of a first roller while driving
- FIG. 8 a further exemplary embodiment for an elevator installation in a sectional illustration.
- FIG. 1 shows a rope-free elevator installation 20 in an exemplary embodiment which can be used in a structure or a building 22 with different levels or floors 24.
- the elevator installation 20 comprises an elevator shaft 26 and at least one elevator car 28 which is movable in one direction of travel in the elevator shaft.
- the elevator shaft 26 can, for example, comprise three lanes 30, 32, 34. Any number of cars 28 can be moved along one of the lanes 30, 32, 34 in any direction of travel (upwards or downwards). For example, as shown, the cars 28 may travel in an upward direction on the carriageways 30 and 34, while the cars 28 can travel in the downward direction on the carriageway 32.
- Above the top floor 24 there is an upper transfer device 36 which enables the cars 28 to change between the lanes 30, 32, 34.
- a lower transfer device 38 which also enables the cars 28 to switch between the lanes 30, 32, 34.
- the upper and lower transfer devices 36, 38 are alternatively arranged in the top and bottom floor 24 themselves instead of above or below the top or bottom floor 24.
- the transfer devices can also be located in any intermediate Floor 24 be arranged.
- the elevator installation 20 it is likewise also possible for the elevator installation 20 to have one or more relocation devices which are arranged in the vertical direction between an upper and a lower relocation device 36, 38.
- the linear drive 40 has primary parts 42 (for example four primary parts shown in FIG. 2) which are arranged in a stationary manner.
- the Primary parts attached at least indirectly to a shaft wall.
- the linear drive has movable secondary parts 44 (for example four secondary parts 44 in FIG. 2).
- the primary parts 42 comprise coils 48 which are arranged on one or both sides of the roadway.
- the secondary parts 44 include permanent magnets 50 which are attached to one or both sides of the cars 28.
- the primary parts 42 generate a magnetic field based on a control signal. In this way, a force is applied to the secondary parts 44 in order to realize a movement of the cars 28 in their lanes 30, 32, 34.
- a first pair of secondary parts 44 of the linear drive 40 are attached to a first side of the car 28, and a second pair of secondary parts 44 are attached to an opposite side of the car 28.
- the primary parts are arranged between the secondary parts 44 of a pair.
- any number of secondary parts 44 can be fastened to the car 28 and interact with any number of primary parts 42 which are arranged in a stationary manner.
- FIG. 4 shows an enlarged detail of an elevator installation 20.
- a side view of elevator car 28 and guide rail 52 is shown.
- a first roller 54 is arranged between elevator car 28 and guide rail 52.
- the first roller 54 has a first central body 56 and a first running body 58.
- the first central body 56 to typically made of metal and comprises in particular a bearing that ensures the rotatability of the first roller about a central axis.
- the running body 58 encloses the central body 56 and has an essentially cylindrical shape with two end faces and a running surface.
- the running surface 60 touches the guide rail 52.
- the running body 58 comprises a plastic, in particular a thermoplastic polyurethane.
- the first roller 54 is designed as a grounding roller. This means that any tension that has built up on the car can be discharged via the first roller.
- the running body 58 of ordinary guide rollers is made of an insulating material.
- the first roller 54 shown has a running body 58 with an increased conductivity.
- the electrical resistance between the running surface 60 and the central body 56 is in the range of 10 4 ohms.
- This increased conductivity is achieved by adding an additive to the material of the running body 58 to increase the conductivity.
- the running body 58 comprises a plastic, in particular a thermoplastic polyurethane, to which a corresponding additive is added.
- the addition of these substances also has some disadvantages.
- the abrasion can increase and thus reduce the durability of the first roller 54.
- the abrasion can increase and thus reduce the durability of the first roller 54.
- the abrasion can increase and thus reduce the durability of the first roller 54.
- the further problem arises that the fibers or carbon nanotubes can break when the material is loaded.
- Such a material load can occur in the case of guide rollers, since in some cases larger forces are transmitted from the car to the guide rail via the guide roller.
- these forces do not act uniformly, but rather always at a different point on the running body of the guide roller due to the rolling of the guide roller on the guide rail.
- the running body of the guide roller is therefore flexed. This constant flexing can also lead to breakage of the fibers or carbon nanotubes. Breaking the fibers or carbon nanotubes has the disadvantage that the conductivity is reduced and the desired effect is no longer achieved over time.
- the running body 58 of the first roller 54 is relieved.
- this is achieved in that the first roller 54 is resiliently mounted on a roller carrier 62 of the elevator car 28.
- the roller axis 64 of the first roller 54 is connected to the roller carrier 62 via the connecting element 66 and the spring 68.
- the spring 68 is shown schematically in Figure 4 as a mechanical spring. Alternatively, hydraulic or pneumatic suspension can also be used.
- the elevator system 20 comprises at least one guide roller 70 which is arranged between the elevator car 28 and the guide rail 52. The guide roller 70 is arranged adjacent to the first roller 54 on the car 28.
- the transmission of forces between the car 28 and the guide rail 52 takes place via the guide roller 70 in this arrangement.
- the first roller 54 is only pressed against the guide rail 52 with the aid of the spring 68, so that the electrical contact between the first roller 54 and the guide rail 52 remains stable.
- FIG. 5 shows a plan view of the area between the car 28 and the guide rail 52.
- a first roller 54 is arranged between the car 28 and the guide rail 52.
- the first roller 54 has a first central body 56 and a first running body 58.
- the first roller 54 comprises a second running body 72.
- the second running body 72 is in this variant harder than the first running body 58.
- the power transmission between the car 28 and the guide rail 52 therefore takes place essentially via the second running body 72.
- the first running body 58 is relieved. This protects the material of the first running body 58.
- the first running body 58 serves to ensure that a tension that has built up on the car 28 can be discharged via the first running body 58.
- the first running body 58 has an electrical resistance which is lower than the electrical resistance of the second running body 72.
- the first running body 72 is designed as in the embodiment according to FIG.
- FIG. 6 shows yet another variant of the embodiment of the first roller 54 as a grounding roller.
- the illustration corresponds to the illustration in FIG. 5, the same elements being provided with the same reference symbols.
- the voltage is discharged in that the first running body 58 has an end face 74 with a coating 76 to increase the conductivity. In this case, the voltage is diverted into the guide rail 52 via the central body 58 and the coating 76.
- this variant can also be combined with the embodiments of FIGS. 4 and / or 5, so that each effect contributes to the desired higher conductivity.
- FIGS. 7a and 7b show a further alternative variant for the implementation of the first roller 54 as a grounding roller.
- the illustration corresponds to the illustration in FIG. 4, the same elements being provided with the same reference symbols.
- the voltage is discharged in that the elevator system comprises a discharge element 78 and the first running body 58 comprises a soft material, in particular a soft plastic, particularly preferably a soft elastomer.
- FIG. 7a shows the arrangement when the car 28 is at a standstill. Due to the soft material of the first running body 58, the first running body 58 is pressed in. The roller axis 64 then has a static distance d s from the guide rail 52.
- the discharge element 78 is in contact with the guide rail 52, so that there is an electrical connection between the car 28 and the guide rails 52 for grounding.
- FIG. 7B shows the same arrangement with a moving car 28.
- the dynamic behavior of the soft material of the first running body 58 (flexing of the running body) leads to the dynamic distance d D between the running axis 64 and guide rails 52 being greater than the static distance d s .
- This increase in distance has the effect that the discharge element 78 has moved away from the guide rail 52.
- the discharge element 78 therefore does not drag along the guide rail 52 while driving, so that excessive wear does not occur either.
- this Discharge element 78 fastened to the car 28 via the holder of the first roller 54.
- FIG. 8 shows a further advantageous exemplary embodiment for an elevator system designed according to the invention, only the arrangement of the earthing structure on the elevator car 28 being shown in FIG. 8 in a sectional illustration.
- the car 28 can be a car of an elevator installation explained in connection with FIG.
- a roller carrier 62 is arranged on the car 28.
- the roller carrier 62 is designed to be electrically conductive and is connected to the elevator car 28 in an electrically conductive manner.
- the roller carrier 62 comprises a pressing device 88 with a bearing 90, in particular a ball bearing.
- a shaft 84 is rotatably received by the bearing 90.
- a first roller 54 designed as a grounding roller is arranged on the shaft 84, the shaft 84 and the roller 54 being designed to be electrically conductive.
- the roller 54 is in contact with a grounded guide rail 52.
- the pressing device 88 which can in particular comprise a spring-damper combination, presses the shaft 84 in the direction of the guide rail 52, so that the roller 54 is pressed against the guide rail 52 and also remains in constant contact with the guide rail 52 when the car 28 is moved.
- the force with which the roller 54 is pressed by the pressing device 88 against the guide rail 52 is set so that, on the one hand, there is a permanent electrically conductive connection between the guide rail 52 and the grounding roller 54 and, on the other hand, the grounding roller is not mechanically stressed too much by unnecessarily high forces becomes.
- the shaft 84 further comprises a sliding contact 80 designed as a slip ring.
- An electrically conductive contact with the elevator car 28 is established via a multi-strand cable as the contact element 82.
- the sliding contact 80 ensures a low-wear and low-resistance transition between car 28 and shaft 84 or grounding roller 54.
- the multi-strand cable also advantageously compensates for the relative movement of shaft 84 to roller carrier 62 or to car 28 that occurs when moving car 28 or different electrical potentials between the car 28 and the grounded guide rail 52 are compensated via the contact element 82, the sliding contact 80, the shaft 84 and the grounding roller 54. So that a potential equalization or a current flow always takes place via the sliding contact 80 on the rotating part of the grounding structure, the bearing 90 is electrically isolated from the roller carrier 62 by means of insulators 86.
Landscapes
- Elimination Of Static Electricity (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019201783.5A DE102019201783A1 (de) | 2019-02-12 | 2019-02-12 | Aufzuganlage mit Kabinenerdung |
| PCT/EP2020/053546 WO2020165217A1 (de) | 2019-02-12 | 2020-02-12 | Aufzuganlage mit kabinenerdung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3924283A1 true EP3924283A1 (de) | 2021-12-22 |
| EP3924283B1 EP3924283B1 (de) | 2023-11-08 |
Family
ID=69582107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20705164.0A Active EP3924283B1 (de) | 2019-02-12 | 2020-02-12 | Aufzuganlage mit kabinenerdung |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3924283B1 (de) |
| CN (1) | CN113767060B (de) |
| DE (1) | DE102019201783A1 (de) |
| FI (1) | FI3924283T3 (de) |
| WO (1) | WO2020165217A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11870269B2 (en) * | 2020-05-26 | 2024-01-09 | Drexel University | Dynamic capacitative power transfer system for a tracked vehicle |
| US20220177262A1 (en) * | 2020-12-04 | 2022-06-09 | Otis Elevator Company | Ropeless elevator intelligent normal force release supervisory control |
| CN117262962A (zh) * | 2023-10-07 | 2023-12-22 | 枣庄矿业(集团)有限责任公司蒋庄煤矿 | 一种塔式摩擦提升机罐道放电装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626954C1 (en) * | 1986-08-08 | 1987-10-15 | Tente Rollen Gmbh & Co | Castor |
| JPH0648672A (ja) * | 1991-10-28 | 1994-02-22 | Toshiba Corp | エレベータ |
| JP4097848B2 (ja) * | 1999-07-06 | 2008-06-11 | 東芝エレベータ株式会社 | エレベータ案内装置 |
| CN201323697Y (zh) * | 2008-12-29 | 2009-10-07 | 浙江联合电梯有限公司 | 一种自动扶梯扶手带消除静电装置 |
| ES2773993T3 (es) * | 2016-03-23 | 2020-07-16 | Inventio Ag | Instalación de ascensor con medios de soporte de carga parcialmente rodeados por una carcasa conductora de electricidad, en particular en una disposición de rodillos de desviación |
| JP6554451B2 (ja) * | 2016-09-30 | 2019-07-31 | 株式会社日立製作所 | テールコードレスエレベーター |
| DE102016223913A1 (de) * | 2016-12-01 | 2018-06-07 | Thyssenkrupp Ag | Aufzuganlage mit einer Stromschiene und einem Stromabnehmer |
| DE102017113562A1 (de) * | 2017-06-20 | 2018-12-20 | Thyssenkrupp Ag | Fahrkorb mit Rollenführung für ein Aufzugssystem |
-
2019
- 2019-02-12 DE DE102019201783.5A patent/DE102019201783A1/de not_active Ceased
-
2020
- 2020-02-12 WO PCT/EP2020/053546 patent/WO2020165217A1/de not_active Ceased
- 2020-02-12 FI FIEP20705164.0T patent/FI3924283T3/fi active
- 2020-02-12 EP EP20705164.0A patent/EP3924283B1/de active Active
- 2020-02-12 CN CN202080013504.0A patent/CN113767060B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113767060A (zh) | 2021-12-07 |
| FI3924283T3 (fi) | 2024-02-06 |
| CN113767060B (zh) | 2023-06-20 |
| EP3924283B1 (de) | 2023-11-08 |
| DE102019201783A1 (de) | 2020-08-13 |
| WO2020165217A1 (de) | 2020-08-20 |
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