WO2015019357A1 - Ascenseur spécial shabbat - Google Patents

Ascenseur spécial shabbat Download PDF

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Publication number
WO2015019357A1
WO2015019357A1 PCT/IL2014/050716 IL2014050716W WO2015019357A1 WO 2015019357 A1 WO2015019357 A1 WO 2015019357A1 IL 2014050716 W IL2014050716 W IL 2014050716W WO 2015019357 A1 WO2015019357 A1 WO 2015019357A1
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WO
WIPO (PCT)
Prior art keywords
elevator
cabin
elevator cabin
sabbath
descent
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.)
Ceased
Application number
PCT/IL2014/050716
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English (en)
Inventor
Arik YAKUEL
Hilel YAKOVSON
Dvir Brand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2015019357A1 publication Critical patent/WO2015019357A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
    • B66B1/44—Means for stopping the cars, cages, or skips at predetermined levels and for taking account of disturbance factors, e.g. variation of load weight

Definitions

  • the present invention relates to systems and methods for implementing Sabbath Elevators in accordance with Jewish law and, in particular, addresses problems specific to the descent of such an elevator.
  • a Sabbath Lift is problematic, despite all operations being carried out automatically by a timer as described above.
  • the main cause of the problem is a sequence of electrical operations carried out in the course of the lift's ascent and descent. Even though the lift ascends and descends automatically, stopping at each floor, without the passengers having to press the electrical operating buttons— and even in the case of a non-electrically driven lift, such as a hydraulic lift— many of the control operations, which are in fact electrical functions, are nevertheless activated by the lift cabin. And persons using the lift are considered to have had a share in the electrical operations on account of their body weight.
  • This prohibition on closure of an electrical circuit on the Sabbath also applies to passive closure of the circuit by the presence of a person's body, for example through his body weight— not necessarily by manual closure of the circuit.
  • the prohibition is also in force when the action (circuit closure) is performed simultaneously by more than a single individual, or when the person is a passive accomplice to other persons or objects in the circuit closure operation.
  • Such would be the case for example with a person occupying a descending lift cabin that operates electrical switches on its way down (these switches serve as monitoring devices and are located at each floor; they provide a clear indication of the exact location of the lift cabin at any given instant, as well as enabling the door to be opened at precisely the right position in line with the lift shaft opening, so that passengers can exit and enter the lift in safety).
  • the lift cabin On its way down, the lift cabin operates electrical switches that cause it to slow down and stop at predetermined points corresponding to the lift shaft openings, so as to ensure safe opening of the lift cabin doors.
  • other operations may replace switch operation for establishing the lift cabin position, which are also forbidden on the Sabbath.
  • the present invention provides systems and methods for implementing Sabbath Elevators in accordance with Jewish law and, in particular, addresses problems specific to the descent of such an elevator.
  • a Sabbath elevator comprising: (a) an elevator cabin displaceable along an elevator shaft between a plurality of levels; (b) a drive system for displacing the elevator cabin upwards and downwards along the elevator shaft; (c) a plurality of electrically operated sensors deployed to detect correct alignment of the elevator cabin at each of the levels; and (d) a controller associated with the drive system and the electrically operated sensors, the controller including control circuitry configured to: (i) actuate the drive system to displace the elevator cabin downwards from an upper of the levels towards a lower of the level, (ii) during the descent of the elevator cabin, deactivate the electrically operated sensors and operate a timer, and (iii) at the end of a predefined time period sufficient to complete the descent, reactivate the electrically operated sensors for use in verifying correct alignment of the elevator cabin with the lower level.
  • the drive system is a hydraulic drive system, and wherein the descent is achieved by opening of a hydraulic valve to allow descent of the elevator cabin under gravity.
  • the descent is stopped hydraulically by closure of at least one valve actuated by motion of the elevator cabin on reaching a predefined stopping location.
  • the at least one valve is implemented as at least two valves including a first valve deployed for throttling flow of hydraulic fluid prior to the elevator cabin reaching the predefined stopping location and a second valve deployed for stopping flow of the hydraulic fluid when the elevator cabin reaches the predefined stopping location.
  • the predefined stopping location is below a correct alignment of the elevator cabin with the lower level
  • the controller is further configured to activate the drive system after the predefined time period to displace the elevator cabin upwards from the predefined stopping location to the correct alignment of the elevator cabin as detected by a corresponding one of the electronically operated sensors.
  • the predefined stopping location corresponds to correct alignment of the elevator cabin with the lower level.
  • the controller is configured to actuate the drive system to stop the descent at a given elapsed time after initiating the descent, the given elapsed time being sufficient to allow the elevator cabin to reach a location below a correct alignment of the elevator cabin with the lower level, and wherein the controller is further configured to activate the drive system after the predefined time period to displace the elevator cabin upwards from the predefined stopping location to the correct alignment of the elevator cabin as detected by a corresponding one of the electronically operated sensors.
  • a Sabbath elevator comprising: (a) an elevator cabin displaceable along an elevator shaft between a plurality of levels; (b) a drive system for displacing the elevator cabin upwards and downwards along the elevator shaft; (c) a non-electric weighing mechanism deployed to support at least a part of the elevator cabin so as to receive the weight of occupants of the elevator cabin; and (d) a braking subsystem associated with the elevator cabin, the braking subsystem being linked to the weighing mechanism so as to be actuated by a weight of occupants of the elevator cabin to selectively brake a speed of descent of the elevator cabin sufficiently to prevent an increase in the speed of descent due to the weight of the occupants.
  • the braking system includes: (a) a hydraulic pump mounted on the elevator cabin having a gear engaged with a timing chain or toothed rack extending along the elevator shaft; and (b) a flow limiting valve deployed in a fluid flow circuit with the hydraulic pump and arranged such that the weight of the occupants of the elevator cabin acts on the flow-limiting valve, thereby actuating the flow-limiting valve to limit fluid flow through the hydraulic pump.
  • the braking system is configured to provide a continuously variable braking effect varying as a continuous function of the weight of occupants of the elevator cabin. According to a further feature of an embodiment of the present invention, the braking system is configured to switch between a minimum-braking state and a maximum-braking state in response to a weight of occupants above a given value.
  • the braking subsystem is configured to selectively brake a speed of descent of the elevator cabin sufficiently to decrease the speed of descent as a function of increasing weight of the occupants.
  • the at least a part of the elevator cabin supported by the weighing mechanism comprises a suspended floor of the elevator cabin deployed for receiving the weight of occupants of the elevator cabin.
  • FIG. 1 is a schematic isometric illustration of a Shabbat elevator, constructed and operative according to an embodiment of a first aspect of the present invention
  • FIG. 2 is a schematic isometric cut-away view of an elevator cabin according to an embodiment of a further aspect of the present invention
  • FIG. 3 is a schematic isometric view of a hydraulic pump for use in a braking system of the second aspect of the present invention
  • FIG. 4 is a schematic isometric view of an elevator cabin according to a variant embodiment of the present invention.
  • FIG. 5 is an enlarged view of the region of FIG. 4 designated "V";
  • FIG. 6 is an additional partial isometric view of the elevator cabin of FIG. 4. DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the present invention provides systems and methods for implementing Sabbath Elevators in accordance with Jewish law and, in particular, addresses problems specific to the descent of such an elevator.
  • Figure 1 shows schematically a Sabbath elevator, generally designated 10, constructed and operative according to a certain embodiment of a first aspect of the present invention.
  • Sabbath elevator 10 includes an elevator cabin 12 displaceable along an elevator shaft 14 between a plurality of levels, here shown as a lower level 16 and an upper level 18.
  • a drive system is provided for displacing elevator cabin 12 upwards and downwards along elevator shaft 14.
  • the drive system includes a hydraulic cylinder 20 driven via fluid pressure from a pump 22 which directs fluid from a reservoir 24 via an arrangement of valves or "valve block" 26.
  • a hydraulic cylinder 20 driven via fluid pressure from a pump 22 which directs fluid from a reservoir 24 via an arrangement of valves or "valve block" 26.
  • Vaper block As will be discussed below, various aspects of the invention apply equally to a range of other hydraulic and non-hydraulic elevator designs.
  • Sabbath elevator 10 further includes a plurality of electrically operated sensors 28 deployed to detect correct alignment of elevator cabin 12 at each of levels 16 and 18.
  • a controller 30, associated with the drive system and with electrically operated sensors 28, includes control circuitry (either dedicated logic circuitry or a general purpose processing system with one or more processors executing suitable software) configured to:
  • Deactivation of electrically operated sensors 28 is typically achieved by interrupting a supply of electrical power to those sensors, although it could equally be achieved by any other electrical or mechanical intervention that disables their sensing operation.
  • the drive system is a hydraulic drive system, which may employ a hydraulic cylinder located under the cabin as shown, a side-mounted hydraulic cylinder with a pulley and cable mechanism for an increased cabin motion for a given cylinder length, or a hydraulic motor-driven pulley system.
  • descent of the cabin is preferably achieved by opening of a hydraulic valve to allow descent of the elevator cabin under gravity.
  • stopping of the descent is preferably achieved hydraulically by closure of at least one, and preferably two, valves actuated by mechanical interaction with motion of elevator cabin 12 on reaching a predefined stopping location, without electrical sensing.
  • a first valve is deployed for throttling the flow of hydraulic fluid prior to elevator cabin 12 reaching the predefined stopping location, thereby slowing the cabin, and a second valve is deployed for stopping flow of the hydraulic fluid when the elevator cabin reaches the predefined stopping location.
  • valves may be the valves within valve block 26 which are normally employed for controlling the downward motion of the elevator, or they may be additional dedicated control valves added to the valve block or located elsewhere on a bypass flow line, which allow controlled drainage of hydraulic fluid from cylinder 20 to reservoir 24 while the valve block valves are all closed.
  • Mechanically initiated actuation of the descent-controlling valves is preferably achieved using corresponding mechanical sensors 32 and 34 deployed to be actuated by mechanical interaction with the elevator cabin, or some other mechanically associated component that moves in unison with the elevator cabin.
  • Mechanical sensors 32 and 34 are linked by a non-electric linkage, for example, a mechanical linkage or cable, a hydraulic or pneumatic connection or the like, to the corresponding valves in valve block 26.
  • the hydraulic valves may be integrated with the corresponding sensors 32 and 34 located directly on the bypass flow path.
  • the predefined stopping location is chosen to be below a correct alignment of the elevator cabin with the lower level.
  • controller 30 then activates the drive system after the predefined time period to displace elevator cabin 12 upwards from the predefined stopping location to the correct alignment of the elevator cabin as detected by the corresponding electronically operated sensor 28.
  • the predefined stopping location corresponds to correct alignment of elevator cabin 12 with the lower level.
  • controller instead of employing hydraulic valve actuators 32 and 34, controller relies on timing of the descent, actuating the drive system to stop the descent at a given elapsed time after initiating the descent.
  • the given elapsed time is chosen empirically for the given installation to be sufficient to allow elevator cabin 12 to reach a location below a correct alignment of the elevator cabin with the lower level under the full range of normal operating conditions and loads.
  • Controller 30 then activates the drive system after the predefined time period to displace elevator cabin 12 upwards from the stopping location to the correct alignment of elevator cabin 12 as detected by a corresponding one of the electronically operated sensors 28.
  • the electronically operated sensors 28 can be any suitable sensors including but not limited to mechanical switches, optical sensors and proximity sensors (for example, inductive). In order to avoid concerns that may be raised by closing of an electric circuit even when disabled, there is a preference for non- contact sensors such as optical sensors and proximity sensors. Suitable sensors of all of the above types are widely commercially available, and their manner of deployment is well known in the art.
  • control system Shortly before transmission of the "Descend" command to the lift cabin, the control system performs two operations:
  • closure or opening of the electrical switches in the lift shaft by the lift cabin on its way down is of no significance on the Sabbath, since no current is due to flow through them following their closure by the lift cabin as it passes in their vicinity.
  • the lift cabin having received a "Descend” command, goes down, encounters the switch on its way and closes the circuit; however it does not stop, as the switch has been disconnected from the system, but continues on its way.
  • the switch is reopened.
  • the cabin stops at a point located below (typically by a few centimetres) the point at which the switch would have stopped it to enable the door to be opened.
  • the lift is slowed down prior to stopping and immediately afterwards brought to a complete halt by means of a pair of hydraulic valves.
  • These hydraulic valves are installed in the lift shaft at predetermined positions, as stated, below the stopping point required for opening the door.
  • the valve reduces oil circulation in the system and the lift slows down; a short time later, when the lift cabin reaches the second valve and presses it as well, this valve completely stops oil circulation in the hydraulic system and the lift cabin comes to rest.
  • the lift stops at a point below the opening, so that the door cannot be safely opened at this juncture; and furthermore, the control system has not yet received an electrical signal indicating the location of the lift cabin in line with the door, therefore it will not allow the door to be opened at this stage.
  • the next stage is to enable the lift cabin to reach the shaft opening and the door to be opened:
  • the timer reconnects the electrical switches to the control system, and shortly after that sends an "Ascend" command to the lift cabin.
  • the cabin goes up, encounters the electrical switch on the way up, closes it, and is brought to a halt electrically by the control system exactly opposite the opening.
  • the electrical control system issues an "Open door” command, following which the countdown starts leading to automatic initiation of the next operation— descent or ascent.
  • the lift cabin thus stops at the end of the movement at the preset position in line with the opening, without the occupants being involved in actions forbidden on the Sabbath, as set out above.
  • a proximity switch closes an electrical circuit electronically owing to inductive changes/modification of a magnetic field and the like, operating by means of a pair of components being brought close to each other.
  • One of these components is permanently mounted adjacent to the opening on each floor where the lift calls, and the other is attached to the lift cabin; when the latter is brought near to the permanent component, an electromagnetic/inductive change occurs in the permanent component notifying the control system that the lift cabin has reached the exact position required, and door opening is enabled.
  • the proximity switch has no Halachic significance when isolated from the electrical system, and bringing the components close to each other is not forbidden on the Sabbath.
  • the control system starts a countdown on the timer and disconnects the electrical switches (proximity switches) installed on each floor from the electrical system.
  • the electrical switches proximity switches
  • the lift cabin encounters the first hydraulic valve, which slows it down purely hydraulically, and at the precise position in line with the shaft opening it closes the second hydraulic valve, which stops it at the opening.
  • the system verifies that the lift cabin is located where the door may be opened, upon which a door opening command is transmitted.
  • control system Shortly before transmission of the "Descend" command to the lift cabin, the control system performs two operations:
  • the lift cabin receives a "Descend” command and descends for a period preset by the timer. At the end of the preset time the lift cabin receives a "Halt” command from the operating system and stops. The time is calculated such that the lift cabin stops below the lift shaft opening.
  • the cabin goes up, encounters the electrical switch on the way up, closes it, and is brought to a halt electrically by the control system exactly opposite the opening.
  • the electrical control system issues an "Open door” command, following which the countdown starts, leading to automatic initiation of the next operation.
  • the lift cabin will not be stopped at a precise location as in the previous solutions, on account of variations in the cabin weight due to the passengers' presence as well as other factors such as the hydraulic fluid temperature. This however does not constitute a problem, as the cabin will be raised until it reaches the required position and will be stopped by the electrical switch mounted precisely at the opening.
  • This option is suitable for implementation in a wide range of types of elevator system, including fully electric (non-hydraulic) systems.
  • a single pair of hydraulic valves may be installed, to be operated by cams mounted on a continuous chain.
  • the chain will be attached to the lift cabin, so that the chain and cams move in unison with the cabin, opening and closing the valves when the elevator cabin is located precisely at the required position.
  • a further aspect of the present invention provides a non-electrical weight-compensated braking system which prevents any increase in the speed of descent due to the weight of the cabin occupants.
  • An exemplary implementation of this aspect of the invention is illustrated herein with reference to FIGS. 2-6.
  • This aspect of the present invention is applicable to an elevator cabin 12 displaceable along an elevator shaft with any type of drive system for displacing the elevator cabin upwards and downwards along the elevator shaft, such as, for example, the overall system illustrated in FIG. 1.
  • a non-electric weighing mechanism deployed to support at least a part of the elevator cabin so as to receive the weight of occupants of the elevator cabin
  • a braking subsystem associated with the elevator cabin.
  • the braking subsystem is linked to the weighing mechanism so as to be actuated by a weight of occupants of the elevator cabin to selectively brake a speed of descent of the elevator cabin sufficiently to prevent an increase in the speed of descent due to the weight of the occupants.
  • the weighing mechanism supports a suspended floor 50 of the elevator cabin on which occupants of the elevator cabin stand. Suspended floor 50 hangs from an upper frame 52 which can move vertically relative to the remainder of cabin 12. A spring 54 or the like biases upper frame 52 towards a slightly raised position and provides a load-responsive displacement, thereby serving as the weighing mechanism. A non-electrical linkage uses this displacement to actuate the braking mechanism.
  • the braking mechanism may be any suitable type of braking mechanism, including but not limited to: hydraulic braking mechanism, friction-based braking mechanisms (such as a friction-locking device acting on an elongated cable, as is well known in the field of emergency evacuation descent devices), and simple mechanical friction braking of various guide-wheels or the like engaging surfaces of the elevator shaft.
  • hydraulic braking mechanism friction-based braking mechanisms (such as a friction-locking device acting on an elongated cable, as is well known in the field of emergency evacuation descent devices), and simple mechanical friction braking of various guide-wheels or the like engaging surfaces of the elevator shaft.
  • friction-based braking mechanisms such as a friction-locking device acting on an elongated cable, as is well known in the field of emergency evacuation descent devices
  • simple mechanical friction braking of various guide-wheels or the like engaging surfaces of the elevator shaft By way of one non-limiting particularly preferred example, this aspect of the invention is illustrated herein employing a hydraulic braking arrangement.
  • the braking system is here implemented using a hydraulic pump 56, mounted on elevator cabin 12, having a gear 58 engaged with a timing chain 60 or toothed rack (not shown) extending along the elevator shaft.
  • hydraulic pump is here used synonymously with “hydraulic motor” to refer to a device in which mechanical rotation is interconverted with hydraulic fluid flow. Flow of hydraulic fluid through motor 56 is limited by a flow limiting valve 62 deployed in a fluid flow circuit with the hydraulic pump.
  • Valve 62 is deployed so as to be actuated by displacement of upper frame 52 so that the weight of the occupants of the elevator cabin acts on the flow-limiting valve, thereby actuating the flow-limiting valve to limit fluid flow through the hydraulic pump.
  • a control lever 64 provides the linkage between upper frame 52 and valve 62.
  • a linear bearing and actuator rod 66 pulls downward on an actuator surface of valve 62.
  • valve 62 and the corresponding braking effect of the device, can be selected according to the desired functionality.
  • the braking system is configured to provide a continuously variable braking effect varying as a continuous function of the weight of occupants of the elevator cabin. This is achieved in the exemplary embodiment illustrated here by use of a continuously variable throttling valve.
  • the weighing mechanism, the flow- restricting valve and the linkage between them can be designed to achieve a desired degree of braking as a function of increased weight.
  • the braking subsystem is configured to selectively brake a speed of descent of the elevator cabin sufficiently to actually decrease the speed of descent as a function of increasing load from the weight of the occupants.
  • the braking system is configured to switch between a minimum-braking state (most preferably approaching zero braking) and a maximum-braking state in response to a weight of occupants above a given value. This may be achieved in the illustrated embodiment by using a valve which switches between two well-defined states of minimally-restricted flow and a flow-restricting state.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Types And Forms Of Lifts (AREA)
  • Elevator Control (AREA)

Abstract

L'invention concerne un ascenseur spécial shabbat, comprenant une cabine d'ascenseur pouvant se déplacer le long d'une gaine d'ascenseur entre plusieurs niveaux, et un système d'entraînement servant à déplacer la cabine d'ascenseur vers le haut et vers la bas le long de la gaine d'ascenseur. Un certain nombre de capteurs fonctionnant électriquement sont déployés pour détecter l'alignement correct de la cabine d'ascenseur à chaque niveau. Un dispositif de commande actionne le système d'entraînement afin de déplacer la cabine d'ascenseur vers le bas d'un niveau supérieur vers un niveau inférieur et, durant la descente de la cabine d'ascenseur, désactive les capteurs fonctionnant électriquement tout en faisant fonctionner un minuteur. A la fin d'un laps de temps prédéfini suffisant pour réaliser la descente, le dispositif de commande réactive les capteurs fonctionnant électriquement afin de vérifier l'alignement correct de la cabine d'ascenseur avec le niveau inférieur.
PCT/IL2014/050716 2013-08-07 2014-08-07 Ascenseur spécial shabbat Ceased WO2015019357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361862976P 2013-08-07 2013-08-07
US61/862,976 2013-08-07

Publications (1)

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WO2015019357A1 true WO2015019357A1 (fr) 2015-02-12

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PCT/IL2014/050716 Ceased WO2015019357A1 (fr) 2013-08-07 2014-08-07 Ascenseur spécial shabbat

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020102352A3 (fr) * 2018-11-13 2020-06-18 Charles Greenberg Dispositif de transport alimenté par l'eau municipale pour le shabbat
WO2020178832A1 (fr) * 2019-03-05 2020-09-10 Dan Davidian Système et procédé d'entraînement hydraulique-pneumatique avec stockage d'énergie pour ascenseurs
CN113788388A (zh) * 2021-09-27 2021-12-14 鸿羚鲲鲱(重庆)装配式建筑工程有限公司 一种单井道多台电梯可同时运行的多用途电梯系统
US11498801B2 (en) 2017-10-24 2022-11-15 Shmuel Derbarmdiger Elevator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071116A (en) * 1974-11-12 1978-01-31 Shaare Zedek Hospital Load cancelling device for conveyance systems
IL122745A (en) * 1997-12-25 1998-10-30 Schnaidman Zulmir Load canceling elevator
US7311179B1 (en) * 2004-01-20 2007-12-25 Franklin Samuel H Elevator dampening system
WO2013035060A1 (fr) * 2011-09-11 2013-03-14 G.L. Glat Lift Ltd. Ascenseur de sabbat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071116A (en) * 1974-11-12 1978-01-31 Shaare Zedek Hospital Load cancelling device for conveyance systems
IL122745A (en) * 1997-12-25 1998-10-30 Schnaidman Zulmir Load canceling elevator
US7311179B1 (en) * 2004-01-20 2007-12-25 Franklin Samuel H Elevator dampening system
WO2013035060A1 (fr) * 2011-09-11 2013-03-14 G.L. Glat Lift Ltd. Ascenseur de sabbat

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11498801B2 (en) 2017-10-24 2022-11-15 Shmuel Derbarmdiger Elevator
IL255248B1 (en) * 2017-10-24 2023-05-01 Shmuel Derbarmdiger Elevators
IL255248B2 (en) * 2017-10-24 2023-09-01 Shmuel Derbarmdiger Elevators
WO2020102352A3 (fr) * 2018-11-13 2020-06-18 Charles Greenberg Dispositif de transport alimenté par l'eau municipale pour le shabbat
WO2020178832A1 (fr) * 2019-03-05 2020-09-10 Dan Davidian Système et procédé d'entraînement hydraulique-pneumatique avec stockage d'énergie pour ascenseurs
US20220162038A1 (en) * 2019-03-05 2022-05-26 Dan Davidian System and method for hydraulic-pneumatic drive with energy storage for elevators
CN113788388A (zh) * 2021-09-27 2021-12-14 鸿羚鲲鲱(重庆)装配式建筑工程有限公司 一种单井道多台电梯可同时运行的多用途电梯系统
CN113788388B (zh) * 2021-09-27 2023-02-17 鸿羚鲲鲱(重庆)装配式建筑工程有限公司 一种单井道多台电梯可同时运行的多用途电梯系统

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