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WO1999048791A1 - Systeme d'ascenseur - Google Patents

Systeme d'ascenseur Download PDF

Info

Publication number
WO1999048791A1
WO1999048791A1 PCT/AU1999/000205 AU9900205W WO9948791A1 WO 1999048791 A1 WO1999048791 A1 WO 1999048791A1 AU 9900205 W AU9900205 W AU 9900205W WO 9948791 A1 WO9948791 A1 WO 9948791A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
drive
cable
drive unit
sheave
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/AU1999/000205
Other languages
English (en)
Inventor
Warren Bruce Watt
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.)
Eastern Elevators Pty Ltd
Original Assignee
Eastern Elevators Pty Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eastern Elevators Pty Ltd filed Critical Eastern Elevators Pty Ltd
Priority to NZ507529A priority Critical patent/NZ507529A/en
Priority to AU30191/99A priority patent/AU736244B2/en
Publication of WO1999048791A1 publication Critical patent/WO1999048791A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065—Roping
    • B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave

Definitions

  • the present invention relates to an elevator system.
  • a known form of elevator system comprises a lift car supported in an elevator shaft by a cable arrangement which couples the car to a counterweight via a drive unit.
  • the drive unit comprises a motor and a drive sheave/wheel located in a wheel house directly over the top of the elevator shaft.
  • the wheel house In order for the lift to service all floors of a building, the wheel house must necessarily be provided above the top floor which may result in disadvantages, such as sacrifice of an additional floor in a building due to height restrictions.
  • Another known arrangement is for the drive assembly to be recessed in a side wall of the shaft, adjacent the top floor.
  • the cable is in a sling-type configuration in which the cable extends from an opposite side of the shaft, adjacent the top thereof, under the car and back up to the drive assembly.
  • a disadvantage of such an arrangement is that the motor of the drive assembly is required to work at twice the conventional rate due to a 2: 1 ratio of cable length needed for moving the car over a given distance, as compared to a conventional arrangement.
  • an elevator system including: a lift car arranged in an elevator shaft; - a drive unit; a diverting wheel positioned remote from the drive unit; a counterweight; and a cable assembly coupling the car to the counterweight, the cable assembly extending from the car to the diverting wheel via the drive unit and from the diverting wheel to the counterweight.
  • the diverting wheel forms part of a wheel assembly which further includes a second wheel about which the cable between the car and the drive unit passes.
  • the drive unit includes a drive sheave for applying traction drive to the cable and a diverting wheel arranged to direct the cable from the drive sheave back to a third wheel of the wheel assembly and subsequently about the diverting wheel of the wheel assembly for coupling with the counterweight.
  • the drive unit includes a motor with a drive shaft arranged co-axially with the drive sheave.
  • the drive shaft, the drive sheave and the diverting wheel of the drive unit have axes of rotation substantially perpendicular to axes of rotation of the wheels of the wheel assembly.
  • the lift car is cantilevered, with rollers provided on one side thereof for rolling movement along guide rails extending lengthwise of the elevator shaft.
  • a drive unit for use in the above described elevator system, including a drive sheave, a diverting wheel and a motor with a drive shaft coupled to the sheave in substantially co-axial relation.
  • the drive sheave is adapted to receive a cable from a first direction about a circumference thereof for driving engagement with the cable and the diverting wheel is arranged with an axis of rotation substantially parallel to the sheave and laterally offset therefrom to allow the cable from the drive sheave to pass from an outer circumference of the diverting wheel in a second direction, substantially parallel and in spaced relation with respect to the first direction.
  • Figure 1 is a diagrammatic perspective view of an elevator system
  • Figure 2 is a perspective view of a wheel assembly used with the system in Figure 1 ;
  • Figure 3 is a schematic view showing the wheel and sheave arrangement utilised in the system of Figure 1.
  • Figure 4 illustrates a preferred form of drive unit with the arrangement of Figure 3;
  • FIG. 5 illustrates an alternative form of drive unit to that shown in Figure 4.
  • the system includes a cantilevered lift car 2 provided with rollers 3 at one side thereof for rolling movement along guide rails 4, which extend lengthwise of a lift shaft 5.
  • the shaft 5 traverses a number of floors 6 and, at a lower level 7, a drive unit 8 is provided for driving the lift car up and down the shaft.
  • the cable assembly 9 couples the lift 2 to a counterweight 10 which travels up and down the shaft, between the guide rails 4.
  • the cable assembly 9 preferably includes a plurality of ropes, say four, for security, however, only one such rope is shown in the Figures, for simplicity of description.
  • Each of the ropes follow a parallel path which extends from the lift car 2 up to a wheel assembly 12 (see figure 2), which is secured at the top 11 of the guide rails 4, down to the drive unit 8 for subsequent coupling to the counterweight via a diverting wheel 13 of the wheel assembly 12.
  • the wheel assembly is shown in detail in Figure 2, as including a bracket 14 for mounting between the guide rails 4 and two axles 15, 16 extending between opposite sides 14, 18 of the bracket.
  • a lower most one 16 of the axles supports wheels 17,17' about which the ropes to the drive unit 8 are passed.
  • the other axle 15 supports the diverting wheel 13 which allows cable 20 from the drive unit 8 to pass over the wheel 17' , about the circumference of the diverting wheel 13 for connection to the counterweight 10.
  • the specific cable assembly 9 can be seen more clearly from Figure 3 in which a first portion 21 of the cable 20 connects directly to the car 2 and passes over the wheel 17 of the wheel assembly 12.
  • the cable continues, via a second portion 23, in a first direction down to the drive unit 8.
  • the drive unit includes a main drive sheave 25 for traction driving of the cable 20.
  • the sheave 25 is arranged below and in front of a diverting wheel 26. Both the sheave 25 and the wheel 26 have substantially parallel axes of rotation arranged perpendicularly to the axes of rotation of the wheels 13, 17, 17' of the wheel assembly.
  • the laterally offset configuration of the sheave and diverting wheel allows the cable to extend around the drive sheave to the diverting wheel and to pass from an outer circumference of the diverting wheel in a second direction, back toward the wheel assembly 12.
  • the cable along the second direction is in the form of a third cable portion which passes in close, spaced relation with respect to the cable passing directly between the wheel 17 and the drive sheave 25, in the first direction.
  • the cable then passes over the wheel 17' and onto the diverting wheel 13 of the assembly 12 to a fourth portion 24 which extends down to couple with the counterweight 10.
  • the provision of the diverting wheel 26 and the arrangement of the associated diverting wheel 13, in combination with wheel 17' allows the cable portions 22, 23 to run in a substantially adjacent parallel manner such that the operational space requirements of the cable within the lift shaft itself is minimised.
  • the counterweight 10 is preferably filled with lead which allows the dimensions of the weight to be reduced in comparison with conventional counterweights to provide an overall compact assembly which is capable of fitting between the guide rails 4.
  • a counterweight buffer 27 is provided in the bottom 28 of the shaft 5 for shock absorption if the counterweight, for some reason, is freed from the cable connection to the lift car.
  • a similar buffer 29 is provided for the lift car 2 itself in case various safety measures fail.
  • Once such primary safety measure is provided in the form of a speed governor (not shown) which ensures the speed of cable passing through the drive unit 8 is maintained below a predetermined level. An overspeed scenario will activate an electrical safety.
  • a secondary safety measure is the application of a mechanical safety device. In conjunction with this mechanical device a set of safety gear shoes is used to jam against the guide rails if the car overspeeds during normal operation, or if the lifting cable were to break free and cause an overspeed.
  • the drive unit may be recessed in a basement or lower level 7 of a building whilst still being able to adequately drive a lift car up and down the guide rails 4 without the need for a 2: 1 drive ratio or excess weight on the car itself.
  • This allows the system to have a top speed of 2.0 m/s, a capacity to carry loads up to 1632 kg to heights of 52 metres.
  • the system itself may also be installed in a building without the need for a separate wheel house.
  • the drive unit 8 is still somewhat space consuming, such that a separate engine room may be required.
  • the invention therefore also provides a drive unit 30 where a motor 31 is arranged co-axially with the drive sheave 25, as shown in Figure 4.
  • a drive shaft of the motor may thereby be coupled to the sheave 25 via a planetary gear mechanism (not shown) which can increase the unit's efficiency, as compared to a conventional worm-gear mechanism, such as used with the unit 8 shown in Figure 3.
  • a planetary gear mechanism (not shown) which can increase the unit's efficiency, as compared to a conventional worm-gear mechanism, such as used with the unit 8 shown in Figure 3.
  • unit 30 can also be configured to fit snugly in a wall cavity, represented by reference numeral 32, directly adjacent and between the guide rails 4 so that the need for a large engine room is obviated and the unit 30 can instead be fitted in a services cupboard sized space.
  • unit 33 An alternative form of unit 33 is shown in Figure 5, again with a co-axially arranged motor 34.
  • the drive sheave 25 is, however, of reduced diameter and an additional pulley 35 is used to maintain the same effective cable orientation leading to and from the unit 33, as with the embodiments shown in Figures 1 to 4.
  • the unit 33 also includes a bracket 36 for mounting the unit to a wall or other like structure as opposed to the previously described floor mounted units 8, 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un système d'ascenseur (1) comportant une cabine d'ascenseur (2) placée dans une gaine d'ascenseur (5), une unité de commande (8), une roue de déviation (13) éloignée de l'unité de commande, un contrepoids (10) et un ensemble câble (9) reliant la cabine au contrepoids. Cet ensemble câble s'étend de la cabine à la roue de déviation, en passant par l'unité de commande, et de la roue de déviation au contrepoids.
PCT/AU1999/000205 1998-03-24 1999-03-24 Systeme d'ascenseur Ceased WO1999048791A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NZ507529A NZ507529A (en) 1998-03-24 1999-03-24 Elevator system
AU30191/99A AU736244B2 (en) 1998-03-24 1999-03-24 Elevator system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP2555A AUPP255598A0 (en) 1998-03-24 1998-03-24 Drive arrangement
AUPP2555 1998-03-24

Publications (1)

Publication Number Publication Date
WO1999048791A1 true WO1999048791A1 (fr) 1999-09-30

Family

ID=3806816

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/000205 Ceased WO1999048791A1 (fr) 1998-03-24 1999-03-24 Systeme d'ascenseur

Country Status (3)

Country Link
AU (1) AUPP255598A0 (fr)
NZ (1) NZ507529A (fr)
WO (1) WO1999048791A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048020A1 (fr) * 2001-12-04 2003-06-12 Hillston Finance Limited Ascenseur a poulie d'entrainement sans local de machinerie
CN101734535B (zh) * 2008-11-05 2014-01-01 东芝电梯株式会社 电梯系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB616357A (en) * 1944-04-13 1949-01-20 Stigler Liften C V Improvements in or relating to electric elevators
EP0539238A2 (fr) * 1991-10-25 1993-04-28 Otis Elevator Company Méthode d'arrangement des câbles d'un ascenseur
EP0578237A1 (fr) * 1992-07-07 1994-01-12 KONE Elevator GmbH Ascenseur à poulie de traction
WO1997011020A1 (fr) * 1995-09-21 1997-03-27 Kone Oy Ascenseur a poulie tractante sans compartiment machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB616357A (en) * 1944-04-13 1949-01-20 Stigler Liften C V Improvements in or relating to electric elevators
EP0539238A2 (fr) * 1991-10-25 1993-04-28 Otis Elevator Company Méthode d'arrangement des câbles d'un ascenseur
EP0578237A1 (fr) * 1992-07-07 1994-01-12 KONE Elevator GmbH Ascenseur à poulie de traction
WO1997011020A1 (fr) * 1995-09-21 1997-03-27 Kone Oy Ascenseur a poulie tractante sans compartiment machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048020A1 (fr) * 2001-12-04 2003-06-12 Hillston Finance Limited Ascenseur a poulie d'entrainement sans local de machinerie
EA005334B1 (ru) * 2001-12-04 2005-02-24 Хиллстон Файненс Лимитед Лифт с тяговым шкивом без машинного отделения
US7364019B2 (en) 2001-12-04 2008-04-29 Hillston Finance Limited C/O Aleman, Cordero, Galindo & Lee Trust (Bvi) Limited Machine-room-less traction sheave elevator
CN101734535B (zh) * 2008-11-05 2014-01-01 东芝电梯株式会社 电梯系统

Also Published As

Publication number Publication date
NZ507529A (en) 2002-03-28
AUPP255598A0 (en) 1998-04-23

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