WO1999043599A1 - Systeme d'ascenseur a mecanisme d'entrainement de tambour utilisant une courroie plate - Google Patents

Systeme d'ascenseur a mecanisme d'entrainement de tambour utilisant une courroie plate Download PDF

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Publication number
WO1999043599A1
WO1999043599A1 PCT/US1999/003650 US9903650W WO9943599A1 WO 1999043599 A1 WO1999043599 A1 WO 1999043599A1 US 9903650 W US9903650 W US 9903650W WO 9943599 A1 WO9943599 A1 WO 9943599A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
elevator
belt
elevator car
car
Prior art date
Application number
PCT/US1999/003650
Other languages
English (en)
Inventor
David Wayne Jones
Yuji Kanzaki
Tadaaki Nabetani
Toshimitsu Mori
Shusaku Shibasaki
Yasuhisa Shioda
Hiroaki Tateno
Original Assignee
Otis Elevator Company
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
Priority claimed from US09/031,108 external-priority patent/US6401871B2/en
Application filed by Otis Elevator Company filed Critical Otis Elevator Company
Priority to EP99909521A priority Critical patent/EP1042211A1/fr
Publication of WO1999043599A1 publication Critical patent/WO1999043599A1/fr

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
    • B66B11/0065—Roping
    • B66B11/0075—Roping with hoisting rope or cable positively attached to a winding drum

Definitions

  • the present invention relates to elevator systems and, more particularly, to a drum drive elevator system that requires minimal installation and operation space and that eliminates the potential of inadvertently driving past the top terminal.
  • drum drive elevator systems typically involve "cotton reel” type drum and lifting rope arrangements where the rope is wound onto the drum with successive turns such that each length of rope is placed adjacent to the prior length to form a single layer of wound rope.
  • Such systems are usually limited to single layer rope winding because of safety and rope life considerations.
  • the length of the drum required to accommodate single layer rope winding becomes impractical. Because of the length of the drum in such instances, large variations in the rope path occur as the rope is wound along the drum. This may cause difficulty in the placement of guidance sheaves and may result in changing direction offerees imposed on the elevator car thereby affecting ride quality.
  • drum and traction elevator systems usually require a large machine room to accommodate the overhead machine and components, including safety features. It is desirable to eliminate the need for a large machine room and its associated costs and building structure requirements. OBJECTS AND SUMMARY OF THE INVENTION It is an object of the present invention to provide a drum elevator system that requires minimal machine room space. It is a further object to provide a drum elevator system that has inherent safety features to eliminate the potential of driving through the top terminal.
  • the present invention elevator system utilizes a drum and rope system that allows multiple layers of rope winding around the drum.
  • the arrangement eliminates the problems described above associated with rope path variation and ride quality, while increasing the practical limit for rise height.
  • the present invention elevator system also ensures that the lifting force on the elevator car is reduced to zero at a short distance past the upper terminal level, thereby eliminating the over-rise problem described above.
  • This loss of lifting force is inherently controlled by the sizing and spatial arrangement of the drum, car sheaves, a diverter sheave and the fixed hitch point of the belt.
  • the vertical positions of the drum and the fixed hitch point define the limit of the highest achievable vertical position of the elevator car. This feature eliminates the need for speed limiting or other safety features.
  • the present invention elevator system requires only a small machine room that can be located on the top terminal floor, avoiding the need for a separate structure and special building requirements. There is no requirement for hoistway space to accommodate a counterweight, as is required with conventional traction systems.
  • an elevator system utilizes a single drum drive positioned at the bottom of the hoistway, or in the hoistway pit, and is adapted to simultaneously wind two traction belts.
  • Each traction belt is attached to and supports one side of the elevator car.
  • One end of each belt is attached to the elevator car, and the other end of each belt is attached to the drive drum for selective winding to retract or release belt length, thereby controlling vertical movement of the elevator car.
  • the positioning of the drum drive in the pit eliminates the need for a machine room or external structure for mounting the drive, while allowing sufficient space for the double-wound drum when the elevator car is in a raised position.
  • FIG. 1 is a partial, schematic, side cross-sectional view of an elevator system according to the present invention, showing the elevator car near a top position.
  • Fig. 2 is a view as shown in Fig. 1, in which an elevator car is at the absolute top position.
  • Fig. 3 is a partial, schematic side view of an elevator car assembly according to the present invention.
  • Fig. 4 is a partial, schematic perspective view of an elevator car assembly according to Fig. 3.
  • Fig. 5 is a partial, schematic perspective view of an elevator system of according to a second embodiment of the present invention.
  • FIG. 5a is an enlarged, fragmentary view of the drive drum.
  • FIG. 6 is a sectional view of one of the flat ropes.
  • the present invention elevator system (10) includes a drum drive assembly (12), a diverter sheave (14), a belt (16), and an elevator car (18) having two underside sheaves (20, 22).
  • the elevator car (18) and associated sheaves (20, 22) are positioned for vertical movement within a hoistway (24).
  • the belt (16) is fixed at one end to a first hoistway wall (26).
  • the other end of the belt (16) passes through an opening (28) in a second hoistway wall (30) and engages a drum (32) component of the drum drive (12) in a wrap-around fashion.
  • the diverter sheave (14) is mounted in the second hoistway wall (30).
  • the drum drive assembly (12) is mounted on a base (34) that is fixed relative to the hoistway.
  • the assembly (12) includes a conventional motor (not shown) and a drum (32) adapted to selectively rotate in either direction.
  • the belt (16) preferably a flat belt or flat rope, is wound successively around the drum (32).
  • the terms "flat ropes” or “flat belts” as used herein refer to ropes or belts having an aspect ratio greater than one, where the aspect ratio is defined as the ratio of the rope or belt width to thickness.
  • 3 should be sufficiently thin to enable successive winding around the drum so that a rope or belt of sufficient length to enable a desired range of lift height can be used.
  • Conventional controls are used to activate and direct power to the motor which, in turn, imparts torque to cause the drum (32) to rotate thereby winding or unwinding the belt (16).
  • the elevator car (18) can be lowered from the raised position shown in Fig. 1 by activating the motor to turn the drum (32) counterclockwise to unwind the belt (16) from the drum (32).
  • the belt (16) is let out over the diverter sheave (14) and underneath the two car-mounted sheaves (20, 22)
  • the force of gravity acting on the elevator car (18) forces the car (18) to move downward while being supported by the belt (16).
  • Conventional guide or track means (not shown) are used to guide the car movement as it descends or ascends.
  • the first end of the belt (16) remains fixed to the first hoistway wall (26).
  • the drum (32) is stopped. In order to raise the elevator car (18), the same procedure is followed with the drum (32) being caused to rotate in the opposite direction.
  • a safety feature of the present invention for preventing the elevator car (18) from overrunning or from rising higher than the upper terminal is dependent upon the sizing and positioning of the fixed end of the belt (16) and the drum (32). While the preferred embodiment is directed to a drum drive, it is possible to implement the presently described features in a system using a traction drive.
  • the elevator car (18) can be driven only up to a point where the bottoms of the car sheaves (20, 22) are level with a plane connecting the top of the diverter sheave (14) and the fixed point of the belt (16). Even with infinite tension on the belt (16) the elevator car (18) cannot travel above this point.
  • the diameter and placement of the diverter sheave (14), the diameter and placement of the car sheaves (20, 22), and the position of the fixed belt (16) point limit the vertically upward travel of the elevator car (18).
  • the car sheaves (20, 22) are offset with respect to vertical height for the reasons explained below. As the elevator car (18) travels upward, the center of the first car sheave (20) passes the center of the diverter sheave (14). As a result, the tension necessary to maintain upward travel increases, as the load of the car (18) formerly supported by the first car sheave (20) is transferred to the second car sheave (22).
  • the rate of deceleration of the elevator car (18) is controlled by the diameter and placement of the diverter sheave (14), the diameter and placement of the car sheaves (20, 22), and the placement of the fixed hitch point of the belt (16).
  • the arrangement of components of the present invention elevator system (10) imposes minimal requirements on the building structure. All vertical forces are supported by the hoistway (24). Horizontal forces from belt tension are supported by the top terminal floor. No special machine or hitch beams are required. The total mass that needs to be transported to, installed in and supported by the building structure is less than half of that associated with a conventional traction elevator system. Only minimal top overrun clearance is necessary, and no overhead machine room is needed.
  • the present invention elevator system can be used in a smaller hoistway space than a traction system that requires room for a counterweight.
  • the car (18) may be made with a single entrance or with double entrances.
  • the vertical frame members (40, 42) may be provided with conventional safety and guide components (not shown).
  • the vertical frame members (40, 42) are limited in height so as to not extend above the top of the car (18).
  • the car walls (44, 46), floor (48), and roof are formed from a thin structural material, such as an aluminum sandwich panel, to enable them to be self-supporting. Such construction enables minimum wall thickness with maximum floor area.
  • the drum drive assembly (12) is located on the top floor at the side of the hoistway (24) or in a small machine room (not shown) at the same level as the top floor.
  • the diverter sheave (14) is positioned in an opening (28) in the wall (30) enabling the diverter sheave (14) to extend slightly into the hoistway (24).
  • the diverter sheave (14) is positioned as closely as possible to the floor level to minimize overrun distance.
  • the hitch point for the end of the belt (16) is on the wall (26) opposite the drum drive assembly (12).
  • the hitch point is located vertically so that, when the elevator car (18) is at the top floor level, a substantially straight line can be drawn through points connecting the top of the diverter sheave (14), the bottom of each car sheave (20, 22), and the hitch point. This is the maximum vertical position attainable by the car (18).
  • the drum drive assembly (12) is preferably a single unit including a motor, a gearbox, a brake, a drum, a diverter pulley, a drive, a controller and a governor. While the preferred embodiment utilizes a diverter sheave (14) and two car sheaves (20, 22), it is possible to implement a system within the scope of the present invention in which no diverter sheave is used and in which a different number of car sheaves such as, for example, one sheave is used or in which no car sheaves are used.
  • the position of the car sheave or sheaves on the elevator car is not necessarily limited to the bottom of the elevator car and may be, for example, on the top of the elevator car.
  • a second embodiment of the present invention is directed to the elevator system (200) shown in Fig. 5.
  • the system (200) includes a hoistway (202), an elevator car (204), a drive assembly (206) including a drive drum (208) located at the bottom (210) or in the pit of the hoistway (202), a pair of drive belts (212, 214) , a pair of counterweights (216, 218) attached to the drive belts (212, 214), a pair of suspension sheaves (220, 222), and two sets of diverter pulleys (224, 226).
  • the drive drum (208) receives both belts (212, 214) simultaneously so that they wrap and unwrap over each other.
  • the two belts (212, 214) are easily synchronized and the space required for the drive assembly (206) is minimal.
  • the drum (208) below in the hoistway (202), there is sufficient space to accommodate the increased diameter of the drum (208) when the belts (212, 214) are fully wound and the elevator car (204) is in the fully raised position.
  • the diverter pulleys (224, 226) maintain the necessary positioning of the belts (212, 214) to enable simultaneous winding around the same drum (208).
  • a principal feature of the present invention is the flatness of the ropes used in the above described elevator system.
  • the increase in aspect ratio results in a rope that has an engagement surface, defined by the width dimension "w", that is optimized to distribute the rope pressure. Therefore, the maximum rope pressure is minimized within the rope.
  • the thickness "tl"of the flat rope may be reduced while maintaining a constant cross-sectional area of the portions of the rope supporting the tension load in the rope.
  • the flat ropes 722 include a plurality of individual load carrying cords 726 encased within a common layer of coating 728.
  • the coating layer 728 separates the individual cords 726 and defines an engagement surface 730.
  • the load carrying cords 726 may be formed from a high-strength, lightweight non-metallic material, such as aramid fibers, or may be formed from a metallic material, such as thin, high-carbon steel fibers. It is desirable to maintain the thickness "d" of the cords 726 as small as possible in order to maximize the flexibility and minimize the stress in the cords 726. Steel fibers having such diameter improve the flexibility of the cords and the rope. By incorporating cords having the weight, strength, durability and, in particular, the flexibility characteristics of such materials into the flat ropes, the maximum rope pressure may be maintained within acceptable limits.
  • the coating layer 728 is formed from a polyurethane material, preferably a thermoplastic urethane, that is extruded onto and through the plurality of cords 726 in such a manner that each of the individual cords 726 is restrained against longitudinal movement relative to the other cords 726.
  • a polyurethane material preferably a thermoplastic urethane
  • Other materials may also be used for the coating layer if they are sufficient to meet the required functions of the coating layer: wear, transmission of loads to the cords and resistance to environmental factors.
  • the rope pressure may be distributed more uniformly throughout the rope 722. Because of the incorporation of a plurality of small cords 726 into the flat rope elastomer coating layer 728, the pressure on each cord 726 is significantly diminished over prior art ropes. Cord pressure is decreased at least as n ⁇ ⁇ with n being the number of parallel cords in the flat rope, for a given load and wire cross section. Therefore, the maximum rope pressure in the flat rope is significantly reduced as compared to a conventionally roped elevator having a similar load carrying capacity.

Landscapes

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

Abstract

L'invention concerne un système d'ascenseur (10) comprenant une cabine d'ascenseur (18) supportée pour effectuer un mouvement vertical sur une courroie (16) présentant une extrémité fixée à la cage (26) et l'autre moitié entourant un tambour (32) d'un mécanisme d'entraînement (12) de tambour. Lorsque la courroie (16) est enroulée ou déroulée autour du tambour (32), la cabine (18) d'ascenseur est élevée ou abaissée en conséquence.
PCT/US1999/003650 1998-02-26 1999-02-19 Systeme d'ascenseur a mecanisme d'entrainement de tambour utilisant une courroie plate WO1999043599A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99909521A EP1042211A1 (fr) 1998-02-26 1999-02-19 Systeme d'ascenseur a mecanisme d'entrainement de tambour utilisant une courroie plate

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US09/031,108 US6401871B2 (en) 1998-02-26 1998-02-26 Tension member for an elevator
US09/031,108 1998-02-26
US16367698A 1998-09-30 1998-09-30
US09/163,676 1998-09-30
US09/218,990 1998-12-22
US09/218,990 US6739433B1 (en) 1998-02-26 1998-12-22 Tension member for an elevator

Publications (1)

Publication Number Publication Date
WO1999043599A1 true WO1999043599A1 (fr) 1999-09-02

Family

ID=27363795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/003650 WO1999043599A1 (fr) 1998-02-26 1999-02-19 Systeme d'ascenseur a mecanisme d'entrainement de tambour utilisant une courroie plate

Country Status (2)

Country Link
EP (1) EP1042211A1 (fr)
WO (1) WO1999043599A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364063B1 (en) * 1996-12-30 2002-04-02 Kone Corporation Elevator rope arrangement
GB2383791A (en) * 2001-11-05 2003-07-09 Otis Elevator Co Modernisation of hydraulic elevators
GB2395191A (en) * 2001-11-05 2004-05-19 Otis Elevator Co Traction elevator and retrofitting set therefor
US7367430B2 (en) 2001-11-23 2008-05-06 Inventio Ag Elevator system
WO2012156583A1 (fr) * 2011-05-18 2012-11-22 Kone Corporation Agencement d'ascenseur
WO2013026960A1 (fr) * 2011-08-22 2013-02-28 Kone Corporation Dispositif de contrepoids pour éléments de suspension d'un ascenseur
US9546076B2 (en) 2011-09-15 2017-01-17 Kone Corporation Suspension arrangement and guide shoe arrangement for an elevator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2333120A1 (de) * 1973-06-29 1975-01-23 Rudolf Dr Ing Vogel Treib- und/oder umlenkrollen fuer stahlbaender als traeger von transportmitteln
US3910383A (en) * 1974-04-22 1975-10-07 Vladimir Friedl Manlift
DE2523345A1 (de) * 1974-05-28 1975-12-11 Kone Oy Aufzug
SU1518277A1 (ru) * 1987-05-18 1989-10-30 А.В.Блохин, В.Г.Жаворонков и В.Д.Кожем кин Подъемник
EP0688735A2 (fr) * 1994-06-23 1995-12-27 Kone Oy Machinerie d'ascenseur et son montage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2333120A1 (de) * 1973-06-29 1975-01-23 Rudolf Dr Ing Vogel Treib- und/oder umlenkrollen fuer stahlbaender als traeger von transportmitteln
US3910383A (en) * 1974-04-22 1975-10-07 Vladimir Friedl Manlift
DE2523345A1 (de) * 1974-05-28 1975-12-11 Kone Oy Aufzug
SU1518277A1 (ru) * 1987-05-18 1989-10-30 А.В.Блохин, В.Г.Жаворонков и В.Д.Кожем кин Подъемник
EP0688735A2 (fr) * 1994-06-23 1995-12-27 Kone Oy Machinerie d'ascenseur et son montage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CONTACTOR: "Electric lifts - A Practical Treatise on their Construction Operation and Maintenance", August 1942, GEORGE NEWNES LIMITED, LONDON, XP002103802 *
DATABASE WPI Section PQ Week 9020, Derwent World Patents Index; Class Q38, AN 90-153541, XP002103803 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364063B1 (en) * 1996-12-30 2002-04-02 Kone Corporation Elevator rope arrangement
US6868661B2 (en) 1996-12-30 2005-03-22 Kone Corporation Elevator rope arrangement
GB2383791A (en) * 2001-11-05 2003-07-09 Otis Elevator Co Modernisation of hydraulic elevators
GB2383791B (en) * 2001-11-05 2004-04-21 Otis Elevator Co Modernization of hydraulic elevators
GB2395191A (en) * 2001-11-05 2004-05-19 Otis Elevator Co Traction elevator and retrofitting set therefor
GB2395191B (en) * 2001-11-05 2005-10-19 Otis Elevator Co Traction sheave elevators
US7367430B2 (en) 2001-11-23 2008-05-06 Inventio Ag Elevator system
WO2012156583A1 (fr) * 2011-05-18 2012-11-22 Kone Corporation Agencement d'ascenseur
CN103562112A (zh) * 2011-05-18 2014-02-05 通力股份公司 电梯配置
EP2709939A1 (fr) * 2011-05-18 2014-03-26 Kone Corporation Agencement d'ascenseur
EP2709939A4 (fr) * 2011-05-18 2014-10-08 Kone Corp Agencement d'ascenseur
CN103562112B (zh) * 2011-05-18 2017-02-15 通力股份公司 电梯配置
US9643817B2 (en) 2011-05-18 2017-05-09 Kone Corporation Elevator arrangement
WO2013026960A1 (fr) * 2011-08-22 2013-02-28 Kone Corporation Dispositif de contrepoids pour éléments de suspension d'un ascenseur
US9546076B2 (en) 2011-09-15 2017-01-17 Kone Corporation Suspension arrangement and guide shoe arrangement for an elevator

Also Published As

Publication number Publication date
EP1042211A1 (fr) 2000-10-11

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