EP1702877B1 - Elevator system - Google Patents

Elevator system Download PDF

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Publication number
EP1702877B1
EP1702877B1 EP20060002852 EP06002852A EP1702877B1 EP 1702877 B1 EP1702877 B1 EP 1702877B1 EP 20060002852 EP20060002852 EP 20060002852 EP 06002852 A EP06002852 A EP 06002852A EP 1702877 B1 EP1702877 B1 EP 1702877B1
Authority
EP
European Patent Office
Prior art keywords
car
rope
hoist
elevator system
pulley
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.)
Expired - Fee Related
Application number
EP20060002852
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1702877A1 (en
Inventor
Masamichi c/o Hitachi Ltd. Intell.Prop. Tomita
Tomofumi c/o Hitachi Ltd. Intell.Prop. Hagiya
Atsuya c/o Hitachi Ltd. Intell. Property Fujino
Noboru c/o Hitachi Ltd. Intell. Prop. Arabori
Tomio c/o Hitachi Ltd. Intell. Prop. Hayano
Atsushi c/o Hitachi Ltd. Intell. Prop. Matsuura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP1702877A1 publication Critical patent/EP1702877A1/en
Application granted granted Critical
Publication of EP1702877B1 publication Critical patent/EP1702877B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types 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 in which a car and a counter weight are moved along guide rails in an elevator shaft.
  • An elevator system according to the preamble of claims 1 and 2 is already known i.e. from US-A-0035645 .
  • JP-A-2004-83231 teaches in paragraph 0023, Fig. 1 , Fig. 7 , etc. that the tension exerted to a rope becomes two third (2/3) as compared with a conventional 2:1 roping elevator system, the wind-up torque required of a drive unit is reduced and therefore the drive unit can be made small.
  • An object of the present invention is to provide an elevator system having a small-sized drive unit which facilitates maintenance of a brake section and a position detector thereof.
  • the present invention provides an elevator system having a car and a counter weight suspended by a rope within an elevator shaft and driven by a hoist, which comprises a suspending pulley provided on the upper part of the car, a rope hitch provided on the car, a suspending pulley provided on the upper part of the counterweight, and a rope hitch provided on the upper part of the counter weight, wherein the vertical projection of a sheave of the hoist is not overlapped with that of the car while the vertical projection of a brake section on the side remote from the sheave lies within that of the car.
  • the invention provides an elevator system having a car and a counter weight suspended in an elevator shaft by a rope and driven by a hoist, which comprises a suspending pulley provided on the upper part of the car, a rope hitch provided on the car, a suspending pulley provided on the upper part of the counter weight, and a rope hitch provided on the upper part of the counter weight, wherein the vertical projection of a sheave of the hoist is not overlapped with that of the car, and the vertical projection of an end of a position detector of the hoist on the side remote from the sheave lies within that of the car.
  • Fig. 1 is a view for explaining how to wind a rope 5 in the elevator system showing the first embodiment of the invention.
  • Fig. 2 is a horizontal sectional view of an elevator shaft in the elevator system of the embodiment, and
  • Fig. 3 is a sectional view illustrating a hoist in the elevator system of the embodiment.
  • Fig. 4 is a right side view of the elevator shaft in the elevator system of the embodiment, and
  • Fig. 5 is a front view of the elevator shaft in the elevator system of the embodiment.
  • the elevator system of the embodiment has a configuration in which a car 1 is moved up and down along guide rails 16a, 16b while a counter weight 12 is moved up and down along guide rails 17a, 17b.
  • the car 1 and a counter weight 12 are suspended by the rope 5 and are driven by a flat type hoist 10.
  • the flat type hoist referred to herein means a hoist having a shorter length in the direction of a rotational axis than a length in a direction orthogonal to the rotational axis.
  • an inward direction of the car 1 herein means the direction perpendicular to a car door 2, and the direction of coming away from the car door 2 in the elevator shaft will be referred to as rear.
  • the right side of the car 1 means the right side of the car 1 as viewed from an elevator hall.
  • a car upper frame 3 is installed on the ceiling of the car 1, and a suspending pulley 8 is mounted on the car upper frame 3. Further, a rope hitch 4 is provided on the right side of the car 1 in the vicinity of a car floor. Also on the upper part of the counter weight 12, a rope hitch 15 and a suspending pulley 13 are mounted.
  • the rope hitches 4, 15 have a function of taking up an elongation of the rope 5.
  • first diverting pulleys 7a, 7b whose vertical projections are substantially parallel to each other
  • second diverting pulleys 9a, 9b whose vertical projections are substantially parallel to each other
  • another second diverting pulley 9c and a third diverting pulley 14 whose vertical projections are substantially perpendicular to the vertical projections of the second diverting pulleys 9a, 9b.
  • the first diverting pulleys 7a, 7b, the suspending pulley 8, a drive sheave 11 of the flat type hoist 10 and the third diverting pulley 14 are arranged so that their vertical projections are substantially parallel with one another.
  • the second diverting pulleys 9a, 9b are arranged so that their vertical projections are inclined to the vertical projections of the first diverting pulleys 7a, 7b. Every diverting pulley is located above the ceiling of the car 1. Further, the positions of the rope hitch 4, the diverting pulleys 7a, 7b and the suspending pulley 8 are changeable because of adjusting margins provided in left and right directions as viewed in Fig. 2 , and a suspending condition of the car 1 may be adjusted during installation thereof.
  • the elevator system of the embodiment employs 3:1 roping in which the car 1 and the counter weight 12 are suspended with the use of the rope hitches 4, 15, and the suspending pulleys 8, 13.
  • the rope hitch 4 at first, one end of the rope 5 is fixed to the rope hitch 4 on the right side of the car 1 in the vicinity of the car floor, and the rope 5 is extended upward from the rope hitch 4 and is then extended horizontally from the first diverting pulley 7a to the other diverting pulley 7b by which the rope 5 is turned downward.
  • the rope 5 is turned upward by way of the suspending pulley 8 on the upper part of the car 1, then is wound around the upper part of the second diverting pulley 9a, and further, is wound around the upper part of the other second pulley 9b so as to be turned downward. Then, the rope 5 is wound around the lower part of the further other second diverting pulley 9c so as to be turned upward, and is then wound around the drive sheave 11 of the flat type hoist 10 so as to be turned downward. Then, the rope 5 is turned upward by way of the suspending pulley 13 on the upper part of the counter weight 12 and is extended to the rope hitch 15 on the upper part of the counter weight 12 by way of the third diverting pulley 14. The other end of the rope 5 is fixed to this rope hitch 15.
  • the flat type hoist 10 is installed so that a part of its vertical projection is positioned between the vertical projection of the car 1 and that of an elevator shaft wall 18, and the remainder of the vertical projection of the flat type hoist 10 is overlapped with that of the car 1.
  • the hoist is provided therein with a motor composed of a stator 27 and a rotor 28 on the side near the elevator shaft wall 18, and with a brake section 21 and a position detector 22 on the opposite side of the motor with the drive sheave 11 interposed therebetween.
  • the counter weight 12 is located in the rear of the car 1 in such a position that a part of the vertical projection of the flat type hoist 10 is overlapped with the vertical projection of the counter weight 12. Further, the vertical projection of the gravitational center of the flat type hoist 10 is positioned substantially between the vertical projections of the pair of guide rails 17a, 17bof the counter weight 12, and accordingly, a load of the flat type hoist 10 may be supported by the pair of guide rails 17a, 17b of the counter weight 12 through the intermediary of a support member which is not shown.
  • the suspended load is distributed to the three ropes, and accordingly, the suspended loads imparted to the diverting pulleys are reduced, resulting in reduction of the torque of the flat type hoist 10. That is, structural members and the flat type hoist 10 of the elevator system 10 may be made small and thereby it can be expected is possible to expect to reduce the manufacturing cost.
  • the position of the flat type hoist 10 may be adjusted.
  • the position of the flat type hoist 10 is adjusted in this embodiment so that the vertical projection of the drive sheave 11 is not overlapped with that of the car 1 while the vertical projection of an end of the brake section 21 on the side remote from the sheave 11 is located within that of the car 1.
  • the brake section 21 of the flat type hoist 10 is located facing a wide space in the elevator shaft, and accordingly, the maintenance of the brake section 21 can be easily carried out.
  • the vertical projection of an end of the position detector 22 on the side remote from the sheave is also located in that of the car 1, a wide space is present before the position detector 22 of the flat type hoist 10, and accordingly, the maintenance of the position detector 22 can be simplified. Further, work may be done near the brake section 21 and the position detector 2, and accordingly, the maintenance work can be easy and safe in that the worker need not lean out of the car.
  • the vertical projection of the position detector 22 is located within that of the car 1, there is such an advantage that even though the worker accidentally drops a component part during the servicing, the component part may highly possibly remain on the upper part of the car 1 without dropping onto the bottom of the elevator shaft.
  • Fig. 6 is a view for explaining how to wind the rope 5 in the elevator system showing the second embodiment of the invention
  • Fig. 7 is a horizontal sectional view of an elevator shaft in the elevator of this embodiment
  • Fig. 8 is an external view of a hoist in the elevator system of the embodiment
  • Fig. 9 is a right side view of the elevator shaft in the elevator system of the embodiment
  • Fig. 10 is a front view of the elevator shaft in the elevator of the embodiment.
  • the elevator system of this embodiment has a configuration basically the same as that of the first embodiment, and explanation will be made below with a focus on differences from the first embodiment.
  • a long type hoist 23 instead of the flat type hoist 10 used in the first embodiment, there is used a long type hoist 23.
  • the long type hoist herein means a hoist having a longer length in the direction of a rotation axis than a length in the direction orthogonal to the rotational axis.
  • a drive sheave 24 is arranged in the hoist on the side near an elevator shaft wall 18, and a brake section 25 and a position detector 26 are provided on the opposite side from the drive sheave 24 with a motor interposed therebetween.
  • Fig. 11 is a front view of an elevator shaft in the elevator system showing the third embodiment of the invention. Since the elevator system of this embodiment has a configuration basically the same as that of the second embodiment, explanation will be made below with a focus on differences from the second embodiment.
  • a rope hitch 19 is provided on the lower part of a floor panel of a car 1, and a fourth diverting pulley 20 is provided on the right end of the floor panel of the car 1.
  • the vertical dimensions of the rope hitch 19 can be made small even when the length of the rope hitch 19 is required to be longer, and accordingly, it is possible to limit vertical dimensions of components provided underneath the floor of the car 1 to the extent of the diameter of the diverting pulley 7a.
  • the vertical dimension of the car 1 can be decreased as compared with that in the second embodiment, and when the elevator system is installed in the elevator shaft of the same shape, an effective elevating stroke of the car 1 can be ensured of being longer than that in the second embodiment.
  • an application point of force exerted from the rope 5 to the lower part of the car 1 is divided into two positions of the rope hitch 19 and the diverting pulley 20, and thereby it is possible to effectively avoid the concentration of the force.
EP20060002852 2005-03-15 2006-02-13 Elevator system Expired - Fee Related EP1702877B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005072166A JP4474306B2 (ja) 2005-03-15 2005-03-15 エレベーター装置

Publications (2)

Publication Number Publication Date
EP1702877A1 EP1702877A1 (en) 2006-09-20
EP1702877B1 true EP1702877B1 (en) 2012-01-11

Family

ID=36475032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060002852 Expired - Fee Related EP1702877B1 (en) 2005-03-15 2006-02-13 Elevator system

Country Status (5)

Country Link
EP (1) EP1702877B1 (ja)
JP (1) JP4474306B2 (ja)
CN (1) CN1833981B (ja)
HK (1) HK1093193A1 (ja)
SG (1) SG126034A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101209794B (zh) * 2006-12-29 2010-10-06 上海三菱电梯有限公司 无机房电梯装置
CN102913016B (zh) * 2012-07-31 2017-06-06 中铁华铁工程设计集团有限公司 地、城铁列车升降装置
CN104326343A (zh) * 2014-10-30 2015-02-04 康力电梯股份有限公司 一种主机导轨固定式驱动装置
EP3106418B1 (en) * 2015-06-17 2020-09-30 KONE Corporation Solution for displacing an elevator car

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3724322B2 (ja) * 2000-03-15 2005-12-07 株式会社日立製作所 ワイヤロープとそれを用いたエレベータ
JP2002199659A (ja) * 2000-12-26 2002-07-12 Teijin Seiki Co Ltd エンコーダ付き回転駆動装置
FI4928U1 (fi) * 2001-01-25 2001-05-23 Kone Corp Hissi

Also Published As

Publication number Publication date
SG126034A1 (en) 2006-10-30
EP1702877A1 (en) 2006-09-20
JP2006256702A (ja) 2006-09-28
CN1833981B (zh) 2010-05-12
HK1093193A1 (en) 2007-02-23
CN1833981A (zh) 2006-09-20
JP4474306B2 (ja) 2010-06-02

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