EP1577250B1 - Elevator system - Google Patents

Elevator system Download PDF

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Publication number
EP1577250B1
EP1577250B1 EP02808322A EP02808322A EP1577250B1 EP 1577250 B1 EP1577250 B1 EP 1577250B1 EP 02808322 A EP02808322 A EP 02808322A EP 02808322 A EP02808322 A EP 02808322A EP 1577250 B1 EP1577250 B1 EP 1577250B1
Authority
EP
European Patent Office
Prior art keywords
elevating
car
bodies
elevating bodies
elevator
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 - Lifetime
Application number
EP02808322A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1577250A4 (en
EP1577250A1 (en
Inventor
Susumu Mitsubishi Denki Kabushiki Kaisha MORITA
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1577250A1 publication Critical patent/EP1577250A1/en
Publication of EP1577250A4 publication Critical patent/EP1577250A4/en
Application granted granted Critical
Publication of EP1577250B1 publication Critical patent/EP1577250B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B66B5/284—Buffer-stops for cars, cages, or skips mounted on cars or counterweights
    • B66B5/286—Buffer-stops for cars, cages, or skips mounted on cars or counterweights between two cars or two counterweights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well

Definitions

  • the present invention relates to an elevator system and, more particularly, to an elevator system suitably used for a one-shaft multi-car elevator.
  • an elevator system called a one-shaft multi-car elevator system.
  • This elevator system has a plurality of cars arranged vertically in an elevator shaft, and moves them up and down by driving means independently driving each of the cars.
  • This elevator system when the elevator is used frequently, such as the time when workers come to and leave an office or a lunch hour for example, a plurality of cars can be operated while being controlled to prevent collision, and when the elevator is used less frequently, only one car can be operated. Thereby, efficient operation of elevator can be achieved, and space, cost, and the like for installing a plurality of elevator systems can be saved.
  • the elevator system of this type for example two cars are arranged vertically, and a lower car rope wound on a suspension sheave of a lower car on the lower side is wound on a lower car traction machine.
  • the lower car rope is then wound from the traction machine on a suspension sheave of a lower car balancing weight on the upper side of two balancing weights arranged vertically.
  • both ends of the lower car rope are fixed to an upper part of an elevator shaft.
  • an upper car rope fixed on the ceiling of an upper car arranged on the upper side is wound on an upper car traction machine. Successively, the upper car rope is caused to pass from the traction machine through a rope through hole formed in the lower car balancing weight, and is fixed to an upper car balancing weight arranged on the lower side.
  • the lower car is arranged on the lower side
  • the lower car balancing weight which is connected to the lower car via the lower car rope and is moved up and down in balance with the lower car at the time of vertical movement, is arranged on the upper side of the elevator shaft.
  • the upper car is arranged on the upper side of the elevator shaft, and the upper car balancing weight is arranged on the lower side of the elevator shaft.
  • a total of two shock absorbers are provided under the lower car and under the upper car balancing weight at the bottom of the elevator shaft.
  • the shock absorber under the lower car absorbs a shock when the lower car collides with the bottom of the elevator shaft due to a failure etc.
  • the shock absorber under the upper car balancing weight absorbs a shock of the upper car balancing weight that collides with the bottom of the elevator shaft when the upper car moves up and collides with the upper part of the elevator shaft, and thereby indirectly absorbs a shock of collision of the upper car.
  • the present invention proposes an improved elevator system for avoiding a collision between cars or balancing weights caused by upward or downward overshoot of car or by any other causes as described above or for alleviating the collision shock.
  • the present invention provides an elevator system including an elevator shaft; a plurality of elevating bodies which move up and down in the elevator shaft; driving means for independently moving the elevating bodies up and down; and between-elevating bodies braking means which moves up and down by being arranged between one elevating body of the elevating bodies and another elevating body arranged just under the elevating body, and stops independently as necessary between the one elevating body and the other elevating body.
  • the elevating bodies arranged vertically can be prevented from colliding directly with each other. Therefore, the safety of elevator system can further be ensured, and damage etc. caused by a collision between the elevating bodies can be prevented.
  • Figures 1 and 2 are schematic views for illustrating an elevator system 100 in accordance with the first embodiment of the present invention.
  • Figure 1 is a front view
  • Figure 2 is a side view.
  • the side on which a car doorway is provided is referred to as a front side (left-hand side in Figure 2 ), and the opposite side (right-hand side in Figure 2 ) is referred to as a back side.
  • the elevator system 100 includes an elevator shaft 2, a pair of car guide rails 4 erected in the elevator shaft 2, a pair of balancing weight guide rails 6, a lower car elevator 100a and an upper car elevator 100b, which move up and down independently in the elevator shaft 2.
  • the lower car elevator 100a includes a lower car 12a and a lower car balancing weight 14a, which move up and down in the elevator shaft 2. Also, below the lower car 12a is provided a suspension sheave 16, and above the lower car balancing weight 14a is provided a suspension sheave 18. On the upper side of the elevator shaft 2, a lower car traction machine 20a is provided. Both ends of a lower car rope 22a are fixed to rope retainers 24 provided above the elevator shaft 2. The lower car rope 22a extending from one end fixed to the rope retainer 24, is wound on the suspension sheave 16 below the lower car 12a, passing through the bottom of the lower car 12a, and is wound on the lower car traction machine 20a above the elevator shaft 2. Further, the lower car rope 22a extends from the lower car traction machine 20a, being wound on the suspension sheave 18 above the lower car balancing weight 14a, and the other end is fixed to the rope retainer 24.
  • the lower car elevator 100a is an elevator in which a rope is wound as in a 2:1 roping system.
  • a rope through hole 26 formed in the elevating direction is provided in the central portion of the lower car balancing weight 14a.
  • a lower car shock absorber 28a is provided at the bottom of the elevator shaft 2 under the lower car 12a.
  • the upper car elevator 100b includes an upper car 12b and an upper car balancing weight 14b, which move up and down in the elevator shaft 2. Also, on the upper side of the elevator shaft 2 is provided an upper car traction machine 20b. One end of an upper car rope 22b is fixed to a position near the center of the ceiling surface of the upper car 12b, and the other end thereof is fixed to a position near the center of the ceiling surface of the upper car balancing weight 14b. Also, a portion of the upper car rope 22b between the upper car 12b and the upper car balancing weight 14b is wound on the upper car traction machine 20b.
  • one end of the upper car rope 22b is fixed to the ceiling of the upper car 12b, and after the upper car rope 22b extends upwards and is wound on the upper car traction machine 20b from the upper car 12b, the upper car rope 22b passes through the rope through hole 26 in the lower car balancing weight 14a, and the other end thereof is fixed to the ceiling of the upper car balancing weight 14b.
  • the upper car elevator 100b is an elevator in which a rope is wound as in a 1:1 roping system.
  • an upper car shock absorber 28b is provided at the bottom of the elevator shaft 2 under the upper car balancing weight 14b.
  • the upper car 12b and the lower car 12a are arranged at the upper and lower positions, respectively, in the elevating direction in the elevator shaft 2. Specifically, the lower car 12a is arranged just under the upper car 12b, and always moves up and down in the range under the upper car 12b.
  • the lower car balancing weight 14a and the upper car balancing weight 14b are arranged at the upper and lower positions, respectively, in the elevating direction in the elevator shaft 2. Specifically, the lower car balancing weight 14a is arranged just over the upper car balancing weight 14b, and always moves up and down in the range over the upper car balancing weight 14b.
  • a between-cars brake system 30 is provided.
  • Figures 3 and 4 are schematic views for illustrating the between-cars brake system 30.
  • Figure 3 is a front view
  • Figure 4 is a side view.
  • one lower-side shock absorber 32a is provided on a rail gripper 34 so as to project downward. Also, on both sides of the lower-side shock absorber 32a, two upper-side shock absorbers 32b are arranged so as to project upward, and are provided on the rail gripper 34.
  • Both ends of the rail gripper 34 each are connected to a guide 36, and are provided movably on the car guide rail 4 by the guide 36. Also, on the rail gripper 34, supports 38 are provided on both sides of the upper-side shock absorbers 32b. Each of the supports 38 is provided with a lower-side collision detector 40a and an upper-side collision detector 40b, which project downward and upward, respectively.
  • the support 38 is filled with oil so that at the normal time, the collision detectors 40a and 40b project downward and upward by means of a hydraulic pressure of oil filled in the support 38.
  • a power unit 42 On the ceiling surface of the lower car 12a is provided a power unit 42.
  • the rail gripper 34 includes a lower-side support plate 48a and an upper-side support plate 48b, which are arranged perpendicularly to the car guide rails 4.
  • a lower holding member 50a is provided in a portion contacting with the car guide rail 4 at each end of the lower-side support plate 48a.
  • each of the lower holding members 50a is provided with a lower wedge-shaped groove 52a, the width of which decreases upward.
  • the lower-side support plate 48a is arranged perpendicularly to the car guide rails 4 in a state in which the lower wedge-shaped groove 52a provided at each end of the lower-side support plate 48a engages with the car guide rail 4.
  • an L-shaped lower lever 54a is provided at each end of the front side of the lower-side support plate 48a.
  • Each of the lower levers 54a is made up of a longitudinal portion and a transverse portion, which is connected to one end of the longitudinal portion and is provided perpendicularly thereto.
  • the longitudinal portion of the lower lever 54a is rotatably installed to each end of the lower-side support plate 48a by a lower rotation pin 56a.
  • the transverse portion is arranged in the direction directed from the front side to the back side.
  • a lower roller 58a is provided at one end of the transverse portion of the lower lever 54a on the back side.
  • the lower roller 58a is fitted in the lower wedge-shaped groove 52a together with the car guide rail 4.
  • one end of a lower spring 60a is fixed.
  • the other end of the lower spring 60a is fixed to the guide 36.
  • the lower spring 60a provides an elastic force so as to press the lower lever 54a downward.
  • a hydraulic lower pressing device 62a is provided on the surface of the lower lever 54a which is opposed to the surface on which the lower spring 60a is provided.
  • the lower pressing device 62a is filled with oil to apply pressure so as to provide a force for pushing back the elastic force of the lower spring 60a to the opposite side, i.e., upward by means of the hydraulic pressure.
  • the lower-side support plate 48a is provided with the lower holding member 50a, the lower wedge-shaped groove 52a, the lower lever 54a, the lower rotation pin 56a, the lower roller 58a, the lower spring 60a, and the lower pressing device 62a.
  • the upper-side support plate 48b are provided at each end of the upper-side support plate 48b at each end of the upper-side support plate 48b at each end of the upper-side support plate 48b at each end of the upper-side support plate 48b are provided an upper holding member 50b, an upper wedge-shaped groove 52b, an upper lever 54b, an upper rotation pin 56b, an upper roller 58b, an upper spring 60b, and an upper pressing device 62b in a form symmetrical with the lower-side support plate 48a with respect to a horizontal line.
  • the upper wedge-shaped groove 52b has a shape such that the width decreases downward.
  • the upper spring 60b provides a force pushing the upper lever 54b upward. Therefore, contrary to the lower pressing device 62a, the upper pressing device 62b provides a force such as to push back the upper lever 54b downward against a braking force of the upper spring 60b.
  • the lower-side support plate 48a and the upper-side support plate 48b, each of which is provided with the above-described elements, are arranged in parallel in the direction perpendicular to the car guide rails 4, by which the rail gripper 34 is formed.
  • Figure 5 is a schematic view for illustrating the state in which the power unit 42 is connected to the support 38 and the pressing devices 62a and 62b.
  • the power unit 42 provided on the ceiling of the lower car 12a is connected to each of the supports 38 by a hydraulic pipe 64 for support. Also, the power unit 42 is connected to each of the lower pressing devices 62a by a hydraulic pipe 66a for a lower pressing device, and is connected to each of the upper pressing devices 62b by a hydraulic pipe 66b for an upper pressing device.
  • the hydraulic pipe 66a for the lower pressing device and the hydraulic pipe 64 for support are connected to each other via a lower valve 68a, and the hydraulic pipe 66b for the upper pressing device and the hydraulic pipe 64 for support are connected to each other by an upper valve 68b. While in Figure 5 , only connections of the support 38 and the pressing devices 62a, 62b on one side are shown, the support 38 and the pressing devices 62a, 62b on the other side are practically connected in the same manner.
  • Figures 6 and 7 are schematic views for illustrating the state in which in the elevator system 100, the lower car 12a moves up and collides with the upper car 12b.
  • Figure 6 is a front view
  • Figure 7 is a side view.
  • Figures 8 and 9 are schematic views for illustrating the state in which in the elevator system 100, the upper car 12b moves down and collides with the lower car 12a.
  • Figure 8 is a front view
  • Figure 9 is a side view.
  • the lower car rope 22a is moved by a rotation of the lower car traction machine 20a.
  • the lower car 12a and the lower car balancing weight 14a move up or down in a balanced state while the tension of the lower car rope 22a is kept.
  • the upper car rope 22b is moved by a rotation of the upper car traction machine 20b.
  • the upper car 12b and the upper car balancing weight 14b move up or down in a balanced state while the tension of the upper car rope 22b is kept.
  • the lower car traction machine 20a and the upper car traction machine 20b can be driven independently to move the lower car 12a and the upper car 12b. Therefore, for example, only the upper car elevator 100b can be operated while the lower car elevator 100a is in a state in which the lower car 12a is stopped at a position lower than the lowest floor in the elevator shaft 2, so that the elevator system 100 can be operated according to the utilization frequency.
  • control is carried out to prevent the cars 12a and 12b from colliding with each other.
  • the lower car 12a When the lower car 12a does not stop due to any cause such as a failure of the traction machine etc. even if it moves downward further from the lowest floor in the elevator shaft 2, the lower car 12a collides with the lower car shock absorber 28a.
  • the lower car shock absorber 28a By the lower car shock absorber 28a, a shock caused when the lower car 12a collides with the bottom floor of the elevator shaft 2 is alleviated.
  • the upper car balancing weight 14b when the upper car 12b does not stop even if it moves upward further from the highest floor in the elevator shaft 2, the upper car balancing weight 14b inversely moves downward further from the lowest floor in the elevator shaft 2. In this case, the upper car balancing weight 14b collides with the upper car shock absorber 28b provided at the bottom of the elevator shaft 2. By the upper car shock absorber 28b, a shock caused when the upper car balancing weight 14b collides with the bottom floor of the elevator shaft 2 is alleviated. Thereby, a shock caused when the upper car 12b collides with the ceiling of the elevator shaft 2 is also alleviated indirectly.
  • the upper car 12b collides with the upper-side shock absorbers 32b of the stopped between-cars brake system 30, and stops while the collision shock is absorbed.
  • a shock caused when the lower car 12a comes close to the upper car 12b is absorbed by the collision with the lower-side shock absorber 32a. Further, when the lower car 12a drops downward due to a failure of the lower car traction machine 20a etc., the lower car 12a collides with the lower car shock absorber 28a, and stops while the collision shock is alleviated.
  • the collision shock can be absorbed by the between-cars brake system 30 provided between the lower car 12a and the upper car 12b. Also, since the between-cars brake system 30 can be stopped independently at a midway position in the elevator shaft 2, the downward movement of the upper car 12b can be stopped at that position. Therefore, damage etc. caused by a collision between the upper and lower cars can be prevented.
  • the between-cars brake system 30 can be operated in a case of power outage, a failure of control system, or the like.
  • the present invention is not limited to hydraulic operation.
  • the operation may be such that a collision is detected by a sensor or the like, and an electrical signal is sent to the pressing devices to release the elastic force of the springs 60a, 60b, by which the between-cars brake system is stopped.
  • between-cars brake system 30 is provided over the lower car 12a.
  • present invention is not limited to this configuration.
  • the between-cars brake system 30 may be provided on the bottom of the upper car 12b in any form.
  • the between-cars brake system 30 explained in the first embodiment has one lower-side shock absorber 32a and two upper-side shock absorbers 32b.
  • the present invention is not limited to this configuration.
  • the number and arrangement of the shock absorbers are not subject to any special restriction.
  • one shock absorber may be provided on the upper side and the lower side.
  • the between-cars brake system 30 in the first embodiment is stopped at a midway position of the car guide rail 4 by the wedge effect of the roller 58a, 58b and the wedge-shaped groove 52a, 52b of the rail gripper 34.
  • the present invention is not limited to this configuration.
  • the between-cars brake system 30 may be stopped by any other method.
  • the shapes of the between-cars brake system 30 and other elements of the present invention are not limited to those explained in this embodiment. Any other shape and structure that can achieve the same effect may be used.
  • Figure 10 is a front view for illustrating an elevator system 200 in accordance with the second embodiment of the present invention.
  • the elevator system 200 is similar to the elevator system 100 explained in the first embodiment.
  • the between-cars brake system 30 is not provided.
  • a between-balancing weights brake system 70 is provided over the upper car balancing weight 14b.
  • a structure of the between-balancing weights brake system 70 is the same as the structure of the between-cars brake system 30 in the first embodiment.
  • the between-balancing weights brake system 70 operates in the same way as the between-cars brake system 30. It operates when the upper and lower balancing weights 14a and 14b come close to each other, and is fixed to the balancing weight guide rails 6 by fitting rollers into wedge-shaped grooves engaging with the balancing weight guide rails 6.
  • the between-balancing weights brake system 70 is provided with the lower and upper shock absorbers 32a and 32b. When the balancing weight 14a, 14b collides with the stopped between-balancing weights brake system 70, it collides with the shock absorber 32a, 32b.
  • the collision shock between the upper and lower balancing weights 14a and 14b can be alleviated.
  • the alleviating of collision shock between the balancing weights 14a and 14b the collision between the cars 12a and 12b connected by the rope 22a, 22b can be restrained, or the collision shock can be alleviated.
  • between-balancing weights brake system 70 is provided on the ceiling of the upper car balancing weight 14b.
  • present invention is not limited to this configuration.
  • the between-balancing weights brake system 70 may be provided on the bottom of the lower car balancing weight 14a.
  • the between-balancing weights brake system 70 is provided only between the balancing weights 14a and 14b.
  • the between-cars brake system 30 as explained in the first embodiment may additionally be provided between the cars 12a and 12b.
  • an elevating body corresponds, for example, to the lower car 12a and the upper car 12b or the lower car balancing weight 14a and the upper car balancing weight 14b in the first and second embodiments
  • driving means corresponds, for example, to the lower car traction machine 20a and the upper car traction machine 20b.
  • between-elevating bodies braking means corresponds, for example, to the between-cars brake system 30 in the first embodiment or the between-balancing weights brake system 70 in the second embodiment.
  • a shock absorber corresponds, for example, to the lower-side shock absorber 32a and the upper-side shock absorbers 32b in the first and second embodiments
  • detecting means corresponds, for example, to the collision detectors 40a and 40b.
  • a braking member corresponds, for example, to the rollers 58a and 58b in the first and second embodiments
  • a projecting member corresponds, for example, to the collision detectors 40a and 40b
  • a pushing member corresponds, for example, to the springs 60a and 60b.
  • a pressing member corresponds, for example, to the pressing devices 62a and 62b
  • a pipe for detecting means corresponds, for example, to the hydraulic pipe 64 for support
  • a pressing member pipe corresponds, for example, to the hydraulic pipes 66a and 66b for pressing device.
  • between-elevating bodies braking means which stops independently, is provided between elevating bodies arranged vertically. Therefore, the elevating bodies arranged vertically can be prevented from colliding directly with each other, so that the safety of operation of elevator system can be ensured, and also damage etc. caused by the collision between the elevating bodies can be prevented.
  • the present invention is useful as the elevator system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Types And Forms Of Lifts (AREA)
EP02808322A 2002-12-24 2002-12-24 Elevator system Expired - Lifetime EP1577250B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/013445 WO2004058621A1 (ja) 2002-12-24 2002-12-24 エレベータ装置

Publications (3)

Publication Number Publication Date
EP1577250A1 EP1577250A1 (en) 2005-09-21
EP1577250A4 EP1577250A4 (en) 2011-05-25
EP1577250B1 true EP1577250B1 (en) 2012-12-19

Family

ID=32676938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02808322A Expired - Lifetime EP1577250B1 (en) 2002-12-24 2002-12-24 Elevator system

Country Status (5)

Country Link
EP (1) EP1577250B1 (zh)
JP (1) JP4302062B2 (zh)
KR (1) KR100633948B1 (zh)
CN (1) CN1321874C (zh)
WO (1) WO2004058621A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2665497T3 (es) 2004-12-16 2018-04-26 Otis Elevator Company Sistema de elevador con múltiples cabinas en un hueco de elevación
CN102530683A (zh) * 2004-12-16 2012-07-04 奥蒂斯电梯公司 在井道内具有多个轿厢的电梯系统
BRPI0820992A2 (pt) * 2007-12-14 2015-06-16 Inventio Ag Freio de ascensão para dois corpos de elevadores se movendo independentemente um do outro
CN105967023A (zh) * 2016-07-25 2016-09-28 无锡福镁轻合金科技有限公司 一种施工升降机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896776A (en) * 1928-02-17 1933-02-07 Westinghouse Electric & Mfg Co Multiple elevator system
JPS59153773A (ja) * 1983-02-04 1984-09-01 株式会社東芝 エレベ−タ
JPH02106570A (ja) * 1988-10-12 1990-04-18 Mitsubishi Electric Corp エレベータ
JPH07157243A (ja) * 1993-12-07 1995-06-20 Hitachi Ltd エレベータの衝突防止装置
JP2004168450A (ja) * 2002-11-18 2004-06-17 Mitsubishi Electric Corp エレベーター装置

Also Published As

Publication number Publication date
KR100633948B1 (ko) 2006-10-13
WO2004058621A1 (ja) 2004-07-15
EP1577250A4 (en) 2011-05-25
CN1321874C (zh) 2007-06-20
JP4302062B2 (ja) 2009-07-22
CN1615264A (zh) 2005-05-11
JPWO2004058621A1 (ja) 2006-04-27
EP1577250A1 (en) 2005-09-21
KR20050002831A (ko) 2005-01-10

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