EP1518811B1 - Elevator apparatus - Google Patents

Elevator apparatus Download PDF

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Publication number
EP1518811B1
EP1518811B1 EP03733305A EP03733305A EP1518811B1 EP 1518811 B1 EP1518811 B1 EP 1518811B1 EP 03733305 A EP03733305 A EP 03733305A EP 03733305 A EP03733305 A EP 03733305A EP 1518811 B1 EP1518811 B1 EP 1518811B1
Authority
EP
European Patent Office
Prior art keywords
arm
car
elevator apparatus
buffer
secured
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
EP03733305A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1518811A4 (en
EP1518811A1 (en
Inventor
Hiroshi Mitsubishi Denki Kabushiki Kaisha KIGAWA
Kenichi Mitsubishi Denki Kabushiki Kaisha OKAMOTO
Hideaki Mitsubishi Denki Kabushiki Kaisha KODERA
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
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1518811A1 publication Critical patent/EP1518811A1/en
Publication of EP1518811A4 publication Critical patent/EP1518811A4/en
Application granted granted Critical
Publication of EP1518811B1 publication Critical patent/EP1518811B1/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
    • B66B5/282—Structure thereof

Definitions

  • the present invention relates to an elevator apparatus including a buffer disposed in a pit in a lower portion of a hoistway, for stopping a car that has descended below a landing position of a lowermost floor, for example, and for absorbing mechanical shock therefrom.
  • JP 05 246647 A discloses a method of improving the reliability and safety of a shock absorber and an elevator device using it by surely detecting restoration of a plunger of a buffer device to a regular restoration position.
  • a supporting member is fixed on a supporting plate installed at the top part of the plunger of the shock absorber and a movable contact point is installed on the supporting member.
  • a fixed contact point is arranged in opposed state to the movable contact point. When the plunger is lowered, the plunger shifts the movable contact point and cuts off the contact with the fixed contact point.
  • the present invention aims to solve the above problems and an object of the present invention is to provide an elevator apparatus enabling a cross-sectional area of a hoistway to be reduced, etc.
  • an elevator apparatus including: a hoistway; a hoisted body ascending and descending inside the hoistway; a buffer disposed in a pit in a lower portion of the hoistway, for stopping the hoisted body and for absorbing mechanical shock therefrom; an arm disposed under the hoisted body, for tracking vertical movement of the hoisted body; and a switch activated in response to downward movement of the arm, for stopping the hoisted body, the switch and the arm being disposed inside a vertical plane of projection of the hoisted body.
  • Figure 1 is a structural diagram of an elevator apparatus according to Embodiment 1 of the present invention.
  • This elevator apparatus includes: a hoistway 1; a machine room 2 formed in an upper portion of the hoistway 1; a hoisting machine 9 disposed inside the machine room 2; a car 7 constituting a hoisted body and a counterweight 8 constituting a hoisted body, suspended like well buckets by means of a rope 6 on a sheave 4 of the hoisting machine 9 and a deflection sheave 5; a car buffer 11 secured in a pit 10 in a lower portion of the hoistway 1 directly under the car 7; and a counterweight buffer 12 secured in the pit 10 in the lower portion of the hoistway 1 directly under the counterweight 8.
  • the elevator apparatus includes: a car arm 13 secured to the car buffer 11; an upper portion terminal safety switch 14 secured to the car buffer 11, constituting a limit switch during maintenance inspections; and a lower portion terminal safety switch 15 constituting a limit switch operating before the car buffer 11 finishes operating.
  • the car buffer 11 is a hydraulic buffer with an orifice bar, and includes: a base 16; a buffer main body 17 secured to the base 16; two pairs of bar-shaped guides 18 disposed so as to be secured to the base 16 in front of and behind the buffer main body 17 respectively; an angular U-shaped guide plate 19 that can slide vertically relative to the guides 18; and springs 22 disposed so as to surround the guides 18 and force the guide plate 19 toward the car 7.
  • the buffer main body 17 includes: a cylindrical fixed portion 20 containing oil; and a cylindrical movable portion 21 vertically slidable relative to the fixed portion 20.
  • a counterweight 8 side of this elevator apparatus also has a construction similar to a car 7 side.
  • the counterweight buffer 12 includes: a counterweight arm 30 secured to the counterweight buffer 12; an upper portion terminal safety switch 31 secured to the counterweight buffer 12, constituting a limit switch during maintenance inspections; and a lower portion terminal safety switch 32 constituting a limit switch operating before the counterweight buffer 12 finishes operating.
  • the counterweight buffer 12 also includes: a base 33; a buffer main body 34 constituted by a fixed portion 38 and a movable portion 39; bar-shaped guides 35; a guide plate 36; and springs 37, all similar to those of the car buffer 11.
  • the car arm 13 tracks the descent of the car 7 and is placed in contact with the lower portion terminal safety switch 15, and the lower portion terminal safety switch 15 is activated, interrupting the power source of the elevator apparatus to make the car 7 perform an emergency stop.
  • the lower portion terminal safety switch 15 is installed so as to be activated before the movable portion 21 of the car buffer 11 reaches its maximum stroke position, in other words, before the car 7 reaches a car range lowermost end position in Figure 2 .
  • the lower portion terminal safety switch 32 is installed so as to be activated before the movable portion 39 of the counterweight buffer 12 reaches its maximum stroke position, in other words, before the car 7 reaches a range uppermost end position (not shown).
  • the cross-sectional area of the hoistway 1 can be reduced compared to conventional constructions.
  • switches and guides on which a guide plate to which an arm is secured slides vertically and is guided may also be secured to a lower surface of a hoisted body.
  • a tip end surface of the arm is placed in contact with an arm receiver disposed on a bottom surface of the pit and the switches are activated by a base end surface of the arm approaching and contacting the switches.
  • FIG. 4 is a structural diagram of an elevator apparatus according to Embodiment 2 of the present invention.
  • a car arm 13 is secured directly to a car 7, and the car arm 13 tracks the vertical movement of the car 7 directly.
  • a counterweight arm 30 is secured directly to a counterweight 8, and the counterweight arm 30 tracks the vertical movement of the counterweight 8 directly.
  • the car 7 and the counterweight 8 ascend and descend while being supported horizontally on guide rails installed in a vertical direction of the hoistway (not shown), the vertical movement of the arms 13 and 30 secured to the car 7 and the counterweight 8 is reliable and stable.
  • springs 22 and 37 for resetting the arms 13 and 30, guides 18 and 35 for guiding those springs 22 and 37, and guide plates 19 and 36 integrated with the arms 13 and 30 are all no longer necessary, making the construction simple compared to that of Embodiment 1.
  • an arm is secured to a hoisted body, and a buffer is secured to a pit, but the buffer may also be secured directly to the hoisted body, and the arm secured to the pit.
  • FIG. 5 is a structural diagram of an elevator apparatus according to Embodiment 3 of the present invention.
  • magnets 50 constituting a guide plate holding means are secured to an end portion of a guide 18 on a car 7 side.
  • a guide plate 19 adheres to the magnets 50 due to the magnetic force from these magnets 50.
  • a magnet 51 constituting an arm holding means is secured to an end portion of a car arm 13 on the car 7 side.
  • a car arm 13 adheres to the car 7 due to the magnetic force from this magnet 51.
  • the car arm 13 is held by a car buffer 11 by means of the guide plate 19 held by the magnets 50 when the car 7 ascends and descends inside a hoisting range between the uppermost floor landing position and the lowermost floor landing position.
  • a counterweight arm 30 adheres to the counterweight 8 due to a magnet, and a counterweight guide 35 is simultaneously separated from magnets. Next, the counterweight arm 30 moves downward tracking the ascent of the car 7, and thereafter performs an operation similar to that of Embodiment 1.
  • springs 22 and 37 for resetting the arms 13 and 30 are no longer necessary, also enabling it to be applied to cases in which the descent speed of the car 7 is low, and the strokes of the movable portions 21 and 39 of the buffers 11 and 12 are short, in a similar manner to Embodiment 2.
  • magnets 50 are used for the guide plate holding means, but of course the guide plate holding means is not limited to this.
  • the construction may also be such that when a guide plate reaches an end portion of a guide, the guide plate engages physically with the end portion of the guide, and the guide plate moves downward when an external force in a downward direction acts on the guide plate.
  • a magnet 51 is used for the arm holding means, but of course the arm holding means is not limited to this.
  • the construction may also be such that when a hoisted body and an arm collide, they engage physically with each other at an end portion of the arm, and are separated when a separating force acts between the hoisted body and the arm.
  • FIG. 6 is a structural diagram of an elevator apparatus according to Embodiment 4 of the present invention.
  • a car arm 13 is secured to a car 7, and an upper portion terminal safety switch 14 and a lower portion terminal safety switch 15 are secured to the car arm 13.
  • a receiving portion 52 for contacting the upper portion terminal safety switch 14 and the lower portion terminal safety switch 15 is secured to a side surface of the car buffer 11.
  • springs 22 and 37 for resetting the arms 13 and 30, guides 18 and 35 for guiding those springs 22 and 37, and guide plates 19 and 36 integrated with the arms 13 and 30 are all no longer necessary, making the construction simple compared to that of Embodiment 1.
  • the present invention can be used to reduce cross-sectional area in a hoistway of an elevator apparatus including a buffer disposed in a pit in a lower portion of the hoistway, for stopping a descending hoisted body and for absorbing mechanical shock therefrom.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

この発明に係るエレベータ装置では、昇降路と、この昇降路内を昇降するかごと、昇降路の下部のピットに設けられ、かごを受け止めるとともにその衝撃を吸収するかご用緩衝器と、かごの下側に設けられ、かごの上下動に追従するかご用アームと、このかご用アームの下動に応じて作動しかごを停止させるスイッチとを備えている。スイッチおよびかご用アームは、かごの鉛直投影面内に設けられているので、昇降路の横断面積は縮小される。
EP03733305A 2003-06-06 2003-06-06 Elevator apparatus Expired - Lifetime EP1518811B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/007213 WO2004108575A1 (ja) 2003-06-06 2003-06-06 エレベータ装置

Publications (3)

Publication Number Publication Date
EP1518811A1 EP1518811A1 (en) 2005-03-30
EP1518811A4 EP1518811A4 (en) 2009-05-13
EP1518811B1 true EP1518811B1 (en) 2010-12-15

Family

ID=33495941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03733305A Expired - Lifetime EP1518811B1 (en) 2003-06-06 2003-06-06 Elevator apparatus

Country Status (5)

Country Link
EP (1) EP1518811B1 (ja)
JP (1) JP4323483B2 (ja)
CN (1) CN100379669C (ja)
DE (1) DE60335370D1 (ja)
WO (1) WO2004108575A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI118642B (fi) * 2006-04-28 2008-01-31 Kone Corp Hissijärjestelmä
KR101025064B1 (ko) * 2006-11-20 2011-03-25 미쓰비시덴키 가부시키가이샤 엘리베이터 장치
JP2011256001A (ja) * 2010-06-08 2011-12-22 Hitachi Ltd エレベータ装置
CN105151946A (zh) * 2015-06-30 2015-12-16 胡国良 具安全缓冲装置的电梯
CN104961012A (zh) * 2015-07-06 2015-10-07 康力电梯股份有限公司 一种底坑检修保护装置
CN105129571A (zh) * 2015-09-16 2015-12-09 镇江朝阳机电科技有限公司 一种电梯缓冲器自动断电机构
EP3401260B1 (en) 2017-05-12 2023-08-09 Otis Elevator Company Elevator overrun systems
CN108709529B (zh) * 2018-05-22 2020-05-12 马鞍山鹏远电子科技有限公司 一种矿井施工深度检测用定位装置
CN108516439A (zh) * 2018-05-24 2018-09-11 苏州瓦尔尼智能科技有限公司 一种智能楼宇用的缓冲式电梯
CN108439131A (zh) * 2018-05-24 2018-08-24 苏州瓦尔尼智能科技有限公司 一种智能楼宇电梯用的多级减冲底座
JP7213847B2 (ja) * 2020-06-02 2023-01-27 三菱電機株式会社 エレベータの油入緩衝器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55119244A (en) * 1979-03-05 1980-09-12 Mitsubishi Electric Corp Oil damper for elevator
JPS61166482A (ja) * 1985-01-16 1986-07-28 三菱電機株式会社 エレベ−タ装置
JPH0188687U (ja) * 1987-12-01 1989-06-12
JPH0396728A (ja) * 1989-09-07 1991-04-22 Mitsubishi Electric Corp 緩衝器
JPH05246647A (ja) * 1992-03-06 1993-09-24 Hitachi Ltd 緩衝装置及びそれを使用したエレベーター装置
JPH07157219A (ja) * 1993-12-01 1995-06-20 Mitsubishi Electric Corp エレベータの安全装置
JP4698845B2 (ja) * 2001-01-11 2011-06-08 三菱電機株式会社 エレベーターの緩衝装置
JP4903953B2 (ja) * 2001-07-31 2012-03-28 東芝エレベータ株式会社 エレベータの緩衝装置

Also Published As

Publication number Publication date
CN100379669C (zh) 2008-04-09
DE60335370D1 (de) 2011-01-27
EP1518811A4 (en) 2009-05-13
JPWO2004108575A1 (ja) 2006-07-20
WO2004108575A1 (ja) 2004-12-16
JP4323483B2 (ja) 2009-09-02
EP1518811A1 (en) 2005-03-30
CN1665735A (zh) 2005-09-07

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