JP4288933B2 - Low press elevator equipment - Google Patents

Low press elevator equipment Download PDF

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Publication number
JP4288933B2
JP4288933B2 JP2002331537A JP2002331537A JP4288933B2 JP 4288933 B2 JP4288933 B2 JP 4288933B2 JP 2002331537 A JP2002331537 A JP 2002331537A JP 2002331537 A JP2002331537 A JP 2002331537A JP 4288933 B2 JP4288933 B2 JP 4288933B2
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JP
Japan
Prior art keywords
elevator
guide rail
elevator car
arms
press
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
JP2002331537A
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Japanese (ja)
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JP2004161468A (en
Inventor
智哉 伊藤
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.)
Fujitec Co Ltd
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Fujitec Co 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
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Priority to JP2002331537A priority Critical patent/JP4288933B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、ロープを使用しないロープレスエレベータ装置に関するものである。
【0002】
【従来の技術】
近年、ロープを用いて巻上駆動によりエレベータかごを昇降させるトラクション式エレベータに代えて、リニアモータ駆動によりエレベータかごを昇降させるロープレスリニアモータエレベータ装置が提案されている。(例えば、特許文献1参照)
【0003】
【特許文献1】
特開2001−294381号公報
【0004】
即ち、図2に示すように、エレベータかご1の左右側面と昇降路2の左右内壁面とに、互いに間隙を介して対向する如くに、リニアモータ3の一次コイル4と二次導体5とを設け、このリニアモータ3の一次コイル4と二次導体5との間に発生する推力により、エレベータかご1を昇降路2内のガイドレール6に沿って走行させるものである。7はエレベータかご1に設けられたガイドローラで、ガイドレール6上を走行する。
【0005】
このようなロープレスエレベータでは、巻上機や主ロープを使用しないので、昇降行程に限界がなく超高層ビルに最適で、かつ、一つの昇降路内に複数台のエレベータかご1を設置できるメリットがある。
【0006】
【発明が解決しようとする課題】
しかし、ロープが存在しないため、停電や故障の際にエレベータかごを落下させない安全装置が必要不可欠であり、今まで種々の提案がなされているが、実用上満足できる装置が未だ開発されていないのが現状である。
【0007】
本発明は、上記の点に鑑みなされたもので、ロープレスエレベータに最適な安全装置を提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明は、一次コイルと二次導体とからなるリニアモータ駆動による推力でエレベータかごが昇降路内をガイドレールに沿って移動するエレベータにおいて、エレベータかごにはガイドレールの根元面を圧するアームが回動自在に設けられ、該アームにはボールねじが圧入され、該ボールねじには永久磁石を有する移動台を備えるものである。
【0009】
【発明の実施の形態】
本発明は、駆動源のリニアモータを利用して安全装置を構成するものである。
【0010】
【実施例】
以下、本発明の一実施例について、図面を用いて説明する。
図1は本発明に係る安全装置を備えたエレベータかごを示す要部全体図、図3は図1のP部拡大図、図4は図3のA-A線矢視図、図5は本発明に係る基本原理を示す説明図である。
【0011】
図中、図2と同一符号のものは同一のものを示すが、10はエレベータかご1に設けられた、例えばL字形のブラケット、11,12はガイドレール6の根元(即ち、ガイドローラが接触しないザラザラ面)と対向する一端にブレーキパッド11a,12aを有するアームで他端とブラケット10との間に引張りバネ13が設けられている。この引張りバネ13によりアーム11,12の他端相互の間隔が開く方向(ガイドレール6に対向する面が近づく方向)に常時付勢されている。
【0012】
そして、アーム11,12の中央部では、ボールねじ14,15が圧入され、このボールねじ14,15はブラケット10に回動自在に取付けられ、それぞれ逆方向にねじ溝が切られている。16はこのボールねじ14,15に嵌合し、このねじ溝に沿って移動する移動台で、外方に向けて張り出した状態で設けられている。この移動台16には、昇降路内壁の一次コイル4に対向するように永久磁石17が設けられている。
【0013】
このアーム11,12の動作について、次に説明する。
一次コイル4の電圧(ES<Er)と永久磁石5,17との電気的な位置関係は、図5(b)に示すとおりであり、一次電圧がErの時には、永久磁石17は永久磁石5と同じ位置に移動し、後述のとおりブレーキパッド11a,11bを開放し、一方一次電圧がESの時には、永久磁石17は定位置に戻り、ブレーキを掛けることになる。
【0014】
即ち、エレベータかごの運転に先立って、一次電圧レベルがEs→Erにアップすれば、図3に示すように永久磁石17が電磁力により上方へ移動し移動台16もそれについて上方へ移動するため、ボールねじ14は図4において左回転、ボールねじ15は右回転するので、アーム11は左回転、アーム12は右回転する結果、ブレーキパッド11a,12aがガイドレール6から離れブレーキが開放される。この状態は、電気的にエレベータかご1を停止・静止させることができる状態である。
【0015】
一方、エレベータかご1が着床階に停止して、一次電圧レベルがEr→Esに下げると、アーム11,12は引っ張りバネ13のバネ力によりブレーキパッド11a,12aがガイドレール6を挟圧することになり、機械的にエレベータかご1を静止させることになる。これは、停電の場合も同じようにブレーキが働きエレベータかご1を機械的に停止させることにつながる。
【0016】
ここで、本装置には次の条件が必要である。
図5(a)において、ブレーキの押付力をFf、かごの自重を含む積載荷重をW、ブレーキパット゛の摩擦係数をμ、永久磁石17の戻りトルクをTBPMとすると、
Wg≦2*Ff*μ
ブレーキモーメントMB
B=Ff*l1=FS*l2-BPM
f=(FS*l2−TBPM)/l1
BPM=0の場合は、
Wg≦(2*FS*l2*μ)/l1
S≧Wg*(1/2μ)*(l1/l2
の式から引っ張りバネ13のバネ圧を求めることができる。この条件を満たせば、停電時にも機械的にエレベータかご1を停止させられる。
【0017】
【発明の効果】
以上述べたように、本発明によればエレベータかごに推進力を与えるリニアモータを利用してブレーキを掛けたり外したりできるため、部品点数が少なく極めて簡単な構成の安全装置を得ることができる。又、エレベータ走行中に一次電圧EをEr>E>Esの範囲で、必要に応じて制御すれば、ブレーキパッドが緩やかにガイドレールに接触することになり、エレベータかご走行時の振動等を摩擦力により緩和することも可能である。
【図面の簡単な説明】
【図1】本発明に係る安全装置を備えたエレベータかごを示す要部全体図である。
【図2】ロープレスリニアモータエレベータの全体斜視図である。
【図3】図1のP部拡大図である。
【図4】図3のA-A線矢視図
【図5】本発明に係る基本原理を示す説明図である。
【符号の説明】
1 エレベータかご
3 リニアモータ
4 リニアモータ3の一次コイル
5 リニアモータ3の二次導体
6 ガイドレール
11,12 アーム
13 引っ張りバネ
14,15 ボールねじ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a low press elevator apparatus that does not use a rope.
[0002]
[Prior art]
In recent years, instead of a traction type elevator that lifts and lowers an elevator car by hoisting using a rope, a low press linear motor elevator apparatus that raises and lowers the elevator car by linear motor driving has been proposed. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-294281
That is, as shown in FIG. 2, the primary coil 4 and the secondary conductor 5 of the linear motor 3 are arranged so as to face the left and right side surfaces of the elevator car 1 and the left and right inner wall surfaces of the hoistway 2 with a gap therebetween. The elevator car 1 is caused to travel along the guide rail 6 in the hoistway 2 by a thrust generated between the primary coil 4 and the secondary conductor 5 of the linear motor 3. 7 is a guide roller provided in the elevator car 1 and runs on the guide rail 6.
[0005]
Such low press elevators do not use hoisting machines or main ropes, so there is no limit to the hoisting stroke, making it ideal for high-rise buildings and the ability to install multiple elevator cars 1 in one hoistway. There is.
[0006]
[Problems to be solved by the invention]
However, since there is no rope, a safety device that does not drop the elevator car in the event of a power outage or failure is indispensable, and various proposals have been made so far, but no device that is practically satisfactory has yet been developed. Is the current situation.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to provide an optimum safety device for a low press elevator.
[0008]
[Means for Solving the Problems]
The present invention relates to an elevator in which an elevator car is moved along a guide rail in a hoistway by a linear motor driven thrust composed of a primary coil and a secondary conductor. A ball screw is press-fitted into the arm, and the arm is provided with a moving table having a permanent magnet.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention constitutes a safety device using a linear motor as a driving source.
[0010]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is an overall view of an essential part of an elevator car equipped with a safety device according to the present invention, FIG. 3 is an enlarged view of a portion P in FIG. 1, FIG. It is explanatory drawing which shows the basic principle which concerns on invention.
[0011]
In the figure, the same reference numerals as those in FIG. 2 indicate the same components, but 10 is an L-shaped bracket provided on the elevator car 1, for example, and 11 and 12 are the roots of the guide rail 6 (that is, the guide rollers are in contact with each other). A tension spring 13 is provided between the other end and the bracket 10 by an arm having brake pads 11a and 12a at one end facing the rough surface. The tension spring 13 always urges the arms 11 and 12 in the direction in which the distance between the other ends of the arms 11 and 12 is increased (the direction in which the surface facing the guide rail 6 approaches).
[0012]
Ball screws 14 and 15 are press-fitted in the central portions of the arms 11 and 12, and the ball screws 14 and 15 are rotatably attached to the bracket 10 and have thread grooves cut in opposite directions. Reference numeral 16 denotes a moving base that is fitted to the ball screws 14 and 15 and moves along the thread groove, and is provided in a state of projecting outward. A permanent magnet 17 is provided on the moving table 16 so as to face the primary coil 4 of the inner wall of the hoistway.
[0013]
Next, the operation of the arms 11 and 12 will be described.
The electrical positional relationship between the voltage (E S <E r ) of the primary coil 4 and the permanent magnets 5 and 17 is as shown in FIG. 5B. When the primary voltage is E r , the permanent magnet 17 is Go to the same position as the permanent magnet 5, opens the brake pads 11a, 11b as described later, whereas when the primary voltage is E S is the permanent magnet 17 returns to the home position, so that the braking.
[0014]
That is, if the primary voltage level is increased from Es to Er prior to the operation of the elevator car, the permanent magnet 17 is moved upward by the electromagnetic force as shown in FIG. 4, the ball screw 14 rotates counterclockwise and the ball screw 15 rotates clockwise, so that the arm 11 rotates counterclockwise and the arm 12 rotates clockwise. As a result, the brake pads 11a and 12a are separated from the guide rail 6 and the brake is released. . This state is a state in which the elevator car 1 can be electrically stopped and stopped.
[0015]
On the other hand, when the elevator car 1 stops at the landing floor and the primary voltage level is lowered from Er to Es, the arms 11 and 12 cause the brake pads 11a and 12a to pinch the guide rail 6 by the spring force of the tension spring 13. Thus, the elevator car 1 is mechanically stopped. This also leads to the brake working in the case of a power failure and mechanically stopping the elevator car 1.
[0016]
Here, the following conditions are necessary for this apparatus.
In FIG. 5A, if the pressing force of the brake is F f , the loaded load including the weight of the car is W, the friction coefficient of the brake pad is μ, and the return torque of the permanent magnet 17 is T BPM .
Wg ≦ 2 * F f * μ
The brake moment M B is M B = F f * l 1 = F S * l 2− T BPM
F f = (F S * l 2 −T BPM ) / l 1
If T BPM = 0,
Wg ≦ (2 * F S * l 2 * μ) / l 1
F S ≧ Wg * (1/2 μ) * (l 1 / l 2 )
From this equation, the spring pressure of the tension spring 13 can be obtained. If this condition is satisfied, the elevator car 1 can be mechanically stopped even during a power failure.
[0017]
【The invention's effect】
As described above, according to the present invention, since a brake can be applied and removed using a linear motor that gives a propulsive force to an elevator car, a safety device having a very simple configuration with a small number of parts can be obtained. Also, if the primary voltage E is controlled as necessary in the range of E r >E> E s during elevator travel, the brake pads will gently come into contact with the guide rail, and vibration during travel of the elevator car, etc. It is also possible to relieve this by a frictional force.
[Brief description of the drawings]
FIG. 1 is an overall view of a main part showing an elevator car equipped with a safety device according to the present invention.
FIG. 2 is an overall perspective view of a low press linear motor elevator.
FIG. 3 is an enlarged view of a portion P in FIG.
4 is a view taken along line AA in FIG. 3. FIG. 5 is an explanatory diagram showing a basic principle according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Elevator car 3 Linear motor 4 Primary coil 5 of linear motor 3 Secondary conductor 6 of linear motor 3 Guide rail 11, 12 Arm 13 Tension spring 14, 15 Ball screw

Claims (1)

昇降路側に設置した一次コイルとかご側に設置した二次導体とからなるリニアモータ駆動による推力でエレベータかごが昇降路内をガイドレールに沿って移動するエレベータにおいて、
前記エレベータかごには前記ガイドレールの根元面を圧する一対のアームが回動自在に設けられるとともに、前記各アームの前記ガイドレールに対向する面が互いに近づくように前記アームを常時付勢させる付勢装置を備えており、前記各アームにはそれぞれボールねじが圧入されるとともにこれら各ボールねじは溝が逆方向に切られており、前記各ボールねじには一次コイルの電圧の高低によって上下動する永久磁石を有する移動台が備えられ、この移動台の上下動によって前記各ボールねじが互いに逆方向に回転して、前記アームの前記ガイドレールに対向する面が互いに接近離間する構成であることを特徴とするロープレスエレベータ装置。
In an elevator in which an elevator car moves along a guide rail in a hoistway by thrust generated by a linear motor consisting of a primary coil installed on the hoistway side and a secondary conductor installed on the car side ,
Wherein the elevator car Rutotomoni mounted for a pair of arms pivoted to press the base surface of the guide rail, the biasing of the arm is always biased so as the surface facing the guide rail of the arms are closer together includes a-energizing device, vertically moving the respective arm ball screw each is press-fitted to the Rutotomoni respective ball screws are cut in the groove is reverse, the by elevation of the voltage of the primary coil in each of the ball screw A moving table having a permanent magnet is provided, and the ball screws rotate in opposite directions by the vertical movement of the moving table, so that the surfaces of the arms facing the guide rails approach and separate from each other. Low press elevator equipment characterized by
JP2002331537A 2002-11-15 2002-11-15 Low press elevator equipment Expired - Fee Related JP4288933B2 (en)

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JP4288933B2 true JP4288933B2 (en) 2009-07-01

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007137586A (en) * 2005-11-17 2007-06-07 Shangyin Sci & Technol Co Ltd Ball screw type elevator control structure
JP5200409B2 (en) * 2007-04-18 2013-06-05 フジテック株式会社 Multi-car elevator safety device
WO2015084371A1 (en) * 2013-12-05 2015-06-11 Otis Elevator Company Ropeless high-rise elevator installation approach
JP2019048711A (en) * 2017-09-12 2019-03-28 株式会社日立製作所 Elevator and elevator control method

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