JPH0111654Y2 - - Google Patents
Info
- Publication number
- JPH0111654Y2 JPH0111654Y2 JP1982051870U JP5187082U JPH0111654Y2 JP H0111654 Y2 JPH0111654 Y2 JP H0111654Y2 JP 1982051870 U JP1982051870 U JP 1982051870U JP 5187082 U JP5187082 U JP 5187082U JP H0111654 Y2 JPH0111654 Y2 JP H0111654Y2
- Authority
- JP
- Japan
- Prior art keywords
- car
- motor
- power
- generator
- power outage
- 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
Links
- 230000002238 attenuated effect Effects 0.000 claims description 5
- 238000009408 flooring Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 14
- 230000006698 induction Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はワードレオナード接続された直流電動
発電機と直流電動機を有する直流エレベーターに
おける停電時の救出装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rescue device in the event of a power outage in a DC elevator having a DC motor generator and a DC motor connected by Ward Leonard.
エレベーターは走行中停電となると、第１図の
電磁ブレーキMgBが動作し、直流電動機Ｍを制
動し非常停止する。ところで、この時点では、直
流電動発電機Ｇは停電後もしばらく回転エネルギ
ーが蓄積されているため慣性で回転を続けるの
で、従来この回転を利用し、非常停止直後に第２
図のバツテリーＢ、充電器Ａよりなる非常電源装
置により制御回路２、直流電動発電機の界磁GF、
直流電動機の界磁MF及び電磁ブレーキコイル
MBに給電し、直流電動発電機Ｇの慣性による回
転力を利用して発生する起電力によつて直流電動
機Ｍに駆動力を与えると共に、シーブＳを介して
連結された乗かごCAと釣り合い錘CWの重量差
により生じる不平衡負荷を検出し、この不平衡負
荷を利用し運転負担の軽い方向に運転させる停電
時におけるエレベーターの自動着床方式が特公昭
51−9231号公報で論じられている。
If the elevator experiences a power outage while it is running, the electromagnetic brake MgB shown in Figure 1 operates, braking the DC motor M and bringing it to an emergency stop. By the way, at this point, the DC motor generator G continues to rotate due to inertia even after a power outage because rotational energy has been accumulated for a while.
The control circuit 2, the field GF of the DC motor generator,
DC motor field MF and electromagnetic brake coil
Power is supplied to the MB, and the electromotive force generated by the rotational force due to the inertia of the DC motor generator G provides driving force to the DC motor M, and the counterweight is connected to the car CA connected via the sheave S. Tokkosho has developed an automatic landing system for elevators during power outages that detects the unbalanced load caused by the weight difference between CWs and uses this unbalanced load to operate the elevator in a direction that reduces the operating burden.
Discussed in Publication No. 51-9231.
ところで、停電となると直流電動発電機Ｇを駆
動する誘導電動機IMへの供給電源がなくなり、
直流電動発電機Ｇの回転力は次第に低下して行く
ことになり、従つて発生する起電力にも限界があ
る。そして、上記した従来技術にあつては、停電
により一旦停止されたエレベーターを再起動させ
る際、乗かごCAと釣り合い錘CWとの間に大き
な不平衡差が生じていれば、この不平衡差を利用
して静止摩擦力を脱することができ、このときに
直流電動機Ｍで消費される電力はほとんどないの
で、電力消費による慣性力を利用した回転エネル
ギーの急激な消費はなく、回転数が急激に低下す
ることはない。そのため、慣性による回転エネル
ギーを利用して救出階まで運転させることができ
るが、しかしながら、乗かごCAと釣り合い錘
CWとの釣り合い状態がほぼ平衡となつている
と、静止摩擦力を脱するのに消費される電力は大
きくなり、そのため、直流電動発電機Ｇは急激に
回転エネルギーが消費されてその回転数は極度に
減少されてしまい、そして、発生電力が低下され
ることから直流電動機Ｍへの乗かごCAの走行可
能距離に相応する供給電力にも限界が生じ、乗か
ごCAが救出可能な階に到着できなくなるという
不都合が発生する。
By the way, when there is a power outage, the power supply to the induction motor IM that drives the DC motor generator G disappears,
The rotational force of the DC motor generator G gradually decreases, and therefore there is a limit to the electromotive force that can be generated. In the conventional technology described above, when restarting an elevator that has been temporarily stopped due to a power outage, if there is a large unbalance difference between the car CA and the counterweight CW, this unbalance difference is corrected. At this time, almost no electric power is consumed by the DC motor M, so there is no rapid consumption of rotational energy using inertia due to electric power consumption, and the rotational speed suddenly increases. will not decrease. Therefore, it is possible to drive the car to the rescue floor using rotational energy due to inertia. However, the car CA and counterweight
When the balance with the CW is almost in equilibrium, the power consumed to overcome the static friction force increases, and as a result, the rotational energy of the DC motor generator G is rapidly consumed, and its rotational speed decreases. As the generated power is reduced to an extremely low level, there is a limit to the amount of power that can be supplied to the DC motor M corresponding to the distance that the car CA can travel, and the car CA reaches a floor where it can be rescued. This causes the inconvenience of not being able to do so.
本考案は、上記実情に鑑みてなされたものであ
つて、その目的とするところは、乗かごと釣り合
い錘とが平衡状態となつた場合、起動時の電力消
費で慣性による回転エネルギーが極度に減少され
てその回転エネルギーによる救出運転が行なえな
くなるのを防止するようにしたエレベーターの停
電時自動着床装置を提供することにある。 The present invention was developed in view of the above-mentioned circumstances, and its purpose is that when the car and the counterweight are in equilibrium, the rotational energy due to inertia due to power consumption during startup is extremely high. To provide an automatic landing device for an elevator during a power outage, which prevents the rotational energy from being reduced and the rescue operation cannot be performed.
上記目的を達成するために、本考案のエレベー
ターの停電時自動着床装置は、ワードレオナード
接続された直流電動発電機と直流電動機、この直
流電動機によつて昇降駆動される乗かごを有する
エレベーターにあつて、停電時に上記発電機及び
電動機の各界磁に給電する非常電源を備え、か
つ、停電時乗かご内負荷を検出しこの乗かごに対
応する釣り合い錘の荷重との比較により上記乗か
ごの運転方向を運転負担の軽い方向へ自動的に決
定すると共に、停電時に上記発電機及び電動機の
各界磁に対して決定された方向となるように上記
非常電源から給電するようにした制御回路とを備
え、上記乗かごを上記電動発電機の回転エネルギ
ーと上記非常電源とにより運転するよう構成した
ものにおいて、停電時乗かご内負荷を検出しこの
乗かごと対応する釣り合い錘との釣り合い状態が
ほぼ平衡となつたとき出力信号を送出する平衡状
態判別回路を上記制御回路に備えると共に、上記
出力信号により上記非常電源の電力を上記発電機
を回転させる電動機に供給し上記発電機の回転力
が極度に減衰するのを抑制する手段を具備した構
成にしている。
In order to achieve the above object, the automatic landing device during a power outage for an elevator according to the present invention is applied to an elevator having a DC motor generator and a DC motor connected by Ward Leonard, and a car that is driven up and down by the DC motor. The system is equipped with an emergency power source that supplies power to each field of the generator and motor in the event of a power outage, and detects the load in the car during a power outage and compares it with the load on the counterweight corresponding to the car. A control circuit that automatically determines the direction of operation in a direction with a lighter operating burden, and supplies power from the emergency power source so that the fields of the generator and motor are in the determined direction in the event of a power outage. In the case where the car is configured to be operated by the rotational energy of the motor generator and the emergency power source, the load inside the car is detected during a power outage, and the car is almost in a balanced state with the corresponding counterweight. The control circuit is equipped with an equilibrium state determination circuit that sends out an output signal when equilibrium is reached, and the output signal supplies power from the emergency power source to the motor that rotates the generator, so that the rotational force of the generator is extremely high. The structure is equipped with means for suppressing the attenuation.
本考案にあつては、乗かごとそれに対応する釣
り合い錘との釣り合いがほぼ平衡状態となつたと
き、非常電源により電動発電機を回転させる電動
機に対して電力を供給するようにしてあるので、
一旦停止されたエレベーターを再起動させる際の
静止摩擦力を脱するのに必要な電力供給のため慣
性による回転エネルギーが極度に減衰されるのを
防止でき、平衡負荷のときにも慣性による電動発
電機の回転を救出移動距離まで持続させることが
可能となり、従つて非常電源の容量を従来に対し
て僅かな増加分で平衡負荷に応じた救出運転を確
実に行なうことができる。
In the present invention, when the balance between the car and its corresponding counterweight is approximately in equilibrium, the emergency power source supplies power to the electric motor that rotates the motor generator.
Because it supplies the power necessary to overcome the static friction force when restarting an elevator that has been stopped, it can prevent the rotational energy due to inertia from being extremely attenuated, and even when there is a balanced load, electric power generation is generated using inertia. It becomes possible to maintain the rotation of the machine up to the rescue movement distance, and therefore, rescue operation corresponding to the balanced load can be reliably performed with a slight increase in the capacity of the emergency power source compared to the conventional one.
以下、本考案の一実施例を第３図に基づいて説
明する。
An embodiment of the present invention will be described below with reference to FIG.
図中、第１図及び第２図と同符号のものは同一
のものを示し、Ｗは乗かごCAの負荷状態を検出
する負荷検出装置、Wtは負荷検出装置Ｗから出
力される負荷検出信号が乗かごCAと釣り合い錘
CWとの釣り合いが平衡状態となる信号であると
き制御回路２より出力される平衡負荷判別信号、
ya1，ya2はそれぞれに商用電源SAの電圧を検出
して付勢される商用電源検出リレー（図示せず）
の常開接点、yb1，yb2はそれぞれに上述した商用
電源検出リレーが消勢された後に乗かごCAが一
旦停止するのに要する所定時間（例えば、乗かご
CAの走行速度に関連するが通常１秒程度）経過
後に消勢するよう構成されたタイムリレー（図示
せず）の常閉接点、Ｘは停電後に乗かごCAが着
床位置に到達すると付勢される着床位置検出リレ
ー（図示せず）の常閉接点、IVはインバータ装
置である。 In the figure, the same reference numerals as in Figures 1 and 2 indicate the same things, W is a load detection device that detects the load state of the car CA, and Wt is a load detection signal output from the load detection device W. is the car CA and the counterweight
a balanced load determination signal output from the control circuit 2 when the signal is balanced with the CW;
ya 1 and ya 2 are commercial power supply detection relays (not shown) that are energized by detecting the voltage of the commercial power supply SA, respectively.
The normally open contacts, yb 1 and yb 2 of
A normally closed contact of a time relay (not shown) that is configured to de-energize after a period of time (related to the running speed of the CA, but usually about 1 second); The normally closed contact of the landing position detection relay (not shown), IV, is an inverter device.
今、乗かごCAが走行中に停電となると、商用
電源SAからの電力供給がなくなり、上述した商
用電源検出リレーが消勢されてその常開接点ya1
及びya2が開放されることにより、誘導電動機IM
に対する駆動電力の供給が断たれると共に、制御
回路２の制御電源の供給が断たれて図示していな
い公知の回路で電磁ブレーキコイルMBの励磁が
解除されて電磁ブレーキMgBが釈放動作し、こ
れによつて乗かごCAは非常停止される。そして、
商用電源検出リレーが消勢されてから所定時間経
過すると上述したタイムリレーが消勢されその常
閉接点yb1及びyb2が閉成され、このとき、乗かご
CAが着床位置に停止していないと上述した着床
位置検出リレーは消勢されており、その常閉接点
Ｘは閉成されバツテリーＢより常閉接点yb2を介
して制御回路２に電力が供給されると共に、常閉
接点yb2及び常閉接点Ｘを介して電磁ブレーキコ
イルMBに電力が供給される。制御回路２はバツ
テリーＢから電力が供給されると、乗かごCAの
負荷状態を検出する負荷検出装置Ｗからの負荷検
出信号により公知の回路で運転させる運転方向を
決定すると共に、負荷検出装置Ｗからの負荷検出
信号が乗かごCAと対応する釣り合い錘CWとの
釣り合いとが平衡状態となる負荷であるとき平衡
負荷状態と判別し平衡負荷判別信号Wtを出力す
る。そして、制御回路２は運転方向の決定に基づ
いて電動発電機Ｇ及び電動機Ｍの各界磁GF及び
MFに対してバツテリーＢより励磁電流を供給す
る。一方、前述したように電磁ブレーキコイル
MBにはバツテリーＢより電力が供給され、電磁
ブレーキMgBは乗かごCAの静止状態を解除する
動作が行われており、停電直後は誘導電動機IM
の給電が断たれても電動発電機Ｇは慣性による回
転エネルギーが蓄積され回転されているため界磁
GFに励磁電流が供給されると電動機Ｍに対して
電圧を発生させる。さて、乗かごCAと釣り合い
錘CWとが平衡状態にあるエレベーターを静止摩
擦力から脱する電力の供給が行われると、慣性に
よる回転エネルギーは急激に減衰されることにな
り、そして、乗かごCAを救出可能な階に走行さ
せるまで電動発電機Ｇの慣性による回転を維持で
きなくなるが、今、制御回路２からは平衡状態判
別信号Wtが出力されており、そして、バツテリ
ーＢの直流電力はインバータ装置IVで交流電力
に変換され、この変換された交流電力が平衡状態
判別信号Wt及び前述したタイムリレーの常閉接
点yb1を介して誘導電動機IMに供給されることに
より電気的に運転が継続されるので、前述のエレ
ベーターを静止摩擦力から脱する電力が供給され
るとき慣性による回転エネルギーが急激に減衰す
るのを補償することができ、乗かごCAを救出可
能な階に走行させるまで電動発電機Ｇは慣性によ
り回転し続けることができるので、乗かごCAと
釣り合い錘CWとの釣り合いが平衡状態となつた
場合にも、僅かなバツテリー容量の増加で救出可
能な階まで乗かごCAを電動発電機Ｇの慣性力に
よる回転エネルギーを利用して走行させることが
可能となり、安全に、かつ、確実に乗客の救出を
行なえるエレベーターの停電時自動着床装置を実
現できる。 If a power outage occurs while the car CA is running, the power supply from the commercial power source SA will be cut off, and the commercial power detection relay described above will be deenergized and its normally open contact ya 1 will be deenergized.
and ya 2 are opened, the induction motor IM
At the same time, the supply of drive power to the control circuit 2 is cut off, and the electromagnetic brake coil MB is deenergized by a known circuit (not shown), and the electromagnetic brake MgB is released. The car CA is brought to an emergency stop. and,
When a predetermined period of time has elapsed after the commercial power supply detection relay was deenergized, the above-mentioned time relay is deenergized and its normally closed contacts yb 1 and yb 2 are closed.
If the CA is not stopped at the landing position, the landing position detection relay mentioned above is deenergized , its normally closed contact At the same time, power is supplied to the electromagnetic brake coil MB via the normally closed contact yb2 and the normally closed contact X. When the control circuit 2 is supplied with electric power from the battery B, the control circuit 2 determines the direction of operation using a known circuit based on a load detection signal from the load detection device W that detects the load state of the car CA, and also determines the driving direction of the car by using a known circuit. When the load detection signal from the car CA is a load in which the balance between the car CA and the corresponding counterweight CW is in a balanced state, it is determined that the load is in a balanced load state, and a balanced load determination signal Wt is output. Then, the control circuit 2 controls each field GF of the motor generator G and the motor M based on the determination of the driving direction.
Excitation current is supplied to MF from battery B. On the other hand, as mentioned above, the electromagnetic brake coil
Electricity is supplied to MB from battery B, electromagnetic brake MgB is in operation to release car CA from a stationary state, and immediately after a power outage, induction motor IM
Even if the power supply is cut off, the motor-generator G continues to rotate due to the accumulated rotational energy due to inertia, so the field
When the excitation current is supplied to GF, it causes the motor M to generate a voltage. Now, when electric power is supplied to the elevator in which the car CA and the counterweight CW are in equilibrium, the elevator is released from the static friction force, the rotational energy due to inertia is rapidly attenuated, and the car CA However, the control circuit 2 is now outputting the equilibrium state determination signal Wt, and the DC power from the battery B is being transferred to the inverter. The device IV converts it into AC power, and this converted AC power is supplied to the induction motor IM via the equilibrium state determination signal Wt and the normally closed contact yb 1 of the time relay mentioned above, thereby continuing electrical operation. As a result, it is possible to compensate for the sudden attenuation of the rotational energy due to inertia when electric power is supplied to release the elevator from the static friction force mentioned above, and the electric power is maintained until the car CA is moved to a floor where it can be rescued. Since the generator G can continue to rotate due to inertia, even if the balance between the car CA and the counterweight CW reaches an equilibrium state, a slight increase in battery capacity will allow the car CA to reach the floor where it can be rescued. It becomes possible to run the elevator using the rotational energy generated by the inertial force of the motor generator G, and it is possible to realize an automatic landing device for elevators during a power outage that can safely and reliably rescue passengers.
尚、本実施例にあつては、電動発電機Ｇの慣性
力による回転エネルギーが減衰するのを抑制する
ためバツテリーＢの直流電力をインバータ装置
IVを用いて交流電力に変換し、この交流電力で
誘導電動機IMを回転し続けさせるようにしてい
るが、この実施例に限定されることはなく、電動
発電機Ｇに誘導電動機IMに代えて直流の電動機
を連結してバツテリーＢからの直流電力を上記電
動機に供給し回転エネルギーが減衰されるのを抑
制するようにしても同様の効果が得られると共
に、インバータ装置が不要となるので、設備費を
安価にできる効果がある。 In this embodiment, in order to suppress the attenuation of the rotational energy due to the inertial force of the motor generator G, the DC power of the battery B is transferred to an inverter.
IV is used to convert it into AC power, and this AC power is used to keep the induction motor IM rotating. However, the invention is not limited to this embodiment, and the motor generator G can be used instead of the induction motor IM. A similar effect can be obtained by connecting a DC motor and supplying DC power from battery B to the motor to suppress rotational energy from being attenuated, and since an inverter device is not required, equipment It has the effect of reducing costs.
以上、説明したように、本考案によれば、乗か
ごとそれに対応する釣り合い錘との釣り合いがほ
ぼ平衡状態となつたとき、非常電源により電動発
電機を回転させる電動機に対して電力を供給する
ようにしてあるので、一旦停止されたエレベータ
ーを再起動させる際に、静止摩擦力を脱するのに
必要な電力供給のため慣性力による回転エネルギ
ーが極度に減衰されるのを抑制することができ、
平衡負荷状態のときの慣性力による電動発電機の
回転を救出移動距離まで持続させることが可能と
なり、従つて非常電源の容量を従来の対して僅か
な増加で平衡負荷状態に応じた救出運転を確実に
行なうことができるようになつた。
As explained above, according to the present invention, when the balance between the car and its corresponding counterweight is approximately in equilibrium, the emergency power supply supplies electric power to the electric motor that rotates the motor generator. As a result, when restarting an elevator that has been stopped, it is possible to suppress the rotational energy due to inertial force from being extremely attenuated due to the power supply necessary to overcome the static frictional force. ,
It is now possible to sustain the rotation of the motor-generator due to inertia during a balanced load condition until the rescue travel distance, making it possible to carry out rescue operation in accordance with a balanced load condition with a slight increase in the capacity of the emergency power source compared to the conventional one. Now I can do it reliably.
第１図はエレベーター駆動系の系統図、第２図
は従来方式の回路のブロツク図、第３図は本考案
による制御回路のブロツク図である。
CA……乗かご、CW……釣り合い錘、MgB…
…電磁ブレーキ、MB……電磁ブレーキコイル、
IM……誘導電動機、Ｇ……直流電動発電機、Ｍ
……直流電動機、Ａ……充電器、Ｂ……バツテリ
ー、２……制御回路、GF……直流電動発電機界
磁、MF……直流電動機界磁、Ｓ……シーブ、
SA……商用電源、IV……インバータ装置、Ｗ…
…負荷検出装置、Wt……平衡負荷判別信号、
ya1，ya2……商用電源検出リレーの常開接点、
yb1，yb2……タイムリレーの常閉接点、Ｘ……着
床位置検出リレーの常閉接点。
FIG. 1 is a system diagram of an elevator drive system, FIG. 2 is a block diagram of a conventional circuit, and FIG. 3 is a block diagram of a control circuit according to the present invention. CA...car, CW...counterweight, MgB...
...Electromagnetic brake, MB...Electromagnetic brake coil,
IM...Induction motor, G...DC motor generator, M
...DC motor, A...Charger, B...Battery, 2...Control circuit, GF...DC motor generator field, MF...DC motor field, S...Sheave,
SA...Commercial power supply, IV...Inverter device, W...
...load detection device, Wt...balanced load discrimination signal,
ya 1 , ya 2 ... Normally open contact of commercial power supply detection relay,
yb 1 , yb 2 ... Normally closed contact of time relay, X ... Normally closed contact of landing position detection relay.
Claims (1)
直流電動機、この直流電動機によつて昇降駆動さ
れる乗かごを有するエレベーターにあつて、停電
時に上記発電機及び電動機の各界磁に給電する非
常電源を備え、かつ、停電時乗かご内負荷を検出
しこの乗かごに対応する釣り合い錘の荷重との比
較により上記乗かごの運転方向を運転負担の軽い
方向へ自動的に決定すると共に、停電時に上記発
電機及び電動機の各界磁に対して決定された方向
となるように上記非常電源から給電するようにし
た制御回路とを備え、上記乗かごを上記電動発電
機の回転エネルギーと上記非常電源とにより運転
するようにしたエレベーターの停電時自動着床装
置において、停電時乗かご内負荷を検出しこの乗
かごと対応する釣り合い錘との釣り合いがほぼ平
衡状態となつたとき出力信号を送出する平衡状態
判別回路を上記制御回路に備えると共に、上記出
力信号により上記非常電源の電力を上記発電機を
回転させる電動機に供給し上記発電機の回転力が
極度に減衰するのを抑制する手段を具備したこと
を特徴とするエレベーターの停電時自動着床装
置。 An elevator having a Ward Leonard-connected DC motor generator and a DC motor, and a car that is driven up and down by the DC motor, is equipped with an emergency power supply for supplying power to each field of the generator and motor in the event of a power outage, In addition, the load inside the car is detected during a power outage, and by comparing it with the load of the counterweight corresponding to this car, the operating direction of the car is automatically determined in a direction with a lighter operating burden, and the generator is turned off during a power outage. and a control circuit configured to supply power from the emergency power source in a direction determined for each field of the electric motor, and the car is operated by the rotational energy of the motor generator and the emergency power source. In the automatic flooring device for an elevator during a power outage, an equilibrium state determination circuit detects the load inside the car at the time of a power outage and sends an output signal when the balance between the car and the corresponding counterweight is almost in equilibrium. The control circuit is characterized by comprising means for supplying electric power from the emergency power source to a motor that rotates the generator in accordance with the output signal to suppress the rotational force of the generator from being extremely attenuated. Automatic landing device for elevators during power outages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5187082U JPS58154264U (en) | 1982-04-12 | 1982-04-12 | Automatic landing device in case of elevator power outage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5187082U JPS58154264U (en) | 1982-04-12 | 1982-04-12 | Automatic landing device in case of elevator power outage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58154264U JPS58154264U (en) | 1983-10-15 |
| JPH0111654Y2 true JPH0111654Y2 (en) | 1989-04-05 |
Family
ID=30062578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5187082U Granted JPS58154264U (en) | 1982-04-12 | 1982-04-12 | Automatic landing device in case of elevator power outage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58154264U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519231A (en) * | 1974-06-12 | 1976-01-24 | Western Electric Co | |
| JPS53140749A (en) * | 1977-05-11 | 1978-12-08 | Mitsubishi Electric Corp | Device for operating elevator cage in emergency |
| JPS5713560B2 (en) * | 1974-09-11 | 1982-03-17 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5713560U (en) * | 1980-06-25 | 1982-01-23 |
-
1982
- 1982-04-12 JP JP5187082U patent/JPS58154264U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS519231A (en) * | 1974-06-12 | 1976-01-24 | Western Electric Co | |
| JPS5713560B2 (en) * | 1974-09-11 | 1982-03-17 | ||
| JPS53140749A (en) * | 1977-05-11 | 1978-12-08 | Mitsubishi Electric Corp | Device for operating elevator cage in emergency |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58154264U (en) | 1983-10-15 |
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