JP2003292292A - Electric hoisting and lowering device - Google Patents

Electric hoisting and lowering device

Info

Publication number
JP2003292292A
JP2003292292A JP2002096561A JP2002096561A JP2003292292A JP 2003292292 A JP2003292292 A JP 2003292292A JP 2002096561 A JP2002096561 A JP 2002096561A JP 2002096561 A JP2002096561 A JP 2002096561A JP 2003292292 A JP2003292292 A JP 2003292292A
Authority
JP
Japan
Prior art keywords
hoisting
high speed
light load
load
induction motor
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.)
Pending
Application number
JP2002096561A
Other languages
Japanese (ja)
Inventor
Yutaka Furuya
裕 降矢
Tsunehiro Hatano
恒博 幡野
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.)
Kito KK
Kito Corp
Original Assignee
Kito KK
Kito 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 Kito KK, Kito Corp filed Critical Kito KK
Priority to JP2002096561A priority Critical patent/JP2003292292A/en
Publication of JP2003292292A publication Critical patent/JP2003292292A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric hoisting and lowering device capable of easily setting a parameter for determining load or light load and performing safe hoisting and lowering operation while changing the hoisting and lowering speed to low speed, high speed, and light load and high speed. <P>SOLUTION: This electric hoisting and lowering device is provided with an induction motor 3, an inverter 2 and an operating part 1 having three-stage push button switches 11, 12. An inverter control part changes the frequency of the inverter 2 to operate the induction motor 3 according to low speed, high speed, and light load and high speed commands UL, DL, H, RH based on the operation of the three-stage push button switches of the operating part 1. Only when the command from the operating part 1 is the hoisting light load and high speed command RH, a load or light load state is determined from a current value supplied to the induction motor 3, and in the case of light load, hoisting operation of light load and high speed RH is performed. In the case of the lowering light load and high speed command RH, lowering operation of light load and high speed RH is performed only when determining light load in the hoisting high speed command given immediately before. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は電動チェーンブロッ
クや電動ホイスト等の電動巻上下装置、特に負荷・軽負
荷に対応して巻上下速度を変化させて巻上下運転ができ
る電動巻上下装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hoisting and lowering device such as an electric chain block and an electric hoist, and more particularly to an electric hoisting and lowering device capable of changing the hoisting and lowering speed in response to load and light load. Is.

【0002】[0002]

【従来の技術】インバータ出力で駆動される巻上下用の
誘導電動機を具備し、軽負荷時に、巻上下速度を定格速
度よりも速くする制御が可能な電動巻上下装置がある。
このような電動巻上下装置において、負荷又は軽負荷状
態をインバータから誘導電動機に供給される電流値を用
いて判定するものが知られている(例えば特開平11−
240692号公報参照)。このような判定方法では、
巻上時と巻下時の電流値が異なるため、それぞれ別々に
負荷・軽負荷判定に係るパラメータを設ける必要があ
る。そのため設定するパラメータ数が多く、その設定が
複雑になるという問題がある。
2. Description of the Related Art There is an electric hoisting device which is equipped with an induction motor for hoisting and lowering which is driven by an inverter output, and which is capable of controlling the hoisting speed to be higher than a rated speed when the load is light.
In such an electric hoisting and lowering device, there is known one in which a load or a light load state is determined by using a current value supplied from an inverter to an induction motor (for example, Japanese Patent Laid-Open No. 11-
No. 240692). In such a determination method,
Since the current value during winding is different from that during winding, it is necessary to provide separate parameters for load / light load determination. Therefore, there is a problem that the number of parameters to be set is large and the setting becomes complicated.

【0003】また、電動巻上下装置においては、巻下時
の電流変化は巻上時に比べて少ないなど、正確に負荷状
態を検出することが困難である。その結果、巻上時には
負荷検出にて高速にならないが、巻下時には軽負荷と判
定され高速になってしまい、安全性に欠ける場合があ
る。
Further, in the electric hoisting and lowering device, it is difficult to accurately detect the load state, because the change in current during winding is smaller than that during winding. As a result, the load detection does not increase the speed at the time of winding, but the load is determined to be light at the time of winding, and the speed becomes high, which may be unsafe.

【0004】[0004]

【発明が解決しようとする課題】本発明は上述の点に鑑
みてなされたもので、上記問題点を除去し、負荷・軽負
荷判定のためのパラメータの設定が簡単で、巻上下速度
を低速・高速・軽負荷高速に変化させて且つ安全に巻上
下運転ができる電動巻上下装置を提供することを目的と
する。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. It is possible to eliminate the above-mentioned problems, to easily set parameters for load / light load determination, and to lower the winding vertical speed. -High speed / light load An object of the present invention is to provide an electric hoisting / lowering device that can be safely hoisted up and down by changing to high speed.

【0005】[0005]

【課題を解決するための手段】上記課題を解決するため
請求項1に記載の発明は、巻上・巻下用の誘導電動機、
該誘導電動機に駆動電力を供給するインバータ、該イン
バータを制御するインバータ制御部及び巻上及び巻下用
の低速・高速を指令する2段押ボタンスイッチを有する
操作部を具備し、インバータ制御部は、操作部の2段押
ボタンスイッチの操作による低速・高速指令に応じて、
前記インバータから供給される駆動電力の周波数を変化
させ、前記誘導電動機を運転するように構成し、インバ
ータ制御部は、操作部からの指令が巻上高速指令の場合
のみ前記誘導電動機に供給される電流値から負荷・軽負
荷状態を判定し、軽負荷であった場合に軽負荷高速の巻
上で、また巻下高速指令の場合は直前の巻上高速指令で
軽負荷と判定された場合のみ軽負荷高速の巻下で誘導電
動機を運転することを特徴とする。
In order to solve the above-mentioned problems, the invention according to claim 1 provides an induction motor for hoisting and lowering,
An inverter for supplying drive power to the induction motor, an inverter control unit for controlling the inverter, and an operation unit having a two-step pushbutton switch for instructing low speed and high speed for hoisting and hoisting, and the inverter controller is provided. , In response to low-speed / high-speed commands by operating the two-stage push button switch on the operation unit,
The frequency of the drive power supplied from the inverter is changed to drive the induction motor, and the inverter control unit supplies the induction motor only when the command from the operation unit is the hoisting high speed command. The load / light load state is judged from the current value, and if the load is light, the light load and high speed hoisting is performed, and in the case of the lower hoisting speed command, only when the immediately preceding hoisting high speed command determines the light load. It is characterized by operating the induction motor under light load and high speed unwinding.

【0006】上記のようにインバータ制御部は、操作部
の低速・高速指令に応じて、インバータから供給される
駆動電力の周波数を変化させ、誘導電動機を運転するよ
うに構成し、操作部からの指令が巻上高速指令の場合の
み誘導電動機に供給される電流値から負荷・軽負荷状態
を判定し、軽負荷であった場合に軽負荷高速の巻上で、
また巻下高速指令の場合は直前の巻上高速指令で軽負荷
と判定された場合のみ軽負荷高速の巻下で誘導電動機を
運転するので、操作部の巻上及び巻下用の押ボタンスイ
ッチの1段目の操作では低速、2段目の操作では高速で
運転し、更に巻上用押ボタンスイッチの2段目の操作の
高速指令のときのみ負荷・軽負荷を判断し、軽負荷高速
と判断されたときのみ軽負荷高速の巻上げ運転を行うこ
とになる。また、巻下用押ボタンスイッチの2段目の操
作では、直前の巻上操作で軽負荷と判定された場合のみ
軽負荷高速の巻き下げ運転を行なうことになる。
As described above, the inverter control unit is configured to change the frequency of the drive power supplied from the inverter in accordance with the low speed / high speed command of the operation unit to operate the induction motor, and to operate the induction motor. Only when the command is a hoisting high speed command, determine the load / light load state from the current value supplied to the induction motor, and if the load is light, hoist at a light load high speed,
In the case of a hoisting high-speed command, the induction motor is operated under light-loading high-speed unwinding only when the previous hoisting high-speed command determines that the load is light.Therefore, push-button switches for hoisting and lowering the operating section The first-step operation operates at a low speed, the second-step operation operates at a high speed, and the load / light load is determined only when a high-speed command is issued for the second step of the hoisting pushbutton switch. Only when it is determined that the hoisting operation of light load and high speed is performed. Further, in the operation of the second step of the lowering push-button switch, the light-loading high-speed lowering operation is performed only when it is determined that the light-loading is performed by the immediately preceding winding operation.

【0007】また、請求項2に記載の発明は、巻上・巻
下用の誘導電動機、該誘導電動機に駆動電力を供給する
インバータ、該インバータを制御するインバータ制御部
及び巻上及び巻下用の低速・高速・軽負荷高速を指令す
る3段押ボタンスイッチを有する操作部を具備し、イン
バータ制御部は、操作部の3段押ボタンスイッチの操作
による低速・高速・軽負荷高速指令に応じて、インバー
タから供給される駆動電力の周波数を変化させ、誘導電
動機を運転するように構成し、インバータ制御部は、操
作部からの指令が巻上軽負荷高速指令の場合のみ誘導電
動機に供給される電流値から負荷・軽負荷状態を判定
し、軽負荷であった場合に軽負荷高速の巻上で、また巻
下軽負荷高速指令の場合は直前の巻上軽負荷高速指令で
軽負荷と判定された場合のみ軽負荷高速の巻下で誘導電
動機を運転することを特徴とする。
The invention according to claim 2 is an induction motor for hoisting / winding, an inverter for supplying drive power to the induction motor, an inverter control unit for controlling the inverter, and hoisting / winding. It is equipped with an operating unit that has a three-step pushbutton switch for instructing low speed, high speed, light load and high speed, and the inverter control unit responds to low speed, high speed, light load and high speed commands by operating the three-step pushbutton switch of the operating unit. The inverter control unit is configured to operate the induction motor by changing the frequency of the drive power supplied from the inverter, and the inverter control unit supplies the induction motor only when the command from the operation unit is the hoisting light load high speed command. The load / light load state is judged from the current value of the load, and if the load is light, the light load and high speed hoisting is performed. Was judged Characterized by operating the induction motor case only under winding at light loads faster.

【0008】上記のようにインバータ制御部は、操作部
の低速・高速・軽負荷高速指令に応じて、インバータか
ら供給される駆動電力の周波数を変化させ、誘導電動機
を運転するように構成し、操作部からの指令が巻上軽負
荷高速指令の場合のみ誘導電動機に供給される電流値か
ら負荷・軽負荷状態を判定し、軽負荷であった場合に軽
負荷高速の巻上で、また巻下軽負荷高速指令の場合は直
前の巻上軽負荷高速指令で軽負荷と判定された場合のみ
軽負荷高速の巻下で誘導電動機を運転するので、操作部
の巻上及び巻下用の押ボタンスイッチの1段目の操作で
は低速、2段目の操作では高速で運転し、3段目の操作
では、巻上用押ボタンスイッチのときのみ負荷・軽負荷
を判断し、軽負荷高速と判断されたときのみ軽負荷高速
の巻上げ運転を行うことになる。また、巻下用押ボタン
スイッチの3段目の操作では、直前の巻上操作で軽負荷
と判定された場合のみ軽負荷高速の巻き下げ運転を行な
うことになる。それ以外の場合は負荷状態とみなすか
ら、巻下用の押ボタンスイッチの3段目の操作でも高速
の巻下げ運転を行なう。
As described above, the inverter control unit is configured to operate the induction motor by changing the frequency of the drive power supplied from the inverter according to the low speed / high speed / light load high speed command of the operating unit. Only when the command from the operating unit is a hoisting light load high speed command, the load / light load state is judged from the current value supplied to the induction motor. In the case of the lower light load high speed command, the induction motor is driven under light load high speed only when the previous light load high speed command determines that the load is light. The first step of the button switch operates at low speed, the second step operates at high speed, and the third step operation determines the load / light load only when using the hoisting pushbutton switch, thus Only when it is judged, light load and high speed hoisting operation is performed. It will be. In addition, in the operation of the third step of the lowering push-button switch, the light-loading and high-speed lowering operation is performed only when it is determined that the load is light in the immediately preceding winding operation. In other cases, since it is considered to be in the loaded state, the high-speed unwinding operation is performed even by operating the third step of the unwinding push button switch.

【0009】[0009]

【発明の実施の形態】以下、本発明の実施の形態例を図
面に基いて説明する。図1は本発明に係る電動巻上下装
置のシステム構成例を示す図である。図示するように本
電動巻上下装置は、操作部1とインバータ2と巻上下用
の誘導電動機3を具備する。後に詳述するように、操作
部1からの巻上及び巻下の低速・高速・軽負荷高速指令
に応じて、インバータ2は誘導電動機3に供給する駆動
電力の周波数を低速・高速・軽負荷高速用に変化させ、
巻上及び巻下の低速・高速・軽負荷高速運転を行なう。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a system configuration example of an electric hoisting and lowering device according to the present invention. As shown in the figure, the electric hoisting and lowering device includes an operation unit 1, an inverter 2, and an induction motor 3 for hoisting and lowering. As will be described later in detail, the inverter 2 changes the frequency of the drive power supplied to the induction motor 3 to the low speed / high speed / light load in response to the low speed / high speed / light load high speed command from the operation unit 1. Change for high speed,
Performs low speed / high speed / light load high speed operation of hoisting and hoisting.

【0010】操作部1は巻上用押ボタンスイッチ11、
巻下用押ボタンスイッチ12及びリセット用押ボタンス
イッチ13を具備する。巻上用押ボタンスイッチ11は
3段操作の押ボタンスイッチで、1段目の操作で接点1
1−1がONし巻上低速指令信号ULを、2段目の操作
で接点11−2がONし高速指令信号Hを、3段目の操
作で接点11−3がONし軽負荷高速指令信号RHを夫
々インバータ2に出力するようになっている。また、巻
下用押ボタンスイッチ12は3段操作の押ボタンスイッ
チで、1段目の操作で接点12−1がONし巻下低速指
令信号DLを、2段目の操作で接点12−2がONし高
速指令信号Hを、3段目の操作で接点12−3がONし
軽負荷高速指令信号RHを夫々インバータ2に出力する
ようになっている。リセット用押ボタンスイッチ13は
常閉の接点13−1を具備する1段操作の押ボタンスイ
ッチで、1段操作で接点13−1がOFFされリセット
指令信号REをインバータ2に出力するようになってい
る。
The operation unit 1 includes a hoisting push button switch 11,
It has a lowering push button switch 12 and a reset push button switch 13. The hoisting push-button switch 11 is a push-button switch that is operated in three steps.
1-1 turns on and the hoisting low speed command signal UL is turned on, the contact 11-2 is turned on by the operation of the second step and the high speed command signal H is turned on, and contact 11-3 is turned on by the operation of the third step. The signals RH are output to the inverter 2, respectively. Further, the unwinding push button switch 12 is a three-step operation push button switch, and the contact 12-1 is turned on by the operation of the first step to turn on the unwinding low speed command signal DL and the contact 12-2 by the operation of the second step. Is turned on to output the high-speed command signal H, and the contact 12-3 is turned on by the operation of the third stage to output the light load high-speed command signal RH to the inverter 2, respectively. The reset push button switch 13 is a one-step operation push button switch having a normally closed contact 13-1, and the contact 13-1 is turned off by the one-step operation to output a reset command signal RE to the inverter 2. ing.

【0011】なお、巻上用押ボタンスイッチ11及び巻
下用押ボタンスイッチ12は2段目の操作では接点11
−1、12−1はONを継続、3段目の操作では接点1
1−1、11−2、12−1、12−2はONを継続す
る。従って、インバータは「巻上」か「巻下」かの判断
は接点11−1、12−1のONによる信号、即ち巻上
低速指令信号UL、巻下低速指令信号DLで行なう。
The hoisting push-button switch 11 and the hoisting-down push button switch 12 have contact points 11 in the second-stage operation.
-1, 12-1 keeps ON, contact 1 at the 3rd step
1-1, 11-2, 12-1, 12-2 continue to be ON. Therefore, the inverter determines whether it is "winding up" or "winding down" by the signal generated by turning on the contacts 11-1 and 12-1, that is, the low winding command signal UL and the low winding command signal DL.

【0012】インバータ2は交流電源ACから3相
(R、S、T)の交流電源が入力されるようになってい
る。また、誘導電動機3にはインバータ2から3相
(U、V、W)の駆動電力が供給されるようになってい
る。
The inverter 2 is adapted to receive a three-phase (R, S, T) AC power source from the AC power source AC. Further, the induction motor 3 is supplied with drive power of three phases (U, V, W) from the inverter 2.

【0013】インバータ2は、図2に示すように主回路
(インバータ本体)15、制御回路16、インタフェー
ス17及びメモリ18から構成される。インタフェース
17には操作部1からリセット指令信号RE、巻上低速
指令信号UL、巻下低速指令信号DL、高速指令信号H
及び軽負荷高速指令信号RHが入力されるようになって
いる。ここで制御回路16、インタフェース17及びメ
モリ18で主回路(インバータ本体)15を制御するイ
ンバータ制御部を構成している。
As shown in FIG. 2, the inverter 2 is composed of a main circuit (inverter body) 15, a control circuit 16, an interface 17 and a memory 18. The interface 17 includes a reset command signal RE, a hoisting low speed command signal UL, a hoisting low speed command signal DL, and a high speed command signal H from the operation unit 1.
And a light load high speed command signal RH is input. Here, the control circuit 16, the interface 17, and the memory 18 constitute an inverter control unit that controls the main circuit (inverter main body) 15.

【0014】制御回路16は、操作部1からの巻上低速
指令信号UL、巻下低速指令信号DL、高速指令信号H
に応じて、主回路15から誘導電動機3に供給される駆
動電力の周波数を変化させ、誘導電動機3をそれぞれに
応じた速度で運転する。そして操作部1から巻上の軽負
荷高速指令信号RHが入力された場合のみ誘導電動機3
に供給される電流値(この電流値は図示しない電流検出
器で検出し、制御回路16に入力される)から負荷・軽
負荷状態を判定し、軽負荷であった場合に、該巻上の軽
負荷高速指令に応じて、誘導電動機3に供給する駆動電
力の周波数を変化させ軽負荷高速の巻上運転を行なう。
また、操作部1から巻下の軽負荷高速指令信号RHが入
力された場合は、直前の巻上動作で軽負荷と判定された
場合のみ、軽負荷高速巻下運転を行なう。
The control circuit 16 includes a hoisting low speed command signal UL, a hoisting low speed command signal DL, and a high speed command signal H from the operation unit 1.
In accordance with the above, the frequency of the drive power supplied from the main circuit 15 to the induction motor 3 is changed, and the induction motor 3 is operated at the speed corresponding to each. The induction motor 3 is operated only when the winding light load high speed command signal RH is input from the operation unit 1.
The load / light load state is determined from the current value supplied to (the current value is detected by a current detector (not shown) and input to the control circuit 16). In accordance with the light load high speed command, the frequency of the drive power supplied to the induction motor 3 is changed to perform the light load high speed hoisting operation.
Further, when the unwinding light load high-speed command signal RH is input from the operation unit 1, the light load high-speed unwinding operation is performed only when the immediately preceding hoisting operation determines a light load.

【0015】図3は上記制御回路16が行う巻上下運転
の処理フローを示す図である。ここでは、巻上下運転を
電動のホイスト操作を例に説明するが、電動のチェーン
ブロック等の電動巻上下装置でも同様である。また、こ
の処理フローは制御回路16のCPU(図示せず)がメ
モリ18に格納されているプログラムを実行することに
より行なう。
FIG. 3 is a diagram showing a processing flow of the winding up / down operation performed by the control circuit 16. Here, the hoisting and hoisting operation will be described by taking an electric hoist operation as an example, but the same goes for an electric hoisting device such as an electric chain block. Further, this processing flow is performed by the CPU (not shown) of the control circuit 16 executing the program stored in the memory 18.

【0016】先ずステップST1において、巻上U操作
であるか否かを判定し(この判定は巻上用押ボタンスイ
ッチ11の接点11−1がONし、巻上低速指令信号U
Lが入力されていることで判定できる)、巻上U操作で
あったら、押ボタンスイッチ11の1段目の接点11−
1がONされ巻上低速指令信号ULが入力されている場
合は(ステップST2)、誘導電動機3を低速巻上運転
する(ステップST3)。
First, in step ST1, it is judged whether or not the hoisting U operation is performed (this judgment is made by turning on the contact point 11-1 of the hoisting push button switch 11 and by hoisting the low speed command signal U).
If it is a hoisting U operation, it can be determined by L being input).
When 1 is turned on and the hoisting low speed command signal UL is input (step ST2), the induction motor 3 is operated at low speed hoisting (step ST3).

【0017】巻上用押ボタンスイッチ11の2段目の接
点11−2がONされ高速指令信号Hが入力されている
場合は(ステップST4)、誘導電動機3を高速巻上運
転とする(ステップST5)。
When the second-stage contact 11-2 of the hoisting push-button switch 11 is turned on and the high-speed command signal H is input (step ST4), the induction motor 3 is set to high-speed hoisting operation (step ST4). ST5).

【0018】巻上用押ボタンスイッチ11の3段目の接
点11−3がONされ軽負荷高速指令信号RHが入力さ
れている場合は(ステップST6)、接点11−2が継
続してONされているので、高速巻上運転がある一定時
間行われ、続いて誘導電動機3に供給される電流値から
軽負荷状態であるか否かを判定し(ステップST7)、
軽負荷状態で無かったら高速の巻上運転とし高速巻上運
転を継続し(ステップST5)、軽負荷状態であったら
軽負荷高速ラッチし(ステップST8)、誘導電動機3
を軽負荷高速巻上運転する(ステップST9)。なお、
ステップST1における巻上U操作がされると、初期値
の「負荷」状態となるようにプログラムされている。
When the third-stage contact 11-3 of the hoisting push-button switch 11 is turned on and the light load high-speed command signal RH is input (step ST6), the contact 11-2 is continuously turned on. Therefore, the high-speed hoisting operation is performed for a certain period of time, and then it is determined from the current value supplied to the induction motor 3 whether or not it is in a light load state (step ST7).
If it is not in a light load state, the hoisting operation is performed at high speed and the high speed hoisting operation is continued (step ST5). If it is in a light load state, light load high speed latching is performed (step ST8).
Is operated at light load and high speed (step ST9). In addition,
When the hoisting U operation in step ST1 is performed, the initial value "load" state is programmed.

【0019】ステップST10において、巻下D操作で
あるか否かを判定し(この判定は巻下用押ボタンスイッ
チ12の接点12−1がONし、巻下低速指令信号DL
が入力されていることで判定できる)、巻下D操作であ
ったら、押ボタンスイッチ12の1段目の接点12−1
がONされ巻下低速指令信号DLが入力されている場合
は(ステップST11)、誘導電動機3を低速巻下運転
とする(ステップST12)。
At step ST10, it is judged whether or not the operation is the unwinding D operation (this judgment is made by turning on the contact 12-1 of the unwinding pushbutton switch 12 to determine the unwinding low speed command signal DL.
Can be determined by the input), and if it is the lowering D operation, the first contact 12-1 of the push button switch 12
When is turned on and the low-speed unwinding command signal DL is input (step ST11), the induction motor 3 is set to the low-speed unwinding operation (step ST12).

【0020】巻下用押ボタンスイッチ12の2段目の接
点12−2がONされ高速指令信号Hが入力されている
場合は(ステップST13)、誘導電動機3を高速巻下
運転とする(ステップST14)。
When the second contact 12-2 of the unwinding push button switch 12 is turned on and the high speed command signal H is input (step ST13), the induction motor 3 is set to high speed unwinding operation (step ST13). ST14).

【0021】巻下用押ボタンスイッチ12の3段目の接
点12−3がONされ軽負荷高速指令信号RHが入力さ
れている場合は(ステップST15)、軽負荷高速ラッ
チ状態であるか否かを判断し(ステップST16)、軽
負荷高速ラッチ状態で無かったら高速巻下運転とし(ス
テップST14)、軽負荷高速ラッチ状態であったら誘
導電動機3を軽負荷高速巻下運転する(ステップST1
7)。また、巻下用押ボタンスイッチ12の3段目の接
点12−3がONされる前に巻上U操作が行なわれた場
合は、前述したように軽負荷高速ラッチ状態が初期化さ
れ、該軽負荷高速ラッチがクリアされる。
When the third-stage contact 12-3 of the lowering push-button switch 12 is turned on and the light load high speed command signal RH is input (step ST15), it is determined whether the light load high speed latch state is established. (Step ST16), if it is not in the light load high-speed latch state, the high-speed unwinding operation is performed (step ST14), and if it is in the light load high-speed latching state, the induction motor 3 is operated in the light-load high-speed unwinding operation (step ST1).
7). If the hoisting U operation is performed before the third contact 12-3 of the lowering push-button switch 12 is turned on, the light load high-speed latch state is initialized as described above, The light load high speed latch is cleared.

【0022】上記のように制御回路16、操作部1から
の指令信号が巻上軽負荷高速指令信号RHの場合のみ誘
導電動機3に供給される電流値から負荷か軽負荷状態を
判定するので、判定のためのパラメータ数を減らすこと
ができ、パラメータの設定が簡便且つ確実に行なえる。
また、誘導電動機3に供給される電流値による負荷状態
の判定が巻上時に安定的にできるので、従来例では巻下
時に起り得た、荷を吊っているのに誤って軽負荷と判断
し軽負荷高速の巻下運転をするということがなくなり,
安全に作業を行うことができる。また、初期値を「負
荷」状態としておくことで、電源遮断時に備えてメモリ
18を不揮発性メモリにすることやメモリ18をバック
アップするためのバックアップ電源を設ける必要がな
い。
As described above, the load or light load state is determined from the current value supplied to the induction motor 3 only when the command signal from the control circuit 16 and the operating section 1 is the hoisting light load high speed command signal RH. The number of parameters for determination can be reduced, and parameters can be set easily and surely.
Further, since the load state can be stably determined by the current value supplied to the induction motor 3 at the time of hoisting, in the conventional example, it is erroneously determined to be a light load even if the load is suspended, which may occur at the time of hoisting. Light load, high speed unwinding operation is no longer required,
You can work safely. In addition, by setting the initial value to the “load” state, it is not necessary to make the memory 18 a non-volatile memory or to provide a backup power supply for backing up the memory 18 in case of power shutdown.

【0023】図4は操作部1の外観構成を示す図であ
り、図4(a)は正面図、図4(b)は側面図である。
操作部1はケーシング1−1の正面に、巻上用押ボタン
スイッチ11の押ボタン11a、巻下用押ボタンスイッ
チ12の押ボタン12a及びリセット用押ボタンスイッ
チ13の押ボタン13aを配設した構成である。各押ボ
タンスイッチは図1に示すような接点の構成を有し、各
接点から出力される巻上低速指令信号UL、巻下低速指
令信号DL、高速指令信号H、軽負荷高速指令信号RH
及びリセット指令信号REを出力するための信号線は、
ケーブル1−2内を通って図示しない電動巻上下装置本
体のインバータ2に接続されている。
4A and 4B are views showing the external configuration of the operation unit 1, FIG. 4A being a front view and FIG. 4B being a side view.
The operation unit 1 is provided with a push button 11a of a hoisting push button switch 11, a push button 12a of a hoisting push button switch 12, and a push button 13a of a reset push button switch 13 on the front surface of a casing 1-1. It is a composition. Each push button switch has a contact structure as shown in FIG. 1, and a hoisting low speed command signal UL, a hoisting low speed command signal DL, a high speed command signal H, and a light load high speed command signal RH output from each contact.
And the signal line for outputting the reset command signal RE is
It passes through the inside of the cable 1-2 and is connected to the inverter 2 of the main body of the electric hoisting and lowering device (not shown).

【0024】上記構成の操作部1において、押ボタン1
1aを1段、2段、3段と押すことにより巻上操作を、
押ボタン12aを1段、2段、3段と押すことにより巻
下操作を、押ボタン13aを押すことによりリセット操
作をそれぞれ行なう。
In the operation unit 1 having the above structure, the push button 1
By pushing 1a 1st step, 2nd step, 3rd step
By pushing the push button 12a in the first, second, and third stages, the lowering operation is performed, and by pushing the push button 13a, the reset operation is performed.

【0025】なお、上記例では、操作部は巻上及び巻下
用の押ボタンスイッチ11、12を有し、操作部1から
巻上低速指令信号UL、巻下低速指令信号DL、高速指
令信号H、軽負荷高速指令信号RHを出力し、制御回路
16は、操作部1からの指令が巻上U操作の軽負荷高速
指令信号RHの場合のみ誘導電動機3に供給される電流
値から負荷・軽負荷状態を判定し、軽負荷であった場合
に軽負荷高速の巻上で、また巻下D操作の軽負荷高速指
令信号RHの場合は直前の巻上高速指令で軽負荷と判定
された場合のみ軽負荷高速の巻下で誘導電動機3を運転
する構成例を示したがこれに限定されるものではなく、
操作部1に2段操作の巻上及び巻下用の押ボタンスイッ
チを設け、下記のようにしてもよい。
In the above example, the operating section has push-button switches 11 and 12 for hoisting and lowering, and the hoisting low speed command signal UL, the hoisting low speed command signal DL, and the high speed command signal from the operating section 1. H, a light load high speed command signal RH is output, and the control circuit 16 loads the current from the current value supplied to the induction motor 3 only when the command from the operation unit 1 is the light load high speed command signal RH for hoisting U operation. The light load state is determined. If the load is light, it is determined to be a light load at high speed hoisting, and in the case of the light load high speed command signal RH of the lowering D operation, it is determined to be a light load at the immediately preceding hoisting high speed command. Only in the case, the configuration example in which the induction motor 3 is operated under light load and high speed unwinding is shown, but the invention is not limited to this.
The operation unit 1 may be provided with push-button switches for two-step operation of hoisting and hoisting, and may be configured as follows.

【0026】制御回路16は、操作部1からの指令が巻
上U操作の高速指令信号Hが入力された場合のみ誘導電
動機3に供給される電流値から負荷・軽負荷状態を判定
し、軽負荷であった場合に軽負荷高速の巻上で誘導電動
機を運転し、また巻下D操作の高速指令信号Hが入力さ
れた場合は直前の巻上U操作の高速指令信号Hで軽負荷
と判定された場合のみ軽負荷高速の巻下で誘導電動機3
を運転する。
The control circuit 16 determines the load / light load state from the current value supplied to the induction motor 3 only when the command from the operation section 1 is the high speed command signal H for the hoisting U operation, and the light load condition is determined. If the load is a load, the induction motor is driven at high speed with a light load, and if the high speed command signal H for the hoisting D operation is input, the high speed command signal H for the immediately preceding hoisting U operation causes a light load. Induction motor 3 with light load and high speed unwinding only when judged
To drive.

【0027】上記のように、制御回路16は、操作部1
からの指令が巻上U操作の高速指令信号Hの場合のみ誘
導電動機3に供給される電流値から負荷・軽負荷状態を
判定し、軽負荷であった場合に軽負荷高速の巻上で誘導
電動機3を運転し、また巻下D操作の高速指令信号Hの
場合は直前の巻上高速指令で軽負荷と判定された場合の
み軽負荷高速の巻下で誘導電動機3を運転するので、操
作部1の巻上及び巻下用の押ボタンスイッチの1段目の
操作では低速、2段目の操作では高速で運転し、更に巻
上用押ボタンスイッチの2段目の操作の高速指令のとき
のみ負荷・軽負荷を判断し、軽負荷高速と判断されたと
きのみ軽負荷高速の巻上げ運転を行うことになる。ま
た、巻下用押ボタンスイッチの2段目の操作では、直前
の巻上操作で軽負荷と判定された場合のみ軽負荷高速の
巻き下げ運転を行なうことになる。
As described above, the control circuit 16 includes the operation unit 1
The load / light load state is determined from the current value supplied to the induction motor 3 only when the command from is the high-speed command signal H for the hoisting U operation. When the electric motor 3 is operated, and in the case of the high speed command signal H for the hoisting D operation, the induction motor 3 is operated under the light load high speed only when the preceding hoisting high speed command determines a light load. The first step operation of the hoisting and lowering push-button switches of section 1 operates at a low speed at the second step operation, and the second step operation of the hoisting push-button switch operates at a high speed. Only when the load / light load is determined, the light load / high speed hoisting operation is performed only when the light load / high speed is determined. Further, in the operation of the second step of the lowering push-button switch, the light-loading high-speed lowering operation is performed only when it is determined that the light-loading is performed by the immediately preceding winding operation.

【0028】[0028]

【発明の効果】以上説明したように、請求項1又は請求
項2に記載の発明によれば、インバータ制御部は、操作
部からの指令が巻上高速指令又は巻上軽負荷高速指令の
場合のみ誘導電動機に供給される電流値から負荷・軽負
荷状態を判定し、軽負荷であった場合に軽負荷高速の巻
上で、また巻下軽負荷高速指令の場合は直前の巻上高速
指令又は巻上軽負荷高速指令で軽負荷と判定された場合
のみ軽負荷高速の巻下で誘導電動機を運転するので、下
記のような優れた効果が得られる。
As described above, according to the present invention as set forth in claim 1 or 2, when the command from the operating unit is the hoisting high speed command or the hoisting light load high speed command, the inverter control unit is operated. Only the current value supplied to the induction motor is used to determine the load / light load state.When the load is light, the light load high speed hoisting is performed.When the light load high speed command is issued, the immediately preceding hoisting high speed command is issued. Alternatively, the induction motor is driven under light load and high speed only when it is determined by the hoisting light load high speed command that the load is light, so that the following excellent effects are obtained.

【0029】(1)負荷か軽負荷状態を判定するための
パラメータ数を減らすことができ、パラメータの設定が
簡便且つ確実に行なえる。
(1) The number of parameters for determining the load or light load state can be reduced, and the parameters can be set easily and reliably.

【0030】(2)誘導電動機に供給される電流値によ
る負荷状態の判定が巻上時に安定的にできるので、従来
例では巻下時に起り得た、荷を吊っているのに誤って軽
負荷と判断し軽負荷高速運転するということがなくな
り,安全に作業を行うことができる。
(2) Since the load state can be determined stably by the current value supplied to the induction motor during hoisting, in the conventional example, a light load is erroneously generated while hoisting a load, which may occur during hoisting. It is no longer necessary to operate at light load and high speed, and it is possible to work safely.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る電動巻上下装置のシステム構成を
示す図である。
FIG. 1 is a diagram showing a system configuration of an electric hoisting and lowering device according to the present invention.

【図2】インバータの構成を示す図である。FIG. 2 is a diagram showing a configuration of an inverter.

【図3】本発明に係る電動巻上下装置の巻上下運転の処
理フローを示す図である。
FIG. 3 is a diagram showing a processing flow of a hoisting and lowering operation of the electric hoisting and lowering device according to the present invention.

【図4】本発明に係る電動巻上下装置の操作部の外観構
成を示す図である。
FIG. 4 is a diagram showing an external configuration of an operation unit of the electric hoisting and lowering device according to the present invention.

【符号の説明】[Explanation of symbols]

1 操作部 2 インバータ 3 誘導電動機 11 巻上用押ボタンスイッチ 12 巻下用押ボタンスイッチ 13 リセット用押ボタンスイッチ 15 主回路(インバータ本体) 16 制御回路 17 インタフェース 18 メモリ 1 Operation part 2 inverter 3 induction motor 11 Winding pushbutton switch 12 Push-down switch for unwinding 13 Pushbutton switch for reset 15 Main circuit (Inverter body) 16 Control circuit 17 Interface 18 memory

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 巻上・巻下用の誘導電動機、該誘導電動
機に駆動電力を供給するインバータ、該インバータを制
御するインバータ制御部及び巻上及び巻下用の低速・高
速を指令する2段押ボタンスイッチを有する操作部を具
備し、前記インバータ制御部は、前記操作部の2段押ボ
タンスイッチの操作による低速・高速指令に応じて、前
記インバータから供給される駆動電力の周波数を変化さ
せ、前記誘導電動機を運転するように構成し、 前記インバータ制御部は、前記操作部からの指令が巻上
高速指令の場合のみ前記誘導電動機に供給される電流値
から負荷・軽負荷状態を判定し、軽負荷であった場合に
軽負荷高速の巻上で、また巻下高速指令の場合は直前の
巻上高速指令で軽負荷と判定された場合のみ軽負荷高速
の巻下で誘導電動機を運転することを特徴とする電動巻
上下装置。
1. An induction motor for hoisting / winding, an inverter for supplying drive power to the induction motor, an inverter control unit for controlling the inverter, and two stages for instructing low speed / high speed for hoisting and lowering. The inverter control unit changes the frequency of the drive power supplied from the inverter according to a low speed / high speed command by operating the two-stage push button switch of the operation unit. The induction motor is configured to operate, and the inverter control unit determines a load / light load state from a current value supplied to the induction motor only when a command from the operation unit is a hoisting high speed command. Operates the induction motor under light-load high-speed unwinding only if the light-load high-speed hoisting occurs if the load is light, and if the hoisting high-speed command immediately precedes the light-load high-speed command Electric winding up and down apparatus according to claim Rukoto.
【請求項2】 巻上・巻下用の誘導電動機、該誘導電動
機に駆動電力を供給するインバータ、該インバータを制
御するインバータ制御部及び巻上及び巻下用の低速・高
速・軽負荷高速を指令する3段押ボタンスイッチを有す
る操作部を具備し、前記インバータ制御部は、前記操作
部の3段押ボタンスイッチの操作による低速・高速・軽
負荷高速指令に応じて、前記インバータから供給される
駆動電力の周波数を変化させ、前記誘導電動機を運転す
るように構成し、 前記インバータ制御部は、前記操作部からの指令が巻上
軽負荷高速指令の場合のみ前記誘導電動機に供給される
電流値から負荷・軽負荷状態を判定し、軽負荷であった
場合に軽負荷高速の巻上で、また巻下軽負荷高速指令の
場合は直前の巻上軽負荷高速指令で軽負荷と判定された
場合のみ軽負荷高速の巻下で誘導電動機を運転すること
を特徴とする電動巻上下装置。
2. An induction motor for hoisting / winding, an inverter for supplying drive power to the induction motor, an inverter control unit for controlling the inverter, and a low speed / high speed / light load high speed for hoisting / winding. The inverter control unit is provided with the operation unit having a three-stage push button switch for instructing, and the inverter control unit is supplied from the inverter in response to a low speed / high speed / light load high speed command by operation of the three-stage push button switch of the operation unit. It is configured to change the frequency of driving power to drive the induction motor, and the inverter control unit supplies the current to the induction motor only when the command from the operation unit is a hoisting light load high speed command. The load / light load state is determined from the values, and if the load is light, it is determined as light load and high speed hoisting, and in the case of a lower light load and high speed command, it is determined as the light load by the previous hoisting light load and high speed command. Was If only the electric winding up and down apparatus characterized by operating the induction motor in the winding of a light load at high speed.
JP2002096561A 2002-03-29 2002-03-29 Electric hoisting and lowering device Pending JP2003292292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002096561A JP2003292292A (en) 2002-03-29 2002-03-29 Electric hoisting and lowering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002096561A JP2003292292A (en) 2002-03-29 2002-03-29 Electric hoisting and lowering device

Publications (1)

Publication Number Publication Date
JP2003292292A true JP2003292292A (en) 2003-10-15

Family

ID=29239554

Family Applications (1)

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JP2002096561A Pending JP2003292292A (en) 2002-03-29 2002-03-29 Electric hoisting and lowering device

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JP (1) JP2003292292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200447879Y1 (en) * 2008-01-23 2010-02-26 주식회사 대산이노텍 Non contact interface apparatus for hoist

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200447879Y1 (en) * 2008-01-23 2010-02-26 주식회사 대산이노텍 Non contact interface apparatus for hoist

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