JPH0712897B2 - Hydraulic elevator - Google Patents
Hydraulic elevatorInfo
- Publication number
- JPH0712897B2 JPH0712897B2 JP1116704A JP11670489A JPH0712897B2 JP H0712897 B2 JPH0712897 B2 JP H0712897B2 JP 1116704 A JP1116704 A JP 1116704A JP 11670489 A JP11670489 A JP 11670489A JP H0712897 B2 JPH0712897 B2 JP H0712897B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- hydraulic
- valve
- hydraulic pump
- electric 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/04—Control systems without regulation, i.e. without retroactive action hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Types And Forms Of Lifts (AREA)
- Elevator Control (AREA)
- Fluid-Pressure Circuits (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は，油圧ポンプを電動機で駆動して下降動作を
制御する油圧エレベータに関する。Description: TECHNICAL FIELD The present invention relates to a hydraulic elevator that drives a hydraulic pump with an electric motor to control a lowering operation.
第３図は，例えば特開昭57−98477号公報に示されたも
のに類似した従来の油圧エレベータを示す概念図であ
る。FIG. 3 is a conceptual diagram showing a conventional hydraulic elevator similar to that shown in, for example, JP-A-57-98477.
図中，（１）は油圧ジヤツキ（２）に支持されたかご，
（３）は電動機（４）によつて駆動される油圧ポンプ
で，油圧ジヤツキ（２）に連通した管路に設けられてい
る。（５）は油圧ジヤツキ（２）と油圧ポンプ（３）の
間の管路に設けられた開閉弁，（６）は開閉弁（５）と
油圧ポンプ（３）の間の管路に設けられたリリーフ弁，
（７）は油槽である。In the figure, (1) is a basket supported by the hydraulic jack (2),
(3) is a hydraulic pump driven by an electric motor (4), and is provided in a pipe line communicating with the hydraulic jack (2). (5) is an opening / closing valve provided in the conduit between the hydraulic jack (2) and the hydraulic pump (3), and (6) is provided in the conduit between the opening / closing valve (5) and the hydraulic pump (3). Relief valve,
(7) is an oil tank.
従来の油圧エレベータは上記のように構成され，かご
（１）を上昇させる場合には電動機（４）が付勢される
とともに，開閉弁（５）が開放され，油圧ポンプ（３）
により圧油が油圧ジヤツキ（２）に圧送される。そして
電動機（４）の回転が可変電圧可変周波数制御されて油
圧ポンプ（３）の吐出流量を変化させて，かご（１）が
滑らかに加速，減速するように運転される。またかご
（１）を下降させる場合にも，開閉弁（５）を開放して
油圧ジヤツキ（２）から排出される圧油が次のように制
御される。すなわち，電動機（４）により油圧ポンプ
（３）を駆動するとともに電動機（４）の回転が制御さ
れて吐出流量を変化させて，かご（１）が滑らかに加
速，減速するように運転される。The conventional hydraulic elevator is configured as described above, and when raising the car (1), the electric motor (4) is energized, the on-off valve (5) is opened, and the hydraulic pump (3) is opened.
As a result, the pressure oil is pumped to the hydraulic jack (2). The rotation of the electric motor (4) is subjected to variable voltage variable frequency control to change the discharge flow rate of the hydraulic pump (3), and the car (1) is operated so as to smoothly accelerate and decelerate. Also when the car (1) is lowered, the on-off valve (5) is opened and the pressure oil discharged from the hydraulic jack (2) is controlled as follows. That is, the hydraulic pump (3) is driven by the electric motor (4), the rotation of the electric motor (4) is controlled to change the discharge flow rate, and the car (1) is operated so as to smoothly accelerate and decelerate.
上記のような従来の油圧エレベータにおいて，かご
（１）の下降運転中，又はかご（１）の停止中に，なん
らかの故障によつて，開閉弁（５）が閉じた状態で，油
圧ジヤツキ（２）の圧油を排出する方向へ油圧ポンプ
（３）が駆動される事態の発生が考えられる。このよう
な異常時には開閉弁（５）と油圧ポンプ（３）の間の管
路が負圧となり，油圧ポンプ（３）と関連した管路内に
キヤビテーシヨンが発生する。このため異常な振動が起
き機器が破損したり，油圧ポンプ（３）等の摺動部に油
膜切れが発生して焼付きを生じたりするという問題点が
あつた。In the conventional hydraulic elevator as described above, the hydraulic jack (2) is closed while the opening / closing valve (5) is closed due to some failure while the car (1) is descending or the car (1) is stopped. It is conceivable that the hydraulic pump (3) is driven in the direction in which the pressure oil of (1) is discharged. When such an abnormality occurs, a negative pressure is applied to the pipeline between the on-off valve (5) and the hydraulic pump (3), causing a cavitation in the pipeline associated with the hydraulic pump (3). As a result, there are problems that abnormal vibration may occur and the equipment may be damaged, or the sliding part of the hydraulic pump (3) or the like may have an oil film shortage and seizure.
この発明は，かかる問題点を解決するためになされたも
のであり，管路の負圧発生に起因する二次的故障を未然
に防止する油圧エレベータを得ることを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to obtain a hydraulic elevator that prevents a secondary failure due to the generation of negative pressure in a pipeline.
この発明にかかわる油圧エレベータ装置においては，開
閉弁と油圧ポンプ間の管路に圧力検出器が設けられる。
また，この圧力検出器の動作を介して付勢される異常制
御装置が設けられる。In the hydraulic elevator apparatus according to the present invention, the pressure detector is provided in the pipeline between the on-off valve and the hydraulic pump.
An abnormal control device is provided which is energized through the operation of the pressure detector.
この発明にかかわる油圧エレベータにおいては，開閉弁
と油圧ポンプ間の管路の圧力が所定値以下となつたとき
の圧力検出器の動作を介して異常制御装置を動作させて
油圧ポンプの電動機が消勢される。In the hydraulic elevator according to the present invention, the abnormality control device is operated via the operation of the pressure detector when the pressure in the pipeline between the on-off valve and the hydraulic pump becomes equal to or lower than a predetermined value, and the electric motor of the hydraulic pump is turned off. Energized.
第１図及び第２図はこの発明の一実施例を示す図で，図
中，第３図は同符号は同一部分を示し，（８）は開閉弁
（５）と油圧ポンプ（３）の間の管路に設けられた圧力
検出器で，（8a）はこれの常開接点，（９）は下降運転
指令リレーの常開接点，（10）は圧力リレーで，（10
a）はこれの常閉接点，（11）は圧力リレー（10）を主
体とする異常制御装置である。FIGS. 1 and 2 are views showing an embodiment of the present invention, in which FIG. 3 shows the same parts in FIG. 3, and (8) shows an on-off valve (5) and a hydraulic pump (3). (8a) is a normally open contact of this pressure detector, (9) is a normally open contact of the descending operation command relay, (10) is a pressure relay, and (10) is a pressure relay.
a) is a normally closed contact of this, and (11) is an abnormal control device mainly composed of a pressure relay (10).
上記のように構成された油圧エレベータにおいては，下
降運転指令が発せられると接点（９）が閉成し，（＋）
−（９）−（４）−（−）の回路によつて電動機（４）
が付勢され，また同時に（＋）−（９）−（５）−
（−）の回路によつて開閉弁（５）が開放される。これ
によつて油圧ジヤツキ（２）の圧油が排出されてかご
（１）が下降する。このようなかご（１）の下降中，又
はかご（１）が停止中で下降運転指令により電動機
（４）が付勢された場合に，何らかの故障によつて開閉
弁（５）が閉じそのままの状態で電動機（４）が回転し
続ける異常が発生することがある。これらの異常時には
管路の圧力が低くなるが所定値以下となつたときに圧力
検出器（８）が動作し接点（8a）が閉成する。このため
（＋）−（8a）−（10）−（−）の回路によつて圧力リ
レー（10）が付勢されて接点（10a）が開放する。接点
（10a）の開放によつて電動機（４）が消勢されて，管
路が負圧となりキヤビテーシヨン発生による異常振動，
機器摺動部の焼き付き等の障害発生が未然に防止され安
全性の高い油圧エレベータを得ることができる。In the hydraulic elevator constructed as described above, the contact (9) is closed when the descending operation command is issued, and the contact (9) is closed.
-(9)-(4)-(-) circuit allows electric motor (4)
Is activated, and at the same time, (+)-(9)-(5)-
The on-off valve (5) is opened by the circuit (-). As a result, the pressure oil of the hydraulic jack (2) is discharged and the car (1) is lowered. When the electric motor (4) is energized by the descending operation command while the car (1) is descending or the car (1) is stopped, the on-off valve (5) remains closed due to some failure. In some cases, an abnormality may occur in which the electric motor (4) continues to rotate. When these abnormalities occur, the pressure in the pipeline decreases, but when the pressure falls below a predetermined value, the pressure detector (8) operates and the contact (8a) closes. Therefore, the pressure relay (10) is energized by the (+)-(8a)-(10)-(-) circuit to open the contact (10a). When the contact (10a) is opened, the electric motor (4) is de-energized, the pipe becomes negative pressure, and abnormal vibration due to the occurrence of cavitation,
It is possible to obtain a highly safe hydraulic elevator in which the occurrence of troubles such as seizure of the sliding parts of the equipment is prevented.
また，第１図及び第２図の実施例を応用して次に述べる
ように構成することも容易に可能である。Further, it is also possible to easily construct the configuration as described below by applying the embodiment of FIGS. 1 and 2.
すなわち，開閉弁（５）と油圧ポンプ（３）の間の管路
圧力に応じた出力を発する圧力検出器（８）により，管
路圧力の異常低下を検出して異常制御装置を介して電動
機（４）を消勢するようにしても，第１図及び第２図の
実施例と同様な作用を得ることができる。That is, a pressure detector (8) that outputs an output in accordance with the line pressure between the on-off valve (5) and the hydraulic pump (3) detects an abnormal decrease in the line pressure, and an electric motor is passed through the abnormality control device. Even if (4) is deenergized, the same operation as that of the embodiment shown in FIGS. 1 and 2 can be obtained.
この発明は，以上説明したように開閉弁と油圧ポンプの
間の圧力検出器により圧力低下を検出して，油圧ポンプ
の電動機を消勢させる異常制御装置を設けたものであ
り，下降運転時に開閉弁が閉じた状態で電動機が付勢さ
れて管路に負圧が発生することによる障害を未然に防
ぎ，安全性を向上する効果がある。As described above, the present invention is provided with an abnormal control device for detecting the pressure drop by the pressure detector between the on-off valve and the hydraulic pump to deactivate the electric motor of the hydraulic pump. With the valve closed, the electric motor is energized to prevent a negative pressure from occurring in the pipeline, which has the effect of improving safety.
第１図はこの発明による油圧エレベータの一実施例を示
す概念図，第２図は第１図の油圧エレベータの要部電気
回路図，第３図は従来の油圧エレベータを示す第１図相
当図である。 （１）……かご，（２）……油圧ジヤツキ，（３）……
油圧ポンプ，（４）……電動機，（５）……開閉弁，
（８）……圧力検出器，（10）……異常制御装置。 なお，図中同一部分は同一符号により示す。FIG. 1 is a conceptual diagram showing an embodiment of a hydraulic elevator according to the present invention, FIG. 2 is an electric circuit diagram of a main part of the hydraulic elevator shown in FIG. 1, and FIG. 3 is a diagram corresponding to FIG. 1 showing a conventional hydraulic elevator. Is. (1) …… basket, (2) …… hydraulic jack, (3) ……
Hydraulic pump, (4) …… electric motor, (5) …… open / close valve,
(8) ... Pressure detector, (10) ... Abnormality control device. In the figure, the same parts are designated by the same reference numerals.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１５Ｂ 11/02 11/04 20/00 Ａ 7618−3Ｈ (72)発明者 牛田 博 愛知県稲沢市菱町１番地 三菱電機株式会 社稲沢製作所内 (72)発明者 下秋 元雄 愛知県稲沢市菱町１番地 三菱電機株式会 社稲沢製作所内 (56)参考文献 特開 昭61−169472（ＪＰ，Ａ) 実開 昭64−29399（ＪＰ，Ｕ) 特公 昭53−32577（ＪＰ，Ｂ２)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location F15B 11/02 11/04 20/00 A 7618-3H (72) Inventor Hiroshi Ushida Inazawa City, Aichi Prefecture Hishimachi No. 1 Inazawa Works, Mitsubishi Electric Co., Ltd. (72) Inventor Motoo Shimoaki No. 1 Hishimachi, Inazawa, Aichi Prefecture (56) Inazawa Works, Mitsubishi Electric Co., Ltd. (56) Reference JP-A 61-169472 (JP) , A) Actual Development Sho-29-29399 (JP, U) Japanese Patent Sho-53-32577 (JP, B2)
Claims (1)
出しかごを下降させ，かつ油圧ポンプを電動機により駆
動して上記開閉弁からの排出圧油の流量を制御し上記か
ごの下降動作を制御する油圧エレベータにおいて，上記
開閉弁及び油圧ポンプの間の管路圧力を検出する圧力検
出器と，この圧力検出器を介して上記管路圧力が所定値
以下になつたときに，上記電動機を消勢させる異常制御
装置とを備えたことを特徴とする油圧エレベータ。1. A descent of the car by opening the on-off valve to lower the pressure oil discharged from the hydraulic jack, and driving the hydraulic pump by an electric motor to control the flow rate of the pressure oil discharged from the on-off valve. In a hydraulic elevator that controls operation, a pressure detector that detects the line pressure between the on-off valve and the hydraulic pump, and when the line pressure drops below a predetermined value via this pressure detector, A hydraulic elevator, comprising: an abnormality control device for deactivating the electric motor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116704A JPH0712897B2 (en) | 1989-05-10 | 1989-05-10 | Hydraulic elevator |
| KR1019890018736A KR920007394B1 (en) | 1989-05-10 | 1989-12-16 | Hydraulic lift |
| CN90102689A CN1014972B (en) | 1989-05-10 | 1990-05-05 | Hydraulic lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1116704A JPH0712897B2 (en) | 1989-05-10 | 1989-05-10 | Hydraulic elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02295872A JPH02295872A (en) | 1990-12-06 |
| JPH0712897B2 true JPH0712897B2 (en) | 1995-02-15 |
Family
ID=14693767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1116704A Expired - Lifetime JPH0712897B2 (en) | 1989-05-10 | 1989-05-10 | Hydraulic elevator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0712897B2 (en) |
| KR (1) | KR920007394B1 (en) |
| CN (1) | CN1014972B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450909C (en) * | 2005-04-26 | 2009-01-14 | 王秋楠 | Safety circuit device for hydraulic elevator |
| US7904225B2 (en) * | 2005-06-03 | 2011-03-08 | Komatsu Ltd. | Working machine |
| CN104401849B (en) * | 2014-09-18 | 2016-09-07 | 韦伯电梯有限公司 | Hydraulic elevator system that is super-silent and that operate steadily |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5332577B2 (en) | 2008-12-12 | 2013-11-06 | 新日鐵住金株式会社 | Steel strip continuous processing equipment and continuous processing method |
-
1989
- 1989-05-10 JP JP1116704A patent/JPH0712897B2/en not_active Expired - Lifetime
- 1989-12-16 KR KR1019890018736A patent/KR920007394B1/en not_active Expired
-
1990
- 1990-05-05 CN CN90102689A patent/CN1014972B/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5332577B2 (en) | 2008-12-12 | 2013-11-06 | 新日鐵住金株式会社 | Steel strip continuous processing equipment and continuous processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR920007394B1 (en) | 1992-08-31 |
| JPH02295872A (en) | 1990-12-06 |
| CN1047261A (en) | 1990-11-28 |
| CN1014972B (en) | 1991-12-04 |
| KR900017892A (en) | 1990-12-20 |
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