JPH0318072U - - Google Patents
Info
- Publication number
- JPH0318072U JPH0318072U JP7975189U JP7975189U JPH0318072U JP H0318072 U JPH0318072 U JP H0318072U JP 7975189 U JP7975189 U JP 7975189U JP 7975189 U JP7975189 U JP 7975189U JP H0318072 U JPH0318072 U JP H0318072U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- electric motor
- check valve
- oil
- control device
- 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
Links
- 239000010720 hydraulic oil Substances 0.000 claims 4
- 238000007599 discharging Methods 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Types And Forms Of Lifts (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
第１図の実施例の下降運転時の動作説明図、第３
図は本考案の他の実施例を示す図、第４図は従来
の油圧エレベータの基本構成を示す図、第５図は
第４図は従来例の下降運転時の動作説明図である
。
１……制御装置、２……電動機、３……油圧ポ
ンプ、４……油圧ジヤツキ、５……乗かご、８…
…逆止弁、９……パイロツト弁、１２……スイツ
チ。
Fig. 1 is a diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the embodiment of Fig. 1 during descending operation, and Fig. 3 is a diagram showing an embodiment of the present invention.
4 is a diagram showing the basic structure of a conventional hydraulic elevator, and FIG. 5 is a diagram illustrating the operation of the conventional example during descending operation. 1... Control device, 2... Electric motor, 3... Hydraulic pump, 4... Hydraulic jack, 5... Car, 8...
...Check valve, 9...Pilot valve, 12...Switch.
Claims (1)
を昇降させる油圧ジヤツキと、電動機と、この電
動機の回転数を制御する制御装置と、前記電動機
によつて駆動され作動油を供給及び排出させて、
前記油圧ジヤツキ内の作動油を増減させる油圧ポ
ンプと、この油圧ポンプと前記油圧ジヤツキ間に
設けられた逆止弁とを備え、下降運転開始時には
前記制御装置により前記油圧ポンプを正転させた
後逆転させるようにした油圧エレベータにおいて
、 前記逆止弁の前記油圧ポンプ側の作動油の圧力
と、前記逆止弁の前記油圧ジヤツキ側の作動油の
圧力とがほぼ等しくなると作動して前記逆止弁を
開くパイロツト弁と、下降運転開始時に前記パイ
ロツト弁の作動を検出すると前記電動機を逆転さ
せるスイツチとを備えたことを特徴とする油圧エ
レベータ。[Claims for Utility Model Registration] A hydraulic jack that raises and lowers a car by supplying and discharging hydraulic oil, an electric motor, a control device that controls the rotation speed of the electric motor, and a control device that is driven and operated by the electric motor. supplying and discharging oil,
A hydraulic pump that increases or decreases the hydraulic oil in the hydraulic jack, and a check valve provided between the hydraulic pump and the hydraulic jack, and when the downward operation starts, the hydraulic pump is rotated in the normal direction by the control device. In the hydraulic elevator configured to rotate in reverse, the check valve operates when the pressure of hydraulic oil on the hydraulic pump side of the check valve and the pressure of hydraulic oil on the hydraulic jack side of the check valve are approximately equal. A hydraulic elevator characterized in that it is equipped with a pilot valve that opens the valve, and a switch that reverses the electric motor when operation of the pilot valve is detected at the start of descending operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7975189U JPH0318072U (en) | 1989-07-05 | 1989-07-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7975189U JPH0318072U (en) | 1989-07-05 | 1989-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0318072U true JPH0318072U (en) | 1991-02-22 |
Family
ID=31624194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7975189U Pending JPH0318072U (en) | 1989-07-05 | 1989-07-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0318072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002029601A (en) * | 2000-10-06 | 2002-01-29 | Marumoto:Kk | Trash bag |
-
1989
- 1989-07-05 JP JP7975189U patent/JPH0318072U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002029601A (en) * | 2000-10-06 | 2002-01-29 | Marumoto:Kk | Trash bag |
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