JPH03107500U - - Google Patents
Info
- Publication number
- JPH03107500U JPH03107500U JP1590590U JP1590590U JPH03107500U JP H03107500 U JPH03107500 U JP H03107500U JP 1590590 U JP1590590 U JP 1590590U JP 1590590 U JP1590590 U JP 1590590U JP H03107500 U JPH03107500 U JP H03107500U
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- main
- oil
- boom
- valve unit
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims 15
- 239000010720 hydraulic oil Substances 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
第１図は、本考案に係る操作装置の油圧回路図
、第２図は、上記操作装置を備えた高所作業車の
斜視図、第３図、第４図は、従来の操作装置の油
圧回路図である。
３……旋回モータ、４……ブーム、５……起伏
シリンダ、６……伸縮シリンダ、７……バケツト
、１１，４１……下部操作弁ユニツト、１２，４
２……メイン油路、１７，４５……キヤリオーバ
油路、２１，４４……上部操作弁ユニツト、３１
，５６……メインアンロード弁、３２……キヤリ
オーバアンロード弁、３３，５１……下部緊急停
止スイツチ、３４，５４……上部緊急停止スイツ
チ、３５……メインアンロード解除スイツチ。
FIG. 1 is a hydraulic circuit diagram of an operating device according to the present invention, FIG. 2 is a perspective view of an aerial work vehicle equipped with the above-mentioned operating device, and FIGS. 3 and 4 are hydraulic circuit diagrams of a conventional operating device. It is a circuit diagram. 3... Swivel motor, 4... Boom, 5... Lifting cylinder, 6... Telescopic cylinder, 7... Bucket, 11, 41... Lower operation valve unit, 12, 4
2... Main oil passage, 17, 45... Carryover oil passage, 21, 44... Upper operation valve unit, 31
, 56...Main unload valve, 32...Carryover unload valve, 33, 51...Lower emergency stop switch, 34, 54...Upper emergency stop switch, 35...Main unload release switch.
Claims (1)
ームと、このブームの先端に備えられた作業台と
、前記車体側に配設され、油圧源に繋がるメイン
油路を介して供給される作動油を用いて前記ブー
ムの作動制御を行う下部操作弁ユニツトと、この
下部操作弁ユニツトに繋がるキヤリオーバ油路を
介して、前記下部操作弁ユニツトが中立状態のと
きに供給される作動油を用いて前記ブームの作動
制御を行う上部操作弁ユニツトとからなる高所作
業車の操作装置において、 前記メイン油路上に配設され、オイルタンクに
連通可能なメインアンロード弁と、 前記キヤリオーバ油路上に配設され、前記オイ
ルタンクに連通可能なキヤリオーバアンロード弁
と、 前記車体側に配設され、前記メインアンロード
弁を作動させて前記メイン油路を前記オイルタン
クに連通させる下部緊急停止スイツチと、 前記作業台側に配設され、前記キヤリオーバア
ンロード弁を作動させて前記キヤリオーバ油路を
前記オイルタンクに連通させるとともに、前記メ
インアンロード弁を作動させて前記メイン油路を
前記オイルタンクに連通させる上部緊急停止スイ
ツチと、 前記車体側に配設され、前記上部緊急停止スイ
ツチがオンされているときに、前記メインアンロ
ード弁の作動のみを解除させて前記メイン油路を
開通させることにより前記下部操作弁ユニツトに
よる前記ブームの作動制御を可能とさせるメイン
アンロード解除スイツチとからなることを特徴と
する高所作業車の操作装置。[Scope of Claim for Utility Model Registration] A boom provided on the vehicle body that can at least be raised and lowered freely, a work platform provided at the tip of the boom, and a main oil passage provided on the vehicle body side and connected to a hydraulic power source. A lower operation valve unit that controls the operation of the boom using hydraulic oil supplied through the lower operation valve unit, and a carryover oil passage connected to the lower operation valve unit, which is supplied when the lower operation valve unit is in a neutral state. An operating device for an aerial work vehicle comprising an upper operation valve unit that controls the operation of the boom using hydraulic oil, comprising: a main unload valve disposed on the main oil passage and capable of communicating with an oil tank; a carry-over unload valve disposed on the carry-over oil passage and capable of communicating with the oil tank; and a carry-over unload valve disposed on the vehicle body side, the main unload valve being actuated to communicate the main oil passage with the oil tank. a lower emergency stop switch disposed on the workbench side, which operates the carryover unload valve to communicate the carryover oil passage with the oil tank, and operates the main unload valve to communicate the carryover oil passage with the oil tank; an upper emergency stop switch that communicates an oil passage with the oil tank; and an upper emergency stop switch disposed on the vehicle body side, which releases only the operation of the main unload valve when the upper emergency stop switch is turned on. An operating device for an aerial work vehicle, comprising a main unload release switch that enables the lower operation valve unit to control the operation of the boom by opening an oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1590590U JPH0721517Y2 (en) | 1990-02-20 | 1990-02-20 | Operating equipment for aerial work platforms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1590590U JPH0721517Y2 (en) | 1990-02-20 | 1990-02-20 | Operating equipment for aerial work platforms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03107500U true JPH03107500U (en) | 1991-11-06 |
| JPH0721517Y2 JPH0721517Y2 (en) | 1995-05-17 |
Family
ID=31519194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1590590U Expired - Fee Related JPH0721517Y2 (en) | 1990-02-20 | 1990-02-20 | Operating equipment for aerial work platforms |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721517Y2 (en) |
-
1990
- 1990-02-20 JP JP1590590U patent/JPH0721517Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0721517Y2 (en) | 1995-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |