JPH0199891U - - Google Patents
Info
- Publication number
- JPH0199891U JPH0199891U JP19551987U JP19551987U JPH0199891U JP H0199891 U JPH0199891 U JP H0199891U JP 19551987 U JP19551987 U JP 19551987U JP 19551987 U JP19551987 U JP 19551987U JP H0199891 U JPH0199891 U JP H0199891U
- Authority
- JP
- Japan
- Prior art keywords
- jack
- cylinder
- operation side
- oil chamber
- position switching
- 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 9
- 238000005336 cracking Methods 0.000 claims 2
- 230000008602 contraction Effects 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Jib Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
第1図は、本考案に係る作業車輌のアウトリガ
ー装置の制御装置を説明する要部説明図、第2図
は、従来の作業車輌のアウトリガー装置の制御装
置の説明図、第3図は本考案に係る作業車輌のア
ウトリガー装置の制御装置の他の実施例を説明す
る要部説明図である。
1:ジヤツキ張出用シリンダ、2:ジヤツキシ
リンダ、3:四方向三位置切換弁、4:選択弁、
5:パイロツト逆止弁、10:弁装置。
Fig. 1 is an explanatory diagram of main parts of a control device for an outrigger device of a work vehicle according to the present invention, Fig. 2 is an explanatory diagram of a control device of a conventional outrigger device of a work vehicle, and Fig. 3 is an explanatory diagram of the control device of an outrigger device of a work vehicle according to the present invention. FIG. 3 is a main part explanatory diagram illustrating another embodiment of a control device for an outrigger device of a work vehicle according to the present invention. 1: Jacket extension cylinder, 2: Jacket cylinder, 3: Four-way three-position switching valve, 4: Selection valve,
5: Pilot check valve, 10: Valve device.
Claims (1)
出用シリンダにより張り出されるジヤツキシリン
ダの対とからなるアウトリガーを、複数個備えて
なる作業車輌のアウトリガー装置の制御装置であ
つて、単一の四方向三位置切換弁の、一方の制御
ポートを各ジヤツキ張出用シリンダ並びに各ジヤ
ツキシリンダの縮小動作側圧油室に連結し、各ア
ウトリガのジヤツキ張出用シリンダとジヤツキシ
リンダの伸長動作側圧油室を夫々選択弁を介して
前記四方向三位置切換弁の他方の制御ポートに接
続し、且つ前記各ジヤツキシリンダの伸長動作側
圧油室と対応する前記選択弁間の油路に当該ジヤ
ツキシリンダの縮小動作側圧油室に連なる油路の
昇圧により開放するパイロツト逆止弁を夫々介装
してなるものにおいて、前記四方向三位置切換弁
の一方の制御ポートを各ジヤツキ張出用シリンダ
並びに各ジヤツキシリンダの縮小動作側圧油室に
接続するに際し、四方向三位置切換弁方向への作
動油の流れに対し所定のクラツキング圧を有し逆
流は可能な単一の弁装置を介装して接続すると共
に、前記弁装置のクラツキング圧を縮小状態にあ
る各ジヤツキシリンダの自重降下を阻止するに足
る縮小動作側圧油室の油圧よりもやや高く設定し
てあることを特徴とする作業車輌のアウトリガー
装置の制御装置。 A control device for an outrigger device for a working vehicle comprising a plurality of outriggers each consisting of a jack extension cylinder and a pair of jack cylinders extended by the jack extension cylinder, Connect one control port of the position switching valve to each jack extension cylinder and the contraction operation side pressure oil chamber of each jack cylinder, and connect the jack extension cylinder of each outrigger and the extension operation side pressure oil chamber of each jack cylinder. Each of the four-way three-position switching valves is connected to the other control port of the four-way three-position switching valve through a selection valve, and an oil path between the selection valves corresponding to the extension operation side pressure oil chamber of each of the jack cylinders is provided with the jack cylinder. In a device equipped with pilot check valves that are opened by increasing the pressure of the oil passage connected to the reduction operation side pressure oil chamber, one control port of the four-way three-position switching valve is connected to each jack extension cylinder and each jack. When connecting to the pressure oil chamber on the reduction operation side of the Tsuki cylinder, connect it by interposing a single valve device that has a predetermined cracking pressure against the flow of hydraulic oil in the direction of the four-way three-position switching valve and allows reverse flow. In addition, the cracking pressure of the valve device is set to be slightly higher than the oil pressure of the reduction operation side pressure oil chamber that is sufficient to prevent the weight of each jack cylinder in the reduction state from dropping. Device control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19551987U JPH07473Y2 (en) | 1987-12-22 | 1987-12-22 | Control device for outrigger device of work vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19551987U JPH07473Y2 (en) | 1987-12-22 | 1987-12-22 | Control device for outrigger device of work vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0199891U true JPH0199891U (en) | 1989-07-04 |
JPH07473Y2 JPH07473Y2 (en) | 1995-01-11 |
Family
ID=31486192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19551987U Expired - Lifetime JPH07473Y2 (en) | 1987-12-22 | 1987-12-22 | Control device for outrigger device of work vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07473Y2 (en) |
-
1987
- 1987-12-22 JP JP19551987U patent/JPH07473Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07473Y2 (en) | 1995-01-11 |
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