JPS6277196U - - Google Patents
Info
- Publication number
- JPS6277196U JPS6277196U JP16651285U JP16651285U JPS6277196U JP S6277196 U JPS6277196 U JP S6277196U JP 16651285 U JP16651285 U JP 16651285U JP 16651285 U JP16651285 U JP 16651285U JP S6277196 U JPS6277196 U JP S6277196U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- stop
- auto
- cylinder
- stop valve
- 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
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Jib Cranes (AREA)
Description
図面は本考案の実施例を説明する図で、第１図
はブームストツプの説明図、第２図は本考案を実
用するのに好適なアースドリルの全体側面図、第
３図は油圧回路の説明図である。
１……本体、２……ブーム、７……ブーム起伏
用のウインチ、１０……ブームストツプ、１１…
…アウターサポート、１３……インナーサポート
、１４……静油圧シリンダ、１８……パイロツト
管路、１９……オートストツプ弁、２０……起伏
用の油圧モータ、２１……主切換弁、２２……操
作弁。
The drawings are diagrams illustrating an embodiment of the present invention. Fig. 1 is an explanatory diagram of a boom stop, Fig. 2 is an overall side view of an earth drill suitable for putting the invention into practice, and Fig. 3 is an explanation of a hydraulic circuit. It is a diagram. 1...Main body, 2...Boom, 7...Winch for raising and lowering the boom, 10...Boom stop, 11...
... Outer support, 13 ... Inner support, 14 ... Hydrostatic cylinder, 18 ... Pilot pipe, 19 ... Auto stop valve, 20 ... Hydraulic motor for luffing, 21 ... Main switching valve, 22 ... Operation valve.
Claims (1)
値を越えて起き過ぎたとき電気信号で切り換えら
れ、前記油圧モータへの送油を主切換弁を介して
停止するように動作するオートストツプ弁と、ブ
ームの後方に、該ブームの後方への倒れを防止す
るブームストツプとを備えた移動式クレーンにお
いて、前記ブームストツプに静油圧シリンダを介
設し、該静油圧シリンダと前記オートストツプ弁
とをパイロツト管路で接続し、静電圧シリンダで
発生する油圧によつても前記オートストツプ弁を
動作させられるように構成したことを特徴とする
移動式クレーンにおけるブームの起こし過ぎ防止
装置。 A hydraulic motor that raises and lowers the boom, an auto-stop valve that is switched by an electric signal when the boom rises above a reference value and operates to stop oil supply to the hydraulic motor via a main switching valve, and the boom. A mobile crane is provided with a boom stop behind the boom that prevents the boom from falling backward, a hydrostatic cylinder being interposed in the boom stop, and the hydrostatic cylinder and the auto-stop valve being connected by a pilot conduit. A boom over-raising prevention device for a mobile crane, characterized in that the auto-stop valve is configured to be operated by hydraulic pressure generated by an electrostatic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16651285U JPS6277196U (en) | 1985-10-31 | 1985-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16651285U JPS6277196U (en) | 1985-10-31 | 1985-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6277196U true JPS6277196U (en) | 1987-05-18 |
Family
ID=31097559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16651285U Pending JPS6277196U (en) | 1985-10-31 | 1985-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6277196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09151081A (en) * | 1995-11-30 | 1997-06-10 | Hitachi Constr Mach Co Ltd | Tower crane |
-
1985
- 1985-10-31 JP JP16651285U patent/JPS6277196U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09151081A (en) * | 1995-11-30 | 1997-06-10 | Hitachi Constr Mach Co Ltd | Tower crane |
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