JPS6412111A - Safety device for automatic operation in hydraulic working machine - Google Patents

Safety device for automatic operation in hydraulic working machine

Info

Publication number
JPS6412111A
JPS6412111A JP16910887A JP16910887A JPS6412111A JP S6412111 A JPS6412111 A JP S6412111A JP 16910887 A JP16910887 A JP 16910887A JP 16910887 A JP16910887 A JP 16910887A JP S6412111 A JPS6412111 A JP S6412111A
Authority
JP
Japan
Prior art keywords
electro
hydraulic control
control valve
safety device
working machine
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
Application number
JP16910887A
Other languages
Japanese (ja)
Inventor
Hirokazu Shintani
Makoto Kakuzen
Shinichi Umemura
Koichiro Niwada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP16910887A priority Critical patent/JPS6412111A/en
Publication of JPS6412111A publication Critical patent/JPS6412111A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

PURPOSE:To maintain safety of work by stopping the supply of a driving current to an electro-hydraulic control valve at the time of abnormality and returning the valve to neutral state. CONSTITUTION:A switch 11 is disposed between a power source 12 and a valve driving circuit 4, and a speed detector 8 is provided on a working apparatus 7. Output from the speed detector 8 is input to a controller 3, and output of the controller 3 and the working speed of the working apparatus 7 are compared with reference values. When at least one of them is outside the reference range, the switch 11 is opened, Thus, at the time of abnormality, the supply of a driving current to an electro-hydraulic control valve 5 is stopped to return the electro-hydraulic control valve 5 to neutral state, so that operation of the working apparatus 7 is forcedly stopped so as to maintain safety of work.
JP16910887A 1987-07-06 1987-07-06 Safety device for automatic operation in hydraulic working machine Pending JPS6412111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16910887A JPS6412111A (en) 1987-07-06 1987-07-06 Safety device for automatic operation in hydraulic working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16910887A JPS6412111A (en) 1987-07-06 1987-07-06 Safety device for automatic operation in hydraulic working machine

Publications (1)

Publication Number Publication Date
JPS6412111A true JPS6412111A (en) 1989-01-17

Family

ID=15880450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16910887A Pending JPS6412111A (en) 1987-07-06 1987-07-06 Safety device for automatic operation in hydraulic working machine

Country Status (1)

Country Link
JP (1) JPS6412111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011506900A (en) * 2007-12-21 2011-03-03 パナソニック マニファクチュアリング ユーケイ リミテッド Controlled opening of home appliances

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833642A (en) * 1981-08-25 1983-02-26 Hitachi Constr Mach Co Ltd Supporter for leader
JPS5914493A (en) * 1982-07-12 1984-01-25 オ−バル機器工業株式会社 Safety device
JPS6026802A (en) * 1983-07-25 1985-02-09 Ishikawajima Harima Heavy Ind Co Ltd Servo valve failure detection method
JPS61211203A (en) * 1985-03-14 1986-09-19 極東開発工業株式会社 Driving controller for garbage push-in device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833642A (en) * 1981-08-25 1983-02-26 Hitachi Constr Mach Co Ltd Supporter for leader
JPS5914493A (en) * 1982-07-12 1984-01-25 オ−バル機器工業株式会社 Safety device
JPS6026802A (en) * 1983-07-25 1985-02-09 Ishikawajima Harima Heavy Ind Co Ltd Servo valve failure detection method
JPS61211203A (en) * 1985-03-14 1986-09-19 極東開発工業株式会社 Driving controller for garbage push-in device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011506900A (en) * 2007-12-21 2011-03-03 パナソニック マニファクチュアリング ユーケイ リミテッド Controlled opening of home appliances

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