JPS635057U - - Google Patents

Info

Publication number
JPS635057U
JPS635057U JP9886086U JP9886086U JPS635057U JP S635057 U JPS635057 U JP S635057U JP 9886086 U JP9886086 U JP 9886086U JP 9886086 U JP9886086 U JP 9886086U JP S635057 U JPS635057 U JP S635057U
Authority
JP
Japan
Prior art keywords
work equipment
work
hydraulic pressure
work machine
pilot check
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
JP9886086U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP9886086U priority Critical patent/JPS635057U/ja
Publication of JPS635057U publication Critical patent/JPS635057U/ja
Pending legal-status Critical Current

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Landscapes

  • Shovels (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す全体的な構
成図、第２図は油圧回路図である。 ３は作業機、１２，１６はパイロツトチエツク
弁、２０は油圧源、２１は切換え弁。 FIG. 1 is an overall configuration diagram showing an embodiment of this invention, and FIG. 2 is a hydraulic circuit diagram. 3 is a working machine, 12 and 16 are pilot check valves, 20 is a hydraulic power source, and 21 is a switching valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 作業機操作弁より作業機アクチユエータへ油圧
を供給して作業機３を駆動すると共に、作業機操
作弁と作業機アクチユエータの間に、作業機３の
自重により作業機３が自然落下するのを防止する
パイロツトチエツク弁１２，１６を設けたものに
おいて、上記作業機３へ油圧を供給する油圧源と
別に設けた油圧源２０より導入した油圧を、作業
機動作時開放する切換え弁を介してパイロツトチ
エツク弁１２，１６へ供給し、これを開放してな
る建設機械の作業機自然落下防止装置。 Hydraulic pressure is supplied from the work equipment operation valve to the work equipment actuator to drive the work equipment 3, and the work equipment 3 is prevented from falling by itself due to its own weight between the work equipment operation valve and the work equipment actuator. In a device equipped with pilot check valves 12 and 16, hydraulic pressure introduced from a hydraulic source 20 provided separately from the hydraulic source that supplies hydraulic pressure to the work machine 3 is used to conduct a pilot check via a switching valve that is opened when the work machine is operated. A work machine fall prevention device for construction machinery, which is constructed by supplying valves 12 and 16 and opening them.
JP9886086U 1986-06-30 1986-06-30 Pending JPS635057U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9886086U JPS635057U (en) 1986-06-30 1986-06-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9886086U JPS635057U (en) 1986-06-30 1986-06-30

Publications (1)

Publication Number Publication Date
JPS635057U true JPS635057U (en) 1988-01-13

Family

ID=30967207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9886086U Pending JPS635057U (en) 1986-06-30 1986-06-30

Country Status (1)

Country Link
JP (1) JPS635057U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01295928A (en) * 1988-05-20 1989-11-29 Toshiba Mach Co Ltd Oil-hydraulic circuit for civil engineering and construction machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01295928A (en) * 1988-05-20 1989-11-29 Toshiba Mach Co Ltd Oil-hydraulic circuit for civil engineering and construction machinery

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