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
Links
- 238000010276 construction Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Description
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)
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.
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)
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 |
-
1986
- 1986-06-30 JP JP9886086U patent/JPS635057U/ja active Pending
Cited By (1)
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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