JPH0280170U - - Google Patents
Info
- Publication number
- JPH0280170U JPH0280170U JP1988158767U JP15876788U JPH0280170U JP H0280170 U JPH0280170 U JP H0280170U JP 1988158767 U JP1988158767 U JP 1988158767U JP 15876788 U JP15876788 U JP 15876788U JP H0280170 U JPH0280170 U JP H0280170U
- Authority
- JP
- Japan
- Prior art keywords
- safety valve
- driver
- construction machinery
- seat switch
- safety
- 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 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
Description
第１図乃至第３図は本考案の一実施例に係るも
のであり、第１図は油圧回路の全体を示す図面、
第２図は運転席の部分縦断面図、第３図は操作レ
バーの操作要領を示す概略平面図、第４図は着座
スイツチと安全弁との変形実施例を示す概略縦断
面図、第５図は一般的なパワーシヨベルを示す側
面図である。
１…パワーシヨベル、２０，２１…油圧ポンプ
、２２…タンク、２３，２４…コントロールバル
ブ、３７，３８…安全弁、１４…着座スイツチ、
４０…安全弁。
1 to 3 relate to one embodiment of the present invention, and FIG. 1 is a diagram showing the entire hydraulic circuit;
Fig. 2 is a partial longitudinal sectional view of the driver's seat, Fig. 3 is a schematic plan view showing how to operate the operating lever, Fig. 4 is a schematic longitudinal sectional view showing a modified embodiment of the seat switch and safety valve, and Fig. 5. is a side view showing a general power shovel. 1... Power shovel, 20, 21... Hydraulic pump, 22... Tank, 23, 24... Control valve, 37, 38... Safety valve, 14... Seating switch,
40...Safety valve.
Claims (1)
圧力油を分配供給するコントロールバルブとの流
路間に配設された安全弁をＯＮ，ＯＦＦ制御する
安全装置であつて、運転席に運転者の着座の有無
を検知してＯＮ，ＯＦＦ動作する着座スイツチを
設け、該着座スイツチを前記安全弁に電気的又は
機械的に接続して運転者の着座の有無によつて安
全弁をＯＮ，ＯＦＦ制御するようにしたことを特
徴とする建設機械の油圧回路安全装置。 This is a safety device that controls ON/OFF of a safety valve installed between the hydraulic pressure supply source of construction machinery and a control valve that distributes pressure oil to each actuator. A seat switch is provided that turns on and off by detecting the presence of the driver, and the seat switch is electrically or mechanically connected to the safety valve to control the safety valve to turn on and off depending on whether or not the driver is seated. A hydraulic circuit safety device for construction machinery characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988158767U JPH0280170U (en) | 1988-12-06 | 1988-12-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988158767U JPH0280170U (en) | 1988-12-06 | 1988-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0280170U true JPH0280170U (en) | 1990-06-20 |
Family
ID=31439393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988158767U Pending JPH0280170U (en) | 1988-12-06 | 1988-12-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0280170U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510039U (en) * | 1991-07-19 | 1993-02-09 | 小松フオークリフト株式会社 | Cab equipment for cargo handling vehicles |
| JPH09329107A (en) * | 1996-04-11 | 1997-12-22 | Nabco Ltd | Hydraulic circuit |
| EP0819795A1 (en) | 1996-02-01 | 1998-01-21 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic circuit for hydraulic machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760960B2 (en) * | 1977-02-15 | 1982-12-22 | Mashiinenbau Uee Aa Emu Marugarete Osuteruhoofu |
-
1988
- 1988-12-06 JP JP1988158767U patent/JPH0280170U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760960B2 (en) * | 1977-02-15 | 1982-12-22 | Mashiinenbau Uee Aa Emu Marugarete Osuteruhoofu |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0510039U (en) * | 1991-07-19 | 1993-02-09 | 小松フオークリフト株式会社 | Cab equipment for cargo handling vehicles |
| EP0819795A1 (en) | 1996-02-01 | 1998-01-21 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic circuit for hydraulic machine |
| JPH09329107A (en) * | 1996-04-11 | 1997-12-22 | Nabco Ltd | Hydraulic circuit |