JPH022399U - - Google Patents
Info
- Publication number
- JPH022399U JPH022399U JP7907088U JP7907088U JPH022399U JP H022399 U JPH022399 U JP H022399U JP 7907088 U JP7907088 U JP 7907088U JP 7907088 U JP7907088 U JP 7907088U JP H022399 U JPH022399 U JP H022399U
- Authority
- JP
- Japan
- Prior art keywords
- ports
- valve body
- ball valve
- hydraulic cylinder
- port connected
- 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.)
- Granted
Links
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Description
第１図は本考案の一実施例を示す油圧回路図、
第２図は荷役作業機の側面図、第３図は同正面図
、第４図は同平面図、第５図及び第６図は応用例
の説明図である。
１１…油圧シリンダ、２３…油圧ポンプ、２８
…油タンク、２９…一次側ポート、３０…二次側
ポート、３１…バルブ本体、３２…バルブ室、３
４…ボール弁、３６…復流用スプリング、３９…
加圧調節ボルト、４０…スプール。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is a side view of the cargo handling machine, FIG. 3 is a front view thereof, FIG. 4 is a plan view thereof, and FIGS. 5 and 6 are explanatory diagrams of an application example. 11...Hydraulic cylinder, 23...Hydraulic pump, 28
...Oil tank, 29...Primary side port, 30...Secondary side port, 31...Valve body, 32...Valve chamber, 3
4... Ball valve, 36... Return flow spring, 39...
Pressure adjustment bolt, 40...spool.
Claims (1)
ートと、油圧シリンダに接続させる二次側ポート
とを、バルブ本体に設ける一方、前記の一次側と
二次側の各ポートを連通制御するバルブ本体のバ
ルブ室にボール弁を内設させ、油圧シリンダから
の圧油によつて前記各ポートを遮断すべく前記ボ
ール弁を設けると共に、前記ボール弁を開作動さ
せて前記各ポートを連通させる復流用スプリング
を備え、加圧調節ボルトによつて変位させるスプ
ールを介してバルブ本体に前記スプリングを設け
たことを特徴とする荷役作業機の落下防止装置。 The valve body is provided with a primary port connected to a hydraulic pump and an oil tank, and a secondary port connected to a hydraulic cylinder, and the valve body controls communication between the primary and secondary ports. A ball valve is installed inside the chamber, and the ball valve is provided to block each of the ports by pressure oil from a hydraulic cylinder, and a return spring is provided to open the ball valve and connect the ports to each other. A fall prevention device for a cargo handling machine, characterized in that the spring is provided on the valve body via a spool that is displaced by a pressure adjustment bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079070U JPH0625520Y2 (en) | 1988-06-15 | 1988-06-15 | Fall prevention device for cargo handling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988079070U JPH0625520Y2 (en) | 1988-06-15 | 1988-06-15 | Fall prevention device for cargo handling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH022399U true JPH022399U (en) | 1990-01-09 |
| JPH0625520Y2 JPH0625520Y2 (en) | 1994-07-06 |
Family
ID=31303958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988079070U Expired - Lifetime JPH0625520Y2 (en) | 1988-06-15 | 1988-06-15 | Fall prevention device for cargo handling equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625520Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163777U (en) * | 1982-04-28 | 1983-10-31 | 三菱重工業株式会社 | Fall prevention valve |
| JPS6018371U (en) * | 1983-07-15 | 1985-02-07 | 三菱重工業株式会社 | Lift cylinder flow control valve |
-
1988
- 1988-06-15 JP JP1988079070U patent/JPH0625520Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163777U (en) * | 1982-04-28 | 1983-10-31 | 三菱重工業株式会社 | Fall prevention valve |
| JPS6018371U (en) * | 1983-07-15 | 1985-02-07 | 三菱重工業株式会社 | Lift cylinder flow control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0625520Y2 (en) | 1994-07-06 |
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