JPS6428198A - Cylinder sequential actuator - Google Patents
Cylinder sequential actuatorInfo
- Publication number
- JPS6428198A JPS6428198A JP17992287A JP17992287A JPS6428198A JP S6428198 A JPS6428198 A JP S6428198A JP 17992287 A JP17992287 A JP 17992287A JP 17992287 A JP17992287 A JP 17992287A JP S6428198 A JPS6428198 A JP S6428198A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- elongated
- pressure oil
- check valve
- opened
- 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
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To stabilize an operation with a simple structure by stopping one of two cylinders by closing a check valve, elongating/contracting the other on priority basis, and forcibly opening the valve to operate the other cylinder when the preceding cylinder reaches a stroke end. CONSTITUTION: For cylinder elongation, the discharge pressure of a hydraulic pump 1 causes a first cylinder 4 to be elongated by the action of a check valve 45 opened toward the piston head side room 25 of the first cylinder 4. During this period, by the actions of third and fourth check valves 15 and 41 opened in directions opposite the flowing direction of pressure oil for the elongation of a second cylinder 5, an opening/closing switching valve for feeding pressure oil to the piston head side room of the second cylinder 5 is kept closed, and accordingly the second cylinder 5 is not operated to be elongated. When the first cylinder 4 is elongated to its limit, the check valve 15 is forcibly opened by the action of a first forcing member (hollow rod 12), pressure oil is supplied to the second cylinder 5 to be operated to be elongated, and in this way, the cylinders are sequentially elongated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17992287A JPS6428198A (en) | 1987-07-21 | 1987-07-21 | Cylinder sequential actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17992287A JPS6428198A (en) | 1987-07-21 | 1987-07-21 | Cylinder sequential actuator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6428198A true JPS6428198A (en) | 1989-01-30 |
JPH0428637B2 JPH0428637B2 (en) | 1992-05-14 |
Family
ID=16074267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17992287A Granted JPS6428198A (en) | 1987-07-21 | 1987-07-21 | Cylinder sequential actuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6428198A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005154038A (en) * | 2003-11-21 | 2005-06-16 | Furukawa Co Ltd | On-vehicle crane |
CN105864134A (en) * | 2016-04-22 | 2016-08-17 | 三帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic system and crane |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614595A (en) * | 1979-07-17 | 1981-02-12 | Asahi Dow Ltd | Purification of wool wax |
JPS6139750U (en) * | 1984-08-16 | 1986-03-13 | 株式会社竹中工務店 | Hopper for concrete pouring |
-
1987
- 1987-07-21 JP JP17992287A patent/JPS6428198A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614595A (en) * | 1979-07-17 | 1981-02-12 | Asahi Dow Ltd | Purification of wool wax |
JPS6139750U (en) * | 1984-08-16 | 1986-03-13 | 株式会社竹中工務店 | Hopper for concrete pouring |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005154038A (en) * | 2003-11-21 | 2005-06-16 | Furukawa Co Ltd | On-vehicle crane |
CN105864134A (en) * | 2016-04-22 | 2016-08-17 | 三帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic system and crane |
Also Published As
Publication number | Publication date |
---|---|
JPH0428637B2 (en) | 1992-05-14 |
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