JPS5449747A - Operation control device for hydraulic crane - Google Patents
Operation control device for hydraulic craneInfo
- Publication number
- JPS5449747A JPS5449747A JP11409477A JP11409477A JPS5449747A JP S5449747 A JPS5449747 A JP S5449747A JP 11409477 A JP11409477 A JP 11409477A JP 11409477 A JP11409477 A JP 11409477A JP S5449747 A JPS5449747 A JP S5449747A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic circuit
- boom
- circuit
- safety
- crane
- 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
Landscapes
- Control And Safety Of Cranes (AREA)
Abstract
PURPOSE: To provide an operation control device which ensures the safety of the crane while permitting the crane to be self-returned to the safety position depending on the operation on the safe side by leaving the operation on the safe side alone continuing while the operation on the hazardous side is suspended when overload is applied.
CONSTITUTION: When a detection switch 35 of a detector is closed as the boom length, the boom angle or the maximum lifting load exceeds the safety allowable limit, a relay coil 36 is energized to close a relay contact 37, causing respecitve solenoids 30a to 34a to be excited. Thus, solenoid valves 30 to 34 are opened. Consequently, pressure oil in hydraulic circuit 1a to 4a and 4b for driving the hazardous side in respective actuators 25 to 29 passes through vent circuit 25 to 29 and is drained to a tank 13 from tank circuit through the solenoid valves 30 to 34. At this moment, a normal pressure oil is fed to a hydraulic circuit 1b on the rope lowering side, a hydraulic circuit 2b on the boom reducing side and a hydraulic circuit 3b on the boom elevating side whereby the operation on the safe side can be done without trouble
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11409477A JPS5449747A (en) | 1977-09-22 | 1977-09-22 | Operation control device for hydraulic crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11409477A JPS5449747A (en) | 1977-09-22 | 1977-09-22 | Operation control device for hydraulic crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5449747A true JPS5449747A (en) | 1979-04-19 |
Family
ID=14628944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11409477A Pending JPS5449747A (en) | 1977-09-22 | 1977-09-22 | Operation control device for hydraulic crane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5449747A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141293A (en) * | 1980-04-07 | 1981-11-04 | Tadano Tekkosho Kk | Preventive device for upset of oil pressure type crane to rear side |
| JPS58180900U (en) * | 1982-05-24 | 1983-12-02 | 株式会社多田野鉄工所 | Safety equipment for aerial work vehicles |
| JPS60114200U (en) * | 1984-01-10 | 1985-08-02 | 愛知車輛株式会社 | Fall prevention device for self-propelled aerial work vehicles |
| JPS6137698A (en) * | 1984-07-30 | 1986-02-22 | 新明和工業株式会社 | Work vehicle safety equipment |
| JPS61183090A (en) * | 1985-02-08 | 1986-08-15 | 金剛株式会社 | Control circuit for attachment device of overhead travellingcrane |
| JPS624199A (en) * | 1986-05-23 | 1987-01-10 | 新明和工業株式会社 | Safety equipment for aerial work vehicles |
| CN102020212A (en) * | 2010-12-01 | 2011-04-20 | 安徽星马汽车股份有限公司 | Mobile hydraulic safety device of overloading restart of hoisting vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4828221U (en) * | 1971-08-06 | 1973-04-06 |
-
1977
- 1977-09-22 JP JP11409477A patent/JPS5449747A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4828221U (en) * | 1971-08-06 | 1973-04-06 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141293A (en) * | 1980-04-07 | 1981-11-04 | Tadano Tekkosho Kk | Preventive device for upset of oil pressure type crane to rear side |
| JPS58180900U (en) * | 1982-05-24 | 1983-12-02 | 株式会社多田野鉄工所 | Safety equipment for aerial work vehicles |
| JPH0133590Y2 (en) * | 1982-05-24 | 1989-10-12 | ||
| JPS60114200U (en) * | 1984-01-10 | 1985-08-02 | 愛知車輛株式会社 | Fall prevention device for self-propelled aerial work vehicles |
| JPS6137698A (en) * | 1984-07-30 | 1986-02-22 | 新明和工業株式会社 | Work vehicle safety equipment |
| JPS61183090A (en) * | 1985-02-08 | 1986-08-15 | 金剛株式会社 | Control circuit for attachment device of overhead travellingcrane |
| JPS624199A (en) * | 1986-05-23 | 1987-01-10 | 新明和工業株式会社 | Safety equipment for aerial work vehicles |
| CN102020212A (en) * | 2010-12-01 | 2011-04-20 | 安徽星马汽车股份有限公司 | Mobile hydraulic safety device of overloading restart of hoisting vehicle |
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