JPS5467955A - Horizontal retraction type crane - Google Patents
Horizontal retraction type craneInfo
- Publication number
- JPS5467955A JPS5467955A JP13350077A JP13350077A JPS5467955A JP S5467955 A JPS5467955 A JP S5467955A JP 13350077 A JP13350077 A JP 13350077A JP 13350077 A JP13350077 A JP 13350077A JP S5467955 A JPS5467955 A JP S5467955A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- hydraulic cylinder
- load
- attached
- speed
- 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)
Abstract
PURPOSE: To smooth the crane operation and heighten the efficiency of hydraulic circuit, by adjusting the set pressure of relief valve depending on the load, pressure and speed of hydraulic cylinder.
CONSTITUTION: A load meter 38 is attached to the tip of piston rod 6 of a hydraulic cylinder 5. Pressure detectirs 39a, 39b are attached to the hydraulic cylinder 5. A speed detector 33 is attached to an accelerator 37 for a screw rod 36 coupled to the tip of the piston rod 6. The load meter 38, the pressure detectors 39a, 39b and the speed detector 33 are connected to a calculator 35. The load and pressure applied to the hydraulic cylinder 5 and the speed of expansion and contraction of the cylinder 5 are detected by the load meter 38, the pressure detectors 39a, 39b and the speed detector 33. The calculator 35 performs calculations to control a proportional pressure control solenoid valve 28 and proportional flow rate solenoid valves 29, 29' through an amplifier 32. The set pressure of the hydraulic circuit is so varied that the hydraulic cylinder 5 operates smoothly.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13350077A JPS6030639B2 (en) | 1977-11-09 | 1977-11-09 | horizontal retractable crane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13350077A JPS6030639B2 (en) | 1977-11-09 | 1977-11-09 | horizontal retractable crane |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5467955A true JPS5467955A (en) | 1979-05-31 |
JPS6030639B2 JPS6030639B2 (en) | 1985-07-17 |
Family
ID=15106214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13350077A Expired JPS6030639B2 (en) | 1977-11-09 | 1977-11-09 | horizontal retractable crane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6030639B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102887435A (en) * | 2012-10-19 | 2013-01-23 | 中联重科股份有限公司 | Hydraulic system for controlling amplitude variation of boom, control method and crane |
CN106044569A (en) * | 2016-07-05 | 2016-10-26 | 武汉船用机械有限责任公司 | Control method and control system for stern gantry crane |
-
1977
- 1977-11-09 JP JP13350077A patent/JPS6030639B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102887435A (en) * | 2012-10-19 | 2013-01-23 | 中联重科股份有限公司 | Hydraulic system for controlling amplitude variation of boom, control method and crane |
CN106044569A (en) * | 2016-07-05 | 2016-10-26 | 武汉船用机械有限责任公司 | Control method and control system for stern gantry crane |
Also Published As
Publication number | Publication date |
---|---|
JPS6030639B2 (en) | 1985-07-17 |
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