JPS5467955A - Horizontal retraction type crane - Google Patents

Horizontal retraction type crane

Info

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
Application number
JP13350077A
Other languages
Japanese (ja)
Other versions
JPS6030639B2 (en
Inventor
Toshiaki Makino
Kenjiro Kasai
Kiyoshi Gomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13350077A priority Critical patent/JPS6030639B2/en
Publication of JPS5467955A publication Critical patent/JPS5467955A/en
Publication of JPS6030639B2 publication Critical patent/JPS6030639B2/en
Expired legal-status Critical Current

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
JP13350077A 1977-11-09 1977-11-09 horizontal retractable crane Expired JPS6030639B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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