JPS5249555A - Apparatus for preventing over-load operation of crane - Google Patents

Apparatus for preventing over-load operation of crane

Info

Publication number
JPS5249555A
JPS5249555A JP11783975A JP11783975A JPS5249555A JP S5249555 A JPS5249555 A JP S5249555A JP 11783975 A JP11783975 A JP 11783975A JP 11783975 A JP11783975 A JP 11783975A JP S5249555 A JPS5249555 A JP S5249555A
Authority
JP
Japan
Prior art keywords
crane
load operation
preventing over
over
preventing
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
Application number
JP11783975A
Other languages
Japanese (ja)
Inventor
Hisanori Uchino
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP11783975A priority Critical patent/JPS5249555A/en
Publication of JPS5249555A publication Critical patent/JPS5249555A/en
Pending legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)

Abstract

PURPOSE: To provide an apparatus for preventing over-load operation of crane, in which a memory unit is provided for producing a signal corresponding to the length of boom and derrick angle, whereby over-load operation of crane is positively detected and reliability is increased.
COPYRIGHT: (C)1977,JPO&Japio
JP11783975A 1975-09-29 1975-09-29 Apparatus for preventing over-load operation of crane Pending JPS5249555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11783975A JPS5249555A (en) 1975-09-29 1975-09-29 Apparatus for preventing over-load operation of crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11783975A JPS5249555A (en) 1975-09-29 1975-09-29 Apparatus for preventing over-load operation of crane

Publications (1)

Publication Number Publication Date
JPS5249555A true JPS5249555A (en) 1977-04-20

Family

ID=14721526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11783975A Pending JPS5249555A (en) 1975-09-29 1975-09-29 Apparatus for preventing over-load operation of crane

Country Status (1)

Country Link
JP (1) JPS5249555A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104695870A (en) * 2015-03-11 2015-06-10 中国矿业大学 Intelligent vertical shaft sinking derrick

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509458A (en) * 1973-05-22 1975-01-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509458A (en) * 1973-05-22 1975-01-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104695870A (en) * 2015-03-11 2015-06-10 中国矿业大学 Intelligent vertical shaft sinking derrick

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