JPS57198149A - Safety device for car with boom - Google Patents

Safety device for car with boom

Info

Publication number
JPS57198149A
JPS57198149A JP8332981A JP8332981A JPS57198149A JP S57198149 A JPS57198149 A JP S57198149A JP 8332981 A JP8332981 A JP 8332981A JP 8332981 A JP8332981 A JP 8332981A JP S57198149 A JPS57198149 A JP S57198149A
Authority
JP
Japan
Prior art keywords
boom
jack
cylinder
electrical contact
operated
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
JP8332981A
Other languages
Japanese (ja)
Inventor
Hideki Miyake
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.)
Shinmaywa Industries Ltd
Original Assignee
Shin Meiva Industry 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 Shin Meiva Industry Ltd filed Critical Shin Meiva Industry Ltd
Priority to JP8332981A priority Critical patent/JPS57198149A/en
Publication of JPS57198149A publication Critical patent/JPS57198149A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms

Abstract

PURPOSE:To prevent wrong operation and turning-over of a car by prohibiting the boom-related operation when a jack is not elongated. CONSTITUTION:An electrical contact LSI which is OFF-operated by a dog 24 when a boom 3 is in stored state is installed on the storing stay 23 of the boom 3, and the electrical contact LS2 which is OFF-operated when a jack cylinder 12 is elongated over a certain length is installed on a jack 11. If the boom 3 is operated erroneously and is departed from the stay 23, when the jack 11 is in no-elongation state by the operation of the cylinder 12, the electrical contact LSI is switched, and the electromagnetic part 22a is brought into conduction state. Through said conduction, the electromagnetic change-over valve 22 is switched to the lower position to allow the discharge oil from a pump 14 to circulate into an oil reservoir, and feeding of pressurized oil to the motor 7 for a turning base 2, the rising and falling cylinder 8 for boom 3, and the change-over valve group 15-17 of the expansion cylinder 9 for elongating and contracting boom is intercepted, and the boom-related operation can be prohibited.
JP8332981A 1981-05-29 1981-05-29 Safety device for car with boom Pending JPS57198149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8332981A JPS57198149A (en) 1981-05-29 1981-05-29 Safety device for car with boom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8332981A JPS57198149A (en) 1981-05-29 1981-05-29 Safety device for car with boom

Publications (1)

Publication Number Publication Date
JPS57198149A true JPS57198149A (en) 1982-12-04

Family

ID=13799384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8332981A Pending JPS57198149A (en) 1981-05-29 1981-05-29 Safety device for car with boom

Country Status (1)

Country Link
JP (1) JPS57198149A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217599A (en) * 1983-05-24 1984-12-07 極東開発工業株式会社 Hydraulic operation actuator for boom and outrigger in height service car
JPH01115698U (en) * 1988-01-28 1989-08-03
CN111792596A (en) * 2020-07-22 2020-10-20 长沙远大模块集成科技有限公司 Overturning equipment and overturning method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52152055A (en) * 1976-06-10 1977-12-17 Tadano Tekkosho:Kk Self-travelling crane fall-preventing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52152055A (en) * 1976-06-10 1977-12-17 Tadano Tekkosho:Kk Self-travelling crane fall-preventing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217599A (en) * 1983-05-24 1984-12-07 極東開発工業株式会社 Hydraulic operation actuator for boom and outrigger in height service car
JPH0375480B2 (en) * 1983-05-24 1991-12-02 Kyokuto Kaihatsu Kogyo Co
JPH01115698U (en) * 1988-01-28 1989-08-03
CN111792596A (en) * 2020-07-22 2020-10-20 长沙远大模块集成科技有限公司 Overturning equipment and overturning method thereof

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