JPS54120163A - Alarm system for restricting revolving motion of mobile crane - Google Patents
Alarm system for restricting revolving motion of mobile craneInfo
- Publication number
- JPS54120163A JPS54120163A JP2594478A JP2594478A JPS54120163A JP S54120163 A JPS54120163 A JP S54120163A JP 2594478 A JP2594478 A JP 2594478A JP 2594478 A JP2594478 A JP 2594478A JP S54120163 A JPS54120163 A JP S54120163A
- Authority
- JP
- Japan
- Prior art keywords
- crane
- magnetic
- restricting
- revolving motion
- indicator
- 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
- Jib Cranes (AREA)
Abstract
PURPOSE: To provide an alarm system for restricting revolving motion of mobile crane, in which alarm is actuated when position of a magnetic needle that is turned in response to earth magnetism comes to a limit position determined by positions of magnetic-electric converting elements, whereby it is enabled to assemble the system in the body of crane and to follow up the motion of crane correctly.
CONSTITUTION: In the front panel, there are provided an indicator 2 for indicating the revolving direction of crane and a selector for determining the range for restricting the revolving motion of crane. At the center of indicator 2, there is provided a magnetic needle 4 which is turned in response to the earth magnetism, and magnetic-electric converting elements N1WNn arranged in annular form around the periphery of indicator 2 give an electric output in response to the magnetism released from pole 5 of the needle 4. If a switch corresponding to the element Nx is closed, electric output obtained after magnetic-electric conversion is amplifier via the switch and afforded to acoustic signal generating means and a relay circuir for forcibly stopping the revolving motion of crane, whereby switches located at opposite ends of safety zone are closed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594478A JPS54120163A (en) | 1978-03-09 | 1978-03-09 | Alarm system for restricting revolving motion of mobile crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2594478A JPS54120163A (en) | 1978-03-09 | 1978-03-09 | Alarm system for restricting revolving motion of mobile crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54120163A true JPS54120163A (en) | 1979-09-18 |
Family
ID=12179856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2594478A Pending JPS54120163A (en) | 1978-03-09 | 1978-03-09 | Alarm system for restricting revolving motion of mobile crane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54120163A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931324A (en) * | 1982-08-13 | 1984-02-20 | Kubota Ltd | Excavating working vehicle |
| JPS59190192A (en) * | 1983-04-14 | 1984-10-27 | 株式会社竹中工務店 | Safety device on cargo work of crane |
| JPS6081996U (en) * | 1983-11-09 | 1985-06-06 | 日立建機株式会社 | Crane rotation angle display device |
| US20140000508A1 (en) * | 2012-06-27 | 2014-01-02 | Delphi Technologies, Inc. | Needle indicator oriented by periphery electromagnets |
| JP2021185113A (en) * | 2019-11-20 | 2021-12-09 | Ｎｅｃプラットフォームズ株式会社 | Direction detecting system, construction machine provided therewith, and direction detecting program |
-
1978
- 1978-03-09 JP JP2594478A patent/JPS54120163A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931324A (en) * | 1982-08-13 | 1984-02-20 | Kubota Ltd | Excavating working vehicle |
| JPS59190192A (en) * | 1983-04-14 | 1984-10-27 | 株式会社竹中工務店 | Safety device on cargo work of crane |
| JPS6081996U (en) * | 1983-11-09 | 1985-06-06 | 日立建機株式会社 | Crane rotation angle display device |
| US20140000508A1 (en) * | 2012-06-27 | 2014-01-02 | Delphi Technologies, Inc. | Needle indicator oriented by periphery electromagnets |
| JP2021185113A (en) * | 2019-11-20 | 2021-12-09 | Ｎｅｃプラットフォームズ株式会社 | Direction detecting system, construction machine provided therewith, and direction detecting program |
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