JPS5442757A - Truck crane - Google Patents
Truck craneInfo
- Publication number
- JPS5442757A JPS5442757A JP10899377A JP10899377A JPS5442757A JP S5442757 A JPS5442757 A JP S5442757A JP 10899377 A JP10899377 A JP 10899377A JP 10899377 A JP10899377 A JP 10899377A JP S5442757 A JPS5442757 A JP S5442757A
- Authority
- JP
- Japan
- Prior art keywords
- crane
- boom
- switch
- closed
- counterweight
- 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
- Control And Safety Of Cranes (AREA)
Abstract
PURPOSE: TO ensure safe operation of a truck crane, without immpairing performance of the same, by providing a switch which is closed when a counterweight is placed on the rear end of a crane supporting bed and thus disabling boom derricking motion of the crane when said switch is in its closed condition.
CONSTITUTION: Switch 18 is arranged on a housing bed such that it is closed or opened when a counterweight is attached to a retainer metal at the rear end of crane supporting bed. When weight 11 is placed on metal 12 while keeping outrigger 19 out of contact with the ground, alarm 30 is actuated immediately if crane is operated by mstake, since limit switches 20 are kept in their OFF-condition, or otherwise shut-off valve 29 is shifted to its "open" position, so that derricking motion of boom 6 is disabled by relief valve 27 when no load is acted to the boom 6
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10899377A JPS5442757A (en) | 1977-09-09 | 1977-09-09 | Truck crane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10899377A JPS5442757A (en) | 1977-09-09 | 1977-09-09 | Truck crane |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5442757A true JPS5442757A (en) | 1979-04-04 |
Family
ID=14498857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10899377A Pending JPS5442757A (en) | 1977-09-09 | 1977-09-09 | Truck crane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5442757A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5853788U (en) * | 1981-10-07 | 1983-04-12 | 株式会社日本省力産業研究所 | Simple truck crane fall prevention device |
JP2017088387A (en) * | 2015-11-16 | 2017-05-25 | 株式会社タダノ | Crane truck |
-
1977
- 1977-09-09 JP JP10899377A patent/JPS5442757A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5853788U (en) * | 1981-10-07 | 1983-04-12 | 株式会社日本省力産業研究所 | Simple truck crane fall prevention device |
JP2017088387A (en) * | 2015-11-16 | 2017-05-25 | 株式会社タダノ | Crane truck |
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