JPS6429537A - Pantagraph type expansion mast - Google Patents
Pantagraph type expansion mastInfo
- Publication number
- JPS6429537A JPS6429537A JP18551587A JP18551587A JPS6429537A JP S6429537 A JPS6429537 A JP S6429537A JP 18551587 A JP18551587 A JP 18551587A JP 18551587 A JP18551587 A JP 18551587A JP S6429537 A JPS6429537 A JP S6429537A
- Authority
- JP
- Japan
- Prior art keywords
- link
- links
- counterposed
- bendable
- laid
- 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
- Tents Or Canopies (AREA)
Abstract
PURPOSE: To improve rigidity and simplify extending/contracting works by laying X-shaped links and horizontal telescopic beam members between the ends of links 30 which are bendable at the middle and counterposed at respective stages of parallelly formed supports. CONSTITUTION: Supports 47 in which links 30 bendable at the middle are longitudinally connected in multiple stages are parallelly arranged, and X-shaped links 28 are laid between the ends of the links 30 counterposed in respective stages, and further, horizontal telescopic beam members 29 are laid between the ends across them. In an extensible mast 20 constituted as above, when the beam member 29 contracts and the link 30 bends to the closing side of the link 28, the support 47 extends, and when the bent member is moved to the opening side of the link 28, the beam member 29 extends and the link 30 is returned to the opening side of the link 28 and the support 47 is folded. In this way, the rigidity of the trussed structure can be improved and the extending/ contracting work time can be shortened.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18551587A JPS6429537A (en) | 1987-07-27 | 1987-07-27 | Pantagraph type expansion mast |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18551587A JPS6429537A (en) | 1987-07-27 | 1987-07-27 | Pantagraph type expansion mast |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6429537A true JPS6429537A (en) | 1989-01-31 |
Family
ID=16172135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18551587A Pending JPS6429537A (en) | 1987-07-27 | 1987-07-27 | Pantagraph type expansion mast |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6429537A (en) |
-
1987
- 1987-07-27 JP JP18551587A patent/JPS6429537A/en active Pending
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