| 摘要 |
Collapsible warning sign, comprising three legs (14) each of which at one end being pivotally connected to a rod (10) and connected intermediately between the ends of said rod through a link (20) to a means (24) which is slideably mounted on said rod so as to pivot between a flat condition, in which said legs are arranged along said rod, and an erect condition, in which said legs are pyramidally spread out with said rod positioned centrally between said legs. Said means is arranged as a weight and functions thus as a load to keep said legs in said spread out condition. A wire (25) is in one end connected to said weight and in the other end connected to said rod so as to slide said weight along said rod and thereby pivoting said legs to the flat condition when the warning sign is lifted in said wire. |
