| 摘要 |
A safety support comprising a plate with ribs and a U-shaped upper part with two latera1 branches and an upper base zone. The two lateral branches each comprise an articulation zone including pivoting axles extending parallel to the plane defined by the upper part and two superposed connecting zones, which are mutually linked by an assembly part, each having a bore for its respective pivoting axle. Moreover, each articulation zone comprises at least three pivoting axles, the connecting zone have each an arc-shaped part, defined by two flattened zones extending parallel to the plane, and the two neighboring articulation pins are each mutually linked by two assembly parts.
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