| 摘要 |
It includes barrier elements (2) delimiting substantially vertical apertures (4), each equipped with a blocking bar (5) mounted so as to tilt around a tilting pin (6) close to the upper end of a barrier element (2) adjacent to the aperture (4), and latching means comprising a latching bar (7) mounted so as to pivot around a pivoting pin (8) fixed to the barrier element substantially vertically in line with the tilting pin (6) of the corresponding blocking bar (5), the latching bar being articulated to a control bar (9) extending substantially horizontally and having a latching end extending close to the tilting pin (6) of the blocking bar (5). <IMAGE>
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