| 摘要 |
<p>A safety unit (11) in the form of a network or mesh for location across an opening to receive and restrain an object falling into the opening characterised in that the network or mesh is in the form of a trellis (12) comprising: a first array (13) of parallel rigid members (13A); a second array (14) of parallel rigid members (14A); and pivoting means whereby each member (13A) of the first array (13) is pivotably attached to at least some of the members (14A) of the second array (14) so that the first and second array can be pivoted relative to one another between a first, housed, configuration wherein the difference between the width (W') of the trellis (12) and the length (L') of the trellis (12) tends to a maximum; and a second, opened, configuration wherein the difference between the width (W) of the trellis (12) and the length (L) of the trellis (12) tends to a minimum; the trellis (12) being adapted for horizontal location in at least its opened configuration in a zone into or through which falling objects tend to pass by being supported at or near the periphery of the trellis (12) so as to retain falling objects contacting the trellis (12) in a region lying within the periphery.</p> |
