| 摘要 |
<p>The device has side walls (4) arranged adjacently on a cover plate (1) and pivotably linked at the cover plate. A set of edges (6) limit the side walls that are detachably connected to each other. The sidewalls adjacent to the edges exhibit a projection during turning of the side walls and are locked with each other by a recess. The sidewalls comprise an attachment piece that pushes sidewalls to a joint area arranged at the cover plate during turning of the side walls in an angle ranging from 60 to 90 degree against the cover plate. The cover plate and the side walls are made of plastic foam.</p> |
