| 摘要 |
A device for levelling a sand layer (1) at the landing place of various jumping events, which device includes rails (2) on either side of the sand layer and a trolley (3) travelling back and forwards on them, which in turn includes at least a rake member (4) for loosening the sand layer, a sand-moving member (5.1, 5.2) for filling pits, and a levelling member (6) for levelling the loosened sand layer, as well as devices for moving these in a vertical direction. The sand-moving member consists of several parallel V-ploughs (5.1) pointed in the opposite direction to the levelling direction and a transverse bar (5.2) or similar together with support devices, moving after the rake member (4).
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