| 摘要 |
PURPOSE:To facilitate effective loading work by providing links, foldable by the driving mechanism, placed facing each other on the bed of a truck and upper members, storable on the bed, pivoted on the links serving as supporters of a cover. CONSTITUTION:Links 1, 1' consisting of upper side 3 and bottom side 4 are placed facing each other on the bed 2 and upper members 7 that serve as supporters of a cover 10, vertically moving according to the extension and collapsing of the links 1, 1'. The top of a wire 13 wound around a drum 14 via a pulley 12 is fixed to the upper members 7 and the end of the wire to the drum 14. When the drum 14 engaged to a worm gear 15 and worm wheel 16, is rotated, the links 1, 1' are collapsed by the action of a pivot 8 and a tapered part 9, 9' descending the upper members 7, and when the drum is rotated in the opposite direction, the upper members 7 returns to the top by the force of a spring 11. |
