| 摘要 |
A retractable cover system for a tipper trailer body (11) of a truck includes a cover (30) for the top of the trailer body (11), and a winder pulley (52) for controlling the movement of the cover (30) across the top of the trailer body (11). An endless cable (53) which connects to the cover (30), has its movement controlled by the winder pulley (52) and a plurality of support pulleys (44, 45, 46, 47, 48, 59, 60) also support the movement of the endless cable (53). The arrangement of the support pulleys (44 to 48, 59, 60) and endless cable (53) is such that by operation of the winder pulley (52), the cover is retractably moved over the top of the trailer body (11).
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