| 摘要 |
A track assembly comprises an inner channel member, an outer channel member and a top plate, through which load bearing rollers selectively protrude An inflatable air bag is between the inner and outer channels for raising and lowering the inner channel. The rollers are attached to the inner channel and are raised and lowered to a recessed state as the air bag raises and lowers the inner channel. An air line fitting at one air bag end passes through the outer channel member side wall to fix the air bag end longitudinally in place. The other end is clamped by two plates sandwiching the air bag end therebetween. One of the clamp plates has two opposing tabs extending therefrom and which engage mating slots in the side walls of the outer channel. As the bag inflates and deflates, the clamp tabs permit the air bag end to ride up and down vertically wherein the tabs ride up and down in the slots. This keeps the bag end longitudinally in place without adding additional fixation components. The tabs and slots are arranged to preclude binding of the tabs as the bag is moved. |
