| 摘要 |
The bed support surface consists of interleaved transverse planks 14, 21, 32, (42; Figure 1), which form three groups attached to driving means which perform separate movements under automatic control. The main bedframe carries planks 14 and is fixed in the central region 10 but can pivot at the upper 12 and lower 13 regions to lift the patient's back and legs by way of drive cylinder 54 and linkages 51-58. A second frame 20 reciprocates planks 21 vertically above or below the level of planks 14 to provide alternating support to the patient by way of a similar cylinder 64 and linkages 61-68. Planks 32(42) are each attached to a cylinder-driven rotary shaft (31, 41; Figure 8) running longitudinally of the bed which lifts the planks perform left/right turning of the patient's body. The cylinders 54,64 may alternatively act directly without any linkages.
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