| 摘要 |
A work support which assists in the inversion of a large workpiece has a supporting frame and a top frame. The top frame is provided with an intermediate hinge and an end hinge along at least one end, so as to be collapsible, and the leg of the supporti ng frame is hinged along the opposite end. The workpiece can be moved to one side of the intermediate hinge and the top frame can be collapsed, lowering the centre o f gravity of the workpiece and standing it partially on edge. One or two workers can then easily shift the workpiece over to the other side of the top frame. When the top frame is raised back to a horizontal position the work surface is in an inverted condition, exposing unfinished surfaces for finishing. In the preferred embodiment the top frame is provide d with a flexible membrane overlaying the intermediate hinge. When the top frame is collapsed the membrane curls upwardly and forms a cushion which supports the edge of t he workpiece, and thus assists in the inversion process. In the preferred embodiment the collapsing and raising of the top frame is assisted by an actuator such as a pneumatic piston.
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