| 摘要 |
A work bench (10) includes a frame (12), a bench surface on the frame with the bench surface including at least two members (24,26), one of which is movable along the frame for clamping a workpiece between the members (24,26). A mechanism for moving the member includes two screws (30) coupled with the members. The two screws (30) are spaced with the member (24) for moving the member (24) upon rotation of the screws (30). A sprocket (50) is coupled with each of the screws. A transmission belt or chain (56) is coupled with the sprockets (50). At least one handle (100,110) is coupled with one of the screws (30) to rotate the screws. At least one clutch (70) is coupled with the at least one screw (30) to limit clamping pressure on the workpiece. The clutch (70) enables rotation of one screw with respect to the other screw so that workpieces may be clamped between the members (24,26) and clamping of the workpiece may be accomplished by rotation of the screws (30) with one hand of the operator. Also, a guard (80) may be present which covers the transmission belt or chain (56). The handle (100,110) may include a hub (112), a straight portion (114), and curved portion (116) extending from the straight portion. A knob (118) extends from the curved portion. |
