| 摘要 |
A vise for holding a workpiece, comprising a pair of generally opposed jaws having substantially planar faces, a clamping screw having at least one external thread centered around a longitudinal axis rotatably attached at one end to one of the jaws and passing through the other jaw, a clamping screw nut having at least one internal thread occupying an arc of no more than approximately 180 DEG and having a substantially planar forward face for bearing against a substantially planar and parallel rear face of the other jaw when the clamping screw is rotated to draw the jaws together and both the forward and rear faces are oblique to the axis of the clamping screw, a rod attached to a handle that, when depressed, moves the rod so that its movement moves the nut substantially transverse to the axis of the clamping screw, a foot pedal attached to an actuator that, when the foot petal is depressed, moves the clamping nut substantially transverse to the axis of the clamping screw, at least one guide rod rigidly attached at one end to one of the jaws, and an elastic cord attached between the other end of the guide rod and the other jaw.
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