| 摘要 |
A hold-down device for movable jaw of a vise comprises a driving block and a movable jaw member. The driving block is provided with a through hole having therein a rigid sleeve. The movable jaw member comprises therein a drive shaft in such manners that the drive shaft passes through the sleeve and that both ends of the drive shaft are able to rotate. Located between the sliding portion of the driving block and the sliding groove of the vise base is a predetermined clearance, within which the driving block moves upwardly. A screw is permitted to pass through the screw hole of the movable jaw member to press against the side adjacent to the driving block and the screw hole so as to permit the angle formed by the surface of the vise stand and the connection line, which is formed by the contact point of the sleeve and the drive shaft and the drive shaft axial line, to be greater than zero degree and smaller than 90 degrees.
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