Patent ID: 8246025

Claim:
A vise assembly comprising: a support rod standing on a base of a bench circular sawing machine; an arm connected to the support rod and projecting frontward into a cutting region; and a clamping rod disposed at a front end portion of the arm, configured to be movable upward and downward, and capable of holding a workpiece placed in the cutting region, wherein the arm comprises a first arm and a second arm, the first arm and the second arm are parallel to each other, the second arm defines a through hole and a cam hole, the first arm and the second arm are located above the cutting region, a rear end portion of the first arm is pivotally fixed along a distal end of the support rod and projecting frontward, the second arm has a front end portion at which the clamping rod is disposed and a rear end portion connected to a front end portion of the first arm in such a manner that the second arm is horizontally swingable and capable of being retained at any angular position, the rear end portion of the second arm is movable upward and downward and capable of being retained at any vertical position, the clamping rod comprises a threaded portion at an entire circumference thereof and runs through the second arm with a through hole, and the cam hole has an inner surface which circumferentially changes in distance from a center of the through hole is provided inside the through hole, the vise assembly further comprises a pair of nuts and a nut holder, wherein the pair of nuts which are slidable circumferentially along the inner surface of the cam hole and each of which has an opposed surface provided with an internal thread engageable with the threaded portion of the clamping rod are held by the nut holder in a manner that renders the pair of nuts radially movable while keeping the pair of nuts in positions axisymmetric to each other inside the cam hole, the nut holder is configured such that an operation of turning the clamping rod causes the nut holder to turn, to thereby change in a phase of the pair of nuts, a selection can be made between a separate position and an engaging position, the separate position has the pair of nuts being most distant from the center of the through hole to render the clamping rod freely movable in an axial direction thereof, the engaging position has the pair of nuts being nearest to the center of the through hole to render the clamping rod adjustable in an axial position thereof through an operation of turning the clamping rod; and a position indicator provided at the nut holder and configured to protrude from the second arm to indicate an angular position of the nut holder.