| 摘要 |
An adjustable clamping device is provided for clamping/shaping work pieces of various dimensions and may be applied for straightening beams, joist, bearers, etc., squaring house frames, positioning form work, or maintaining work pieces in position. The device includes a first clamping member, a second clamping member and an elongate threaded member on which the first and second members are located and arranged for continuous adjustment of relative positions therealong. The second member is fixedly or adjustably located on the elongate member. The first member has cooperating thread engagement arrangement movable between a released position at which the first member is slidingly positional along the elongate member and an engaged position at which the second member cannot slide along the elongate member but is positional by rotating the engagement arrangement in meshing engagement with the elongate member. The device also includes a lever member for moving the engagement means and a biasing part for biasing the engagement arrangement to the engaged position and a maintaining part for maintaining the engagement arrangement at the engaged position, the maintaining part being in the form of a lock nut member or a cam member.
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