| 摘要 |
<p>In a clamp device having a clamp main body (1), a gripping member (2) which is expandable and contractible in the radial direction and is inserted into an aperture in a workpiece and grip the inner circumferential surface of that aperture, a clamp rod (3) including a tapered shaft portion that fits into and engages with the gripping member (2), and a drive means (4) for driving the clamp rod (3) forwards and backwards, there are also provided with a support mechanism (5) that supports the gripping member (2) by fluid pressure when the gripping member (2) is radially expanded, and a fluid pressure release means that releases all or a part of the fluid pressure of the support mechanism (5) after radial expansion of the gripping member (2) when the clamp rod (3) is driven by the drive means (4) to perform clamping, the support mechanism (5) having an annular pressure reception member (51) that supports a base end of the gripping member (2), and a supporting fluid chamber (52) that causes fluid pressure in the direction opposite to the clamping direction to be received on an annular cylindrical portion (53) of the annular pressure reception member (51).</p> |
