| 摘要 |
PURPOSE:To ensure the clamp force of a test piece, by providing both grasping device to a mount frame constituted so as to be elastically deformed or displaced through an elastomer by repulsive force at the time of clamping corresponding to the displacing component of the test piece in the grasping direction thereof due to testing load. CONSTITUTION:When a test piece T is clamped by a clamp screw 4, the mount frame 11 of a fixing side grasping jig 2 and the mount frame 12 of movable side grasping jig 3 and the clamp screw 4 constituting a clamp means are elastically deformed to the direction shown by an arrow A by clamping repulsive force based on the presence of notches 11a, 12a respectively provided to both of mount frames 11, 12. The degree of elastic deformation is determined by the degree becoming thin in the thickness of the grasped test piece T due to a tensile test. That is, when the test piece T is thinly deformed by DELTAl in the grasping direction (A-direction) by the testing load applied to the test piece T, the elastic deformation due to clamping repulsive force is pref. set to DELTAlor more. When the test piece T becomes thin by testing load, the mount frames 11, 12 trail this to restore and the distance between the grasping jigs becomes short and the clamping force of the test piece T is ensured.
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