| 摘要 |
PURPOSE:To finish a test without changing the tensile force applied to a test piece throughout a testing period, by forming both of the wt. side lever and test piece side lever of a lever into a fan shape having a fulcrum as the pivot. CONSTITUTION:Since a test piece 7 extends during testing and a wt. side lever 2a moves downwardly in this tester, as the standard of this movement, an angle scale 22 is provided to the lever 2a in the vicinity of the fulcrum 1 on said lever 2a and an indicator 23 is mounted to an upper support stand 14. Whereupon, the test piece 7 is pulled using a jack 12 before the A-position of the lever 2a becomes parallel to the surface of a floor and the indicator 23 is set to the zero point of the scale 22 to make it possible to bring the lever to the same state as that at the point of time when the test is started. Further, in this tester, the wt. side lever 2a and test piece side lever 3a of this lever are together formed into a fan shape, and a wt. 5 and the test piece 7 are connected to the leading ends of the wires 17, 18 suspended along the circular arc surfaces of both levers and the wt. 5 is allowed to always fall on the center axis thereof with respect to the rotation of the lever. Therefore, even when the horizontal position of the lever is not considered each time, predetermined load can be held.
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