PURPOSE:To set a sample to be examined easily and to eliminate the influence in the horizontal direction on the sample owing to the tension variation of a hanging wire by providing a spring of a constant tension on the way of the wire to hanging the sample. CONSTITUTION:By cutting off the fixing member with an artificial satellite 1, a sample 2 to be examined makes a developing movement in the direction of the arrow 7. In this case, a tensile force P 12 which can hang a mass same as that of the sample 2 is imposed to a wire to hang the sample 2. When the rotation axis of the development mechanisms 3a and 3b of the sample 2 and the rotation axis of the rotary part 10 of a test device are slipped from each other by a minute angle, the distance between the sample 2 and an arm 9 is extended or reduced gradually from the development mechanism 3 to the tip of the sample 2 following the development of the sample 2. In this case, since a spring 15 is extended or contracted in response to the variation of the length while maintaining the variation of the tension P12 at the minimum value, the variation in the rotational friction force in the development mechanism 3 generated following the developing movement can be maintained at a minute value.
展开▼
