| 摘要 |
PURPOSE:To prevent interlayer delamination or damage due to the stress concn. of a fiber reinforced plastic rotor, by arranging a specimen container so as to flushing both end parts thereof with at least both ends of the piercing hole of a rotor or protruding the same from said both ends. CONSTITUTION:In a vertical type rotor wherein the rotary shaft 2 of a rotor 1 and the piercing holes for holding a specimen containers 4 in an inserted state are provided in parallel, the specimen containers 4 are allowed to coincide with the upper surface 5 of the rotor 1 at the upper ends thereof and held so as to hold all of the lower ends of said containers in the piercing holes 3 in a state coinciding with the lower surface 6 of the rotor 1. When the rotor 1 is rotated at a high speed in this state, the pressing forces of the containers 4 are uniformly applied to the whole of the hole walls of the piercing holes 3 and the values thereof can be suppressed low and, therefore, stress concn. to the hole wall surfaces and damage are prevented.
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