| 摘要 |
<p>PURPOSE:To minimize the influence of gravitation and to surely operate an arm by forming the arm in such a shape that the central position of a turning hole can agree with the center gravity of the tension regulation arm. CONSTITUTION:The tension regulation arm has a tension post 1 at its tip, and is constructed of a main arm 2 equipped with the one end side of a band in the vicinity of the post and a subarm 4 which has a balance weight 3 and is equipped with the one end side of a spring in the vicinity of the weight. Not to cause angular moment around a turning hole 5 with its center as a reference, a weight 4 with a fixed mass and a fixed shape is fitted on the side of the subarm 4, and the arm center gravity position agrees with the central position of the turning hole 5.</p> |
