| 摘要 |
<p>PURPOSE:To lighten driving force by providing a rotary member mounted to a holder holding member setting an optional point on the holder holding members as the center of rotation and mounted freely rotatably to a holder on a point far from the center of rotation by a certain distance and a driving member mounted freely rotatably to the rotary member on a point except two points which are the centers of the above-mentioned mounting. CONSTITUTION:The rotary members 14a and 14c are mounted freely rotatably to the holder 11 on mounting parts 18a and 18c. The mounting parts 16a, 16b and 16c of the rotary members 14a, 14b and 14c are mounted freely rotatably to a holding plate 12 and by moving a driving plate 13 before and behind the rotary members 14a and 14c rotate centering around the mounting parts 16a and 16c so that the holder 11 goes up and down. And the up-and-down member 15 is mounted to the rotary member 14b and has moving quantity larger than the up-and-down moving quantity of the holder 11 with the motions of the driving plate 13 because the leg length of the rotary member 14b is different. Thus, operational force can be reduced and it is possible to easily hold plural members whose up-and-down strokes are different.</p> |
