| 摘要 |
PURPOSE:To make it possible to move a shaft rod up and down, by cooperating an action jack and a motor with a rotary regulator connecting a shaft rod in an up-and-down movable manner through a connection part comprising a hollow cylinder. CONSTITUTION:An action jack is constituted so as to apply the principle of a lever and h1, h2 and h3 are cooperated and theta1 is kept constant while O2 is changed to move a M-part (motor part) up and down. That is, when the M-part is raised, a grip is lowered by the distance corresponding to a test tube stroke by input. When the test tube stroke is set to h4, the grip is lowered by h4. When the M-part is lowered, said M-part lowers to the position of a stopper automatically under its own wt. The action jack is one wherein theta1 takes a constant value of 15 deg., 40 deg.<=theta2<=160 deg., h1=45cm, h2=16cm and h3=20cm. |
