| 摘要 |
PURPOSE:To make the suspending position of a cable constant, by providing a moving pulley, which changes the direction of the cable into the direction in parallel with the moving direction of a slider, at the slider, which is guided along a guide shaft by the forward and reverse rotation of a drum and advanced by a screw motion in parallel with a drum shaft. CONSTITUTION:A liquid level sensing body such as a float 20 or a displacer is suspended by the tip of a cable 19 to the liquid surface. The cable 19 is wound around or extended from a drum 11 in a spiral mode by the forward and reverse rotation of the drum. A slider 25 is guided along the guide shaft 16 by the rotation of the forward and reverse rotations of the drum 11 and advanced by a screw motion in parallel with a drum shaft 12. A moving pulley 18a, which changes the direction of the cable 19 from the drum 11 into the direction in parallel with the moving direction of the slider 25, is provided at the slider 25. |
