| 摘要 |
PURPOSE:To perform desired-quantity measurement securely by providing a mechanism which varies the counter drag of a spring balancing with the descent force of a receiving box containing a body to be measured, and a mechanism which detects the box descending. CONSTITUTION:On a reveiving table 38 applied with weight, a receiving box 30 for a body to be measured is mounted. To the top surface of an arm 39 united with the receiving table 38, a coupling table 40 is fitted in one body. To the top surface of a measurement case 42, a communication shaft 43 is stuck upright, and its lower end runs through the coupling table 40 and the top surface of the arm 39 to guide them up and down. A measuring spring 44 is fitted to the communication shaft 43; its lower end is coupled with the coupling table 40 with a fixation screw 45, and the upper end is engaged with a pressure plate 48, which is moved up and down through a cam 49 to adjust the drag to the spring. Consequently, a dtection mechanism 51 detects the receiving box 30 containing a desired quantity of a body. This is used suitably in combination with a home-service a rice-cleaning machine for rice cleaning. |
