Multi-stage pair of scales metrical type quantitative feeder and multi-stage pair of scales type register

摘要

PURPOSE:To enable shortening of weighing time and highly accurate weighing by decreasing carry-in speed to a weighing hopper by multiple stages to reduce a feeding amount gradually by stages as a fixed amount is approached. CONSTITUTION:Multi-stage balance type weighing devices A1, A2...An are so set that a difference between a front stage detection value and a subsequent stage detection value reduces gradually to 20%, 10% and 5% of a fixed amount, for instance. Constants K1, K2...Kn of a sensor K are closed to generate a pulse wave signal when a weighing receptacle 3 mounted on a weighing tray 2 and the weighing devices A2-An mounted at a weighing end part of the weighing device A1 detects a specified weight and lowers. Receiving the signal, a supply controller 11 detects the completion of a specified value of the tray 2 and the receptacle 3 to control revolutions and stoppage of rotation of a motor 13 for driving a conveying device through a microcomputer control section 12. Thus, a carry-in speed into a weighing hopper decreases by multiple stages and as an amount of feed into the weighing device A1 approaches a fixed amount at its maximum, the amount reduces gradually by stages to obtain a high weighing accuracy.