JPS6438613A - Automatic weighing and conveying system - Google Patents

Abstract

PURPOSE:To improve the accuracy in weighing at low cost by a system wherein a material weighing machine having a prescribed weighing accuracy and a controller therefor are set on an unmanned guided car and the car is stopped at a desired station by a running control means and supplied thereat with a material from material supplying equipment. CONSTITUTION:Vibrating feeders 21a-27a are suspended at discharging open ends of storage hoppers 21-27 respectively, and the sizes of troughs of the feeders are varied in accordance with the respective supply amounts and accuracy thereof. Unmanned cars 28 and 29 run under a radio guidance in conformity with a prescribed program. Now, when the unmanned car 28 is supplied, at its weighing hopper 34, with a material A from the hopper 21 and a weight detection signal of a load cell 35 turns equal to a set value, a drive stop signal is sent from an antenna 32a and thereby the feeder 21a is stopped. Next the unmanned car 28 moves to the position of a mixer and discharges the material A into the mixer. In this way, the unmanned cars 28 and 29 run sequentially to each station to be supplied with a material in a set amount corresponding to the weighing accuracy of the respective hoppers 34 and 40 and then discharge the respective materials A-G into the mixer. Therefore each material of a prescribed allotment is supplied into the mixer.