MULTIPLE BALANCE DEVICE

PROBLEM TO BE SOLVED: To weigh various kinds of luggage of different lengths using the same device and to enhance the measuring efficiency in terms of time. SOLUTION: Two conveyor balances 11, 12 having load cells or the like and differing in length are arranged in series along a conveyor line, and an input conveyor 13 and an output conveyor 14 are placed, respectively, upstream and downstream of the conveyor balances 11, 12. Photoswitches 15, 16, 17 for detecting the presence of luggage A are provided in front of and behind the conveyor balance 11. Further, the output values of the conveyor balances 11, 12 and the outputs of the photoswitches 15, 16, 17 are connected to a computation means, where the output of the conveyor balances 11, 12 are combined in accordance with a measurement sequence, so that medium-length luggage A is weighed by only the upstream conveyor balance 11 and short luggage A is weighed by only the downstream short conveyor balance 12, while for long luggage A the total of the weights measured by the upstream and downstream conveyor balances 11, 12 is used as its weight measurement.