American selection, rate of work display null

摘要

PURPOSE:To display measured weight and operation efficiency at the same time by providing a limit switch to the discharge opening of a grain tank, calculating an increment in the weight when grains flow without being jammed and finding the operation efficiency, and displaying the operation efficiency. CONSTITUTION:Hulled rice which is fed in the grain tank 13 from a selecting device 11 is mounted on a weigher 20 from the discharge opening 13a and put in a rice bag 35, and its weight is displayed on a weight display 22. At this time, no hulled rice stays on a grain sensor 14 and a shutter 15 is held open, so both the grain sensor 14 and limit switch 16 turn off, so that weight sampling is carried out. The current value is denoted as (W1), the set time (T) of a timer is read in to perform weight sampling a constant time T later, and the value is denoted as (W2). A workload per unit time is calculated by dividing W2-W1 by T to calculate the operation efficiency, which is displayed on an operation efficiency display 23.