Combination weighing apparatus for performing combination calculation to reduce frequency of detective discharge

Abstract

A combination weighing apparatus () according an embodiment includes: a conveyance unit (to) that conveys articles (M) given from an outside; a plurality of weighing hoppers (to) that temporarily store the articles (M) conveyed by the conveyance unit (to) and then discharge the articles (M) downstream; a weighing unit (to) that weighs a weight value of the article (M) stored in each of the plurality of weighing hoppers (to); and a control unit () that performs combination calculation based on a plurality of the weight values measured by the weighing unit (to) and a target value (X) and discharges a specific article (M) selected by the combination calculation from the weighing hopper (to), wherein the control unit (): multiplies an average weight (m) value per unit number of articles (M) within a predetermined period by the number (C) of articles (M), calculates a multiplication result closest to the target value (X) from among results of the multiplication as a reference weight value (T), and performs predetermined processing based on a difference between the target value (X) and the reference weight value (T).