US Patent 11297751 Component mounting line

An automatic exchanging device for moving in an arrangement direction of multiple component mounting machines alongside the front face of a component mounting line to set feeders to and/or remove feeders from a feeder setting base of each component mounting machine, and a control device for controlling the movement of the automatic exchanging device. The control device monitors the operational states of the multiple component mounting machines and, when an error requiring the work of the operator occurs in any one of the component mounting machines, sets a predetermined range including the component mounting machine to a movement prohibited area of the automatic exchanging device to move the automatic exchanging device out of the movement prohibited area until it is determined that the work is completed.