Whether or not a lead wire has been normally cut and clinched can be reliably detected. A contact pipe is arranged in lead wire insertion holes of a pair of fixed pawls in a state of being electrically insulated from the fixed pawls. In a case where the lead wire is shorter than a set length after the lead wire is inserted into the lead wire insertion holes, a clearance of the pair of lead wire insertion holes is widened by a set amount in the event of outward bending of the lead wire and is narrowed by a set amount in the event of inward bending. A cut-and-clinch operation is performed with S4 bypassed in a case where the length of the lead wire is at least the set length.