Electrical cable manufacturing method and electrical cable manufacturing apparatus

An electrical cable manufacturing apparatus comprising:

• a first facing surface and a second facing surface facing each other in a first direction;
• a pressing member and a vibrating member facing each other in a second direction orthogonal to the first direction;
• a controller configured to acquire a first distance corresponding to outer diameters of a plurality of core wires to be joined;
• and
• a driving mechanism configured to vary an interval between the first facing surface and the second facing surface in the first direction, wherein
• the first distance is larger than a maximum value between values of the outer diameters of the core wires and smaller than a sum of the maximum value and a minimum value between the values of the outer diameters of the core wires,
• the electrical cable manufacturing apparatus is configured to
• receive the core wires in a gap between the first facing surface and the second facing surface with the interval set at the first distance, and
• join the core wires by ultrasonic vibration applied to the core wires by the vibrating member while sandwiching the core wires between the pressing member and the vibrating member.