Oil application device

An oil application device that selectively applies oil to a first lateral surface and a second lateral surface of a flat wire, the flat wire including a lower surface, an upper surface that is an opposite surface of the lower surface, the first lateral surface extending from the lower surface to the upper surface, and the second lateral surface that is an opposite surface of the first lateral surface and extends from the lower surface to the upper surface, the oil application device comprising:

• an oil supply member including a first side surface and a second side surface facing the first lateral surface and the second lateral surface, respectively, the first side surface and the second side surface being separated from each other by a distance larger than a distance between the first lateral surface and the second lateral surface;
• and
• a rotation mechanism configured to rotate the oil supply member,
• wherein at least a part of the first side surface is a first application surface that is in contact with a part of the first lateral surface and that is configured to supply oil to the first lateral surface,
• at least a part of the second side surface is a second application surface that is in contact with a part of the second lateral surface and that is configured to supply oil to the second lateral surface, and
• the rotation mechanism rotates the oil supply member to a direction in which the first application surface comes into contact with the first lateral surface and the second application surface comes into contact with the second lateral surface.