Hitachi, Ltd.

Nobu Kamita

Takashi Kobayashi

Fumikazu Itoh

Toshijiro Ohashi

Mitsuo Sato

Yasuhiro Yamaguchi

Noboru Sugimoto

Michinaga Kohno

A method of and an apparatus for winding a wire around a toroidal core wherein one end portion of the wire is fixed in a predetermined position and the other end portion thereof is gripped, while leaving free a predetermined length from the leading end, by a gripping device which is moved to a position suitable for bringing the leading end substantially into alignment with a center opening formed in the toroidal core in the side of one surface thereof. After releasing the wire from the gripping device, the leading end of the wire passing through the opening and extending beyond the other surface of the toroidal core is gripped by a pull-out device which is moved to partially pull the wire out of the opening axially thereof, and the other end portion of the wire is again gripped by the gripping device while releasing the wire from the pull-out device. The gripping device is moved to the position to which it moved previously while tensioning the portion of the wire pulled out of the opening, whereby the wire can be fully pulled out of the opening and wound around the toroidal core.

Apparatus for winding wire around toroidal core

A coil-winding machine is disclosed in which an annular member on which wire is to be wound is inserted into a traveling ring and a shuttle and held in position. A predetermined length of wire is stored in the shuttle. The trialing end of the wire stored in the shuttle is fixed on the annular member. The shuttle is rotated in the direction of storage, while at the same time rotating the traveling ring in the direction of storage by the tension of the wire or a turning effort transmitted from a driving system, thus winding the wire on the annular member in the direction of storage. After forming a crossover wire, the wire is fixed on the annular member. The traveling ring is rotated in the direction opposite to that of storage. At the same time, the shuttle is rotated following the traveling ring with brake applied to the shuttle, or a turning effort in the direction of storage is transmitted to the shuttle through a clutch adapted to slip in response to a torque more than a setting, so that the required tension is applied to the wire, thus winding the wire on the annular member in the direction opposite to that of storage. In this way, the wire is wound in different directions in one process.

Winding machine

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Hitachi, Japan

Nobu Kamita