Patent ID: 8375569

Claim:
An apparatus for manufacturing a transformer core with an annular shape formed by laminating magnetic sheet materials, the apparatus comprising: a support means which supports each of a plurality of winding bodies of the magnetic sheet materials; a drawing means which draws each of the magnetic sheet materials from the plurality of supported winding bodies by a predetermined length; a cutting means which cuts the plurality of drawn magnetic sheet materials at predetermined set positions and provides a plurality of magnetic sheet materials each with a different length; a first overlapping means which laminates the plurality of cut magnetic sheet materials and forms a block-shaped laminate; a displacement adjusting means which adjusts a relative displacement amount of the plurality of laminated magnetic sheet materials to a predetermined amount; a second overlapping means which laminates a plurality of adjusted displacement block-shaped laminates by order of length and forms a resultant laminate; an annulation means which forms an annular structure of the resultant laminate as a transformer core in which a longer block-shaped laminate forms an outer annular portion, and a shorter block-shaped laminate forms an inner annular portion and both ends of the respective magnetic sheet materials are abutted or overlapped so that the abutted or the overlapped portions are located at annularly different positions between adjoining layers of the magnetic sheet materials; and a control unit which controls at least the drawing means, the cutting means, the first overlapping means and the displacement adjusting means.