| 摘要 |
<p>PURPOSE:To prevent flexure by fixing a plurality of reinforcing ribs between core holders in the shape of a ladder, holding such a space as it does not the ribs into contact with the rear of a core and, at the same time, fixing the rear of the core and the sides of the reinforcing ribs to each other with core bearing materials. CONSTITUTION:Two core holders 10 are welded and fixed to each other with mounting holders 18 and reinforcing ribs 20 extending between them to form a frame 22 together as a unit. At that time, a space is so held that the reinforcing ribs 20 don't come into contact with the rear 8e of a core body 8. After that, the ends 26a of core bearing materials 26 having L shaped sections on the rear 8e of the core body 8 are so closely fixed that they overlap the wall surfaces 20a of the reinforcing ribs 20. In addition, after the lower ends of the core bearing materials 26 are welded with the rear 8e of the core body 8 to fix, the core bearing materials 26 and the reinforcing ribs 20 are welded to fix.</p> |
