| 摘要 |
PROBLEM TO BE SOLVED: To extract magnetic force more efficiently and apply it strongly to an attracted object in a crusher with a magnet device mounted on a work carriage. SOLUTION: A plurality of permanent magnet pieces are arranged at proper intervals on a magnet main body toward an attraction face. The attraction face of a main body frame transmitting magnetic lines of force is formed with a cover plate fitted to a frame opening section, the cover body is a nonmagnetic plate material, and magnetic plate materials having the shapes nearly matching with the end faces of individual magnetic poles are arranged at the notch sections of the cover plate.
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