| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration of shield performance due to an opening, such as door, located in a magnetic shield device. SOLUTION: A fitting frame 11 is located around an opening in which a door frame 21 of door of the magnetic device contained, and is composed of directional magnetic steel sheets having a laminated surface parallel to the opening surface of the opening (a). A magnetic flux, which flows into the fitting frame 11 around the wall of magnetic steel sheet of the shield device, easily flows from its side sheet 111 to the fitting frame 11 and is trapped, and flows through an upper sheet 112 (and lower sheet). Consequently, a leaked magnetic flux reduces. COPYRIGHT: (C)2008,JPO&INPIT
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