| 摘要 |
PROBLEM TO BE SOLVED: To provide a gravestone with an attaching and detaching mechanism, in which anti-earthquake measures are also taken. SOLUTION: A first recess part having a depth D<SB>1</SB>is provided in an upper face of a first component. A first hole is formed in a substantially central part of the first recess part to extend downward. A first permanent magnet having a thickness H<SB>1</SB>is fixed inside the first recess part. A second recess part having a depth D<SB>2</SB>is provided in a lower face of another component positioned immediately on the former-mentioned component. A second hole is formed in a substantially central part of the second recess part to extend upward. A second permanent magnet having a thickness H<SB>2</SB>is fixed inside the second recess part. A shaft piercing through the central parts of the first and the second permanent magnets is inserted into the first and the second holes. Each of the first and the second permanent magnets has a north pole and a south pole alternately. By turning the latter-mentioned component around the shaft in a manner that opposite parts of the first and the second permanent magnets have the same polarity, the latter-mentioned component becomes removable. COPYRIGHT: (C)2006,JPO&NCIPI
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