| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that it takes time for attaching and detaching a cover of a conventional coffin which is structured to attach the cover at the opening part of the upper surface of a coffin body. SOLUTION: A cover can be opened and closed by being attached at the opening part of the upper surface of a coffin body with threefold special hinges. Since it is attached with the threefold special hinges, the cover is enfolded to be strong when it is closed, thereby the cover is strong against shocks when this coffin is moved in a small room.
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