| 摘要 |
PROBLEM TO BE SOLVED: To solve problems wherein the number of atrocious crime is recently increasing, most of the crimes are related to house overwhelmingly, and there is no method for preventing a person who attempts to intrude into a house by pretending to be a home delivery service worker among the crimes, although it is said that water and safety are free of charge in Japan, and to provide an entrance door serving as a small window for crime prevention allowing a resident to receive a visitor and receive mail without opening the entrance door and an emergency escape port in the case of disaster. SOLUTION: The small window 9 for crime prevention for receiving mail sufficiently is provided in an upper step part of the entrance doors 1a, 1b to receive a visitor without opening the entrance door. COPYRIGHT: (C)2004,JPO
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