| 摘要 |
PROBLEM TO BE SOLVED: To enhance safety by concealing a key hole and to prevent foreign matter from intruding into the key hole in such a structure that locking can be easily and quickly released by using a key. SOLUTION: In this entrance door, a door 2 is openably connected to a door frame 1 secured to a building. The door frame 1 comprises a sleeve part 4 having a predetermined width. An interphone 5 is secured to the sleeve part 4. An opening/closing cover 6 is installed on the outdoor side of the interphone 5 to cover the interphone 5. A cylinder case 8 of a lock mechanism 7 for locking the opening/closing of the door 2 is secured to the sleeve part 4 at the upper part, lower part, or side part of the interphone 5. The key hole 9 of the cylinder case 8 is disposed on the outdoor side of the sleeve part 4 and on the inside of the opening/closing cover 6. The opening/closing cover 6 comprises a voice permeable opening 6A through which the voice of the interphone 5 passes while concealing the key hole 9. In the entrance door, the opening/closing cover 6 is opened, and the key 10 is attached/detached to/from the key hole 9, and the cover is closed, and the interphone 5 is used. COPYRIGHT: (C)2009,JPO&INPIT
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