| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and low cost gate door with a burglar device having a hook-and-eye-hinge functioning as an intrusion sensor and a door opening sensor as well as a load sensor. SOLUTION: In a gate door provided with a hinge metal 2 attached to a door body A and the hook-and-eye-hinge 1 fixed to a gate post B and rotatably supporting the hinge metal 2, In at least one of the hook-and-eye-hinges 1, a trigger 3 that penetrates in the periphery of the bottom face 111 of the hinge metal support 11 and connected to a load sensor 5 is elastically projected, in the hinge metal 2, a recess 4 loosely fitted to the trigger 3 is cut at the lower end periphery of an insert part 21. Usually, the trigger 3 is loosely fitted to the recess 4. When a load larger than a specified value acts on the door body A, the trigger 3 detects the intrusion and the gate rotates, the trigger 3 goes out of loose fitting and the lower end face of the insert part 21 of the hinge metal 2 slides, the opening of the gate door is detected by pressing the trigger 3. The hook-and-eye-hinge 1 provided with such an intrusion detection function and an opening door detection function is arranged. COPYRIGHT: (C)2005,JPO&NCIPI
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