INTRA-PIT WATER LEAKAGE SENSING DEVICE AND INTRA-PIT WATER LEAKAGE SENSING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent a water leakage sensor installed in an elevator pit from making malfunction caused by a small animal, for example, insects etc.;SOLUTION: On the internal floor surface 7 of the pit 6 positioned at the bottom of the shaft of an elevator, a holder 8 is installed with its holding part 10 confronting. The water leakage sensor is held on the undersurface of the holding part 10. A sensing part 13 exists on the undersurface of the water leakage sensor 11 and is held without contact with the floor surface 7. The water leakage sensor and the holder 8 are covered with an enclosure 17 such as a net having a passing part which does not admit passage of a small animal.;COPYRIGHT: (C)2007,JPO&INPIT