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    • 3. 发明专利
    • PLASTIC DEFORMATION DETECTOR
    • JP2003207471A
    • 2003-07-25
    • JP2002006648
    • 2002-01-15
    • OHBAYASHI CORP
    • NAKAMURA MITSURUSUGIMOTO KOICHI
    • E04B1/94G01B21/32G01K11/06G01N25/34G08C15/00G08C17/00
    • PROBLEM TO BE SOLVED: To provide a plastic deformation detector by which an inspector is informed of the occurrence of a plastic deformation in a steel skeleton member without removing a fire-resistant coating or the like on the steel skeleton member. SOLUTION: In the plastic deformation analyzer 11, the occurrence of the plastic deformation in the steel skeleton member 9 to which the fire-resistant coating 10 has been executed is detected on the basis of heat generated due to the deformation. The detector is provided with a thermal fuse which is arranged so as to adhere to, or to come close to, the skeleton member so that the generated heat can be transmitted and which has an output end at the outside of the fireresistant coating. The thermal fuse is provided with a molten material 13, at a desired melting point, which is arranged so as to adhere to, or to come close to, the skeleton member so that the generated heat can be transmitted and a plumb hob material 15 which is suspended from the molten material at a temperature less than the melting point by passing the fire- resistant coating on the skeleton member. The occurrence of the plastic deformation is reported by a drop of the plumb hob member as a state change signal. COPYRIGHT: (C)2003,JPO