Title:
DISPLACEMENT DETECTING DEVICE
Document Type and Number:
Japanese Patent JP3821457
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a displacement detecting device which operates mechanically securely in the case of variation of a crack and displacement of earth and stones and can securely detect them in the form of an electric signal.
SOLUTION: A fuse holder 33 provided at one end part of a main body 30 supports both end parts of a fuse tube 34, an engagement tool 39 is engaged with the part of the protection tube 36 of the fuse holder 33, and the other wire is coupled with the side of the engagement tool 39; and this device detects the displacement of a body to be measured from the fructure of the fuse tube 34 due to displacement in the drawing direction between both wires. The movement of the measured body and the crack become larger, the protection tube 36 exceeds its fructure limit to break, and the fuse 35 is blown out, so that the occurrence of abnormality to a detecting device in a control center, a radio transmission room, etc., is detected through a lead wire 42.
Inventors:
Ken Suganuma
Nobuyoshi Kurosawa
Arakawa Tadashi
Ken Okada
Nobuyoshi Kurosawa
Arakawa Tadashi
Ken Okada
Application Number:
JP32970997A
Publication Date:
September 13, 2006
Filing Date:
November 14, 1997
Export Citation:
Assignee:
Nippon Koei Co., Ltd.
International Classes:
G01B21/00; G01B21/32; G01D5/12; G01D21/00; (IPC1-7): G01B21/32; G01B21/00; G01D5/12; G01D21/00
Domestic Patent References:
| JP64046706U | ||||
| JP4109102A | ||||
| JP10002733A | ||||
| JP8178766A |
Attorney, Agent or Firm:
Toshiaki Furusawa
Kazuo Kano
Kazuo Kano
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