| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw removal detection device which is easily installable on a fixed member and screw fastening means and stably held without removing the existing fixed member and the screw fastening means or performing an additional process thereon, capable of correctly detecting a screw removal state over a long period, and capable of being manufactured at a low cost.SOLUTION: A screw removal detection device S includes a main body member 1, a sensor member 2, a magnetic force adsorption member, a cable 6, a heat storability tube 7 or the like. The sensor member 2 is movable between a projection position and a push-in position, and has a contact 2a urged by a spring on the projection position side, and a changeover switch 2b for performing changeover of a circuit at the projection position and the push-in position of the contact 2a. At initial setting, the contact 2a is made to abut against the screw fastening means in a state in which a fixed member is supported by the screw fastening means, and the main body member 1 is fixed to the fixed member in a state in which the contact 2a is pushed to the push-in position. |
