THEFT PREVENTION SYSTEM, THEFT PREVENTION DEVICE, MANAGEMENT SERVER, ON/OFF SWITCHING METHOD OF THEFT PREVENTIVE FUNCTION, AND THEFT PREVENTION METHOD FOR INDUSTRIAL MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a theft prevention system for construction machine capable of switching the theft preventive function of a theft prevention device to ON state even in OFF state of the theft preventive function in such a case that the location of the vehicle body of a construction machine is not known by theft thereof or the like.

SOLUTION: A switching instruction of theft preventive function transmitted from a cellular phone 7 by mail is received by the management server 5, and a switching instruction signal is transmitted from the management server 5 to theft prevention devices provided in construction machines 100a, 100b and 100c through a radio communication station 8. The theft prevention devices switch, on receipt of the switching instruction signal, the setting state of the respective theft preventive functions from ON to OFF or from OFF to ON.

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