| 摘要 |
PROBLEM TO BE SOLVED: To surely give an alarm to a field worker by providing a unit on a transmission side transmitting an alarm signal and a unit on a reception side actuates a rotating lamp and an alarm sound on receiving the alarm signal. SOLUTION: When a dangerous vehicle whose driver does not notices a working zone for road construction because of the driver's locking at somewhere else, etc., collides with an automatic unit on the transmission side 1, a punching display 10 is crushed and its internal pressure is raised. When this is raised over the set pressure of an amplifier with a comparator 14, a radio equipment on the transmission side 15 transmits the alarm signal. At the time of judging the vehicle to be dangerous from its traveling state, a traffic guide pressurizes the emergency alarming switch 24 of a manual unit on the transmission side 2 to output the alarm signal. At the time of receiving the alarm signal, the unit on the reception side 3 is automatically supplied with power to turn on the rotating lamp 30 to rotate its reflection plate and to raise an alarm by means of an alarm 31. |
