INTERLOCKING DEVICE AND ALARM DEVICE FOR TANK LORRY

摘要

PROBLEM TO BE SOLVED: To provide an interlocking device and an alarm device for a tank lorry wherein first a danger or accident which the tank lorry will move on loading and unloading is prevented, secondly a malfunction that brakes suddenly work on a run is avoided, thirdly these are put into practice at low cost without any deleterious effect on a braking performance. SOLUTION: An interlocking device 17 possesses a blocking material 19 displacing at a blocking position A and evacuating position of inlet and outlet ports 11, a locking means 20 locking a blocking material 19 at the blocking position A. and braking detection means 21 detecting turning on-action of a parking brake. The blocking material 19 is unlocked by the locking means 20 on condition the parking brakes work on. The alarm device 18 sounds alarm unless turning on action of the parking brake 28 is detected with the braking detection means 44 or the blocking position A of the blocking material 19 is detected with the blocking detection means 45.