"The light is dark underground、Space is also limited，Reversing requires the command of a specialist..." This problem once caused a "headache" to M88 appthe rubber-tired truck driver，Ingeniously solved by a small innovation。

Recent，Led by Feng Xiaocheng, maker instructor of Hanjiawan Coal Company，Designed a trigger-type automatic traffic blocking device，Added to the rear of the underground trackless rubber tire vehicle，The safety blocking effect is very obvious。

The device consists of a trigger rod holder、Mobile car arrester、Composed of spring and hook frame，Smart use of the principle of mechanical triggering of crossbows，After the tail trigger rod contacts a person or object，The movable traffic stop installed at the rear of the carriage falls quickly，Immediately block the vehicle and continue to reverse，Protected the rear safety of the vehicle。After installing the device normally，Will not affect the normal driving of the vehicle。

Device utilizing scrap steel pipes、Spring、Welded from leftover materials such as angle iron，Low M88 loginproduction cost、Easy to carry、High flexibility、Sensitive trigger、Low failure rate and other characteristics，After applying the device，Greatly improves the safety factor of trackless rubber-tyred vehicles，Promotes safe production in mines。

“I used to be very nervous when reversing the car，Since the installation of trigger-type automatic traffic blocking device，Much less worries，I feel more confident。" said Wang Yongyong, driver of the trackless rubber tire truck of the installation team。（Cai Lu）