BALLAST CHANGER

PURPOSE:To efficiently catch deteriorated ballast by providing a cylindrical cover around a pipe rotatable and capable of jetting air jet from a nozzle part at the tip, and providing eccentric mass at the upper part of the pipe. CONSTITUTION:Compressed air is led into vibrating rods 6 through compressed air hoses 8, and air jet is jetted from nozzles 9. When a driving motor 17 is driven, the vibrating rods 6 are rotated through gear mechanism, and eccentric mass is also rotated, so that the vibrating rods 6 are deformed in the direction of centrifugal force and put in precession motion. When the vibrating rods 6 penetrates into ballast 59 from the upper part of a railroad track bed 62, the ballast is vibrated to release engagement, and penetration resistance is reduced. The deteriorated ballast is pulverized by the air jet from the nozzles 9 and blown off. The blown-off fine grain ballast is caught into dust covers 12 and suction-conveyed by suction hoses 13.