INSULATING IRON WHEEL PROTRUDING MECHANISM FOR ON-TRACK WORK VEHICLE

PROBLEM TO BE SOLVED: To provide an insulating iron wheel protruding mechanism for an on-track work vehicle having an iron wheel formed integrally from iron and steel to be excellent in durability and reliability. SOLUTION: As an insulating member, in a pivotal connection part of a support frame 13 and an iron wheel holding frame 12, a spacer 24 in the center, a bush 23 in the outside thereof further a bush 22 with flange in the outside thereof are arranged, and in a pivotal connection part of a tip end part of a lift cylinder 11 and the iron wheel holding frame 12, a bush with flange 27 and a bush 28 are arranged. When the lift cylinder 11 is extension/contraction operated, the iron wheel holding frame 12 is swiveled with a frame pivotal support pin 21 serving as the support point, an iron wheel 16, formed integrally from iron and steel, is protruded onto a rail without short-circuiting the right/ left rails.