To eliminate such a problem as amplification of the swinging motion of a vehicle body during its run in the case of a segment transporting unmanned vehicle used during tunnel excavation when the segment transporting unmanned vehicle has the ground contact angle of its wheel not perpendicular to the road surface, that is, a curved floor road surface.
A wheel 4 is made possible to be adjusted to its optimum angle by means of a wheel angle controller 11 for controlling a wheel angle and a wheel angle adjusting hydraulic cylinder 12 for swinging a wheel shaft 5 in response to the radius of curvature of a curved floor road surface of a tunnel in roder to adjust the wheel 14 so that the ground contact angle of the wheel may become perpendicular to the curved floor road surface, or on response to the radius of curvature of the curved floor road surface of the tunnel, the wheel 4 is made adjustable to the optimum angle by means of a wheel angle controller to have the wheel angle controlled and a wheel angle adjusting motor for giving turning motion to the wheel shaft.
SHIBATA MANABU
MIKI TOSHIO
SHINKO ELECTRIC CO LTD