Guard rail device

A height adjustable guard rail device for attachment to each side of a large wheel diameter vehicle to prevent an object colliding into the side of the vehicle from falling under the rear wheels thereof comprised of:

• a. a horizontal guard rail extending from about the rear of the front wheels to about the front of the rear wheels of the vehicle and extending substantially within the plane of the rear and front wheels of the vehicle, said guard rail positioned at such a height that as the vehicle travels across a road surface the guard rail does not touch the road surface:
• b. a plurality of upper vertical braces attached to the underside of the vehicle and attached to a plurality of lower vertical braces, the lower vertical braces being attached to the horizontal guard rail;
• c. a plurality of upper diagonal braces attached to the underside of the vehicle and attached to a plurality of lower diagonal braces, the lower diagonal braces being attached to the horizontal guard rail;
• d. wherein the upper and lower diagonal and vertical braces are slidably mounted to each other allowing for the guard rail to be secured in raised or lowered positions;
• and
• e. the upper diagonal brace is rotatably mounted to the underside of the vehicle and the lower diagonal brace is rotatably mounted to the guard rail.