| 摘要 |
A truck is described having wheels (4) that are fixed to the front part of a bed (1) with arms (3) interposed therebetween so freely as to move up and down and designed to roll backwards and forwards in the longitudinal direction when in contact with the ground, wheels (5) that are fixed to the arms (3) with bearing arms (30) interposed therebetween so freely as to move up and down and designed to roll right and left in the lateral direction when in contact with the ground, and a rear wheel that is fixed to the bed (1) with a hydraulic pressure cylinder interposed therebetween and capable of changing its direction by the turning of a pumping handle which works the cylinder. An arm (40) of which one end is rotatably joined to the bed (1) with a fulcrum link (42) interposed therebetween is provided to the inside of the bed (1) and joined to one end of a swiveling arm (45), of which the other end is rotatably joined to one of the arms (3) so that the wheels (4) can be raised up from the ground by the movement of the arm (40) in association with the rising movement of the bearing arms (30) coupled with the movement of the arms (3) to lower the wheels (5) back down onto the ground. <IMAGE> |
