| 摘要 |
PURPOSE:To move the truck at will within a narrow place, by guiding the truck on a guide rail with guide rollers atached to wheel frames which are supported on the truck rotatably around vertical support shafts and by shifting the moving direction with a turntable. CONSTITUTION:Each wheel unit 3 attached to a bed 2 has wheels 5 rotatably supported on the wheel frame 4 and has guide rollers 6 which rotate around axes perpendicular to the wheels. The guide rollers 6 are installed at the front side and rear side of the wheel 5. Since the wheel frame 4 is rotatably supported as a caster in a position deviated from the axis of the wheel 5, the direction of the wheel frame 4 can be easily shifted. The moving direction of the truck can be changed without altering the direction of the bed 2. To heighten the safety, the single guide raid 10 is laid on the floor. The turntable 11 is provided to shift the direction of the wheel unit 3 from one rail to another. |
