| 摘要 |
PURPOSE:To dispense with a steering motor, by providing a truck body with casters and a turntable which is equipped with two drive wheels, and by providing a means for unlocking the turntable at the time of changing the direction of movement of the truck body, and a means for fixing the truck body on the surface of a track. CONSTITUTION:Legs 12a-12d and outriggers 13a-13d are protruded from the four corners of the inside of the body 10 of a truck. Casters 14a-14d are attached to the lower ends of the legs 12a-12d. A projection 15 and a table support 16 are provided on the inside of the upper portion of the truck body 10. A disklike turntable 11 is provided under the projection 15 and the table support 16 so that the table can be optionally rotated around a shaft 17 supported by a bearing 18. Drive wheels 21, 22, which are driven by motors 19, 20, are attached to the bottom of the turntable 11. To change the moving direction of the truck, the outriggers 13a-13d are elongated to lift the truck body 10 to pull the projection 15 out of a recess 231 to unlock the turntable 11 so that only the turntable is rotated by a desired angle. After that, the vehicle body 10 is moved down, and locked by the projection 15. |
