| 摘要 |
PURPOSE:In a stepping board for preventing a wheel from being sunk in the ground which is adapted to be laid on a soft surface of the ground, to prevent damage of the surface of the ground with a simple structure, by positioning a rotary shaft relative to the wheel so that elastic plate-like vanes radially extending from the rotary shaft may be continuously stepped by the wheel. CONSTITUTION:Elastic plate-like vanes 1 are radially mounted to a rotary shaft 2 in such a manner that the rotary shaft 2 is inclined relative to a wheel 3 and the vanes 1 are rotated in the same as a propeller. In use, end portions of the vanes 1 are stepped by the wheel 3, and are elastically bent as inserted between the wheel 3 and a surface 4 of the ground, thereby preventing the wheel 3 from being sunk in the ground. Thus, it is possible to prevent damage of the surface of the ground with a simple structure. |
