| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a next-generation stadium capable of eliminating such unpleasantness that a game is suspended due to rainy weather or abrupt rainfall and the clothes of spectators are wetted. <P>SOLUTION: The overall area of a ball game field is divided into eight parts. One surface of a sheet is supported by two iron columns 6 with a tilt angle. A hook is hooked to a winch 5 installed at the top of a steel circular column vertically installed on the inner peripheral surface of the ball game field connecting the vertical line of the triangle and a hook ring 1 at the end of each of two poles drawing the triangle. A joint pin 7 is driven in the upper end of the second pole and the lower end of the third pole and rotated. The third and subsequent poles are pulled down in rainfall, and raised in fine weather by automatic control. A photovoltaic power generator and a circularly rotating vane wind power generator 8 are installed to accumulate the power sufficient for night illumination. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
