| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a simple gate device usable without using electric power or a battery. Ž<P>SOLUTION: The simple gate device comprises an opening/closing device 1 of a gate bar and a power generating pump 2. A piston cylinder 10 in the power generating pump device 2 is returned to the original state by a spring 11. An opening/closing driving cylinder 19 in the opening/closing device 1 of the gate bar is connected by piping hoses 12, 12'. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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