| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a flash board structure, excellent in water pressure resistance, and also simple in fitting work to a sidewall of a water channel.SOLUTION: The flash board structure comprises a pair of first flash boards 2 fitted to both sidewalls W of the water channel and a pair of second flash boards 3 of a plan view substantially L shape for rotatably connecting mutual respective one ends around a shaft in the vertical direction, respectively rotatably connecting the respective other ends around the shaft in the vertical direction to the pair of first flash boards 2 and installed so that the corner outer edge 4 is positioned on the upstream side of the water chanel, as a flash board 1 for cutting off water of the water channel. Both sidewalls W of the water channel are formed with a plan view rectangular vertical groove part 12 having an upstream side groove surface 10 and a downstream side groove surface 11, and an interval adjusting member 13 for adjusting an interval of both is provided between the downstream side groove surface 11 and the first flash boards 2, and the first flash boards 2 are fixed so as to be pressed to the upstream side groove surface 10 by the interval adjusting member 13.</p> |
