| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve both height adjustment of a lighting device adapted to a growth stage of plants and height adjustment of a cultivation bed in consideration of workability, with a simple structure.SOLUTION: According to the present invention, a distance between a lighting device 40 and a cultivation bed 50 (bed to lighting device distance c1, c2, c3) on each stage can be adjusted adaptively to growth of plants by vertically moving each of support frames 21 to 23. Specifically, despite a configuration in which not only a height of the lighting device 40 but also a height of the cultivation bed 50 can be changed, the distance between the bed and the lighting device can be appropriately adjusted on all stages by a single operation even if the height is adjusted to any level. Because the height of the cultivation bed 50 can be adjusted by vertically moving each of the support frames 21 to 23, each cultivation bed 50 can be also adjusted to an easily workable height responding to a work requirement.</p> |
