| 摘要 |
PURPOSE:To automatically supply water, by providing an outer cylindrical body forming a water supply hole below the side wall elastic body, water tank inserted in the outer cylindrical body and providing a nozzle at the lower end and elastic body capable of projecting the water tank upward when water in the tank attains prescribed amount. CONSTITUTION:An outer cylindrical body 2 is buried into a culture soil in a culture vessel 7. Water is charged into a water tank 3 and a cap 4 is inserted into the outer cylindrical body 2 while turning the cap down. A coil spring 6 is compressed and water is allowed to gradually flow from the space between a nozzle 5 and bottom of the outer cylindrical body 2a and impregnated from a water supply hole 26 into the culture soil. When water amount in the water tank 3 is decreased and attains definite load or below, water tank is pushed down and upper end circumference 3c is projected from upper edge of the outer cylindrical body 2 by restoring force of the coil spring 6. |
