| 摘要 |
PURPOSE: To provide a self-cleaning sprinkler although dust entering a turning and sliding part and a coil spring part of a sprinkler has won and damaged its parts by anew adding a washing nozzle to remove dust in a principal part by itself and also concentrating a sprinkler jet on fallen mineral or the like deposited on the floor surface. CONSTITUTION: A pipe 3a on the side of a sprinkler 4a of a sprinkler is provided with a washing nozzle 11 for spraying pressure water to a spring 9, a body sliding part 6, a blade sliding part 7 and the like. A tip part 11a of the washing nozzle 11 is rotated to make the spraying direction variable. When a valve stem c of the sprinklder nozzle 4a is rotated, a tilt angleθis changed.
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