| 摘要 |
PROBLEM TO BE SOLVED: To provide an ejection nozzle capable of instantaneously blocking backflow of muddy water upon suspending the ejection of high-pressure water and smoothly ejecting high-pressure water upon resuming its ejection. SOLUTION: The ejection nozzle for ejecting high-pressure water connected to a supply passage 30 for supplying the nozzle with high-pressure water is constituted of a nozzle main body 2 comprising a connection port 14 disposed on one end to be connected to the supply passage 30 and a guide passage 4 through which high-pressure water is guided, an on/off valve 6 that opens and closes the guide passage 4 by moving forward and backward in the axial direction of the guide passage 4, a guide member 12 inserted in the guide passage 4 which guide member 12 is equipped with a guide part 8 for guiding the forward and backward movement of the on/off valve 6 and has a plurality of cutouts 10 formed along the axial direction of its side wall for allowing high-pressure water to be guided therethrough, an urging means 15 housed in the guide part 8 that urges the on/off valve 6 to move in the axial direction of the guide passage 4, and a nozzle tip 16 connected to the other end of the nozzle main body 2. COPYRIGHT: (C)2007,JPO&INPIT
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