| 摘要 |
A cleaning water jetting device (40) formed so as to rotate a nozzle by a fluid pressure and capable of reducing the size of the drive part of a pump for feeding fluid to a chamber and an operation cost, comprising an upper side through-hole (6A) recessedly formed in edge shape provided in the ceiling of the chamber (2) and a bottomed concave part (43) formed in round hole shape provide in the bottom surface thereof, wherein the nozzle (4) is installed by inserting a reduced diameter part (7) on a nozzle tip side at the nozzle tip side into the upper side though-hole (6A) and the bottom portion (44) into the concave part (43), and kept in such a state in the upper side through-hole (6A) as to face a cleaning fluid jetting port (5) toward the outside of the through-hole, to be rotated, and to allow the position thereof to be changed in a nozzle axis (O) direction, and can be revolved around the center axis thereof in the titled attitude relative to the center axis (P) of the upper side through-hole (6A). <IMAGE>
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