| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve cleaning performance by ensuring the smooth rotation of a rotary nozzle part and by reducing a quantity of the leaked pressure fluid. <P>SOLUTION: A nozzle for cleaning the inside of a pipe 1 is provided with a shaft part 2 having a pivot part 22 forming a flow passage 23 for a pressure fluid, a rotary nozzle part 3 rotatably fitted over the pivot part 22 and having a jetting opening jetting the pressure fluid, and a nozzle head 4. The rotary nozzle part 3 is rotatably held to the bearing part 22 through two bushes 5. A predetermined gap communicating to the flow passage 23 and acting the fluid pressure of the pressure fluid from an inner peripheral surface side is installed in a sliding part between the inner peripheral surface of the bushes 5 and the outer peripheral surface of the pivot part 22, and a sealing member (6) sealing the discharge of the pressure fluid is installed in a sliding part between the outer peripheral surface of the bushes 5 and the inner peripheral surface of the rotary nozzle 3 facing the outer peripheral surface, and a predetermined gap communicating with the flow passage 23 and acting the fluid pressure of the pressure fluid from the outer peripheral surface side of the bushes 5 is installed. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
