| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sprinkler which is simply structured, has a small number of components, and is capable of efficiently and equally sprinkling water in a rectangular sprinkling range. <P>SOLUTION: In the sprinkler 1 including a rotational driving mechanism 5 for rotationally driving a jet pipe 3 for jetting water by a prescribed angle each in a circumferential direction by the jetting pressure of water, the sprinkler is provided with a pattern coupler 2 configured by inserting an outer cylinder 22 and an inner cylinder 23 provided with water passing ports 22a and 23a communicable with each other, and the inner cylinder is connected with the jet pipe and rotatably configured. The pattern of the water passing ports is formed so as to control a jet water amount by changing the overlapping of the water passing ports provided on the inner and the outer cylinders by rotating the inner cylinder and changing the effective water passing area of the water passing ports corresponding to the sprinkling angle of the jet pipe. <P>COPYRIGHT: (C)2013,JPO&INPIT |
