| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sprinkler easy to be installed at a site. <P>SOLUTION: This piping structure of a sprinkler comprises: a first joint 11 provided on a rear side of a ceiling and having an engagement protruding part 1 at the periphery and an insertion hole at a lower opening side and having a male screw 4 previously screwed to a flexible tube; a second joint 12 having an insert cylindrical part inserted into the insertion hole and having a screw hole to which a sprinkler instrument is previously screwed, and having an outer flange at the periphery thereof; a coupling fitting 16 integrally having an axial orthogonal plate 14 with a round hole fitted on from a lower peripheral side of the second joint 12 so as to be locked with the outer flange part and an elastic spring piece 15 erected from the axial orthogonal plate 14 so as to be engaged with the engagement protruding part 1 when connected. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
