Patent attributes
A sprinkler head A has a main body including a pipe connection portion and a frame portion. In the frame portion, an outer circumferential surface protruding to the outside of the pipe connection portion is provided, and beam-like portions (inward flanges) with which a lever of a thermo-sensitive breakup portion engages and openings obtained by cutting off the outer circumferential surface from the side of the pipe connection portion to the beam-like portion are provided at opposite positions in the outer circumferential surface. Thereby, the weight of the frame portion can be largely reduced. Therefore, the weight of a sprinkler head is reduced, so that the weight load applied to the fire extinguishing system pipes in which a large number of sprinkler heads are installed can be reduced, and the work burden due to the weight load when the sprinkler heads are conveyed and installed in the fire extinguishing system pipes can also be reduced.