Abstract: A sprinkler head 1 includes a head body 10 having a water discharging cylinder 16 in the interior thereof, a frame 20 connected to the head body 10, a valve body 30 provided in the interior of the frame 20 and closing a water discharging port 12 of the water discharging cylinder 16, a thermosensitive portion 51 configured to support the valve body 30, and a disk spring 64 provided between the valve body 30 and the thermosensitive portion 51. A set screw 65 to be coupled to the thermosensitive portion 51 is provided under the valve body 30, and the set screw 65 is inserted into a through hole 64a at the center of the disk spring 64. The set screw 65 includes a head portion and a leg portion, and the head portion is formed to be higher than the height of the disk spring 64.

Abstract: A sprinkler head configured to prevent breakage of a disk spring due to application of an excessive load and hold the disk spring stably at a predetermined position is provided. A sprinkler head 1 includes a head body 10 having a water discharging cylinder 16 in the interior thereof, a frame 20 connected to the head body 10, a valve body 30 provided in the interior of the frame 20 and closing a water discharging port 12 of the water discharging cylinder 16, a thermosensitive portion 51 configured to support the valve body 30, and a disk spring 64 provided between the valve body 30 and the thermosensitive portion 51. A set screw 65 to be coupled to the thermosensitive portion 51 is provided under the valve body 30, and the set screw 65 is inserted into a through hole 64a at the center of the disk spring 64. The set screw 65 includes a head portion and a leg portion, and the height of the head portion is formed to be higher than the height of the arranged disk spring 64.

Abstract: A sprinkler head having a strong impact structure (impact resistance structure) is provided. A head body 10 having a water discharging port 12, a valve body 30 to be brought into press contact with a valve seat 17 formed at a lower end of the water discharging port 12, and a valve body supporting mechanism 50 configured to support the valve body 30 are provided. The valve body supporting mechanism 50 includes a cylindrical plunger 52 having a flange portion 52a at a lower portion thereof, a thermosensitive member 55 provided at the flange portion 52a of the plunger 52, and a thermosensitive plate 53 coming into contact with the thermosensitive member 55 and provided so as to be orthogonal to an axial center of the head body 10. The plunger 52 is provided so that a lower end portion thereof projects downward with respect to the thermosensitive plate 53.