Abstract: A sprinkler head accessory includes an inner ring attached to a sprinkler head and an outer ring hiding the edge of a ceiling hole through which the sprinkler head passes. The inner ring has a partition portion facing the outer ring with a gap therebetween. A ventilation portion constituted by the gap through which the indoor side of a ceiling board and the back side of the ceiling board communicate with one another is provided between the outer ring and the partition portion.

Abstract: A sprinkler head includes a main body having, thereinside, a nozzle connected to a water supply pipe, a deflector having a disk shape with a plurality of slits in an edge portion, where the deflector is disposed so as to intersect with a central axis of the nozzle, and a support member configured to connect the main body to the deflector. A circular arc shaped first convex portion is formed in a direction from the center of the deflector to a position obtained by rotating the position of the support member by 90 degrees around the center, circular arc shaped first slits are disposed on either side of the convex portion, and the shape of a portion from one of the first slits to the other via the first convex portion is corrugated.

Abstract: A sprinkler head includes a main body having a nozzle connected to a water supply pipe, the nozzle is provided inside of the main body, a pair of arms extending from the main body in a water discharge direction of the nozzle, where a tip of each of the arms is connected to a boss that has a columnar shape, that is disposed on a central axis A of the nozzle, and that has a female screw thereinside, an impress screw screwed into the female screw and having a tip protruding toward the nozzle, and a deflector having a disc shape and mounted at a front end of the boss. The deflector has a plurality of slits having an equal length cut around a peripheral edge of the deflector at equal intervals, from an outer periphery of the deflector toward the central axis of the nozzle.

Abstract: A sprinkler head includes a body having a nozzle to be connected to a water supply pipe, the nozzle being provided inside the body; a valve that closes the nozzle in normal times; a pair of frames extending from the body in a direction of water discharge from the nozzle; a deflector provided at a distal end of a part where distal ends of the frames are coupled to each other on a center axis A of the nozzle; and a heat sensitive disassembling unit provided between the valve and the deflector. A spring that is bent in a W shape has two ends engaged with the pair of frames, and the heat sensitive disassembling unit is fitted in a bent portion provided between the two ends and of the spring.

Abstract: To provide a protector for a heat-sensitive element of a sprinkler head, the protector being configured to be removably attached to a sprinkler head to protect a heat-sensitive element of the sprinkler head and being configured to be easily removed after completion of installation of the sprinkler head. A protector is to be attached to a sprinkler head including: a main body including a nozzle; frame arms extending from the main body in a water discharge direction of the nozzle; and a heat-sensitive element disposed between the frame arms. The protector includes: an opening through which the heat-sensitive element is insertable into the protector; a base opposite to the opening; lateral faces extending from the base toward the opening and lying adjacent to the frame arms; a flat face provided on an inner side of the base and of the lateral faces; and projections provided on the lateral faces.

Abstract: A sprinkler head accessory includes an inner ring attached to a sprinkler head and an outer ring hiding the edge of a ceiling hole through which the sprinkler head passes. The inner ring has a partition portion facing the outer ring with a gap therebetween. A ventilation portion constituted by the gap through which the indoor side of a ceiling board and the back side of the ceiling board communicate with one another is provided between the outer ring and the partition portion.

Abstract: A sprinkler head includes a main body having, thereinside, a nozzle connected to a water supply pipe, a deflector having a disk shape with a plurality of slits in an edge portion, where the deflector is disposed so as to intersect with a central axis of the nozzle, and a support member configured to connect the main body to the deflector. A circular arc shaped first convex portion is formed in a direction from the center of the deflector to a position obtained by rotating the position of the support member by 90 degrees around the center, circular arc shaped first slits are disposed on either side of the convex portion, and the shape of a portion from one of the first slits to the other via the first convex portion is corrugated.

Abstract: A sprinkler head includes a body having a nozzle connected to a water supply pipe, the nozzle being provided inside the body; a pair of arms extending from the body in a direction of water discharge from the nozzle, the arms having distal ends coupled to a columnar boss provided on a center axis of the nozzle, the boss having an internal thread carved on an inside; an impression screw being in mesh with the internal thread, the impression screw having a tip projecting toward the nozzle; a disc-shaped deflector provided at an end of the boss; and a plurality of slits provided in the deflector and each extending from an outer periphery of the deflector toward the center axis of the nozzle. The deflector further has a tapered slit tapered from a center of the deflector toward the outer periphery. The tapered slit is provided adjacent to a straight slit having a constant width.

Abstract: A sprinkler head includes a body having a nozzle to be connected to a water supply pipe, the nozzle being provided inside the body; a valve that closes the nozzle in normal times; a pair of frames extending from the body in a direction of water discharge from the nozzle; a deflector provided at a distal end of a part where distal ends of the frames are coupled to each other on a center axis A of the nozzle; and a heat sensitive disassembling unit provided between the valve and the deflector. A spring that is bent in a W shape has two ends engaged with the pair of frames, and the heat sensitive disassembling unit is fitted in a bent portion provided between the two ends and of the spring.

Abstract: A sprinkler head includes a main body having a nozzle connected to a water supply pipe, the nozzle is provided inside of the main body, a pair of arms extending from the main body in a water discharge direction of the nozzle, where a tip of each of the arms is connected to a boss that has a columnar shape, that is disposed on a central axis A of the nozzle, and that has a female screw thereinside, an impress screw screwed into the female screw and having a tip protruding toward the nozzle, and a deflector having a disc shape and mounted at a front end of the boss. The deflector has a plurality of slits having an equal length cut around a peripheral edge of the deflector at equal intervals, from an outer periphery of the deflector toward the central axis of the nozzle.

Abstract: To provide a protector for a heat-sensitive element of a sprinkler head, the protector being configured to be removably attached to a sprinkler head to protect a heat-sensitive element of the sprinkler head and being configured to be easily removed after completion of installation of the sprinkler head. A protector is to be attached to a sprinkler head including: a main body including a nozzle; frame arms extending from the main body in a water discharge direction of the nozzle; and a heat-sensitive element disposed between the frame arms. The protector includes: an opening through which the heat-sensitive element is insertable into the protector; a base opposite to the opening; lateral faces extending from the base toward the opening and lying adjacent to the frame arms; a flat face provided on an inner side of the base and of the lateral faces; and projections provided on the lateral faces.

Abstract: A fusible plug employs an alloy which comprises 5-8 mass % of Sn, 31-34 mass % of Bi, 0.2-4 mass % of Sb, and a remainder of In. The alloy melts at approximately 66-70° C. The alloy may further contain at most 2.0 mass % of at least one element selected from strengthening elements consisting of 0.1-1.0 mass % of Cu, 0.1-1.0 mass % of Ge, 0.1-0.7 mass % of Ag, 0.1-0.6 mass % of Au, 0.2-0.6 mass % of Zn, 0.002-0.1 mass % of Ni, and 0.01-0.1 mass % of a lanthanoid.