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 cylindrical portion forms, at a first holding position, a first airflow path in which a communication portion open to a lower end of the body serves as a first introduction port for the outside air and in which a missing portion lacking a portion of a surrounding wall of the cylindrical portion serves as, by overlapping a slit open to an outer peripheral surface of the body, a first exit through which the outside air flowed in the body is discharged to above the ceiling, and forms, at a second holding position, a second airflow path in which a gap formed between an escutcheon and a heat collector projecting from the lower end of the body serves as a second introduction port for the outside air and in which the missing portion serves as a second exit through which the outside air is discharged to above the ceiling.

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, a valve element, a heat-sensitive disassembling unit, a deflector, at least one strut, and a guide ring. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The deflector has a receiving surface (valve-element supporting portion) and vanes extending from the receiving surface toward the body. The deflector scatters, outward in axis crossing directions of the nozzle, the fire-extinguishing liquid discharged from the nozzle and received by the receiving surface. The least one strut holds the deflector scattering the fire-extinguishing liquid. The guide ring is movable along the at least one strut and between a tip (main-body-side end portion) of the at least one strut and tips of the vanes.

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: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a cylindrical frame, a set pin between the valve element and the disassembling unit, and a spring member engaged with the pin. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit includes a plunger having an interior circumferential surface. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The frame includes an upper part connected to the body and a lower part engaged with the disassembling unit. The pin includes a leg inserted in the plunger and including an inclined surface and a straight portion closer to the valve element. The straight portion is in contact with and slidable over the circumferential surface. The breakdown action causes the pin to move, with the inclined surface contacting the circumferential surface.

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: In a connection structure for fire extinguishing system piping in which a male piping member is connected to a connection opening portion of a joint by screwing a male thread and a female thread together, the male piping member includes a joint cylinder having a protruding portion that is inserted deeper into the connection opening portion than the female thread. Each male piping member and the connection opening portion includes a step portion. The connection structure further includes an indicator that engages the step portions and in a state in which the male piping member and the connection opening portion are connected together. At least one of the male piping member and the connection opening portion includes an unmountable portion that has an outside diameter different from an inside diameter of the indicator and cannot be engaged by the indicator.

Abstract: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a cylindrical frame, a set pin between the valve element and the disassembling unit, and a spring member engaged with the pin. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit includes a plunger having an interior circumferential surface. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The frame includes an upper part connected to the body and a lower part engaged with the disassembling unit. The pin includes a leg inserted in the plunger and including an inclined surface and a straight portion closer to the valve element. The straight portion is in contact with and slidable over the circumferential surface. The breakdown action causes the pin to move, with the inclined surface contacting the circumferential surface.

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 main body, a valve element, a heat-sensitive disassembling unit, a deflector, at least one strut, and a guide ring. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The deflector has a receiving surface (valve-element supporting portion) and vanes extending from the receiving surface toward the body. The deflector scatters, outward in axis crossing directions of the nozzle, the fire-extinguishing liquid discharged from the nozzle and received by the receiving surface. The least one strut holds the deflector scattering the fire-extinguishing liquid. The guide ring is movable along the at least one strut and between a tip (main-body-side end portion) of the at least one strut and tips of the vanes.