Abstract: There is provided a protecting cap configured to protect a sprinkler, the protecting cap having a bottomed cylindrical shape including a bottom surface and a cylinder, having an inner cylinder with a bottom surface and a head housing portion which is configured to house the sprinkler head body, and an outer cylinder to be fitted in an end portion of the cylindrical member; the outer cylinder circumferentially surrounding an outside of the inner cylinder, a tongue portion extending from the inner cylinder and projecting into an opening provided in an upper portion of the cylindrical member; a fastening tool insertion portion, located between the inner cylinder and the outer cylinder, configured to allow insertion of a fastening tool for mounting the sprinkler on a water supply pipe, and includes a coupling portion configured to connect the inner cylinder and the outer cylinder.

Abstract: 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.

Abstract: A protective cap for a sprinkler head and a sprinkler head provided with the protective cap, in which the protective cap for a sprinkler head has a cylindrical shape that is capable of accommodating a sprinkler head therein, the protective cap having an opening on an upper side thereof and a base provided on a lower side thereof, a base side of the protective cap having a drain hole therein, a seat portion on which a surface of the sprinkler head sits being provided inside the protective cap on the base side, in which the seat portion is disposed on an opening side with respect to the drain hole.

Abstract: The present invention realizes a new actuated valve type water flow detection device that can be applied to a pipe with a relatively large bore diameter. The water flow detection device A includes a coil spring for urging a detection rod in an opening direction of a valve body. Therefore, while detecting water flow by linking a rotation of the detection rod 11 to a rotation of the valve body when the valve body opens or closes by a differential pressure, the detection rod does not apply a closing load to the valve body that is released. Therefore, even when the rotation of the valve body is small because the water flow in the secondary side is small in a conventional actuated valve type water flow detection device, it is possible to increase an opening angle of the valve body.

Abstract: A protective cap for a sprinkler head and a sprinkler head provided with the protective cap, in which the protective cap for a sprinkler head has a cylindrical shape that is capable of accommodating a sprinkler head therein, the protective cap having an opening on an upper side thereof and a base provided on a lower side thereof, a base side of the protective cap having a drain hole therein, a seat portion on which a surface of the sprinkler head sits being provided inside the protective cap on the base side, in which the seat portion is disposed on an opening side with respect to the drain hole.

Abstract: A sprinkler head accessory mounting tool that allows an operator who mounts a sprinkler head accessory on a sprinkler head to reduce a burden such as purchasing and carrying a mounting tool for each shape or size of sprinkler head accessory is provided. In a mounting tool for mounting a sprinkler head accessory on a sprinkler head to cover a hole formed at an installation position of the sprinkler head on a ceiling, a main body includes a plurality of support sections on which the sprinkler head accessory can be put, and a grip rod attachment and detachment section is disposed on an opposite side of support sections. Alternatively, a support section holding member on which the sprinkler head accessory can be put is configured to be detachable from a grip rod attachment and detachment section holding member.

Abstract: There is provided a protecting cap configured to protect a sprinkler head, the protecting cap having a bottomed cylindrical shape including a bottom surface and a cylinder, comprising: a tongue portion projecting into an opening provided in an upper portion of the cylindrical member; an outer peripheral portion to be fitted in an end portion of the cylindrical member, a head housing portion configured to house the sprinkler head body, and a fastening tool insertion portion configured to allow insertion of a fastening tool for mounting the sprinkler on a water supply pipe, wherein the cylinder is formed into a duplicated cylinder having an inner cylinder and an outer cylinder, the outer peripheral portion is defined by the outer cylinder, the head housing portion is formed inside the inner cylinder, and includes a coupling portion configured to connect the inner cylinder and the outer cylinder.

Abstract: In a water flow detection device in which signals are output in response to movement of a detection rod that rotates in conjunction with the opening of a valve body, a pin that supports the detection rod is capable of being provided so as to be constantly parallel to a valve shaft of the valve body, and a water flow is capable of being accurately detected by the rotation of the detection rod while the detection rod contacts the valve body without being inclined, the detection rod rotating in response to opening and closing of the valve body. Accordingly, the water flow detection device includes a retainer and an extended block as holding members that hold the pin of the detection rod such that the pin is parallel to the valve shaft of the valve body, the retainer having a bearing for the pin, and the extended block holding the retainer to fix the retainer to the main body with a bolt.

Abstract: To provide a sprinkler head including: a sprinkler head main body having a nozzle therein, connected to water supply piping, and installed in a ceiling; a cover plate concealing the sprinkler head main body; a retainer disposed so that the cover plate is located below the ceiling surface and capable of releasing the cover plate in the event of fire; and a cylindrical member that is attached to the sprinkler head main body and to which the retainer is detachably connected, and having a structure that can save the trouble of removing and reattaching a protective cap at the time of installation of the sprinkler head. The sprinkler head has such a structure that a protective cap attached to the sprinkler head is fitted to the outer periphery of the sprinkler head main body.

Abstract: There is provided a sprinkler head having a structure in which steps such as removing and reattaching a protecting cap are eliminated at the time of construction of the sprinkler head, where a cylindrical member is installed on an outer portion of a sprinkler head body and the protecting cap is installed between the sprinkler head body and the cylindrical member. A cylindrical member and a sprinkler head body are installed by being engaged so as to be rotatable together, a protecting cap configured to protect the sprinkler head body from an external force is locked to the cylindrical member. The protecting cap is provided with a space in which a tightening tool for connecting a sprinkler head to a water supply pipe is capable of locking to a tightening tool engaging portion.