JP4819739B2 - Concealed sprinkler head - Google Patents

Description

The present invention relates to a concealed head wet prevention means in which a sprinkler head is concealed and installed inside a ceiling.

Conshielded sprinkler heads have excellent design because the sprinkler head is installed behind the ceiling, usually covered with a cover plate, and only the cover plate can be seen from the room. (For example, refer to Patent Document 1).

The cover plate of the conshielded sprinkler head is activated and dropped by the heat from the fire. When the cover plate falls, the sprinkler head installed behind the ceiling is exposed.

On the other hand, the moisture prevention plate is mainly used for a sprinkler head installed in a place where the indoor space is narrow such as a house (for example, see Patent Document 2). If the installation distance between the sprinkler heads is short and one of the sprinkler heads is activated and water is sprayed, the water sprayed from the sprinkler heads installed nearby will adhere, The operating part of the sprinkler head is cooled by the adhering water, and there is a possibility that the operating time may be delayed as compared with that in which no water is attached.

Japanese Patent Laying-Open No. 2005-279083 JP-A-10-272205

The conshielded sprinkler head is covered with a cover plate, so even if a nearby sprinkler head is activated and sprays water, there is no risk that the inactive sprinkler head will be exposed to water. When there is a sprinkler head in a state in which the cover plate is activated by the above, there is a possibility that the sprinkler head in a state in which the cover plate has been detached is covered with water due to water sprinkling from the sprinkler head that has been activated earlier.

However, if a water-preventing plate is installed on the conshielded sprinkler head, the above-described excellent design is impaired.

In addition, the moisture prevention plates are installed in the direction of the concealed sprinkler heads facing each other, and the installation position and number of the moisture prevention plates may change depending on the indoor layout, so the installation direction is flexible. The mounting method must be compatible.

Therefore, in the present invention, in view of the above problems, in the conshielded sprinkler head, the adjacent sprinkler head is not wetted, and the design characteristic of the conshielded sprinkler head is not impaired. The purpose is to provide a preventive measure.

In order to achieve the above object, the invention according to claim 1 is a sprinkler head having a cover plate that is dropped by the heat of a fire, and the sprinkler head is installed behind the ceiling and concealed from the indoor side by the cover plate. In the conshielded sprinkler head, the retainer interposed between the sprinkler head and the cover plate is detachably provided with a wet prevention means that prevents the adjacent sprinkler head from being wetted. It is.

According to a second aspect of the present invention, in the moisture prevention means of the conshielded sprinkler head, the moisture prevention means is always accommodated in the cover plate and is suspended when the cover plate falls. Item 5. A concealed sprinkler head according to Item 1, wherein the concealed sprinkler head is prevented from getting wet.

The invention described in claim 3
2. The concealed sprinkler head according to claim 1, wherein the concealed sprinkler head is provided with a water preventive plate sandwiched by a flange surface of a retainer having a flange surface at a lower end. Means.

According to a fourth aspect of the present invention, in the water-preventing means for the conshielded sprinkler head, the water-preventing plate is housed inside the cover plate so as to be rotatable by a hinge, and when the cover plate falls, The concealed sprinkler head water-preventing means according to claim 1, wherein the water shielding portion of the prevention plate is suspended.

According to a fifth aspect of the present invention, in the water-preventing means for the conshielded sprinkler head, the water-preventing plate is a resilient body installed between the flange surface of the retainer having a flange surface at the lower end and the cover plate. A concealed type sprinkler head according to claim 1 for preventing water.

According to a sixth aspect of the present invention, in the concealed sprinkler head, the confined sprinkler head has a vent hole formed in the confined sprinkler head. It is.

According to a seventh aspect of the present invention, the concealed sprinkler head includes a drop prevention means for preventing the drop due to the momentum of the water when the sprinkler head is actuated and the water is scattered. A concealed type sprinkler head according to claim 1 for preventing water.

According to an eighth aspect of the present invention, there is provided a marker capable of confirming an installation position of the wet prevention plate accommodated in the cover plate in the wet prevention means of the conshielded sprinkler head. This is a means for preventing water exposure of the conshielded sprinkler head.

According to the first aspect of the present invention, the moisture prevention means of the present invention is installed in the conshielded sprinkler head, and is interposed between the sprinkler head and the cover plate, and between the cover plate and the ceiling surface. Even if the cover plate is dropped in the event of a fire, the water retaining plate installed on the retainer can perform its function without dropping even if the cover plate falls in the event of a fire. .

The moisture prevention means of the present invention is configured to hang down when the cover plate is dropped due to a fire, and to prevent water from splashing in the direction in which the moisture prevention means is installed when the sprinkler head is activated. Moreover, when the sprinkler head installed in the vicinity operates previously, it is also possible to block water by a water-preventing means so that the water sprayed from the sprinkler head is not applied.

In addition, when the indoor layout is changed due to the detachable installation of water retaining means that prevents the neighboring sprinkler heads from getting wet, even if the position of the sprinkler heads installed nearby is changed In addition, it is a water-preventing means whose installation position can be changed accordingly.

According to the second aspect of the present invention, since the moisture prevention means is accommodated inside the cover plate, the moisture prevention plate is not always visible because it is hidden inside the cover plate. It does not impair certain design properties.

According to the third aspect of the present invention, the moisture prevention plate can be installed at an arbitrary position on the circumferential surface of the flange by installing the moisture prevention means sandwiched between the flange surfaces of the retainer.

According to the fourth aspect of the present invention, since the water-preventing means is rotatably installed, it is possible to prevent the water-preventing plate from drooping and the adjacent sprinkler head from getting wet when the cover plate falls.

According to the fifth aspect of the present invention, the means for preventing flooding is a projectile, which facilitates the fall of the cover plate in the event of a fire, and hangs down in a stretched state after the cover plate is dropped. It is possible to prevent neighboring sprinkler heads from getting wet.

According to the sixth aspect of the present invention, the water-preventing means is provided in the state before the sprinkler head exposed by the fall of the cover plate in the event of a fire due to the vent hole being formed in the water-preventing means. It allows the hot air stream flowing from the installed direction to pass and promotes the operation of the sprinkler head.

According to the seventh aspect of the present invention, when the sprinkler head is activated, it is possible to prevent the wet prevention means from dropping off due to the momentum of the sprayed water, and to reliably prevent the neighboring sprinkler head from being wet. Is possible.

According to the eighth aspect of the present invention, it is possible to confirm the installation direction of the moisture prevention means accommodated in the cover plate after the moisture prevention means is installed in the conshielded sprinkler head.

In the present invention, the conshielded sprinkler head has a structure in which a retainer having a sprinkler head installed on the back of the ceiling and a cover plate installed at the lower end is attached to the sprinkler head. Alternatively, the retainer can be installed fixed to the ceiling surface.

The moisture prevention means is detachably provided on the retainer, and is installed in a direction in which a sprinkler head near the outer periphery of the retainer exists. The moisture prevention means is always housed in the cover plate and hidden, so that it hangs down when the cover plate falls, so that when the sprinkler head is activated, it will not splash water in the direction in which the moisture prevention means is installed. It is configured. Moreover, when the sprinkler head installed in the vicinity operates previously, it is also possible to block water by a water-preventing means so that the water sprayed from the sprinkler head is not applied.

The moisture prevention means may be configured such that one piece is fixed to the retainer by a hinge structure and the other piece is rotatable, may be bent into a bellows shape, and is formed by bending a resilient material. By doing so, the action as a bullet can be added. It is also possible to use a shape memory element that can be deformed by a predetermined temperature.

In addition, in a state where the conshielded sprinkler head is installed on the ceiling, it is possible to attach a marker to the water-preventing means in order to make it easy to confirm the direction in which the water-preventing means is installed. Specifically, it is possible to color the water-preventing means, or to form protrusions or arrows that can be seen protruding from the periphery of the cover plate in a state of being installed on the retainer.

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a conshielded sprinkler head in which moisture prevention means is installed, FIG. 2 is an enlarged view of the main part of FIG. 1, FIG. 3 is a perspective view of moisture prevention means, and FIG. (A), (b) is an example of a means for preventing dropout of the water-preventing means, (c) is a water-proofing plate provided with vent holes, and (d) is a water-proofing plate. Is a bellows shape, and (e) shows a state in which the cover plate of (d) is removed.

The wet prevention means of the present invention is installed in the conshielded sprinkler head 1 shown in FIG. The conshielded sprinkler head 1 includes a sprinkler head portion 2, a cover plate 3, and a retainer 4, and the cover plate 3 and the retainer 4 are composed of a leg 4 A and a low melting point alloy S provided below the flange portion 5 of the retainer 4. Are joined by.

The moisture prevention means 6 is installed on the flange portion 5 of the retainer 4 interposed between the sprinkler head portion 2 and the cover plate 3, and includes a sandwiching portion 7 that sandwiches the flange portion 4 and a moisture prevention plate 8. Is done. The clamping part 7 is formed by bending a plate material having elasticity into two. The lower sandwiching portion 7A is notched at an intermediate portion, and a moisture prevention plate 8 is installed in the notched portion 9.

The end portion 7B of the sandwiching portion 7 is inclined toward the outside. The inclination serves as a guide so that the holding portion 7 can be smoothly inserted into the flange portion 5 of the retainer 4.

As described above, the sandwiching part 7 is installed with the collar part 5 of the retainer 4 sandwiched. However, when the sprinkler head part 2 is actuated by a fire to release water, the force of the water flow causes the collar part 5 to There is a possibility that it will come off. In order to prevent detachment, a convex portion 10 may be provided on the inner side of the clamping portion 7 as shown in FIG. 4A, or a cut-and-raised portion 11 may be formed as shown in FIG. 4B.

The wetting prevention plate 8 has a plate shape, and a shaft 8 </ b> A is formed on the upper portion thereof so as to be rotatably installed on the bent portion 7 </ b> C of the holding portion 7. As shown in FIG. 4C, the water-preventing plate 8 can be formed with an opening 12, and a cut and raised portion 13 can be formed near the opening 12.

Or as shown to the same figure (d) and (e), it is also possible to install the moisture prevention board 8B bent in the shape of a bellows. The moisture prevention plate 8B may be extended downward by its own weight when the cover plate 3 is dropped, or may be formed of an elastic material and added with an action to promote the fall of the cover plate 3 as an elastic body. it can. As shown in FIG. 4C, the water-prevention plate 8B can also be provided with an opening 12 and a cut-and-raised portion 13.

Then, the installation procedure of the moisture prevention means of this invention is demonstrated.

In order to install the wet prevention means of the present invention in the direction of the sprinkler head installed nearby in the conshielded sprinkler head installed on the ceiling, the clamping part 7 is inserted into the flange part 5 of the retainer 4 . At that time, the water-preventing plate 8 is installed so that the folding water-preventing plate 8 is accommodated in the cover plate 3 to the vicinity of the sandwiching portion 7.

Next, the operation of the moisture prevention means at the time of fire will be described.

When a fire occurs, the low melting point alloy S joining the cover plate 3 and the retainer 4 melts and the cover plate 3 falls. When the cover plate 3 falls, the water prevention plate 8 accommodated in the cover plate 3 is suspended. If there is a sprinkler head that has been activated earlier and sprays water due to the drooping of the water-prevention plate 8, water splashed from the sprinkler head is applied to the sprinkler head portion 2 from which the cover plate 3 has fallen. Is prevented.

Following the fall of the cover plate 3, the sprinkler head unit 2 is actuated to start watering. The water sprayed from the sprinkler head part 2 is sprayed almost uniformly in all directions, but the water colliding with the water-preventing plate 8 is directed in the direction in which the water trajectory is directed downward and the water-preventing plate 8 is installed. Flying distance is limited. Therefore, it is possible to prevent the water sprinkled from the sprinkler head portion 2 from being applied to neighboring sprinkler heads.

Cross-sectional view of conshielded sprinkler head with water proofing means 1 is an enlarged view of the main part of FIG. Perspective view of water exposure prevention means Another embodiment of FIG.

Explanation of symbols

1 Conshielded sprinkler head
DESCRIPTION OF SYMBOLS 2 Sprinkler head part 3 Cover plate 4 Retainer 5 Gutter part 6 Water | moisture-content prevention means 7 Clamping part 8 Water proof plate 9 Notch part 10 Convex part 11 Cut-and-raised part 12 Opening 13 Cut-and-raised part

Claims (8)

A sprinkler head having a cover plate that falls due to the heat of fire, the sprinkler head being installed behind the ceiling and concealed from the indoor side by the cover plate, between the sprinkler head and the cover plate. A concealed sprinkler head water-preventing means characterized in that a water-preventing means for preventing the adjacent sprinkler head from being wetted by an intervening retainer is detachably installed.
2. The water-proofing means for the conshielded sprinkler head, wherein the water-proofing means is always housed in a cover plate and has a structure that hangs down when the cover plate falls. Concealed Sprinkler Head
2. The conshielded sprinkler head according to claim 1, wherein the wetted prevention plate of the conshielded sprinkler head is installed with the flange surface of a retainer having a flange surface at the lower end. Means for preventing head from getting wet.
In the concealed type sprinkler head water-preventing means, the water-preventing plate is rotatably accommodated inside the cover plate by a hinge, and when the cover plate falls, the water-insulating portion of the water-preventing plate is suspended. The concealed sprinkler head according to claim 1, wherein the concealed sprinkler head is prevented from getting wet.
2. The water-preventing means for the conshielded sprinkler head, wherein the water-preventing plate is an elastic body installed between a flange surface of a retainer having a flange surface at a lower end and a cover plate. Means for preventing wetness of the conshielded sprinkler head as described.
2. The concealed sprinkler head according to claim 1, wherein the concealed sprinkler head is provided with a vent hole in the water preventive plate.
2. The wet prevention means for the conshielded sprinkler head, further comprising a drop prevention means for preventing the drop due to the momentum of water when the sprinkler head is actuated and water is scattered. Means for preventing wetness of the conshielded sprinkler head as described.
3. The conshield according to claim 2, wherein the water shield means of the conshield sprinkler head is provided with a marker capable of confirming the installation position of the water shield plate accommodated in the cover plate. Means for preventing moisture from the sprinkler head.

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