JPH0229972Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sprinkler head connected to sprinkler piping on each floor in an automatic fire extinguishing system, or sprinkler, installed on the ceiling of a high-rise building.

<Prior art> As a recent architectural style, ceilings are lowered as much as possible to increase the efficiency of building volume usage, and in order to effectively utilize indoor space and maintain aesthetic appearance, a flush type sprinkler system with less exposed parts from the ceiling is used. There is a tendency for sprinkler heads to be used, and the structure is such that compressive force is applied to the fusible piece, which is the main part and is eluted by a heat-sensitive plate and operates the valve.It is possible to increase the strength and downsize the heat-sensitive part to make the sprinkler head itself smaller. There is a tendency to measure.

Its conventional structure includes a frame 2 and a main body 1, as described in Japanese Utility Model Publication No. 53-8239 (see Figure 1) and Publication of Utility Model Publication No. 56-49636 (see Figure 2).
The upper end has an outwardly bent supporting part which presses the spring 9 upward by the force generated by the lower end screwing and supports the valve part 4 in pressure contact with the lower end opening of the main body, and the lower end always expands outward. A pair of levers 10 whose upper bending support end surfaces are supported on the inner periphery of the lower end of the frame to which a force is applied; Setting plate 11 that holds the heat sensitive plate 16
and a balancer 12 whose ends are engaged with the engagement holes at the lower end of each lever 10 and which are fitted into the heat sensitive cylinder 13, a heat sensitive piston 14, and the fusible piece 1 held between the cylinder and the piston.
It consists of a heat-sensitive plate 16 surrounding 7, and the heat-sensitive plate 16
The heat due to the rise in indoor temperature is transferred to the heat sensitive cylinder 13.
As a result, the heat conduction is conducted to the fusible piece 17, and the heat susceptor piston 14 presses the fusible piece 17 filled in the heat susceptor cylinder 13, and also moves the heat susceptor cylinder 13 and the balancer 12 fitted into the heat susceptor cylinder 13 downward. to bias. The fusible piece 17 is
Composed of low melting point alloy.

With the above configuration, a rise in ambient temperature due to the occurrence of a fire is sensed by the heat sensitive parts such as the heat sensitive plate 16 and the heat sensitive cylinder 13. That is, when the ambient temperature around the sprinkler head rises, the temperature of the heat sensitive parts such as the heat sensitive body 16 rises, and due to thermal conduction, the fusible piece 17 in the heat sensitive body cylinder 13 melts when the temperature exceeds a predetermined temperature, and the heat sensitive body cylinder 13, The heat sensitive plate 16 and the balancer 12 lose their force balance and are released from the biasing force of the heat sensitive body piston 14, sliding upward, and the engagement between the balancer 12 and the lever 10 is disengaged, and the lower end of the lever 10 is freed and released. The lever 10 deviates from the frame 2 due to the horizontal opening force, and the heat-sensitive part of the setting plate 11 disintegrates and scatters due to the pressure water from above, and the valve part also disintegrates into the main body 1.
Pressure water inside the sprinkler piping is released from the water outlet and sprays around, extinguishing the fire. That is, the balancer 12 includes the fusible piece 1
7 is eluted and the tension between the heat-sensitive piston 14 and the heat-sensitive cylinder 13 is relaxed beyond a certain limit, so that the balancer 12 can move upward in the long hole in the vertical direction provided in the lever 10. 12 is a heat sensitive cylinder 13 and a heat sensitive plate 1
The release is performed by moving the respective parts of the frame 2 upward as a unit with respect to the lower end of the frame 2.

Therefore, in order for the outer end engaging portion of the balancer 12 to disengage from the lever 10, at least a gap of a size corresponding to the engagement depth of both ends of the balancer is essential between the heat sensitive plate 16 and the lower edge of the frame 2. It is.

In this way, in the above configuration, the heat sensitive plate 1
Since there is an essential gap between 6 and frame 2, the structure becomes unstable, and when an external impact is applied, the decomposition part and heat-sensitive part easily deform or loosen, causing the sprinkler head to explode. , there is a risk of causing a water discharge accident. In addition, since the disassembly part is large, the protruding part from the ceiling is also large, and there is a risk of being hit by objects from outside.

Therefore, the Utility Model 57-97565, which improved this drawback,
No. 3 (see FIG. 3), the structure is such that the valve part and the heat-sensitive part are connected by a guide pin 7, and the fusible piece 17 is compressed to make it rigid, but as shown in the figure, Since there is a gap between the frame 2 and the heat-sensitive plate 16, the main parts such as the fusible piece 17 and the lower end of the guide pin 7 are located in the gap, and the heat-sensitive part is deformed by external impact or stimulation. , loosening, etc., resulting in the same drawbacks as in the above two examples.

<Problems to be solved by the invention> The flash type sprinkler head of the invention solves the above-mentioned drawbacks, is resistant to external impact, is more compact, and has a smaller protruding part from the ceiling.
The object of the present invention is to provide a completely new and useful flash type sprinkler head that is difficult to hit by objects from the outside.

<Means for Solving the Problems> The present invention will be described in detail below with reference to illustrated embodiments.

FIG. 4 shows an embodiment of the flash type sprinkler head of the present invention. As shown in the figure, there is a main body 1 connected to sprinkler piping, a valve portion covered by a frame 2 at the tip of the main body 1, and a heat-sensitive plate 16 fixed in contact with the tip of the frame 2.
It consists of a heat-sensitive part that is protected and covered by The main body 1 includes a cylinder 1b having an opening 1a.
, a threaded portion 1c for connection to sprinkler piping provided on the outer wall surface of the cylinder 1b, and a flange portion 1e provided with a threaded portion 1d for screwing and fixing the frame 2. The valve part consists of a gasket 3 and a valve cap 4, supported by a deflector 5 and a deflector ring 6, and is pressed upward by a guide pin 7 and a guide 8 via a spring 9. The spring 9 faces a lateral slit bored in the lower part of the frame 2. The heat sensitive part is
As shown in FIGS. 4 and 5, a pair of levers 1
0, and a setting plate 1 that is engaged and locked in an engaging portion 10b that is a horizontal hole near the top of the lever 10.
1, a balancer 12 that forcibly receives and fixes the rotational torque of the lever tip 10a, a heat sensitive cylinder 13, a heat sensitive piston 14, and a nut 1.
5, and a fusible piece 17 press-sealed within the heat-sensitive cylinder 13. Here, for the engaging portion of the lever 10, various shapes and structures such as an engaging hole and an engaging pawl are possible. Further, a gap is provided between the heat-sensitive body cylinder 13 and the heat-sensitive body piston 14, and serves as an elution port 18 for the fusible piece 17. however,
A portion of the fusible piece 17 also flows out from the gap between the rod hole of the heat sensitive cylinder 13 and the rod of the heat sensitive piston 14. Thick protrusion 10c of lever 10
The spring 9 is pressed, that is, the guide pin 7 is pressed, and the gasket 3 and the valve cap 4 of the valve portion are urged upward.

Further, the tip 7a of the guide pin 7 is pushed into a position closer to the sprinkler pipe than the tip 1f of the opening 1a of the main body 1, so as to urge the valve cap 4 upward. Lever tip 10a
is in the shape of a claw, and the balancer 12 is provided with a claw-like protrusion 12a bent upward for holding the claw of the lever tip 10a and receiving the outward force of the lever 10. The balancer 12 is detachably attached to the tip of the lever 10. The heat-sensitive plate 16 has an opening 16a at the bottom corresponding to the outer diameter of the heat-sensitive cylinder 13, and a flange-shaped projection 13a on the side of the opening of the heat-sensitive cylinder 13.
The opening 16a is fitted into the opening 16a. Further, as shown in FIG. 6, the heat sensitive element 16 has a cutout window 1 on the side surface.
6b, and is fitted to the frame 2 either closely or with a slight gap.

With the above configuration, the flash type sprinkler head of the present invention has a gasket 3 and a valve cap 4 at the tip of the opening 1a of the main body 1 connected to the sprinkler piping in the normal warning state.
The guide pin 7 presses and biases to suppress release of pressurized water. The fusible piece 17 of the heat sensitive part is constantly pressurized by the heat sensitive cylinder 13 and the heat sensitive piston 14, so the heat sensitive part senses heat,
When the fusible piece 17 melts, the fusible piece 17 flows out from the elution port 18, and the heat-sensitive cylinder 13 and the heat-sensitive plate 16 move downward. The balancer 12 is connected to the tip 10a of the lever 10.
As a result, the lever 10 is disengaged from the frame 2 due to the outward rotational torque, and the heat-sensitive part disintegrates and scatters. At this time, the spring 9, guide 8, and guide pin 7 lose their supporting parts and fall downward together with the lever 10.

Next, the gasket 3 and the valve cap 4, which are suspended from the deflector ring 6 by the deflector 5, are attached to the tip of the sprinkler head by the deflector ring 6 falling and fitting onto the inner surface of the inner edge 2a of the tip of the frame 2. It settles on the main body 1, receives the pressurized water released from the opening 1a of the main body 1, and uniformly scatters the water to the surrounding area to extinguish the fire. In addition, even if there is no fire, if the fusible piece 17 causes creep due to compressive force applied to the fusible piece 17, ambient temperature changes, deterioration due to aging, etc., a part of the fusible piece 17 will gradually leak out from the elution port 18. Since it flows out, it is possible to detect when it is time to replace the sprinkler head, that is, the end of its service life.

Furthermore, by providing the cutout window portion 16b on the side surface of the heat-sensitive plate 16, heat can be sensed around the heat-sensitive body cylinder 13, and the sensitivity of the heat-sensitive portion is high, and since both ends of the balancer are bent upward and locked, , there is no need for any gap between the edge of the heat-sensitive plate 16 and the lower end of the frame 2 to release the lower end of the lever 10 from the balancer 12, and the heat-sensitive plate 16 is located inside the tip of the frame 2 except during operation. Edge 2a
It is resistant to external shocks because it is attached closely or close to it with a slight gap.
It has excellent advantages not found in other sprinkler heads, such as its ability to protect heat-sensitive parts.

Next, as shown in FIG. 7, the heat-sensitive piston 14 includes a piston plate 14a having a tapered hole;
By dividing the rod 14b into a rod 14b whose head is a spherical protrusion, manufacturing errors of the heat-sensitive piston 14, nut 15, fusible piece 17, etc. as shown in FIGS. ₁ < L ₂ ), gaps and partial contacts that may cause creep of the fusible piece 17 are removed along the sloped surface or inclined surface of the fusible piece, as shown in Figures 9a and b. This can be prevented by applying close contact and pressure, and this drawback can be eliminated.

A flash sprinkler head may be attached to the sprinkler piping prior to installation of the ceiling panel 22. At this time, a protective cap 19 as shown in FIG. 10 is used. The protective cap 19 is
It has an inverted bell shape and has an annular claw 19a at the opening,
A notch 19b is provided in the peripheral wall of the opening, and is made of a slightly elastic material such as synthetic resin. The protective cap 19 is attached so as not to fall by engaging the annular claw 19a in the upper annular notch groove 2b of the frame 2, and is removed when the sprinkler head is used after the ceiling plate 22 is installed.

Further, in order to cover the gap between the sprinkler head installation hole 23 of the ceiling plate 22 and the outer wall of the frame 2 of the sprinkler head, a trapezoidal disk-shaped sealing plate 20 as shown in FIG. 11 is used. An elastic ring 2 is provided on the inner surface of the sealing plate 20.
1, which is closely fixed to the outer wall of the frame 2 and crimped to the ceiling plate 22 so as to be movable up and down.

As described above, the flush type sprinkler head of the present invention has an extremely narrow gap between the frame and the heat-sensitive plate, so that external shocks and stimulations are difficult to transmit to the inside, and it is strong against external shocks. It has the extremely useful effect of having a small protrusion from the ceiling, and also has the advantages of conventional flush type sprinkler heads, and has many features such as being aesthetically pleasing and offering excellent safety. .

[Brief explanation of drawings]

1, 2, and 3 are longitudinal sectional views of a conventional sprinkler head, FIG. 4 is a longitudinal sectional view of an embodiment of the flash type sprinkler head of the present invention, and FIG. 5 is a longitudinal sectional view of a conventional sprinkler head. FIG. 6 is a partial cross-sectional side view showing the cutout window provided in the heat-sensitive plate, and FIG. 7 is a main part of the split-type heat-sensitive piston. 8a and b are diagrams showing the tightening error between the heat-sensitive piston and the nut, and FIGS. 9a and b are longitudinal sectional views of the section.
A diagram showing the pressed state of the fusible piece in the case of a split type heat-sensitive piston, FIG. 10 is a cutaway sectional view of the main part showing the installation state of the protective cap, and FIG. 11 is a cutaway sectional view of the main part showing the installation state of the sealing plate. figure,
FIG. 12 is a partially exploded perspective view. 1... Body, 2... Frame, 3... Gasket, 4... Valve cap, 5... Deflector, 6... Deflector ring, 7... Guide pin, 8... Guide, 9... Spring, 10... …
Lever, 11...Setting plate, 12...
...Balancer, 12a... Claw-like projection, 13... Heat sensitive cylinder, 14... Heat sensitive piston, 15
... Nuts, 16 ... heat-sensitive plate, 17 ... fusible piece,
18... Elution port, 19... Protective cap, 20...
... Sealing plate, 21 ... Elastic ring, 2
2...Ceiling board.

Claims (1)

[Scope of utility model registration request] A main body connected to a water discharge port at the tip of a sprinkler pipe, a frame screwed down to the main body, a valve part held within the frame and constantly suppressing pressure water in the pipe, and pressurizing the valve part. In a flash type sprinkler head consisting of a support member to be held and a heat-sensitive part that is pressed against the lower surface of the flush type sprinkler head, the upper surface of the sprinkler head is supported by the valve part support member and the upper outer end is locked on the inner edge of the lower end of the frame. The setting plate is horizontally engaged with the locking holes on the pair of levers so as to be able to slide upward, and the lower end of each of the levers has a claw-like projection with both ends bent upward. A fusible piece is loaded into a heat susceptor cylinder which is fitted into the balancer and whose bottom end is open, and the heat susceptor piston penetrates the heat susceptor cylinder and the fusible piece from bottom to top, and the base of the claw-like protrusion is latched. By sealing the fusible piece and tightening the heat-sensitive body piston on the upper surface of the setting plate, the heat-sensitive portion is covered, and the upwardly facing outer end surface of the heat-sensitive plate, which is fitted and fixed on the outer periphery of the opening of the cylinder, is attached to the heat-sensitive body of the frame. A sprinkler head characterized in that it is attached in close contact with, or nearly in close contact with, the lower opening edge.