JP2000107318A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To previously prevent an accident caused by the damage to the thermosensible disassembling part of a spinkler head by providing both with wrench engaging notches and with a stepped part to the frame of the sprinkler head for fitting a protective cover to protect the thermosensible disassembling part weak in impact at the time of execution of work or the like. SOLUTION: The frame of a sprinkler head in which a thermosensible disassembling part is equipped between a pair of arms 4, 4 is provided with a large diametric wrench engaging part 11 and a smaller diametric stepped part continued below thereto so as to be projected toward the outer circumference thereto. A bottomed cylindrical protective cover 13 is fitted to the stepped part, and at the time of execution of the work, the circumference of the thermosensible disassembling part such as a glass bulb 5 is covered with the protective cover 13 so as not to be damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguisher sprinkler head, and more particularly to an improvement in a frame type sprinkler head in which a thermal decomposition section is held by an arm.

[0002]

2. Description of the Related Art FIG. 9 is a half longitudinal sectional view of a conventional example of a frame type sprinkler head.

As shown in the figure, this sprinkler head has a water guide hole 3 on the inside and a screw 2 screwed to a pipe (not shown) on the outside, and a boss 7 at the lower end intersection of a pair of arms 4 and 4 projecting downward. , An impress screw 6 screwed into the boss 7, a glass valve 5 having a lower end held by the inpress screw 6, and a glass valve 5 held at an upper end of the glass valve 5 via a packing 9. Water hole 3
And a deflector 10 for watering attached to the lower end of the frame 1.

The glass bulb 5 is filled with a liquid, and when a fire occurs, the heat inside the glass bulb 5 causes the liquid inside to expand and be destroyed. The valve element 8 held above constitutes a heat-sensitive destruction part.

In the sprinkler head, when a fire occurs, as described above, the glass bulb 5 receives the heat and is destroyed. Therefore, the valve element 8 held by the glass bulb 5 supports the glass bulb 5. Lost and dropped, water hole 3
Is released. As a result, water for fire extinguishing supplied from a pipe (not shown) communicating with the water introduction hole 3 gushes out of the water introduction hole 3, and the deflector 10 located below the water supply hole 3.
The fire is extinguished by splashing around.

Here, heretofore, this type of sprinkler head has been attached to a ceiling after a ceiling plate is attached thereto and installation in the room is completed. The outline of the installation procedure is as follows.

[0007] First, a short pipe with a plug at the tip called a hiring pipe is screwed into a falling pipe laid in the ceiling. Next, the ceiling plate is strongly pressed against the plug from below, the ceiling plate is pierced by the plug, and the ceiling plate is attached as it is. Then, the hiring pipe is removed, a mounting hole slightly larger than the outer diameter of the sprinkler head is drilled with a hole saw attached to a hand drill from below, and the sprinkler head is screwed into the falling pipe through the mounting hole and mounted.

However, in the above-mentioned mounting method, it is necessary to perform the work of attaching and detaching the hiring pipe only for the alignment of the mounting hole, and the work efficiency is poor. It must be done, but this work has to be done with a heavy hand drill from below at a high place, and there is a problem that it requires a lot of labor.

An embedded type sprinkler head has been proposed as an improvement of the above point, which is disclosed in Japanese Utility Model Publication No. 58-16.
No. 906. This is such that a protective cap 13 having a projection 13b is put on the embedded type sprinkler head 22 as shown in FIG.
In this state, the work of attaching the ceiling plate 21 can be performed. That is, when the ceiling plate 21 is pressed from below the embedded sprinkler head 22 installed in this state, a mark is formed at the position where the mounting hole 21a is formed by the projection 13b. The protective cap 13 is detached from the embedded sprinkler head 22 after this operation is completed.

[0010]

The above-mentioned conventional sprinkler head is of the frame type shown in FIG. 9 and is installed in a state where a thermosensitive decomposition section supported by an arm projects from the ceiling to the indoor side. A large diameter deflector for watering is provided underneath, so it has high heat-sensing accuracy and its operation is reliable.However, on the other hand, the ceiling plate is attached to the pipe while it is attached. The work cannot be performed, and in order to install the sprinkler, it is necessary to separately provide a member for piercing the ceiling plate called a hiring pipe, and also take time and effort to attach and detach this member to the pipe. There has been a problem that the number of days required for installation is long and the cost for the installation is high.

Further, since the work shown in FIG. 10 can perform the work of attaching the ceiling plate while being attached to the pipe,
Although there is no problem as described above, the sprinkler head attached by this method is limited to the embedded type. This embedded type sprinkler head has a feature that it does not protrude greatly downward from the ceiling, but has a problem that the protrusion dimension must be strictly adjusted. That is, if the embedded sprinkler head is too far from the lower surface of the ceiling, it is liable to receive an external impact, and the characteristic that the embedded sprinkler head is unlikely to receive the inherent impact cannot be utilized. On the other hand, if it is drawn too much, in the event of a fire, the fire-extinguishing liquid sprayed from the embedded sprinkler head is obstructed by the ceiling, making it impossible to perform normal spraying and significantly impairing the fire-extinguishing ability. There was a problem that would be.

Further, the above-mentioned sprinkler heads are all mounted so as to pass through mounting holes provided in the ceiling plate, but if the positions of the mounting holes are shifted, a gap is formed between the sprinkler head and the sprinkler head, making it unsightly. In order to prevent this, it is necessary to strictly adjust the position when drilling the mounting hole, it is necessary to be careful in work, and it is not possible to perform efficient work There was a problem.

An object of the present invention is to solve the problems of the conventional sprinkler head.

[0014]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention has an arm for holding a thermo-sensitive decomposition section, and a deflector for watering is provided at a lower end. In the frame-type sprinkler head, a large-diameter spanner hook is provided in the middle of the frame of the sprinkler head so as to protrude outward, and below the spanner hook, smaller than the outer diameter of the spanner hook, And a step part with the same diameter or large diameter as the outer diameter of the deflector is provided,
A bottomed cylindrical protective cover for covering the thermal decomposition section is fitted to the step.

According to a second aspect of the present invention, there is provided a frame type sprinkler head having an arm for holding a thermal decomposition part and a deflector for water sprinkling provided at a lower end of the frame. The adapter is provided with a large-sized wrench hooking part on the upper side and smaller than the outer diameter of the spanner hanging part on the lower side, and the same diameter as the outer diameter of the deflector. Alternatively, a large-diameter step portion is provided, and a bottomed cylindrical protective cover that covers the thermal decomposition section is fitted into the step portion.

According to a third aspect of the present invention, in the configuration of the first or second aspect, the spanner hook is provided with a flange for closing a gap between a mounting hole provided in the ceiling plate and the sprinkler head. The annular sealing plate also serves as a fitting portion.

According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, the spanner hook is limited to a substantially circular shape in plan view having a plurality of projections or recesses provided therearound. is there.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. In the drawings, the same functional components as those shown in the conventional example are denoted by the same reference numerals.

FIG. 1 is a side view of a sprinkler head according to the present invention. As shown in the drawing, this sprinkler head has a water guide hole 3 on the inside and a pipe connection screw 2 on the outside, and a pair of arms 4, 4 projecting in a horseshoe shape below, like the conventional frame type sprinkler head. A frame 1, an impress screw 6 screwed into a boss 7 provided at an intersection of the lower ends of the arms 4, 4, a glass valve 5 having a lower end held by the inpress screw 6,
It is constituted by a valve body 8 held at the upper end of the glass valve 5 and closing the water guide hole 3 via a packing 9, and a deflector 10 for watering attached to the lower end of the frame 1. A liquid is sealed inside the glass bulb 5, and when a fire occurs, the liquid expands due to the heat, and the glass bulb 5 is destroyed. And the valve body 8 held above it constitutes a thermal decomposition section.

Here, in the sprinkler head according to the present invention, a middle part of the frame 1 protrudes outward in a flange shape, and a wrench hooking part 11 having a hexagonal outer shape is provided. A step portion 12 which is continuous with the upper end of the arm 4 is provided. This step 12
Is the deflector 1 attached to the lower end of the frame 1.
The dimensions are set to be equal to or slightly larger than the outer diameter of 0.

The sprinkler head is formed by screwing a screw 2 on the outer periphery of the sprinkler head to a falling part (indicated by reference numeral 20 in FIG. 2) of a pipe laid near the ceiling, similarly to the conventional one. The water introduction hole 3 communicates with the inside of the pipe 20 and can be attached. In this manner, interior work such as attaching a ceiling plate is performed while being connected and fixed to the pipe 20. At this time, in the sprinkler head of the present invention, a step provided below the spanner hook 11 is provided. As shown in FIG. 2, a substantially cylindrical protective cover 13 with a bottom is fitted to the portion 12. This protects the thermo-decomposable portion, such as the glass bulb 5, which is vulnerable to impacts, from being damaged even in the event of construction such as ceiling attachment work.

After the work is completed, the protective cover 13 may be pulled down so that the fitting with the step portion 12 is released, whereby the lower portion of the sprinkler head is opened in an operable state. . 2 and 3 on the outer periphery of the spanner hook 11 of the sprinkler head installed through the mounting hole 21a of the ceiling plate 21 in this manner.
As shown in FIG. 5, a flanged annular sealing plate 14 can be fitted. In this case, the gap between the mounting hole 21a provided in the ceiling plate 21 and the sprinkler head is closed invisibly from the outside. The finish appearance of the ceiling is improved.

In FIG. 2, reference numeral 13b denotes a marking projection protruding from the lower surface of the protective cover 13. The projection 13b is positioned upward when the ceiling plate 21 is attached. The pressed ceiling plate 21
Are formed as recesses at the positions where the mounting holes 21a of the sprinkler head are formed. Reference numeral 13 a denotes a locking step provided on the inner periphery near the lower end of the protective cover 13, and abuts on the outer peripheral edge of the deflector 10 to regulate the position of the protective cover 13 near the lower end.

FIG. 4 is a partially cutaway side view showing another embodiment of the present invention. As shown, in this case, an annular adapter 15 is attached to the outside of a normal frame type sprinkler head, and the adapter 15 forms a spanner hook 15a and a step 15b in the middle of the frame 1. . In FIG. 4, reference numeral 16 denotes a screw for fixing the adapter 15 to the outside of the frame 1.

FIGS. 5 and 6 are a semi-longitudinal sectional view and a plan view of a sprinkler head showing still another embodiment of the present invention. In this case, the spanner hooking portion 17 provided in the middle of the frame 1 of the sprinkler head has a substantially circular shape in a plan view having a plurality of projections 17a provided around it. This is the same as that of the embodiment. In this case, the upper end of the protective cover 13 is also recessed so as to be engaged with the projection 17a, so that the holding of the protective cover 13 is further ensured.

As shown in FIGS. 7 and 8, the outer shape of the spanner hook 18 is circular, and a plurality of recesses 1
8a may be provided. In this case, the annular sealing plate 14 can be easily fitted to the spanner hooking portion 18a, and it does not easily fall off. Further, the gap generated between the sprinkler head and the sealing plate 14 can be made inconspicuous.

As described above, the spanner hooks 17, 1
8 is a circular one having a projection 17a and a recess 18a around it, the pipe 20 of the sprinkler head
A dedicated spanner equipped with claws will be used for the connection work to the cable.

In the above embodiment, the glass bulb 5 is used as the thermal decomposition part. However, the thermal decomposition part is decomposed by heat at the time of fire, and the valve body closing the water introduction hole 3 is fired. It is sufficient if the glass valve 8 is open, and it is not always necessary to use the glass bulb 5.

When the sealing plate 14 closes the gap between the frame 1 of the sprinkler head and the mounting hole 21a, the ceiling plate 21 is pierced by the projection 13b provided at the lower end of the protective cover 13 and the ceiling plate 21 is left as it is. 21 may be attached. This is desirable because the labor for finishing the attachment hole 21a using a hand drill or the like can be reduced, and the work efficiency can be further improved.

[0030]

As described above, according to the first aspect of the present invention, the protective cover is attached by providing the spanner hook and the step on the frame of the sprinkler head. It can protect the thermosensitive part that is vulnerable to shocks during construction work, preventing accidents caused by damage to the thermosensitive part and using extra nerves as before for work The efficiency of construction work such as ceiling installation is improved.

According to a second aspect of the present invention, a sprinkler head having the effects of the first aspect of the present invention is provided by providing a spanner hook and a step on an annular adapter fixed to the outside of the frame. The sprinkler head can be easily manufactured at low cost.

According to a third aspect of the present invention, the spanner hook portion includes:
The sprinkler head is installed in addition to the effect of the invention described in claim 1 or 2 by fitting a flanged annular sealing plate that closes a gap between the mounting hole of the ceiling plate and the sprinkler head. This has the effect of improving the appearance of the finished ceiling. Further, even if the position of the mounting hole of the ceiling plate is slightly displaced, the gap is closed by the sealing plate, so that the ceiling mounting work does not require the same precision as before, and the effect that the work efficiency is improved can be obtained. .

According to a fourth aspect of the present invention, a spanner hook is provided.
By adopting a substantially circular shape in a plan view in which a plurality of projections or recesses are provided on the periphery, in addition to the effect of the invention described in claim 3, an effect that the mounting of the sealing plate can be easily and reliably obtained. Can be

[Brief description of the drawings]

FIG. 1 is a half longitudinal sectional view showing an embodiment of a sprinkler head according to the present invention.

FIG. 2 is a longitudinal sectional view of the sprinkler head shown in FIG. 1 in a mounted state.

FIG. 3 is a sectional view taken along line A-A ′ of FIG. 2;

FIG. 4 is a partially cutaway side view showing another embodiment of the sprinkler head according to the present invention.

FIG. 5 is a partially cutaway side view of a sprinkler head showing a modified example of a spanner hook.

FIG. 6 is a top view of the sprinkler head shown in FIG.

FIG. 7 is a partially cutaway side view of a sprinkler head showing another modification of the spanner hook.

FIG. 8 is a top view of the sprinkler head shown in FIG.

FIG. 9 is a half longitudinal sectional view showing a conventional example of a sprinkler head.

FIG. 10 is a sectional view of an installation state according to another conventional example of a sprinkler head.

[Description of Signs] 1 Frame 2 Screw 3 Water guide hole 4 Arm 5 Glass valve 6 Boss 7 Impress screw 8 Valve 9 Packing 10 Deflector 11, 15a, 17, 18 Spanner hook 12, 15b Step 13 Protection cover 13a Lock Step 13b Projection 14 Sealing plate 15 Adapter 16 Screw 17a Projection 18a Recess

Claims (4)

[Claims] 1. A frame type sprinkler head having an arm for holding a thermosensitive decomposition section and having a deflector for water sprinkling provided at a lower end thereof, wherein a large diameter of the sprinkler head projects outward in the middle of the frame of the sprinkler head. And a step portion having a diameter smaller than the outer diameter of the spanner hook portion and equal to or larger than the outer diameter of the deflector is provided below the spanner hook portion. A sprinkler head, wherein a bottomed cylindrical protective cover for covering the portion is fitted. 2. A frame type sprinkler head having an arm for holding a thermosensitive decomposition part and having a deflector for water sprinkling at a lower end, wherein the frame is fitted around the middle of the sprinkler head frame. An annular adapter is attached to the adapter, and the adapter has a large-diameter spanner hook on the upper side, and is smaller than the outer diameter of the spanner hook on the lower side, and has the same diameter or a larger diameter as the outer diameter of the deflector. A sprinkler head provided with a step, wherein a bottomed cylindrical protective cover for covering the thermal decomposition section is fitted to the step. 3. The spanner hooking portion also serves as a fitting portion of a flanged annular sealing plate that closes a gap between a mounting hole provided in a ceiling plate and a sprinkler head. Item 2. The sprinkler head according to Item 2. 4. The sprinkler head according to claim 3, wherein the wrench hooking portion has a substantially circular shape in plan view having a plurality of protrusions or recesses provided around the wrench.