JPH0538758Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to the improvement of the deflector of a so-called flash fire sprinkler head, in which the deflector slides down to a predetermined position and starts sprinkling water during operation.

Conventional technology The conventional flash type sprinkler head is
As shown in the figure, the head body 1 has a water outlet 2 in the center for discharging pressurized water, and a cylindrical frame 4 in the brim 3.
and press the cap 5 onto the water outlet 2.
It has a structure in which a thermal decomposition section for sealing off pressure water and a deflector 7 provided at the lower edge of the guide rod 6 are provided within a cylindrical frame 4. In the thermal decomposition section, when the fusible alloy 10 between the piston 8 and the cylinder 9 melts, the arm 11 rotates about the lower end flange 4a of the cylindrical frame 4, and pushes the arm presser plate 12 upward. At this time, the heat-sensitive plate 13 attached to the lower edge of the cylinder 9 moves upward together, and the engagement between the arm 11 and the arm presser plate 12 is released, and these link mechanisms disassemble and fall downward. The seal of the water outlet 2 is so constructed that it is released when the cap 5 falls to spray water.

Problems to be solved by the invention The deflector 7 described above is a sliding guide rod 6.
It has a structure in which a water spray plate 7a is provided on the lower edge of the head, and a stopper ring 7b made of an annular flat plate is provided on the upper edge of the head. Therefore, the stopper ring 7b can move freely within this gap.

Therefore, when assembling the link mechanism into the cylindrical frame 4, the cylindrical frame 4 with the deflector 7, cap 5, etc. attached is attached to the head body 1 in advance.
The link mechanism must be assembled after screwing onto the flange 3 of the head, and at this time, the cap 5 etc. hit the head body 1 and cannot move upward as shown in the figure, making the assembly work troublesome and time-consuming. There is such a problem.

Furthermore, since the stopper ring 7b of the deflector 7 is loosely fitted into the gap in the lower surface of the head body 1, there is a problem in that when vibration or the like is applied to the spring head, the deflector 7 moves up and down, rattling and producing noise.

To prevent this noise and to use the deflector 7 in the event of a fire.
In order to quickly lower the head body 1, a coil spring (not shown) may be interposed between the lower surface of the head body 1 and the stopper ring 7b.
However, when a coil spring is provided, a problem arises in that the deflector 7 tilts during its descent and gets caught unless the force of the spring is uniformly applied to the stopper ring 7b.

Means for Solving the Problems This invention aims to facilitate the assembly of the link mechanism in a flash type sprinkler head, improve the operability of the link mechanism, and secure the parts of the finished product. In this invention, a stopper ring to be attached to a guide rod that supports a sprinkler plate of a deflector of a flash type sprinkler head is formed in an annular plate body, and a plurality of tongues are formed by making cuts in multiple places in the annular plate body. This is a deflector for a flash type sprinkler head in which the tongue piece is bent to form a leaf spring that always urges the arm guide downward.

Embodiment An embodiment of this invention will be explained with reference to the drawings. FIG. 1 is an exploded view of a deflector 25, which is composed of a guide rod 26, a water sprinkling plate 27, and a stopper ring 28, and the stopper ring 28 is an annular plate. 28a, and L-shaped cuts 28b are made at two places on the annular plate body 28a to form tongue pieces 28c, 28c. The tongue piece 28
c and 28c are bent downward to form a spring piece. Further, the plate body 28a is provided with three recesses 28d into which the neck portion 26a of the guide rod 26 is fitted, and the recesses 28d communicate with a notched guide groove 28e that guides the guide rod 26 to the recess 28d.

The water sprinkling plate 27 also has three through holes 27a for attaching the lower ends of the guide rods 26, elongated holes 27b for dropping the legs 30b of the arm guides 30, and a plurality of blades 27c for uniformly dispersing the water for digestion. is provided.

These are assembled to form a deflector 25 as shown in FIG. 2, and assembled together with the other parts shown in FIG. 2 to obtain a sprinkler head.

Next, a sprinkler head using the deflector 25 of this invention will be explained with reference to FIGS. 3 and 4. 21 is a head body that is attached to a water supply pipe in the ceiling. The cylindrical frame 24 is screwed onto the flange 23, and has a threaded portion 23a inside the flange 23. The cylindrical frame 24 has a load adjustment slit 24a on the circumferential wall and a locking flange for a stopper ring 28 attached to the upper edge of the guide rod 26 of the deflector 25, which is disposed within the cylindrical frame 24 and slides down within the frame 24. 24b at the inner peripheral portion of the lower end. Also, water outlet 22
The board 30 of the arm guide 30 is attached with a cap 29 for sealing the arm guide 30 and falls inside the deflector 25.
cap 29 via the balancer 31 from the bottom surface of a.
The link mechanism constituting the thermal decomposition unit that presses and seals the water discharge port 22 includes a disc-shaped ring piston 33 integrally formed above the rod 32, and
At the upper end edge of 2, there is a link presser plate 3 that supports the shaped portions 34b of the pair of arms 34 that suspend the arms 34a in the load adjustment slits 24a of the cylindrical frame 24.
5. Screw and fix. Further, a cylinder 36 with an open top is loosely fitted to the lower part of the rod 32, and a ring-shaped fusible alloy 37 is loosely fitted into the chamber of the cylinder 36, and further supports the leg portion 34c of the arm 34. The arm support plate 38 is loosely fitted, and a flash type sprinkler head has a link mechanism in which heat-sensitive plates 39 and 40 are screwed and fixed to the lower edge of the rod 32.

Functions and Effects Since the deflector of this invention has the configuration as described above, when the link mechanism is assembled into the cylindrical frame 24, the downward tongue piece 28 of the stopper ring 28
Since the arm guide 30 moves upward due to the elasticity of c, the link mechanism can be assembled very easily without screwing the cylindrical frame 24 onto the head body 21. Since the link mechanism is pressed downward by the tongue piece 28c of the stopper ring 28 whose upward movement is restricted, it is difficult to disassemble the link mechanism when attaching the cylindrical frame 24 to the head body 21.

Also, the water spray plate 27 of the deflector 25 to which the head is assembled is the tongue piece 28c of the stopper ring 28.
Since the deflector 25 is pushed upward by the action of the deflector 25, the deflector 25 will not rattle and will not emit noise even when vibrations are applied.

Furthermore, during operation, the tongue piece 2 of the stopper ring 28
Since the arm guide 30 is pushed downward by the arm guide 8c, the link mechanism is quickly disassembled and the arm guide 30 is quickly seated on the deflector 25, resulting in excellent operability.

Since this invention is as described above, it is easy to assemble the link mechanism in a flash type sprinkler head, improves the operability of the link mechanism, and has the effect of ensuring that the parts of the finished product are securely fixed. .

[Brief explanation of the drawing]

The figures show one embodiment of this invention; Fig. 1 is an exploded view of the deflector of this invention, Fig. 2 is an exploded view of the sprinkler head, Figs. 3 and 4 are sectional views of the sprinkler head, and Fig. 5 is an exploded view of the deflector of this invention. The figure is a cross-sectional view of a conventional sprinkler head. 25... Deflector, 26... Guide rod,
26a...Neck of guide rod, 27...Water plate, 27a...Through hole, 27b...Long hole, 27c...
...Blade, 28... Stopper ring, 28a... Annular plate, 28b... Notch, 28c... Tongue, 28d... Recess, 28e... Guide groove, 30...
...Arm guide, 30b...leg.

Claims (1)

[Claims for Utility Model Registration] 1. A stopper ring to be attached to a guide rod that supports a water spray plate of a deflector is formed in an annular plate body, cuts are provided in the annular plate body to form a plurality of tongue pieces, A deflector for a flash type sprinkler head, characterized in that the tongue piece is bent to form a leaf spring that constantly urges an arm guide downward. 2. The deflector for a flash type sprinkler head according to claim 1, wherein the annular plate is provided with a guide groove having a recess that fits into the neck of the guide rod. 3. The deflector for a flash type sprinkler head according to claim 1, wherein the sprinkler plate is provided with a through hole for attaching a leg of a guide rod. 4. The flash type sprinkler head according to claim 1, wherein the water sprinkler plate has a long hole for dropping the leg of the arm guide.