JP5025568B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head.

  An example of a conventional sprinkler head is proposed in, for example, Japanese Patent Laid-Open No. 7-231949 (Patent Document 1). The main body of the sprinkler head is composed of a head main body having a male screw portion screwed into a pipe at an upper portion and a cylindrical frame screwed into the head main body. The head main body has a water outlet at the center, and the water outlet is closed by a valve body. Further, the frame is formed with a step portion protruding inward, and a thermosensitive decomposition portion as a link mechanism is locked to the step portion to support the valve body from below. Further, the stepped portion of the frame is adapted to be locked by a stopper ring that suspends the deflector during water discharge.

  When such a spring head is assembled, there is a stepped portion projecting inward inside the frame, so that a part cannot be inserted from the bottom of the frame. For this reason, at the time of assembly, first, a thermal decomposition part is inserted from the upper part of the frame, and a watering part such as a deflector (stopper ring / valve body) is inserted, and finally, the head body is screwed into the frame, so that the sprinkler Assembling the head.

JP-A-7-231949

A conventional spring head has a problem that cutting is troublesome because the frame is manufactured by cutting as described above because of the shape having a step inside.
In addition, the parts such as the thermal decomposition part are put in order from the top of the frame for assembly, so the head body and the frame are always required as separate parts, which increases the number of parts. is there.

  The present invention has been made to solve such problems, and has as its first object to provide a sprinkler head that facilitates the manufacture of a frame, and further enables the number of parts to be reduced. A second object is to provide a sprinkler head.

The sprinkler head according to the present invention is connected to a head body having a cylindrical portion in which a water outlet normally closed by a valve body is formed, and is connected to a lower portion of the head body, and is longer than the cylindrical portion. A cylindrical frame portion formed on the outside, a thermal decomposition mechanism that supports the valve body, a deflector connected to the valve body, a stopper ring connected to the deflector via a support, and the cylindrical portion A sprinkler head having a gap into which a deflector assembly having the deflector, the support column, and the stopper ring is inserted, and is normally formed on the inner wall of the frame portion. and an annular groove has, biased to extend outwardly, partially protruded from the inside inner wall of the frame portion to the stopper ring engaging at watering In the so that and a retaining ring mounted on the groove, the opening of the frame portion bottom when inserting the deflector assembly, inserted in a compressed state pushes the retaining ring, the groove Assemble to put on .
In the sprinkler head according to the present invention, the head main body and the frame portion are integrally formed .

The sprinkler head according to the present invention is configured as described above, and by forming an annular groove on the inner wall of the cylindrical frame portion and mounting the retaining ring so as to protrude inward into the groove, This retaining ring can lock the stopper ring in the event of a fire. For this reason, it is not necessary to form the level | step difference which protruded in the inner wall of the flame | frame part, and the trouble that cutting is troublesome like before is solved at the time of manufacture. In addition, since there is no step projecting on the inner wall of the frame portion, it is possible to insert and incorporate assembly parts from one direction, which makes it easy to manufacture.
Further, in the sprinkler head according to the present invention, the head main body and the frame portion are integrally formed, and the number of parts is reduced, so that the number of manufacturing steps can be reduced .

Embodiment 1. FIG.
1A and 1B are a front view and a longitudinal sectional view of a sprinkler head according to Embodiment 1 of the present invention, FIG. 2 is a longitudinal sectional view of an integrated head body and a frame portion, and FIG. 3 is a view of a deflector assembly. It is a longitudinal cross-sectional view. 4A to 4D are a top view, a bb cross-sectional view, a cc cross-sectional view and a dd cross-sectional view of the locking member holder, and FIG. 5 is a cross-sectional view and a bottom view of the heat sensitive portion. These are the longitudinal cross-sectional view and bottom view of a piston.

  As shown in FIGS. 1 and 2, the sprinkler head 1 includes a head body 10. The head body 10 has a water outlet 11 in the center thereof. A flange 12 is formed in the lower part of the head body 10, and a screw part 13 connected to a water supply pipe is provided on the outer periphery of the head body 10 on the upper side of the flange 12. The frame part 20 is integrally formed. A cylindrical portion 14 is formed on the inner side of the frame portion 20 so as to protrude downward, and a water outlet 11 is formed on the inner side of the cylindrical portion 14.

  Further, the sprinkler head 1 includes a cylindrical frame portion 20 formed integrally with the head body 10 as shown in FIGS. 1 and 2. The frame portion 20 is formed longer than the cylindrical portion 14, and an annular groove portion 21 is provided at a height position substantially the same as the lower end of the cylindrical portion 14 on the inner wall of the frame portion 20. A retaining ring 22 urged so as to spread outward is attached to the groove portion 21. In the holding ring 22, the outer half of the ring enters the groove portion 21, and the inner half protrudes inward from the inner peripheral surface of the frame portion 20, thereby forming a step on the inner peripheral surface of the frame portion 20. A tapered surface 23 having a larger diameter is formed on the lower end of the frame portion 20, so that a part such as the holding ring 22 can be easily inserted. Between this taper surface 23 and the groove part 21, the cyclic | annular groove part 24 for hold | maintaining the below-mentioned thermal decomposition mechanism 40 is formed. A tapered surface whose diameter decreases upward is provided on the upper portion of the groove portion 24.

  As shown in FIGS. 1 and 3, the sprinkler head 1 includes a deflector assembly 30, and the deflector assembly 30 includes a valve body 31, a disc spring 32, a deflector 33, a column 34, and a stopper ring 35. And is inserted into a gap 15 (see FIG. 2) formed between the frame portion 20 and the cylindrical portion 14.

  The valve body 31 is for closing the water discharge port 11 of the head main body 10, and as shown in FIG. 3, the main body 31a having an outer diameter slightly larger than the inner diameter of the cylindrical portion 14 of the head main body 10, and the main body The head 31b is provided on the central upper surface of the portion 31a and is inserted into the water outlet 11 of the head body 10. A disc spring 32 is interposed between the valve body 31 and the water discharge port 11. The disc spring 32 is formed of, for example, a circular disc spring coated with a fluororesin and having a substantially C-shaped cross section. The disc spring 32 contacts the lower end edge (water outlet end edge) of the cylindrical portion 14 of the head body 10.

  A donut-shaped deflector 33 having a disc shape and having a through hole in the center is connected (fixed) to the lower surface of the valve body 31. This deflector 33 has a through hole in which the support 34 is loosely fitted in the circumferential direction, and has an outer diameter smaller than the inner diameter of the frame portion 20, and the inner diameter of the through hole is outside the main body portion 31 a of the valve body 31. It is formed smaller than the diameter, and holds and fixes the valve body 31. The deflector 33 is connected to a stopper ring 35 through a support 34. The stopper ring 35 is formed so that its inner diameter is slightly larger than the outer diameter of the cylindrical portion 14 of the head body 10, the outer diameter is smaller than the inner diameter of the frame portion 20, and is locked to the holding ring 22 when it is lowered during water discharge. The size is formed. The inner diameter side of the stopper ring 35 is formed in a cylindrical shape, and is guided by the cylindrical portion 14 when the stopper ring 35 is lowered.

  In addition, the sprinkler head 1 includes a thermal decomposition mechanism 40, and the thermal decomposition mechanism 40 includes a locking member holder 41 and a thermal part 51.

  The locking member holder 41 is provided at the lower end of the frame portion 20 and is slidably disposed in the frame portion 20, and details thereof are shown in FIGS. 4 (a) to 4 (d). 4A is a plan view, FIG. 4B is a cross-sectional view taken along line bb in FIG. 4A, FIG. 4C is a cross-sectional view taken along line cc in FIG. 4A, and FIG. These are dd sectional drawing of the figure (b).

  As shown in FIGS. 4A to 4D, the locking member holder 41 has a cylindrical shape with a top plate 42 formed on the top. The upper top plate 42 is provided with a screw hole 44 through which the adjustment screw 43 is inserted, and four ball insertion holes 45 are formed on the side surface of the cylindrical portion, for example. Further, a groove portion 46 into which the heat sensitive portion holding ring 55 is inserted is formed on the inner peripheral surface of the cylindrical portion, and a tapered surface 47 having a diameter increasing outward is formed below the groove portion 46. A flange portion 48 is formed at the lower portion of the cylindrical portion, and the upper surface of the flange portion 48 and the lower end surface of the frame portion 20 are in contact with each other. The outer shape of the cylindrical portion of the locking member holder 41 is formed slightly smaller than the inner diameter of the frame portion 20. A lock ball 49 made of a steel material is inserted into the ball insertion hole 45 of the locking member holder 41, and a C-shaped ring (locking member) 50 having a notch in part for pressing the lock ball 49 inward is inserted on the outside thereof. It is attached. The C-shaped ring 50 is partially inserted into the groove portion 24 of the frame portion 20 so that the thermal decomposition mechanism 40 does not fall from the frame portion 20. The diameter of the ball insertion hole 45 is assumed to be larger than the outer diameter of the lock ball 49, and moves inward by the lowering of the piston 57 (see FIGS. 1B and 6).

  As shown in FIG. 1B, the heat sensitive part 51 includes a cylinder 52, a heat sensitive part holding ring 55, a fusible alloy 56, and a piston 57. As shown in FIGS. 5 (a) and 5 (b), the cylinder 52 is formed in a bottomed cylindrical shape, and includes a disk-shaped heat sensitive plate 53 on the outer wall thereof. Further, the heat sensitive plate 53 on the upper side of the cylinder 52 is thickened on the outer side, and a groove portion 54 is formed on the outer peripheral wall thereof. The groove portion 54 is disposed to face the groove portion 46 of the locking member holder 41, and the heat sensitive portion holding ring 55 is mounted across the groove portion 54 and the groove portion 46 of the locking member holder 41, so that the cylinder 52 is It is held by the locking member holder 41. The fusible alloy 56 is a thermal element made of, for example, compression solder, and is housed in the lower part of the cylinder 52 and melted by heat.

  As shown in FIGS. 6A and 6B, the piston 57 is formed in a T-shaped cross section, and is accommodated in the cylinder 52 so as to be slidable on the fusible alloy 56. A tapered surface 57a is formed on the outer peripheral portion of the piston 57, and the tapered surface 57a supports the lock ball 49 so that the lock ball 49 of the locking member holder 41 does not fall inward. That is, the lock ball 49 is urged inward by the C-shaped ring 50, but the tapered surface 57 a abuts against the lock ball 49 and restricts its movement.

In the sprinkler head 1 as described above, pressurized fire-extinguishing water is supplied, and the valve body 31 seals the water outlet 11 of the head body 10 so that the fire-extinguishing water does not leak. In this state, the water pressure of the fire extinguishing water at the outlet 11 and the assembly load of the parts act on the C-shaped ring 50 via the deflector assembly 30 and the locking member holder 41. Since the surface contact (or line contact) is made on the lower surface side of the groove portion 24 of the frame portion 20, the biting caused by the point contact does not occur. The C-shaped ring 50 always acts to move the lock ball 49 inward, but since the movement is blocked by the tapered surface 57a of the piston 57, the C-shaped ring 50 is held at that position, and the locking member holder The state where 41 is held by the frame unit 20 continues. Further, the thermosensitive part 51 is engaged with the locking member holder 41 by the thermosensitive part holding ring 55, and as a result, the thermosensitive decomposition mechanism 40 is held by the frame part 20. The deflector assembly 30 is directly held by an adjusting screw 43 attached to the locking member holder 41. To adjust the spring force of the disc spring 32, the position of the adjusting screw 43 is adjusted. To do. In this way, the deflector assembly 30 and the thermal decomposition mechanism 40 are accommodated in the frame portion 20 and the positions thereof are held. The heat-sensitive part holding ring 55 and the holding ring 22 are both annular ring bodies having a notch in the same manner as the C-type ring 50, but unlike the C-type ring 50, these are outside on the assembled state. It is urged to expand, and only the C-shaped ring 50 is urged to shrink inward.

An example of an assembly method of the sprinkler head 1 will be described.
7 and 8 are process diagrams showing the assembly process of the sprinkler head 1 in time series. 7 and 8 show the cut end face, but the description of hatching and the like is omitted. The head main body 10 and the frame portion 20 are placed with their vertical directions reversed (FIG. 7A), and the deflector assembly 30 is inserted into the opening at the bottom of the frame portion 20 (FIG. 7B). When inserting the deflector assembly 30, the holding ring 22 is attached to the groove portion 21.
The process up to this point will be described in detail. Since the holding ring 22 usually has an outer diameter larger than the inner diameter of the frame portion 20 of the head body 10, it is slightly compressed in the radial direction and is held in the frame 20. insert. Since the diameter of the tapered surface 23 at the lower end of the frame portion 20 is large, the holding ring 22 can be easily inserted. The holding ring 22 is inserted into the groove portion 21 side of the frame portion 20 so as to be pushed by the deflector 33 of the deflector assembly 30.
The retaining ring 22 that has passed through the tapered surface 23 first fits into the groove portion 24. However, since the upper portion of the groove portion 24 is a tapered surface, the deflector 33 is pushed in so that the tapered surface is overcome. Then, it is held in the groove 21. Thus, the state shown in FIG.
Then, the locking member holder 41 is mounted thereon. In this case, it is assumed that the lock ball 49 and the C-shaped ring 50 are mounted on the locking member holder 41 (FIG. 7C). Since the C-shaped ring 50 is a spring that shrinks inward, it can be easily inserted into the frame portion 20. Subsequently, the piston 57 is mounted (FIG. 8D), and the lock ball 49 is pushed outward by the tapered surface 57a, whereby the C-shaped ring 50 is fitted into the groove portion 24. Then, the cylinder 52 in which the fusible alloy 56 is housed is mounted (FIG. 8E). When mounting the cylinder 52, it is assumed that the heat-sensitive part holding ring 55 is mounted in the groove part 54, and the heat-sensitive part holding ring 55 is mounted across the groove part 54 of the cylinder 52 and the groove part 46 of the locking member holder 41. Is done. The attachment of the heat-sensitive part holding ring 55 is the same as the attachment of the holding ring 22. Initially, since the opening at the lower end of the locking member holder 41 is a tapered surface 47, the heat-sensitive part holding ring 55 is inserted. It is easy to do. The heat-sensitive part holding ring 55 that has passed over the tapered surface 47 spreads outward and is fitted and held in the groove part 54.
When the sprinkler head in which the parts are incorporated in this way is turned upside down, the state shown in FIGS. 1A and 1B is obtained. In this way, in the assembly, it is possible to assemble by sequentially inserting the internal components on one axis, that is, without tilting the components. Moreover, since no screwing work is required, it is easy to automate the assembly in the factory . In the above description, the example in which the components of the thermal decomposition mechanism 40 are individually incorporated has been described. However, the thermal decomposition mechanism 40 may be assembled and then incorporated.

Next, the operation of the sprinkler head 1 will be described.
FIGS. 9A and 9B are diagrams showing an operation process of the sprinkler head 1.
In the monitoring state of the sprinkler head 1, pressurized fire extinguishing water is supplied to the water outlet 11 of the head body 10, and the pressure of the fire extinguishing water is applied to the valve body 31 (FIG. 1B). reference). When a fire occurs, when the hot airflow hits the heat sensitive plate 53, the heat sensitive plate 53 is heated and the heat propagates to the cylinder 52. Then, the fusible alloy 56 accommodated in the cylinder 52 starts to be heated and melted from the surroundings, and the melted fusible alloy 56 flows out between the cylinder 52 and the piston 57 to reduce its volume (FIG. 9). (A)).

  When the fusible alloy 56 melts and the volume of the lower part of the piston 57 decreases, the piston 57 descends corresponding to the decrease in the volume. When the piston 57 descends, the lock ball 49 urged inward by the C-shaped ring 50 moves inward beyond the tapered surface 57a of the piston 57, whereby the C-shaped ring 50 also moves inward. . By the movement of the C-shaped ring 50, the engagement between the thermal decomposition mechanism 40 and the frame portion 20 is released. As a result, the thermal decomposition mechanism 40 is lowered by its own weight, the spring force of the disc spring 32, and the water pressure of the fire extinguishing water, and is detached from the frame portion 20 and dropped. At the same time, the deflector assembly 30 including the valve body 31 also falls due to its own weight, the spring force of the disc spring 32 and the water pressure of the fire extinguishing water, and the stopper ring 35 engages with the holding ring 22 attached to the groove portion 21 of the frame portion 20. Then, it is held in a state of being suspended from the frame portion 20 (FIG. 9B). With the above operation, the water outlet 11 of the head body 10 is opened, and the fire extinguishing water is sprayed from the deflector 33 to extinguish the fire.

As described above, in the present embodiment, the annular groove portion 21 is formed on the inner wall of the cylindrical frame portion 20, and the holding ring 22 is attached to the groove portion 21 so as to protrude inward. Since the ring 22 locks the stopper ring 35 in the event of a fire, there is no need to form a stepped protrusion on the inner wall of the frame portion 20, and cutting is troublesome as in the prior art during production. The problem is solved.
Moreover, since there is no level | step difference which protruded in the inner wall of the flame | frame part 20, as shown in FIG.7 and FIG.8, it is possible to insert an assembly part from one direction and to incorporate, and it is easy to manufacture. It has become a thing.
Moreover, the sprinkler head 1 of this embodiment has the head main body 10 and the frame part 20 formed integrally, and the number of parts is reduced, so that the number of manufacturing steps can be reduced.

  Further, the sprinkler head 1 of the present embodiment uses the heat sensitive part holding ring 55 to fix the heat sensitive part 51 to the locking member holder 41 fixed to the frame part 20. The heat sensitive part 51 is fixed by a force spreading outside the heat sensitive part holding ring 55. For example, when a screw structure is used to fix the heat-sensitive part 51, a rotational force is applied to the fusible alloy 56, which is a heat-sensitive element, during assembly, which may cause creep in the fusible alloy 56. However, in this embodiment, since the heat sensitive part holding ring 55 is used, the heat sensitive part 51 can be easily fixed only by moving in one axial direction, and no rotational force is applied to the fusible alloy 56. Can be suppressed. In addition, when a columnar material is used as the fusible alloy 56, the load per area is reduced even in comparison with the doughnut-shaped material, so that the occurrence of creep is also suppressed from this point.

  In this embodiment, as a mechanism for engaging the frame portion 20 and the thermal decomposition mechanism 40, a C-shaped ring 50 is provided outside the lock ball 49 so that a load such as water pressure is not applied to the lock ball 49. The C-shaped ring 50 is received. For this reason, the C-shaped ring 50 acts as a surface load (or at least a linear load) on the groove portion 24 of the frame portion 20, so that the groove portion 24 of the frame portion 20 that occurs when the load is directly applied by the lock ball 49. No biting (biting) occurs. Therefore, it is possible to make it difficult for malfunctions to occur.

  Further, in the present embodiment, the locking member holder 41 is formed with a flange portion 48 that is expanded in the outer peripheral direction at the lower portion thereof, and the upper surface of the flange portion 48 and the lower surface of the frame portion 20 are in contact with each other. Therefore, even if an impact force is applied to the flange portion 48, the impact force is transmitted to the frame portion 20 side and is not transmitted to the valve body 31, the cylinder 52, or the like. For this reason, damage is avoided and there is no fear of water leakage. In particular, since the C-shaped ring 50 in the locking member holder 41 is in linear contact with the groove portion 24 of the frame portion 20, the entire C-shaped ring 50 can absorb the impact force, so that the structure is strong against impact.

In the above embodiment, the example in which the lock ball 49 and the C-shaped ring 50 are provided on the outer peripheral side of the locking member holder 41 has been described. However, other configurations may be used as long as the ring body is biased inward. For example, you may make it comprise only the C-shaped ring 50d, without using the lock ball 49 as an engaging member.
Moreover, although the example using the cylindrical thing as a thermal element was demonstrated, the shape may employ | adopt arbitrary shapes. Further, the head body and the frame portion may be configured separately. The fusible alloy serving as the heat sensitive element may not be an alloy, and may be a fusible piece made of resin, for example.
Further, although the frame portion has been described as being integrally formed with the head body, these may be configured as separate structures, or the present invention may be applied to a structure in which the frame portion is screwed into the head body. Good.
In addition, the thermal decomposition mechanism has been described using balls and rings, but the thermal decomposition mechanism is not limited to balls and rings, and the thermal decomposition mechanism may be configured by a link mechanism using a pair of levers. Any other thermal decomposition mechanism may be used as long as it supports the body and decomposes or ruptures in the event of a fire.

It is the front view and longitudinal cross-sectional view of the sprinkler head which concern on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of a head main body and a frame part. It is a longitudinal cross-sectional view of a deflector assembly. It is a top view of a locking member holder, bb sectional view, cc sectional view, and dd sectional view. It is sectional drawing and a bottom view of a heat sensitive part. It is the longitudinal cross-sectional view and bottom view of a piston. It is process drawing (the 1) which showed the assembly process of the sprinkler head in time series. It is process drawing (the 2) which showed the assembly process of the sprinkler head in time series. It is the figure which showed the operation | movement process of the sprinkler head.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Sprinkler head, 10 Head main body, 11 Water outlet, 12 Flange, 13 Thread part, 14 Cylindrical part, 20 Frame part, 21 Groove part, 22 Retaining ring, 23 Tapered surface, 24 Groove part, 25 Gap, 30 Deflector assembly, 31 Valve Body, 31a body, 31b head, 33 deflector, 34 strut, 35 stopper ring, 40 thermal decomposition mechanism, 41 locking member holder, 42 top plate, 43 adjustment screw, 44 screw hole, 45 ball insertion hole, 46 groove , 47 Tapered surface, 48 Flange part, 49 Rock ball, 50 C-type ring, 51 Thermal part, 52 Cylinder, 53 Thermal plate, 54 Groove part, 55 Thermal part retaining ring, 56 Soluble alloy, 57 Piston, 57a Tapered surface.

Claims (2)

A head body having a cylindrical portion in which a water discharge port that is normally closed by a valve body is formed ;
A cylindrical frame portion connected to the lower portion of the head body, longer than the cylindrical portion, and formed on the outside thereof;
A thermal decomposition mechanism for supporting the valve body;
A deflector connected to the valve body;
A stopper ring connected to the deflector via a support ;
Formed between the cylindrical portion and the frame portion, and normally, a gap into which a deflector assembly having the deflector, the support column, and the stopper ring is inserted;
In sprinkler head with
An annular groove formed in the inner wall of the frame part ;
Is biased to extend outwardly, and a retaining ring mounted on the groove as the portion from the inner wall of the frame portion so as to stop the ring engages the inner side protrudes during watering,
When inserting the deflector assembly into the opening at the bottom of the frame part ,
A sprinkler head, wherein the retaining ring is inserted so as to be compressed and assembled so as to be attached to the groove . The sprinkler head according to claim 1, wherein the head main body and the frame portion are integrally formed.

Images