JP2012040165A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head for extinction, allowing low-cost production, and exerting desired water sprinkling performance.SOLUTION: One end side of body 1 is connected with a water supply pipe and is installed with a nozzle thereinside. The other side is installed with a thermosensitive decomposition part 4 supporting a valve 3 closing the nozzle in normal time, and performing decomposition operation in time of a fire. An outer circumferential part of the body 1 includes a deflector locking part 2G having the tip capable of being installed with a deflector 5 splashing water discharged from the nozzle in all directions. A face on the nozzle side of the deflector 5 is installed with a disk D. The disk D has legs D1 in an edge part, and is installed by inserting the legs D1 through holes in the deflector 5.

Description

The present invention relates to a sprinkler head.

The sprinkler head is installed on the ceiling or wall and operates in the event of a fire to spread water and extinguish the fire. As an example of the sprinkler head, there is a sprinkler head in which a deflector is installed below the thermal decomposition section (see, for example, Patent Document 1).

The sprinkler head described in Patent Document 1 includes a cover plate 65 formed flat with a ceiling surface. The deflector 51 and the thermal decomposition portion 40 disposed inside the ceiling by the cover plate 65 are concealed so that they cannot be seen from the indoor side.

The sprinkler head described above is excellent in design without impairing the indoor aesthetics.

JP 2003-339901 A

In the sprinkler head of Patent Document 1, a deflector 51 is installed below the thermal decomposition unit 40. The deflector has an action of scattering water discharged from the nozzles in all directions, and a plurality of slits are formed at the edge.

However, in order to obtain a desired watering performance, a projecting disk may be installed on the deflector 51. However, it is often difficult to integrally form the disk with the deflector depending on the watering performance and its shape. In general, a disk is formed by cutting and then assembled to a plate-shaped deflector, so that the number of processing steps is large, resulting in an increase in cost.

In view of the above problems, an object of the present invention is to provide a sprinkler head that can be manufactured at low cost and obtains a desired watering performance.

In order to achieve the above object, the present invention provides the following sprinkler head.
In the present invention, one end side of the main body is connected to a water supply pipe and a nozzle is installed therein, and the other end side is provided with a valve that closes the normal time nozzle, and a thermal decomposition unit is installed that operates in the event of a fire. In the sprinkler head provided with a deflector locking portion that can be installed at the tip of the deflector that scatters the water discharged from the nozzle in all directions on the outer periphery of the main body,
A disk is installed on the surface of the deflector on the nozzle side, the disk has a leg at the edge, and the leg is installed through a hole on the deflector.

  By installing a disk, the watering performance of the deflector is stabilized. For example, if the water discharged from the nozzle was turbulent and the disk was installed, the water would flow over the deflector after colliding with the disk, so it was in a turbulent state by causing water to collide with the disk. It has the effect of rectifying the water and flowing it over the deflector.

Further, by press-molding the disk from a plate material, it becomes possible to easily form a shape that is difficult to process by cutting. For example, a non-circular polygonal shape or a shape such as a groove, hole, or protrusion can be easily formed on the surface. By installing the non-circular disk as described above on the deflector, it is possible to obtain a desired watering performance.

In the present invention, the tip of the leg of the disk that penetrates the deflector is bent.
As a result, the disk is fixedly installed on the deflector, and it is possible to prevent the disk from being detached or inclined due to the momentum of the water discharged from the nozzle.

In the present invention, the cross-sectional shape of the disk is non-circular.
Thereby, the shape of a disk can be made into shapes other than circular, for example, a rectangle, a star shape, and an ellipse, and the target watering performance can be obtained. Furthermore, shapes other than the above circles can be easily formed by forming by pressing.

According to the present invention, by forming the disk by press working, it is possible to easily form a shape that is difficult to process by cutting, and it is possible to manufacture a disk having a non-circular cross-sectional shape. This makes it possible to obtain the desired watering performance.

Sectional view of the sprinkler head of the present invention Front view of the main body of the sprinkler head of FIG. Side view of FIG. Cross section of thermal decomposition part Disassembled perspective view of thermal decomposition unit Exploded sectional view of cylinder plunger Top view of deflector Disc perspective view Sectional view during construction of the sprinkler head of FIG. XX sectional view of FIG. Enlarged view of part Y in FIG. Illustration of another embodiment of the disk Explanatory drawing of other embodiment of a slit (ZZ sectional drawing of FIG. 7).

Hereinafter, embodiments of the sprinkler head of the present invention will be described with reference to FIGS.
The sprinkler head A includes a main body 1, a valve body 3, a thermal decomposition unit 4, a deflector 5, a support cup 6, and a cover plate 7, and is configured as a conshielded sprinkler head.

The main body 1 shown in FIGS. 1 to 3 is hollow, and one end is a pipe connecting portion 1A in which a male screw that can be connected to a filled pipe is formed. The other end of the pipe connection 1A is a water outlet 1B. The end of the water outlet 1 </ b> B is closed by the valve body 3.

Between the pipe connecting part 1A and the water outlet 1B, a support cup locking part 1C having a polygonal cross-sectional shape at the outer peripheral part is formed. A flange having a larger outer periphery than the outer periphery of the support cup locking portion 1C is formed on the side of the water outlet 1B from the support cup locking portion 1C, and a cylindrical shape is formed from the edge of the hook portion toward the water discharge side. A frame portion 2 is formed. The main body 1 is composed of the above-described pipe connecting part 1A and a frame part 2 having a larger outer peripheral surface than the pipe connecting part 1A.

The outer peripheral cross-sectional shape of the frame portion 2 is a shape in which two portions of a circle are notched in parallel. Specifically, two notched straight portions and an arc portion between each straight portion are formed. ing. Accordingly, a curved surface portion 2A having a circular arc cross section and a flat surface portion 2B having a straight cross section are formed on the outer peripheral surface of the frame portion 2. The flat surface portion 2B is formed as a notch surface portion formed so as to cut out the outer peripheral surface of the frame portion 2 from the pipe connection portion 1A side to a beam-like portion 2J described later, and an opening 2E is formed there. The outer peripheral cross-sectional shape of the lower part of the frame part 2 is a circle having the same radius as the curved surface part 2A without the flat part 2B. That is, a beam-like portion 2J made of an arc-shaped portion erected along the circumferential direction of the frame portion 2 is formed below the plane portion 2B. The beam-like part 2J is formed at an opposing position with the cylinder axis of the frame part 2 as the center.

An inner flange 2 </ b> C that is formed to extend inward is formed on the inner peripheral lower portion (the lower portion of the curved surface portion 2 </ b> A and the inner peripheral surface of the beam-shaped portion 2 </ b> J) of the frame portion 2. Lever insertion grooves 2D and 2D are formed in the inner flange 2C located below the curved surface portion 2A (FIG. 1).

An opening 2E is formed in the flat surface portion 2B of the frame portion 2 rotated approximately 90 ° from the lever insertion groove 2D. The opening 2E is formed by cutting the inside of the frame part 2 with a diameter smaller than the outer diameter of the curved part 2A and larger than the dimension between the two plane parts 2B.

The inner flange 2C of the beam-like portion 2J located below the opening 2E serves as a lever locking portion 2F to which a lever 11 of a thermal decomposition portion 4 described later is locked. By providing the lever locking portion 2F on the beam-like portion 2J below the opening 2E, when a load is applied to the lever locking portion 2F from the water outlet 1B side to the lower end side of the frame portion 2, the beam-like portion 2J is applied. Although the elastic deformation is caused by the applied load, the amount of deformation due to the elastic deformation of the beam-like portion 2J can be increased as compared with the case where the opening 2E is not provided. The elastic deformation (deflection) of the beam-like portion 2J becomes a spring force, and the spring force has an action of splashing the components of the thermal decomposition portion 4 to the outside when the sprinkler head A is operated. Function to prevent.

On the outer peripheral side of the lever insertion groove 2D, there is formed a deflector locking portion 2G formed to hang downward from the lower end of the frame portion 2. A step portion 2H that can accommodate the valve body 3 is formed at the boundary between the frame portion 2 and the water outlet 1B. The movement when the valve body 3 is displaced from the water discharge port 1B due to vibration, impact, or the like by the step portion 2H is retained in the step portion 2H, and the valve body 3 is displaced from the water discharge port 1B so that the water in the water discharge port 1B is discharged. Prevents leakage.

The valve body 3 has a disk shape and is accommodated in the step 2H described above. The valve body 3 is pressed against the end of the water outlet 1B by a compression screw 21 to be described later and closes the water outlet 1B.

The thermal decomposition portion 4 is locked to an inner flange 2C (lever locking portion 2F) formed on the beam-like portion 2J of the frame portion 2, and in the event of a fire, the thermal decomposition portion 4 is decomposed by the heat of the fire to release the valve body 3. The thermal decomposition unit 4 includes a lever 11, a support plate 12, a balancer 13, a cylinder 14, a plunger 15, a low melting point alloy 16, and a set screw 17.

The thermal decomposition unit 4 is configured as a unit part as shown in FIG. 4 and can be stored and transported as a unit part. Even when the sprinkler head is assembled, it is incorporated into the main body 1 in the state of unit parts shown in FIG.

The lever 11 is used as a pair, and has one end that is locked to the inner flange 2C and bent outward. A protrusion 11A provided symmetrically is formed on the upper portion of the lever 11 (FIG. 5), and a rectangular hole 11B is formed on the lower portion. A support plate 12 and a balancer 13 are locked between the pair of levers 11, the support plate 12 is locked to the protrusion 11A, and the balancer 13 is locked to the lower hole 11B. A hole 13A is formed in the center of the balancer 13, and the cylinder 14 is inserted into the hole 13A.

The cylinder 14 has a cylindrical shape, and a step is formed inside, and a large diameter portion 14A and a small diameter portion 14B are formed. An annular low melting point alloy 16 is accommodated in the large diameter portion 14A. A flange portion 14C is formed at the end on the large diameter portion 14A side, and the flange portion 14C engages with the hole 13A of the balancer 13. The inner diameter of the small diameter portion 14B is substantially equal to the inner diameter of the annular low melting point alloy 16.

The tip of the small diameter portion 14B is bent in a state where the heat collectors 18 and 19 are sandwiched, and the heat collectors 18 and 19 are installed in the cylinder 14. The heat collectors 18 and 19 are made of a metal such as copper or a copper alloy having good thermal conductivity, and have a function of absorbing heat from a fire and transmitting it to the low melting point alloy 16 in the cylinder 14.

A large-diameter portion 15A and a small-diameter portion 15B are formed on the outer peripheral portion of the plunger 15 by steps. The outer diameter of the large diameter portion 15 is slightly smaller than the inner diameter of the large diameter portion 14A of the cylinder 14. The outer diameter of the small diameter portion 15 </ b> B is slightly smaller than the inner diameter of the small diameter portion of the cylinder 14 and the inner diameter of the low melting point alloy 16.

The plunger 15 is inserted from the large diameter portion 14 </ b> A side of the cylinder 14, and the small diameter portion 15 </ b> B and the step portion 15 </ b> C at the boundary between the large diameter portion 15 </ b> A and the small diameter portion 15 </ b> B are in contact with the low melting point alloy 16. In a state where the plunger 15 is inserted into the cylinder 14, the outer peripheral surface of the plunger 15 is slidable with the inner peripheral surface of the cylinder 14 </ b> B and the low melting point alloy 16.

The plunger 15 has a through hole 15D, and a step portion 15E with which the tip of the set screw 17 contacts is formed in the middle of the through hole 15D.

The set screw 17 has a cylindrical shape, and external screws 17A are threaded on the outside. When the male screw 17A is screwed into the female screw 12A of the support plate 12, the tip of the set screw 17 presses the step portion 15E of the plunger 15, so the low melting point alloy 16 becomes the step portion 15E of the plunger 15 and the bottom portion of the cylinder 14. The force in the compression direction is applied by 14D.

A force is also applied to the support plate 12 and the balancer 13 engaged with the pair of levers 11 in such a direction that the engagement with the lever 11 is strengthened, and the engagement state of the lever 11, the support plate 12 and the balancer 13 is maintained. Thereby, the thermal decomposition part 4 is comprised as a unit.

A saddle 20 is installed between the thermal decomposition unit 4 and the valve body 3. The saddle 20 is formed of a metal plate material, and a recess 20A is formed on one surface where the pair of levers 11 are engaged. A female screw 20B is screwed between the recesses 20A and 20A, and a compression screw 21 is screwed into the female screw 20B. The compression screw 21 and the saddle 20 constitute a load generating member of the present invention.

When the compression screw 21 is screwed into the female screw 20B from the thermal decomposition part 4 side toward the valve body 3, the tip of the compression screw 21 presses the valve body 3, and the valve body 3 is pressed against the end of the water outlet 1B. The water outlet 1B is closed, and the inner flange 2C of the frame portion 2 where the pair of levers 11 are locked is pressed downward. As a result, the beam-like portion 2J is elastically deformed to cause a slight displacement. Due to the displacement due to the deflection of the beam-like portion 2J, a spring force is generated that causes the components of the thermal decomposition portion 4 to fly out of the frame portion 2 during the decomposition operation. In the present embodiment, a load necessary for water-stopping of the valve body 3 and bending deformation of the beam-like portion 2J can be obtained by a simple component configuration and a simple assembling operation using the compression screw 21 and the saddle 20.

The deflector 5 is flat and has a plurality of notched slits 5A formed around it. The slit 5A is provided to obtain the desired watering performance. The slit 5A generally has a shape that is cut out from the upper surface to the lower surface of the deflector 5. However, the slit 5A may have a shape in which only the upper surface of the deflector 5 is recessed.

A hemispherical disk D is fixedly installed on the deflector 5. The disk D is a thin plate formed into a hemispherical shape by press working, and a plurality of legs D1 hang from the periphery. After the leg D1 is inserted into the hole 5F drilled on the deflector 5, the leg D1 is bent and the disk D is fixedly installed on the deflector 5.

The deflector 5 has holes 5B and 5B into which the guide pins 5C are fitted, and one end of the guide pin 5C is inserted into the hole 5B and fixed by caulking. The guide pin 5C is inserted into a hole 5E formed in the deflector locking portion 2G of the main body 1. The guide pin 5C can slide while being inserted into the hole 5E. A flange portion 5D is formed on the other end side of the guide pin 5C and can be locked to the end surface of the hole 5E of the deflector locking portion 2G of the main body 1.

In FIG. 1, the upper end of the guide pin 5C is disposed in contact with or close to a base plate 6E described later, and prevents the guide pin 5C from moving further upward. In this case, the disc D on the deflector 5 fixed to the lower end side of the guide pin 5 </ b> C has an action of preventing interference with the thermal decomposition unit 4.

The support cup 6 is a bottomed cylindrical member that covers the outside of the frame portion 2 of the main body 1. An opening 6B that can be fitted to the support cup locking portion 1C of the main body 1 is formed in the bottom portion 6A of the support cup 6. The support cup 6 can be prevented from rotating with respect to the main body 1 by fitting the support cup locking portion 1C and the opening 6B.

A cylindrical portion 6C is formed on the periphery of the opening 6B. The position of the end face of the cylindrical part 6C is on the pipe connecting part 1A side from the end face of the support cup locking part 1C, and the end of the cylindrical part 6C is between the pipe connecting part 1A of the main body 1 and the support cup locking part 1C. It is located in the vicinity of the constricted portion 1D. After making cuts at several locations at the base of the cylindrical part 6C, the upper part of the cut is pressed from the outer peripheral side toward the constricted part 1D, and the upper part of the notch is deformed toward the constricted part 1D to form the engaging part 6D. Thus, the engaging portion 6D and the constricted portion 1D are engaged, and the support cup 6 can be fixedly installed on the main body 1.

A base plate 6E having an opening similar to the opening 6B described above is installed inside the bottom surface of the support cup 6. A plurality of openings 6F are formed at equal intervals near the periphery of the bottom surface 6A of the support cup 6. The opening 6F extends from the bottom surface 6A to the side surface 6G of the support cup. A spiral groove 6H is formed on the end face side of the side surface 6G.

The cover plate 7 is composed of a thin plate-like lid 7A that covers the main body 1, the thermal decomposition unit 4 and the deflector 5 in the support cup 6, and a cylindrical retainer 7B. Since the cover plate 7 is connected to the support cup 6 after connecting the pipe connection portion 1A of the main body 1 to the fire extinguishing equipment pipe, the cover plate 7 is assembled as a separate component from the main body 1 and the support cup 6 described above.

The lid 7A has a disk shape and is made of copper or copper alloy which easily propagates heat. The retainer 7B is cylindrical, and the ends of a plurality of legs hanging from the lower end are bent to form a connection surface 7C with the lid 7A. The connecting surface 7C and the lid 7A are joined by a low melting point alloy 7D. As the low melting point alloy 7D, an alloy having a melting point lower than that of the low melting point alloy 16 in the cylinder 14 is used.

A protrusion 7E that can be screwed into the spiral groove 6H of the support cup 6 is formed on the peripheral surface of the retainer 7B. The protrusion 7E is formed so that the peripheral surface of the retainer 7B is cut and the protrusion 7E protrudes obliquely downward. The protrusion 7E functions as a stopper. When the retainer 7B is pulled downward when it is screwed with the spiral groove 6H of the support cup 6, the protrusion 7E is caught by the spiral groove 6H and is prevented from coming off.

Conversely, when the retainer 7B is fitted into the support cup 6, the protrusion 7E can elastically deform on the spiral groove 6H and pass over the spiral groove 6H. Therefore, when the retainer 7 </ b> B is fitted into the support cup 6, the retainer 7 </ b> B can be installed by a one-push operation for pushing the retainer 7 </ b> B into the support cup 6.

Then, the assembly procedure and construction procedure of the sprinkler head of this invention are demonstrated.

First, the valve body 3 is fitted into the step portion 2H from the end of the frame portion 2 of the main body 1. Subsequently, the saddle 20 to which the compression screw 21 is screwed is put into the frame portion 2.

4 is inserted into the frame 2 so that the lever 11 is engaged with the position of the recess 20A of the saddle 20. At that time, the lever 11 is inserted into the frame portion 2 through the lever insertion groove 2D of the inner flange 2C, and after the tip of the lever 11 is inserted deeper than the inner flange 2C, the thermal decomposition portion 4 is rotated. The recess 20A and the lever 11 are engaged. Furthermore, the thermal decomposition part 4 is rotated, and the position of the lever 11 is set at a position rotated approximately 90 ° from the lever insertion groove 2D.

Subsequently, a tool such as a wrench capable of rotating the compression screw 21 or a screwdriver is inserted through the through-hole of the set screw 17 of the thermal decomposition unit 4, and the compression screw 21 is screwed into the female screw 20B. Then, the tip of the compression screw 21 presses the valve body 3 and the tip of the lever 11 presses the inner flange 2C to elastically deform the inner flange 2C. By tightening the compression screw 21 with a predetermined torque, the load with which the valve body 3 presses the discharge port 1B can be controlled within a predetermined range. In this way, after all the components such as the valve body 3 are inserted into the frame portion 2, the assembly work is completed by inserting a tool into the through hole and screwing the compression screw 21 into the female screw 20B. Work can be done easily.

Next, the deflector 5 is installed in the main body 1. After the guide pin 5C is inserted through the hole 5E formed in the deflector locking portion 2G of the main body 1, the end of the guide pin 5C and the hole 5B of the deflector 5 are fixed by caulking.

Subsequently, the support cup 6 is installed on the main body 1. In a state where the support cup locking portion 1C of the main body 1 and the cylindrical portion 6C of the support cup 6 are fitted together, cuts are made at several locations at the base of the cylindrical portion 6C. Thereafter, when the upper part of the cut is pressed from the outer peripheral side of the cylindrical part 6C toward the constricted part 1D, the upper part of the cut is deformed along the outer peripheral shape of the constricted part 1D to form the engaging part 6D. The engagement portion 6D and the constricted portion 1D are engaged, and the support cup 6 is fixed to the main body 1. This completes the assembly procedure of the sprinkler head as a product.

The cover plate 7 is connected to the support cup 6 after the above products are connected to the piping and the ceiling board W is constructed (state of FIG. 9). The cover plate 7 is installed by connecting the protrusion 7E of the cover plate 7 to the spiral groove 6H of the support cup 6 by screwing.

At this time, the distance between the connection port of the fire-extinguishing equipment pipe and the ceiling surface may be different for each connection port of the fire-extinguishing equipment pipe in terms of design and construction. In such a case, by adjusting the insertion length of the retainer 7B with respect to the support cup 6, it can be installed corresponding to the distance between each connection port and the ceiling surface.

For example, in FIG. 1, the retainer 7 </ b> B is inserted deepest into the support cup 6, but the insertion length of the retainer 7 </ b> B is made shallower when the distance between the pipe connection port and the ceiling surface is greater than in FIG. 1. do it.

In this case, in this embodiment, the deflector locking part 2G is provided on the opening end side of the frame part 2 as close as possible to the ceiling surface, and the movement range of the deflector 5 is large. For this reason, even if the insertion length of the retainer 7B is shallow and the deflector 5 is placed on the back surface of the cover plate 7 at a position lower than that of FIG. That is, it is possible to make a large installation adjustment margin for the construction of the conshielded sprinkler head A, and the construction becomes easy.

This completes the assembly and construction of the sprinkler head shown in FIG.

  Next, the operation and effect of the sprinkler head A of the present invention will be described.

The frame portion 2 is formed with an outer peripheral surface protruding outward from the pipe connecting portion 1A, and a beam-like portion 2J (inward) where the lever 11 of the thermal decomposition portion 4 is locked at a position opposed to the outer peripheral surface. Since the flange 2C) and the opening 2E lacking the outer peripheral surface from the pipe connecting portion 1A side to the beam-like portion 2J are provided, the frame portion 2 can be significantly reduced in weight. Therefore, it is possible to reduce the load acting on the fire extinguishing equipment piping, and it is possible to reduce the burden caused by the weight load during transportation and installation work on the fire extinguishing equipment piping.

Since the beam-like portions 2J are formed at positions facing each other in the frame portion 2, the pressing load of the lever 11 of the thermal decomposition portion 4 can be equally applied to both the beam-like portions 2J. The spring force due to 2J deflection can be evenly exhibited. For this reason, the thermal decomposition part 4 can be continuously hold | maintained stably over many years. Further, the uniform spring force due to the deflection of each beam-like portion 2J can cause the component parts to be splashed in the axial direction of the frame portion at the time of the decomposition operation of the thermal decomposition portion 4, and can function to prevent lodgement.

The frame part 2 is formed with an open end into which the thermal decomposition part 4 can be inserted. Therefore, since the thermal decomposition part 4 can be inserted from the opening end of the frame part 2, the thermal decomposition part 4 can be easily incorporated. Moreover, since the thermal decomposition part 4 of this embodiment is a unit component, it is not necessary to assemble the thermal decomposition part 4 while being incorporated in the frame part 2, and the assembly work can be simplified.

The opening 2E of the frame portion 2 is provided at an inward position on the center axis side of the frame portion 2 with respect to the outer peripheral surface of the beam-like portion 2J. By doing so, it is possible to form the opening 2E simultaneously with the cutting of the inner peripheral surface of the beam-like portion 2J. Therefore, the manufacturing cost of forming the opening 2E and providing the beam-like portion 2J can be reduced without depending on a dedicated process for forming the opening 2E.

In the present embodiment, since the pipe connection portion 1A and the frame portion 2 are forged processed bodies, the number of parts can be reduced compared to the case where they are separate parts, and the cost can be reduced. It is.

Since the lever insertion groove 2D for inserting the lever 11 of the thermal decomposition part 4 is formed in the inner flange 2C of the frame part 2, the inner flange 2C is obstructed when the thermal decomposition part 4 is inserted into the frame part 2. It can be easily inserted with good workability.
And the thermal decomposition part 4 makes the lever 11 latch with respect to the inner flange 2C by rotating the lever 11 around the axis of the frame part 2 after inserting the lever 11 into the lever insertion groove 2D. For this reason, an assembling operation can be easily performed.

In the present embodiment, a deflector 5 is provided outside the opening end of the frame portion 2. For this reason, the deflector 5 and the disk D can be easily configured as separate products by attaching various shapes according to the specifications and applications of the sprinkler head. In other words, the components before the installation of the deflector 5 can be used in common for various products, and simply by installing the deflector 5 and the disk D according to the specifications and applications of the desired sprinkler head. Products with different specifications can be made.

As a modification of the present invention, as shown in FIG. 12, the shape of the disk can be a non-circular shape. Specifically, there are an elliptical shape shown in FIG. 12A, a star shape shown in FIG. 12B, and a rectangular shape shown in FIG. These shapes are difficult to cut, but can be easily formed by pressing.

Further, as another embodiment of the slit 5A in which only the upper surface of the deflector shown in FIG. 13A is recessed as the slit shape of the deflector 5, it is inclined toward the lower surface side of the deflector 5 toward the edge as shown in FIG. In the same figure (c), it is inclined to the upper surface side of the deflector 5 as it goes to the edge, in the same figure (d), the slit is recessed from the disk D side to the middle part, and from the middle part. The edge of the deflector 5 may be cut out.

As a modified example other than the above, it is also possible to intentionally install the disk D at a position deviated from the center of the deflector 5, whereby the water discharged from the nozzle can be sprayed only in a specific direction. A plurality of disks D can be installed on the deflector 5.

In the present embodiment, the deflector locking portion 2G is provided at an outer position of the lever insertion groove 2D on the outer peripheral surface of the frame portion 2. By doing so, since the position of the lever 11 of the thermal decomposition part 4 and the deflector locking part 2G are separated from each other, the lodgement during the decomposition operation of the thermal decomposition part 4 can be effectively prevented. That is, the lever insertion groove 2D is located on the inner peripheral surface of the frame portion 2 provided with the deflector locking portion 2G on the outer peripheral surface. For this reason, the lever 11 of the thermal decomposition part 4 cannot be locked at the position of the inner peripheral surface of the deflector locking part 2G. Therefore, the lever 11 must be locked with respect to the inner flange 2C located at a position away from the deflector locking portion 2G. Thus, when the sprinkler head A is operated, the thermal decomposition unit 4 is decomposed and the lever 11 can be prevented from colliding with the guide pin 5C when the lever 11 is scattered and dropped. Can be prevented.

A Sprinkler head 1 Body
1A Piping connection
1B Water outlet 2 Frame part
2B Plane portion 2C Inner flange 2D Lever insertion groove 2E Opening (opening)
2F Lever engaging part 2G Deflector engaging part 2H Step part 2J Beam-like part 3 Valve body
4 Thermal decomposition part
5 Deflector
5A slit
6 Support cup
7 Cover plate 7
11 Lever
12 Support plate
13 Balancer
14 cylinders
15 Plunger
16, 32 Low melting point alloy
17 Set screw
20 saddles
21 compression screw
D disc
D1 leg

Claims (3)

One end of the main body is connected to the water supply pipe, and a nozzle is installed inside.The other end supports a valve that closes the normal nozzle, and a thermal decomposing unit that operates in the event of a fire is installed. In the sprinkler head provided with a deflector locking portion that can be installed at the tip of the deflector that scatters water discharged from the nozzle in all directions on the outer periphery,
A sprinkler head, characterized in that a disk is installed on the surface of the deflector on the nozzle side, the disk has a leg at the edge, and the leg is installed through a hole on the deflector.
The sprinkler head according to claim 1, wherein the tip of the leg of the disk penetrating the deflector is bent.
The sprinkler head according to claim 1 or 2, wherein the cross-sectional shape of the disk is non-circular.

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