JP2014193408A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To alleviate a weight load applied on extinguishment facility piping by reducing the weight of a sprinkler head, and to alleviate a load caused by the weight load at installation work to the extinguishment facility piping at transportation.SOLUTION: A sprinkler head A comprises a piping connecting part 1A and frame part 2. In the frame part 2, an external peripheral face protruding to the outside of the piping connecting part 1A is formed, and in an opposing position at the external peripheral face, there are formed a beam-shaped part 2J (inner flange 2C) to which a lever 11 of a thermosensitive decomposition part 4 is locked, and an opening 2E which cuts off the external peripheral face from a side of the piping connecting part 1A up to the beam-shaped part 2J. By this constitution, the frame part 2 can be largely reduced in weight, and accordingly, a weight load applied to extinguishment facility piping for installing a plurality of the sprinkler heads A can be reduced. Furthermore, a load caused by the weight load at installation work to the extinguishment facility piping can be reduced at transportation.

Description

The present invention relates to a fire extinguishing sprinkler head.

The sprinkler head is installed on a ceiling surface or a wall surface in a building, has a nozzle that can be connected to a pipe connected to a water supply source at one end, and a heat-sensitive operation unit at the other end. During normal times, the heat-sensitive operating part supports a valve body that closes the nozzle.

A sprinkler head shown in FIG. 13 is known as a conventional sprinkler head (Patent Document 1). The sprinkler head 50 has a structure in which the pipe connecting portion 51 and the frame 52 are screwed together with screws 51A. When the pipe connection portion 51 and the frame 52 are screwed together, the lever 55 and the saddle S locked to the inner flange 52A at the lower end of the frame 52 are displaced in the direction of the pipe connection portion 51, and the displaced saddle S The nozzle body 53 is closed when the valve body 54 that has received pressure from the nozzle 54 comes into close contact with the nozzle edge 53.

In addition, a slit-shaped opening 52B is formed in the upper part of the inner flange 52A to which the lever 55 is locked. By forming the opening 52B, a beam-like portion 52C is formed on the frame 52 below the opening 52B, and the above-described inner flange 52A formed of a step portion is formed on the inner peripheral surface thereof. When the lever 55 is engaged with the inner flange 52A and a load is applied in a direction opposite to the opening 52B (downward in the figure), the beam-like portion 52C is deflected to obtain a spring property. That is, when the pipe connection portion 51 and the frame 52 are screwed together, the beam portion 52C is deflected by the lever 55 disposed at the lower portion of the opening 52B, and the deflection becomes a spring force. This spring force has the action of splashing the components of the thermal decomposition unit 57 to the outside of the sprinkler head 50 when the sprinkler head 50 is operated, and the lodgement (the component of the thermal decomposition unit 57 is clogged during decomposition). It is useful for prevention.

JP-A-7-284545 Shoko 56-49636

The sprinkler head 50 as described above is required to be reduced in weight because the pipe connection portion 51 and the frame 52 are forged parts and increase in weight. That is, a large number of sprinkler heads 50 are usually installed in fire extinguishing equipment piping laid on the ceiling or the like. Therefore, if the individual sprinkler head 50 is heavy, the weight of the fire extinguishing equipment piping as a whole will also increase, and many support fittings must be used to support the weight, resulting in an increase in the overall equipment cost. There is. In addition, metal pipes have been mainly used as fire extinguishing equipment pipes so far, but in recent years, they are cheap and light in place of metal pipes, and the header construction method (refer to Japanese Patent Laid-Open No. 10-52512 as an example of this construction method). Resin pipes with good workability are also being used. For this reason, in order to reduce the weight load acting on the resin pipe over a long period of time, it is desirable to reduce the weight of each sprinkler head 50 connected to the resin pipe.

The present invention has been made against the background of the prior art as described above. The purpose is to reduce the weight of the sprinkler head.

In order to achieve the above object, the present invention provides the following sprinkler head.

The present invention has one end side communicating with a fire extinguishing equipment pipe, a pipe connecting portion having a water outlet on the other end side, a tubular frame portion having one end side communicating with the water outlet and an open end on the other end side, For a sprinkler head comprising a thermal decomposition part having a lever that holds a pressing force of a valve body that closes the water discharge port and a reaction force of the pressing force acts, the frame part protrudes outward of the pipe connection part. An outer peripheral surface, and a beam-like portion that the lever locks at an opposing position on the outer peripheral surface, and an opening that lacks the outer peripheral surface from the pipe connection portion side to the beam-like portion. Features.

The frame portion of the present invention has an outer peripheral surface that protrudes outward from the pipe connection portion, and a beam-like portion that the lever engages at a position facing the outer peripheral surface, and the outer peripheral surface is connected to the pipe. And an opening that is missing from the beam side to the beam side. For this reason, in this invention, a frame part can be reduced significantly in weight. Therefore, the load acting on the fire extinguishing equipment piping can be reduced, and the burden caused by the weight load during the transportation and installation work to the fire extinguishing equipment piping can be reduced.
In addition, since the beam-shaped portion is at the opposite position, the pressing load of the lever of the heat-sensitive decomposition portion can be applied to each beam-shaped portion evenly, and the spring force due to the deflection of each beam-shaped portion can be exhibited evenly. . For this reason, a thermal decomposition part can be continuously hold | maintained stably over many years. In addition, the uniform spring force due to the deflection of each beam-like portion can cause the component parts to be splashed in the axial direction of the frame portion during the disassembly operation of the thermal decomposition portion, and can function to prevent lodgement. In addition, you may form not only one set but the beam-shaped part and opening part which are formed in the above opposing positions.

In the present invention, the opening end of the frame part can be configured such that the thermal decomposition part can be inserted.
According to this, since the thermal decomposition part can be inserted from the opening end of the frame part, the thermal decomposition part can be easily incorporated into the inside of the frame part.
In this case, when the thermal decomposition part is a unit part, the thermal decomposition part as a unit part can be easily inserted from the opening end of the frame part, so that the assembly work can be simplified. .

In the present invention, the opening can be provided at an inward position on the center axis side of the frame portion with respect to the outer peripheral surface of the beam-like portion.
In order to form the slit-shaped opening 52B in the frame 52 of the prior art, not only the process of cutting the inner peripheral surface and the outer peripheral surface of the frame 52 but also a dedicated process involving complicated cutting by a large machining center is required. It is. However, if the opening 52B can be formed without depending on such a dedicated process, the manufacturing cost can be reduced for both the component itself and the sprinkler head 50 as a whole.
Therefore, in the present invention, the opening is provided at an inward position on the center axis side of the frame portion with respect to the outer peripheral surface of the beam-like portion. By doing so, it becomes possible to form the opening simultaneously with the cutting of the inner peripheral surface of the beam-like portion, and the opening is formed and the beam-like shape can be formed without depending on a dedicated process for forming the opening. The manufacturing cost for providing the portion can be reduced.

In the present invention, the pipe connecting portion and the frame portion can be a forged processed body having an integral structure.
According to this, compared with the case where a pipe connection part and a flame | frame part are separate parts, a number of parts can be reduced and it can aim at cost reduction.

In the present invention, the thermal decomposition section can be a unit component in which a plurality of components are combined.
According to the present invention, since it is not necessary to incorporate the components of the thermal decomposition part into the frame part one by one, the assembly process can be simplified and the production cost can be reduced. In addition, since it is a unit part, it is easy to handle during assembly.

In the present invention, a lever locking portion for locking with a lever of the thermal decomposition portion can be provided on the inner peripheral surface of the beam-shaped portion.
According to this, a thermal decomposition part can be incorporated in the inside of a frame part. In order to lock the thermal decomposition portion with respect to the lever locking portion, for example, when using a thermal decomposition portion including a link in which two thin plates are joined with a low melting point alloy and a pair of levers with which the link engages, The lever can be assembled by engaging one end of the lever with the lever engaging portion while engaging the other end with the link. Moreover, in the case of the thermal decomposition part as a unit part mentioned above, it is only necessary to lock the lever with respect to the lever locking part on the inner peripheral surface of the frame part, and it can be easily assembled.

In the present invention, a lever insertion groove for inserting the lever of the thermal decomposition portion can be provided inside the frame portion on the inner peripheral surface of the frame portion.
According to this, when inserting the thermal decomposition portion into the frame portion, the lever locking portion does not get in the way and can be easily inserted with good workability.
The thermal decomposition part can be configured to be inserted into the inside of the frame part by inserting the lever into the lever insertion groove, and to be engaged with the lever engaging part by rotating around the axis of the frame part. . According to this, if the thermal decomposition part is rotated, the lever is locked to the lever locking part, so that the assembly work can be easily performed.
The lever insertion groove as described above can be formed, for example, at a position rotated approximately 20 to 90 ° from the lever locking portion.

The said invention can provide a deflector on the outer side of the opening end of a flame | frame part.
According to this, it becomes possible to install a deflector of a shape according to the specifications and applications of the sprinkler head outside the frame, and various types of sprinkler heads with a common pipe connection part, frame part, and thermal decomposition part can be installed. Can be deployed. Further, according to the present invention, since the deflector is provided outside the frame portion, the sprinkler head can be reduced in weight by shortening the frame portion as compared with the structure in which the deflector is accommodated inside the frame portion as shown in Patent Document 2.

The said invention can provide the deflector latching | locking part which hold | maintains a deflector in the outer peripheral surface of a flame | frame part.
According to this, it becomes possible to install a deflector of a shape according to the specifications and applications of the sprinkler head outside the frame, and various types of sprinkler heads with a common pipe connection part, frame part, and thermal decomposition part can be installed. Can be deployed.

The present invention can include a guide pin that is attached to a deflector on one end side and that engages with a deflector locking portion provided on the frame portion on the other end side.
According to this, the deflector can be reliably operated with a simple structure using the guide pin.

The said invention can provide a deflector latching | locking part in the outward position of the lever insertion groove in the outer peripheral surface of a flame | frame part.
According to this, since the position of the lever of the thermal decomposition part and the deflector locking part are separated from each other, the lodgement during the decomposition operation of the thermal decomposition part can be effectively prevented. In other words, since there is a lever insertion groove on the inner peripheral surface of the frame portion provided with the deflector locking portion on the outer peripheral surface, the lever of the thermal decomposition portion cannot be locked. Therefore, the lever is locked with respect to the lever locking portion at a position away from the deflector locking portion. As a result, in the present invention, when the sprinkler head is operated, the heat-sensitive decomposition portion is disassembled and the lever can be prevented from colliding with the guide pin when the lever is scattered and dropped, thereby preventing a lodgement during the disassembly operation. be able to.

The said invention can provide a deflector latching | locking part in the opening end side of a frame part rather than a lever latching | locking part.
According to this, for example, the deflector locking portion can be configured as a frame yoke type sprinkler head that extends in the water discharge direction of the water discharge port and includes the deflector at the tip thereof. In this case, the deflector locking portion (arm) can be configured as a part of the frame portion, and the deflector locking portion (arm) can be configured as a separate member from the frame portion.
In the conshielded sprinkler head, parts other than the cover plate are placed behind the ceiling, and in the event of a fire, the deflector slides and protrudes from the bottom of the ceiling to sprinkle water. It is preferable to protrude the deflector from the ceiling lower surface as much as possible. In order to increase the amount of protrusion, the length of the guide pin holding the deflector may be increased, or the stroke of the guide pin may be increased, but there is a disadvantage that the manufacturing cost is increased. Therefore, as in the present invention, the deflector locking portion is provided closer to the opening end side of the frame portion than the lever locking portion, so that the deflector locking portion is positioned as close to the ceiling surface as possible so that the length of the guide pin and its stroke is increased. The projecting amount of the deflector from the ceiling surface can be increased without depending on the scale. And since the protrusion amount of the deflector from the ceiling surface, that is, the range of movement of the deflector can be increased, even if there is a construction difference in the distance between the connection port of the fire extinguishing equipment piping and the ceiling surface, it should be within the range of movement of the deflector. This can be absorbed, and the installation adjustment range in the construction of the conshielded sprinkler head can be expanded, and the construction becomes easy.

The present invention is installed between the valve body and the thermal decomposition part, and biases the valve body and the lever of the thermal decomposition part locked to the beam-like part in opposite directions, so that the valve body is A load generating member that generates a pressing load for stopping the water discharge port can be provided.
More specifically, the load generating member includes a compression screw that presses the valve body against the water discharge port, and a female screw that can be screwed to the compression screw, and the thermal decomposition portion is valved by screwing the compression screw to the female screw. A saddle that urges the body in a direction opposite to the direction of pressing against the water outlet and locks the lever of the thermal decomposition portion to the beam-like portion in a pressed state.
According to this, the valve body and the thermal decomposition part are urged in the separating direction by the screwing of the compression screw and the female screw of the saddle, and the pressing force against the water outlet of the valve body and the beam by the lever of the thermal decomposition part It is possible to cause deformation of the shape portion. With such a simple component configuration and a simple assembling operation, a load necessary for water-stopping of the valve body and bending deformation of the beam-like portion can be obtained.

In the present invention, a through hole is provided in the thermal decomposition part, and the screwing amount of the compression screw to the female screw of the saddle can be adjusted with a tool inserted into the through hole.
According to this, all the components such as the valve body are put inside the frame part, and then the assembly work is performed by adjusting the screwing amount of the compression screw with the tool inserted through the through hole of the thermal decomposition part. Since it is completed, the assembly work can be easily performed.

In the present invention, a main body composed of a pipe connection portion and a frame portion can be provided with a bottomed cylindrical support cup that accommodates the frame portion.
According to this, a conshielded sprinkler head embedded in the ceiling or a flush sprinkler head that normally keeps the deflector near the ceiling and protrudes from the ceiling to spray water during operation. Can do.

The said invention can be comprised as a main body and a support cup connected as a polygonal connection part.
According to this, it can connect firmly so that a main body and a support cup may not rotate.

The present invention can be configured to include a cover plate that is concealed so that the sprinkler head installed in the opening of the ceiling is not exposed to the outside, and a cylindrical retainer that holds the cover plate and holds the support cup.
According to this, it can be implemented as a conshielded sprinkler head that conceals the hole of the ceiling board through which the sprinkler head or the sprinkler head passes and hides it, and does not impair the aesthetics of the room.
Furthermore, the present invention can be configured such that a screwing groove is provided on the outer peripheral surface of the support cup, and a retainer is provided on the retainer to be screwed with the screwing groove. According to this, the support cup and the retainer can be easily connected by screwing.

The present invention includes a sealing plate that blinds between the outer peripheral surface of a sprinkler head installed in an opening of a ceiling and the edge of the opening, and a cylindrical retainer that holds the sealing plate and holds a support cup. Can be configured as
According to this, the sprinkler head or the hole in the ceiling board through which the sprinkler head passes can be hidden and made inconspicuous, and can be implemented as a flash type sprinkler head with a sealing plate that does not impair the aesthetics of the room.
Furthermore, the present invention can be configured such that a screwing groove is provided on the outer peripheral surface of the support cup, and a retainer is provided on the retainer to be screwed with the screwing groove. According to this, the support cup and the retainer can be easily connected by screwing.

The said invention can be comprised as what has an attaching part with respect to the outer peripheral surface of a flame | frame part in an upper end side, and equips the lower end side with the U-shaped cross section arm.
According to this, it can comprise as a frame type sprinkler head.

In the present invention, one end side communicates with the fire extinguishing equipment pipe, the other end side has a water pipe outlet, the one end side communicates with the water outlet, and the other end side has a cylindrical frame part. A heat-sensitive decomposing unit having a main body having a structure, a deflector installed outside the opening end of the frame unit, and a lever that holds a pressing force of a valve body that closes the water discharge port and a reaction force of the pressing force acts A sprinkler head having a beam-like portion that is constructed along the circumferential direction of the frame portion and that is locked by the lever, the tubular portion that covers the outside of the frame portion; A support cup having a bottom portion formed with an opening; and a support cup locking portion that revolves with the opening in the bottom portion of the support cup.
According to this, since a deflector is provided outside the frame portion, the sprinkler head can be reduced in weight by shortening the frame portion as compared with a structure in which the deflector is housed inside the frame portion as shown in Patent Document 2. In addition, a deflector having a shape according to the specifications and applications of the sprinkler head can be installed outside the frame, and various types of sprinkler heads with a common pipe connection part, frame part, and thermal decomposition part can be developed. Furthermore, by providing a support cup, various sprinkler heads such as a conshielded sprinkler head and a flash sprinkler head can be provided in the same manner as the present invention.

According to the sprinkler head of the present invention, since the sprinkler head can be reduced in weight, the weight load acting on the fire extinguishing equipment piping can be reduced. As a result, it is possible to contribute to weight reduction of the fire extinguishing equipment piping, and it is possible to reduce the equipment cost by reducing the use of the pipe support fittings. Moreover, aged deterioration of the resin pipe used instead of a metal pipe as fire extinguishing equipment piping can also be suppressed. Furthermore, the work burden due to the heavy load during installation on the fire extinguishing equipment piping during transportation can be reduced.

Sectional drawing of the sprinkler head of 1st Embodiment 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 Sectional view during construction of the sprinkler head of FIG. XX sectional view of FIG. Y part enlarged view of FIG. Sectional drawing of the sprinkler head of 2nd Embodiment Sectional drawing of the sprinkler head of 3rd Embodiment Sectional drawing of the sprinkler head by the modification of embodiment Cross section of conventional sprinkler head

1st Embodiment (FIGS. 1-9)
Hereinafter, a first embodiment of a sprinkler head according to the present invention will be described with reference to FIGS.

The sprinkler head A of 1st Embodiment is provided with the main body 1, the valve body 3, the thermal decomposition part 4, the deflector 5, the support cup 6, and the cover plate 7, and is comprised as a conshield type 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 15A is formed 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 can slide with the inner peripheral surface of the cylinder 14 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 slits 5A formed around it. 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.

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 1st Embodiment 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 product is connected to the piping and the ceiling board WC is constructed (state of FIG. 7). 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 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.

Thus, the assembly of the sprinkler head shown in FIG. 1 is completed.

Next, operations and effects of the sprinkler head A of the first embodiment 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 can be easily configured as a separate product by attaching various shapes according to the specifications and applications of the sprinkler head. That is, the components before the installation of the deflector 5 can be used in common for various products, and the specifications can be easily changed by installing the deflector 5 according to the specifications and applications of the desired sprinkler head. You can make a product. Further, the sprinkler head can be reduced in weight by making the frame portion shorter than the structure in which the deflector is housed inside the frame portion as shown in Patent Document 2.

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.

Second Embodiment (FIG. 10)
Next, a second embodiment of the present invention will be described with reference to FIG.

The sprinkler head B of the second embodiment shown in FIG. 10 is a flash type sprinkler head. In the second embodiment, parts having the same configurations as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

Differences between the second embodiment and the first embodiment will be described. In the second embodiment, the cover plate 7 of the first embodiment is replaced with a sealing plate 30. Similar to the cover plate 7, the sealing plate 30 has a retainer 7 </ b> B that can be connected to the spiral groove 6 </ b> H of the support cup 6. The lower end of the retainer 7B is expanded in a bowl shape, and a plate 31 is formed. The plate 31 has a function of covering the hole of the ceiling board WC.

In FIG. 10, the deflector 5 is exposed from the lower side (inside the room) of the ceiling board WC. The deflector 5 and the plate 31 may be subjected to a surface treatment such as painting according to the color of the ceiling board WC. In order to install the deflector 5 without protruding from the ceiling board WC, the guide pin 5C and the hole 5E of the deflector locking portion 2G are joined by the low melting point alloy 32. As the low melting point alloy 32, an alloy having a melting point lower than that of the low melting point alloy 16 used in the thermal decomposition portion 4 is used.

According to the sprinkler head B of the second embodiment, the same operations and effects as the sprinkler head A of the first embodiment can be achieved. Further, since the deflector 5 is installed without protruding from the ceiling board WC at all times, the sprinkler head can be installed without impairing the aesthetic appearance of the room.

Third Embodiment (FIG. 11)
Next, a third embodiment of the present invention will be described with reference to FIG.

The sprinkler head C of the third embodiment shown in FIG. 11 is a frame yoke type sprinkler head. In the third embodiment, parts having the same configurations as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

Differences between the third embodiment and the first embodiment will be described. In the third embodiment, arms 35, 35 as deflector locking portions are connected to the frame portion 2. The ends of the arms 35, 35 are connected on the extension of the water discharge port 1B, and a boss portion 36 protruding to the water discharge port 1B side is formed at the connection part. A plate-like deflector 37 is fixedly installed on the opposite side of the boss portion 36. Although not shown, the arms 35 and 35 are installed on the frame portion 2 by screwing, welding, brazing, or the like.

According to the third embodiment, it is possible to install the arm 35 in the frame portion 2 after the thermal decomposition unit 4 is incorporated into the main body 1, and to install the deflector 37 at the tip of the arm 35. By installing the deflector 37 having a shape according to the specification and application, it becomes possible to produce many kinds of products. Further, the arm 35 can be formed of a pin or a thin plate as long as the arm 35 has a strength capable of supporting the water flow discharged from the water discharge port 1B by the deflector 37. By configuring the arm 35 with a pin or a thin plate, the arm 35 can be configured not to obstruct the water flow discharged from the water outlet 1B.

Modification of each embodiment (FIG. 12)
For the thermal decomposition unit 4 of the first to third embodiments, instead of this, a thermal decomposition composed of a link obtained by joining two thin plates with a low melting point alloy and a pair of levers to which the link is engaged. Part can be used (see Japanese Patent Application Laid-Open No. 2008-154697). A modification of the first embodiment using such a thermal decomposition unit 36 is shown in FIG. The thermal decomposition portion 36 can be incorporated into the lever locking portion 2F of the frame portion 2 by engaging one end of the lever 37 with the inner flange 2C (lever locking portion 2F) and engaging the other end with the link 38. Is possible.

In the first embodiment, the compression screw 21 is screwed into the female screw 20B of the saddle 20 and then incorporated into the frame portion 2. However, the compression screw 21 is not screwed into the saddle 20 in advance. It is also possible to insert a compression screw 21 through a through-hole of the set screw 17 of the thermal decomposition unit 4 after inserting predetermined components into the part 2 and to engage with the female screw 20B of the saddle 20.

Although the arm 35 of the third embodiment is illustrated as a separate part from the frame part 2, it is also possible to use a part in which the arm part 35 is formed integrally with a part of the frame part 2.

A Sprinkler head (first embodiment)
B sprinkler head (second embodiment)
C sprinkler head (third embodiment)
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, 37 Deflector
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 30 Sealing plate
35 Arm (Deflector locking part)
36 Thermal decomposition part 37 Lever 38 Link

Claims (11)

One end side communicates with the fire extinguishing equipment piping, a pipe connection portion having a water outlet on the other end side, a main body having a cylindrical frame portion having one end side communicated with the water outlet and an open end on the other end side,
A deflector installed outside the open end of the frame part;
A thermal decomposition section having a lever that holds a pressing force of the valve body that closes the water outlet and a reaction force of the pressing force acts;
In the sprinkler head having a beam-shaped portion that is constructed along the circumferential direction of the frame portion and that is locked by the lever,
The body is
A support cup having a cylindrical part that covers the outside of the frame part, and a bottom part in which an opening is formed;
A sprinkler head, comprising: a support cup locking portion that engages with the opening of the bottom portion of the support cup so as to be able to rotate.   The sprinkler head according to claim 1, wherein the support cup locking portion is formed closer to the center axis of the main body than the outer periphery of the frame portion.   The sprinkler head according to claim 1 or 2, wherein the support cup locking portion has a polygonal outer peripheral portion.   The sprinkler head according to any one of claims 1 to 3, further comprising a cylindrical portion that engages with the support cup engaging portion at a peripheral edge of the opening of the bottom portion of the support cup.   The sprinkler head according to claim 4, further comprising an engaging portion obtained by deforming an upper portion of the cut formed in the cylindrical portion from the outer peripheral side toward the central axis side of the main body.   The sprinkler head according to any one of claims 1 to 5, wherein a plurality of openings are provided on a peripheral edge of the bottom portion of the support cup.   The sprinkler head according to claim 6, wherein an opening formed in a peripheral edge of the bottom portion of the support cup extends to a cylindrical portion.   The cover plate which is concealed so that the sprinkler head installed in the opening of the ceiling is not exposed to the outside, and the cylindrical retainer which holds the cover cup and holds the support cup. The sprinkler head described A deflector provided outside the open end of the frame portion;
A guide pin to which the deflector is attached to one end side;
The sprinkler head according to any one of claims 1 to 8, further comprising: a deflector locking portion that is provided in the frame portion and holds the guide pin movably along a cylinder axis direction of the frame portion.   The sprinkler head according to claim 9, wherein the guide pin has a space in which the guide pin can move between the support cup and the frame portion. The sprinkler head according to any one of claims 1 to 10, further comprising a base plate having an opening engageable with the support cup engaging portion between the support cup and the main body.

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