阅读说明：本技术 喷洒头 (Sprinkler head ) 是由 大越久誉 佐佐木义辉 渡边雄太 于 2019-01-08 设计创作，主要内容包括：本发明提供能够防止在侧壁型喷洒头动作时的堆积的喷洒头。本发明的喷洒头具有：主体(1),在内部具有与供水配管连接的喷嘴(12)；阀(3),在平时堵塞喷嘴(12)；一对框架(14),从主体(1)向喷嘴(12)的喷水方向延伸；主导流板(21),设置于框架(14)的顶端；热敏分解部(4),设置于阀(3)和主导流板(21)之间；以及辅助导流板(22),与通过喷嘴中心轴A和框架(14)的虚拟平面大致平行,并与该虚拟平面(B)分开设置。热敏分解部(4)使用通过低融点合金将多张薄板接合而成的连杆(41),还包括与连杆(41)卡合的支柱(42)和杆(43),将杆(43)相对于虚拟平面(B)配置于与设置有辅助导流板(22)的空间相反的空间。(The invention provides a sprinkler head capable of preventing accumulation when the side wall type sprinkler head acts. The sprinkler head of the present invention has: a main body (1) having a nozzle (12) connected to a water supply pipe therein; a valve (3) that normally closes the nozzle (12); a pair of frames (14) extending from the main body (1) in the water spraying direction of the nozzle (12); a main guide plate (21) arranged at the top end of the frame (14); a thermosensitive decomposition part (4) provided between the valve (3) and the main flow guide plate (21); and an auxiliary baffle plate (22) which is approximately parallel to a virtual plane passing through the nozzle central axis A and the frame (14) and is arranged apart from the virtual plane (B). The thermosensitive decomposition part (4) uses a connecting rod (41) formed by joining a plurality of thin plates through low-melting-point alloy, and further comprises a support column (42) and a rod (43) which are engaged with the connecting rod (41), and the rod (43) is arranged in a space opposite to a space provided with the auxiliary guide plate (22) relative to a virtual plane (B).)

1. A sprinkler head, comprising:

a main body having a nozzle connected to a water supply pipe therein;

a valve that normally blocks the nozzle;

a pair of frames extending from the main body in a water spraying direction of the nozzle;

the main flow guide plate is arranged at the top end of the frame;

a thermosensitive decomposition part disposed between the valve and the main flow guide plate; and

an auxiliary baffle plate substantially parallel to and spaced apart from a virtual plane passing through a central axis of the nozzle and the frame,

the thermosensitive decomposition unit includes a rod formed by joining a plurality of thin plates with a low-melting-point alloy, and a pillar and a rod engaged with the rod, and the rod is disposed in a space opposite to a space in which the auxiliary baffle is disposed with respect to the virtual plane.

2. The sprinkler head according to claim 1, wherein,

in a space opposite to the space where the auxiliary baffle is provided with respect to the virtual plane, a hook having a guide portion extending toward each frame is provided to the valve.

3. A sprinkler head, comprising:

a main body having a nozzle connected to a water supply pipe therein;

a valve that normally blocks the nozzle;

a pair of frames extending from the main body in a water spraying direction of the nozzle;

the main flow guide plate is arranged at the top end of the frame; and

a thermosensitive decomposition part disposed between the valve and the main flow guide plate,

hooks having guide portions extending toward the respective frames are provided to the valves,

the guide portion is disposed in a space defined by a center axis of the nozzle and a virtual plane of the frame.

4. The sprinkler head according to any one of claims 1 to 3, wherein,

the hook has an annular engaging portion that engages with an outer peripheral portion of the valve.

5. The sprinkler head according to any one of claims 1 to 3, wherein,

the hook is integrally formed with the valve.

6. The sprinkler head according to claim 4, wherein,

the clamping part is a C-shaped part with a part of gaps.

7. The sprinkler head according to any one of claims 1 to 6, wherein,

the hook has elasticity and is bent in a substantially W shape, both ends of the hook are engaged with the frame as the guide portions, and the valve is accommodated inside the bent engaging portion provided between the guide portions.

8. The sprinkler head according to any one of claims 1 to 7, wherein,

the valve is cylindrical with a bottom, a bottom surface side of the valve is accommodated in the nozzle, one end of the thermosensitive disassembly portion is engaged with an opening side of the valve, and the opening side is accommodated inside the engagement portion.

9. The sprinkler head according to any one of claims 3 to 8, wherein,

the thermosensitive decomposing part is a connecting rod formed by joining a plurality of thin plates through low-melting-point alloy, and comprises a support and a rod which are clamped with the connecting rod.

10. The sprinkler head according to any one of claims 3 to 9, wherein,

the guide portion is disposed in a space in which the rod is disposed, with the virtual plane as a boundary.

11. The sprinkler head according to any one of claims 3 to 10, wherein,

the guide portion has a plane extending in a direction away from the virtual plane.

Technical Field

The present invention relates to a sprinkler head for fire extinguishing.

Background

The sprinkler is installed in a building, senses heat of a fire and automatically operates to sprinkle water to extinguish the fire. The sprinkler head has a nozzle inside, the nozzle is connected to a pipe connected to a water supply source, and the nozzle is normally closed. When a fire occurs and the sprinkler head is operated by heat, the nozzle is opened to discharge water filled in the pipe from the nozzle. The sprinkler head has a guide plate for scattering water around on an extension line of an outlet of the nozzle, and the water colliding with the guide plate is dispersed in a predetermined range to suppress and extinguish a fire.

As an example of the structure of the sprinkler head, a frame type sprinkler head is provided. The frame type sprinkler head is provided with a horseshoe-shaped frame along a water spraying direction of a main body having a nozzle inside, and a guide plate which collides with water discharged from the nozzle to scatter the water around is provided at a tip of the frame.

A valve for normally closing the nozzle is provided between the nozzle and the deflector, and the valve is supported by the thermosensitive partition. As is well known, a glass valve or a low melting point alloy is used for the thermosensitive decomposition portion. When the thermosensitive decomposition part is operated by the heat of a fire, a phenomenon (accumulation) in which the structural members and valves of the thermosensitive decomposition part are retained in the baffle by the water flow of the nozzle occasionally occurs.

To prevent accumulation, there are sprinklers provided with springs that exert a force that directs the valve to a side that is offset from the direction of the water flow. (see, for example, patent document 1).

In addition, a side wall type sprinkler head (for example, see patent document 2) is provided with a baffle and an auxiliary baffle having a plane substantially parallel to a central axis of a nozzle. When the sprinkler head is operated, the structural member of the thermosensitive decomposition part and the valve are occasionally caught in the gap between the baffle and the auxiliary baffle to be accumulated.

Disclosure of Invention

Problems to be solved by the invention

Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a sprinkler head capable of preventing deposition when a sidewall type sprinkler head is operated.

Means for solving the problems

To achieve the above objects, the present invention provides the following sprinkler head.

That is, the sprinkler head of the present invention includes:

a main body having a nozzle connected to a water supply pipe therein; a valve that blocks the nozzle at ordinary times; a pair of frames extending from the main body to a water spraying direction of the nozzle; the main guide plate is arranged at the top end of the frame; a thermosensitive decomposing part disposed between the valve and the main flow guiding plate; and an auxiliary baffle plate which is approximately parallel to a virtual plane passing through the central axis of the nozzle and the frame and is arranged separately from the virtual plane, wherein the thermosensitive decomposition part uses a connecting rod formed by joining a plurality of sheets through low-melting-point alloy, and comprises a support column and a rod which are clamped with the connecting rod, and the rod is arranged in a space opposite to the space provided with the auxiliary baffle plate relative to the virtual plane.

If the heat-sensitive decomposition portion is disposed in a space opposite to the space where the auxiliary deflector is provided, the structure of the heat-sensitive decomposition portion is detached in a direction away from the virtual plane when the sprinkler head is operated, and the deposition can be prevented.

Further, hooks having guide portions extending toward the frames are provided in the valve in a space opposite to the space where the auxiliary baffle is provided with respect to the virtual plane. Thus, when the sprinkler head is operated, the valve is moved by the water flow discharged from the nozzle, and at this time, the hook is brought into collision with the frame, and can be detached in a direction away from the virtual plane. At this time, the valve moves in a direction away from the auxiliary baffle, and therefore, the valve can be prevented from accumulating in the gap between the main baffle and the auxiliary baffle.

The hook has an annular engaging portion that engages with the outer peripheral portion of the valve, and a guide portion that extends from the engaging portion toward the frame side. The guide portion is disposed to be close to or in contact with the frame. The hook can also be formed integrally with the valve. The engaging portion may be formed in a C-shape with a part of the notch.

The hook has elasticity, and both ends of the guide portion bent in a substantially W shape are engaged with the pair of frames, so that the valve body can be accommodated inside the engagement portion provided between both ends. Thus, the valve is separated in a direction away from the virtual plane by the elasticity of the hook when the sprinkler head is operated, and the accumulation can be prevented.

The above-described hook is applied not only to the side wall type sprinkler head but also to the up type and the down type sprinkler head. The sprinkler head has: a main body having a nozzle connected to a water supply pipe therein; a valve that normally blocks the nozzle; a pair of frames extending from the main body in a water spraying direction of the nozzle; the main flow guide plate is arranged at the top end of the frame; and a thermosensitive disassembling unit disposed between the valve and the main flow guide, wherein a hook having a guide portion extending toward each frame is disposed on the valve, and the guide portion is disposed at a position of a space having a virtual plane passing through a center axis of the nozzle and the frame as a boundary.

Effects of the invention

As described above, according to the present invention, when the side wall type sprinkler head is operated, the valve and the structural member of the thermosensitive decomposition portion can be prevented from being accumulated on the baffle plate.

Drawings

Fig. 1 is a plan view of a sprinkler head according to the present invention installed on a wall surface.

Fig. 2 is a perspective view of the sprinkler head of the present invention.

Fig. 3 is a front view of the sprinkler head of fig. 2.

Fig. 4 is a sectional view IV-IV of fig. 3.

Fig. 5 is an enlarged sectional view of the thermosensitive disassembled part.

Fig. 6(a) is a front view of the hook, and (b) is a cross-sectional view VI-VI shown in fig. 4.

Fig. 7(a) is a front view of the hook according to modification 1, and (b) is a cross-sectional view VI-VI of the hook according to modification 1.

Fig. 8(a) is a front view of a hook according to modification 2, and (b) is a cross-sectional view VI-VI of the hook according to modification 2.

Detailed Description

The sprinkler head S1 of the present invention is composed of a main body 1, a guide plate 2, a valve 3, a thermosensitive decomposition part 4 and a hook 5.

As shown in fig. 1, the sprinkler head S1 is a sidewall type sprinkler head and is installed on the wall W. The sprinkler head S1 has a rectangular protection area E in which water is uniformly spread.

The body 1 is hollow, and has an external screw 11 for connection to a pipe disposed near or inside a wall surface of a building and a nozzle 12 inside. Regarding the size of the nozzle 12, the value of the K factor derived from the flow rate of the nozzle 12 and the water spray pressure is in the range of 3 to 5.8, and in the present embodiment, the value of the K factor is 5.6. The male screw 11 connected to the pipe has a size of NPT1/2 or R1/2.

A substantially rectangular base 13 is provided near the outlet of the nozzle 12, and a pair of frames 14 extending from the base 13 in the water spraying direction of the nozzle 12 are provided. The frame 14 has: a linear portion 14A (first arm) extending substantially parallel to the central axis a of the nozzle; and an intersection portion 14B (second arm) connected from an end of the linear portion 14A to a boss 15 provided at the central axis a of the nozzle 12. As shown in fig. 5, the cross portion 14B is thinner than the linear portion 14A and has an elliptical cross-sectional shape.

The boss 15 is in a conical cylinder shape, the guide plate 2 is arranged at the top end of the boss, and the diameter D1 of the boss 15 on the side connected with the guide plate 2 is 9-10 mm. The outer peripheral diameter of the nozzle 12 side end of the boss 15 is smaller than the diameter D1 of the baffle 2 side. The outer peripheral end 15A of the boss 15 on the nozzle 12 side has a curved surface shape, and the radius of the curved surface is in the range of 1mm to 3mm, 2mm in the present embodiment.

The boss 15 is internally provided with a female screw 15B into which a pressing screw 16 is screwed. The tip 16A of the compression screw 16 is pointed and has a bevel 16B. The tip 16A faces the nozzle 12, and the angle α of the slope 16B is in the range of 80 ° to 100 °, in the present embodiment 90 °. The apex of the tip 16A is spherical, and preferably has a spherical radius of 2mm or less, in the present embodiment 1mm or less.

The pressure screw 16 has a function of pressing the valve 3 toward the nozzle 12 via the thermosensitive disassembly portion 4. In fig. 5, an extension 16C is close to or in contact with the curved surface of the outer peripheral end 15A of the boss 15, wherein the extension 16C follows the inclined surface 16B of the tip 16A of the compression screw 16, and when water flowing along the surface of the tip 16A passes through the outer peripheral end 15A, the water flow is not obstructed, thereby preventing the generation of turbulence. At this time, the distance a between the inclined surface 16B of the compression screw 16 and the end surface of the boss 15 on the nozzle 12 side is 2mm or less, and more preferably 1mm or less. If the interval is larger than the above range, the possibility of generating turbulence becomes high.

The baffle 2 shown in fig. 2 to 4 is composed of a main baffle 21 intersecting the central axis a of the nozzle, and an auxiliary baffle 22 provided in the vicinity of the main baffle 21. The main flow guide plate 21 is provided at the tip of the boss 15 and has a substantially circular disk shape. A plurality of slits 21A and projections 21B are formed on the periphery of the main flow guide plate 21.

The auxiliary baffle 22 is provided in the vicinity of the main baffle 21, and has a rectangular plane 22A substantially parallel to the central axis a of the nozzle. The auxiliary baffle 22 is disposed substantially parallel to a virtual plane B passing through the central axis a of the nozzle and the pair of frames 14 or disposed to be inclined upward by several degrees from the virtual plane B and is disposed apart from the virtual plane B.

The main airflow guide plate 21 is provided with an enlarged portion 21C longer than the projection 21B on the virtual plane B. The enlarged portion 21C is continuous with the bent portion 23 connected to the auxiliary baffle 22, thereby joining the main baffle 21 and the auxiliary baffle 22. As shown in fig. 4, the bent portion 23 is bent from the main flow guide plate 21 toward the nozzle 12 side. The plane 22A of the auxiliary baffle 22 intersects with an extension line of the plane of the main baffle 21, and a gap 24 for supplying water discharged from the nozzle 12 to the auxiliary baffle 22 is formed between the main baffle 21 and the auxiliary baffle 22.

In the figure, the water flow on the upper side of the virtual plane B collides with the main flow guide plate 21. The water flowing along the projection 21B is diffused so as to be separated from the central axis a of the nozzle, and is guided in the direction of the auxiliary baffle 22. The water reaches the auxiliary deflector 22 through the gap 24 and flows along the plane 22A, so that the water is distributed in the portion E1 of the protected area E, distant from the sprinkler head S1.

On the other hand, the water flow below the virtual plane B reaches the main flow guide plate 21, spreads in a direction away from the central axis a of the nozzle due to the fins 21C between the slits 21A and the slits 21A, and further spreads in the portion E2 near the sprinkler head S1 in the guard area E.

The valve 3 normally blocks the outlet of the nozzle 12. The valve 3 is composed of a valve cover 31, a disc 32, and a belleville spring 33. The valve cover 31 has a bottomed cylindrical shape, and one end side thereof is a spherical bottom portion 31A. The other end side is expanded in diameter and provided with a step 31B.

A disk-shaped disk 32 is mounted on the inner peripheral side of the step 31B. The disc 32 has a recess 32A at the center, and one end of the support 42 of the thermosensitive decomposition unit 3 engages with the recess 32A.

A belleville spring 33 is locked to the outer peripheral side of the step 31B. The belleville spring 33 is inserted through the bottom 31A of the bonnet 31. The surface of the disc spring 33 is covered with a fluorine resin. The outer peripheral edge of the belleville spring 33 is disposed at the outlet end of the nozzle 12, and when the pressing screw 16 is screwed into the female screw 15B of the boss 15, the belleville spring 33 is pressed and elastically deformed by the heat sensitive decomposition portion 4, and becomes a squashed shape. At this time, the fluororesin functions as a sealing material to seal the nozzle 12.

The thermosensitive disassembly section 4 is composed of a link 41, a stay 42, and a lever 43. The tie rod 41 is a heat-sensitive body that operates by the heat of a fire, and is configured by joining two thin metal plates 44 with a low-melting-point alloy. The low melting point alloy has a melting point of 60 to 200 ℃, and generally, a low melting point alloy having a melting point of 72 ℃ or 96 ℃ is used.

The two substantially rectangular metal plates 44 have a hole 45 at one end and an コ -shaped cutout 46 at the other end. The two metal plates 44 are joined by a low melting point alloy. At this time, the notch 46 of the other metal plate 44 is overlapped at the position of the hole 45 of the one metal plate 44. The post 42 and the lever 43 are inserted into two holes 45 of the joined link 41, respectively (see fig. 5).

The support column 42 is of a thin and long shape, and has one end engaged with the disk 32 of the valve 3 provided at the outlet of the nozzle 12 and the other end engaged with the tip end of the rod 43. As described above, the stay 42 is inserted through the hole 45 of the link 41. A projection 47 is provided in the middle of the strut 42, and the link 41 is locked to a groove 47A provided in the vicinity of the projection 47.

The lever 43 is formed by bending an elongated plate into a substantially L-shape. As described above, one end side of the lever 43 is inserted through the hole 45 of the link 41. The other end of the lever 43 engages with the support column 42, and the lever 43 is provided with a groove 48 that engages with the tip of the support column 42.

A recess 49 is provided on the surface on the rear side of the surface provided with the groove 48. The recess 49 is provided closer to the other end of the lever 43 than the groove 48. The compression screw 16 is in contact with the recess 49. When the tip end of the compression screw 16 presses the recess 49 of the lever 43, a force that rotates about the groove 48 of the locking stay 42 acts on the lever 43. However, one end side of the lever 43 is inserted through the hole 45 of the link 41, thereby preventing the rotation of the lever 43. Thereby, the link 41, the stay 42, and the lever 43 constituting the thermosensitive disassembly portion 4 maintain the engaged state. The pressure screw 16 presses and holds the valve 3 toward the nozzle 12 via the thermosensitive disassembly portion 4.

As shown in fig. 4, the thermosensitive decomposition unit 4 is disposed in a space opposite to the space where the auxiliary baffle 22 is provided with respect to the virtual plane B. In particular, since the lever 43 is largely displaced in the direction of pulling the link 41 apart when the sprinkler head S1 is operated, the lever 43 is disposed in a space opposite to the space where the auxiliary baffle 22 is disposed. Therefore, when the sprinkler head S1 is operated, the link 41, the stay 42, and the rod 43 are released in a direction away from the auxiliary baffle 22, and these members can prevent the accumulation of the gap 24 locked between the main baffle 21 and the auxiliary baffle 22.

In the sprinkler head S1 having the above configuration, the auxiliary baffle 22 is disposed on the ceiling side, and the thermosensitive decomposition portion 4 is disposed on the floor side. When the sprinkler head S1 is operated, the heat-sensitive decomposition portion 4 is decomposed, and at this time, the structural members of the heat-sensitive decomposition portion 4 are detached to the ground side by the water sprayed from the nozzle 12 and its own weight, and thus the structural members of the heat-sensitive decomposition portion 4 are moved in a direction away from the auxiliary deflector 22.

As shown in fig. 6, the hook 5 includes an engaging portion 51 formed in a ring shape and a guide portion 52 extending from the engaging portion 51 toward each frame 14. The bonnet 31 is accommodated inside the engaging portion 51. The inner peripheral diameter of the engaging portion 51 is substantially the same as the outer peripheral diameter of the valve cover 31 on the side where the disk 32 is provided, and the inner peripheral diameter of the engaging portion 51 is smaller than the outer peripheral diameter of the flange 34 provided at the opening end of the valve cover 31. The hook 5 is assembled to the bonnet 31 at a stage before the belleville spring 33 is inserted into the bonnet 31.

The end of the guide portion 52 is disposed in the vicinity of the frame 14 and is disposed in a space opposite to the space in which the auxiliary baffle 22 is disposed with respect to the virtual plane B. The guide portion 52 is disposed in a space on the side where the lever 4 is provided with respect to the virtual plane B. The distance L between both distal ends of the guide portion 52 is longer than the distance Lf between the pair of frames 14. When the sprinkler head S1 is actuated, the guide portion 52 moves along the frame 14, thereby acting so that the hook 5 and the valve 3 in the figure do not move upward of the frame 14. This prevents the valve 3 from being stuck to the gap 24 of the baffle 2.

Next, the operation of the sprinkler head S1 in the case of a fire will be described.

The sprinkler head S1 shown in fig. 1 is normally connected to a pipe and the male screw 11, which are not shown. The nozzle 12 is filled with pressurized water, but the nozzle 12 is closed by the valve 3 and the thermosensitive decomposition portion 4.

In a fire, when the low melting point alloy of the link 41 melts, the rod 43 rotates and the metal plate 44 engaged with the rod 43 is separated from the metal plate 44 engaged with the strut 42. Thereby, the engagement state of the thermosensitive disassembly section 4 is released, the engagement of the link 41, the support 42, and the lever 43 is disengaged, and the valve 3 supported by the support 42 is separated from the nozzle 12 and is detached, so that the nozzle 12 is opened.

At this time, the valve 3 and the hook 5 are moved by the water flow discharged from the nozzle 12, and the guide portion 52 moves while contacting or approaching the frame 14, and is discharged to the outside of the sprinkler head S1. Alternatively, the guide portion 52 is rebounded by the collision of the water force of the water flow with the frame 14, thereby being discharged to the outside of the sprinkler head S1.

The water discharged from the nozzle 12 collides with the main flow guide plate 21 to be spread toward the portion of E2 near the sprinkler head S1. In addition, the water reaching the auxiliary baffle 22 through the gap 24 flows along the plane 22A of the auxiliary baffle 22 to be accelerated and spread to a portion of E1 distant from the sprinkler head S1.

Fig. 7 shows a modification 1 of the above hook. The hook 6 of fig. 7 is made of a wire material having elasticity. The hook 6 is bent in a substantially W shape, and both ends 61, 61 of the hook 6 function as guide portions and engage with the pair of frames 14. In the intermediate portion, the valve 3 is accommodated inside the bent portion 62 functioning as an engagement portion. The curved portion 62 has an opening 63 through which the bonnet 31 can be inserted into the curved portion 62.

In a state before the hook 6 is assembled to the sprinkler head S1, the interval of the ends 61, 61 is wider than the interval of the pair of frames 14. In a state where the hook 6 is locked to the frame 14, the ends 61, 61 are in a state of pressing the frame 14.

The sequence of assembling the hook 6 to the sprinkler head S1 is: first, the valve 3 and the thermosensitive disassembly portion 4 are assembled to the body 1 of the sprinkler head S1; then, the hook 6 is locked to the frame 14, and the bonnet 31 is accommodated to the inside of the curved portion 62. The hook 6 is moved in the direction indicated by the arrow D in fig. 7 b (the direction perpendicular to the central axis a of the nozzle) so that the opening 63 faces the support 42 by passing the hook 6 between the link 41 and the valve 3. The ends 61, 61 interfere with the frame 14, the ends 61, 61 elastically deform so as to approach each other, and the opening 63 of the bent portion 62 is enlarged.

When the hook 6 is moved in the direction of arrow D, the bonnet 31 is accommodated in the curved portion 62 through the opening 63. In this state, when the hook 6 is released, both ends 61, 61 of the hook 6 are locked with the frame 14, and the bonnet 31 is held inside the bent portion 62, thereby completing the attachment of the hook 6 to the sprinkler head S1.

Since the hook 6 is biased in the direction opposite to the direction indicated by the arrow D by the end 61, when the sprinkler head S1 is operated, the water flow discharged from the nozzle 12 flows the hook 6 in the direction away from the frame 14 in a state where the hook 6 holds the valve 3 inside the curved portion 62, and is discharged to the outside of the sprinkler head S1.

Fig. 8 shows a modification 2 of the hook as another modification of the hook. The hook 7 of fig. 8 has an engagement portion 51 formed in a ring shape similar to the hook 5 of fig. 6. The inner peripheral diameter of the engaging portion 51 is substantially the same as the outer peripheral diameter of the valve cover 31 on the side where the disk 32 is provided, and the inner peripheral diameter of the engaging portion 51 is smaller than the outer peripheral diameter of the flange 34 provided at the opening end of the valve cover 31. The hook 5 is assembled to the bonnet 31 at a stage before the belleville spring 33 is inserted into the bonnet 31.

The guide portions 72 are formed to extend from the engagement portions 51 toward the respective frames 14. The end of the guide portion 72 is disposed in the vicinity of the frame 14 and in a space opposite to the space where the auxiliary baffle 22 is disposed with respect to the virtual plane B. The guide portion 52 is disposed in a space on the side where the lever 43 is provided with respect to the virtual plane B. The guide portion 72 has a flat surface 72a, and the flat surface 72a has a shape extending in a direction away from the virtual plane B. By the plane 72a, when the sprinkler head S1 is operated, the plane 72a receives the water current discharged from the nozzle to move in parallel with the frame 14. The plane 72a collides with the intersection portion 14B of the frame 14 to be discharged to a direction (downward in the drawing) away from the virtual plane B.

The embodiments of the present invention have been described above, and the other configurations and operations will be described below.

The guide portion 52 of the hook 5 and the bonnet 31 as described above can be integrally configured. Further, although the engaging portion 51 is annular, if a cutout portion is provided in which a portion between the broken lines 53 and 53 shown in fig. 6(a) is removed, the hook 5 can be provided to the valve 3 at a stage after the valve 3 and the thermal decomposition portion 4 are assembled to the sprinkler head S1.

In the above-described embodiments, the side wall type sprinkler head was used for description, but the present invention is not limited thereto, and the hook of the present invention can be applied to a downward type sprinkler head and an upward type sprinkler head.

Description of the reference numerals:

1 main body

2 flow guiding plate

3 valve

4 thermosensitive decomposing part

5.6, 7 pothook

12 nozzle

14 frame

15 boss

21 main flow guide plate

Slit 21A

21B projection

21C enlargement part

21D fin

22 auxiliary deflector

23 bending part

24 gap

31 valve cover

32 disc

33 belleville spring

41 connecting rod

42 support

43 rod

51 engaging part

52. 72 guide part

End 61

62 bending part

Central axis of nozzle A

B virtual plane