JPH08141106A - Sprinkler head - Google Patents

Abstract

PURPOSE: To provide a multiple type sprinkler head in which it is miniaturized, especially its outside diameter has been reduced for enhancing the novelity in design, and also the installation thereof between the T-bars of the system ceiling can be enabled, and further the sprinkling function directly downward has been enhanced. CONSTITUTION: A sprinkler head is provided with a body 1 which has a discharge port 5 in its central part and which is provided with a piping connection screw part 2 on its upper part, a valve element 20 for closing the discharge port 5 of this body 1, and a frame 10 which is formed in a bottomed cylindrical shape having nearly the same diameter as the threaded part 2 of the body 1, and which has a plurality of sprinkling ports 15 on the lower part of its circumferential wall and also has an opening on its bottom, and which is provided with a flange part 12 on the upper side wall of the sprinkling ports 15 and is connected to the lower part of the body 1. Further, the sprinkler head is provided with legs inclined in the direction of the dissolving part and has a pair of arms 41a, 41b for locking the flange part 12 of the frame 10 and for supporting the valve element 20, and also is provided with a link part 40 which is dissolved at the time of occurrence of a fire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head for extinguishing a fire by sprinkling it with water.

[0002]

2. Description of the Related Art A multi-type sprinkler head, which is one of sprinkler heads, has a multi-frame in which a deflector and a frame supporting the deflector are integrated, and is suitable for a place with a strong air velocity and a strong fire. However, it has the feature of being able to spray fire-extinguishing water with a large particle size.

A conventional multi-type sprinkler head generally has a frame having a large number of water spouts and an opening at the center of the lower end of a frame with an inverted cross section. As it falls, the opening of the frame is closed by the lowered valve element to spray fire extinguishing water from the water spout.

For this reason, there is a problem that the water distribution to the lower side is inferior, and several inventions have been proposed to solve this (for example, Japanese Utility Model Publication No. 52-89898 and Japanese Patent Publication No. 55-23623). Gazette). The above-mentioned actual development 5
According to the invention described in Japanese Patent No. 2-89898, a water spray hole is provided in an internal water spray plate which is integrally formed with a push plate (valve body) that closes an opening at the time of fire, and water is sprayed downward from the water spray hole. The invention described in JP-B-55-23623 discloses an intermediate position in which the water passage opening is opened and the water stopcock does not close the central water spouting opening when the fusible link is dropped during a fire. It is designed to be held at.

[0005]

In the conventional multi-type sprinkler head as described above, the bottom area of the frame is increased and the opening is provided there to improve the downward water distribution. The frame inevitably has a large diameter (usually 50 to 60 mm), which makes it unpleasant when installed on the ceiling, which is annoying. Also, recently, the ceiling of a building is often a so-called system ceiling, but the sprinkler head having a large frame as described above cannot be installed between the T-bars of such a system ceiling.

The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the size of the system, in particular to reduce its outer diameter to improve the design and to install the system between T-bars of the system ceiling. The purpose is to obtain a sprinkler head with an improved sprinkling function directly below.

[0007]

The sprinkler head according to the present invention is constructed as follows. (1) A main body having a water outlet in the center and a threaded portion for pipe connection provided in the upper part, a valve body that closes the water outlet of the main body, and a bottomed member having a diameter substantially the same as the threaded portion of the body It is formed in a cylindrical shape, has a plurality of water spouts in the lower part of the peripheral wall, has an opening in the bottom part, and a frame provided with a flange part on the upper inner wall of the water spout and connected to the lower part of the main body, and a slope in the disassembly direction It has a pair of arms that support the valve body by being locked to the flange portion of the frame, and a link portion that is disassembled when a fire occurs.

In the sprinkler head of the above (1), (2) the water spout is provided so as to communicate with the lower portion of the peripheral wall of the frame and the peripheral edge of the bottom, and (3) or the opening provided in the bottom of the frame is almost formed. It is formed in an oval shape, the major axis side of which is longer than the outer diameter of the bottom surface of the valve body and the minor axis side of which is shorter than the outer diameter of the bottom surface of the valve body.

(4) Further, it has a U-shaped arm guide which is integrally fixed to the lower end of the valve body and accommodates the link part therein. When the link part is disassembled, the arm guide is attached to the bottom part of the frame. It is designed such that it drops from the provided opening and at least a part of the opening is closed by the valve body. (5) In the sprinkler head of the above (4), a balancer having a substantially U-shaped cross-section whose side wall is formed in an inverted triangular shape is interposed between the arm guide and the arm of the link portion.

(6) A main body having a water discharge port closed at the center by a valve body and a threaded portion for pipe connection provided at the upper part, and a frame having a water sprinkling port connected to the lower part of the main body In a sprinkler head having a link part that is housed in a frame and disassembles in the event of a fire, the frame is formed into a cylindrical shape with a bottom, has a flange part that slightly protrudes on the inner wall, and has a plurality of flange parts from the bottom to the bottom. The water sprinkling port is provided, and further, the bottom part is provided with an opening portion that is covered and closed by most of the valve body when the valve body descends.

[0011]

[Action]

(1) Since the arm of the link portion is provided with the leg portion inclined in the disassembling direction, the cylinder can be arranged between the leg portions even if the distance between the arms is narrowed. Therefore, the width of the link portion can be reduced, and as a result, the outer diameter of the frame can be reduced. Then, when a fire occurs, the link portion is disassembled and falls from the opening portion of the frame, and at the same time, the valve body opens the water outlet to close the opening portion of the frame and sprays fire extinguishing water from the water spouting opening of the frame. (2) Since the water spouts are opened to communicate with the lower part of the peripheral wall of the frame and the outer peripheral part of the bottom, the fire extinguishing water is sprinkled radially from the water spouts of the frame and also downward.

(3) Since the major axis side of the substantially oval opening provided on the bottom of the frame is longer than the outer diameter of the bottom surface of the valve body and the minor axis side is made short, a fire occurs and the valve is closed. Even if the body closes the opening of the frame, a gap is created at both ends of the opening on the long axis side. Therefore, the fire extinguishing water is sprinkled downward from this gap, so that the downward sprinkling efficiency can be improved.

(4) Since the U-shaped arm guide for accommodating the link portion inside is integrally fixed to the lower surface of the valve body,
When the link part is disassembled and falls from the opening part of the frame during a fire, the arm guide surely descends along the side edge of the opening part, and the opening part is closed by the valve body integrated with this. (5) By interposing a balancer having an inverted triangular side wall between the arm guide and the link arm,
The balance between the two is maintained at all times, and when a fire occurs, the flexure facilitates the disassembly of the link part and the drop of the valve disc.

(6) The frame is formed into a cylindrical shape with a bottom, has a flange portion that slightly protrudes on the inner wall, is provided with a plurality of water spray ports from the bottom of the flange portion to the bottom portion, and further has a valve body at the bottom portion. Since an opening was provided that was large and did not allow the valve element to fall, when a fire occurred and the link part was disassembled, the valve element descends and closes the opening of the frame, but there is a gap between the opening and the valve element. Since there is a gap, the fire extinguishing water is sprinkled in all directions from the sprinkling port of the frame and also downward from the gap in the opening.

[0015]

【Example】

Embodiment 1 FIG. 1 is a vertical sectional view of a first embodiment of the present invention, FIG. 2 is a bottom view showing a state in which a protective cover is removed, FIG. 3 is a front view showing the appearance of this embodiment, and FIG. FIG. 5 is a bottom view and FIG. 5 is an exploded perspective view of FIG.

In the figure, reference numeral 1 denotes a main body, and as shown in FIG. 6, a first screw portion 2 provided with a screw on the outer periphery thereof, and a hexagonal flange portion integrally provided on the lower end portion thereof. Three
And a second screw portion 4 integrally formed with the collar portion 3 with a screw provided on the outer periphery, and the first portion is provided in the center portion.
The water discharge port 5 is provided by penetrating the screw part 2, the flange part 3 and the second screw part 4. Further, a lower portion of the water discharge port 5 is enlarged to form a recess 6 for accommodating a valve body described later, and a valve seat 7 is provided between the water discharge port 5 and the recess 6. The brim 3 is not limited to a hexagon,
For example, a locking portion which is formed in a circular shape and which is locked by the tightening tool may be provided.

Reference numeral 10 denotes a bottomed cylindrical frame (outer diameter of 22 to 23 mm) having a diameter substantially the same as that of the screw portion 2 of the main body 1.
As shown in FIG.
A female screw 11 that is screwed into the
The flange portion 12 is formed below (slightly below the central portion in the height direction). Reference numeral 15 denotes a water spout, which is formed between the flange portion 12 and the bottom portion 14 in a radial pattern and at equal intervals.
It opens in the peripheral wall 13 and the peripheral portion of the bottom portion 14. Reference numeral 16 denotes a substantially oval-shaped opening provided on the bottom 14 and having both ends on the major axis side formed in an arc shape. The flange portion 12 is
Do not prevent the valve body 20 from falling when the link part is disassembled.
The necessary minimum width is such that the tips of the heads 42 of the arms 41a and 41b described later can be locked.

Reference numeral 20 denotes a valve body for opening and closing the water discharge port 5 of the main body 1. As shown in FIG. 8, a valve body 21 having a smaller diameter than the water discharge port 5 and inserted into the water discharge port 5, and a larger diameter than the valve body 21. And a flange portion 22 accommodated in the recess 6 and the flange portion 2
2 and a protrusion 23 provided in the center of the lower surface of the protrusion 2.
And a caulking piece 24 concentrically provided on the outer periphery of the. 25 is made of a metal material such as copper,
It is a packing that covers the upper portion of the valve body 20.

Reference numeral 30 denotes an arm guide formed by bending a single metal plate, and as shown in FIG.
1 and plate-shaped side walls 32a and 32b whose both long side edges are bent downward are formed into a substantially U-shape with both sides open. By bending not the short side of the substrate 31 but the long side thereof, the opening portion is reduced. Further, both side edges of the side walls 32a and 32b are formed on the frame 1
The arm guide 30 is bent to the side of the substrate 31 in order to correspond to the shape of the oval-shaped opening 16 of the arm guide 30 in case of fire.
The fall guide function is enhanced. In addition, a cutout portion 33a for increasing heat transfer efficiency to a fusible alloy, which will be described later, and for not hindering the elevation of the arm support plate,
33b is provided. The caulking piece 24 of the valve body 20 is fitted into the hole 34 provided at the center of the base plate 31 and caulked, so that the valve body 20 and the arm guide 30 are integrally coupled.

Here, the length L of the opening 16 provided in the bottom portion 14 of the frame 10 is longer than the diameter D of the flange portion 22 of the valve body 20, and the width W is shorter than the diameter D. Further, the length L ₁ of the substrate 31 of the arm guide 30 depends on the opening 1
6 shorter than the length L of the width W ₁ is slightly narrower than the width W of the opening 16, Furthermore, the length of the substrate 31 L ₁
Is approximately equal to the diameter D of the flange portion 22 of the valve body 20, and the width W
₁ is formed smaller than the diameter D.

Reference numeral 35 denotes a substantially U-shaped balancer made of, for example, a metal material (spring material) having a thickness of 1 mm, and when a sprinkler head is assembled, a predetermined assembly load applied to the valve body 20 is applied to a link portion 40 which will be described later. The arms 41a and 41b are evenly applied, and the assembly load is adjusted to a predetermined value by bending to some extent. As shown in FIG. 10, the balancer 35 includes a substantially rectangular substrate 36 whose both ends on the major axis side are formed in a gentle arc shape, and a substrate 3
The long-axis side edges of 6 are bent at substantially right angles inside both ends of the substrate 36, and four leg parts 38a, 38a, 38b, 38b are formed at each end part, and the leg parts are formed. Between 38a and 38a and 38b and 38b, inverted triangular side walls 37a and 37b are formed so that their tops are located substantially in the center of the length of the substrate 36. A fulcrum receiving recess 39 is provided. The height of the side walls 37a and 37b is equal to that of the leg portion 38.
The height is set to be equal to or lower than the height of a and 38b, and specifically, it is set to a required height in consideration of various conditions. Then, the legs 38a, 38b of the balancer 35.
Are formed at positions facing leg portions 43 of arms 41a and 41b, which will be described later, when the sprinkler head is assembled. The width between the leg portions 38a and 38b of the balancer 35 is formed so that it can be loosely fitted between the side walls 32a and 32b of the arm guide 30.

Reference numeral 40 denotes a link portion, as shown in FIG.
It is composed of a pair of arms 41a and 41b, an arm support plate 46, a link holding plate 50, and the like. Arms 41a, 41b
As shown in FIG. 12, a head 42 which is bent in the generally arcuate outwardly wider is formed from the head 42, the angle theta ₁ (carried outward (disassembly direction of link portion 40) in the middle In the example, the legs 43 are bent at (θ ₁ = 5 °) and are inclined to form a substantially inverted J-shape.
Locking holes 44 and second locking holes 45 are provided.
The lower surface of the first locking hole 44 is formed as a downward slope at an angle θ ₂ (θ ₂ = 20 ° in the embodiment) from the outside to the inside, and the head 42 (leg 43). The upper part) is formed with a width that allows loose fitting between the side walls 37a and 37b of the balancer 35. In addition, the lower surface of the first locking hole 44 may be formed in a stepped shape having a higher outer side and a lower inner side, instead of the downward slope facing from the outer side to the inner side.

Reference numeral 46 denotes an arm support plate, which has two linear sides,
A main body 47 which is formed in a substantially rectangular shape by two sides of which both ends are formed in an arc shape, and has a through hole 48 in the center thereof;
It is composed of locking pieces 49a and 49b which are provided so as to project slightly downward from two straight sides and whose tip portions are bent obliquely downward. The locking pieces 49a and 49b are arms 41a and 4b.
It is locked in the first locking hole 44 of 1b. Reference numeral 50 is a link holding plate, which is a rectangular main body 51 having a screw hole 52 at the center.
And locking portions 53a and 53b projecting from both sides thereof, the locking portions 53a and 53b are locked in the second locking holes 45 of the arms 41a and 41b.

Reference numeral 55 denotes a cylinder, which is provided with a flange portion 56 at a substantially central portion of the outer wall in the height direction, and a screw portion 57 is provided on a lower surface thereof so as to project. The cylinder 55 is inserted into the through hole 4 of the arm support plate 46 until the collar portion 56 abuts.
8 is loosely fitted and placed on the main body 47. Reference numeral 58 is a fusible alloy made of, for example, compression solder, which is housed in the cylinder 55, 59 is a first piston slidably housed in the cylinder 55, and 60 is a screw portion provided at one end of the link holding plate 50. It is a second piston that is screwed into the screw hole 52 and has the other end abutting the first piston 59.

Reference numeral 61 denotes a protective cover which also serves as a heat sensitive plate made of a metal material having a high thermal conductivity. As shown in FIG. 13, the protective cover is formed into a substantially bottomed cylindrical shape having an open upper part, and is outside the opening. The diameter is selected to be approximately equal to the outer diameter of the frame 10. Reference numeral 62 denotes a convex portion formed in the central portion of the bottom portion, a through hole 63 is provided in the central portion thereof, and one or a plurality of cutout portions 64 are provided in the peripheral edge thereof.

Reference numeral 65 is a lock nut for attaching the protective cover 61 to the screw portion 57 of the link portion 40, and an enlarged view thereof is shown in FIG. The lock nut 65 has a thickness substantially equal to the depth of the convex portion 62 of the protective cover 61, and the head 66 accommodated in the convex portion 62 and the through hole 63 of the protective cover 61.
And a screw portion 68 having a diameter smaller than that of the crimp portion 67 and having a female screw 69.

In the lock nut 65 as described above, the caulked portion 67 is inserted into the through hole 63 of the protective cover 61, and the head portion 66 is housed in the convex portion 62. In this state, the caulking part 67 is pressed or hit from the inside of the protective cover 61 to caulk, and the lock nut 65 is integrally fixed to the protective cover 61. At this time, a part of the caulked portion 67 bites into the notch portion 64 provided in the through hole 63 to prevent the lock nut 65 from rotating. The protective cover 61 configured as described above is fixed by covering the lower surface of the link portion 40 by screwing the lock nut 65 into the screw portion 57 of the cylinder 55. The protective cover 61 may be extended so that the upper end thereof covers the water spout 15 of the frame 10.

Next, an example of the assembling order of the present embodiment, which comprises the above-mentioned respective parts, will be described. The link unit 40 is
It shall be assembled in advance in the state shown in FIG. First, the main body 1 is made to stand upright with the first screw portion 2 downward, and the valve main body 21 of the valve body 20 to which the packing 25 is attached and fixed to the arm guide 30 is inserted into the water discharge port 5 to The flange 22 is attached to the valve seat 7 via the packing 25.
Contact. Then, the side wall 32 of the arm guide 30
The balancer 35 is inserted between a and 32b, and the fulcrum receiving recess 39 is brought into contact with the protrusion 23 of the valve body 20.

In this state, the side wall 32 of the arm guide 30
The link portion 40 is inserted between a and 32b, and the arm 41
The heads 42 of a and 41b are respectively positioned in the openings of the arm guides 30 and abutted on both ends of the lower surface of the balancer 35. Then, the female screw 11 of the frame 10 is screwed into the second screw portion 4 of the main body 1 so as to cover the arm guide 30 and the link portion 40 from below, and both are integrally coupled.

At this time, the arms 41a of the link portion 40,
The tip portion of the head portion 42 of 41b is locked to the flange portion 12 provided on the inner wall of the frame 10, and the head portion 42 is pressed down by the balancer 35 when the frame 10 is screwed in, resulting in the arms 41a and 41b. A rotational force in the outward opening direction (a direction away from the cylinder 55) is applied with the engaging portion to the flange portion 12 as a fulcrum, and this rotational force is applied to the arm 41.
It is regulated by an arm support plate 46 that is locked to a and 41b. At this time, the assembly load applied to the arms 41a and 41b is usually about 90 kgf.

The lower part of the link portion 40 (almost the arm 4
(1a, 41b downward from the first locking hole 44) is exposed to the outside from the opening 16 provided in the bottom 14 of the frame 10, and the side walls 32a, 32b of the arm guide 30.
The lower end portion of the cutting portion 33 is located substantially in the same plane as the lower surface of the opening portion 16 or below the lower surface and is in sliding contact with both edge portions.
a and 33b face the cylinder 55. Finally, the lock nut 65 of the protective cover 61 is screwed and fixed to the threaded portion 57 of the cylinder 55 to complete the assembly of the sprinkler head.

As shown in FIG. 15, the sprinkler head configured as described above is inserted through a hole 71 provided in the ceiling 70, and the first screw portion 2 is screwed into the water supply pipe 72, so that the ceiling surface is Part of it (about half of the total length) is exposed from the ceiling surface. Reference numeral 73 is a sealing plate that closes the hole 71. Moreover, since the outer diameter of the frame 10 is small (about 22 to 23 mm), the frame 10 can be installed between the T-bars of the system ceiling.
In this case, for example, the water supply pipe 72 connected to the universal joint
The first screw part 2 of the main body 1 is screwed into the
2 may be moved to expose the lower part or the whole of the frame 10 to the room from between the T bars, and the water supply pipe 72 may be fixed.

Now, when a fire occurs and the protective cover 61 also serving as a heat sensitive plate is heated, and the fusible alloy 58 is heated and begins to melt by the heat and the hot airflow from the surroundings, the melted fusible alloy 58 is melted. Since a part of the cylinder 55 flows out from between the cylinder 55 and the first piston 59, the cylinder 55 and the arm support plate 46 fixed to the cylinder 55 are attached to the side wall 3 of the arm guide 30.
2a, 32b rises inside the cutout portions 33a, 33b, and both arms 41a, 41b or at least one arm 41a
(Or 41b) pivots outward with the engagement portion with the flange portion 12 of the frame 10 serving as a fulcrum. As a result, the arms 41a, 41b or one arm 41a (or 41b)
First locking hole 44 and locking piece 49 of arm support plate 46
The engagement with a and 49b (or one of them) is released, and the link portion 40 is disassembled. As a result, the link portion 40 including the protective cover 61 and the balancer 35 are, as shown in FIG.
It falls outside through an opening 16 provided in the bottom 14 of the frame 10.

At the same time, the arm guide 30 integrated with the valve body 20 has its side wall 32a, due to its own weight and the water pressure of the fire extinguishing water.
32b descends along both side edges of the opening 16 of the frame 10, and the flange 22 of the valve body 20 is seated on the bottom 14 of the frame 10 to close the opening 16. As a result, the water discharge port 5 is opened, and the fire extinguishing water is sprayed from the water spray port 15 through the frame 10 as shown in FIG. At this time, a part of the fire extinguishing water is generated from the bottom portion 14 of the frame 10 and the valve body 2.
When it hits 0, it jumps up, hits the lower surface of the flange portion 12, and is sprayed in the direction directly below. As shown in the drawing, if the lower end of the flange portion 12 is cut off obliquely, it is possible to enhance the distribution of water spray diagonally downward.

By the way, the outer diameter of the flange portion 22 of the valve body 20 is larger than the width W of the opening 16 of the frame 10 on the minor axis side, but smaller than the length L on the major axis side thereof. Since the opening 16 cannot be completely closed by the valve body 20, as shown in FIG. 17, the flange 22 of the valve body 20 (the substrate 31 of the arm guide 30) and both ends of the opening 16 on the major axis side. There is a gap g between the parts. For this reason, the fire extinguishing water is also sprayed downward from this gap g,
Combined with the water spray from the water spray port 15, water is sprayed substantially uniformly on all sides and below the sprinkler head. Therefore,
Unlike the conventional multi-type sprinkler head, it is not necessary to provide a long slit, and the frame 10 can be made thinner and smaller than the conventional one.

The arm guide 30 is formed by bending both sides of the long side of the substrate 31 downward to form plate-like side walls 32a and 32b.
And an opening is provided between the opposite edges of the side walls 32a and 32b to form a substantially U-shape, and the heads 42 of the arms 41a and 41b of the link part 40 inserted between the side walls 32a and 32b. Position the balancer 35 in this opening.
Since it is brought into contact with, the periphery of the link portion 40 is surrounded and protected by the side walls 32a and 32b of the arm guide 30 and the arms 41a and 41b. Therefore, it is difficult for dust and the like to enter the inside, and even if a rod or the like is inserted from the water spouting port 15, the side walls 32a and 32b or the arms 41a and 4 are provided.
Since it does not enter the inside of the arm guide 30 by hitting 1b, the fall of the arm guide 30 in the event of a fire is not hindered. Therefore, in the event of a fire, it can operate normally and sprinkle fire extinguishing water.

Embodiment 2 FIG. 18 is a vertical sectional view of a second embodiment of the present invention. In the present embodiment, the screw portion 57 of the cylinder 55 is formed to be long in the first embodiment, and a protective cover 61 also serving as a heat sensitive plate is attached to the screw portion 57, and one or two sheets are provided on the protective cover 61. The heat sensitive plates 63a and 63b as described above (two cases are shown in the figure) are provided. According to the present embodiment configured as described above, the same effect as that of the first embodiment is obtained, and the heat transfer to the fusible alloy 58 is further promoted, and the sensitivity can be improved.

The frame 10 of the sprinkler head according to this embodiment has the arms 41a, 41 of the link portion 40 on the inner wall.
b has a flange portion 12 to be locked, and for example, a part of a bottomed cylindrical semi-finished product manufactured by die casting is cut by machining to form the flange portion 12 and the sprinkler port 15 at the same time. Therefore, it is easy to manufacture and has a large mechanical strength. Further, since the flange portion 12 is provided at the minimum necessary position capable of accommodating the valve body 20, the balancer 35, a part of the link portion 40 and the like on the upper portion thereof, the opening portion 16 of the frame 10 is provided.
The projecting length of the link portion 40 and the like from the can be shortened, so that a short sprinkler head can be obtained.

In the present embodiment constructed as described above, since the lower portions of the arms 41a and 41b of the link portion 40 are inclined outward, even if the distance between the arms 41a and 41b is narrowed, the leg portion 43 is formed. , 43 can be held in such a width that the cylinder 50 can be inserted. Therefore, the width of the link portion 40 can be reduced, and the outer diameter of the frame 10 into which the link portion 40 is incorporated can be reduced. Further, since the arms 41a and 41b are simply provided with the locking holes 44 and 45 for the arm support plate 46 and the link holding plate 50, the mechanical strength does not decrease.

Further, a locking piece 49 of the arm support plate 46.
Since the lower surface of the first locking hole 44 for locking the a and 49b is formed as a downward slope facing from the outside to the inside, the locking pieces 49a and 49b of the arm support plate 46 have the first locking holes 49a and 49b when the fire occurs.
It is possible to reduce friction when it is disengaged from the locking hole 44, and the link portion 40 can be smoothly and surely disassembled.

In the balancer 35, both edge portions of the substrate 36 are bent substantially at right angles, and leg portions 38a, 3 are provided at both end portions, respectively.
Since 8b is provided and side walls 37a and 37b of substantially inverted triangle shape are provided between the leg portions 38a and 38b, that is, the side wall of the inverted triangle has the highest height in the central portion where the stress generated in the balancer 35 is maximum. Since the portions are reinforced, the bending moment stress applied to the central portion in the length direction can be made substantially uniform over the entire length. For this reason, since the strength is high and there is no risk of deformation even when a large load is applied, and a sufficient amount of deflection is obtained, the disassembled link portion 40 can be reliably ejected and dropped when a fire occurs. Furthermore, four legs 38a, 38
b is the arms 41a, 41 of the link portion 40 that abut on the lower surface.
It also serves as a guide for b, and can prevent rotation and rattling of the arms 41a and 41b.

In the above description, the case where the second threaded portion 4 of the main body 1 is formed with a male thread and the frame 10 is provided with the female thread 11 to be connected, the second threaded portion 4 is used as the female thread. Alternatively, the frame 10 may be provided with a screw to connect the both. Further, the structure of each portion is not limited to the above embodiment, and can be appropriately changed without departing from the scope of the present invention.

[0043]

As described above in detail, the present invention can obtain the following effects. (1) The sprinkler head according to the present invention has a main body having a water discharge port in the center and a threaded portion for connecting a pipe in the upper part, a valve body for closing the water discharge port of the main body, and a screw of the main body. It is formed into a bottomed cylindrical shape with almost the same diameter as the part, has a plurality of water spouts in the lower part of the peripheral wall and an opening in the bottom part, and a flange part is provided on the upper inner wall of the water spout and is connected to the lower part of the main body. It has a small diameter (22 mm) because it is composed of a frame that has a pair of arms that support the valve body by being locked to the flange part of the frame that has legs that are inclined in the disassembling direction and that disassembles in the event of a fire. It is possible to realize a compact frame (about ~ 23 mm), which is small and has a small outer diameter (about half the outer diameter of the conventional sprinkler head), and the exposed length of the link part from the frame is short. It looks like it has excellent design You can get a sprinkler head.

Further, the lower portions of the arms of the link portion into which the cylinder or the like is inserted are each inclined outward to narrow the gap between the arms, and the upper end of the arm portion of the link portion is attached to the upper surface of the flange portion of the frame. Since the outer surface of the upper end of the arm is brought into contact with or close to the inner wall of the frame, the inner diameter of the frame can be made almost equal to the width of the link part (distance between arms). The outer diameter of the frame can be reduced (22 to 23 mm in the embodiment). Further, as a result, the frame can be installed between the narrow T-bars of the system ceiling, so there is no need to provide a mounting hole for the sprinkler head in the ceiling or hide the hole with a sealing plate.

(2) In the sprinkler head of the above (1), since the sprinkler ports which communicate with the lower portion of the peripheral wall of the frame and the peripheral portion of the bottom portion are provided, the sprinkling function in the direct downward direction is improved, and the sprinkler head in the peripheral and downward directions is improved. The watering distribution can be averaged.

(3) In the sprinkler head of the above (1), the opening provided at the bottom of the frame is formed into a substantially oval shape, the major axis side of which is longer than the outer diameter of the bottom surface of the valve body, and the minor axis side of the opening. Since it was formed smaller than the outer diameter of the bottom surface of the valve body, when the link part is disassembled and falls due to fire, the valve body also descends and sits on the bottom of the frame to close the opening,
Since a gap is created between the long axis side of the opening and the valve body, water is sprayed directly downward from this gap. For this reason, the sprinkling function in the direct downward direction is further improved in combination with the sprinkling from the sprinkling port, and the sprinkling distribution in the surroundings and downward can be made uniform.

(4) In the sprinkler head of the above (1), since the U-shaped arm guide for accommodating the link portion inside is fixed integrally with the valve body, it is possible to prevent dust and the like from entering the link portion. Further, when the link portion is disassembled, the arm guide descends along the opening portion of the frame, so that at least a part of the opening portion can be reliably closed by the valve body.

(5) In the sprinkler head of (1) above, since a balancer having a substantially U-shaped cross section whose side wall is formed in an inverted triangle shape is interposed between the arm guide and the link portion, a large bending moment can be obtained. It can withstand, there is no risk of deformation, and since it has an appropriate amount of bending, the link part and the like can be reliably bounced out in the event of a fire.

(6) The frame is formed into a cylindrical shape with a bottom, a flange portion slightly protruding from the inner wall is provided, and a plurality of water sprinklers are provided from the lower portion of the flange portion to the bottom portion. Further, when the valve body descends, Since an opening that covers most of the valve body and is closed is provided, the overall size is small and the design can be improved. It can be mounted between the T-bars of the system ceiling, and water can be sprinkled directly above and below it. The function can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a bottom view of FIG. 1 excluding a protective cover.

3 is an external view of FIG.

FIG. 4 is a bottom view of FIG.

5 is an exploded perspective view of FIG. 1. FIG.

6A is a sectional view of the main body of FIG. 1, and FIG. 6B is a bottom view.

7A is a front view of the frame of FIG. 1, FIG. 7B is a bottom view, and FIG. 7C is a longitudinal sectional view.

8A is a cross-sectional view of the valve body of FIG. 1, and FIG. 8B is a bottom view.

9 (a) is a cross-sectional view of the arm guide of FIG. 1, (b).
Is a bottom view.

10A is a bottom view of the balancer shown in FIG. 1, and FIG. 10B is a sectional view thereof.

11 is an exploded perspective view of the link portion of FIG.

12A is a cross-sectional view of the arm of FIG. 11, and FIG. 12B is a side view.

13A is a plan view of the protective cover of FIG. 1, FIG.
Is a sectional view thereof.

14 is a cross-sectional view of the lock nut of FIG.

FIG. 15 is an explanatory view of the operation of the first embodiment.

FIG. 16 is an explanatory diagram showing a sprinkling state of the first embodiment.

FIG. 17 is a bottom view of FIG.

FIG. 18 is a cross-sectional view of the second embodiment of the present invention.

[Explanation of symbols]

 1 Main body 2 1st screw part 4 2nd screw part 5 Water discharge port 10 Frame 11 Female screw 12 Flange part 14 Bottom part 15 Sprinkling port 16 Opening part 20 Valve body 25 Packing 30 Arm guide 32a, 32b Side wall 35 Balancer 40 Link part 41a, 41b Arm 42 Head 43 Leg 46 Arm support plate 50 Link retainer plate 55 Cylinder 58 Soluble alloy 59 First piston 60 Second piston 61 Protective cover 65 Lock nut

Claims (6)

[Claims] 1. A sprinkler head, which has a water spouting port in a frame and sprinkles fire extinguishing water from the water spouting port in the event of a fire, has a water spouting port in the center and a threaded portion for connecting a pipe is provided in an upper part. A main body, a valve body for closing a water outlet of the main body, and a bottomed cylindrical shape having substantially the same diameter as the threaded portion of the main body,
Has a plurality of water spouts at the bottom of the peripheral wall and an opening at the bottom,
A frame is provided on the inner wall of the upper portion of the water spout to be connected to the lower portion of the main body, and a leg portion inclined in the disassembling direction is provided. The frame is engaged with the flange portion to support the valve element. A sprinkler head having a pair of arms and a link portion that is disassembled in the event of a fire. 2. The sprinkler head according to claim 1, wherein the sprinkler port is provided so as to communicate with the lower portion of the peripheral wall of the frame and the peripheral portion of the bottom portion. 3. An opening provided at the bottom of the frame is formed into a substantially oval shape, the major axis side of which is longer than the outer diameter of the bottom surface of the valve body, and the minor axis side of which is shorter than the outer diameter of the bottom surface of the valve body. The sprinkler head according to claim 1, wherein the sprinkler head is formed as described above. 4. A U-shaped arm guide that is integrally fixed to the lower end of the valve body and that accommodates the link portion therein, and the arm guide is provided at the bottom of the frame when the link portion is disassembled. The sprinkler head according to claim 1, wherein the sprinkler head falls along the opening, and at least a part of the opening is closed by the valve body. 5. The sprinkler head according to claim 5, wherein a balancer having a side wall formed in an inverted triangle shape and having a substantially U-shaped cross section is interposed between the arm guide and the arm of the link portion. 6. A main body having a water discharge port closed at the center by a valve body and having a threaded portion for connecting a pipe provided at an upper portion thereof,
A frame having a water spout and connected to the lower part of the main body;
In a sprinkler head having a link part which is housed in the frame and disassembles in the event of a fire, the frame is formed into a cylindrical shape with a bottom, has a flange part slightly protruding on the inner wall, and from the lower part of the flange part A sprinkler head, wherein a plurality of water sprinkling ports are provided to a bottom portion, and further, an opening portion is provided at the bottom portion so as to be covered and closed by most of the valve body when the valve body descends.