JPH08173569A - Flush type sprinkler head - Google Patents

Abstract

PURPOSE: To provide a flush type sprinkler head, which is surely actuated and is easily manufactured, and to reduce an outside diameter of the flush type sprinkler head. CONSTITUTION: A flush type sprinkler head is constructed of a cylindrical frame 10 connected to a main body 1, a bottomed decomposing part, supporting cylinder 31 which is arranged inside the frame 10 slidably and projects its lower part from the lower end of the frame 10, a thermosensible decomposing part, 65 which is arranged on the bottom part, inside the decomposing part, supporting cylinder 31 so as to prevent the decomposing part, supporting cylinder 31 from being released from the frame 10 in the ordinary case and is provided with a fusible metal 66 melting in the case of a fire, and a lock ball 71 which holds the thermosensible decomposing part, 65 in the position closing a water discharging port. 2 in the ordinary case and is arranged in a ball insertion hole arranged in the decomposing part supporting cylinder 31. The thermosensible decomposing part, 65 consists of a thermosensible part 40 provided with thermosensible plates 42a, 42b, fusible alloy which is stored in the thermosensible part 40 and is pressurized by means of a decomposing part presser 56 via a piston 68, and a coil spring 64 which is arranged in the lower part, of a spring member 47 and energizes the decomposing part, presser 56 downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash type sprinkler head in which a deflector descends to a predetermined position and sprays water during operation.

[0002]

2. Description of the Related Art As an example of a conventional flash type sprinkler head, there is a device disclosed in Japanese Utility Model Publication No. 5-38758. This invention has a water discharge port for discharging fire extinguishing water in the center of the head body, a cylindrical frame is screwed to the brim of the head body, and a cap is pressed against the water discharge port to seal the fire extinguishing water. A thermosensitive decomposition part and a deflector mounted on the lower end of a guide rod having a stopper ring attached to the upper part thereof are provided in a cylindrical frame.

When a fire occurs, the fusible alloy provided in the heat-sensitive decomposition portion is melted, the heat-sensitive decomposition portion is decomposed, and falls through the long hole provided in the deflector to the outside. As a result, the cap and arm guide fall due to their own weight and water pressure of the fire extinguishing water, and at the same time the stopper ring also falls and sits on the bottom of the cylindrical frame, so the deflector connected to the stopper ring by the guide rod also descends, and the arm guide and arm guide The cap sits on this deflector. As a result, the water discharge port is opened, and the fire extinguishing water is sprayed through the water discharge port against the blades of the deflector.

[0004]

The flash type sprinkler head as described above is highly reliable because of its reliable operation during a fire, and has been well received. By the way, recently, the ceiling of a building is often a so-called system ceiling, but the system ceiling is formed with a narrow width between T-bars (25
Since the sprinkler head as described above uses a pair of inverted J-shaped levers, it is impossible to make the inner diameter of the frame smaller than the width of the arms arranged opposite to each other. There was a limit to miniaturization. For this reason,
It was not possible to arrange the sprinkler head as described above between the T-bars and connect it to the water supply pipe arranged behind the ceiling.

The present invention has been made to solve the above-mentioned problems, and the outer diameter can be greatly reduced, and the operation is reliable and the manufacture is easy, and the flash is excellent in design. The purpose is to obtain a mold sprinkler head.

[0006]

[Means for Solving the Problems]

(1) The flash-type sprinkler head according to the present invention has a cylindrical frame coupled to a main body having a water discharge port, and slidably disposed in the frame, and the lower part thereof is slightly from the lower end part of the frame. A protruding bottomed cylindrical disassembling part support cylinder, and disposed in the disassembling part support cylinder and at the bottom thereof,
A heat-sensitive decomposition section that normally prevents the disassembly section support cylinder from coming off the frame and separates the disassembly section support tube from the frame in the event of a fire, and a step formed in the disassembly section support tube at approximately the center of the disassembly section support tube. Of the balancer having a spring member disposed in the portion, a disk-shaped balancer having an outer diameter substantially equal to the inner diameter of the decomposition portion support cylinder disposed on the spring member, and a valve body closing the water outlet. The heat-sensitive decomposition part is provided with a deflector disposed above the lock ball and the disassembly part support cylinder is provided with a lock ball, and the disassembly part support cylinder is slidably provided with a lock ball. The heat-dissipating part retainer that holds the ball in a state that part of it protrudes into the ball hole provided in the frame, and the heat-sensitive part that has the heat-sensitive plate and that protrudes from the bottom of the disassembly-portion support cylinder, and is housed in the heat-sensitive part Pressurized by pressing the disassembly part through the pistunt A fusible alloy that is obtained by construction by a coil spring for urging the decomposition section presser provided at the lower portion of the spring member downward.

(2) Further, the deflector of (1) above is
It has a plurality of connecting pillars that are integrally formed with the deflector and that have a press-fitting part that is press-fitted into the locking hole provided in the stopper ring at the top, and when the deflector is assembled in the frame with the upper end of the blade. The height is the same as or lower than the upper end of the disassembling part support cylinder.

(3) Further, the heat-sensitive portion of the above (1) is attached to the disassembling portion supporting cylinder via a ring. (4) Further, the spring member of the above (1) is configured by two disc springs having small diameter portions fixed with rivets. (5) Furthermore, a metal plate is provided in the fusible alloy of (1) above.

[0009]

[Function] When a fire occurs, the heat-sensitive air current heats the heat-sensitive plate. The heat heats the fusible alloy from its surroundings and begins to melt. The melted fusible alloy flows out from between the cylinder and the piston, and its volume increases. Is reduced. At this time, the fusible alloy is uniformly heated by the metal plate provided inside, and the decomposition support tube and the heat-sensitive section are connected via the C ring, so the contact area between the two is extremely small. For this reason, the heat escaping from the heat sensitive portion to the decomposition portion support cylinder is extremely small, and most of the heat is added to the fusible alloy, so that the fusible alloy melts in a short time.

When the fusible alloy is melted and its volume is reduced, the decomposed portion retainer is pressed down by the coil spring, and the disassembled portion support cylinder is also pressed down by the spring member and descends using the deflector blades as guides. As a result, the lock ball is disengaged from the ball hole of the frame and is located in the ball insertion hole of the disassembly section support cylinder and the recess of the lock retainer, the disassembly section support cylinder is unlocked, and the heat-decomposition section has its own weight and fire water. The water pressure causes the water to drop rapidly and fall from the frame. At the same time, the deflector including the valve body also falls due to its own weight and the water pressure of the fire extinguishing water, and the stopper ring sits on the stepped portion of the frame and stops. As a result, the water discharge port of the main body is opened, and the fire extinguishing water is sprayed from the water spray port of the deflector.

[0011]

【Example】

Example 1. 1 is a longitudinal sectional view of a first embodiment of the present invention, FIG. 2 is an external view of FIG. 1 showing a part of the cross section, and FIG. 3 is an exploded perspective view of FIG. In the figure, reference numeral 1 denotes a main body having a water discharge port 2 penetrating the center thereof, a first screw portion 3 connected to a water supply pipe is provided on an upper surface of a flange 4, and a lower surface of the flange 4 is described later. Is provided with a second screw portion 5 into which the frame 10 is screwed, and a cylindrical portion 6 having a smaller diameter than that of the second screw portion 5 is projectingly provided at a lower end portion of the second screw portion 5.

Reference numeral 10 denotes a cylindrical frame, which is provided at its upper portion with a female screw portion 11 to be screwed into the second screw portion 5 of the main body 1, and has a flange-shaped step portion 12 formed at its lower end portion. The step portion 12 has a plurality of (three in this embodiment) ball holes 13 formed at equal intervals and orthogonal to the side wall. Numerals 14a and 14b are slits provided substantially in the middle of the side wall in the up-down direction, for imparting some springiness to the frame 10 and also for confirming at the time of a water leak test. It may be omitted.

Reference numeral 15 is a valve body for sealing the water discharge port 2 of the main body 1, and as shown in FIG. 4, a substrate 16 having an outer diameter substantially equal to the outer diameter of the cylindrical portion 6 of the main body 1, and a projection on the upper surface of the substrate 16. A head 17 that is provided and inserted into the water outlet 2 of the main body 1, a protrusion 18 that protrudes from the center of the lower surface of the substrate 16, and a caulking piece 19 that is provided concentrically with the protrusion 18 on the lower surface of the substrate 16. It consists of Reference numeral 16a is a gasket made of, for example, tetrafluoride resin, which is fitted on the head 17 and is installed on the substrate 16.

Reference numeral 20 is a deflector assembly, and the deflector 21 is provided with a plurality of blades 23 radially protruding at substantially equal intervals on the outer periphery of a disk-shaped substrate 22 as shown in the development view of FIG. 5A. The plurality of blades 23a, 2 located at substantially equal intervals (for example, 120 ° intervals) among the blades 23.
3b and 23c are further extended to form connecting columns 24a and 24
b and 24c are formed. The connecting columns 24a to 24c
Of the blades 23a-23c are the blades 23a-23c.
Is formed in a fitting portion (intermediate portion) 25a having a width W ₁ narrower than the width W ₁ of the fitting portion 25a and a width W ₂ wider than the width W ₁ of the fitting portion 25a.
Is formed with a press-fitting portion (upper part) 25b, and further, the engaging portion 2 having a width W ₃ wider than the width W ₂ of the press-fitting portion 25b is formed at the tip.
5c is provided. Reference numeral 26 is a through hole provided in the center of the substrate 22.

The blades 23 are bent upward from the position indicated by the broken line in FIG. 5 (a) and have sprinkler ports 27 between the blades 23 as shown in FIGS. 5 (b) and 5 (c). The deflector 21 is formed. The inside diameter of the deflector 21 is slightly larger than the outside diameter of the cylindrical portion 6 of the main body 1. In addition, in FIG.5 (c), each connection pillar 24a-24c
Is slightly inclined outward, but may be vertical.

As shown in FIG. 6, 28 is a stopper ring, the inner diameter of which is slightly larger than the outer diameter of the cylindrical portion 6 of the main body 1, the outer diameter is smaller than the inner diameter of the frame 10, and the step portion when descending. It is formed in such a size that it can be locked in the 12. In addition, the rectangular locking holes 2 corresponding to the connecting columns 24a to 24c of the deflector 21 (hence, at 120 ° intervals).
9a, 29b, 29c are provided, and the locking hole 29a
.About.29c are opened to the outer circumference through locking claws 30a and 30b. The width W _{4 of the} locking holes 29a to 29c is the width W ₂ of the press-fitting portion 25b of the connecting columns 24a to 24c of the deflector 21.
Is approximately equal to or slightly narrower than
The width is smaller than the width W _{3 of} c, and the locking claw 30
a, a width W ₅ between 30b is approximately equal to or slightly wider width W ₁ of the fitting portion 25a of the connecting post 24a-24c.

In order to assemble the deflector assembly 20 composed of the deflector 21 and the stopper ring 28 as described above, first, the caulking piece 19 of the valve body 15 is inserted into the through hole 26 provided at the center of the deflector 21, and the caulking is performed. The valve body 15 and the deflector 21 are integrally connected. Then, as shown in FIG. 7 (the valve body 15 is omitted in FIG. 7),
Fitting portions 25a of the connecting columns 24a to 24c of the deflector 21.
Are inserted into the locking holes 29a to 29c from between the locking claws 30a and 30b of the stopper ring 28, and then the stopper ring 28 is pulled up (or the deflector 21 is pulled down) as shown in FIG. The upper surface is the connecting pillar 2
The locking portions 25c of 4a to 24c are brought into contact with each other. At this time,
The press fitting portions 25b of the connecting columns 24a to 24c are press fitted into the locking holes 29a to 29c, and the stopper ring 28 is held at that position. If the locking claws 30a and 30b are caulked, the connecting columns 24a to 24c can be more reliably fixed.

Reference numeral 31 denotes a disassembling part support cylinder (cylindrical body) which is slidably disposed in the frame 10 and has a substantially bottomed cylindrical shape.
As shown in FIG. 5, the inner diameter of the upper portion is formed into a large inner diameter portion 32 of a size in which the deflector 21 can be loosely fitted, and the lower portion is reduced in diameter to form a small inner diameter portion 33, and a step portion 34 is provided between the two. Has been formed. Reference numeral 35 denotes a concave portion provided at the center of the bottom, a hole 36 is provided at the center, and a flange-shaped locking portion 37 is formed on the outer periphery of the hole 36. Three
Reference numeral 8 denotes a plurality of ball insertion holes formed above the bottom portion and penetrating the side wall of the small inner diameter portion 33 at equal intervals. The height of the disassembling part support cylinder 31 is selected so that the upper end thereof when installed in the frame 10 is substantially coincident with the upper end of the blade 23 of the deflector 21 or is higher than the upper end. The blades 23 and the disassembly support cylinder 31 act to guide each other.

As shown in FIG. 10, a heat sensitive portion 40 is a cylinder 41 having a bottomed cylindrical shape, and disc shaped heat sensitive plates 42a, 42 provided on the lower surface and the outer wall of the substantially central portion in the height direction.
b, and the upper end of the cylinder 41 has a flange-shaped locking claw 4 with an outer diameter that can be inserted into the hole 36 of the disassembly unit support cylinder 31.
3 is provided. The heat sensitive plates 42a and 42b are 1
The number may be one, or three or more may be provided.

Reference numeral 45 denotes a disk-shaped balancer, which is formed in a substantially V-shaped cross section having a high central portion and a low peripheral portion as shown in FIG. 11, and a through hole 46 is provided in the central portion. . The outer diameter of the balancer 45 is formed slightly smaller than the inner diameter of the large inner diameter portion 32 of the disassembly portion support cylinder 31.

Reference numeral 47 is a spring member, an embodiment of which is shown in FIG. In the drawing, reference numerals 48a and 48b are disc springs having a substantially C-shaped cross section and a connecting hole 49 is provided at the center (hereinafter, the central portion having the connecting hole 49 is referred to as the small diameter portion 5).
It is called 0, and the outer peripheral portion is called the large diameter portion 51). Then, between the small-diameter portion 50 and the large-diameter portion 51, a plurality of substantially triangular through-holes having a vertical angle on the small-diameter portion 50 side so that both edges of a leaf spring portion 53 described later are substantially parallel to each other. 52a, 52b, 52c
Are provided at substantially equal intervals, and these through holes 52a ...
The area provided with 52c has the function of a leaf spring (hereinafter, this area is referred to as a leaf spring portion 53), and the through hole 52a is provided.
The region outside 52 c has a disc spring function (this region is hereinafter referred to as disc spring portion 54).

Belleville springs 48a, 48b constructed in this way
As shown in FIG. 12C, the large diameter portions 51, 5 are
1 toward the outside, the small diameter portions 50, 50 are brought into contact with each other, and the connecting hole 4
Insert rivets 55 into 9,49 and caulk them, and set both disc springs 4
The spring member 47 is configured by integrally connecting 8a and 48b. The outer diameter of the spring member 47 is the same as that of the disassembled portion support cylinder 3.
It is formed slightly smaller than the inner diameter of the large inner diameter portion 32.

Denoted at 56 is a disassembled portion retainer slidably accommodated in the small inner diameter portion 33 of the disassembled support cylinder 31, and has an upper flange portion 57 and a lower flange portion 58 on the outer periphery as shown in FIG.
Is formed into a substantially bottomed cylindrical shape, and a recess 59 is formed between the upper and lower flange portions 57 and 58. Further, a substantially vertical contact surface 60 is provided on the outer periphery of the lower flange portion 58 via an inclined surface. Reference numeral 61 is an adjustment hole, 63 is a set screw screwed into a screw hole 62 provided in the bottom portion, and 64 is a coil spring arranged in the disassembly portion retainer 56.

Reference numeral 66 is a fusible alloy such as compression solder contained in the cylinder 41 of the heat-sensitive section 40.
As shown in FIG. 4, a metal plate 67 having a high thermal conductivity, such as a thin copper plate or a copper foil, is embedded in the substantially central portion in the vertical direction over the entire surface. It is divided into a lower part 66b. Instead of embedding the metal plate 67, the fusible alloy 6 is provided on both sides of the metal plate 67.
6, the upper part 66a and the lower part 66b may be welded and bonded, or the fusible alloy of the lower part 66b may be attached to the metal plate 67.
Alternatively, the fusible alloy of the upper portion 66a may be simply placed thereon.

The thickness of the metal plate 67 and the fusible alloy 66
When the fusible alloy 66 is melted, the piston 6
It is set appropriately so as not to hinder the fall of No. 8. The thickness of the metal plate 67 is 0.05 to
It has been found that about 0.3 mm is preferable.

Reference numeral 68 denotes a fusible alloy 6 in the cylinder 41.
6 is a piston that is slidably accommodated on the upper and lower sides of the upper part 6 and has a recess 69 at the center of the upper surface. Reference numeral 70 denotes a locking portion 37 provided in the recess 35 of the disassembling portion support cylinder 31, and a heat sensitive portion 40.
A C ring as a ring interposed between the locking claw 43 and 71 is a plurality of lock balls made of steel. An O ring may be used as the ring 70. Further, the inner diameter of the ball hole 13 provided in the frame 10 is smaller than the outer diameter of the lock ball 71, and the inner diameter of the ball insertion hole 38 provided in the disassembly portion support cylinder 31 is larger than the outer diameter of the lock ball 71. Has been done.

Next, an example of the assembling order of the present embodiment, which comprises the above-mentioned respective parts, will be described. (1) The fusible alloy 66 and the piston 68 are inserted into the cylinder 41 of the heat sensitive section 40. (2) Insert the tip of the cylinder 41 of the heat sensitive part 40 into the hole 36 provided in the recess 35 of the disassembly part support cylinder 31, mount the C ring 70 under the locking claw 43, and lower it. As a result, the heat sensitive section 40 is attached to the disassembly section support cylinder 31 via the C ring 70.

(3) The disassembly section support cylinder 31 is erected, and the disassembly section retainer 56 is inserted into the disassembly section support cylinder 31 from the upper opening. At this time, the set screw 63 is raised to position the disassembly portion presser 56 below the ball insertion hole 38 of the disassembly portion support cylinder 31, and the tip end of the set screw 63 is recessed in the piston 68.
Abut on 9.

(4) Insert the lock balls 71 from the outside into the respective ball insertion holes 38 of the disassembling part support cylinder 31,
Insert the lock ball 71 into the ball insertion hole 38 and the disassembly portion retainer 56.
It is located between the recess 59 and the recess 59. (5) The disassembly portion support cylinder 31 is inserted into the frame 10 from below to align the ball hole 13 with the ball insertion hole 38 of the disassembly portion support cylinder 31. Then, a substantially L-shaped jig is inserted from the opening portion of the disassembly portion presser 56, the tip portion thereof is inserted into the adjustment hole 61, and the lock ball 71 is pushed to partially insert it into the ball hole 13 of the frame 10. Induce each.

(6) The set screw 63 is rotated to raise the disassembled portion presser 56, and the abutment surface 60 thereof is brought into contact with the lock ball 71 to press it outwardly, so that a part of the lock ball 71 is pushed to the frame 10. Disassembly part retainer 5 by protruding into the ball hole 13 of
6 and thereby hold the disassembling part support cylinder 31 in that position. In addition, the heat sensitive portion 40 is fixed by the set screw 63.
Is pressed down and locked. At this time, by looking through the ball hole 13, it is confirmed from the outside whether or not the lock ball 71 is held at a predetermined position.

(7) A coil spring 64 is provided in the disassembly portion retainer 56.
Valve member 15 attached to the deflector 21 by inserting the spring member 47, the balancer 45, and the deflector assembly 20 into the large inner diameter portion 32 of the disassembling portion support cylinder 31.
The protrusion 18 is inserted into the through hole 46 of the balancer 45.

(8) The cylindrical portion 6 of the main body 1 is inserted into the stopper ring 28, and the tip end thereof is brought into contact with the upper surface of the substrate 16 of the valve body 15 (the gasket 16a is mounted on the upper surface of the substrate 16). , The second screw portion 5 is screwed into the female screw portion 11 of the frame 10. Thereby, the deflector assembly 20 including the spring member 47, the balancer 45, and the valve body 15 is provided.
Is pressed down against the coil spring 64, and the lower surface of the disc spring 48 b below the spring member 47 has the lower surface of the step portion 3 of the disassembly portion support cylinder 31.
Hit 4 Further, both disc springs 48a, 4 of the spring member 47 are
The main body 1 is screwed in until the 8b is in close contact, and the disassembly portion support cylinder 31 is locked to the frame 10 to complete the assembly.

At this time, the heat sensitive portion 40 and the disassembled portion supporting cylinder 3
The lower part of 1 projects outside from the lower end of the frame 10. In addition, the above-mentioned disassembly part support cylinder 31, fusible alloy 66,
The heat sensitive portion 40 including the piston 68, the decomposition portion retainer 56, and the coil spring 64 constitute a heat sensitive decomposition portion 65. Since the inside of the disassembling part support cylinder 31 is covered by the disk-shaped balancer 45, the inside thereof has a completely sealed structure.
There is no risk of corrosion even when installed in a highly corrosive atmosphere. The heat-decomposable portion 65 is provided below the valve body 15 and is a member for unsealing the valve body 15 when the fusible alloy 66 melts during a fire. Further, the locking holes 29a to 29c of the stopper ring 28 are opened to the outer circumference, and the connecting columns 24a to 24c coupled thereto are located between the inner wall of the frame 10 and the stopper ring 28, and the opening portions are also formed. Since the locking claws 30a and 30b are provided, the connecting column 2
4a to 24c never come off from the locking holes 29a to 29c.

By the way, in the sprinkler head as described above, the water discharge port 2 of the main body 1 is set to 50 by the valve body 15.
Sealing is performed with an assembling load of about kgf to prevent water leakage, and this assembling load acts downward on the lock ball 71 via the disassembling part support cylinder 31. The lock ball 71 is pressed against the lower end of the ball hole 13 of the frame 10 by this load, and a rolling force F and a component force F ₁ as shown in FIG. 15 are generated. Since the balancer 45 is formed in a disc shape, the assembling load is applied to the lock ball 71 reliably and uniformly. For this reason, the lock ball 71 is always subjected to a force that tries to enter the inside (on the side of the disassembly portion retainer 56). However, since the lock ball 71 is prevented from moving by the contact surface 60 of the disassembling part retainer 56, it is held at that position and locks the disassembling part supporting cylinder 31.

On the other hand, the fusible alloy 66 has a lock ball 71.
Is in contact with only the abutment surface 60 which is the vertical surface of the disassembled portion retainer 56, the above-mentioned assembly load hardly acts, and only the pressing force (about 10 kgf) of the coil spring 64 is mainly applied. Unlike the head, the load applied to the fusible alloy 66 does not fluctuate depending on the water pressure of the fire extinguishing water, and the creep phenomenon does not occur in the fusible alloy 66 even if a large water pressure acts on the valve body 15.

The sprinkler head constructed as described above is inserted through the hole provided in the ceiling, and the first screw portion 3 thereof is inserted.
Is attached to the ceiling surface by connecting to the water supply pipe, and part of it is exposed from the ceiling surface. The hole provided in the ceiling is closed by a sealing plate. Also, frame 1
Since the outer diameter of 0 is small (about 22 to 23 mm), it can be installed between the T-bars of the system ceiling. In this case, for example, the first screw portion 3 of the main body 1 is screwed into the water supply pipe connected to the universal joint in the ceiling, and then the water supply pipe is moved to move part or all of the frame 10 between the T bars. It can be exposed from the inside to the room and the water supply pipe can be fixed.

Next, the operation of the present invention will be described. FIG. 1 shows a case where the sprinkler head mounted on the ceiling surface is in a warning state. Pressurized fire extinguishing water is supplied to the water discharge port 2 of the main body 1, and the valve body 15 is supplied with the fire extinguishing water. Pressure is applied. The closing force of the valve body 1 at this time is 50 kg.
f, and the rolling force applied to the fusible alloy 66 is 1
It is about 0 kgf.

Now, when a fire occurs, the heat flow heats the heat sensitive plates 42a and 42b, and the heat causes the fusible alloy 66 to be heated from the surroundings to start melting. It flows out from between 68, and its volume decreases as shown in FIG.

At this time, the fusible alloy 66 is transferred to the cylinder 68.
17 begins to melt from the surface in contact with, and hence from the bottom and the outer periphery, but the heat is transferred to the metal plate 67 and the lower surface of the upper portion 66a and the upper surface of the lower portion 66b of the fusible alloy 66 as shown by the arrow in FIG. Since the fusible alloy 66 is heated, the fusible alloy 66 can be melted not only from the outside but also from the inside. For this reason, the heat is quickly transferred to the fusible alloy 66, and the whole is heated almost uniformly so that the fusible alloy 66 can be surely melted in a short time, and the core of the fusible alloy 66 does not remain. Therefore, the response to the fire becomes faster and the sensitivity can be improved. According to a wind tunnel test at 100 ° C. and 1.8 m / sec, it took 64 seconds until the start of operation of the flash type sprinkler head using a conventional fusible alloy, whereas as shown in FIG. When the fusible alloy 67 in which the metal plate 67 (copper plate having a thickness of 0.2 mm) is embedded is used, the time until the operation starts is 56 seconds, and the sensitivity is about 12%.
Could be improved.

On the other hand, the disassembling part support cylinder 31 and the heat-sensitive part 40 are connected via a C-ring 70, and the tip of the set screw 63 is formed thin so that the recess 69 of the piston 68 is formed.
These contact areas are extremely small because they are pressed against each other. Therefore, the heat escaping from the heat sensitive portion 40 to the disassembling portion supporting cylinder 31 and the set screw 63 is very small, and most of the heat is added to the fusible alloy 66, so that the fusible alloy 66 melts in a short time.

When the fusible alloy 66 melts and its volume decreases, the decomposed portion retainer 56 is pressed down by the coil spring 64 and descends, as shown in FIG. As a result, the lock ball 71 is disengaged from the ball hole 13 of the frame 10 and moved into the ball insertion hole 38 of the disassembling part support cylinder 31 and the recess 59 of the disassembling part retainer 56, and the disassembly part support cylinder 31 is unlocked. It The disassembly portion support cylinder 31 is also pressed down by the disc spring 48b on the lower side of the spring member 47, and the blades 23 of the deflector 21.
Use as a guide to descend. On the other hand, the disc spring 48 a on the upper side of the spring member 47 presses the valve body 15 against the main body 1 to seal the water discharge port 2.

Further, as the melting of the fusible alloy 66 progresses, the disassembly portion support cylinder 31 is pressed down by the disc spring 48b below the spring member 47 and descends, and as shown in FIG. Near the bottom end of 10. At this time,
The disc spring 48a on the upper side of the spring member 47 is still the valve body 1
5 is pressed against the body 1 to seal the water outlet 2. Then, when most of the fusible alloy 66 is melted, the lock ball 71 is disengaged from the lower end of the frame 10 as shown in FIG. 19, so that the heat-decomposable portion 65, the spring member 47, and the balancer 45 have their own weight and fire extinguishing water. The water pressure causes a sharp drop, and as shown in FIG. 20, it separates from the frame 10 and falls. At this time, the deflector 21 is also attached to the disassembled portion support cylinder 31.
The height of the disassembling section support cylinder 31 is set so that the disassembling section support cylinder 31 can be lowered by using the guide.

At the same time, the deflector assembly 20 including the valve body 15 also falls due to its own weight and the water pressure of the fire extinguishing water, and the stopper ring 28 sits on the stepped portion 12 of the frame 10 and stops. At this time, the deflector 21 is connected to the frame 10
Located below. As a result, the water outlet 2 of the main body 1 is opened, and the fire extinguishing water is sprayed from the deflector 21 to extinguish the fire.

At this time, the spring member 47 is the disc spring 48a,
Since the two 48b are overlapped so that the stroke becomes long, it is possible to promote the disengagement of the disassembling part support cylinder 31 from the frame 10 in the event of a fire.
As shown in FIG. 19, the lock ball 71 is attached to the frame 10
The valve body 15 is pressed against the lower surface of the cylindrical portion 6 of the main body 1 until the valve body 15 comes off from the lower end portion thereof to prevent water leakage. This is done before the lock ball 71 is disengaged from the frame 10.
This is to prevent the fusible alloy 66 from being cooled by water leaking from between the cylindrical portion 6 and the valve body 15. Further, since the ball insertion hole 38 of the disassembling part support cylinder 31 and the contact surface 60 of the disassembling part retainer 56 are in contact with the lock ball 71 on the planes orthogonal to each other, the lock ball 71 is removed when disassembling the heat-sensitive disassembling part 65. It does not cut into the disassembled portion retainer 56 and the like. Further, the outer diameter of the stopper ring 28 is the frame 10.
Since the inner diameter of the deflector assembly 20 is slightly smaller than the inner diameter of the deflector assembly 20 and the inner diameter of the body portion 1 is slightly larger than the outer diameter of the cylindrical portion 6, the deflector assembly 20
Smoothly falls along the frame 10 and the cylindrical portion 6 of the main body 1.

In the present invention, the fusible alloy 66 is provided at the lowermost end of the frame 10 so as to project from the lower end of the frame 10, so that the fusible alloy 66 has excellent thermal response. Therefore, the heat of the heat-sensitive portion 40 heats the fusible alloy 66 from the surroundings, and at the same time, the fusible alloy 6 passes through the metal plate 67.
Since the central part of 6 is also heated, the whole is heated uniformly and the melting time can be shortened. Therefore, a flash type sprinkler head with higher sensitivity can be realized.

Further, when the heat-sensitive decomposition section is constituted by the link mechanism using the conventional arm, a large load (about 90 to 100 kgf) is applied to the arm in order to rotate the arm outward when the heat-sensitive decomposition section is disassembled. ) Must be applied, but in the present invention, as described above, since a force in the direction of separating from the frame 10 is always applied to the lock ball 71 by the assembly load,
Even if the assembly load is as low as gf, it can be operated sufficiently in case of fire. Therefore, for sealing the valve element 15, a tetrafluororesin gasket that is highly elastic and does not corrode even if installed in a highly corrosive atmosphere and that can reliably seal even under a low load is used. be able to.

By the way, in the flash type sprinkler head as described above, if there is no spring member 47 or the spring member is composed of one disc spring,
When the fusible alloy 66 is melted and the decomposition part support cylinder 31 starts to descend, the deflector assembly 20 including the balancer 45 and the valve body 15 also descends to open the water discharge port 2, so that the fire extinguishing water leaks. Then, the fusible alloy 66 is cooled and flows into the heat-sensitive section 40, so that the fusible alloy 66 cannot be melted. For this reason, the disassembling part support cylinder 31 cannot be lowered, stops halfway without being unlocked, and cannot be dropped because it is held in the state of FIG. 18, for example, and thus fire extinguishing water cannot be discharged in some cases.

In the present invention, the spring member 47 is composed of the leaf spring portion 53 and the disc spring portion 54, and the large diameter portions 51 of the two disc springs 48a and 48b having a C-shaped cross section are directed in opposite directions. Since the small-diameter portion 50 is abutted and fixed to enhance elasticity and lengthen the stroke, the upper disc spring 48a in the state of FIGS.
Is pressed against the cylindrical portion 6 of the main body 1 to seal the water discharge port 2, and the disc spring 48b on the lower side is constituted by the disassembly portion supporting cylinder 31 and the coil spring 64.
By pressing down, the disassembly portion support cylinder 31 by the lock ball 71
Promote unlocking of.

As a result, the fusible alloy 66 is surely melted, the lock of the disassembling part support cylinder 31 is released, and then the valve body 15 is lowered to open the water discharge port 2 as shown in FIG. Therefore, the disassembling part support cylinder 31 does not stop descending before the lock is released, and water can be reliably discharged to extinguish the fire. In addition, if the spring member 47 has a stroke and force enough to press the valve body 15 against the cylindrical portion 6 until the thermosensitive decomposition portion 65 is securely decomposed and falls, that is, the force of the spring member 47 extinguishes. If it is stronger than the pressure of water, the valve body 15 can be kept in pressure contact with the cylindrical portion 6 until the fusible alloy 67 is melted as shown in FIG.

Since the spring member 47 is constructed as described above, the assembling load can be adjusted to a predetermined value when the sprinkler head is assembled, and the load applied to the valve body 15 during long-term use. Even if the value changes, the change can be automatically compensated by the spring member 47, and the value can always be maintained at a predetermined value. Furthermore, a fire occurred and the fusible alloy 66
Is melted, the disc spring 48b on the lower side of the spring member 47 accelerates the lowering of the disassembling portion pressing member 56 and the disassembling portion supporting cylinder 31 to accelerate the fall of the heat-sensitive decomposition portion 65, and at the same time, the upper disc spring 48.
In a, the valve body is pressed against the frame 10 to seal the water discharge port 2,
The fire extinguishing water is prevented from leaking from the water discharge port 2 to cool the melting soluble alloy 66.

Further, the small diameter portions 50 of the two disc springs 48a and 48b are brought into contact with and integrally coupled to each other to form the spring member 47, and the outer diameter of the spring member 47 is larger than that of the disassembly portion support cylinder 31. Since it is formed slightly smaller than the inner diameter of the inner diameter portion 32 and is placed on the step portion 34 of the disassembling portion supporting cylinder 31, a special member or the like for holding the spring member 47 at a predetermined position is required. In addition, it is possible to obtain twice the stroke and elasticity as compared with the conventional spring member.

Further, since the spring member 47 is formed by the disc springs 48a and 48b having the plate spring portion 53 and the disc spring portion 54, it is possible to obtain a predetermined stroke without using a spring having a large stroke such as a coil spring. Since both disc springs 48a and 48b are in close contact with each other when the head is assembled, the height of the sprinkler head can be reduced. In addition,
Since the plate springs 53 are formed in the disc springs 48a and 48b by providing the through holes 52a to 52c, the disc spring 48 is formed.
Even if a large force is applied to the central portions of a and 48b, the central portions will not be deformed. Further, since the disc springs 48a and 48b have a shape in which the plate spring portion 53 is added to the normal disc spring (that is, the disc spring portion 54), the stroke can be increased accordingly.

In the above description, the three ball holes 13 are formed in the frame 10 and the disassembled part support cylinder 31 at 120 ° intervals.
Although the case where the ball insertion hole 38 and the ball insertion hole 38 are provided is shown, the number of these holes is not limited to three and may be two or more. Similarly, the connecting columns 24a to 24c formed by extending the blades 23 of the deflector 21 may be two or more,
Further, the connecting column may be formed separately from the deflector 21 and integrally connected. In addition, the heat sensitive portion 40 is connected to the C ring 70
The case where it is attached to the disassembling part support cylinder 31 via
It may be attached by screws or other means.
Also, the one without the metal plate 67 may be used.

Further, the case has been shown in which the two disc springs 48a and 48b are arranged such that the large diameter portion 51 is on the outside and the small diameter portion 50 is brought into contact with them, and the spring member 47 is constituted by integrally connecting with the rivet 55. Without fixing the two disc springs 48a and 48b,
The small diameter part 50 may be accommodated in the disassembly part support cylinder 31 in a state of being in contact therewith. In addition, the spring member 47 or the two disc springs 48
Although the case where a and 48b are housed in the disassembled part support cylinder 31 is shown, they may be housed in a cylindrical body such as a frame depending on the structure of the sprinkler head. Further, although the case where the opening of the stopper ring 28 is formed on the outer peripheral side is shown, the opening may be provided on the inner peripheral side.

[0055]

As is apparent from the above description, according to the present invention, the following effects can be obtained. (1) A cylindrical frame coupled to a main body having a water discharge port, and a bottomed cylindrical disassembled part support cylinder slidably disposed in the frame and having a lower portion slightly protruding from a lower end of the frame. A heat-sensitive decomposition section disposed inside and in the bottom of the disassembly section support cylinder, which normally prevents the disassembly section support tube from detaching from the frame, and disengages the disassembly section support tube from the frame in the event of a fire; Inside, a spring member arranged in a step portion formed substantially in the center of the disassembling part supporting cylinder, and a disk-shaped balancer having an outer diameter substantially equal to the inner diameter of the disassembling part supporting cylinder arranged on the spring member. And has a valve body that closes the water outlet,
With a deflector assembly arranged on the balancer, the heat-sensitive decomposition section is arranged in the ball insertion hole provided in the disassembly section support cylinder, and slidably arranged in the disassembly section support cylinder. The heat-sensitive part that holds the lock ball in a state in which part of it protrudes into the ball hole provided in the frame, and the heat-sensitive plate that has a heat-sensitive plate and that protrudes from the bottom of the disassembly-portion support cylinder The heat-decomposable part is composed of a fusible alloy that is housed inside the part and is pressed by the decomposition part retainer via the pistunt, and a coil spring that is provided below the spring member and urges the decomposition part retainer downward. Since a plurality of lock balls slightly locked in the ball holes provided in the stepped portion of the frame are used to prevent the fall of the main components, Then frame Can be thin, this makes it possible to obtain a compact and small-diameter sprinkler head.

Further, by covering the heat-sensitive decomposition portion composed of a rock ball and the like with a bottomed cylindrical decomposition portion support cylinder, the heat-sensitive decomposition portion is constructed so as not to be seen from the outside, so that a sprinkler head having an excellent design is obtained. Obtainable. Further, in terms of manufacturing, it is not necessary to fabricate the complicated-shaped arm that constitutes the link mechanism by press work as in the conventional case, and therefore the work is easy, and the fusible alloy has only the load of the coil spring. Therefore, it is not necessary to use a high-strength material for parts such as the piston, and therefore the manufacturing cost can be reduced.

Further, since a step portion is provided on the inner peripheral surface of the disassembling portion support cylinder, and a substantially disk-shaped balancer is placed on the step portion through a spring member, when the sprinkler head is assembled, the balancer is mounted. The valve provided above seals the water outlet of the main body with an assembly load of about 50 kgf, and prevents water leakage of fire extinguishing water. At this time, the assembly load acts downward on the lock ball via the balancer placed on the step,
The disassembly section support cylinder can be locked to the frame. Further, since the balancer is formed in a disk shape, this assembly load can be reliably and uniformly applied to each lock ball. Further, since the heat-decomposable portion has a completely sealed structure, there is no risk of corrosion even when installed in a highly corrosive atmosphere.

Furthermore, since the contact surfaces of the disassembly portion support cylinder and the disassembly portion retainer and the lock balls are formed as planes orthogonal to each other, the lock balls bite into the disassembly portion retainer and the like, which causes trouble in disassembly at the time of fire. Never. In addition, the load applied to the fusible alloy varies depending on the water pressure of the fire extinguishing water, as with the conventional sprinkler head, because the assembly load hardly acts on the fusible alloy and only a constant reduction force of the coil spring is always applied. As a result, a large load is applied to the fusible alloy, creep phenomenon does not occur in the fusible alloy, the operation is reliable, and since the fusible alloy is located below the frame, the sensitivity is increased. You can

Further, since the coil spring for urging the disassembling part retainer is provided inside the disassembling part retainer, the fusible alloy is constantly pressed by this coil spring, and when the fusible alloy melts in a fire, the disassembling part retainer is The coil spring slides downward to promote the disengagement of the disassembly portion support cylinder from the frame.

(2) The deflector of (1) above is provided with a plurality of connecting columns integrally formed with the deflector, the upper part of which has a press-fitting portion to be press-fitted into a locking hole provided in the stopper ring.
Moreover, since the upper end of the blade is configured to be at the same height as or lower than the upper end of the disassembling part support cylinder when the deflector is assembled into the frame, a deflector that is easy to manufacture and operates reliably can be obtained. be able to. Further, since the blades position the disassembly unit support cylinder during assembly and the blades serve as guides for the disassembly unit support cylinder when a fire occurs, the disassembly support cylinder can be smoothly lowered in the vertical state.

(3) Since the heat-sensitive part of the above (1) is attached to the disassembly part support cylinder via the ring, the contact area between the both can be reduced. For this reason, it is possible to minimize the heat that escapes from the heat-sensitive part heated by the occurrence of a fire to the decomposition part support cylinder, and the fusible alloy can be melted in a short time, so the sensitivity of the flash-type sprinkler head is improved. Can be improved.

(4) Since the spring member of the above (1) is composed of two disc springs with the small diameter portion fixed by rivets, a spring member having a double stroke can be obtained. Not only can the head be made smaller and the diameter smaller, but also in the event of a fire, the decomposition and dropping of the heat-sensitive decomposition part can be promoted, and the valve body is pressed against the cylindrical part until the heat-sensitive decomposition part is decomposed and fire extinguishing water It is possible to prevent water leakage and prevent cooling of the fusible alloy during melting. Further, since the two disc springs are integrally connected by the rivet inserted in the connecting hole provided in the center portion, there is no fear that the two disc springs will be displaced from each other, and the disc springs can be always held at a predetermined position.

(5) Since the metal plate is provided in the fusible alloy of (1) above, the heat received by the heat-sensitive part due to the occurrence of fire is
The heat is transferred from the outer periphery to the fusible alloy, and the heat is transferred to the inside of the fusible alloy via the metal plate, and the whole is heated almost uniformly. Therefore, the fusible alloy can be surely melted in a short time without leaving a core in the central portion, and thereby the sensitivity of the sprinkler head can be significantly improved. Further, if the metal plate is made of a thin copper plate or a copper foil, the metal plate is easily available and the increase in cost can be prevented.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is an external view of FIG. 1 with a part thereof shown in cross section.

FIG. 3 is an exploded perspective view of FIG.

4 shows the valve body of FIG. 1, (a) is a plan view,
(B) is a side view and (c) is a bottom view.

5A and 5B show the deflector of FIG. 1, where FIG. 5A is a development view, FIG. 5B is a plan view, and FIG. 5C is a side view.

6A and 6B show the stopper ring of FIG. 1, in which FIG. 6A is a plan view and FIG. 6B is a side view.

FIG. 7 is an explanatory view showing the assembly sequence of the deflector assembly.

FIG. 8 is an explanatory view showing the assembly sequence of the deflector assembly.

9 is a cross-sectional view of the disassembled portion support cylinder of FIG.

FIG. 10 is a cross-sectional view of the heat-sensitive part of FIG.

11 is a cross-sectional view of the balancer of FIG.

12A and 12B show the spring member of FIG. 1, wherein FIG. 12A is a plan view of a disc spring, FIG. 12B is a sectional view thereof, and FIG.

13 is a cross-sectional view of the disassembled portion retainer of FIG.

14 is an explanatory diagram of the fusible alloy of FIG. 1. FIG.

FIG. 15 is an explanatory view of the operation of the lock ball shown in FIG. 1.

FIG. 16 is an explanatory view of the operation of the present invention.

FIG. 17 is an explanatory view of the operation of the present invention.

FIG. 18 is an explanatory view of the operation of the present invention.

FIG. 19 is an explanatory view of the operation of the present invention.

FIG. 20 is an explanatory view of the operation of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Water discharge port 10 Frame 13 Ball hole 15 Valve body 20 Deflector assembly 21 Deflector 22 Substrate 23 Blade 24a-24c Connecting column 25b Press-fitting part 28 Stopper ring 29a-29c Locking hole 30a-30c Locking claw 31 Disassembly part support cylinder 37 Locking Part 38 Ball Inserting Hole 40 Heat Sensitive Part 41 Cylinder 42a, 42b Heat Sensing Plate 43 Locking Claw 45 Balancer 47 Spring Member 48a, 48b Disc Spring 55 Rivet 56 Disassembly Part Presser 59 Recess 60 Abutment Surface 63 Set Screw 65 Thermosensitive Decomposition Part 64 Coil spring 66 Soluble alloy 67 Metal plate 68 Piston 70 C ring 71 Lock ball

Claims (5)

[Claims] 1. A cylindrical frame connected to a main body having a water discharge port, and a bottomed cylindrical disassembled slidably disposed in the frame, the lower part of which is slightly projected from the lower end of the frame. And a heat-sensitive decomposition section that is disposed inside and at the bottom of the disassembly section support cylinder and that normally prevents the disassembly section support tube from detaching from the frame and that disengages the disassembly section support tube from the frame in the event of a fire. A spring member disposed in a step portion formed in substantially the center of the disassembling part supporting cylinder in the disassembling part supporting cylinder; and an inner diameter of the disassembling part supporting cylinder disposed on the spring member. A disk-shaped balancer having the same outer diameter, a valve body that closes the water discharge port, and a deflector disposed on the balancer are provided, and the heat-sensitive decomposition section is provided in the decomposition section support cylinder. The lock ball placed in the ball insertion hole The disassembling part support is provided slidably in the disassembling part supporting cylinder, and holds the disassembling part holding part of the lock ball in a state that a part thereof protrudes into the ball hole provided in the frame, and the heat sensitive plate. A heat-sensitive portion provided so as to project from the bottom of the cylinder, a fusible alloy that is housed in the heat-sensitive portion and is pressed by the decomposition portion retainer via a pistunt, and the decomposition portion retainer provided below the spring member. The flash type sprinkler head is characterized in that it is constituted by a coil spring for urging downward. 2. A deflector is provided with a press-fitting portion at its upper portion, which is press-fitted into a locking hole provided in a stopper ring, has a plurality of connecting columns integrally formed with the deflector, and has an upper end portion of the blade. 2. The flash-type sprinkler head according to claim 1, wherein the height is the same as or lower than the upper end of the disassembling part support cylinder when the is installed in the frame. 3. The flash-type sprinkler head according to claim 1, wherein the heat-sensitive portion is attached to the disassembling portion support cylinder via a ring. 4. The flash type sprinkler head according to claim 1, wherein the spring member is composed of two disc springs having small diameter portions fixed with rivets. 5. The flash type sprinkler head according to claim 1, wherein a metal plate is provided in the fusible alloy.