JP3427232B2 - Flash type sprinkler head - Google Patents

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 when a fire occurs, and more particularly to a deflector assembly.

[0002]

2. Description of the Related Art As an example of a conventional deflector, Jitsuko Sho 5
There is a device described in Japanese Patent Laid-Open No. 8-16785. This deflector bends and extends at least two of a large number of water spray plates that are bent and protruded upward through a slit at the same position as the bent position of each water spray plate, and has a bulge portion at the tip. Forming a support piece having. Then, the tip of this support piece is caulked to the ring body and fixed by welding or the like.

Further, in Japanese Utility Model Laid-Open No. 4-103167, a main body, blades, two columns and a semi-annular ring are integrally punched from a plate by pressing, the vanes and the post are bent upward, and a semi-annular ring is formed. There is disclosed a deflector in which a semi-annular overlapping portion is joined by welding or the like by bending the inward with respect to the support and overlapping the free ends thereof.

[0004]

The sprinkler head is being miniaturized in response to the demands of the times. In particular, recently, the ceiling of a building is often a so-called system ceiling. Is narrow (usually 25m
Therefore, in order to arrange the sprinkler head between the T-bars and connect it to the water pipe installed in the ceiling, the sprinkler head, especially the outer diameter of the frame, should be reduced (22 ~
23 mm).

When the frame is made thin, the deflector, stopper ring and other parts housed therein must be made small, but in the deflector described in Japanese Utility Model Publication No. 58-16785, the support piece is a ring body. Since they are fixed by caulking or welding when they are attached, a large number of jigs and welders are required in any case, and a large number of man-hours are required for manufacturing, so an increase in cost is inevitable. . In particular, in the case of welding, there is a possibility that the small and thin support piece or ring body may be deformed or damaged due to the heat.

In the deflector disclosed in Japanese Utility Model Laid-Open No. 4-103167, the free ends of the semi-annular rings are overlapped and integrally joined by welding or the like. Since the machine is required and a lot of man-hours are required for manufacturing, the cost is increased. Moreover, since the stopper ring joins the free ends of the semi-annular rings by superimposing them, only one strut can be provided, one for each semi-annular ring. Therefore, not only is it inferior in strength,
For example, when installing a flash-type sprinkler on a sloping ceiling such as an escalator ceiling, it must be installed at an angle with respect to the floor surface, but if the deflector has two columns, it will be caught in the event of a fire. There is a problem that it may not fall surely.

The present invention has been made to solve the above-mentioned problems, and it is extremely easy to manufacture the deflector assembly, and the deflector assembly is surely dropped and extinguished when a fire occurs regardless of the installation posture. The purpose is to obtain a flash type sprinkler head capable of sprinkling water.

[0008]

[Means for Solving the Problems]

(1) In the flash-type sprinkler head according to the present invention, the connecting column is formed such that the middle part is thin, the upper part is larger than the middle part, and the upper end part is larger than the upper part, and the connecting column is connected to the connecting column in correspondence with the connecting column. Locking holes with a size into which the upper part of the pillar can be press-fitted are provided, and openings with a size into which the middle part of the connecting pillar can be fitted are provided on the outer peripheral side or the inner peripheral side of these locking holes. The deflector assembly is formed by inserting the middle portion of the connecting column into the stop hole, pulling up the stopper ring, and press-fitting the upper portion of the connecting column into the locking hole.

(2) The connecting column of (1) above is formed by extending the vane plate of the deflector. (3) Further, a screw is provided at the lower end of the connecting column of the above (1), and a screw hole into which the screw is screwed is provided in the deflector.

[0010]

[0011]

[Function] When a fire occurs, the heat-sensitive air current heats the heat-sensitive plate, and 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. As a result, the disassembly portion presser is pressed down by the coil spring and descends. For this reason, the lock ball disengages from the ball hole of the frame and transfers into the ball insertion hole of the disassembly part support cylinder and the recess of the lock retainer, the lock of the disassembly part support cylinder is released, and the lock ball is pressed down by the blade plate of the deflector. Use as a guide to descend. Then, the heat-decomposing section rapidly descends due to its own weight and the water pressure of the fire extinguishing water, and falls from the frame. At the same time, the deflector assembly including the valve element 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 outlet of the main body is opened, and fire extinguishing water is sprayed from the water outlet of the deflector to extinguish the fire.

[0012]

【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 at its lower end portion. The step portion 12 has a plurality of 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 vertical direction of the side wall, and
0 has a little springiness, and is a hole for confirmation at the time of a water leak test, but this hole may be omitted.

Reference numeral 15 denotes 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 protruding portion 18 that protrudes from the center of the lower surface of the substrate 16, and a crimping piece 19 that is concentrically provided with the protruding portion 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 denotes a deflector assembly. As shown in the development view of FIG. 5 (a), the deflector 21 has a plurality of blade plates 23 radially provided on the outer periphery of a disk-shaped substrate 22 at substantially equal intervals. A plurality of blade plates 23 that are provided and located at substantially equal intervals (for example, 120 ° intervals) of the blade plates 23.
a, 23b, and 23c are further extended to form a connecting column 24.
a, 24b, 24c are formed. This connecting pillar 24a
24c is the blade plate 2
Fitting portion (intermediate portion) having a width W ₁ narrower than the width W of 3a to 23c
Formed in 25a, its previously are press-fit portion (upper portion) 25b of a width W ₁ than the width W ₂ of the insertion portion 25a is formed, further tip width W than the width W ₂ of the press-in portion 25b in the _Three locking portions 25c are provided. 26 is the substrate 22
It is a through hole provided in the central part of.

The vane plates 23 are bent upward from the position indicated by the broken line in FIG. 5 (a), and as shown in FIGS. 5 (b) and 5 (c), sprinkler ports 27 are provided between the vane plates 23, respectively. 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-24
Although c is slightly inclined outward, it 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 being 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 slightly wider than the 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 having a substantially bottomed cylindrical shape slidably disposed in the frame 10. As shown in FIG. 9, the inside diameter of the upper part thereof has a size such that the deflector 21 can be loosely fitted therein. Is formed in the large inner diameter portion 32, the lower portion thereof is reduced in diameter to form the small inner diameter portion 33, and a step portion 34 is formed between the both. Reference numeral 35 denotes a convex 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. Reference numeral 38 designates a plurality of ball insertion holes penetrating the side wall of the small inner diameter portion 33 above the bottom portion at equal intervals.

The height of the disassembled portion support cylinder 31 is such that the upper end portion thereof when installed in the frame 10 is substantially the same as the upper end portion of the vane plate 23 of the deflector 21 or is higher than it. The blade plate 23 and the disassembly support tube 3 are selected.
1 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.

45 is a balancer, as shown in FIG.
It is formed in a substantially V-shaped cross section with a high central portion and a low peripheral portion, and a through hole 46 is provided in the central portion. The outer diameter of the balancer 45 is equal to the large inner diameter portion 32 of the disassembling portion support cylinder 31.
Is formed to be approximately equal to or slightly smaller than the inner diameter of.

Reference numeral 47 is a disc spring, and as shown in FIG. 12, two leaf springs 48a and 48b having a V-shaped cross section are overlapped at their central portions in directions opposite to each other to form leaf springs 48a and 48b.
The rivet 50 is inserted into the holes 49a and 49b provided at the center of the rivet 50, and the rivet 50 is caulked and integrally joined. The outer diameter of the disc spring 47 is the same as the large inner diameter portion 32 of the disassembly portion support cylinder 31.
Is formed to be approximately equal to or slightly smaller than the inner diameter of.

Denoted at 51 is a disassembled portion retainer slidably accommodated in the small inner diameter portion 33 of the disassembled support cylinder 31. As shown in FIG. 13, an upper flange portion 52 and a lower flange portion 53 are provided on the outer periphery.
Is formed in a substantially cylindrical shape having a bottom and a recess 54 is formed between the upper and lower flange portions 52 and 53. Further, a substantially vertical contact surface 55 is provided on the outer periphery of the lower flange portion 53 via an inclined surface. Reference numeral 56 is an adjustment hole, and 58 is a set screw screwed into a screw hole 57 provided at the bottom.

Reference numeral 61 is a coil spring arranged in the disassembling portion retainer 51, 62 is a soluble alloy such as compression solder contained in the cylinder 41 of the heat sensitive portion 40, and 63 is a soluble alloy 62 in the cylinder 41. It is a piston that is slidable up and down, and a recess 64 is provided at the center of the upper surface.

Reference numeral 65 is a C ring interposed between the locking portion 37 provided on the convex portion 35 of the disassembling portion supporting cylinder 31 and the locking claw 43 of the heat sensitive portion 40, and 66 is a plurality of locks made of steel. It's a ball. The inner diameter of the ball hole 13 provided in the frame 10 is smaller than the outer diameter of the lock ball 66, and the inner diameter of the ball insertion hole 38 provided in the disassembly portion support cylinder 31 is smaller than the outer diameter of the lock ball 66. Largely formed.

Next, an example of the assembling order of the present embodiment, which comprises the above-mentioned respective parts, will be described. The deflector assembly 20 is preassembled. (1) The fusible alloy 62 and the piston 63 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 convex part 35 of the disassembly part support cylinder 31, attach the C ring 65 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 65.

(3) The disassembly section support cylinder 31 is erected, and the disassembly section retainer 51 is inserted into the disassembly section support cylinder 31 through the opening in the upper part. At this time, the setscrew 58 is raised to position the disassembly portion presser 51 below the ball insertion hole 38 of the disassembly portion support cylinder 31, and the tip end of the set screw 58 is recessed in the piston 63.
Contact 4

(4) Insert the lock balls 66 from the outside into the ball insertion holes 38 of the disassembled part support cylinder 31, respectively.
It is positioned between the ball insertion hole 38 and the recess 54 of the disassembly portion retainer 51. (5) The disassembly portion support cylinder 31 is inserted into the frame 10 from below the frame 10 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 of the disassembling part retainer 51, its tip is inserted into the adjustment hole 56, and the lock ball 66 is pushed to partially insert it into the ball hole 13 of the frame 10. Induce each.

(6) The set screw 58 is rotated to raise the disassembled portion presser 51, and the abutment surface 55 thereof is brought into contact with the lock ball 66 to press the lock ball 66 outward, so that the lock ball 66 is inserted into the ball hole of the frame 10. It is held between 13 and the disassembling part retainer 51. At this time, by looking through the ball hole 13, it can be confirmed from the outside whether or not the lock ball 66 is held at a predetermined position.

(7) A coil spring 61 is provided in the disassembly portion retainer 51.
Then, the deflector assembly 20 including the disc spring 47, the balancer 45 and the valve body 15 is inserted into the large inner diameter portion 32 of the disassembly portion support cylinder 31, and the protruding portion 18 of the valve body 15 attached to the deflector 21 is attached. Through hole 46 of balancer 45
Insert inside.

(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. As a result, the deflector assembly 20 including the disc spring 47, the balancer 45, and the valve body 15 is provided.
Is pressed against the coil spring 61, and the lower surface of the disc spring 47 contacts the step portion 34 of the disassembly portion support cylinder 31. Further, the main body 1 is screwed in until the leaf springs 48a, 48b of the disc spring 47 are substantially in close contact with each other, so that the disassembly portion support cylinder 31 is locked in that position, and the heat sensitive portion 40 is pressed down by the set screw 58. Locked and assembly is completed.

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 decomposition part support cylinder 31, fusible alloy 62,
The heat-sensitive decomposition section 60 is constituted by the heat-sensitive section 40 including the piston 63, the decomposition section retainer 51, and the coil spring 61. The inside of the disassembling part support cylinder 31 is covered by the disk-shaped balancer 45, and the inside thereof has a completely sealed structure, so that there is no risk of corrosion even when installed in a highly corrosive atmosphere. Further, the locking hole 29a of the stopper ring 28
˜29c are open to the outer circumference, and the connecting columns 24 are connected to this.
a to 24c are the inner wall of the frame 10 and the stopper ring 28.
And the locking claw 30 is located in the opening.
Since a and 30b are provided, the connecting columns 24a-24
c does not separate from the locking holes 29a to 29c.

In the flash type sprinkler head as described above, the valve body 15 seals the water outlet 2 of the main body 1 with an assembly load of about 50 kgf to prevent water leakage. It acts downward on the lock ball 66 via the part support cylinder 31. The lock ball 66 is pressed against the lower end of the ball hole 13 of the frame 10 by this load, and the reaction force F and the component force F as shown in FIG.
₁ occurs. In addition, since the balancer 45 is formed in a disc shape, the assembling load is surely and evenly applied.
Added to. For this reason, the lock ball 66 is always subjected to the force of trying to enter the inside (the disassembly portion pressing member 51 side). However, the lock ball 66 is not attached to the disassembly portion presser 51.
Since the movement is blocked by the abutment surface 55, the disassembly portion support cylinder 31 is held at that position and locked.

On the other hand, the fusible alloy 62 has lock balls 66.
Is in contact with only the contact surface 55, which is the vertical surface of the disassembly portion presser 51, the above-mentioned assembling load hardly acts, and only the pressing force (about 10 kgf) of the coil spring 61 is mainly applied. Unlike the flash type sprinkler, the load applied to the fusible alloy 62 does not fluctuate depending on the magnitude of the pressure of the fire extinguishing water, and the fusible alloy 62 does not cause a creep phenomenon.

The flash type sprinkler head configured as described above is inserted from a hole provided in the ceiling, and is attached to the ceiling surface by connecting the first screw portion 3 to the water supply pipe, and a part of the ceiling is attached to the ceiling surface. Exposed from the surface. The hole provided in the ceiling is closed by a sealing plate. Further, since the outer diameter of the frame 10 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 this embodiment will be described. FIG. 1 shows the case where the flash type sprinkler head mounted on the ceiling surface is in a warning state, and the water outlet 2 of the main body 1 is shown.
Is supplied with pressurized fire extinguishing water, and the valve body 15 is applied with the pressure of the extinguishing water. The closing force of the valve element 15 at this time is about 50 kgf, and the rolling force applied to the fusible alloy 62 is about 10 kgf.

When a fire occurs, the heat flow heats the heat-sensitive plates 42a and 42b, and the heat causes the fusible alloy 62 to be heated from the surroundings to start melting. The melted fusible alloy 62 is then melted into the cylinder 41 and the piston. It flows out from between 63, and its volume decreases as shown in FIG.

At this time, the disassembling section supporting cylinder 31 and the heat sensing section 40
Are connected to each other via a C-ring 65, and the tip end of the set screw 58 is thinly formed and pressed against the piston 63, so that the contact area between these is extremely small.
Therefore, the heat escaping from the heat sensitive portion 40 to the decomposition portion support cylinder 31 and the set screw 58 is very small, and most of the heat is added to the fusible alloy 62, so that the fusible alloy 62 melts in a short time.

When the fusible alloy 62 is melted and its volume is reduced, the decomposed portion retainer 51 is pressed down by the coil spring 61 and descends, as shown in FIG. As a result, the lock ball 66 disengages from the ball hole 13 of the frame 10 and rolls into the ball insertion hole 38 of the disassembling part support cylinder 31 and the recess 54 of the lock retainer 51, and the disassembly part support cylinder 31 is unlocked. It Then, the disassembled portion support cylinder 31 is pressed down by the disc spring 47, and descends using the blade plate 23 of the deflector 21 as a guide.

Further, as the melting of the fusible alloy 62 progresses, the disassembling part supporting cylinder 31 is pressed down by the disc spring 47 and descends.
As shown in FIG. 6, the lock ball 66 reaches almost the lower end of the frame 10. Then, when most of the fusible alloy 62 is melted, the lock ball 66 is disengaged from the lower end of the frame 10 as shown in FIG. 17, so that the thermosensitive decomposition portion 60, the disc spring 47, and the balancer 45 have their own weight and extinguishing water. The water pressure causes the frame 10 to drop rapidly, and as shown in FIG.
Breaks away and falls. At this time, the deflector 2
The height of the disassembling part support cylinder 31 is set so that the 1 can also descend while being guided by the disassembling part support cylinder 31.

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 is seated on the stepped portion 12 of the frame 10 and stopped. 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 disc spring 47 has the spring plates 48a, 4a.
Since two slabs 8b are stacked so that the sloak 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, and
As shown in FIG. 7, the valve body 15 is pressed against the cylindrical portion 6 to prevent water leakage until the lock ball 66 comes off from the lower end portion of the frame 10. This is to prevent the fusible alloy 62 from being cooled by water leaking from between the cylindrical portion 6 and the valve body 15 before the lock ball 66 comes off the frame 10. Further, since the ball insertion hole 38 of the disassembling part support cylinder 31 and the contact surface 55 of the disassembling part retainer 51 are in contact with the lock ball 66 on planes orthogonal to each other, the lock ball 66 is disassembled when disassembling the heat-sensitive disassembling part 60. It does not bite into the disassembly part presser 51 or the like. Further, since the outer diameter of the stopper ring 28 is formed slightly smaller than the inner diameter of the frame 10 and the inner diameter is formed slightly larger than the outer diameter of the cylindrical portion 6 of the main body 1, in the event of a fire, the deflector is deflected. The assembly 20 smoothly drops along the frame 10 and the cylindrical portion 6 of the main body 1.

In the above description, the three ball holes 13 are formed in the frame 10 and the disassembling 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. Further, although the case where the heat sensitive portion 40 is attached to the disassembly portion support cylinder 31 via the C ring 65 is shown, it may be attached by a screw or other means.

Example 2. FIG. 19 is a vertical sectional view of the second embodiment of the present invention, and FIG. 20 is an exploded perspective view thereof. The parts having the same functions as those in the first embodiment are designated by the same reference numerals. In the figure, reference numeral 1 denotes a main body having a water discharge port 2 penetrating the center thereof, a screw portion 3 connected to a water supply pipe is provided on an upper surface of a flange 4, and a female screw 5a is provided in a concave portion formed on the lower surface. Is provided.

As shown in FIG. 21, a cylindrical frame 10 has a male screw 11a which is screwed into the female screw 5a of the main body 1 as shown in FIG. Slits 14c and 14d for locking the arms are provided, and bottom plates 13a and 13b having a smaller diameter than the inner wall are provided at the lower end portion.
Are provided so as to face each other, and a substantially gavel-shaped opening 13c is formed. 13d, 13e and 13f are bottom plates 13a and 1
3b is a guide hole that opens in the opening 13c and guides a connecting column to be described later, and 12a is a stepped portion provided on the outer periphery of the lower end.

Reference numeral 15 denotes a valve body having a substantially convex cross section that closes the water discharge port 2 of the main body 1, and has a projecting portion 18 provided at the center of the lower surface, and the outer periphery of the projecting portion 18 is concentric therewith. A caulking piece 19 is provided so as to project. 16a is a packing made of, for example, tetrafluoride resin and covering the upper surface of the valve body 15. The valve body 15 is formed to be larger than the minor axis side of the opening of the deflector described later.

Reference numeral 70 denotes an arm guide, which is a rectangular top plate 71.
And a side wall 72 bent downward from the edge of the long side thereof
It is formed in a U shape by a and 72b, and the top plate 71
The caulking piece 19 of the valve body 15 is fitted into the hole 72 provided in the and caulked, and the both are integrally coupled.

Reference numeral 45 designates side walls 72a, 7 of the arm guide 70.
Balancer inserted between 2b and rectangular top plate 45a
And leg portions 45b, 45c, 45d, 45e formed by bending downward from the edge portion on the long side thereof, and leg portions 45b, 45.
c and 45d and 45e, respectively, and side walls 45f and 45g having an inverted triangular shape formed respectively.
The protruding portion 18 of the valve body 15 is provided in the recess 46 provided in the central portion of a.
Abut.

Reference numeral 75 denotes side walls 72a, 7 of the arm guide 70.
In the link mechanism inserted between 2b, the upper part is bent outward and has a locking part 77 at the tip, and a pair of arms 76a and 76b arranged opposite to each other and both ends are bifurcated. Is bent diagonally downward, and the forked parts are arms 76a, 76
The arm support plate 80 is loosely fitted to the b and locked on the upper surface of the stepped portion 78, a cylinder 81 placed on the arm support plate 80, and, for example, compression solder, and is housed in the cylinder 81. A ring-shaped fusible alloy 82,
A piston column 83 having a disc-shaped piston 84 in the substantially central portion and threaded portions 85 and 86 provided in the upper and lower ends, and a piston hole 83 formed in the central portion with both ends formed in a fork The threaded portion 85 of the pillar 83 is screwed into the forked portion of the arm 7.
6a, 76b, and a link holding plate 87 that comes into contact with the lower surface of the shoulder 79, and the lower part of the piston column 83 has holes 81a, 80 provided in the cylinder 81 and arm support plate 80.
It is loosely fitted in a and projects downward.

20 is a deflector 21 and connecting columns 24a, 2
The deflector assembly consisting of 4b, 24c and the stopper ring 28 is shown in detail in FIGS. 22 and 23.
As shown in FIG. 22, the deflector 21 is a disk-shaped substrate 2
A plurality of vane plates 23 are formed by bending the outer periphery of 2 upward, and the substrate 22 is provided with a substantially oval opening 26a. The length of the opening 26a on the major axis side is the arm. The guide 45 is formed to be substantially equal to or slightly longer than the length of the top plate 45a, and the width on the minor axis side is formed to be slightly wider than the width of the top plate 45a. Reference numerals 22a, 22b, and 22c are screw holes for mounting a connection column, which will be described later, provided on the substrate 22. The outer diameter of the deflector 21 is formed to be substantially the same as the outer shape of the frame 10.

As shown in FIG. 23, the connecting columns 24a to 24c have a rectangular cross section and have screw holes 22a to 22a formed in the substrate 22.
22c, a threaded portion 25 screwed into the threaded portion 22c, and a fitting portion (intermediate portion) having a thickness substantially equal to the outer shape of the threaded portion 25
25a, a press-fitting part (upper part) wider than the fitting part 25a
25b and a locking portion 25c wider than the press-fitting portion 25b. The stopper ring 28 is the first embodiment (FIG. 6).
The outer diameter is slightly smaller than the inner diameter of the frame 10 and larger than the inner diameters of the bottom plates 13a and 13b provided at the lower end of the frame 10, and the inner diameter is smaller than that of the valve. It is formed slightly larger than the outer diameter of the body 15. Reference numeral 90 is a protective cover of the link mechanism 75 which also serves as a heat sensitive plate, and 91 is a heat sensitive plate having a screw portion 92 at the center.

Next, an example of the assembling order of the present embodiment, which comprises the above-mentioned respective parts, will be described. The link mechanism 75 is preassembled. (1) First, the screw holes 22a to 22c of the deflector 21
Then, the threaded portions 25 of the connection columns 24a to 24c are respectively screwed and fixed. At this time, the screw portion 25 is attached to the deflector 21.
You may make it protrude from the lower surface of and crimp.

(2) Next, the opening 2 of the deflector 21
6a, the side walls 72a and 72b of the arm guide 70 to which the valve body 15 is attached are inserted, and the valve body 15 is attached to the deflector 21.
Sit on the substrate 22 of. (3) Then, the connecting column 2 fixedly installed upright on the deflector 21.
4a to 24c through the guide holes 13d to 13f of the frame 10
Along with the frame 1
0 or the upper opening of the frame 10 in the stopper ring 2
8 is inclined and inserted, and the fitting portions 25a of the connecting columns 24a to 24c are inserted into the locking holes 29a to 29c from between the locking claws 30a and 30b, respectively.

(4) Then, by pulling the stopper ring 28 upward while keeping it substantially horizontal, the connecting columns 24a to 24a
The press-fitting portion of c is press-fitted into the locking holes 29a to 29c, and the upper surface hits the locking portion 25c and stops. As a result, the stopper ring 28 is fixed to the press-fitting portion 25c of the connecting columns 24a to 24c, and the deflector assembly 20 including the deflector 21, the connecting columns 24a to 24c, and the stopper ring 28 is formed.
The assembly of is completed.

(5) Next, the female screw 5a of the main body 1 is loosely screwed to the male screw 11a of the frame 10, and then the link mechanism 75 is inserted from below to bring the tops of the arms 76a and 76b into contact with the balancer 45. At the same time, the locking portions 77 are locked to the slits 14c and 14d of the frame 10, respectively,
The main body 1 is firmly screwed into the frame 10 to be fixed. At this time, the arms 76a and 76b are given a rotational force directed outwards with respect to the tops of the arms, and the rotational force is blocked by the arm support plate 80. The upper end of the vane plate 23 of the deflector 21 is in contact with the stepped portion 12a of the frame 10, and the lower part of the link mechanism 75, the protective cover 90, the heat sensitive plate 91, and the side wall 72 of the arm guide 70.
The lower portions of a and 72b project downward from the opening 26a of the deflector 21.

Finally, the hole provided in the central portion of the protective cover 90 is fitted into the thread portion 86 of the piston column 83 of the link mechanism 75, and the thread portion 92 of the heat sensitive plate 91 is screwed into the thread portion 86 of the piston column 83. Once fixed, the assembly of the flash type sprinkler head according to the present embodiment is completed.

In the flash type sprinkler head as described above, when a fire occurs, the heat sensitive plate 91 and the protective cover 90 are heated by the hot air flow, the fusible alloy 62 is heated and melted, and a part of it is discharged from the cylinder 81. leak. As a result, the cylinder 81 and the arm support plate 80 rise, and both arms 76a and 76b rotate outward with their apexes as fulcrums. Therefore, the link mechanism 75 is disassembled, and the link mechanism 75 and the balancer 45 fall outside through the openings 13c and 26a of the frame 10 and the deflector 21.

At the same time, the side wall 72a, 72b of the arm guide 70 of the valve body 15 falls along the edge of the opening 26a provided in the base plate 22 of the deflector 21 due to its own weight and the water pressure of the fire extinguishing water, and the base plate 22 of the deflector 21. It sits on the top and closes the opening 26a of the deflector 21. As a result, the deflector 21 also drops, and the stopper ring 28 sits on the bottom plates 13a, 13b of the frame 10 and stops. The state at this time is shown in FIG. Fire extinguishing water is ejected from the water discharge port 2 opened by the fall of the valve body 15 and sprayed in all directions by the deflector 21 to extinguish the fire.

Example 3. FIG. 25 is a plan view of a stopper ring which constitutes a deflector assembly which is an essential part of a third embodiment of the present invention, and FIG. 26 is a front view and a plan view of the same connecting column. In this embodiment, the deflector 21 (FIG. 22) of the second embodiment is used as it is, but the connecting columns 24d, 24e, 24f are formed in a cylindrical shape as shown in FIG. 25, fitting portion (intermediate portion) 25a,
The press-fitting portion (upper part) 25b and the locking portion 25c are formed in this order in order of larger diameter. In addition, at positions corresponding to the connecting columns 24d-24f of the stopper ring 28, the connecting columns 24d-
Circular locking hole 29 into which the press-fitting portion 25b of 24d is press-fitted
d, 29e, 29f are provided, and the fitting portions 2 of the connecting columns 24d-4df are provided on the outer peripheral side thereof by the locking claws 30a, 30b.
An opening is provided in which 5a is inserted.

Also in the present embodiment having the above-mentioned structure, the screw portion 25 is screwed into the screw holes 22a to 22a of the deflector 21.
It is screwed into c to stand and is fixed, and its fitting portion 25a is inserted between the locking claws 30 and 30b of the stopper ring 28 in the locking hole 29d.
Fit into ~ 29f. And the upper surface is the connection pillars 24d-2.
When the deflector 28 is pulled up until it hits the locking portion 25c of 4f, the press-fitting portions 25b of the connecting columns 24d-24f are pressed into the locking holes 29d-29f of the stopper ring 28, and the stopper ring 28 is held and fixed in that position. It In addition, the screw portions 25 of the connecting columns 24d to 24f are inserted into the locking holes 29d to 29f of the stopper ring 28 from above and screwed into the screw holes 22a to 22c of the deflector 28, and then the stopper ring 28 is pulled up and connected. The press-fitting portions 25b of the columns 24d to 24f may be press-fitted into the locking holes 29d to 29f.

In each of the above embodiments, the connecting columns 24a to 24a.
Although the case where three c and 24d to 24f are provided is shown, the number is not limited to three and may be two or more. Further, the structure of the heat-sensitive decomposition portion and other components are not limited to those in the above-mentioned embodiments, and can be changed as appropriate. 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.

[0063]

As described above in detail, according to the present invention,
The following effects can be obtained. (1) The connecting pillar is formed such that the middle portion is thin, the upper portion is larger than the middle portion, and the upper end portion is larger than the upper portion, and the upper portion of the connecting pillar is press fit into the stopper ring in correspondence with the connecting pillar. Stop holes are provided, and openings are formed on the outer peripheral side of these locking holes that are large enough for the intermediate parts of the connecting columns to fit in. Insert the intermediate parts of the connecting columns into the locking holes from this opening, and then use the stopper ring. Since the deflector assembly is constructed by pulling up and press-fitting the upper part of the connecting column into the locking hole, welding and caulking work are not required at the time of assembly, and the assembly work is extremely easy and the cost can be reduced. In addition, since two or more connecting columns can be appropriately provided, they have excellent strength and can operate smoothly and reliably regardless of the installation posture.

(2) Since the connecting pillar is formed integrally with the deflector by extending the vane plate of the deflector, it is extremely easy to manufacture and has a large mechanical strength.

(3) A screw is provided at the lower end of the connecting column, and a screw hole into which the screw is screwed is provided in the deflector.
Since the connecting column is erected by screwing a screw into this screw hole, it is extremely easy to manufacture, and the outside diameter of the deflector is larger than that of the connecting column that is integrally formed with the deflector and the blade. Can be large. (4) Since the connecting column of (3) above is formed to have a rectangular cross section or a circular cross section, it is easy to manufacture.

[Brief description of drawings]

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

FIG. 2 is a front 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 front view and (c) is a bottom view.

5A and 5B show the deflector of FIG. 1, in which FIG. 5A is a development view, FIG. 5B is a plan view, and FIG. 5C is a front view.

6A and 6B show the stopper ring of FIG. 1, where FIG. 6A is a plan view and FIG. 6B is a front view.

FIG. 7 is an explanatory view showing a procedure for assembling the deflector assembly.

FIG. 8 is an explanatory view showing a procedure for assembling the deflector assembly.

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

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

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

12 is a vertical cross-sectional view of the disc spring of FIG.

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

FIG. 14 is an explanatory view of the operation of the lock ball shown in FIG.

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

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

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

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

FIG. 19 is a vertical cross-sectional view of the second embodiment of the present invention.

FIG. 20 is an exploded perspective view of FIG.

FIG. 21 shows the frame of FIG. 19, (a) is a plan view, and (b) is a longitudinal sectional view.

22 is a plan view of the deflector of FIG. 19. FIG.

23 is a front view and a side view of the connecting column of FIG. 19. FIG.

FIG. 24 is an explanatory view of the operation of the second embodiment.

FIG. 25 is a plan view of a stopper ring forming a main part of the third embodiment of the present invention.

26A and 26B are a plan view and a front view of a connecting column which is a main part of a third embodiment of the present invention.

[Explanation of symbols]

1 body 2 water outlet 10 frames 13 ball holes 14a-14d slit 15 valve body 20 Deflector assembly 21 deflector 22 Substrate 23 blades 24a to 24f Connection pillar 25 screw part 25a Fitting part (intermediate part) 25b Press-fitting part (upper part) 25c locking part 28 Stopper ring 29a to 29f Locking hole 30a, 30b Locking claw 31 Disassembly section support tube 38 Ball insertion hole 40 heat sensitive part 45 Balancer 47 Belleville 51 Disassembly unit presser 60 Thermal decomposition part 62 Soluble alloy 70 Arm guide 75 Link mechanism

Claims (3)

(57) [Claims] 1. A flash type sprinkler head comprising a deflector having a plurality of connecting columns, and a deflector assembly comprising a stopper ring attached to the upper portions of the connecting columns, wherein the connecting column has a thin intermediate portion and an upper portion. The stopper ring is formed to have a larger size than the middle part and an upper end part to be larger than the upper part, and the stopper ring is provided with a locking hole having a size corresponding to the connecting column so that the upper part of the connecting column can be press-fitted. An opening having a size into which the intermediate portion of the connecting column can be fitted is provided on the outer peripheral side or the inner peripheral side of the hole, and the intermediate portion of the connecting column is inserted into the locking hole from the opening, and the stopper ring is inserted. The sprinkler head of the flash type is characterized in that the upper part of the connecting column is press-fitted into the locking hole by pulling up. 2. The flash type sprinkler head according to claim 1, wherein the connecting column is formed by extending a vane plate of the deflector. 3. A screw is provided at the lower end of the connecting column,
The flood type sprinkler head according to claim 1, wherein the deflector is provided with a screw hole into which the screw is screwed.