JPH08131575A - Sprinkler head - Google Patents

Abstract

PURPOSE: To provide a sprinkler head capable of drastically decreasing its outside diameter, to be reliably operated, easily manufactured, and excellent in design. CONSTITUTION: A cylindrical frame 10 provided a step part 12 on the lower part inner peripheral surface, a disassemble part supporting cylinder 31 slidably arranged in the frame 10, and provided with a plurality of ball insertion holes on the side wall, and a plurality of lock balls 66 projecting from the ball insertion holes of the disassemble part supporting cylinder 31, and for preventing the disassemble part supporting cylinder 31 from being separated from the frame 10 are provided. Moreover, a disassemble part presser 51 slidably arranged in the disassemble part supporting cylinder 31, and for holding the state where the lock balls 66 project from the ball insertion holes of the disassemble part supporting cylinder 31 and a fusible alloy 62 provided under the disassemble part presser 51, and to be fused by heat in case of fire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head, and more particularly to a heat-decomposable portion thereof.

[0002]

2. Description of the Related Art As an example of a conventional 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 attached to 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 sprinkler head as described above is highly reliable because of its reliable operation in the event of 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 width between the T-bars is formed narrow (about 25 mm) in the system ceiling, and the sprinkler head as described above is a pair of inverted J-shapes. Since the lever is used, it is impossible to make the inner diameter of the frame smaller than the width of the arms arranged opposite to each other, and there is a limit to the miniaturization of the outer diameter. 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 it is possible to make the outer diameter extremely small, and moreover, the operation is reliable and the manufacture is easy, and the sprinkler is excellent in design. The purpose is to obtain the head.

[0006]

[Means for Solving the Problems]

(1) The sprinkler head according to the present invention has a cylindrical frame having a step portion on the lower inner peripheral surface and a plurality of ball insertion holes on the side wall, and is disassembled slidably arranged in the frame. And a plurality of lock balls that slightly project from the ball insertion holes of the disassembling part supporting cylinder to prevent the disassembling part supporting cylinder from coming off the frame, and are slidably disposed in the disassembling part supporting cylinder. , A disassembly portion retainer that holds the lock ball in a state of protruding from the ball insertion hole of the disassembly portion support cylinder, and a fusible alloy that is provided below the disassembly portion retainer and melts by heat during a fire. .

(2) A step portion is provided on the inner peripheral surface of the disassembling portion support cylinder of the above (1), and a substantially disk-shaped balancer is placed on this step portion. (3) A disc spring is provided between the stepped portion (2) and the balancer.

(4) The contact surfaces of the disassembled part support cylinder and the disassembled part retainer of the above (1) and the lock balls are formed by planes orthogonal to each other. (5) A Koly spring for urging the disassembly portion presser is provided in the disassembly portion presser of (1).

(6) An adjustment hole for inserting a jig is provided in the disassembled portion retainer of the above (1). (7) The frame of (1) above is provided with a hole for confirming a lock ball.

[0010]

[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.

When the fusible alloy melts and its volume decreases, the decomposed portion presser is pressed down by the coil spring and descends. As a result, the lock ball disengages from the ball hole in the frame and moves into 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 disassembly section support tube becomes a disc spring. It is pressed down and descends using the deflector blades as guides. The heat-decomposition part 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 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. At this time, the deflector also descends while being guided by the disassembling part support cylinder.

[0012]

【Example】

Example 1. 1 is a vertical sectional view of a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. In the figure, reference numeral 1 is a main body having a water discharge port 2 penetrating the center thereof, and a first screw portion 3 connected to a water supply pipe is provided on the upper surface of a flange 4.
A second screw portion 5 into which a frame 10 described later is screwed is provided on the lower surface of the flange 4, and a cylindrical portion 6 having a diameter smaller than that of the second screw portion 5 is projectingly provided at the 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 (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 denotes a valve body for sealing the water discharge port 2 of the main body 1, which is a substrate having an outer diameter substantially equal to the outer diameter of the cylindrical portion 6 of the main body 1,
A head protruding from the upper surface of the substrate and inserted into the water outlet 2 of the main body 1, a protrusion protruding from the center of the lower surface of the substrate, and a caulking piece concentrically provided on the lower surface of the substrate. It consists of Reference numeral 16 is a gasket fitted on the head and installed on the substrate, for example, made of tetrafluororesin.

Reference numeral 20 denotes a deflector assembly. The deflector 21 is provided with a plurality of blades 22 radially protruding at substantially equal intervals on the outer periphery of a disk-shaped substrate, and the blades 22 have equal intervals (for example, 120 ° intervals). The plurality of blades 22 in the position of are further extended to connect the connecting columns 23a, 23b, 23.
c is formed. The blades 2 of the connecting columns 23a to 23c
A fitting portion that is narrower than the width of the blade 22 is formed at a portion subsequent to 2, and a press-fitting portion that is wider than the fitting portion is formed at the tip thereof, and a locking portion that is wider than the press-fitting portion is formed at the tip portion. Is provided. A through hole is provided in the center of the disk-shaped substrate.

The above-mentioned blades 22 are bent upward and each deflector 21 has a water spray port 24 between the blades 22.
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. 25
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 of which is smaller than the inner diameter of the frame 10 and which is sized to engage with the step portion 12 when descending. ing. In addition, the connecting column 2 of the deflector 21
Corresponding to 3a-23c (hence at 120 ° intervals)
Locking holes 26a, 26b, and 26c are provided, and the locking holes 26a to 26c are opened to the outer circumference through locking claws. The widths of the locking holes 26a to 26c are substantially equal to or slightly narrower than the widths of the press-fitting portions of the connecting columns 23a to 23c of the deflector 21, and therefore are formed to be narrower than the width of the locking portion. The width between them is formed to be substantially equal to the width of the fitting portions of the connecting columns 23a to 23c.

In order to assemble the deflector assembly 20 including the deflector 21 and the stopper ring 25 as described above, first, the caulking piece of the valve body 15 is inserted into the through hole provided at the center of the deflector 21, and the valve body is caulked. 15 and the deflector 21 are integrally connected. Then, the fitting portions of the connecting columns 23a to 23c of the deflector 21 are fitted into the locking holes 26a to 26c from between the locking claws of the stopper ring 25, respectively, and the stopper ring 25 is pulled upward to raise the upper surface of the connecting column 23a. 23 to 23c. At this time, the connecting columns 23a-23 are provided in the locking holes 26a-26c.
The press-fitting portion c is press-fitted, and the stopper ring 25 is held at that position. The stopper ring 25 can be held more reliably by caulking the locking claws.

Reference numeral 31 denotes a disassembled portion support cylinder having a substantially bottomed cylindrical shape slidably disposed in the frame 10. As shown in FIG. 3, the inside diameter of the upper portion 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 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. 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 disassembling part support cylinder 31 is selected so that the upper end of the disassembled part support cylinder 31 is substantially aligned with the upper end of the vane 22 of the deflector 21 or is higher than the upper end of the deflector 21 when assembled in the frame 10. The blades 22 and the disassembly support cylinder 31 act so as to guide each other.

As shown in FIG. 4, a heat sensitive portion 40 is a cylinder 41 having a bottomed cylindrical shape, and disc shaped heat sensitive plates 42a, 42b provided on the lower surface and the outer wall of the substantially central portion in the height direction.
And the disassembling part supporting cylinder 3 at the upper end of the cylinder 41.
Flange-like locking claw 43 with an outer diameter that can be inserted into the hole 36
Is provided. The number of heat sensitive plates 42a and 42b may be one, or three or more may be provided.

As shown in FIG. 5, reference numeral 45 denotes a balancer, which is formed in a substantially V-shaped cross section having 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 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 disc spring, and as shown in FIG. 6, two leaf springs 48a and 48b having a V-shaped cross section are brought into contact with each other at their center portions so as to be in opposite directions to each other.
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 slightly smaller than the inner diameter of the.

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. 7, 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 disassembly 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 a locking portion 37 provided in the recess 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 lock balls made of steel. Is. 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 including the above-mentioned respective parts will be described. (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 recess 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 presser 51 is inserted into the disassembly section support cylinder 31 from the upper opening. 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,
Insert the lock ball 66 into the ball insertion hole 38 and the disassembly portion retainer 51.
Between the concave portions 54 and. (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 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 and pressed outward, so that a part of the lock ball 66 is pushed to the frame 10. Disassembly part retainer 5 by protruding into the ball hole 13 of
1 to lock the disassembly unit support cylinder 31 in that position. In addition, the heat sensitive portion 4 is fixed by the set screw 58.
0 is rolled down and locked. At this time, the ball hole 13
From outside, it is 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.
, The disc spring 47, the balancer 45, and the deflector assembly 20 are inserted into the large inner diameter portion 32 of the disassembling portion support cylinder 31, and the protruding portion 18 of the valve body 15 attached to the deflector 21 is inserted into the through hole of the balancer 45. Insert in 46.

(8) The cylindrical portion 6 of the main body 1 is inserted into the stopper ring 25, and its tip end is brought into contact with the upper surface of the substrate of the valve body 15 (the gasket 16 is mounted on the upper surface of the substrate) to The screw part 5 of 2 is screwed into the female screw part 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 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, and the assembly is completed. At this time, the lower parts of the heat-sensitive part 40 and the disassembling part support cylinder 31 project outward from the lower end of the frame 10. In addition, the disassembling part support cylinder 31, the soluble alloy 62, the heat sensitive part 40 including the piston 63, and the disassembling part retainer 5 described above.
1 and the coil spring 61 constitute a heat-sensitive decomposition section 60. The inside of the disassembling part support cylinder 31 is a disk-shaped balancer 4.
Since it is covered with 5, the inside has a completely sealed structure, so there is no risk of corrosion even when installed in a highly corrosive atmosphere.

By the way, in the sprinkler head as described above, the valve body 15 is used to control the water discharge port 2 of the main body 1 by 50.
Sealing is performed with an assembling load of about kgf to prevent water leakage, and this assembling load acts downward on the lock ball 66 via the disassembly portion 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 a force F and a component force F ₁ as shown in FIG. 8 are generated. Since the balancer 45 is formed in a disk shape, the assembling load is applied to the lock ball 66 reliably and uniformly.
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, since the lock ball 66 is prevented from moving by the abutment surface 55 of the disassembling part retainer 51, it is held at that position and locks the disassembling part supporting cylinder 31.

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 assembly load hardly acts, and only the pressing force (about 10 kgf) of the coil spring 61 is mainly applied. Unlike the head, the load applied to the fusible alloy 62 does not change depending on the water pressure of the fire extinguishing water, and the fusible alloy 62 does not creep even if a large water pressure acts on the valve element 15.

The sprinkler head constructed as described above is inserted through the hole provided in the ceiling, and the first screw portion 3 of the sprinkler head 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 63 is 1
It is about 0 kgf.

Now, when a fire occurs, the heat sensitive plates 42a and 42b are heated by the hot air flow, the fusible alloy 62 is heated from the surroundings by the heat and begins to melt, and the melted fusible alloy 62 is 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 sensitive 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 is disengaged from the ball hole 13 of the frame 10 and moved into the ball insertion hole 38 of the disassembly unit support cylinder 31 and the recess 54 of the lock retainer 51, and the disassembly unit support cylinder 31 is unlocked. . Then, the disassembled portion support cylinder 31 is also pressed down by the disc spring 47, and descends using the blades 22 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 0, the lock ball 66 reaches almost the lower end of the frame 10. When most of the fusible alloy 62 is melted, the lock ball 66 is disengaged from the lower end portion of the frame 10 as shown in FIG. 11, 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 21
So that the disassembling part support cylinder 31 can be used as a guide to descend.
The height of the disassembly unit support cylinder 31 is set.

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 25 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 disc spring 47 has the spring plates 48a, 4a.
Since two strokes 8b are overlapped so that the stroke becomes long, it is possible to promote the disengagement of the disassembly portion support cylinder 31 from the frame 10 in the event of a fire, and as shown in FIG. The valve body 15 can be pressed against the lower surface of the cylindrical portion 6 of the main body 1 until 66 comes off from the lower end portion of the frame 10 to prevent water leakage. This is to prevent the fusible alloy 62 from being cooled by water leaking from between the cylindrical portion 6 of the main body 1 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.

Example 2. FIG. 13 is a vertical cross-sectional view of the second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Although 10 is a frame having substantially the same structure as the frame 10 of the first embodiment,
The ball hole 13 is not provided.

Reference numeral 71 is a substantially cylindrical disassembling part supporting cylinder, which is shown in FIG.
As shown in FIG. 4, the upper portion of the side wall is thin and has a large inner diameter portion 72.
Is formed, and the lower portion is reduced in diameter to become a thick small inner diameter portion 73, and below the large inner diameter portion 72, a step portion 74 (flange portion) having substantially the same inner diameter as the small inner diameter portion 73 is provided. 73
A concave portion 75 is formed between the step portion 74 and the step portion 74. 76
Is a ball insertion hole penetrating the side wall in the recess 75, the inner diameter of which is smaller than the outer diameter of the lock ball 66. Reference numeral 77 is a flange-shaped locking portion provided on the inner wall of the lower end portion.

Reference numeral 78 is a heat-sensitive portion, and as shown in FIG. 15, a flange 80 is provided on the outer periphery of the upper end of the cylinder 79 for engaging with the engaging portion 77 of the disassembling portion supporting cylinder 71, and below it. Heat sensitive plates 81a and 81b are provided.

Reference numeral 82 denotes a disassembled portion retainer, which is formed in a substantially convex shape in cross section by a large diameter portion 83 and a small diameter portion 84 each having a truncated cone shape, as shown in FIG. The outer diameter of the lower end portion of the inclined surface 85 is formed to be slightly smaller than the inner diameter of the small inner diameter portion 73 of the disassembling portion support cylinder 71. 87 is a set screw screwed into a screw hole 86 provided at the center.

Next, an example of the assembling order of the present embodiment including the above-mentioned respective parts will be described. (1) Soluble alloy 62 and piston 63 in the cylinder 79
The heat-sensitive part 78 in which is inserted is inserted into the disassembly part support cylinder 71 from the upper opening, and the flange 80 is inserted into the disassembly part support cylinder 7.
1 is placed on the locking portion 77.

(2) Raise the setscrew 87 to insert the disassembly section presser 82 into the disassembly section support cylinder 71 through the upper opening,
It is located below the small inner diameter portion 73. At this time, the tip of the set screw 87 contacts the piston 63. (3) The lock ball 66 is inserted into the recess 75 of the disassembly portion support cylinder 71.
Inserted into the inside and rotating the set screw 87, the disassembly presser 82 is raised to cause a part of the lock ball 66 to protrude from the ball insertion hole 76, and the lock ball 66 is placed between the disassembled part presser 82 and the inclined surface 85. Hold. At this time, the heat sensitive portion 78 is pressed down and locked by the set screw 87.

(3) The disc spring 47 is inserted into the large inner diameter portion 72 of the disassembling portion support cylinder 71 and placed on the step portion 74, and the balancer 45 and the deflector assembly 20 are placed thereon. Then, the disassembly portion support cylinder 71 is inserted into the frame 10 through the upper opening portion of the frame 10.

(4) Next, the cylindrical portion 6 of the main body 1 is inserted into the stopper ring 25, and the second screw portion 5 thereof is screwed into the female screw portion 11 of the frame 10, so that both leaf springs 4 of the disc spring 47 are inserted.
The assembly is completed by screwing the parts 8a and 48b into a state in which they are in close contact with each other. At this time, the heat sensitive portion 78 and the lower portion of the disassembly portion support cylinder 71 project outward from the lower end portion of the frame 10, and the lock ball 66 is pressed down by the disassembly portion support cylinder 71 and brought into pressure contact with the step portion 12 of the frame 10. In addition, the inclined surface 85 provided on the side wall of the disassembling part retainer 82 holds the space between the frame 10 and the disassembling part retainer 82 in the recess 75 of the disassembling part supporting cylinder 71 and the ball insertion hole 76 by the wedge action, and disassembles the supporting cylinder 71. Lock.

In this case, as in the case of the first embodiment,
The lock ball 66 is acted on by a force that tries to enter the inside (on the side of the disassembly portion retainer 82). In addition, the heat-sensitive part 78 including the above-mentioned disassembly part support cylinder 71, the soluble alloy 62, and the piston 63.
The heat-decomposing portion 70 is constituted by the decomposing portion holder 82 and the inside of the heat-decomposing portion 70 is hermetically sealed as in the case of the first embodiment.

Now, when a fire occurs and the fusible alloy 62 melts and flows out from between the cylinder 79 and the piston 63 and its volume decreases, as the piston 63 descends, the disassembling part retainer 82 and the lock ball 66 also. Then, the lock ball 66 is pushed down to descend from the ball insertion hole 76 through the disassembly portion support cylinder 71.
Move in. As a result, the disassembly unit support cylinder 71 is unlocked, and the heat-decomposition unit 70, the disc spring 47, and the balancer 45 are rapidly lowered by their own weight and the water pressure of the fire extinguishing water, and are separated from the frame 10 and fall.

At the same time, the deflector assembly 20 including the valve body 15 also falls due to the water pressure of the fire extinguishing water, and the stopper ring 25 is seated on the stepped portion 12 of the frame 10 and stopped. At this time, the deflector 21 is located below the frame 10. As a result, the water outlet 2 of the main body 1 is opened,
Fire extinguishing water is sprayed from the deflector 21 to extinguish the fire.

Example 3. FIG. 17 is a vertical sectional view of a third embodiment of the present invention, and FIG. 18 is an external view thereof. The first,
The same parts as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted. In the figure, reference numeral 1a denotes a main body, a water discharge port 2 is provided therethrough, a male screw portion 3 is provided on an upper surface of a flange 4, and a cylindrical portion 6 is provided at a central portion of a lower surface. Four
Reference numeral a is a concave groove provided concentrically with the outer periphery of the cylindrical portion 6 on the flange 4, and a female screw portion 5a is provided on the inner surface of the outer peripheral wall thereof.

Reference numeral 10a designates a substantially cylindrical frame, and the outer periphery of the upper portion thereof is a male screw portion 1 screwed to a female screw portion 5a of the main body 1a.
1a is provided, and an inclined surface 12a is formed on the inner peripheral wall of the stepped portion 12 provided at the lower end. 14a, 14b
Is a slit provided along the outer periphery above the step portion 12 and plays the same role as the slits 14a and 14b in the first embodiment, but it may not be provided in particular.

As shown in FIG. 19, a disassembled portion support cylinder 91 is formed by integrally forming a bottomed cylindrical main body portion 92 and a heat sensitive portion 95, and a step portion 93 is provided at an upper end portion of the main body portion 92. Further, the side wall is provided with a plurality of ball insertion holes 94 each having an inner diameter (small diameter side) smaller than the outer diameter of the lock ball 66 and a taper hole having a small outer diameter on the outer peripheral side.
Incidentally, 94a is provided to face the ball insertion hole 94,
This is a hole into which a cutting tool is inserted when processing the ball insertion hole 94. The cylinder 96 that constitutes the heat-sensitive section 95 is a main body section 9.
2 has an opening at the bottom, and heat-sensitive plates 97a, 97 on the outer wall.
b is provided.

Reference numeral 98 is a substantially trapezoidal presser for the disassembled portion, which is shown in FIG.
As shown in, the outer diameter of the lower end portion is formed to be slightly smaller than the inner diameter of the main body portion 92 of the disassembling portion support cylinder 91, and an inclined surface 100 is provided on the outer periphery of the lower portion. A set screw 102 is screwed into a threaded portion 101 provided at the center. Reference numeral 45a is a balancer having a bulge in the center thereof, and is formed in such a size that it can be fitted into the step portion 93 provided in the main body portion 92 of the disassembling portion support cylinder 91.

Next, an example of the assembling order of the present embodiment including the above-mentioned respective parts will be described. (1) The soluble alloy 6 is placed in the cylinder 96 of the disassembling part support cylinder 91.
2 and pistunto 63 are inserted, and then the disassembly section support cylinder 91
The disassembly portion presser 98 is inserted therein and held in the state of FIG. At this time, the set screw 102 contacts the piston 63. (2) In this state, the disassembling part support cylinder 91 is inserted into the frame 10a from below the frame 10a, and the disassembling part support cylinder 91 is inserted.
The lock balls 66 are inserted from the upper openings of the above-mentioned and inserted into the ball insertion holes 94 of the disassembling portion support cylinder 91, respectively. Then, the set screw 102 is rotated to adjust the position of the disassembling part presser 98, and then the balancer 4 is attached to the step part 93 of the disassembling part support cylinder 91.
5a is fitted, then the deflector assembly 20 is inserted from the upper opening of the frame 10a, and the valve body 15 is placed on the balancer 45a.

(3) The cylindrical portion 6 of the main body 1a is inserted into the stopper ring 25 of the deflector assembly 20, and the female screw portion 5a thereof is screwed into the male screw portion 11a of the frame 10a. As a result, the valve body 15 and the balancer 45a are pressed down by the cylindrical portion 6 of the main body 1a, the disassembling portion support cylinder 91 in which the balancer 45a is fitted is lowered, and the lock ball 66.
Hits the inclined surface 12a of the stepped portion 12 of the frame 10a and stops. At this time, the lower portion of the disassembly portion support cylinder 91 and the heat-sensitive portion 95 project from the lower end portion of the frame 10a.

(4) As a result, the lock ball 66 is held in the ball insertion hole 94 of the disassembly portion support cylinder 91 by the inclined surface 12a of the frame 10a, the upper surface of the ball insertion hole 94 and the inclined surface 100 of the disassembly portion presser 98. , Disassembling part support cylinder 9
Lock 1 in that position. At this time, the lock ball 6
A force for moving the lock ball 66 into the disassembly portion support cylinder 91 and a force for lowering the disassembly portion presser 98 are acting on 6. The disassembling section support cylinder 9 described above
1. The thermal decomposition portion 90 is composed of the decomposition portion retainer 98 and the lock ball 66.

In the present embodiment constructed as described above,
When a fire occurs and the fusible alloy 62 melts, the decomposed portion presser 98 gradually descends due to the pressing force of the lock ball 66. Then, when most of the fusible alloy 62 is melted, the decomposition portion presser 98 descends to near the bottom of the decomposition portion support cylinder 91, so that the lock ball 66 moves into the decomposition portion support cylinder 91 along the inclined surface 100. . Therefore, the lock ball 6
6 and the stepped portion 12 of the frame 10a are disengaged, and the disassembly portion support cylinder 91 is unlocked.

As a result, the thermosensitive decomposition section 90 descends and falls due to its own weight and water pressure of the fire extinguishing water, and the deflector assembly 20 also descends due to its own weight and water pressure, and the stopper ring 25 is seated on the step portion 12 of the frame 10a. Stop. As a result, the water discharge port 2 is opened, and the fire extinguishing water hits the deflector 21 and is sprayed to extinguish the fire.

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 during the decomposition of the heat-sensitive decomposition section. In the present invention, as described above, the lock ball is always applied with a force in a direction in which it is disengaged from the frame. Therefore, even if the load is as low as 50 kgf, the lock ball operates sufficiently in the event of a fire. Can be made. For this reason, use a gasket made of tetrafluoride resin for sealing the valve body, which is highly elastic and does not corrode even if installed in a highly corrosive atmosphere, and can reliably seal even under a low load. You can

In the above description, the case where the frame and the disassembly portion support cylinder are provided with three ball holes and ball insertion holes at 120 ° intervals, respectively, but the number of these holes is not limited to three. It suffices if there are two or more. Similarly, the number of connecting pillars formed by extending the blades of the deflector may be two or more, and the connecting pillars may be formed separately from the deflector and integrally connected. Further, in each of the above-mentioned embodiments, the case where the present invention is applied to the flash type sprinkler head has been described, but the present invention can also be applied to a multi-type sprinkler head in which a sprinkler port is provided in a frame.

[0064]

According to the present invention constructed as described above,
The following effects can be obtained. In the following description, the respective effects will be described by giving numbers corresponding to the numbers in the claims. (1) The sprinkler head according to the present invention has a cylindrical frame having a step portion on the lower inner peripheral surface and a plurality of ball insertion holes on the side wall, and is disassembled slidably arranged in the frame. The part support cylinder, a plurality of lock balls that slightly project from the ball insertion holes of the disassembly part support cylinder and prevent the disassembly part support cylinder from coming off the frame, and are slidably disposed in the disassembly part support cylinder. , The disassembly part retainer that keeps the lock ball projecting from the ball insertion hole of the disassembly part support cylinder and the fusible alloy that is provided below the disassembly part retainer and melts by the heat of a fire. 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 parts constituting the parts, the steps in which the main parts and the heat-sensitive decomposition part are locked The frame is made smaller 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 or the like with a bottomed cylindrical decomposition portion support cylinder, the heat-sensitive decomposition portion is configured to be invisible from the outside, so that a sprinkler head having an excellent design can be obtained. it can.

Further, in terms of manufacturing, since it is not necessary to manufacture an arm having a complicated shape by press working, the work is easy, and only the load of the coil spring acts on the fusible alloy. Therefore, it is not necessary to use a high-strength material for parts such as the piston, which can reduce the manufacturing cost.

(2) Since a step portion is provided on the inner peripheral surface of the disassembling portion support cylinder of the above (1), and a balancer on a substantially disk is placed on this step portion, when the sprinkler head is assembled, The valve body provided on the balancer seals the water outlet of the main body with an assembly load of about 50 kgf to prevent water leakage of fire extinguishing water. At this time, the assembling load acts downward on the lock ball via the balancer placed on the step portion, and the disassembling portion support cylinder can be locked to the frame. Also,
Since the balancer is formed in a disc shape, this assembly load can be applied to each lock ball reliably and evenly. 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.

(3) Since the disc spring is interposed between the step portion and the balancer of the above (2), it is possible to promote the disengagement of the disassembly portion support cylinder from the frame in the event of a fire, and
The valve body can be pressed against the cylindrical portion of the main body until the lock ball comes off the frame to prevent water leakage.

(4) Since the contact surfaces of the disassembled part support cylinder and the disassembled part retainer of the above (1) and the lock ball are formed by planes orthogonal to each other, the lock ball bites into the disassembled part retainer and the like, and a fire occurs. It does not interfere with disassembly. 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

(5) Since the coil spring for urging the disassembly portion retainer is provided in the disassembly portion retainer of the above (1), the fusible alloy is constantly pressed by the coil spring, and the fusible alloy melts in case of fire. Then, the disassembly portion presser slides downward by the coil spring, and promotes the disassembly of the disassembly portion support cylinder from the frame.

(6) Since the adjustment hole for inserting the jig is formed in the disassembly part retainer of the above (1), when the sprinkler head is assembled, the jig is inserted into the adjustment hole to lock the lock ball in a predetermined position. It can be surely guided to the position.

(7) Since the lock ball confirmation hole is provided in the frame of (1) above, it can be confirmed from the outside whether or not the lock ball is securely held at a predetermined position.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of FIG.

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

FIG. 4 is a cross-sectional view of the heat sensitive unit of FIG.

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

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

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

FIG. 8 is an explanatory view of the operation of the lock ball of FIG.

FIG. 9 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 10 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 11 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 12 is an explanatory view of the operation of the embodiment shown in FIG.

FIG. 13 is a vertical sectional view of a second embodiment of the present invention.

FIG. 14 is a cross-sectional view of the disassembly unit support cylinder of FIG.

FIG. 15 is a cross-sectional view of the heat sensitive unit of FIG.

16A and 16B show the disassembled portion presser of FIG. 1, in which FIG. 16A is a sectional view and FIG. 16B is a plan view.

FIG. 17 is a vertical cross-sectional view of the third embodiment of the present invention.

FIG. 18 is an external view of FIG. 17.

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

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

[Explanation of symbols]

 1, 1a Main body 2 Water discharge port 10, 10a Frame 12 Step portion 13, 13a Ball hole 15 Valve body 20 Deflector assembly 21 Deflector 25 Stopper ring 31,71,91 Disassembly portion support cylinder 34,74 Step portion 38,76,94 ball Insertion hole 40, 78, 95 Heat-sensitive part 45, 45a Balancer 47 Disc spring 51, 82, 98 Disassembly part presser 56 Adjustment hole 58, 87, 101 Set screw 60, 70, 90 Heat-sensitive decomposition part 61 Coil spring 62 Soluble alloy 63 Piston 66 rock ball

Claims (7)

[Claims] 1. A cylindrical frame having a step portion on the lower inner peripheral surface, a disassembling portion supporting cylinder having a plurality of ball insertion holes in a side wall and slidably disposed in the frame, A plurality of lock balls that slightly project from the ball insertion holes of the disassembling part support cylinder to prevent the disassembling part support cylinder from being separated from the frame; A disassembly part retainer that holds the lock ball protruding from the ball insertion hole of the disassembly part support cylinder, and a fusible alloy that is provided below the disassembly part retainer and is melted by heat in a fire are provided. A characteristic sprinkler head. 2. The sprinkler head according to claim 1, wherein a step portion is provided on the inner peripheral surface of the disassembling portion support cylinder, and a substantially disk-shaped balancer is mounted on the step portion. 3. The sprinkler head according to claim 2, wherein a disc spring is interposed between the step portion and the balancer. 4. The sprinkler head according to claim 1, wherein 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. 5. The sprinkler head according to claim 1, wherein a Koly spring for urging the disassembly portion presser is provided inside the disassembly portion presser. 6. The sprinkler head according to claim 1, wherein an adjusting hole for inserting a jig is provided in the disassembling part retainer. 7. The sprinkler head according to claim 1, wherein the frame is provided with a hole for checking a lock ball.