JP2014076241A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head with a sprinkler head cover, capable of preventing lodgment and ensuring a normal sprinkling pattern.SOLUTION: The sprinkler head comprises: a body 1; a nozzle 6 disposed at one end side of the body 1 and connected to a water supply pipe; a valve body 2 blocking the nozzle 6; a thermosensitive decomposition part supporting the valve body 2 and placing the valve body 2 inside the body 1; a planar deflector 4 disposed adjacent to the thermosensitive decomposition part and fixed to a pin 12 inserted through a hole 15 formed outside the body 1, the pin 12 being movable along the hole 15 in a water discharge direction of the nozzle 6; a support cup 5 disposed outside the body 1; a sprinkler head cover 200 connected to the support cup 5 and having a cylindrical body 31 and a cover plate 32, in which the cover plate 32 is to come off from the cylindrical body 31 by heat of fire; and an energization member 20 for energizing the deflector 4 to the side of the cover plate 32.

Description

The present invention relates to a fire-extinguishing sprinkler head, which is concealed so that the sprinkler head is hidden from view by the cover plate during normal times, and the cover plate drops off during a fire to expose the sprinkler head. About.

The sprinkler head is installed on the ceiling or wall in the building, and operates in the event of a fire to spray water to suppress and suppress the fire. The sprinkler head has a nozzle on one end side, and the nozzle is connected to a water supply pipe laid on the back of the ceiling. A heat-sensitive operation unit is installed on the other end side, and the heat-sensitive operation unit supports a valve body that closes the nozzle during normal times. When the thermal operation part is decomposed by the heat of fire, the valve element is separated from the nozzle and the nozzle is opened. The tip of the heat-sensitive operating part is disposed so as to protrude indoors through a hole drilled in the ceiling board.

Among the above-described sprinkler heads, there is a structure in which a sprinkler head cover is installed in order to improve design properties (see, for example, Patent Documents 1 and 2).

The sprinkler head and the sprinkler head cover described in Patent Document 1 are installed on the lower surface of the ceiling, and those of Patent Document 2 are installed on the wall surface. In both sprinkler head covers, the cover plate of the sprinkler head cover has a bowl shape and has a shape bulging indoors.

In recent years, there is a structure in which the above-described cover plate is formed into a flat plate shape to further improve the design (see, for example, Patent Document 3). FIG. 8 shows a sprinkler head described in Patent Document 3. Most components of this sprinkler head are arranged on the back side of the ceiling.

In the sprinkler head A shown in FIG. 8, the cover plate 110 is dropped first in the event of a fire, and the plate-like deflector 111 supported by the cover plate 110 moves downward due to its own weight. The deflector 111 is held by a pin 112 and is arranged at a position protruding from the lower surface of the ceiling C to the indoor side.

Subsequently, when the thermal decomposition unit 113 of the sprinkler head A is decomposed by the heat of the fire, the valve 114 supported by the thermal decomposition unit 113 is separated from the nozzle 115 and the nozzle 115 is opened. When the nozzle 115 is opened, water in the water supply pipe 116 is discharged from the nozzle 115 and collides with the deflector 111, and the deflector 111 scatters water in all directions. As a result, water scattered from the sprinkler head reaches the fire source and suppresses the fire.

Japanese Patent Laying-Open No. 2005-279083 Japanese Patent Laid-Open No. 11-267243 JP 2012-80961 A

As described above, the sprinkler head shown in FIG. 8 has a structure in which most of the components are arranged on the back side of the ceiling, and the deflector protrudes indoors as the cover plate is removed, so that the cover plate of the sprinkler head cover is placed on the ceiling surface. And a flat plate shape.

On the other hand, regarding the sprinkler head and the sprinkler head cover having a structure installed on the wall surface of Patent Document 2, if the cover plate is made flat as shown in FIG.

As one of them, when the cover plate is dropped in the event of a fire, if the thermal decomposition unit is activated with the deflector placed in the vicinity of the thermal decomposition unit without moving to the indoor side, the components of the thermal decomposition unit will be It may collide with the deflector or be locked by the deflector, resulting in a so-called lodgement and malfunction.

If water is discharged from the nozzle while the thermal decomposition unit components are locked to the deflector, the components locked to the deflector hinder watering, and the regular watering pattern cannot be obtained. There is a risk that a bias may occur causing the fire to spread.

Therefore, in view of the above problems, an object of the present invention is to provide a sprinkler head in which a sprinkler head with a sprinkler head cover provided with a regular watering pattern by preventing the occurrence of lodgement is provided.

In order to achieve the above object, the present invention provides the following sprinkler head.
There is a nozzle connected to the water supply pipe on one end side of the main body, the nozzle is closed by the valve body, the valve body is supported by the thermal decomposition part and locked inside the main body, and a plate is located near the thermal decomposition part The deflector is fixed with a pin inserted through a hole drilled outside the main body, and the pin is movable in the direction of water discharge of the nozzle along the hole, and is a cylindrical shape installed outside the main body The support cup is detachably connected with a sprinkler head cover that consists of a cylinder and a cover plate, and the cover plate is detached from the cylinder by the heat of the fire, and a biasing member that urges the deflector toward the cover plate is provided. Sprinkler head.

  According to this, when the deflector is urged toward the cover plate by the urging member, the deflector moves in the direction of water discharge of the nozzle by the urging member when the cover plate is detached in the event of a fire and leaves the thermal decomposition section. Therefore, it is possible to prevent a so-called lodgement in which components of the thermal decomposition unit collide with or be locked to the deflector when the thermal decomposition unit is decomposed.

In the present invention, the urging member is installed between the support cup and the pin, and can be configured to urge the deflector toward the cover plate via the pin.
According to this, when the urging member is constituted by, for example, a coil spring, the spring can be formed large, and thus a large stroke can be obtained by the spring.

In the present invention, the pin is in contact with the support ring and can be configured to be urged by the urging member via the support ring.
According to this, when a coil spring is used as the urging member as described above, the support ring can be used as a seating surface of the coil spring, and the force of the coil spring can be applied to the pin without being biased.

With respect to the present invention, the urging member can be configured to be installed between the collar portion provided at the intermediate portion of the pin and the main body and urge the deflector toward the cover plate via the pin.
According to this, the deflector can be biased toward the cover plate by inserting the coil spring through the pin.

In the present invention, the biasing member is disposed between the main body and the deflector, and can be configured to bias the deflector toward the cover plate.
According to this, by arranging the urging member between the main body and the deflector, the urging member can be detached from the sprinkler head after the cover plate is detached and the deflector is moved.

Further, the present invention is the one in which the sprinkler head according to any one of the present invention is installed on the wall surface, so that the deflector can be reliably separated from the thermal decomposition part by the action of the urging member after the cover plate is detached. Thus, it is possible to prevent the components of the thermal decomposition unit from being caught by the deflector when the thermal decomposition unit is decomposed.

As described above, according to the present invention, it is possible to provide a sprinkler head that can prevent a lodgement and obtain a regular watering pattern in a sprinkler head provided with a sprinkler head cover.

Sectional view of the first embodiment XX sectional view of FIG. 2 is an exploded sectional view of the sprinkler head of FIG. Sectional drawing of the state which the cover plate of 1st Embodiment removed Sectional view at the time of operation (during watering) of the first embodiment Sectional view of the second embodiment Sectional view of the third embodiment Sectional view of a conventional sprinkler head and sprinkler head cover

1st Embodiment (FIGS. 1-5)
The sprinkler head 100 and the sprinkler head 200 of the first embodiment have substantially the same structure as the sprinkler head and the sprinkler head cover described in JP2012-80961A, JP2011-218062A, and the like.

The sprinkler head 100 is connected to a water supply pipe (indicated by a two-dot chain line in the figure) laid on the back side of the wall surface W. The sprinkler head 100 includes a main body 1, a valve body 2, a thermal decomposition unit 3, a deflector 4, and a support cup 5.

The main body 1 has a cylindrical shape and has a nozzle 6 inside. A male screw 7 for connecting to the water supply pipe is installed outside the nozzle 6. The central axis of the nozzle 6 and the water supply pipe is installed substantially perpendicular to the wall surface W, so that the central axis of the nozzle 6 is installed horizontally.

The outlet side of the nozzle 6 is closed by a plate-like valve body 2. In the drawing, a space having a diameter larger than the inner diameter of the nozzle is formed on the right side of the outlet of the nozzle 6, and an inner flange 8 is formed on the right end of the main body 1 to which the thermal decomposition portion 3 is locked. Yes.

The thermal decomposition unit 3 is a unit configured by combining a plurality of parts as shown in FIG. Since the detailed structure of the thermal decomposition part 3 is described in the above-mentioned publication, detailed description is omitted. As shown in FIG. 1, the thermal decomposition part 3 has a pair of lever ends 3 </ b> A locked to the inner flange 8 of the main body 1, and holds the valve body 2 at the outlet end of the nozzle 6 via a saddle 9 and a screw 10. doing.

The deflector 4 has a plate shape, and a plurality of fins 11 are formed by slits at the periphery. There are fins 11 formed in parallel to the nozzle outlet end face, and fins 11 inclined to the nozzle 6 side. Two holes 13 through which the pin 12 is inserted are formed in the peripheral portion of the deflector, and one end side of the pin 12 is inserted into the hole 13 so that the deflector 4 and the pin are fixedly connected.

A flange 14 is formed on the other end side of the pin 12. After the pin 12 is inserted into the pin hole 15 of the main body 1, the end opposite to the side where the flange 14 is installed is fixedly connected to the deflector 4. The outer diameter of the flange 14 is larger than the inner diameter of the pin hole 15.

The support cup 5 has a cylindrical shape, and a spiral groove 16 is formed on the side surface. The spiral groove 16 can be engaged with the claw 33 of the sprinkler head cover 200.

A flat surface 17 is formed on one end side of the support cup 5, and an engagement hole 18 that is engaged with the main body 1 is formed in the center of the flat surface 17. The engagement hole 18 has a polygonal shape, and has substantially the same shape as the outer shape of the engagement portion 19 near the base of the male screw 7 of the main body 1. When the engagement hole 18 is engaged with the engagement portion 19 of the main body 1, the main body 1 and the support cup 5 are rotated.

A spring 20 and a support ring 21 are installed between the flat surface 17 and the flange portion 14 of the pin 12. The spring 20 urges the flange portion 14 via the support ring 21 toward the cover plate disposed in the water discharge direction of the nozzle 6.

The sprinkler head cover 200 includes a retainer 31 and a cover plate 32.

The retainer 31 has a cylindrical shape, and claws 33 are formed on the side surface at predetermined intervals. The claw 33 is formed to protrude to the outside, and is engaged with the spiral groove 16 of the support cup 5 described above. The claw 33 can move along the spiral groove 16, and the claw 33 moves along the spiral groove 16 by rotating the sprinkler head cover 200. Accordingly, the support cup 5 and the retainer 31 can be configured to be detachable, and the position can be adjusted so that the cover plate 32 is close to the wall surface W.

A flange 34 is formed at the end of the retainer 31 on the cover plate 32 side. The surface of the flange 34 on the support cup 5 side has a stopper action. Specifically, the flange 34 is in contact with the wall surface W so that the retainer 31 cannot move further to the back side of the support cup 5. A leg 35 extends from the flange 34 to the cover plate 32 side. The tip 36 of the leg 35 is bent parallel to the cover plate 32 and joined by a low melting point alloy 37. A low melting point alloy 37 having a melting point lower than the operating temperature of the sprinkler head 100 is used.

The cover plate 32 has a disk shape and is formed from a thin plate of copper or copper alloy. The cover plate 32 is joined to the legs 35 of the retainer 31 by the low melting point alloy 37 as described above. In the event of a fire, the low melting point alloy 37 melts and the cover plate 32 is detached from the retainer 31.

Next, the operation of the first embodiment will be described.
As shown in FIG. 1, the sprinkler head 100 is installed through a hole H in a wall surface W, and a water supply pipe laid on the back side of the wall surface W and a male screw 7 of the main body 1 are connected. At this time, the central axis of the nozzle 6 is disposed substantially perpendicular to the wall surface W. The sprinkler head 100 is concealed by the sprinkler head cover 200 and cannot be seen from the indoor side. The sprinkler head cover 200 is attached to the sprinkler head 100 by engaging the claw 33 of the retainer 31 with the spiral groove 16 of the support cup 5. Specifically, the retainer 31 is screwed into the support cup 5 until the flange 34 of the retainer 31 is close to the wall surface W.

When a fire occurs, the low melting point alloy 37 that has joined the cover plate 32 to the retainer 31 is melted by the heat of the fire, and the joining strength between the cover plate 32 and the retainer 31 is weakened. Then, the pin 12 urged toward the cover plate 32 by the spring 20 moves to the right in the figure by the action of the spring 20. As a result, the deflector 4 fixed to the pin 12 also moves, and the deflector 4 moves away from the thermal decomposition unit 3. At the same time, the cover plate 32 moves together with the deflector 4 and is released from the legs 35 of the retainer 31 to the outside.

Subsequently, the low melting point alloy inside the thermal decomposition part 3 is melted by the heat of the fire, and the thermal decomposition part 3 is decomposed. The disassembled components of the thermal decomposition unit 3 are scattered out of the support cup 5. At this time, since the deflector 4 is separated from the thermal decomposition unit 3, the components of the decomposed thermal decomposition unit 3 collide with the deflector 4 and bounce back to the inner side of the retainer 31, or the fins 11 of the deflector 4 Prevents mooring by hooking on edges.

By the operation of the thermal decomposition unit 3, the valve body 2 supported by the thermal decomposition unit 3 leaves the outlet end of the nozzle 6 and the nozzle 6 is opened. The water discharged from the nozzle 6 collides with the deflector 4 and is scattered in the room to suppress the fire.

Second Embodiment (FIG. 6)
Next, the second embodiment will be described. In addition, the same code | symbol is attached | subjected to the location with the same structure as 1st Embodiment, and detailed description is abbreviate | omitted. In the second embodiment, an urging member is installed between the collar formed in the middle of the pin and the main body.

In the sprinkler head 300 according to the second embodiment shown in FIG. 6, the coil spring 40 is inserted through the pin 12, and the coil spring 40 is fixed between the end surface of the pin hole 15 through which the pin 12 of the main body 1 is inserted and the pin 12. It arrange | positions between the installed collar parts 41. FIG. More specifically, the collar part 41 is installed between the pin hole 15 of the main body 1 and the end on the side where the deflector 4 is installed, and the coil spring 40 is provided on the end surface of the collar part 41 and the pin hole 15 of the main body 1. Installed between. The flange 41 may be formed in advance on the pin 12 or may be installed by being connected to the pin 12 after the pin 12 is inserted through the pin hole 15.

In a state where the sprinkler head cover 200 is attached to the sprinkler head 300, the coil spring 40 is in a compressed state, and biases the deflector 4 toward the cover plate 32 (see FIG. 6).

When the cover plate 32 is detached in the event of a fire, the deflector 4 is moved in the water discharge direction (right side in the figure) of the nozzle 6 by the action of the coil spring 40, and the deflector can be separated from the thermal decomposition unit 3.

Third embodiment (FIG. 7)
Next, a third embodiment will be described. In addition, the same code | symbol is attached | subjected to the location with the same structure as 1st Embodiment, and detailed description is abbreviate | omitted. In the third embodiment, an urging member is installed at the end of the thermal decomposition unit 3 to urge the deflector 4 toward the cover plate 32.

In the sprinkler head 400 shown in FIG. 7, a spring 50 is installed between the end of the thermal decomposition unit 3 and the deflector 4, and the spring 50 biases the deflector 4 toward the cover plate 32. At this time, if one end of the spring 50 is configured to come into contact with the coupling portion 53 between the heat collector 51 and the cylinder 52 of the thermal decomposition unit 3, deformation of the heat collector 51 due to the force of the spring 50 can be prevented.

The case where the sprinkler head and the sprinkler head cover according to the first to third embodiments are installed on the wall surface has been described above. However, the present invention is not limited to this and can be applied to a sprinkler head installed on the ceiling surface. .

1 body
2 Disc
3 Thermal decomposition section
4 Deflector
5 Support cup
6 nozzles
12 pins
14 Buttocks
20, 40, 50 Spring
21 Support ring
31 Retainer
32 Cover plate
100, 300, 400 Sprinkler head
200 Sprinkler head cover

Claims (6)

There is a nozzle connected to the water supply pipe on one end side of the main body, the nozzle is closed by the valve body, the valve body is supported by the thermal decomposition part and locked inside the main body, and a plate is located near the thermal decomposition part The deflector is fixed with a pin inserted through a hole drilled outside the main body, and the pin is movable in the direction of water discharge of the nozzle along the hole, and is a cylindrical shape installed outside the main body The support cup is detachably connected with a sprinkler head cover that consists of a cylinder and a cover plate, and the cover plate is detached from the cylinder by the heat of the fire, and a biasing member that urges the deflector toward the cover plate is provided. Sprinkler head characterized by that. The sprinkler head according to claim 1, wherein the biasing member is installed between the support cup and the pin and biases the deflector toward the cover plate via the pin. The sprinkler head according to claim 1, wherein the pin is in contact with the support ring and is urged by the urging member through the support ring. The urging member is installed between a collar portion provided at an intermediate portion of the pin and the main body, and urges the deflector toward the cover plate via the pin. Sprinkler head. The sprinkler head according to any one of claims 1 to 4, wherein the biasing member is disposed between the main body and the deflector and biases the deflector toward the cover plate. The sprinkler head according to any one of claims 1 to 5, wherein the sprinkler head is installed on a wall surface.

Images