JP2001061988A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sprinkler head of detecting fire at the early stage and starting the means that promotes the action. SOLUTION: At a sprinkler head 1 has a cover 35, which is set to cover the bottom part regularly and falls down by the heat of fire, a means 21, which promotes the action of sprinkler head 1 by heating, damaging or braking the thermosensitive part 8 of sprinkler head 1, is set. When the cover 35 falls down, it makes the means 21 start.

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 sprinkler head provided with a means for promoting operation in a fire.

[0002]

2. Description of the Related Art As is well known, in a wet type sprinkler fire extinguishing system, a water discharge port of a sprinkler head is always filled with pressurized water, and the water discharge port is closed by a valve body. The valve body is supported by a link mechanism via a low melting point alloy constituting the heat sensitive part, or is supported by a glass bulb which is a heat sensitive part mounted on a horseshoe-shaped arm. Then, when a fire occurs, the low melting point alloy is melted by the flame or the hot air flow, or the glass bulb is broken and opened, and fire water is sprinkled.

[0003] In such a sprinkler head, if the heat-sensitive portion is destroyed by an external force, the sprinkler head is opened (exploded) even though a fire has not occurred, and fire extinguishing water is sprinkled and large. May be damaged.
In order to solve such a problem, there has been proposed a so-called concealed sprinkler head in which a sprinkler head, in particular, a heat-sensitive portion thereof is covered with a cover to protect it from external force.

In the concealed sprinkler head, since the heat-sensitive portion is covered with a cover to protect it from external impact, it is possible to prevent the occurrence of an explosive accident, but since the heat-sensitive portion is covered with the cover. In addition, when a fire occurs, the thermal response due to the flame or the hot air flow is slow, and therefore, there is a problem that the operation is easily delayed.

Japanese Utility Model Application Laid-Open No. 48-113706 and Japanese Utility Model Application Laid-Open No. 52-109800 disclose a conventional sprinkler head having no cover, in which a heater is provided directly or in the vicinity of the heat-sensitive portion. A pushbutton switch for operating this heater is provided on the wall, etc., and when a fire occurs, the pushbutton switch is pressed to energize the heater, heat the heat sensitive part and accelerate the operation of the sprinkler head. Has been
It is conceivable that such a device is applied to a concealed sprinkler head to accelerate the operation.

[0006]

When the above-described invention is applied to a concealed sprinkler head, the operation of the sprinkler head can be promoted. However, if a person is not present when a fire occurs, the push button switch is pressed. If the push button switch is pressed by mistake while the fire has not occurred, the sprinkler head may operate to sprinkle water and cause serious damage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to obtain a sprinkler head which detects a fire at an early stage and activates means for promoting operation. is there.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a sprinkler head provided with a cover which is always provided so as to cover a lower portion and which is dropped by heat in the event of fire, in which a heat-sensitive portion of the sprinkler head is heated or damaged or broken. Means for promoting the operation of the sprinkler head, and the means is activated when the cover falls.

Further, the present invention relates to a glass valve for supporting a valve for closing a water discharge port in a sprinkler head provided with a cover which is always provided so as to cover a lower part and which is dropped by heat in a fire. And a stopper urged toward the glass valve by a spring, and stopper means provided on the cover for normally holding the lever at a position away from the glass valve.

Further, the present invention provides a sprinkler head having a glass bulb filled with a thermal expansion material and supporting a valve for closing a water outlet, provided with a damaging means for damaging the glass bulb in case of fire. Things.

The above damaging means is constituted by a lever which is urged by a spring to strike the glass bulb, and a stopper means which regulates the operation of the lever.

Further, a permanent magnet is provided for any of the above levers, and a reed switch controlled by the permanent magnet is provided.

[0013]

[First Embodiment] FIG. 1 is a longitudinal sectional view of a sprinkler head according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In both figures, 61 is a ceiling plate, which is an opening 6 for installing a sprinkler head.
2 are provided. Reference numeral 1 denotes a closed sprinkler head installed facing the opening 62, and reference numeral 11 denotes a sprinkler head cover mounted on the sprinkler head 1 and covering the sprinkler head 1. Reference numeral 63 denotes a ring-shaped sealing plate which has an opening at the center and closes the outer periphery of the sprinkler head cover 11 at the opening 62 of the ceiling plate 61.

The sprinkler head 1 has a water outlet (not shown) at the center, a screw portion 2 provided with a screw on the outer periphery, and a lower portion of the screw portion 2 integrally formed with the screw portion 2 and a valve at the center. A flange portion 3 having a water outlet (not shown) provided with a seat, and a male screw 4 provided on the outer periphery, and a flange portion 3
The lower end portion is composed of frames 5 a and 5 b which are suspended from the lower end and integrally connected to the receiving seat 6. Numeral 7 designates a valve body for closing the water outlet of the flange portion 3. Between the seat 6 and the valve body 7, a glass valve 8 which is a thin glass tube and has a thermal expansion material such as alcohol sealed therein to constitute a heat sensitive portion. Is interposed to support the valve body 7 in a water-tight manner at the water outlet. 9 is a deflector fixed to the seat 6.

The sprinkler head cover 11 has a mounting member 12 mounted on the sprinkler head 1, a cover member 35 detachably mounted on a lower portion of the mounting member 12 and covering a lower portion of the sprinkler head 1, and a mounting member 12 inside the cover member 35. Protector 41, mounting member 12, detachably joined to the lower end of the cover member 35, a spring hook 48 and a spiral spring 5 interposed between the protector 41 and the cover member 35 to urge the cover member 35 outward and downward.
2. Damage means 21 provided on the mounting member 12 for promoting the operation of the glass bulb 8 of the sprinkler head 1 and the like. Hereinafter, each member constituting the sprinkler head cover 11 will be described in detail.

As shown in FIG. 3, the mounting member 12 is formed in a substantially cylindrical shape by, for example, a synthetic resin, and a flange 13 is provided on the outer periphery of a lower end portion. A plurality of locking recesses 14 (see FIG. 2) inclined at an angle of approximately 45 ° are provided. Reference numeral 15 denotes a locking step provided on the lower surface of the flange 13 for locking the protector 41. Reference numeral 16 denotes a screw provided on the upper portion of the inner wall.

Numeral 21 denotes a damage means provided in a mounting groove 17 (see FIG. 2) provided in a lower portion of the inner wall of the mounting member 12, and details thereof are shown in FIG. The damage means 21 includes a long piece 23 made of a steel plate, a synthetic resin or the like, and a short piece 2 orthogonal to the long piece 23.
4, and a substantially L-shaped lever portion 22 integrally formed with a cylindrical bearing portion 25 provided at the intersection of the two and through which the support shaft 28 is inserted. A projection 26 made of a hard material such as diamond, cemented carbide, or steel is attached to the inner surface, and a pin hole 27 is provided in the short piece 24. Reference numeral 29 denotes a spring mounted on the support shaft 28 and having both ends pressed against the long piece 23 and the short piece 24 to bias the lever 22 in the direction of the arrow (toward the center of the mounting member 12). The spring 29 has a spring force enough to damage the glass bulb 8 without breaking the glass bulb 8 when the lever portion 22 is rotated. If necessary, a cushion member made of rubber or the like is provided around the projection 26. And adjust the impact force.

In the damaging means 21 configured as described above, the support shaft 28 inserted and fixed to the bearing member 25 is rotatably supported on both side walls of the mounting groove 17 of the mounting member 12, and attached to the spring 29. And is held in the state of FIG. Although the case where the damaging means 21 is accommodated in the mounting groove 17 provided in the mounting member 12 is shown, the mounting groove 17 is omitted, and the mounting member 1 is removed.
A pair of support arms may be provided on the inner wall of the second support arm, and the support arm may rotatably support the support shaft. The support shaft 28 rotatably inserted into the bearing 25 may be fixed to the mounting member 12.

Referring again to FIG. 1, the cover member 35 is made of a thin metal material such as copper or aluminum having a high thermal conductivity.
It is formed almost in a bowl shape. As shown in FIG. 5, the protector 41 includes a ring-shaped upper frame 42, a ring-shaped lower frame 43 having a smaller diameter than the upper frame 42, and a plurality of ribs 44 connecting the upper frame 42 and the lower frame 43. For example, it is formed integrally with a synthetic resin, and a projection 45 is provided on the upper surface of the upper frame 42 so as to fit into the locking step 15 of the mounting member 12. 46 is a spiral spring 52 provided on the lower surface of the lower frame 43.
The spring seat 47 is a stopper plate which is provided in the diameter direction of the lower frame 43 and has a band-shaped metal plate integrally formed by inserting both ends into the lower frame 43, for example.

In addition, among the plurality of ribs 44, the mounting member 1
On the outer surface of the rib 44 corresponding to the second locking concave portion 14, a concave portion 44a is provided in the vertical direction, and a lower end portion of the concave portion 44a is bent at the tip to form a locking portion 49. The board portion of the spring hook 48 made of a leaf spring is inserted and integrated, for example. Reference numeral 50 denotes a support plate which is made of, for example, a steel plate and is provided in the upper frame 42 of the protector 41 so as to protrude in the center direction by an insert or the like. Reference numeral 51 denotes a locking pin provided on the support plate 50 so as to correspond to the pin hole 27 of the damaging means 21 and constituting stopper means for restricting the operation of the damaging means 21.

Since the protector 41 has an opening formed between the ribs 44, the cover member 35 is formed as described later.
Even if the protector 41 is fixed to the mounting member 12 and does not fall after the fall, the hot air flow flows in from the opening and heats the glass bulb 8, so that it is combined with the operation of the damage means 21 described later. Therefore, the operation of the sprinkler head 1 is not delayed. Note that, with the operation of the sprinkler head 1, the protector 41 is reliably dropped by the water discharge pressure.

The plurality of ribs 44 provided on the protector 41 reduces the heat capacity of the protector 41 and reduces the contact area with the cover member 35 so that the cover member 35 receives heat when it is fired. This is to prevent the protector 41 from robbing as much as possible, promote the melting of the low-melting-point solder described later, and prevent the operation delay of the sprinkler head 1.

Next, an example of an assembling procedure according to the present embodiment will be described. As shown in FIG. 6A, a substantially U-shaped hook 3 for fixing a stopper plate 47 provided on the protector 41 is provided at the center of the inner surface of the cover member 35.
6 is previously attached with an alloy 38 having a melting point lower than the operating temperature of the sprinkler head 1 (hereinafter, referred to as low melting point solder).

First, the projection 45 provided on the protector 41 is fitted to the locking step 15 provided at the lower end of the mounting member 12, and the two are joined. At this time, the position of each spring hook 48 is aligned with the engagement recess 14 of the mounting member 12 and
The support plate 50 provided on the protector 41 is aligned with the position of the damage means 21 of the mounting member 12, and the locking pin 51 provided on the support plate 50 is fitted into the pin hole 27 provided on the lever 22 of the damage means 21. Thereby, the lever portion 22 is restrained by the locking pin 51, and the long piece 23 is
As shown in FIG. 7A, the projection 26 is substantially upright against the urging force of the spring 29, and the projection 26 is held at a position away from the glass bulb 8.

Next, a spiral spring 52 is interposed in the spring seat 46 of the protector 41, and a jig is used in this state so that these three parts are placed in the cover member 35 and the mounting member 12
Of the cover member 35 until the flange 13 contacts the upper end of the cover member 35. As a result, the stopper plate 47 is
As shown in (a), the spiral spring 52 is inserted between the arm portions 37a and 37b of the hook 36 provided on the bottom of the cover member 35, and is compressed and held between the protector 41 and the cover member 35. . The spring hook 48 is pressed by the cover member 35 and pressed into the concave portion 44a of the rib 44 in a compressed state.
Is locked in the locking recess 14.

In this state, the arms 37a, 3
As shown in FIG. 6 (b), 7b is bent inwardly and caulked, and the stopper plate 37 is fixed to the cover member 35 via the hook 36 and the low melting point solder 38.

In the sprinkler head cover 11 according to the present embodiment assembled as described above, the cover member 35 is constantly biased downward by the spiral spring 52 interposed between the cover member 35 and the protector 41. The cover member 35 and the protector 41 are integrally fixed by a stopper plate 47 and a hook 36. Further, a spring hook 48 provided on the protector 41 is provided with a reaction force for urging the cover member 35 outward. The locking part 49 is the mounting member 1
2 is locked in the locking recess 14, so that the cover member 35
Overcomes the biasing force of the spiral spring 52 and is held at that position.

In the sprinkler head cover 11 configured as described above, the opening of the sealing plate 63 is fitted to the mounting member 12 and positioned on the flange 13.
1 is inserted into the opening 62 from underneath. The mounting member 1 is attached to a male screw 4 provided on the flange 3 of the sprinkler head 1.
The second female screw 16 is screwed and fixed and mounted. The attachment member 12 from which the female screw 16 is omitted may be pressed into the flange 3 of the sprinkler head 1.

As described above, since the sprinkler head cover 11 is mounted on the sprinkler head 1 only by screwing or press-fitting the mounting member 12 into the flange 3, it can be performed extremely easily and in a short time. Further, since the sprinkler head 1 is completely covered and protected by the sprinkler head cover 11, even if an external force acts from below or on the side of the cover member 35, it is absorbed by the mounting member 12 via the protector 41, and No external force is applied to the sprinkler head 1.

Next, the operation of the present embodiment will be described. In the monitoring state shown in FIG. 1, when the cover member 35 is heated by a flame or a hot air flow due to the occurrence of a fire, the hook 3
6 is melted, the cover member 35 and the stopper plate 47 are separated from each other, and the cover member 35 is released from the restraint by the protector 41 and enters a free state. Extruded. As a result, the upper portion of the cover member 35 is disengaged from the spring hooks 48 and the pressing force is eliminated, so that each spring hook 48 is displaced outward by its spring force, and
Is detached from the locking concave portion 14 of the mounting member 12.

As a result, as shown in FIG. 7, the cover member 35 falls off the mounting member 12, and subsequently, the spiral spring 52 and the protector 41 also fall by their own weight.
When the protector 41 falls, the locking pin 5
1 is a pin hole 27 of the damaging means 21 provided in the mounting member 12.
The lever 22 of the damaging means 21 is urged by a spring 29 and pivots around the support shaft 28 in the center direction to release the restraint. A scratch 8a such as a crack is made on the surface of the glass bulb 8 by hitting the bulb 8 (hereinafter, this scratch is referred to as damage).

As a result, the destruction of the glass bulb 8 heated by the hot air flow caused by the fire is promoted, and the sprinkler head 1 can be operated without delay.

In the present embodiment, the cover member 35
Is fixed to the stopper plate 47 via a low melting point solder 38 provided at one place at the bottom which is easily exposed to a flame or a hot air flow in the event of a fire. 12 can be separated. Further, the cover member 35 does not accidentally come off during transportation or monitoring.

The damaging means 21 does not destroy the glass bulb 8, but reduces the strength of the glass body by damping the glass bulb 8 with a spring force adjusted to the extent that the glass bulb 8a is formed. Even if the damage means 21 is actuated and the glass bulb 8 is damaged for some reason, the glass bulb 8 will not be destroyed unless the glass bulb 8 is heated by the heat of a fire. Explosion can be prevented.

[Second Embodiment] FIG. 8 is a longitudinal sectional view of a sprinkler head according to a second embodiment of the present invention, and FIG.
It is explanatory drawing of the damage means. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. 30
Is the protrusion 2 of the long piece 23 of the lever 22 of the damaging means 21.
6, a permanent magnet 31 provided on the back side of the permanent magnet 30
The terminal of the reed switch 31 is connected to a control unit (not shown) via a signal line (not shown). The power is supplied constantly or intermittently.

In the present embodiment configured as described above, at the time of monitoring, as shown in FIG. 9A, the long piece 23 of the lever portion 22 of the damaging means 21 is similar to that of the first embodiment. Since the permanent magnet 30 attached thereto is located near the reed switch 31, the contact piece 32 of the reed switch 31 is attracted to the reed switch 31 and the circuit is closed. The signal is energized.

When the cover member 35, the protector 41 and the like fall due to the occurrence of a fire and the damaging means 21 rotates to damage the glass bulb 8 as described with reference to FIG.
As shown in (b), the permanent magnet 30 is connected to the reed switch 3.
1, the contact piece 32 of the reed switch 31 is opened. As a result, the signal from the control unit is de-energized, and the control unit detects this to detect that the sprinkler head 1 operates. In this case, it is described that the operation of the sprinkler head 1 is detected. However, it is not detected that the sprinkler head 1 actually operates, but the state before the operation of the sprinkler head 1, that is, after that (for example, , After a few minutes)
This is to detect that the sprinkler head 1 operates.

According to the present embodiment, as in the case of the first embodiment, the damage means 21 is actuated by the fall of the cover member 35 of the sprinkler head cover 11, the protector 41 and the like due to the occurrence of a fire, and the glass valve 8 is operated. , The damage caused by the heat of the fire is promoted, and the operation of the sprinkler head 1 is detected by opening the contact piece 32 of the reed switch 31 by the operation of the damage means 21. You can know the location.

[Third Embodiment] In the first and second embodiments, the operation promoting means and the operation detecting means of the sprinkler head using the glass valve have been described. However, the present embodiment is directed to a flash type sprinkler head. It relates to means for promoting operation.

FIG. 10 is a longitudinal sectional view of the sprinkler head according to the present embodiment. In the figure, 71 is a flush type sprinkler head, 72 is a screw part having a water outlet at the center, 73 is formed integrally with this screw part 72, and has a water outlet at the center and a screw 74 on the outer periphery. It is a provided flange. A link mechanism 75 includes a deflector and opens a water outlet closed by a valve element in the event of a fire. The link mechanism 75 supports the link mechanism 75 at a lower portion, and melts and disassembles the link mechanism 75 in the event of a fire. Is provided with a solder 76 made of a low melting point alloy. Reference numeral 77 denotes a heat-sensitive plate which is provided on the outer periphery of the solder 76 and is heated by a flame or a hot air flow at the time of a fire to melt the solder 76.

Reference numeral 11 denotes a sprinkler head cover which covers the sprinkler head 71 and protects it from external force.
And a substantially cylindrical mounting member 12 having a female screw provided on an upper inner wall, and a thin metal material having a high thermal conductivity such as copper or aluminum. A substantially bowl-shaped cover member 35 formed with 35a is formed. A terminal fitting 83 to which a signal line described later is connected is provided on the cylindrical portion of the mounting member 12.
a, 83b are provided with insertion holes 12a, 12b,
The flange 13 is provided with a through hole 13b through which an actuator of a switch described later is inserted.

Numeral 81 denotes a control unit whose power line is connected to the mounting member 1.
Terminal fittings 83a provided in the two insertion holes 12a and 12b,
83b is connected to one end. Reference numeral 82 denotes a heater which is mounted on the heat-sensitive plate 77 and is made of, for example, a coil. Although the case where the heater 82 is provided on one heat-sensitive plate 77 has been described, it may be provided on a plurality of heat-sensitive plates 77.

Reference numeral 84 denotes a switch, such as a microswitch, provided on the outer periphery of the mounting member 12 or in the vicinity thereof. The switch 84 is connected to the control unit 81 by a signal line and is energized constantly or intermittently. Reference numeral 85 denotes an actuator for the switch 84, which is constantly urged downward by a spring 86. When the actuator 85 is urged by the spring 86 and extends downward, the switch 84 is turned off to turn off the power. And above the spring 86, the switch 84
Is turned ON to be energized.

In the present embodiment constructed as described above, the terminals of the heater 82 are connected to the terminal fittings 83a and 83b, the mounting member 12 is inserted into the opening 62 of the ceiling plate 61, and the female screw is connected to the sprinkler. Flange 7 of head 71
3 is screwed into the male screw 74 provided for mounting. At this time,
The actuator 85 of the switch 84 is inserted into a through hole 13 b provided in the flange 13 of the
And the switch 84 is turned off. Next, the heater 82 is attached to the heat-sensitive plate 77.

Next, the heat-sensitive plate 77 is covered with the cover member 35, and the solder 38a having a lower melting point than the solder 76 supporting the link mechanism 75 (hereinafter referred to as low-melting solder) is used.
The flange 35a is joined to the metal plate 13a provided on the flange 13 of the mounting member 12. At this time, since the actuator 85 of the switch 84 is pushed upward by the cover member 35 and is located above, the switch 84 is turned ON. In this state, the power supply line is connected from the control unit 81 to the terminal fittings 83a, 83a.
b, and a signal line from the control unit 81 is connected to the switch 84.

Next, the operation of the present embodiment will be described. At the time of monitoring, the heater 82 is not energized and
The switch 84 in the N state is constantly or intermittently energized from the control unit 81. When a fire occurs and the cover member 35 is heated by the flame or the hot air flow, the low-melting solder 38a is melted by the heat, and the cover member 35 is separated from the mounting member 12 and falls.

As a result, the actuator 85 of the switch 84 is urged by the spring 86 and descends, so that the switch 84 is turned off and becomes non-energized. The controller 81
When the switch 84 is turned off, the cover member 35
When it is detected that the heater 8 has dropped, the heater 8 is connected via the power line.
2 and the heater 82 is heated. The heat of the heater 82 promotes the melting of the solder 76, and causes the sprinkler head 71 to operate early. When the heat-sensitive plate 77 is dropped by the operation of the sprinkler head 71, the power supply line is detached from the terminal fittings 83a and 83b by the water pressure of the fire-extinguishing water, and the heater 82 falls together with the heat-sensitive plate 77.

In this embodiment, the sprinkler head 71
It is possible to detect that the sprinkler head 71 operates by the fall of the cover member 35 constituting the sprinkler head cover 11 due to the occurrence of a fire. When it is detected that the cover member 35 has fallen, the heater 82 is automatically energized, and the heat thereof causes the link mechanism 75 to move.
Is promoted, and the sprinkler head 71 is operated early, so that the operation of the sprinkler head 71 can be automatically advanced with a simple configuration.

[Embodiment 4] In the present embodiment, the system in Embodiment 3 is applied to a glass valve type sprinkler head. That is, a glass valve type sprinkler head is used instead of the flash type sprinkler head in FIG. 10, and a heater is directly mounted on the glass valve, or a heater is arranged near the glass valve.

The operation of the present embodiment is almost the same as that of the third embodiment. However, unlike the first and second embodiments, the glass bulb is destroyed by the heat of the heater, and the sprinkler head is quickly moved. Make it work.

In the first and second embodiments, the sprinkler head cover 11 is constituted by the mounting member 12, the cover member 35, the protector 41, and the like. In the third and fourth embodiments, the sprinkler head cover 11 is formed by the mounting member 12 and the cover member 35. Although the case in which the head cover 11 is configured has been described, the sprinkler head cover is not limited to these, but may be any as long as the sprinkler head is provided at or near the sprinkler head and has a cover that falls when a fire occurs.

[0052]

The present invention relates to a sprinkler head provided with a cover which is always provided so as to cover the lower part and which is dropped by heat in the event of fire, by heating, damaging or destroying the heat-sensitive portion of the sprinkler head. Is provided when the cover falls, so that the operation of the sprinkler head can be automatically accelerated due to the occurrence of a fire, and the fire can be extinguished early.

Further, the present invention provides a sprinkler head provided with a cover which is always provided so as to cover the lower part and which is dropped by heat in the event of fire, and which supports a valve for closing a water outlet, And a stopper provided on the cover and biased toward the glass bulb by a spring, and stopper means provided on the cover for normally holding the lever at a position away from the glass bulb. The stopper means is released,
The lever is urged by a spring to strike the glass bulb,
Since the glass bulb is damaged or broken, the operation of the sprinkler head can be automatically accelerated.

Further, the present invention provides a sprinkler head having a glass bulb in which a thermal expansion material is sealed in a glass body and which supports a valve closing a water discharge port, which is provided with a damaging means for damaging the glass bulb in a fire. The glass body is damaged to the extent that it is damaged by the damage means and the strength is reduced, and it is destroyed at an early stage by the heat of fire, so that the operation of the sprinkler head can be accelerated and there is no heat of fire As long as the sprinkler head is not destroyed, it is possible to prevent the sprinkler head from exploding due to an erroneous operation or the like.

Since the above-mentioned damaging means is constituted by a lever which is urged by a spring to strike the glass valve, and a stopper means for restricting the operation of the lever, the restraint of the lever is released by the stopper means. The damage means can be activated.

Further, the lever is provided with a permanent magnet, and a reed switch controlled by the permanent magnet is provided, and the reed switch is actuated by dropping the cover, so that the operation of the sprinkler head is detected and The operation of the sprinkler head can be hastened.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view of the mounting member of FIG. 1;

FIG. 4 is an explanatory view of the damage means of FIG. 3;

FIG. 5 is a longitudinal sectional view of the protector of FIG.

FIG. 6 is an explanatory diagram of the hook of FIG. 1;

FIG. 7 is an operation explanatory diagram of the first embodiment.

FIG. 8 is a longitudinal sectional view of a second embodiment of the present invention.

FIG. 9 is an explanatory view of the damage means of FIG. 8;

FIG. 10 is a longitudinal sectional view of a third embodiment of the present invention.

[Explanation of symbols]

 1,71 Sprinkler head 3,73 Flange 5a, 5b Frame 8 Glass valve 11 Sprinkler head cover 12 Mounting member 21 Damage means 22 Lever part 27 Pin hole 29 Spring 30 Permanent magnet 31a Reed switch 35 Cover member 35a Flange 38,38a Low melting point solder Reference Signs List 41 protector 47 stopper plate 48 spring hook 51 locking pin 52 spiral spring 61 ceiling plate 75 link mechanism 76 solder 77 heat-sensitive plate 81 control unit 82 heater 84 switch 85 actuator

Claims (5)

[Claims] 1. A sprinkler head having a cover which is normally provided so as to cover a lower portion and which is dropped by heat in the event of fire, wherein the heat-sensitive portion of the sprinkler head is heated or damaged or destroyed to control the operation of the sprinkler head. A sprinkler head, characterized in that a means for accelerating is provided, and the means is activated when the cover falls. 2. A sprinkler head which is provided so as to normally cover a lower portion and has a cover which is dropped by heat in the event of fire, comprising: a glass valve for supporting a valve for closing a water discharge port; A sprinkler head provided with a lever provided to be urged toward the glass valve by a spring, and stopper means provided on the cover and always holding the lever at a position away from the glass valve. 3. A sprinkler head having a glass bulb filled with a thermal expansion material and supporting a valve closing a water discharge port, wherein damage means for damaging the glass valve in a fire is provided. Sprinkler head. 4. The sprinkler head according to claim 3, wherein the damaging means comprises a lever which is urged by a spring to strike the glass bulb, and a stopper which restricts the operation of the lever. 5. The sprinkler head according to claim 2, wherein a permanent magnet is provided on the lever, and a reed switch controlled by the permanent magnet is provided.