JP6306900B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head that extinguishes a fire.

  The sprinkler head includes a valve body that closes the water outlet and a thermal decomposition section (link mechanism) that supports the valve body. In the thermal decomposition part, a heat sensitive body that is melted by heat at the time of a fire is installed, and the thermal decomposition part is constituted by a mechanism that decomposes by melting the heat sensitive body.

  In general, solder is used for the heat sensitive body. For solder, a material that is not very suitable for the environment, such as lead (Pb), indium (In), and cadmium (Cd), is used. Therefore, a heat-sensitive body of a sprinkler head that does not adversely affect the environment has been proposed using a resin instead of solder (see Patent Document 1).

JP 2005-230025 A

  Among resins, there are resins that melt more rapidly than solder at a constant temperature (that is, higher sensitivity), and resins that have a smaller change over time with respect to the assembly load of the sprinkler head applied to the heat sensitive body than solder.

  However, there are many unstable resins such as those that sublime. If an unstable resin is used as a heat-sensitive body, the sprinkler head may malfunction, so such an unstable resin is used as a heat-sensitive body of a sprinkler head as described in Patent Document 1. I couldn't.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a sprinkler head using an unstable resin as a heat sensitive body of the sprinkler head.

  The present invention relates to a sprinkler head having a cylindrical cylinder, a pellet of an organic compound as a heat sensitive body housed in the cylinder, and a piston that presses the heat sensitive body, and is sandwiched between the piston and the pellet. A pellet covering member is provided which covers the pellet so as to seal the pellet in the cylinder, and the pellet covering member is made of a soluble alloy.

  Since the present invention is configured to cover a pellet made of an organic compound, which is a heat sensitive body, with a pellet covering member and seal the pellet in a cylinder, even if the pellet is an unstable organic compound, it is stable for a long period of time. Therefore, the function as a heat sensitive body can be maintained and the sprinkler head can be operated normally.

It is a longitudinal cross-sectional view of the sprinkler head which concerns on Embodiment 1 and 2 which concerns on this invention. It is a partial expanded sectional view of the principal part (part surrounded by the ellipse of the chain line of Drawing 1) of Embodiment 1 concerning the present invention. It is a partial expanded sectional view of the principal part (part surrounded by the ellipse of the chain line of Drawing 1) of Embodiment 2 concerning the present invention. It is a longitudinal cross-sectional view of the sprinkler head which concerns on Embodiment 3 and 4 which concerns on this invention. It is a partial expanded sectional view of the principal part (part enclosed by the ellipse of the chain line of FIG. 4) of Embodiment 3 which concerns on this invention. It is a partial expanded sectional view of the principal part (part enclosed by the ellipse of the chain line of FIG. 4) of Embodiment 4 which concerns on this invention.

  The basic configuration and operation of the sprinkler head 100 will be described with reference to FIGS. 1 and 2, and then the configuration according to the present invention will be described in detail. In addition, in the following drawings including FIG. 1, the magnitude | size relationship between each structural member is not limited, and may differ from an actual thing. Further, the upper and lower sides in the following drawings correspond to the upper and lower sides as viewed from the page. Furthermore, in the following description, the time when the sprinkler head does not perform the water discharging operation is referred to as normal time or monitoring time.

Embodiment 1
<Configuration of Sprinkler Head 100>
A basic configuration of the sprinkler head 100 will be described with reference to FIG.
In FIG. 1, 11 is a main body. The main body 11 is provided with a water discharge port 12 penetrating vertically, and a first screw portion 13 having, for example, a male screw shape for connection to piping is provided on the upper outer periphery. Further, a flange portion 14 is provided at the lower portion, and a second screw portion 15 having, for example, a female screw shape is provided below the flange portion 14.

  21 is a cylindrical frame. The frame 21 is provided with a male screw 22 at an upper portion thereof and is screwed to the second screw portion 15 of the flange portion 14. A pair of slits 23 for adjusting the load are provided below the male screw 22 so as to face each other. Further, an annular engagement portion 24 that engages upper portions of arms 61a and 61b described later is provided inside the lower portion.

  31 is a deflector. The deflector 31 is provided with a substantially oval hole at the center thereof, and a plurality of watering claw pieces (not shown) are bent at a predetermined angle on the circumferential side. A plurality of, for example, three guide rods 34 (not shown) are erected on the deflector 31, and the upper end of the guide rod 34 is locked to a stopper ring 35 for stopping the lowering of the deflector 31 at a predetermined position.

  41 is a valve body. The valve body 41 is provided with a convex portion 42 that enters the water discharge port 12 on the upper surface side, a projecting portion 43 on the lower surface, and a plurality of, for example, a pair of bent pieces 44 on the outer side.

  Reference numeral 51 denotes an arm guide substrate. The substrate 51 includes a long plate-like portion and a disc portion at the center thereof, and a hole through which the protruding portion 43 of the valve body 41 and the bent piece 44 are inserted is provided at the center portion of the disc portion. The bent piece 44 is connected to the lower surface of the valve body 41 by bending. Reference numeral 52 denotes a pair of guide pieces 52 (only one of the pair is shown in FIG. 1) provided on both long sides of the substrate 51. The guide piece 52 is guided and lowered by the inner wall of the hole of the deflector 31 when activated by a fire. Therefore, normally, as shown in FIG. 1, the lower end of the guide piece 52 has a length (height) protruding slightly downward from the deflector 31. The substrate 51 and the guide piece 52 constitute an arm guide.

  56 is a balancer. The balancer 56 includes a long plate portion and bent portions (not shown) in which the long sides on both sides thereof are bent downward. A concave portion is provided in the central portion of the long plate portion, and the protruding portion 43 of the valve body 41 is in contact with the concave portion.

  The arm 61a and the arm 61b are formed such that the upper part is bent in an arc shape and is bent (inclined) in a direction away from a cylinder described later from the upper part to the lower part. doing. A first locking portion 62 and a second locking portion 63 are provided in order from the bottom below the arms 61a and 61b.

  The arm support plate 65 has a locking piece whose both ends are bent obliquely downward, and is disposed between the arm 61a and the arm 61b, and each locking piece of the arm support plate 65 is the arm 61a, The arm 61b is locked to the first locking portion 62, respectively.

  81 is a cylinder. The cylinder 81 has a bottomed cylindrical shape having an annular flange on the outer periphery of the upper end, and a male screw 82 is provided on the bottom surface of the bottom wall. Reference numeral 84 denotes a heat sensitive body that is placed on the bottom of the cylinder 81 and melts at a predetermined temperature. Reference numeral 85 denotes a bottomed cylindrical first piston that is loosely fitted to the cylinder 81 and presses the heat sensitive body 84. The cylinder 81 and the first piston 85 are provided so as to form a gap S1 (see FIG. 2) through which the heat sensitive body 84 flows out. The heat sensitive body 84 according to the present invention will be described in detail later.

  86 is a link pressing plate. The link pressing plate 86 has a plate-like portion with a female screw provided in the center, and both ends of the plate-like portion and the second locking portion 63 are loosely fitted.

  Reference numeral 88 denotes a second piston. The second piston 88 includes an upper male screw portion and a lower rod portion that are screwed into the female screw of the link pressing plate 86, and the tip of the rod portion presses the bottom wall of the first piston 85.

  Reference numeral 91 denotes a heat sensitive plate, a first heat sensitive plate having a flange shape with a male screw 82 inserted in a hole in the center of the bottom wall, a second heat sensitive plate having a disk shape in which a male screw 82 is inserted in a central hole, and a disk shape. And a third heat sensitive plate provided under the second heat sensitive plate. The heat sensitive plate 91 efficiently receives the hot air flow at the time of a fire, thereby improving the heat receiving efficiency of the heat sensitive body 84.

  In addition, the thermal decomposition part consisting of the arms 61a and 61b, the arm support plate 65, the link pressing plate 86, the cylinder 81, the first piston 85, the second piston 88, and the thermal body 84 is called a link mechanism, and in a monitoring state, The link mechanism supports the valve body 41 to seal the water discharge port 12.

<Description of Operation of Sprinkler Head 100>
The basic operation of the sprinkler head 100 during a fire will be described with reference to FIG.

  When a fire occurs and the heat sensitive body 84 begins to melt, the melted heat sensitive body 84 is pushed by the first piston 85 and flows out from the gap S1 between the cylinder 81 and the first piston 85 to the outside. As a result, the arm 61a starts to rotate right and its lower end side starts to move leftward in FIG. 1, and the arm 61b starts to rotate leftward and its lower end side starts to move rightward in FIG. To do.

  That is, due to the slight melting of the heat sensitive body 84, the engagement between the second engaging portion 63 of the arm 61a and the arm 61b and the link pressing plate 86 is released, and the link mechanism is disassembled. Thereby, each component which comprises a link mechanism falls below. Note that the link mechanism is a thermal decomposition unit including the arms 61 a and 61 b, the arm support plate 65, the link pressing plate 86, the cylinder 81, the first piston 85, the second piston 88, and the thermal element 84.

  As the link mechanism is disassembled and dropped, the valve body 41 and the arm guide are guided and lowered by the guide rod 34 of the deflector 31 and the pair of guide pieces 52 that descend in the hole of the deflector 31. Then, the valve body 41 is seated in contact with the upper surface of the deflector 31. Further, the deflector 31 descends as the stopper ring 35 slides in the frame 21. Then, the water discharged from the water outlet 12 collides with the deflector 31 and is sprinkled around the sprinkler head 100.

<About the heat sensitive body 84>
With reference to FIG. 2, the thermal body 84 which concerns on Embodiment 1 of this invention is demonstrated below.

  The heat sensitive body 84 includes a pellet 84a made of a resin which is an example of an organic compound, and a pellet covering member 84b configured to cover the pellet 84a. The pellet 84 a according to Embodiment 1 of the present invention has a cylindrical shape (disc shape) and is accommodated in the cylinder 81. The pellet covering member 84b is disc-shaped solder (an example of a soluble alloy) placed on the upper surface of the pellet 84a in the cylinder 81. In addition, the solder which comprises the pellet coating | coated member 84b is the same material as the solder used as a heat sensitive body of a general sprinkler head.

  The outer diameters of the pellet 84 a and the pellet covering member 84 b are substantially the same as the inner diameter of the cylinder 81. That is, the outer peripheral surface of the pellet covering member 84 b is in contact with the inner peripheral surface of the cylinder 81. That is, the pellet covering member 84b is provided between the gap S1 between the cylinder 81 and the first piston 85 and the pellet 84a, and is configured to close the gap S1 and seal the pellet 84a in the cylinder 81. . As a result, even if the pellet 84a is an unstable substance such as having sublimation properties, the pellet 84a continues to be stably stored in the cylinder 81, and the sprinkler head 100 can normally monitor the fire.

  Moreover, although the thickness of the pellet coating member 84b is appropriately selected, the pellet coating member 84b is formed thinner than the pellet 84a in order to make use of the characteristics of the pellet 84a. The characteristics of the pellet 84a are, for example, creep resistance and high sensitivity as will be described later.

<About pellet 84a>
The pellet 84a is made of a resin that is an example of an organic compound. As the pellet 84a used as the heat sensitive body 84 of the sprinkler head according to the first embodiment of the present invention, a pellet having the following characteristics is used.

  First, the pellet 84a is selected from resins having a melting point of 55 to 190 degrees. The resin used as the material of the pellet 84a is selected from resins that are substantially the same as the melting point of the pellet covering member 84b.

  Thereby, since the pellet 84a and the pellet coating member 84b are melted almost simultaneously, the sprinkler head 100 can be operated at the designed operating temperature without delaying the operation of the sprinkler head 100.

  In the above description, the pellet covering member 84b has substantially the same melting point as that of the pellet 84a. However, the melting point of the pellet covering member 84b may be lower than the melting point of the pellet 84a. In this case, the pellet covering member 84b is melted first. However, since the volume is small, the sprinkler head 100 does not operate if the pellet covering member 84b is melted first. Further, in the case of a fire, the sprinkler head 100 operates faster as much as the pellet covering member 84b is melted first.

  The pellet 84a is formed by compression molding a fine resin powder having a melting point in the above temperature range to a hardness of 1.4 kg to 4.0 kg. Further, a resin having crystallinity has a high hardness and is more suitable as the heat sensitive body 84. When the resin fine powder is compression-molded, it is preferable to screen the resin fine powder in advance to make the particle size of the fine powder uniform. As a result, when compression molding is performed, the density cannot be increased or decreased, and the hardness can be stabilized. Further, by compressing and molding without heating, the moisture does not evaporate and the melting point is difficult to change, so that a compression molded body (pellet 84a) having a melting point as designed can be obtained.

  In addition, the resin selected for the pellet 84a generally has an amount of change with time (creep amount) with respect to the assembly load applied to the first piston 85 and the second piston 88 via the pellet covering member 84b. A resin (that is, a resin having creep resistance) smaller than the solder to be used (that is, the solder of the pellet covering member 84b) is selected. The smaller the amount of change over time with respect to the assembly load, the better. Examples of resins having a small amount of change over time include 2-naphthyl benzoate (the amount of change over time is about half that of solder) and diphenyl phthalate (the amount of change over time). Is approximately 1/6 of the solder), 4-chlorobenzhydrol, and 1,8-octanediol (both of which change with time is approximately 1/5 of the solder).

  In general, the heat-sensitive body of the sprinkler head is pressed by the first piston 85 and the second piston 88, so that an assembly load of about 50 to 100 kgf is applied. For this reason, the heat sensitive body will be deformed (creep) after a long period of time, but if this deformation is large, the sprinkler head will operate even if it is not a fire, so creep should be within a predetermined range. This contributes to prevention of malfunction of the sprinkler head. In addition, the small amount of creep can make the pellet 84a thinner, so that the heat capacity is reduced, the sensitivity is improved, and the sprinkler head 100 is reduced in size.

  In addition, the resin used in the pellet 84a preferably has a sensitivity equal to or higher than that of solder generally used for a heat sensitive body (that is, solder of the pellet covering member 84b). Here, “high sensitivity” means that the temperature range until the heat sensitive body 84 starts melting and the displacement of the heat sensitive body 84 is completed (melting is completed) is narrow. In other words, “high sensitivity” means rapid melting. For example, if the temperature at the melting start point and the temperature at the melting completion point are within the range of 3 ° C., it can be said that the sensitivity is high. . That is, the resin selected for the pellet 84a is a resin in which the temperature range between the melting start point and the melting completion point is narrower than the solder generally used for the heat sensitive body (ie, the solder for the pellet covering member 84b). (That is, a resin having high sensitivity) is selected.

  Examples of such highly sensitive resins include 2-naphthyl benzoate (the above temperature range is about 2 degrees), diphenyl phthalate (the above temperature range is about 2 degrees), 4-chlorobenzhydrol (the above temperature range). Is about 1 degree), salicylic acid (the above temperature range is about 1.5 degree), succinimide (the above temperature range is about 0.2 degree), and the like.

  In addition, regarding the above resin examples and their creep amount and sensitivity, the inventor actually conducted experiments to obtain detailed numerical values.

  Further, the resin used for the pellet 84a does not need to satisfy all of the above characteristics, and is a resin having at least one characteristic superior to the solder generally used for the heat sensitive body (that is, the solder of the pellet covering member 84b). I just need it. For example, a resin having only creep resistance as compared with solder or a resin having only high sensitivity as compared with solder may be used.

  Moreover, since the pellet 84a is sealed in the pellet covering member 84b and the cylinder 81, a resin having sublimation property can be used without any problem. For example, even if the resin has creep resistance but also sublimation, in the first embodiment of the present invention, the pellet 84a does not sublimate and exhibits only creep resistance. become. That is, in the first embodiment, the pellets 84a are sealed in the cylinder 81 by the pellet covering member 84b, so that the sprinkler head 100 can monitor the fire normally even if it is an unstable resin. The characteristics of the organic compound (resin) that are superior to those of the above can be enjoyed.

  In the first embodiment, sublimation is cited as an example of instability of the resin. However, the present invention is not limited to this, and includes, for example, water solubility. In general, when a resin is used as a heat-sensitive body of a sprinkler head for spraying water, it is naturally required that the resin has poor solubility and insolubility in water. In the first embodiment, the pellet 84a is a cylinder. Since it is sealed in 81, there is no problem even if a water-soluble resin is used for the pellet 84a.

  Other examples of instability include low chemical resistance. Low chemical resistance means that it is soluble in organic solvents such as alcohols, acetone, benzene, and toluene. In Embodiment 1, since the pellet 84a is sealed in the cylinder 81, the pellet 84a does not melt into the chemical, and there is no problem even if a resin with low chemical resistance is used for the pellet 84a.

  Table 1 below shows examples of resins that satisfy all or part of the above-described configuration. The left column is the name of the resin, and the right column is the melting point of the resin. The pellet 84a according to the first embodiment of the present invention is selected from the following table, for example.

Embodiment 2
With reference to FIG. 3, the invention according to Embodiment 2 of the present invention will be described below. The second embodiment of the present invention is different from the first embodiment in the configuration of the heat sensitive body 84, and the other basic configurations of the sprinkler head 100 and the operation in the event of a fire are the same. Therefore, in the second embodiment, differences from the first embodiment will be described in detail, and members corresponding to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The pellet 84a according to the second embodiment is a columnar organic compound accommodated in the cylinder 81 as in the first embodiment. The pellet covering member 84b is made of a soluble alloy that entirely coats the periphery of the pellet 84a, and the pellet 84a is not exposed at all. The resin as an example of the organic compound used as the pellet 84a is the same material as that in the first embodiment. That is, in the invention according to the second embodiment of the present invention, in the state where the pellet covering member 84b is coated on the pellet 84a, the outer diameter of the pellet covering member 84b is substantially the same as the inner diameter of the cylinder 81. The outer peripheral surface and the inner peripheral surface of the cylinder 81 are provided in contact with each other.

  Therefore, as in the first embodiment, even if an unstable resin is used as the resin of the pellet 84a, the sprinkler head 100 can normally monitor the fire, and the resin characteristics (creep resistance, High sensitivity) makes the heat sensitive body 84 superior to solder.

Embodiment 3
In the first and second embodiments described above, the sprinkler head using an arm as the link mechanism has been described as an example. However, the third embodiment of the present invention is different from the first and second embodiments in that a ball is used as the link mechanism. The case where it applies to the used sprinkler head 200 is demonstrated.

<Configuration of Sprinkler Head 200>
The basic configuration and operation of the sprinkler head 200 will be described with reference to FIG. In the third embodiment, the link mechanism that is different from the sprinkler head 100 of the first embodiment will be mainly described, and members corresponding to the first embodiment are denoted by the same reference numerals. The description is omitted.

  The sprinkler head 200 includes a head main body 11, a frame 21 connected to the head main body 11, a valve body 41 that closes the water discharge port 12 of the head main body 11, a deflector 31 that constitutes a water sprinkling unit during operation, and a water discharge operation. And a link mechanism (thermal decomposition section) for supporting the valve body 41.

  The frame 21 is formed in a cylindrical shape and is connected to the head body 11. A locking step portion 25 protruding inward is provided at the lower portion of the frame 21, and a ball 71 described later is locked to the locking step portion 25.

  The valve body 41 seals the water discharge port 12 through a disc spring 47 provided on a convex portion on the upper surface of the valve body in a normal state. A head of a set screw 73 described later is pressed against the center of the lower part of the valve body 41. The valve body 41 is supported by a link mechanism.

  A deflector 31 is fixed to the lower part of the valve body 41. A guide rod 34 is connected to the deflector 31, and a stopper ring 35 that is lowered until the guide rod 34 is caught by the locking step portion 25 during a water discharge operation is connected.

  The deflector 31 is configured by a disc having an opening at the center, and is fixed to the lower surface of the flange portion of the valve body 41 with the lower portion of the valve body 41 inserted into the opening. The deflector 31 is provided with insertion holes (for example, three) into which guide rods 34 (for example, three) are inserted. The lower end of the guide rod 34 protrudes from the insertion hole to the deflector 31. It is fixed. Therefore, the valve body 41, the deflector 31, and the guide rod 34 are integrally formed.

  The link mechanism is composed of a heat sensitive part, a ball holding part, and a set screw 77 for fixing various parts constituting the heat sensitive part and the ball holding part, so that the valve body 41 closes the water outlet 12 at normal times. The valve body 41 is supported.

  The heat-sensitive part accommodates the heat-sensitive body 84 that melts by heat, the piston 89 that presses the heat-sensitive body 84, the heat-sensitive plate 91 that transmits the heat of the space where the sprinkler head 200 is installed to the heat-sensitive body 84, the piston 89, and the heat-sensitive body 84. And a cylinder 81 that also functions as a heat sensitive plate.

  The heat sensitive body 84 is melted by heat generated in the event of a fire. The heat sensitive body 84 is described as being formed in a donut shape or the like, but is not limited thereto. The heat sensitive body 84 is inserted from the upper part of the piston 89 and is installed on a flange part of the piston 89 described later. The heat sensitive body 84 according to the present invention will be described in detail later.

  The piston 89 presses the heat sensitive body 84 together with the balancer 75 of the ball holding portion described later. The piston 89 includes a cylindrical portion formed in a cylindrical shape and a flange portion formed in the lower portion of the cylindrical portion. Further, the leg portion of the set screw 77 is screwed into the inner surface of the cylindrical portion, and the piston 89 and the set screw 77 are coupled.

  The piston 89 is coupled and fixed to the set screw 77, while the flange portion of the piston 89 is pressed against the balancer 75 via the heat sensitive plate 91, the cylinder 81, and the heat sensitive body 84. Therefore, the heat sensitive body 84 is pressed by the flange portion of the piston 89 and the cylinder 81.

  The heat sensitive plate 91 transmits heat of the space where the sprinkler head 200 is installed to the heat sensitive body 84. The heat sensitive plate 91 has a substantially donut shape and is configured integrally with a standing portion 81b of a cylinder 81 to be described later.

  The cylinder 81 accommodates a part of the piston 89 and the heat sensitive body 84 and has a function as a heat sensitive plate. This cylinder 81 has a shape in which an opening is formed so that the central portion of the disk-shaped member protrudes upward and the cylindrical portion of the piston 89 is inserted into the central portion. Specifically, the cylinder 81 has a substantially donut shape and forms an upper portion of the cylinder 81, and a cylinder portion that is substantially cylindrical and one of which is connected to the cylinder upper portion 81a and stands vertically. The part 81b is integrally formed. In a normal state, the heat sensitive body 84 is installed in a space formed by the cylinder upper portion 81a and the standing portion 81b of the cylinder 81 and the cylindrical portion and flange portion of the piston 89.

  The standing portion 81 b has a substantially cylindrical shape, and one is connected to the cylinder upper portion 81 a and the other is connected to the heat sensitive plate 91. A heat sensitive member 84 is provided inside the standing portion 81b. That is, the standing portion 81 b covers the side surface portion of the heat sensitive body 84. Here, a gap S <b> 2 (see FIG. 5) through which the molten heat sensitive body 84 flows out is formed between the inner surface of the standing portion 81 b and the flange portion of the piston 89. That is, the melted heat sensitive body 84 mainly flows out from the gap S2. Note that a slight gap S3 (see FIG. 5) is also formed between the cylinder upper portion 81a and the cylindrical portion of the piston 89, and although less than the gap S2, the heat sensitive body 84 flows out.

  Since the cylinder 81 (heat sensitive plate 91) is pressed by the balancer 75, the cylinder 81 (heat sensitive plate 91) presses the upper part of the heat sensitive body 84. As a result, the cylinder 81 (heat sensitive plate 91) is lowered when the heat sensitive member 84 is melted.

  The ball holding portion includes a ball 71 locked to the locking step portion 25, a slider 73 whose lower portion on the outer peripheral side is in contact with the ball 71, and a balancer 75. The balancer 75 presses the cylinder 81. For this reason, the balancer 75 functions as what presses the heat sensitive body 84 by the cylinder 81 and the piston 89.

  The lower portion of the ball 71 is locked in contact with the locking step 25 of the frame 21 and the balancer 75. Further, in this state, since the ball 71 is pressed from above by the slider 73, a force is applied from the slider 73 to the ball 71, and a force acts on the ball 71 in the inward direction. As a result, the ball 71 has a force acting to move the balancer 75 downward.

<Description of Operation of Sprinkler Head 200>
The basic operation of the sprinkler head 200 during a fire will be described with reference to FIG.

  When the heat sensitive body 84 melts due to a fire, the cylinder 81 descends, and as the cylinder 81 descends, the balancer 75 moves downward, and accordingly, the ball 71 enters inside. Thereby, the ball 71 is released from the locked state with the locking step portion 25 of the frame 21, and the link mechanism (ball holding portion and heat sensitive portion) falls. If the ball holding portion falls, the water sprinkling portion composed of the valve body 41 and the deflector 31, the guide rod 34, and the stopper ring 35 falls, and water is discharged.

<About the heat sensitive body 84>
With reference to FIG. 5, the heat sensitive body 84 of the invention which concerns on Embodiment 3 of this invention is demonstrated. In the third embodiment, since the same organic compound as in the first embodiment is used for the pellet 84a, description thereof is omitted.

  The heat sensitive element 84 according to the third embodiment is a resin that is an example of a donut-shaped organic compound, and is a soluble substance composed of a pellet 84a accommodated in the cylinder 81 and a pair (two sheets) of donut-shaped flat plates. It is a solder which is an example of an alloy, and is composed of a pellet covering member 84b housed in a cylinder 81.

  The inner diameter of the pellet 84a and the pair of pellet covering members 84b is substantially the same as the outer diameter of the cylindrical portion of the piston 89, and the inner peripheral surface of the pellet 84a and the pair of pellet covering members 84b is the same as the outer peripheral surface of the cylindrical portion of the piston 89. It touches. Further, the outer diameters of the pellets 84 a and the pair of pellet covering members 84 b are substantially the same as the inner diameters of the standing portions 81 b of the cylinder 81, and the outer peripheral surfaces of the pellets 84 a and the pair of pellet covering members 84 b are It is in contact with the inner peripheral surface of the portion 81b.

  One of the pair of pellet covering members 84b is provided so as to be in contact with the lower surface of the pellet 84a, and the other is provided so as to be in contact with the upper surface of the pellet 84a. In other words, the pellet covering member 84b provided on the lower surface is provided between the pellet 84a and the gap S2 between the inner surface of the standing portion 81b of the cylinder 81 and the flange portion of the piston 89, and on the upper surface. The provided pellet covering member 84b is provided between the pellet 84a and the gap S3 between the cylinder upper portion 81a and the cylindrical portion of the piston 89. That is, among the heat sensitive body 84, the pellet 84a is in contact with the standing portion 81b of the cylinder 81 and the cylindrical portion of the piston 89, and the pellet covering member 84b on the upper surface is the cylinder upper portion 81a, the standing portion 81b of the cylinder 81, and The pellet coating member 84b on the lower surface is in contact with the cylindrical portion of the piston 89, and is in contact with the standing portion 81b of the cylinder 81, the flange portion of the piston 89, and the cylindrical portion. That is, the pellet 84 a is sealed by the pellet covering member 84 b, the cylinder 81, and the piston 89.

  For this reason, even if an unstable resin is used as the resin for the pellet 84a, the sprinkler head 200 can normally monitor the fire, and the characteristics of the resin (creep resistance, high sensitivity) A more excellent heat sensitive body 84 is obtained.

Embodiment 4
With reference to FIG. 6, the invention according to Embodiment 4 of the present invention will be described below. The fourth embodiment of the present invention is different from the third embodiment in the configuration of the heat sensitive body 84, and the other basic configurations of the sprinkler head 200 and the operation in the event of a fire are the same. Therefore, in the fourth embodiment, differences from the above-described third embodiment will be described in detail, and members corresponding to the third embodiment are denoted by the same reference numerals and description thereof is omitted.

  The pellet 84a according to the fourth embodiment is a resin that is an example of a donut-shaped organic compound housed in the cylinder 81, as in the third embodiment. The resin used for the pellet 84a is the same material as in the first embodiment described above. The pellet covering member 84b is a solder that is an example of a fusible alloy. The pellet covering member 84b covers the entire periphery of the pellet 84a so that the pellet 84a is not exposed at all. In the invention according to the fourth embodiment of the present invention, in the state where the pellet covering member 84b is coated on the pellet 84a, the outer diameter of the pellet covering member 84b is substantially the same as the inner diameter of the standing portion 81b of the cylinder 81, It is provided so that the outer peripheral surface of the pellet covering member 84b and the inner peripheral surface of the standing portion 81b of the cylinder 81 are in contact with each other. Further, the inner diameter of the pellet covering member 84b is substantially the same as the outer diameter of the cylindrical portion of the piston 89, and the inner peripheral surface of the pellet covering member 84b and the outer peripheral surface of the cylindrical portion of the piston 89 are in contact.

  Therefore, even if an unstable resin is used as the resin for the pellet 84a, the sprinkler head 200 can normally monitor the fire, and due to the characteristics of the resin (creep resistance, high sensitivity) An excellent heat sensitive body 84 is obtained.

  In the first to fourth embodiments described above, the case of a so-called flash type sprinkler head in which the deflector descends when activated by a fire has been described. However, the present invention is applied to any sprinkler head having a heat sensitive body other than solder. For example, other types of sprinkler heads such as a multi-type can be similarly implemented.

  DESCRIPTION OF SYMBOLS 11 Main body, 12 Water outlet, 14 Flange part, 21 Frame, 23 Slit, 24 Engagement part, 25 Locking step part, 31 Deflector, 34 Guide rod, 35 Stopper ring, 41 Valve body, 42 Convex part, 43 Protrusion part 44, bent plate, disc spring 47, 51 substrate, 52 guide piece, 61a, 61b arm, 62 first locking portion, 63 second locking portion, 65 arm support plate, 71 ball, 73 slider, 75 balancer, 77 Set screw, 81 cylinder, 81a cylinder upper part, 81b standing part, 84 heat sensitive body, 84a pellet, 84b pellet covering member, 85 first piston, 86 link pressing plate, 88 second piston, 89 piston, 91 heat sensitive plate, 100 , 200 Sprinkler head, S1, S2, S3 Clearance.

Claims (3)

In a sprinkler head having a cylindrical cylinder, a cylindrical organic compound pellet as a heat sensitive body accommodated in the cylinder, and a piston that presses the heat sensitive body,
Provided sandwiched between the piston and the pellet, comprising a pellet covering member that covers the pellet so as to seal the pellet in the cylinder,
The pellet covering member is a disk-shaped flat plate made of solder, the outer diameter is substantially the same as the inner diameter of the cylinder, the outer peripheral surface of the pellet covering member is in contact with the inner peripheral surface of the cylinder, and the cylinder and the piston Sprinkler head characterized by closing the gap between the two. In a sprinkler head having a cylindrical cylinder, a donut-shaped organic compound pellet as a heat sensitive body accommodated in the cylinder, and a piston that presses the heat sensitive body,
Provided sandwiched between the piston and the pellet, comprising a pellet covering member that covers the pellet so as to seal the pellet in the cylinder,
The pellet covering member is a pair of donut-shaped flat plates made of solder, and is provided in contact with the upper and lower surfaces of the pellet,
The inner diameter of the pellet covering member is substantially the same as the outer diameter of the piston, and the inner peripheral surface of the pellet covering member and the outer peripheral surface of the piston are in contact with each other,
The sprinkler head according to claim 1, wherein an outer diameter of the pellet covering member is substantially the same as an inner diameter of the cylinder, and an outer peripheral surface of the pellet covering member is in contact with an inner peripheral surface of the cylinder. The pellets are 4-butyryl biphenyl, 1,8-octanediol, 4-chlorobenzhydrol, dicyclohexyl phthalate, palmitic acid, butyl p-hydroxybenzoate, β-methoxynaphthalene, diphenyl phthalate, p-hydroxy Isobutyl benzoate, 9-fluorenone, octa-O-acetyl D-(+)-saccharose, acetoacetate anilide, N-cyclohexyl-p-toluenesulfonamide, propyl p-hydroxybenzoate, 2-naphthyl benzoate, resorcinol, Acetanilide, ethyl p-hydroxybenzoate, succinic anhydride, succinimide, methyl p-hydroxybenzoate, nicotinamide, penta-O-acetyl-β-D-glucopyranose, cinnamic acid, sebacic acid, acetylsalicylic acid, p-toluene The sprinkler head according to claim 1 or 2, wherein the sprinkler head is selected from among lufonamide, benzoin, salicylanilide, adipic acid, salicylic acid, and D-mannitol.