JP6033916B2 - Sprinkler head - Google Patents

Description

  The present invention relates to a sprinkler head.

  A conventional sprinkler head includes a cylinder that accommodates solder and a piston that compresses the solder. The solder is sandwiched between the cylinder and the piston and receives a compressive load. In the event of a fire, heat is transferred from the cylinder to the solder.

Japanese Patent Laid-Open No. 06-178825

  In the technique described in Patent Document 1, the solder is provided in contact with not only the heat-sensitive member that transfers heat generated by the occurrence of a fire to the solder but also the piston. As a result, the heat received from the heat-sensitive member by the solder escapes to the piston, and it may take time to melt the solder.

  That is, in the technique described in Patent Document 1, the efficiency (sensitivity) of melting of the solder is reduced due to the escape of heat transferred to the solder, and the operation of the sprinkler head is slowed in the event of a fire. There was a possibility.

  The present invention has been made to solve the above-described problems, and melts solder with high efficiency (high sensitivity) to suppress slowing of the operation of the sprinkler head in the event of a fire. It is an object.

The present invention is provided between a piston having a flange formed at the lower end, a solder provided on the flange, a cylinder containing the flange and the solder, and the flange and the solder, and heat from the solder to the piston. and a heat insulating member inhibits movement, between the flange outer peripheral surface and the inner circumferential surface of the cylinder of the piston, between the gap molten solder you outflow is formed, insulation, the upper surface of the flange a flat portion provided in contact, consists of a sloped portion having an inclined surface, the inclined portion of the heat insulating member so as to open at least a portion between the gap, and wherein also be provided between gap Is.

  According to the sprinkler head according to the present invention, by providing the heat insulating member, it is possible to suppress the heat received by the solder via the heat sensitive plate at the time of a fire or the like from escaping to the piston. That is, in the sprinkler head according to the present invention, since the heat received by the solder is suppressed from escaping to the piston, the solder is melted with high efficiency (high sensitivity), and the operation of the sprinkler head in the event of a fire, etc. Slowing down can be suppressed.

It is sectional drawing for demonstrating the schematic structure of the sprinkler head which concerns on Embodiment 1 of this invention. FIG. 2 is an exploded perspective view of the sprinkler head illustrated in FIG. 1. FIG. 2 is an exploded perspective view of a link mechanism of the sprinkler head illustrated in FIG. 1. It is operation | movement explanatory drawing of the sprinkler head shown by FIG. It is an enlarged view of the vicinity of the heat insulation member of the sprinkler head illustrated in FIG. It is an enlarged view of the vicinity of the heat insulation member of the sprinkler head 100 which concerns on Embodiment 2 of this invention. It is an enlarged view of the vicinity of the heat insulation member of the sprinkler head 100 which concerns on Embodiment 3 of this invention. It is sectional drawing for demonstrating the schematic structure of the sprinkler head which concerns on Embodiment 4 of this invention. FIG. 9 is an enlarged view of the vicinity of the heat sensitive part of the sprinkler head illustrated in FIG. 8. It is operation | movement explanatory drawing of the sprinkler head shown by FIG. It is an enlarged view of the vicinity of the heat sensitive part of the sprinkler head concerning Embodiment 5 of this invention. It is an enlarged view of the vicinity of the heat sensitive part of the sprinkler head concerning Embodiment 6 of this invention. It is an enlarged view of the vicinity of the heat sensitive part of the sprinkler head concerning Embodiment 7 of this invention.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view for explaining a schematic configuration of a sprinkler head 100 according to the first embodiment. FIG. 2 is an exploded perspective view of the sprinkler head 100 shown in FIG. FIG. 3 is an exploded perspective view of the link mechanism 40 of the sprinkler head 100 shown in FIG. FIG. 4 is an operation explanatory view of the sprinkler head 100 shown in FIG.

  The configuration and operation of the sprinkler head 100 will be described with reference to FIGS. 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 a normal time or a monitoring state.

[Configuration of Sprinkler Head 100]
The sprinkler head 100 includes a head body 1, a frame 10, a valve body 20, an arm guide 30, a balancer 35, a link mechanism 40, a cover 61, and a heat sensitive plate 63.

(Head body 1)
The head main body 1 includes a first screw portion 2 provided on the outer periphery, a flange portion 3 provided integrally with the first screw portion 2 at a lower end portion of the first screw portion 2, and a lower end of the flange portion 3. And a second screw portion 4 formed integrally with the flange portion 3 on the outer periphery of the side. The first screw portion 2, the flange portion 3 and the second screw portion 4 are passed through the center portion and released. A water inlet 5 is provided. And the lower part of the water discharge port 5 is expanded, the recessed part 6 in which the below-mentioned valve body 20 is accommodated is formed, and the valve seat 7 is provided between the water discharge port 5 and the recessed part 6. FIG. Note that the planar shape of the flange portion 3 may be a hexagon or a circle, for example. When the planar shape of the flange portion 3 is circular, a locking portion that is locked by the tightening tool may be provided.

(Frame 10)
The frame 10 has a bottomed cylindrical shape, and has an upper portion provided with a screw portion 11 that is screwed into the second screw portion 4 of the head body 1, and below the screw portion 11 (in the center in the height direction). A locking step 12 is formed slightly further below. A water spout 15 is formed below the locking step 12 of the frame 10. As shown in FIG. 2, the water spouts 15 are formed radially and at equal intervals between the locking step portion 12 and the bottom portion 14, and open to the peripheral wall 13 and the peripheral edge portion of the bottom portion 14. ing. An opening 16 is provided in the bottom 14 of the frame 10.
It should be noted that the width of the locking step portion 12 (projection length toward the center side) is such that the distal ends of the arms 41a and 41b described later are locked so as not to prevent the valve body 20 from dropping when the link mechanism 40 is disassembled. The minimum necessary width.

(Valve 20)
The valve body 20 opens and closes the water discharge port 5 of the head body 1. The valve body 20 a has a smaller diameter than the water discharge port 5 and is inserted into the water discharge port 5. The valve body 20 has a larger diameter than the lower end portion of the water discharge port 5. A flange portion 20b configured integrally with 20a and accommodated in the recess 6, a projection 21 projecting from the lower surface of the flange portion 20b, and a caulking provided concentrically on the outer periphery of the projection 21 It consists of a piece 20c. Note that a packing 23 a made of a metal material such as copper is provided on the upper surface 23 of the valve body 20.

(Arm guide 30)
As shown in FIG. 2, the arm guide 30 is formed by bending a single metal plate, and includes a substrate (not shown) provided parallel to the horizontal plane, and the long side of the substrate. It is comprised by the plate-shaped side wall 32a and the side wall 32b which bent both edge parts below, and is formed in the substantially U shape.

(Link mechanism 40)
The link mechanism 40 includes a pair of arms (arm 41a, arm 41b), an arm support plate 46, a cylinder 50, a first piston 54, a link presser plate 55, a second piston 59, and the like.

  The arm 41a and the arm 41b are formed such that the upper part is bent in an arc shape, and is bent (inclined) in a direction away from a cylinder, which will be described later, from the upper part to the lower part. doing. The lower part of the arm 41a and the arm 41b is provided with a first locking hole 44 and a second locking hole 45 in order from the bottom. Moreover, the lower surface of the 1st locking hole 44 provided in the arm 41a and the arm 41b is formed in the down slope from the outer side toward the inner side.

  As shown in FIG. 3, the arm support plate 46 has a locking piece 49a and a locking piece 49b whose front end portions are bent obliquely downward, and is disposed between the arm 41a and the arm 41b. The locking pieces 49a and 49b are locked in the first locking holes 44 of the arms 41a and 41b.

As shown in FIG. 3, the cylinder 50 is inserted into the through hole 48 of the arm support plate 46 until the collar portion 51 abuts, and is fixed integrally with the arm support plate 46 at that position. Solder 99 made of, for example, compression solder is accommodated in the cylinder 50. The first piston 54 is provided by pressing the solder 99 and is accommodated in the cylinder 50 so as to be movable in the vertical direction. That is, in the state where the first piston 54 is accommodated in the cylinder 50, the gap 95 serving as an outflow path for the solder 99 to flow out between the inner peripheral surface of the cylinder 50 and the outer peripheral surface of the first piston 54. Is formed.
In addition, although the horizontal cross-sectional shape of the cylinder 50 and the 1st piston 54 is not specifically limited, In Embodiment 1, it demonstrates as what is a bottom face circular shape.

  A heat insulating member 90 is provided on the upper surface of the solder 99 so as not to block the gap 95. The heat insulating member 90 will be described in detail later. The gap 95 described in the first embodiment is opened upward.

  As shown in FIG. 3, the link presser plate 55 has a rectangular main body 56 having a screw hole 57 at the center and slightly narrower than the width of the main body 47 of the arm support plate 46, and protrudes from both sides thereof. The fitting piece 58a and the fitting piece 58b are arranged between the arm 41a and the arm 41b, and the fitting piece 58a and the fitting piece 58b are loosened in the second locking holes 45 of the arm 41a and the arm 41b. Fit. The second piston 59 has a screw portion 60 provided at one end screwed into the screw hole 57 of the link presser plate 55 and the other end abutting the first piston 54.

(Cover 61)
The cover 61 also serves as a heat receiving plate and covers the link mechanism 40 and the like from below. The cover 61 is fixed so as to cover the lower surface of the frame 10 and the link mechanism 40 by being screwed into the center portion of the heat sensitive plate 63 of the screw portion 52 protruding to the center portion. Further, a screw part 62 into which the screw part 52 is screwed is provided at the center of the cover 61. The heat received by the cover 61 is transferred to the cylinder 50 and then transferred to the solder 99.

(Thermal plate 63)
The heat sensitive plate 63 is provided below the cover 61 so as to fix the cover 61. The heat received by the heat sensitive plate 63 is transmitted to the cylinder 50 and then to the solder 99.

[Operation of Sprinkler Head 100]
The cover 61 and the heat sensitive plate 63, which also serve as a heat receiving plate, are heated due to the occurrence of a fire, and the solder 99 is heated by the heat and a hot airflow from the surroundings. When the solder 99 starts to melt, a part of the melted solder 99 flows out from the gap 95 formed between the cylinder 50 and the first piston 54. Therefore, the cylinder 50 and the arm support plate 46 fixed to the cylinder 50 ascend in the side wall 32a of the arm guide 30, the cutout part 33a of the side wall 32b, and the cutout part 33b, and both arms 41a, the arm 41b or at least one arm 41a ( Alternatively, the arm 41b) rotates outward with the locking portion of the frame 10 with the locking step portion 12 as a fulcrum.

  As a result, the arm 41a, the arm 41b, or the first locking hole 44 of one arm 41a (or 41b) and the locking piece 49a, the locking piece 49b (or one of them) of the arm support plate 46 are engaged. The link mechanism 40 is disassembled. As a result, the link mechanism 40 and the balancer 35 including the cover 61 fall to the outside from the opening 16 provided in the bottom 14 of the frame 10 (state shown in FIG. 4A).

  At the same time, the arm guide 30 integrated with the valve body 20 has its side walls 32a and 32b descend along the side edges of the opening 16 of the frame 10 due to its own weight and the pressure of the fire extinguishing water. Sits on the bottom 14 of the frame 10 and closes the opening 16 (the state of FIG. 4B). As a result, the water outlet 5 is opened, and the fire extinguishing water is sprinkled from the water spout 15 through the frame 10. At this time, a part of the fire-extinguishing water jumps up and hits the bottom 14 of the frame 10, hits the lower surface of the locking step portion 12, and is sprayed in the downward direction.

FIG. 5 is an enlarged view of the vicinity of the heat insulating member 90 of the sprinkler head 100 illustrated in FIG. 1. The heat insulating member 90 of the sprinkler head 100 will be described with reference to FIG. Note that the arrows in FIG. 5 indicate that the molten solder 99 flows out of the gap 95 (first gap).
The heat insulating member 90 suppresses the heat transmitted to the solder 99 from escaping to the first piston 54. The heat insulating member 90 is provided such that the lower surface thereof is in contact with the upper surface of the solder 99, and the upper surface thereof is provided in contact with the lower surface of the first piston 54. That is, the heat insulating member 90 is sandwiched between the solder 99 and the first piston 54. The heat insulating member 90 illustrated in FIG. 5 is a plate-like member, and is formed so that its planar shape corresponds to, for example, the bottom surface shape of the first piston 54. That is, when the bottom shape of the first piston 54 is circular, the shape of the heat insulating member 90 is a disk shape having the same diameter as the circle. The size of the heat insulating member 90 is substantially the same as or smaller than the size of the first piston 54.

  The heat insulating member 90 is provided so as not to block the gap 95. That is, a gap 95 a (second gap) communicating with the gap 95 is formed between the outer peripheral surface of the heat insulating member 90 and the inner peripheral surface of the cylinder 50. Thus, when the solder 99 is melted, it surely flows out from the gap 95 through the gap 95a.

  The heat insulating member 90 may be made of a metal or resin having a low thermal conductivity. For example, the heat insulating member 90 may be made of engineering plastic, and as such a material, for example, polyphenylene sulfide (PPS) resin may be adopted. The thickness of the heat insulating member 90 is not particularly limited, but may be set to about 2 mm, for example.

The heat insulating member 90 may be formed to have a dent on the surface or to have a rough surface. Thereby, the contact area between the heat insulating member 90 and the first piston 54 is reduced, and the effect of suppressing heat transfer from the solder 99 to the first piston 54 can be further increased. The surface that is indented or roughened may be the surface that contacts the first piston 54 (the upper surface of the heat insulating member 90), or the surface that contacts the solder 99 (the lower surface of the heat insulating member 90). Both sides are acceptable. Further, the surface of the first piston 54 in contact with the solder 99 may be roughened or provided with a dent.
Further, the heat insulating member 90 is not limited to a plate-like member, and may be formed with an opening. That is, the heat insulating member 90 may have a ring shape or the like. Even if the heat insulating member 90 has a ring shape, it is possible to prevent the solder 99 and the first piston 54 from coming into direct contact with each other, and it is possible to prevent heat from moving from the solder 99 to the first piston 54. be able to.

[Effects of the sprinkler head 100 according to the first embodiment]
According to the sprinkler head 100 according to the first embodiment, since the heat insulating member 90 is provided between the first piston 54 and the solder 99, the heat received by the solder 99 escapes to the first piston 54. The solder 99 can be melted with high efficiency (high sensitivity). Thereby, operation | movement of the sprinkler head 100 at the time of fire outbreak etc. can be made quick.

Embodiment 2. FIG.
FIG. 6 is an enlarged view of the vicinity of the heat insulating member 91 of the sprinkler head 100 according to Embodiment 2 of the present invention. Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment.
The heat insulating member 91 is formed with a protrusion 91 a on the side in contact with the first piston 54. Note that the protrusions 91 a formed on the heat insulating member 91 may be formed on the side in contact with the solder 99, or may be formed on both sides. As a result, the contact area between the heat insulating member 91 and the first piston 54 is reduced, so that heat transferred to the solder 99 can be prevented from escaping from the solder 99 to the first piston 54. Further, instead of the heat insulating member 91, a protrusion may be provided on the surface of the surface of the first piston 54 that contacts the solder 99.
In addition, as shown in FIG. 6, the formation positions of the protrusions 91a formed on the heat insulating member 91 may be the central portion and the peripheral portion of the heat insulating member 91, and the heights of all the protrusions 91a may be approximately the same. As a result, the contact between the first piston 54 and the protrusion 91a is stabilized, and the solder 99 can be reliably pressed.

[Effects of the sprinkler head according to Embodiment 2]
In the sprinkler head according to the second embodiment, a protrusion 91 a is formed on the heat insulating member 91, and the contact area between the heat insulating member 91 and the first piston 54 is reduced. As a result, the sprinkler head according to the second embodiment causes the heat transferred to the solder 99 to escape from the solder 99 to the first piston 54 in addition to the effects exhibited by the sprinkler head 100 according to the first embodiment. Can be further suppressed.

Embodiment 3 FIG.
FIG. 7 is an enlarged view of the vicinity of the heat insulating member 92 of the sprinkler head according to the third embodiment. FIG. 7A is a cross-sectional view in the vicinity of the heat insulating member 92. Moreover, FIG.7 (b) is a top view of the heat insulation member 92 illustrated by Fig.7 (a). FIG.7 (c) is sectional drawing in the dotted line T of FIG.7 (b). FIG. 7D is a bottom view of the heat insulating member 92 illustrated in FIG.
7, the interval between the dotted lines T1 corresponds to the diameter of the heat insulating member 92, and the interval between the dotted lines T2 corresponds to the diameter of the opening 92b formed in the heat insulating member 92. Further, the arrow in FIG. 7A indicates that the molten solder 99 flows out of the gap 95 through the heat insulating member 92.

  The solder 99 receives heat from the cylinder 50, but the whole is not necessarily heated uniformly. That is, the temperature of the solder 99 near the contact surface with the cylinder 50 increases faster, and the solder 99 becomes slower as the distance from the cylinder 50 increases. Therefore, if the outflow position of the solder 99 is in the vicinity of the cylinder 50, it gradually flows out from the solder 99 in the vicinity of the contact surface with the cylinder 50, and as a result, it takes several seconds for all of the solder 99 to flow out. Therefore, in the third embodiment, an improvement is made to separate the outflow position of the solder 99 from the vicinity of the cylinder 50. Hereinafter, the third embodiment will be described focusing on the differences from the first and second embodiments.

  The heat insulating member 92 has an opening 92b (first opening) formed at the center of a disk-shaped member, and a groove 92a formed from the opening 92b to the periphery on the surface in contact with the first piston 54. It is. That is, as shown in FIG. 7C, the heat insulating member 92 is formed with a cross-shaped groove 92a on a straight line passing through the opening 92b. And the heat insulation member 92 has a groove | channel formed in parallel with the horizontal surface so that the clearance gap 95 and the said penetration formation position may be connected while being formed by penetration. Thus, the heat insulating member 92 can flow out of the solder 99 from the position far from the inner surface of the cylinder 50 into the gap 95. Specifically, even when the solder 99 close to the inner surface of the cylinder 50 is melted, the solder 99 located far from the cylinder 50 cannot be discharged from the opening 92b and is pressed by the heat insulating material 92. Will remain. When the solder 99 far from the cylinder 50 is melted, all the solder 99 flows out of the gap 95 through the opening 92b and the groove 92a.

FIG. 7 shows an example in which the opening 92b is formed in the central portion of the heat insulating member 92. However, the opening 92b is not limited thereto, and is formed at a position slightly deviated from the central portion. Also good. FIG. 7 shows an example in which one opening 92b is formed, but the present invention is not limited thereto, and a plurality of openings 92b may be formed.
Further, in FIG. 7, an example in which the groove 92a is linearly formed from the opening 92b toward the periphery is illustrated, but the present invention is not limited thereto. That is, the groove 92a may be formed in a curved line as long as the opening 92b and the gap 95 are connected. Moreover, although the thing in which the four groove parts 92a were formed is shown as an example, it is not limited to it.

[Effects of the sprinkler head according to Embodiment 3]
The sprinkler head according to the third embodiment has the following effects in addition to the same effects as the sprinkler head 100 according to the first embodiment.
The sprinkler head according to the third embodiment is provided with a heat insulating member 92 so as to flow into the gap 95 from the solder 99 at a position far from the inner surface of the cylinder 50. Thereby, it can suppress that the valve body 20 (refer FIG. 1) opens the water discharge port 5 gradually. In other words, the operation in which the valve body 20 opens the water outlet 5 is performed at once.
Therefore, the sprinkler head according to Embodiment 3 can suppress the heat transferred to the solder 99 from being taken away by the water leaked by gradually opening the water outlet 5 and preventing melting. That is, the sprinkler head according to Embodiment 3 can reduce the possibility that the operation of the sprinkler head will be delayed.

Embodiment 4 FIG.
The sprinkler head according to the first to third embodiments is configured such that the valve body 20 closes the water discharge port 5 by the action of the arms 41a and 41b. Further, the sprinkler head according to the first to third embodiments has a configuration in which the first piston 54 and the second piston 59 are provided and the solder 99 accommodated in the cylinder 54 is pressed.
On the other hand, the sprinkler head 200 according to the fourth embodiment is configured such that the valve body 130 closes the opening 111 by the action of the valve body support mechanism 150. Further, the sprinkler head 200 according to the fourth embodiment includes a piston 152 (another piston) and is configured to press the solder 155 accommodated in the cylinder 153.
FIG. 8 is a cross-sectional view for explaining a schematic configuration of the sprinkler head 200 according to the fourth embodiment. The configuration and operation of the sprinkler head 200 will be described with reference to FIG. Hereinafter, the fourth embodiment will be described focusing on the differences from the first to third embodiments.

[Configuration of Sprinkler Head 200]
The sprinkler head 200 is discharged from the head main body 110 connected to a pipe through which fire extinguishing water supplied to the sprinkler head 200 flows, the frame 120 connected to the head main body 110, the valve body 130 closing the head main body 110, and the sprinkler head 200. The water spray part 140 which diffuses the fire extinguishing water and the valve body support mechanism 150 which supports the valve body 130 when the water discharge operation is not performed are provided.

(Head body 110)
The head main body 110 is connected to a water supply pipe through which the fire extinguishing water flows, and fire extinguishing water is supplied from the water supply pipe into the sprinkler head 200 via the head main body 110. The head main body 110 has a water discharge port 112 for discharging fire extinguishing water. The water discharge port 112 includes an opening 111 formed at the center of the head main body 110 and a cylindrical water discharge tube 116 formed to protrude downward inside the head main body 110.
A flange 113 is formed on the outer peripheral portion of the head main body 110, and a screw portion 114 connected to the water supply pipe is formed on the outer peripheral portion of the head main body 110 above the flange 113. A threaded portion 115 for attaching the frame 120 is formed on the inner peripheral portion on the side.
On the inner side of the head main body 110, the above-described water discharge tube 116 is formed to protrude downward. Further, a flat valve seat 117 on which a valve body 130 described later is provided is formed at the lower end portion of the water discharge tube 116. In the head body 110, a substantially ring-shaped space 118 is formed between the inner peripheral portion on the lower side of the flange 113 and the water discharge tube 116, and a guide rod 142 described later is accommodated in the space 118. .

(Frame 120)
The frame 120 is formed in a cylindrical shape and is connected to the head main body 110. A screw part 121 is formed on the outer periphery of the upper part of the frame 120 and is attached to the screw part 115 formed on the lower side of the head body 110. A locking step 122 that protrudes inward is provided at the lower portion of the frame 120, and a ball 161 described later is locked to the locking step 122.

(Valve 130)
The valve body 130 prevents fire-extinguishing water from being released from the opening 111 of the head main body 110 at normal times. A concave portion 130 b in which a head of a set screw 165 described later is provided is formed in the central portion of the lower portion of the valve body 130. The valve body 130 is supported by a valve body support mechanism 150.

(Watering part 140)
The water sprinkling part 140 is connected to the deflector 141 fixed to the lower part of the valve body 130, the guide rod 142 connected to the deflector 141, and the guide rod 142, and the stopper ring that descends until it is caught by the locking step part 122 during the water discharging operation. 143.
The deflector 141 is configured by a disc having an opening at the center, and is attached to the lower surface of the valve body flange 130a of the valve body 130 with the lower part of the valve body 130 inserted into the opening (fixed). Have been). In addition, the deflector 141 is provided with insertion holes (for example, three) into which the guide rods 142 (for example, three) are inserted, and the lower end of the guide rod 142 protrudes from the insertion holes to the deflector 141. It is fixed. Therefore, the valve body 130, the deflector 141, and the guide rod 142 are integrally configured.

(Valve support mechanism 150)
The valve body support mechanism 150 supports the valve body 130 so that the valve body 130 closes the opening 111 of the head body 110 in a normal state. The valve body support mechanism 150 includes a heat-sensitive part 151 that transfers heat to the solder 155, a ball holding mechanism 160 provided at the lower part of the frame 120, and a set screw 165 that fixes various components.

Next, with reference to FIG. 9, a schematic configuration of the heat sensitive unit 151 of the sprinkler head 200 will be described. FIG. 9 is an enlarged view of the vicinity of the heat sensitive portion 151 of the sprinkler head 200 shown in FIG.
The heat sensitive part 151 includes a solder 155 that is melted by heat, a piston 152 that presses the solder 155, a heat sensitive plate 172 that transmits heat of a space where the sprinkler head 200 is installed to the solder 155, and heat of the heat sensitive plate 172 to the balancer 163 side. Insulating material 154 for efficiently transmitting to solder 155 by preventing escape and solder 155 are accommodated, and the heat of cylinder 153 that also functions as a heat sensitive plate and solder 155 is prevented from escaping to piston 152 A heat insulating member 193 is provided.
The solder 155 is melted by heat generated in the event of a fire. The solder 155 is described as being formed in a donut shape or the like, but is not limited thereto. The solder 155 is inserted from the upper part of the piston 152 and installed on the heat insulating member 193.

The piston 152 presses the solder 155 together with a balancer 163 of the ball holding mechanism 160 described later. The piston 152 includes a cylindrical portion 152a formed in a cylindrical shape and a flange 152b formed in the lower portion of the cylindrical portion 152a. Further, a female screw 152c is formed on the inner surface of the cylindrical portion 152a, and a male screw 165a on a leg portion of the set screw 165 is screwed into the piston 152 and the set screw 165.
The piston 152 is coupled and fixed to the set screw 165, while the flange 152b is pressed against the balancer 163 via the heat insulating member 154, the heat sensitive plate 172, the cylinder 153, the solder 155, and the heat insulating member 193. ing. Therefore, the solder 155 is pressed by the flange 152b of the piston 152 and the cylinder 153.

The heat sensitive plate 172 transmits heat of the space where the sprinkler head 200 is installed to the solder 155. The heat sensitive plate 172 has a substantially donut shape, and is provided with the cylindrical portion 152a of the piston 152 inserted therein. The heat sensitive plate 172 has an upper surface in contact with the heat insulating material 154 and a lower surface in contact with the cylinder 153.
Further, since the heat sensitive plate 172 is pressed against the balancer 163 via the heat insulating material 154, the heat sensitive plate 172 presses the upper portion of the cylinder 153. Thereby, when the solder 155 is melted, the heat sensitive plate 172 is lowered together with the cylinder 153 and presses the solder 155 with the flange 152b of the piston 152.

  The heat insulating material 154 prevents the heat of the heat sensitive plate 172 from escaping to the balancer 163 side of the ball holding mechanism 160. The heat insulating material 154 has a substantially donut shape, and the upper portion is fitted to the step portion 163 a of the balancer 163 and the lower portion is provided in contact with the heat sensitive plate 172. The heat insulating material 154 is provided by being inserted into the cylindrical portion 152 a of the piston 152. Since the heat insulating material 154 is pressed by the balancer 163, the heat sensitive plate 172 is pressed.

  The cylinder 153 accommodates a part of the piston 152, the solder 155, and the heat insulating member 193, and has a function as a heat sensitive plate. The cylinder 153 has a shape in which a central portion of the disk-shaped member protrudes upward and an opening is formed so that the cylindrical portion 152a of the piston 152 is inserted into the central portion. Specifically, the cylinder 153 has a substantially donut shape and forms an upper portion of the cylinder 153, a cylinder upper portion 153a, a substantially cylindrical shape, one of which is connected to the cylinder upper portion 153a, and a substantially donut shape. The cylinder lower portion 153c connected to the other of the standing portions 153b is integrally formed. In the following description, the cylinder upper portion 153a, the standing portion 153b, and the cylinder lower portion 153c are described as being integrated, but may be separate. Under normal conditions, the solder 155 is installed in a space formed by the cylinder upper portion 153a and the standing portion 153b of the cylinder 153 and the cylindrical portion 152a and the flange 152b of the piston 152.

  The cylinder upper portion 153 a has a substantially donut shape and constitutes the upper portion of the cylinder 153, and is provided so that the lower surface is in contact with the upper surface of the solder 155. A heat sensitive plate 172 is provided on the cylinder upper portion 153 a, and the cylinder upper portion 153 a is pressed against the balancer 163 via the heat sensitive plate 172 and the heat insulating material 154. The outer periphery of the cylinder upper part 153a is connected to the standing part 153b. In addition, an opening is formed at the center of the cylinder upper portion 153a so that the cylindrical portion 152a can be inserted.

  The standing portion 153b has a substantially cylindrical shape, and one is connected to the cylinder upper portion 153a and the other is connected to the cylinder lower portion 153c. Solder 155 is provided inside the standing portion 153b. That is, the standing portion 153 b covers the side surface portion of the solder 155. Here, a gap 153 d (third gap) through which the molten solder 155 flows out is formed between the inner surface of the standing portion 153 b and the flange 152 b of the piston 152. That is, the melted solder 155 can flow out from the gap 153d.

  The cylinder lower portion 153c has a substantially donut shape, and is connected to the other of the standing portions 153b. The cylinder lower portion 153c has a particularly large exposed area in the cylinder 153 with respect to the space where the sprinkler head 200 is installed. Accordingly, the cylinder lower portion 153c can receive a larger amount of heat for melting the solder 155. That is, the cylinder 153 not only accommodates the solder 155 but also has a function as a heat sensitive plate.

  The heat insulating member 193 suppresses the heat of the solder 155 from escaping to the piston 152. The lower surface of the heat insulating member 193 is provided in contact with the flange 152 b of the piston 152, and the upper surface of the heat insulating member 193 is provided in contact with the solder 155. The heat insulating member 193 illustrated in FIG. 9 may have a planar shape corresponding to, for example, the upper surface shape of the flange 152b. That is, when the shape of the upper surface of the flange 152b is a ring shape, the shape of the heat insulating member 193 is preferably a ring shape correspondingly. The shape of the heat insulating member 193 is not limited to the ring shape, and a part of the heat insulating member 193 may be cut.

  The heat insulating member 193 is set so that the outer diameter of the heat insulating member 193 is smaller than the inner diameter of the standing portion 153b. Accordingly, the gap 153d is prevented from being blocked, and the molten solder 155 can surely flow out from the gap 153d. It should be noted that the outer shape of the heat insulating member 193 may be set so as to substantially match the inner diameter of the standing portion 153, but in that case, an appropriate opening is formed at the position of the gap 153d, and the molten solder 155 flows out. It can be so.

(Ball holding mechanism 160)
With reference to FIG. 8 again, a schematic configuration of the ball holding mechanism 160 of the sprinkler head 200 will be described.
The ball holding mechanism 160 (holding portion) presses the ball 161, the slider 162 in which the concave portion 162 a that contacts the ball 161 is formed on the outer peripheral side lower portion, the disc spring 132 provided between the slider 162 and the valve body 130, and the solder 155. The balancer 163 is provided. The balancer 163 presses the cylinder 153 via the heat insulating material 154 and the heat sensitive plate 172. For this reason, the balancer 163 functions as what presses the solder 155 by the cylinder 153 and the piston 152.

  The lower portion of the ball 161 is locked in contact with the locking step 122 of the frame 120 and the balancer 163. Further, in this state, since the ball 161 is pressed from above by the slider 162, a force is applied from the slider 162 to the ball 161, and a force acts on the ball 161 in a direction of entering the inside. In other words, the spring force of the disc spring 132 is transmitted to the ball 161 through the slider 162, and the force is applied so as to always move inward. As a result, the ball 161 is acting so as to move the balancer 163 downward.

  Here, the movement of the ball holding mechanism 160 when the solder 155 melts and flows out will be described. When the solder 155 melts, the balancer 163 moves downward, and the ball 161 enters inside accordingly. As a result, the balancer 163 is released from the locked state with the locking step portion 122 of the frame 120, and the ball holding mechanism 160 falls together with the heat sensitive portion 151. If the ball holding mechanism 160 falls, the valve body 130, the stopper ring 143, etc. which comprise the water sprinkling part 140 will fall in connection with it, and water discharge will be performed.

[Operation of Sprinkler Head 200]
FIG. 10 is an explanatory diagram of the operation of the sprinkler head 200 shown in FIG. The operation of the sprinkler head 200 will be described with reference to FIGS.

  When the sprinkler head 200 is in a monitoring state, pressurized fire extinguishing water is supplied to the water outlet 112 of the head body 110, and the pressure of the fire extinguishing water is applied to the valve body 130 (see FIG. 8). . When a fire occurs and the hot airflow hits the heat sensitive plate 172 and the cylinder 153, the heat is heated, and the heat of the heat sensitive plate 172 and the cylinder 153 is transmitted to the solder 155. At this time, the heat transmitted to the solder 155 is suppressed from escaping to the piston 152 by the heat insulating member 193, and the sensitivity is high.

  When the solder 155 is heated from the surroundings and starts to melt, the heat insulating material 154, the heat sensitive plate 172, and the cylinder 153 are pressed by the balancer 163, so that the heat insulating material 154, the heat sensitive plate 172, and the cylinder 153 are lowered together. . Therefore, when the solder 155 starts to melt, the solder 155 is pressed by the lower surface of the cylinder upper portion 153a of the cylinder 153 and the upper surface of the flange 152b of the piston 152. That is, the facing distance between the lower surface of the cylinder upper portion 153a and the upper surface of the flange 152b is reduced. Then, the melted solder 155 is pressed and flows out from a gap 153 d formed by the standing portion 153 b of the cylinder 153 and the flange 152 b of the piston 152.

  When the solder 155 is melted and flows out from the gap 153d, the heat sensitive plate 172 and the cylinder 153 are lowered in accordance with the amount of the solder 155 flowing out. When the heat sensitive plate 172 and the cylinder 153 are lowered, the heat insulating material 154 and the balancer 163 attached on the heat sensitive plate 172 are lowered. When the balancer 163 is lowered, the gap between the balancer 163 and the slider 162 is widened, and the ball 161 biased inwardly moves beyond the inclined portion 163b of the balancer 163. Thereby, the engagement between the locking step 122 of the frame 120 and the ball 161 is released, and the valve body support mechanism 150 is lowered.

  When the valve body support mechanism 150 is lowered, the valve body 130 is lowered. As the valve body 130 is lowered, the deflector 141 attached to the valve body 130, the guide rod 142 attached to the deflector 141, and the stopper ring 143 are lowered. When the guide rod 142 is lowered, the stopper ring 143 is locked to the locking step portion 122 of the frame 120, and the valve body 130 and the deflector 141 are suspended from the frame 120 by the guide rod 142. When the valve body 130 is lowered, the water outlet 112 is opened, and the pressurized fire extinguishing water is sprayed from the deflector 141 to extinguish the fire.

[Effects of Sprinkler Head 200 According to Embodiment 4]
The sprinkler head 200 according to the fourth embodiment also has the same effect as the first embodiment. That is, in the sprinkler head 200 according to the fourth embodiment, since the heat insulating member 193 is provided between the flange 152b (piston 152) and the solder 155, the heat received by the solder 155 escapes to the flange 152b. Therefore, the solder 155 can be melted with high efficiency (high sensitivity). Thereby, it can suppress that operation | movement of the sprinkler head 200 becomes slow at the time of fire outbreak.

Embodiment 5. FIG.
FIG. 11 is an enlarged view of the vicinity of the heat sensitive part 151 of the sprinkler head according to the fifth embodiment. Hereinafter, the fifth embodiment will be described with a focus on differences from the first to fourth embodiments.
The heat insulating member 194 prevents the heat of the solder 155 from escaping not only to the flange 152b but also to the cylindrical portion 152a. The heat insulating member 194 includes a lower portion 194 a provided in contact with the flange 152 b of the piston 152 and a cylindrical portion 194 b provided in contact with the cylindrical portion 152 a of the piston 152. The heat insulating member 194 can not only prevent the heat of the solder 155 from escaping from the flange 152b of the piston 152 but also suppress the escaping from the cylindrical portion 152a of the piston 152.
The length of the cylindrical portion 194b in the height direction is set so that the upper end of the cylindrical portion 194b is above the cylinder upper portion 153a of the cylinder 153, as shown in FIG. In FIG. 11, the length in the height direction of the cylindrical portion 194 b is illustrated as an example in which the upper end of the cylindrical portion 194 b is set to an intermediate position of the heat insulating material 154. In this case, the inner diameters of the heat sensitive plate 172 and the heat insulating material 154 may be increased by the thickness of the cylindrical portion 194b.

[Effects of Sprinkler Head According to Embodiment 5]
In the sprinkler head according to the fifth embodiment, the heat insulating member 194 has a cylindrical portion 194b. Thereby, in addition to the effect which the sprinkler head 200 concerning Embodiment 4 shows, the sprinkler head concerning Embodiment 5 escapes that the heat transmitted to solder 155 escapes to flange 152b and cylindrical part 152a. Further suppression can be achieved.

Embodiment 6 FIG.
FIG. 12 is an enlarged view of the vicinity of the heat sensitive portion 151 of the sprinkler head according to the sixth embodiment. Hereinafter, the sixth embodiment will be described with a focus on differences from the first to fifth embodiments.
In the sprinkler head according to the sixth embodiment, the flange 152b of the piston 152 and the connecting portion 153t of the cylinder 153 and the connecting portion 153t of the cylinder lower portion 153c are provided close to each other in a normal state. And the heat insulation member 195 is extended and provided between the flange 152b and the connection part 153t.
That is, the sprinkler head according to the sixth embodiment not only suppresses the heat of the solder 155 from escaping to the piston 152 but also the heat transmitted from the cylinder 153 (connection portion 153t) to the solder 155. It is also considered to suppress the escape to (flange 152b).

The heat insulating member 195 includes a flat portion 195a provided in contact with the upper surface of the flange 152b and an inclined portion 195b having an inclined surface. In addition, although the flat part 195a and the inclination part 195b are demonstrated as what is integrated, a separate body may be sufficient.
The flat portion 195a suppresses the heat of the solder 155 from escaping to the flange 152b of the piston 152. The flat portion 195a has a substantially donut shape and is provided on the flange 152b.
The inclined portion 195b suppresses the heat transmitted from the cylinder 153 (connecting portion 153t) to the solder 155 from escaping to the piston 152 (flange 152b). The inclined portion 195b has a substantially donut shape, and is inclined downward in the radial direction from the center toward the outside.
The inclined portion 195b is provided in the gap 153d and blocks heat transfer between the flange 152b and the connection portion 153t. Note that the thickness of the inclined portion 195b is set so that the gap 153d is not blocked by the inclined portion 195b.

[Effects of the sprinkler head according to Embodiment 6]
In the sprinkler head according to the sixth embodiment, in addition to the same effects as the sprinkler head 200 according to the fourth and fifth embodiments, the heat transmitted from the cylinder 153 (connecting portion 153t) to the solder 155 is transferred to the piston 152 (flange 152b). ) Can be prevented from escaping.

Embodiment 7 FIG.
FIG. 13 is an enlarged view of the vicinity of the heat sensitive portion 151 of the sprinkler head according to the seventh embodiment. Hereinafter, the seventh embodiment will be described with a focus on differences from the first to sixth embodiments.
FIG. 13A is a cross-sectional view in the vicinity of the heat insulating member 196. Moreover, FIG.13 (b) is a bottom view of the heat insulation member 196 illustrated by Fig.13 (a). FIG.13 (c) is sectional drawing in the dotted line P of FIG.13 (b). Note that R in FIG. 13 corresponds to the inner diameter of the heat insulating member 196, and r corresponds to the outer diameter of the cylindrical portion 152 a of the piston 152.

  The temperature of the solder 155 near the contact surface with the cylinder 153 increases faster, and as the distance from the cylinder 153 increases, the solder 155 becomes slower. Therefore, as in the third embodiment, the seventh embodiment is also improved in that the outflow position of the solder 155 is separated from the cylinder 153.

The heat insulating member 196 is formed with an opening 196b at the center and a groove 196a from the opening 196b to the peripheral edge on the surface in contact with the flange 152b. The outer diameter of the heat insulating member 196 corresponds to the cross-sectional shape of the inner peripheral surface of the standing portion 153b of the cylinder 153. Further, the inner diameter of the heat insulating member 196 (the diameter of the opening 196b) is slightly larger than the diameter of the cylindrical portion 152a, so that the molten solder 155 can pass therethrough. That is, a gap 196c (fourth gap) is formed between the heat insulating member 196 and the cylindrical portion 152a. As a result, the heat insulating member 196 can flow out from the solder 155 at a position far from the cylinder 153 into the gap 153d.
Specifically, the melted solder 155 flows out from the gap 153d through the gap 196c and the groove 196a. Although FIG. 13 illustrates an example in which the groove 196a is linearly formed from the opening 196b toward the periphery, the present invention is not limited to this. That is, the groove 196a may be formed in a curved line as long as the opening 196b and the gap 153d are connected. Moreover, although the thing in which the four groove parts 196a were formed is illustrated as an example, it is not limited to it.

[Effects of the sprinkler head according to the seventh embodiment]
The sprinkler head according to the seventh embodiment is provided with a heat insulating member 196 so as to flow out from the solder 155 at a position far from the inner surface of the cylinder 153 into the gap 153d. Thereby, it can suppress that the valve body 130 (refer FIG. 8) opens the water discharge port 111 gradually. In other words, the operation in which the valve body 130 opens the water outlet 111 is performed at once.
Therefore, the sprinkler head according to the seventh embodiment can prevent the melting of the solder 155 from being taken away by the water leaked by gradually opening the water discharge port 111 and preventing melting. That is, the sprinkler head according to Embodiment 7 can reduce the possibility that the operation of the sprinkler head will be delayed. Needless to say, the sprinkler head according to the seventh embodiment has the same effects as the sprinkler head 200 according to the fourth to sixth embodiments.

  DESCRIPTION OF SYMBOLS 1 Head main body, 2 1st screw part, 3 Flange part, 4 2nd screw part, 5 Water outlet, 6 Recessed part, 7 Valve seat, 8 Valve (valve body), 10 Frame, 11 Screw part, 12 Locking Step part, 13 peripheral wall, 14 bottom part, 15 water spout, 16 opening part, 20 valve body, 20a valve body, 20b flange part, 20c caulking piece, 21 protrusion part, 23 upper surface, 23a packing, 30 arm guide, 32a, 32b Side wall, 33a, 33b Cut part, 35 Balancer, 36 Substrate, 37 Leg part, 38 Side wall, 39 Recess, 40 Link mechanism, 41a, 41b Arm, 44 First locking hole, 45 Second locking hole 46 Arm Support plate, 47 body, 48 through hole, 49a, 49b locking piece, 50 cylinder, 51 collar, 52 threaded portion, 54 first piston, 55 link presser , 56 body, 57 screw hole, 58a fitting piece, 58b fitting piece, 59 second piston, 60 screw part, 61 cover, 62 screw part, 63 heat sensitive plate, 90 to 92 heat insulating member, 91a protrusion, 92a groove part 92b opening, 95 gap (first gap), 95a gap (second gap), 99 solder, 100 sprinkler head, 110 head body, 111 opening, 112 water outlet, 113 flange, 114, 115 threaded portion, 116 water discharge tube, 117 valve seat, 118 space, 120 frame, 121 screw part, 122 locking step part, 130 valve body, 130a valve body flange, 130b recess, 132 disc spring, 140 watering part, 141 deflector, 142 guide rod , 143 Stopper ring, 143a Guide part, 150 Valve body support mechanism, 151 Thermal Part, 152 piston, 152a cylindrical part, 152b flange, 152c female thread, 153 cylinder, 153a cylinder upper part, 153b standing part, 153c cylinder lower part, 153d gap (third gap), 154 heat insulating material, 155 solder, 160 ball holding Mechanism, 161 Ball, 162 Slider, 162a Recess, 163 Balancer, 163a Step, 163b Inclined part, 165 Set screw, 165a Male thread, 172 Thermal plate, 193-196 Thermal insulation member, 194a Lower part, 194b Cylindrical part, 195a Flat part, 195b inclined part, 196a groove part, 196b opening, 196c gap (fourth gap), 200 sprinkler head.

Claims (2)

A piston with a flange formed at the lower end;
Solder provided on the flange;
A cylinder containing the flange and the solder;
A heat insulating member provided between the flange and the solder and suppressing heat transfer from the solder to the piston, and
Between the outer peripheral surface and the inner peripheral surface of the cylinder of the flange of the piston, between gap wherein the molten solder you outflow is formed,
The heat insulating material comprises a flat portion provided in contact with the upper surface of the flange, and an inclined portion having an inclined surface,
Wherein the inclined portion of the heat insulating member, prior to release at least a portion between Kisuki, sprinkler head, characterized in also provided between front Kisuki. The heat insulating member, sprinkler head of claim 1, wherein a projection on at least one surface of the contact surface and the solder Metropolitan of contact surface with the piston is formed.