JP2013081523A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler head that further improves a heat receiving efficiency by getting a wide surface area with a limited space through the use of a plurality of bowl-shaped heat sensitive plates.SOLUTION: The sprinkler head 100 includes: a tubular cylinder 50; a solder 99 installed in the cylinder 50; a first piston 54 for pressurizing the solder 99; a first heat sensitive plate 63 formed in a bowl shape so as to be in direct or indirect contact with the solder 99; and a second heat sensitive plate 61 formed in a bowl shape so as to store the first heat sensitive plate 63 inside.

Description

  The present invention relates to a sprinkler head.

  Some conventional sprinkler heads use a bowl-shaped heat sensitive plate to obtain a large surface area in a limited space and improve heat receiving efficiency. As such, “a male screw 24 is screwed into the lower part of the outer periphery of the holding body 18, and a hook-shaped cover 26 is screwed into the male screw 24 as an air flow blocking member. Has an effect of concealing the heat-sensitive operation part 5 and an effect of preventing a rise in the hot air current due to a fire (see, for example, Patent Document 1).

JP-A-2005-27929

  However, in the conventional sprinkler head as described in Patent Document 1, in consideration of the macro airflow, a part of the airflow hitting the head escapes below the head, and the heat receiving efficiency is high. It was falling.

  The present invention has been made in order to solve the above-described problems. By using a lower heat sensitive plate having a diameter larger than that of other heat sensitive plates, a large surface area can be obtained in a limited space. It is an object of the present invention to provide a sprinkler head that is obtained and has further improved heat receiving efficiency.

  The sprinkler head according to the present invention has a cylindrical cylinder, solder provided in the cylinder, a piston provided in the cylinder and pressing the solder, and a bowl shape so as to be in direct or indirect contact with the solder. A first heat sensitive plate formed; and a second heat sensitive plate connected to the cylinder and formed in a bowl shape so as to accommodate at least a part of the first heat sensitive plate therein.

  The sprinkler head according to the present invention has a piston with a flange formed at the lower end, a solder provided on the flange of the piston, and is attached to the upper part of the solder so as to be in direct or indirect contact with the solder. The formed first heat sensitive plate and the second heat sensitive plate attached to the upper part of the solder, constituting a cylinder for accommodating the solder, and formed in a bowl shape so as to accommodate at least a part of the first heat sensitive plate inside. And.

  According to the sprinkler head according to the present invention, the amount of heat of the airflow escaping downward from the first heat sensitive plate can be received by the second heat sensitive plate, and high sensitivity can be realized.

It is a longitudinal cross-sectional view which shows an example of the cross-sectional structure of the sprinkler head which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the sprinkler head concerning Embodiment 1 of the present invention. It is a disassembled perspective view of the link mechanism of the sprinkler head which concerns on Embodiment 1 of this invention. It is the schematic explaining operation | movement of the sprinkler head which concerns on Embodiment 1 of this invention. It is the schematic which shows some shapes of the 2nd heat sensitive plate of the sprinkler head which concerns on Embodiment 1 of this invention, and a 1st heat sensitive plate. It is a cross-sectional block diagram of the sprinkler head concerning Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows an example of the cross-sectional structure of the sprinkler head which concerns on Embodiment 3 of this invention. It is the schematic explaining operation | movement of the sprinkler head which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view showing an example of a sectional configuration of a sprinkler head 100 according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the sprinkler head 100. FIG. 3 is an exploded perspective view of the link mechanism 40. FIG. 4 is a schematic diagram for explaining the operation of the sprinkler head 100. 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. In FIG. 2, illustration of the second heat sensitive plate 61 and the first heat sensitive plate 63 is omitted.

[Configuration of Sprinkler Head 100]
As shown in FIG. 1, 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 second heat sensitive plate 61, and a first heat sensitive plate 63. Yes.

(Head body 1)
The head main body 1 includes a screw portion provided on the outer periphery, a flange portion 3 provided on the lower end portion of the screw portion, and a screw portion integrally formed with the flange portion 3 on the lower end side outer periphery of the flange portion 3. The water outlet 5 is provided in the central portion so as to pass through the screw portion and the flange portion 3. 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.

(Frame 10)
The frame 10 has a bottomed cylindrical shape, and a screw portion that is screwed into the screw portion of the head main body 1 is provided on the upper portion of the inner wall, and below the screw portion (slightly below the central portion in the height direction). A locking step 12 is formed on the plate. A water spout 15 is formed below the locking step 12 of the frame 10.

(Valve 20)
The valve body 20 opens and closes the water outlet 5 of the head body 1.

(Link mechanism 40)
As shown in FIG. 3, the link mechanism 40 includes a pair of arms 41, an arm support plate 46, a cylinder 50, a first piston 54, a link pressing plate 55, a second piston 59, and the like.

  As shown in FIG. 3, the arm 41 is formed in a substantially inverted J shape, and the leg portion 43 is provided with a first locking hole 44 and a second locking hole 45.

  In addition, the lower surface of the first locking hole 44 provided in the leg portion 43 of the arm 41 is formed as a downward slope from the outside to the inside, and the width of the head 42 is the width of the side wall of the balancer 35. The width of the leg portion of the balancer 35 is formed such that it can be loosely fitted between the guide pieces of the arm guide 30.

  The arm support plate 46 is disposed between the arms 41, and the locking pieces 49 are locked in the first locking holes 44 of the arm 41.

  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 comes into contact therewith, 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 slidably accommodated in the cylinder 50 so as to press the solder 99.

  As shown in FIG. 3, the link retainer 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 fittings projecting on both sides thereof. The fitting piece 58 is formed between the both arms 41 and is loosely fitted into the second locking holes 45 of the both arms 41. 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.

(Second heat sensitive plate 61)
The second heat sensitive plate 61 has substantially the same diameter as the frame 10 and is formed in a bowl shape so that the first heat sensitive plate 63 is accommodated therein. The second heat sensitive plate 61 also serves as a heat receiving plate and is connected to the cylinder 50 to lower the link mechanism 40 and the like. It covers from the side. The second heat sensitive plate 61 has a screw portion 52 (female screw) protruding at the center. A first heat sensitive plate 63 having an opening having a diameter larger than that of the threaded portion 52 is passed through the threaded portion 52 of the cylinder 50, and the threaded portion 52 of the cylinder 50 and the second heat sensitive plate 61 are screwed together. That is, the first heat sensitive plate 63 is fixed so as to be sandwiched between the cylinder 50 and the second heat sensitive plate 61. Thereby, the 2nd heat sensitive board 61 covers the lower surface of the flame | frame 10 or the link mechanism 40, and is fixed. At least a part of the side wall of the second heat sensitive plate 61 is provided with a slit 61a that is an example of an opening.

  The slit 61a functions as an air outlet / inlet for allowing a hot airflow to strike a first heat sensitive plate 63 described later. The second heat sensitive plate 61 may be extended to a height at which the upper end portion covers the water spout 15 of the frame 10. Further, a screw portion 62 into which the screw portion 52 is screwed is provided at the center of the second heat sensitive plate 61. Further, the shape, size, number, formation method and the like of the slit 61a are not particularly limited. The air flow is indicated by arrows in FIG. 1 (arrow A, arrow B). Although the slit 61a has been described as an example of the opening, the shape of the opening is not limited to the slit shape.

(First heat sensitive plate 63)
The first heat sensitive plate 63 is provided in the second heat sensitive plate 61, is indirectly in contact with the solder 99 via the cylinder 50, and is formed in a bowl shape having a smaller diameter than the second heat sensitive plate 61. The first heat sensitive plate 63 may be in direct contact with the solder 99 without using the cylinder 50. The first heat sensitive plate 63 includes a horizontal portion 63a having substantially the same height as the lower portion of the slit 61a of the second heat sensitive plate 61, a vertical portion 63b having substantially the same length as the height of the slit 61a of the second heat sensitive plate 61, have. By doing so, the amount of heat of the air (arrow B) trying to escape below the sprinkler head 100 is received while the amount of heat of the air (arrow A) flowing in from the slit 61a is received by the vertical portion 63b of the first heat sensitive plate 63. Heat can be received by both the bottom surface of the second heat sensitive plate 61 and the lower surface of the horizontal portion 63a of the first heat sensitive plate 63, and the sprinkler head 100 realizes high sensitivity.

  1 shows an example in which the upper part of the first thermal plate 63 is lower than the upper part of the second thermal plate 61 in a state where the second thermal plate 61 and the first thermal plate 63 are attached. However, the shapes of the second heat sensitive plate 61 and the first heat sensitive plate 63 are not limited to those shown in FIG. Variations in the shapes of the second heat sensitive plate 61 and the first heat sensitive plate 63 will be described in detail with reference to FIG.

[Operation of Sprinkler Head 100]
When a fire occurs and the second heat sensitive plate 61 and the first heat sensitive plate 63 are heated, and the solder 99 is heated by the heat and a hot air flow from the periphery, the solder 99 starts to melt, The part flows out from a gap formed between the cylinder 50 and the first piston 54. Therefore, the link mechanism 40 such as the cylinder 50 and the arm support plate 46 fixed to the cylinder 50 is disassembled. Thereby, the link mechanism 40 and the balancer 35 including the second heat sensitive plate 61 and the first heat sensitive plate 63 fall outside.

  At the same time, the arm guide 30 integrated with the valve body 20 is lowered along both side edges of the opening of the frame 10 by its own weight and the pressure of the fire extinguishing water, and the flange portion of the valve body 20 is seated on the bottom of the frame 10. Then, the opening of the frame 10 is closed. Thereby, the water discharge port 5 is opened, and the fire extinguishing water is sprayed almost uniformly from the water spray port 15 through the frame 10.

  FIG. 5 is a schematic view showing some shapes of the second heat sensitive plate 61 and the first heat sensitive plate 63. Based on FIG. 5, the variation of the shape of the 2nd heat sensitive plate 61 and the 1st heat sensitive plate 63 is demonstrated. In addition, in FIG. 5, although the shape of the 2nd thermal plate 61 and the 1st thermal plate 63 is divided and demonstrated to (a)-(d), the 2nd thermal plate 61 and the 1st thermal plate 63 are shown among these. Each may be selected and combined as appropriate. Further, the contents shown in FIG. 5 can be similarly applied to the second embodiment.

  In FIG. 5A, in the state where the second heat sensitive plate 61 and the first heat sensitive plate 63 are attached, the upper portion of the first heat sensitive plate 63 is higher than the upper portion (end position) of the second heat sensitive plate 61. This is shown as an example. In the case of such a positional relationship, since the upper part of the first heat sensitive plate 63 protrudes, the hot airflow that has passed through the slit 61a hits, so that the sensitivity of the sprinkler head 100 can be increased.

  FIG. 5B shows an example in which the height of the slit 61a of the second heat sensitive plate 61 is increased. In this way, it is possible to increase the amount of air flowing into the first heat sensitive plate 63. Therefore, the high sensitivity of the sprinkler head 100 can be further improved.

  FIG. 5C shows a state in which another heat sensitive member 64 a is provided on the horizontal portion 63 a side of the first heat sensitive plate 63. The heat-sensitive member 64a has a tapered shape such that the outer peripheral wall expands upward in a cross-sectional view. In this way, it is possible to increase the surface area that receives the amount of heat of the air that has flowed into the first heat sensitive plate 63. Therefore, the high sensitivity of the sprinkler head 100 can be further improved. The shape of the heat sensitive member 64a is not limited to the shape shown in FIG. For example, the heat sensitive member 64a may be configured in a flat bowl shape. Moreover, you may change the corner | angular part of the heat sensitive member 64a into a curved part.

  FIG. 5D shows a state in which another heat sensitive plate 64 b is provided on the horizontal portion 63 a side of the first heat sensitive plate 63. The heat sensitive plate 64 b is provided so as to extend outward from the horizontal portion 63 a of the first heat sensitive plate 63. In this way, it is possible to increase the surface area that receives the amount of heat of the air that has flowed into the first heat sensitive plate 63. Therefore, the high sensitivity of the sprinkler head 100 can be further improved. The shape of the heat sensitive plate 64b is not limited to the shape shown in FIG. For example, the heat sensitive plate 64b may be constituted by a waved flat plate or may be constituted by being bent several times at a predetermined angle.

  Thus, the horizontal part 63a of the 1st heat sensitive plate 63 should just be in the position which opposes the slit 61a. Moreover, although the same height may be sufficient as the position of the upper part (edge part) of the 1st heat sensitive plate 63 and the 2nd heat sensitive plate 61, if height differs, higher sensitivity can be achieved. When the upper portion of the first heat sensitive plate 63 is located higher than the upper portion of the second heat sensitive plate 61, the upper portion of the first heat sensitive plate 63 protrudes, so that the hot airflow that has passed through the slit 61a hits. High sensitivity can be achieved. On the other hand, when the upper portion of the first heat sensitive plate 63 is located lower than the upper portion of the second heat sensitive plate 61, lowering the position of the upper portion of the first heat sensitive plate 63 reduces the volume of the first heat sensitive plate 63. The heat capacity of the heat sensitive plate 63 is also reduced, and the first heat sensitive plate 63 is easily warmed. Therefore, high sensitivity can be achieved. When the upper part of the first heat sensitive plate 63 is provided at a position lower than the upper part of the second heat sensitive plate 61, the hot airflow passing through the slit 61a is difficult to hit the first heat sensitive plate 63 above the slit 61a, and thus faces the slit 61a. If the upper part of the 1st heat sensitive plate 63 is provided in the position to perform, the hot airflow which passed through the slit 61a can be received efficiently.

[Effects of Embodiment 1]
According to the sprinkler head 100 according to the first embodiment, since the first heat sensitive plate 63 is installed inside the second heat sensitive plate 61, the amount of heat of air that has escaped downward from the sprinkler head 100 is reduced to the second heat sensitive plate. Heat can be received by both the 61 and the first heat sensitive plate 63, and high sensitivity can be realized.

Embodiment 2. FIG.
FIG. 6 is a cross-sectional configuration diagram of a sprinkler head 100 according to Embodiment 2 of the present invention. 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.

(Second heat sensitive plate 61)
The second heat sensitive plate 61 is substantially the same as the diameter of the frame 10, is formed in a disk shape larger than the outer diameter of the first heat sensitive plate 63, and is provided horizontally at the bottom of the heat sensitive plate. The second heat sensitive plate 61 also serves as a heat receiving plate and is connected to the cylinder 50. The second heat sensitive plate 61 has a threaded portion 52 (female thread) projecting at the center. A first heat sensitive plate 63 having an opening having a diameter larger than that of the threaded portion 52 is passed through the threaded portion 52 of the cylinder 50, and the threaded portion 52 of the cylinder 50 and the second heat sensitive plate 61 are screwed together. That is, the first heat sensitive plate 63 is fixed so as to be sandwiched between the cylinder 50 and the second heat sensitive plate 61. Thus, the second heat sensitive plate 61 is provided with a screw portion 62 into which the screw portion 52 is screwed at the center of the second heat sensitive plate 61. The air flow is indicated by arrows in FIG. 6 (arrow A, arrow B).

(First heat sensitive plate 63)
The first heat sensitive plate 63 is provided on the second heat sensitive plate 61, is indirectly in contact with the solder 99 via the cylinder 50, and is formed in a bowl shape having a smaller diameter than the second heat sensitive plate 61. The first heat sensitive plate 63 may be in direct contact with the solder 99 without using the cylinder 50. The first heat sensitive plate 63 has a horizontal portion 63a that is higher than the second heat sensitive plate 61 provided horizontally, and a vertical portion 63b that stands upward from the periphery of the horizontal portion 63a. By doing so, the air (the arrow A) that hits the sprinkler head 100 from the lateral direction is received by the vertical portion 63b of the first heat sensitive plate 63, and the air that tries to escape downward from the sprinkler head 100 ( The amount of heat of arrow B) can be received by both the bottom surface of the second heat sensitive plate 61 and the lower surface of the horizontal portion 63a of the first heat sensitive plate 63, and the sprinkler head 100 realizes high sensitivity.

[Effects of Embodiment 2]
According to the sprinkler head 100 according to the second embodiment, the second heat sensitive plate 61 which is flat and has a diameter larger than that of the first heat sensitive plate 63 is installed at a position below the first heat sensitive plate 63. The hot airflow that has escaped downward from the sprinkler head 100 upon hitting 63 can be received by both the second heat sensitive plate 61 and the first heat sensitive plate 63, and high sensitivity can be realized.

Embodiment 3 FIG.
FIG. 7 is a longitudinal sectional view showing an example of a sectional configuration of a sprinkler head 100A according to Embodiment 3 of the present invention. FIG. 8 is a schematic diagram for explaining the operation of the sprinkler head 100A. The configuration and operation of the sprinkler head 100A will be described with reference to FIGS. In the third embodiment, the description will focus on the differences from the first embodiment described above, and the description of the same parts as in the first embodiment will be omitted. Further, “A” is appended to the end of the reference numerals for members corresponding to the first embodiment.

[Configuration of Sprinkler Head 100A]
The sprinkler head 100A includes a head main body 1A, a frame 10A, a valve body 20A, a sprinkler 110, and a valve body support mechanism 120.

(Head body 1A)
The center portion of the head main body 1A is opened. This opening forms a water discharge port 5A together with a water discharge cylinder 19 described later. A flange portion 3A is formed on the outer peripheral portion of the head main body 1A, and a screw portion connected to a water supply pipe (not shown) is formed on the outer peripheral portion of the head main body 1A above the flange portion 3A. A screw portion for attaching a frame 10A to be described later is formed on the inner peripheral portion below the flange portion 3A. A cylindrical water discharge cylinder 19 is formed on the inner side of the head main body 1A so as to protrude downward. Further, a flat valve seat 7A, for example, is formed at the lower end of the water discharge cylinder 19, and is arranged so that the upper surface side of the disc spring 32 contacts the valve seat 7A. In the head main body 1A, a substantially hole-shaped or ring-shaped space 18 is formed between the lower inner peripheral portion of the flange portion 3A and the water discharge cylinder 19, and a guide rod described later is formed in this space 18. 112 is stored.

(Frame 10A)
The frame 10A is formed in a cylindrical shape. A screw portion is formed on the outer peripheral portion of the upper portion of the frame 10A, and is attached to the screw portion formed on the lower side of the head main body 1A. A locking step portion 12A protruding inward is provided at the lower portion of the frame 10A, and a ball 131 described later is locked to the locking step portion 12A.

(Valve 20A)
The valve body 20A has a flange portion 20bA, and a disc spring 32 is disposed on the upper side of the flange portion 20bA. The disc spring 32 and the water discharge tube 19 of the head main body 1A are blocked. The disc spring 32 is provided with a Teflon (registered trademark) sheet or a Teflon (registered trademark) coating. A head of a set screw 65 described later is in contact with the lower portion of the valve body 20A. 20 A of valve bodies are supported by the valve body support mechanism 120 mentioned later.

(Watering part 110)
The watering part 110 includes a deflector 111, a guide rod 112, and a stopper ring 113 (and a valve body 20A). The deflector 111 is configured by a disc having an opening at the center, and is attached (fixed) to the lower surface of the flange portion 20bA of the valve body 20A in a state where the lower portion of the valve body 20A is inserted into the opening. ing). Further, the deflector 111 is provided with insertion holes (for example, three) into which the guide rods 112 (for example, three) are inserted, and the lower end of the guide rod 112 protrudes from the insertion holes to the deflector 111. It is fixed. Therefore, the valve body 20A, the deflector 111, and the guide rod 112 are integrally configured.

  During normal operation, the stopper ring 113 is in the position shown in FIG. 7, but during the water discharge operation, the deflector 111, the guide rod 112 and the stopper ring 113 are lowered. The outer diameter of the stopper ring 113 is formed to be larger than the inner diameter of the locking step portion 12A of the frame 10A, and when the valve body support mechanism 120 drops during the water discharge operation, the stopper ring 113 extends to the locking step portion 12A of the frame 10A. Descend.

  The inner diameter of the hole provided in the center of the stopper ring 113 is formed to be slightly larger than the outer diameter of the water discharge cylinder 19, and a guide portion protruding downward may be provided on the peripheral edge of the hole. . When the stopper ring 113 is lowered, the stopper ring 113 is guided by the guide portion to the outer periphery of the water discharge tube 19 formed at the lower portion of the head main body 1A.

(Valve support mechanism 120)
The valve body support mechanism 120 includes a heat sensitive part 121, a ball holding mechanism 130, and a set screw 65.

  The heat sensitive part 121 includes a piston 72, a second heat sensitive plate 61A, a first heat sensitive plate 63A, and a heat insulating material 74. The piston 72 is formed in a cylindrical shape, and a flange 72a is formed in the lower part. An internal thread 72b is formed inside the piston 72, and the external thread on the leg portion of the set screw 65 is screwed in to couple the two. A donut-shaped solder 99 is inserted from the upper part of the piston 72 and rests on the flange 72 a of the piston 72. Above the solder 99, a second heat sensitive plate 61A having a disk shape and a crank-shaped cross section and constituting a cylinder is provided. That is, the second heat sensitive plate 61A includes a protrusion (vertical portion) 73a covering the solder 99A provided on the flange 72a of the piston 72, and the protrusion 73a, and is orthogonal to the axis of the head body 1A. And a disk portion 73b extending in the direction of the movement.

  The second heat sensitive plate 61A is formed in a bowl shape, serves also as a heat receiving plate, and constitutes a cylinder. The second heat sensitive plate 61A is fixed so as to cover the lower surface of the frame 10A and the like by being screwed into the central portion of the first heat sensitive plate 63A with the screw portion 52 protruding to the central portion. A slit 61aA, which is an example of an opening, is provided on at least a part of the side wall of the second heat sensitive plate 61A. The slit 61aA functions as an air outlet / inlet. The second heat sensitive plate 61A may be extended to a height at which the upper end covers the lower portion of the frame 10A. Further, the shape, size, number, formation method and the like of the slit 61aA are not particularly limited. Although the slit 61aA has been described as an example of the opening, the shape of the opening is not limited to the slit shape.

  A force is applied to the second heat sensitive plate 61A so as to compress the solder 99A by a ball holding mechanism 130 described later. Further, a gap for the solder 99A to flow out is formed between the outer peripheral surface of the flange 72a of the piston 72 and the inner peripheral surface of the second heat sensitive plate 61A (projection 73a).

  The first heat sensitive plate 63A is provided in the second heat sensitive plate 61A, is indirectly in contact with the solder 99 via the second heat sensitive plate 61A constituting the cylinder, and has a bowl shape smaller in diameter than the second heat sensitive plate 61A. Is formed. The first heat sensitive plate 63A may be in direct contact with the solder 99 without the second heat sensitive plate 61A constituting the cylinder. The first heat sensitive plate 63A includes a horizontal portion 63aA having substantially the same height as the lower portion of the slit 61aA of the second heat sensitive plate 61A, and a vertical portion 63bA having substantially the same length as the height of the slit 61aA of the second heat sensitive plate 61A. have. By doing so, the heat quantity of the air flowing in from the slit 61aA is received by the vertical portion 63b of the first heat sensitive plate 63A, and the heat quantity of the air trying to escape downward from the sprinkler head 100A is changed to the bottom surface of the second heat sensitive plate 61A. Heat can be received by both the lower surface of the horizontal portion 63aA of the first heat sensitive plate 63A, and the sprinkler head 100A realizes high sensitivity.

  FIG. 7 shows an example in which the upper portion of the first thermal plate 63A is lower than the upper portion of the second thermal plate 61A in a state where the second thermal plate 61A and the first thermal plate 63A are attached. However, the shapes of the second heat sensitive plate 61A and the first heat sensitive plate 63A are not limited to those shown in FIG. Various variations of the shapes of the second heat sensitive plate 61A and the first heat sensitive plate 63A can be considered as described with reference to FIG.

  A donut-shaped heat insulating material 74 is provided above the first heat sensitive plate 63A so that heat received by the first heat sensitive plate 63A does not escape to the balancer 133 side described later.

  The ball holding mechanism 130 includes a ball 131, a slider 132, and a balancer 133. Since the balancer 133 has a function of pressing the solder 99A, it functions as a piston.

  The lower outer periphery of the ball 131 is locked to the locking step 12A of the frame 10A. In this state, it is the slider 132 that presses the ball 131 from above, and when a force is applied from the slider 132 to the ball 131, a force acts on the ball 131 in the inward direction. The balancer 133 is provided inside the ball 131 and regulates the movement of the ball 131 trying to enter inside the ball 131. Both the slider 132 and the balancer 133 are formed in a disk shape, and there is a through hole in the center, and a set screw 65 passes through the through hole of the balancer 133. The through hole of the balancer 133 is slightly larger than the outer diameter of the set screw 65, and the two are not coupled.

  The balancer 133 has a shape in which a cylindrical portion having a through hole and a disc portion provided above the cylindrical portion are combined. A step portion is formed at the lower outer periphery of the balancer 133. The step portion at the lower outer periphery is configured to contact the step portion at the lower inner periphery of the locking step portion 12A of the frame 10A, and when an external force is applied from the lower side of the balancer 133, Absorb the shock at the part. Further, a stepped portion 133a into which the heat insulating material 74 is fitted protrudes from the lower portion of the cylindrical portion of the balancer 133 around the central through hole, and an inclined portion 133b to which the ball 131 hits the upper portion of the disc portion of the balancer 133. Is formed to protrude.

  A recess 132a is formed in the lower portion of the outer periphery of the slider 132, and the surface of the recess 132a that contacts the ball 131 is formed in a tapered shape (inclined portion) so as to be inclined inwardly downward.

  The spring force of the disc spring 32 is transmitted to the ball 131 through the valve body 20A and the set screw 65 via the slider 132, and a force is applied so that the ball 131 always moves inward. As a result, the balancer 133 is moved downward. A force acts to move it. Therefore, if the solder 99A melts and flows out, the balancer 133 moves downward, and accordingly, the ball 131 enters inside, and the locked state with the locking step portion 12A of the frame 10A is released. The ball holding mechanism 130 falls together with the heat sensitive part 121. If the ball holding mechanism 130 falls, the valve body 20A, the stopper ring 113, etc. which comprise the water sprinkling part 110 will fall in connection with it, and water discharge will be performed.

  The set screw 65 is a bolt composed of a head and a leg, and the lower part of the leg is coupled to the upper part of the piston 72, so that the balancer 133, the slider 132, and the heat sensitive part 121 as the ball holding mechanism 130 are connected. It is integrated.

  In the sprinkler head 100A as described above, in the state of FIG. 7, the water pressure of the fire extinguishing water at the outlet 5A and the assembly load of the parts act on the ball 131, and the ball 131 tends to move inward (center side). However, the movement of the ball 131 is blocked by the balancer 133, and the ball holding mechanism 130 holds the ball 131. In this state, the valve body 20A and the disc spring 32 seal the water outlet 5A of the head body 1A. For this reason, although the pressurized fire extinguishing water is supplied to the sprinkler head 100A, the fire extinguishing water does not leak. Further, in the water sprinkling part 110, the deflector 111 is fixed to the valve body 20A, the guide rod 112 is fixed to the deflector 111, and the guide rod 112 is the head when the valve body 20A seals the water outlet 5A. It is in a state of being housed in the space 18 of the main body 1A.

[Operation of Sprinkler Head 100A]
As shown in FIG. 7, in the monitoring state of the sprinkler head 100A, pressurized fire-extinguishing water is supplied to the water outlet 5A of the head main body 1A, and the pressure of the fire-extinguishing water is applied to the valve body 20A. Yes. When a fire occurs and the hot airflow hits the second heat sensitive plate 61A and the first heat sensitive plate 63A, these are heated, and the heat of the second heat sensitive plate 61A and the first heat sensitive plate 63A is transmitted to the solder 99A. When the solder 99A starts to be heated and melted from the surroundings, the melted solder 99A flows out from the gap formed between the piston 72 and the second heat sensitive plate 61A (projection 73a), and the volume thereof decreases. .

  At this time, the ball 131 pushed from above by the balancer 133 moves inward, but even if the ball 131 moves, the disc spring 32 is pressed against the valve seat 7A, and the valve body 20A and the disc spring 32 are released. The state where the water mouth 5A is blocked is maintained.

  As shown in FIG. 8A, when the solder 99A is melted and flows out, the second heat sensitive plate 61A and the first heat sensitive plate 63A descend in accordance with the amount of the solder 99A flowing out. When the second heat sensitive plate 61A and the first heat sensitive plate 63A are lowered, the heat insulating material 74 and the balancer 133 attached on the second heat sensitive plate 61A and the first heat sensitive plate 63A are lowered.

  As shown in FIG. 8B, when the balancer 133 is lowered, the gap between the balancer 133 and the slider 132 is widened, and the ball 131 biased inwardly passes the inclined portion 133b of the balancer 133 to the inside. Then, the engagement between the locking step 12A of the frame 10A and the ball 131 is released. Thereby, the valve body 20A and the valve body support mechanism 120 are lowered.

  As shown in FIG. 8C, when the valve body support mechanism 120 including the disc spring 32 disposed below the valve body 20A is dropped, the valve body 20A is lowered. As the valve body 20A is lowered, the deflector 111 attached to the valve body 20A, the guide rod 112 attached to the deflector 111, and the stopper ring 113 are lowered. When the guide rod 112 is lowered, the stopper ring 113 is locked to the locking step portion 12A of the frame 10A, and the valve body 20A and the deflector 111 are suspended from the frame 10A by the guide rod 112.

  In the third embodiment, during the water discharge operation, the deflector 111 descends together with the guide rod 112, so that the descending operation of the deflector 111 is smoothly performed.

  As described above, when the valve body 20A is lowered, the water outlet 5A is opened, and the pressurized fire extinguishing water is sprayed from the deflector 111 to extinguish the fire.

[Effects of the sprinkler head 100A]
According to the sprinkler head 100A according to the third embodiment, since the first heat sensitive plate 63A is installed inside the second heat sensitive plate 61A, the amount of heat of air that has escaped downward from the sprinkler head 100A is reduced to the second heat sensitive plate. Heat can be received by both 61A and the first heat sensitive plate 63A, and high sensitivity can be realized.

  DESCRIPTION OF SYMBOLS 1 Head main body, 1A Head main body, 3 flange part, 3A flange part, 5 water outlet, 5A water outlet, 6 recessed part, 7 valve seat, 7A valve seat, 10 frame, 10A frame, 12 locking step part, 12A locking Step part, 15 Water spout, 18 space, 19 Water discharge pipe, 20 Valve body, 20A Valve body, 20a Valve body, 20b Flange part, 20bA Flange part, 20c Caulking piece, 21 Protruding part, 23 Upper surface, 23a Packing, 30 arm Guide, 32 Disc spring, 35 Balancer, 40 Link mechanism, 41 Arm, 42 Head, 43 Leg, 44 First locking hole, 45 Second locking hole, 46 Arm support plate, 47 Main body, 48 Through Hole, 49 Locking piece, 50 cylinder, 51 collar part, 52 threaded part, 54 1st piston, 55 link presser plate, 56 body, 57 Hole, 58 mating piece, 59 second piston, 60 threaded portion, 61 second heat sensitive plate, 61A second heat sensitive plate, 61a slit, 61aA slit, 62 threaded portion, 63 first heat sensitive plate, 63A first heat sensitive plate , 63a Horizontal part, 63aA Horizontal part, 63b Vertical part, 63bA Vertical part, 64a Thermal member, 64b Thermal plate, 65 Set screw, 72 Piston, 72a Flange, 72b Female thread, 73a Protruding part, 73b Disc part, 74 Thermal insulation , 99 solder, 99A solder, 100 sprinkler head, 100A sprinkler head, 110 sprinkler, 111 deflector, 112 guide rod, 113 stopper ring, 120 valve body support mechanism, 121 heat sensitive part, 130 ball holding mechanism, 131 ball, 132 slider 132a recess, 133 Lancer, 133a stepped portion, 133b inclined portion.

Claims (4)

A cylindrical cylinder;
Solder provided in the cylinder;
A piston provided in the cylinder and pressing the solder;
A first heat sensitive plate formed in a bowl shape so as to directly or indirectly contact the solder;
A second heat sensitive plate connected to the cylinder and formed in a bowl shape so as to accommodate at least part of the first heat sensitive plate;
A sprinkler head comprising: A piston with a flange formed at the lower end;
Solder provided on the flange of the piston;
A first heat sensitive plate attached to the top of the solder so as to be in direct or indirect contact with the solder and formed in a bowl shape;
A second heat sensitive plate attached to the upper part of the solder, constituting a cylinder for accommodating the solder, and formed in a bowl shape so as to accommodate at least a part of the first heat sensitive plate;
A sprinkler head comprising: An opening is provided in at least a part of the side wall of the second heat sensitive plate,
The first heat sensitive plate is:
A horizontal portion having substantially the same height as the lower portion of the opening,
A vertical portion having a length substantially the same as the height of the opening;
The sprinkler head according to claim 1, comprising: A cylindrical cylinder;
Solder provided in the cylinder;
A piston provided in the cylinder and pressing the solder;
A first heat sensitive plate formed in a bowl shape so as to directly or indirectly contact the solder;
A second heat sensitive plate connected to the cylinder and formed in a plate shape larger than the outer diameter of the first heat sensitive plate;
A sprinkler head comprising:

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