JP5320480B2 - Closed fire extinguishing head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closed type fire extinguishing head in which a support which supports a thermosensitive body does not affect the radiation distribution of a fire extinguishing agent, and which is not easily deformed even when the support is undertaken with force from the thermosensitive body. <P>SOLUTION: The closed type fire extinguishing head 1 is equipped with a fire extinguishing head body 10 with a discharge hole 101, a pip cap 11 which is brought into contact with the discharge hole 101 to be freely detached and attached, a thermosensitive body 15 which supports the pip cap 11, a guard frame 12 which supports the thermosensitive body 15, and a ball 13 which is supported by the fire extinguishing head body 10 and supports the guard frame 12. A part of the guard frame 12 projects outward from the fire extinguishing head body 10. A part of the thermosensitive body 15 is exposed outside from the guard frame 12 in either direction nearly perpendicular to the projecting direction of the guard frame 12. In a state that the thermosensitive body 15 is not deformed, the ball 13 is supported from the fire extinguishing head body 10 by the thermosensitive body 15. The guard frame 12 is supported by the ball 13. In the state that the thermosensitive body 15 is deformed, the ball 13 and so on are freely detached and attached from/to the fire extinguishing head body 10. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a closed fire extinguishing head that senses heat from a fire and releases a fire extinguishing agent.

  Conventionally, a closed-type fire extinguishing head that releases a fire extinguishing agent and water from a discharge port when a heat caused by the fire is sensed in the event of a fire has been used. The closed fire extinguishing head is connected to a supply pipe for a fire extinguisher or the like, and is supplied with a fire extinguisher or the like from a fire extinguisher tank, a fire fighting water tank, or a water pipe through the supply pipe. During normal times when no fire has occurred, the valve body is pressed against the discharge port by a heat sensitive body such as a glass bulb or fusible link, and the discharge port is closed. Alternatively, when the valve body is disassembled and separated from the discharge port, the discharge port is opened, and a fire extinguisher or the like is discharged. In such a closed fire extinguishing head, a frame for supporting the heat sensitive body is installed integrally with the main body of the closed fire extinguishing head. The frame extends from the vicinity of the discharge port toward the contact portion between the heat sensitive body and the frame. In addition, a diffusion plate for diffusing a fire extinguisher or the like discharged from the discharge port is provided at a position facing the discharge port in the frame.

  In addition, a closed fire extinguishing head using a foam fire extinguishing agent has been proposed as a closed fire extinguishing head for extinguishing fires such as oil fires that are difficult to extinguish with water or water spray. In this closed-type fire extinguishing head, a foaming net is disposed so as to surround the discharge port of the fire extinguishing agent in order to appropriately foam the fire extinguishing agent, and a guard frame is extended so as to surround the outside of the foaming net. . The valve body pressed against the discharge port is supported by a valve stem member that extends through the foaming net to the outside of the foaming net. The valve stem member is supported by a heat sensitive body, and the heat sensitive body is supported by a guard frame (see, for example, Patent Document 1). When the heat sensing element senses heat at the time of the fire and deforms or disassembles, the valve stem member inserted through the bearing provided on the foaming net slides along the bearing, and the valve is When the body leaves the discharge port, the fire extinguisher is released from the discharge port.

Japanese Patent Laid-Open No. 2001-570

  However, in the above-mentioned structure in which the frame is installed integrally with the main body of the closed fire extinguishing head, when the fire extinguishing agent is discharged from the discharge port, the flame inhibits the emission of the extinguishing agent, and the emission of the extinguishing agent The distribution could be biased.

  Further, the structure for supporting the heat sensitive body, the valve stem member, and the valve body by the guard frame extending so as to surround the outside of the foaming net has the following problems.

(1) Deflection of guard frame In the structure described above, the force applied to the valve body by the internal pressure of the extinguishing agent acts as a bending moment on the guard frame via the valve stem member and the heat sensitive body. When the guard frame is bent by this bending moment and the support point of the heat sensitive body in the guard frame is displaced, a gap is generated between the valve body and the discharge port, which causes leakage of the extinguishing agent. Moreover, in order to suppress such displacement, the rigidity of the guard frame must be greatly improved so that it can withstand the bending moment acting on the guard frame. It was necessary to adopt a cross section or increase the number of guard frames, which was a factor in increasing costs.

(2) Protection of heat sensitive body Further, in the above-described structure, the guard frame extends so as to surround the outside of the foaming net, and is on the side of the heat sensitive body arranged immediately below the foaming net. Since it is not arranged along the direction, it did not have a function of protecting the heat sensitive body. For this reason, when performing the installation work and maintenance work of the said closed-type fire extinguishing head, there existed a possibility of damaging a heat sensitive body accidentally. Further, when a guard for protecting the side of the heat sensitive body is provided separately, it has been a factor of further cost increase.

(3) Increase in cost due to increase in structure In addition, since a large guard frame that can surround the outside of the foaming net is required, the cost has been high.

  The present invention has been made in view of the above, and (1) the support that supports the heat sensitive body does not affect the radiation distribution of the extinguishing agent, and (2) the support is loaded with force from the heat sensitive body. However, it is an object of the present invention to provide a closed fire extinguishing head that is not easily deformed, (3) the heat sensitive element is reliably protected by the support, and (4) the cost can be reduced by downsizing.

In order to solve the above-described problems and achieve the object, a closed fire-extinguishing head according to claim 1 is configured so that a fire-extinguishing head body having a discharge port for discharging a fire-extinguishing agent and the discharge port can be separated from each other. A pressure-contacting valve body, a heat-sensitive body that is deformed at a predetermined temperature and that directly or indirectly supports the valve body in an undeformed state, and the heat-sensitive body in an undeformed state And a linkage that is supported by the fire-extinguishing head main body and supports the support, and the support so that a part of the support projects outward from the fire-extinguishing head main body. A body is disposed on the fire extinguishing head main body, and any part of the heat sensitive body is not obstructed by the support body in any direction substantially perpendicular to the protruding direction of a part of the support body. To be exposed to the outside When the heat sensitive body is disposed on the support and the heat sensitive body is not deformed, the linkage body is supported by the heat sensitive body directly or indirectly so as not to be detached from the fire extinguishing head body, and the support The body is supported by the linkage body, the support body is supported by the linkage body so as not to be detached from the fire extinguishing head main body, and in the state where the heat sensitive body is deformed, the linkage body and the support body are: The fire extinguishing head main body is detachable from the fire extinguishing head main body, and the fire extinguishing head main body is a substantially cylindrical body having a major axis in a direction perpendicular to the opening surface of the discharge port, and a frame extending from the periphery of the discharge port. A step portion is provided on an inner periphery of the frame, and the valve body includes a hook-shaped hooking portion provided on an outer periphery of the valve body, and the heat sensitive body is deformed and the valve body is Detached from the outlet In the said hook portion is hooked by step portion, comprise a substantially disc-shaped deflector which is fixed to the outer periphery of said frame, characterized by.

  Further, the closed fire-extinguishing head according to claim 2 is the closed fire-extinguishing head according to claim 1, wherein a part of the support is formed in a substantially U-shaped side surface, and is substantially U-shaped. The heat sensitive body is disposed in an internal space formed by a part of the support, and the part of the heat sensitive body is in a plane substantially parallel to the substantially U-shaped side surface of the part of the support. It is characterized by projecting outward from a part of the support along a substantially orthogonal direction.

The closed fire-extinguishing head according to claim 3 is the closed fire-extinguishing head according to claim 1 or 2 , wherein the linkage body is a substantially spherical body.

The closed fire-extinguishing head according to claim 4 is the closed fire-extinguishing head according to any one of claims 1 to 3 , wherein the heat sensitive body is a glass bulb.

The closed fire extinguishing head according to claim 5 is the closed fire extinguishing head according to any one of claims 1 to 4 , wherein the valve body seals a gap between the valve body and the discharge port. The O-ring disposed between the discharge port and the valve body, and the valve body disposed between the peripheral edge of the discharge port and the valve body so that the heat sensitive body is not deformed. And a coil spring that abuts against the periphery of the discharge port and exerts an elastic force.

  According to the closed fire-extinguishing head according to claim 1, since the support body is supported by the linkage body in a state where the heat-sensitive body is not deformed, the heat-sensitive body and the valve body can be supported by the support body. The discharge port can be closed by the valve body. Further, when the heat sensitive body is deformed by detecting heat due to the occurrence of a fire, the linkage body is detached from the fire extinguishing head body, and accordingly, the support body that has lost support by the linkage body is also detached from the fire fighting head body. Thereby, since a support body does not exist in the radiation range of a fire extinguishing agent, it can avoid that the said support body influences the radiation distribution of a fire extinguishing agent, and can extinguish a fire extinguishing agent uniformly.

According to the closed fire-extinguishing head according to claim 3 , since the fire-extinguishing head main body and the support body are linked by a substantially spherical linkage body, the linkage body rolls when the heat sensitive body is deformed. Thus, it can be easily detached from the fire extinguishing head main body, and the support body and the pressing body can be smoothly detached from the fire extinguishing head main body.

According to the closed fire extinguishing head of claim 4 , since the glass bulb is used as the heat sensitive body, when the ambient temperature of the closed fire extinguishing head reaches a predetermined temperature due to the occurrence of a fire, the glass bulb is used. Bursts. As a result, the linkage body supported by the glass bulb can be reliably removed from the fire extinguishing head body in the event of a fire, and the support body and valve body can be removed from the closed fire extinguishing head, and the extinguishing agent can be removed from the discharge port. Can be released.

According to the closed fire extinguishing head of claim 5 , since the valve body includes the O-ring and the coil spring, the O-ring is placed on the inner peripheral surface of the discharge port when the heat sensitive body is not deformed. The discharge port can be sealed by pressure contact. Further, if the O-ring is pressed against the inner peripheral surface of the discharge port, the discharge port is kept sealed even if the valve body moves along a direction perpendicular to the opening surface of the discharge port. It is possible to alleviate the installation accuracy requirement of the valve body in the head assembling work, and to reduce the manufacturing cost. Further, when the heat sensitive body is deformed and the support body is removed from the fire extinguishing head body and the valve body is no longer supported from the support body, the valve body is smoothly detached from the discharge port by the elastic force of the coil spring. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the closed fire extinguishing head concerning Embodiment 1 of this invention, Fig.1 (a) is a front view of a closed fire extinguishing head, FIG.1 (b) is a side view of a closed fire extinguishing head, FIG. c) is a bottom view of the closed fire extinguishing head. It is the sectional side view which showed the AA cross section in FIG.1 (b). It is sectional drawing which showed schematically the cross section of the closed type fire extinguishing head 1, and the radiation range of a fire extinguishing agent when a fire extinguishing agent is discharged | emitted from the discharge port. FIG. 4A is a side cross-sectional view of a closed fire extinguishing head according to the second embodiment, FIG. 4A is a cross-sectional view of the closed fire extinguishing head at a normal time, and FIG. 4B is a closed fire extinguishing head at the time of discharging a fire extinguishing agent. FIG. FIG. 5A is a side cross-sectional view of a closed fire extinguishing head according to Embodiment 3, FIG. 5A is a cross-sectional view of the closed fire extinguishing head at a normal time, and FIG. 5B is a closed fire extinguishing head at the time of discharging a fire extinguishing agent. FIG. FIG. 6A is an external view of a closed fire extinguishing head according to Embodiment 4, FIG. 6A is a front view of the closed fire extinguishing head, FIG. 6B is a side view of the closed fire extinguishing head, and FIG. Is a bottom view of the closed fire extinguishing head. FIG. 7B is a side sectional view showing a BB cross section in FIG. 6B, FIG. 7A is a sectional view of the closed fire extinguishing head 1 in a normal state, and FIG. 7B is a closed type in discharging a fire extinguishing agent. It is sectional drawing of the fire extinguishing head.

  Embodiments of a closed fire extinguishing head according to the present invention will be described below in detail with reference to the accompanying drawings. [I] First, the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] Finally, modifications to each embodiment were explained. To do. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The closed-type fire extinguishing head according to each embodiment is intended to release heat extinguishing agent by sensing heat due to the occurrence of a fire.

  The installation target of the closed fire extinguishing head according to each embodiment is arbitrary. For example, the closed fire extinguishing head can be installed in a large-scale building such as a factory facility or a building, an underground mall, or a kitchen of a general house.

  One of the features of the closed fire extinguishing head according to each embodiment is that a support body that supports the heat sensitive body is provided separately from the main body of the closed fire fighting head. A link body is provided to link the main body of the closed fire extinguishing head to support the support body. The linkage body is supported by the heat sensitive body directly or indirectly so that it cannot be detached from the main body of the closed fire extinguishing head when the heat sensitive body is not deformed. Detach from the head body. Therefore, when the heat sensitive body is deformed by detecting heat due to the occurrence of a fire, the linkage body is detached from the main body of the closed fire extinguishing head, and the support body that has lost support by the linkage body is also attached to the closed fire extinguishing head. Leave. Thereby, it can avoid that a support body affects the radiation distribution of a fire extinguisher, and can extinguish a fire extinguisher uniformly.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment according to the present invention will be described.

[Embodiment 1]
First, the first embodiment will be described. This form is a basic form provided with a linkage.

(Configuration of closed fire extinguishing head)
First, the configuration of the closed fire extinguishing head will be described. FIG. 1 is an external view of a closed fire extinguishing head according to Embodiment 1, FIG. 1 (a) is a front view of the closed fire extinguishing head, FIG. 1 (b) is a side view of the closed fire extinguishing head, and FIG. c) is a bottom view of the closed fire extinguishing head. FIG. 2 is a side sectional view showing the AA section in FIG. As shown in FIGS. 1 and 2, the closed fire extinguishing head 1 includes a fire extinguishing head main body 10, a pip cap 11, a guard frame 12, a ball 13, a push ring 14, a heat sensitive body 15, and a deflector 16.

(Configuration of closed fire extinguishing head—fire extinguishing head body 10)
The fire-extinguishing head main body 10 is a portion that is the basis of the closed fire-extinguishing head 1, and includes a connection portion 100, a discharge port 101, and a frame 102. The connection part 100 is a part into which the extinguishing agent flows into the closed fire extinguishing head 1, and is connected to a fire extinguishing agent supply pipe (not shown). The outer periphery of the connection part 100 is formed, for example, as a pipe taper screw, and is screwed into a fire extinguishing agent supply pipe. The discharge port 101 is an opening through which a fire extinguisher that has flowed into the connection unit 100 from the supply pipe is discharged. Although the shape of the discharge port 101 is arbitrary, for example, it is formed as a circular opening. The frame 102 supports a ball 13 and a deflector 16 described later. The frame 102 is a substantially cylindrical body having a first direction orthogonal to the opening surface of the discharge port 101 as a major axis direction, and extends from the periphery of the discharge port 101. In the cylindrical wall of the frame 102, a plurality of radiation paths 103, which are openings for allowing the fire extinguishing agent to radiate uniformly in a plane parallel to the opening surface of the discharge port 101, are formed. Further, a stepped portion 104 for supporting a ball 13 described later is provided on the inner periphery of the frame 102. The method of fixing the frame 102 in the fire extinguishing head main body 10 is arbitrary, and the frame 102 may be fixed by screwing to a screw portion provided on the outer periphery of the discharge port 101, or The frame 102 may be provided integrally.

(Configuration of closed fire extinguishing head-pip cap 11)
The pip cap 11 is for press-contacting the discharge port 101 to close the discharge port 101, and corresponds to the valve body in the claims. The pip cap 11 is in pressure contact with the discharge port 101 along a direction in which the first direction and the major axis direction of the pip cap 11 substantially coincide with each other on the inner peripheral side of the frame 102. The configuration and shape of the pip cap 11 are arbitrary. For example, as shown in FIG. 2, the pip cap 11 includes a pip cap main body 110, a spring seal 111, and a latching portion 112. The pip cap body 110 is a substantially cylindrical body, and a substantially hemispherical top portion 113 to be inserted into the discharge port 101 is provided at one end of the pip cap body 110. The spring seal 111 is normally pressed against the peripheral edge of the discharge port 101 and seals the discharge port 101. In the event of a fire, the spring seal 111 separates the pip cap 11 from the discharge port 101 by its elastic force. It corresponds to a substantially conical leaf spring in which the seal member and the elastic body in the range are integrated. The spring seal 111 is provided at a portion adjacent to the top portion 113 on the outer periphery of the pip cap body 110. The material and the configuration of the spring seal 111 are arbitrary. For example, the spring seal 111 can be formed as a plate spring having sealing properties by coating a substantially conical plate spring made of metal with resin. The hook 112 is a housing provided adjacent to the spring seal 111 on the outer periphery of the pip cap body 110. The latch 112 is supported by a guard frame 12 described later in a state where the heat sensitive body 15 described later is not deformed, and the frame 102 in a state where the heat sensitive body 15 is deformed and the pip cap 11 is detached from the discharge port 101. It is hooked by the step part 104 of. Moreover, the outer periphery of the latching | locking part 112 and the inner periphery of the flame | frame 102 are arrange | positioned at predetermined intervals, and are arrange | positioned mutually non-contactingly.

(Configuration of closed fire extinguishing head-guard frame 12)
The guard frame 12 supports a heat sensitive body 15 described later and presses the heat sensitive body 15 toward a push ring 14 described later, and presses the pip cap 11 against the discharge port 101. Corresponds to the support in the range. The guard frame 12 includes a guard frame main body 120, a retaining hole 121, and an impress screw 122. The guard frame main body 120 is arranged on the inner peripheral side of the frame 102 so that the major axis direction of the guard frame main body 120 substantially coincides with the first direction, and the end of the pip cap 11 at the end on the discharge port 101 side. The pip cap 11 is supported by coming into contact with the latching portion 112, and the heat sensitive body 15 is supported by the discharge port 101 and the end on the opposite side. Further, the major axis direction of the guard frame main body 120 and the major axis direction of the heat sensitive body 15 substantially coincide with each other, and the guard frame main body 120 is arranged along the heat sensitive body 15 on the side of the heat sensitive body 15. . The retaining hole 121 is an opening formed in the side surface of the guard frame 12 in a direction substantially orthogonal to the major axis direction of the guard frame 12, and a ball 13 described later is fitted into the retaining hole 121. Is included. Here, the thickness of the guard frame 12 at the periphery of the retaining hole 121 is formed to be smaller than the diameter of the ball 13. As a result, in a state where the guard frame 12 is latched by the ball 13, a part of the ball 13 can be protruded from the latch hole 121, so that the ball 13 can be stepped on the stepped portion 104 of the frame 102 and a push ring 14 described later. The contact portion 141 can be brought into contact with the contact portion 141. The impress screw 122 adjusts the interval between the heat sensitive body 15 and the push ring 14 when the heat sensitive body 15 is attached, and contacts the heat sensitive body 15 to press the heat sensitive body 15 toward the push ring 14. The upper and lower holes of the guard frame 12 are screwed so as to be movable up and down.

  In addition, although the specific shape of the guard frame 12 is arbitrary, as shown in FIG. 2, for example, the guard frame main body 120 can be formed as a shape in which a substantially cylindrical body 120a and a substantially U-shaped body 120b are combined. . In this case, the end surface of the substantially cylindrical body 120 a is in contact with the latching portion 112 of the pip cap 11. A retaining hole 121 is formed in the cylindrical wall of the substantially cylindrical body 120a. Further, the heat sensitive body 15 is supported by an impress screw 122 inserted in the bottom of the substantially U-shaped body 120b.

(Configuration of closed fire extinguishing head-ball 13)
The ball 13 is pressed against the inner periphery of the frame 102 by a push ring 14 which will be described later, and is supported by the stepped portion 104 of the frame 102, thereby linking the frame 102 and the guard frame 12 to each other. The frame 12 is supported and corresponds to the linkage body in the claims. The shape of the ball 13 is arbitrary, but the ball 13 may be formed as a substantially spherical body, or the ball 13 may be formed as a substantially cylindrical body. Details of the linkage between the ball 13 and other components will be described later.

(Configuration of closed fire extinguishing head-push ring 14)
The push ring 14 is supported by a heat sensitive body 15 to be described later, and abuts against the ball 13 to press the ball 13 against the inner periphery of the frame 102. The push ring 14 corresponds to the pressing body in the claims. ing. The push ring 14 is formed as a substantially cylindrical body, and is disposed on the inner peripheral side of the frame 102 so that the major axis direction of the substantially cylindrical body is along the first direction. The push ring 14 includes the bottom portion 140 and the contact portion 141. I have. The bottom portion 140 is a recess into which the heat sensitive body 15 is fitted, and is provided at an end portion on the opposite side of the discharge port 101 among both end portions of the push ring 14. The abutting portion 141 is a portion that abuts on a ball 13 described later, and is formed on the outer periphery of the push ring 14 as a substantially conical body whose outer diameter increases as the distance from the discharge port 101 increases.

(Configuration of closed fire extinguishing head-heat sensitive body 15)
The heat sensitive body 15 is fitted to the push ring 14 and presses the push ring 14 against the ball 13 in a room temperature environment where no fire has occurred. When heat due to the occurrence of a fire is detected, the heat sensitive body 15 is deformed, so that the guard frame 12, the ball 13 and the push ring 14 are detached from the fire extinguishing head body 10, and the pip cap 11 is released accordingly. The discharge port 101 is released from the outlet 101. Although the specific shape of the heat sensitive body 15 is arbitrary, it is formed as a substantially cylindrical body as shown in FIG. 1, for example, and the end on the discharge port 101 side is fitted to the push ring 14, The opposite end is supported by the guard frame 12. Moreover, the specific structure of the heat sensitive body 15 is arbitrary, For example, the glass valve which is a glass container which enclosed the volatile liquid can be used. In this case, when the liquid sealed in the glass bulb reaches a predetermined temperature, the glass bulb bursts without being able to withstand the pressure of the liquid that increases with the temperature. Thereby, the heat by the occurrence of a fire can be sensed. Alternatively, a fusible link using an alloy that melts and deforms at a predetermined temperature may be used.

(Structure of closed fire extinguishing head-deflector 16)
The deflector 16 diffuses the extinguishing agent emitted from the emission port 101 and emitted from the radiation path 103. The deflector 16 is formed as a substantially circular plate, and is fixed to the frame 102 so as to be substantially parallel to the opening surface of the discharge port 101. A method of fixing the deflector 16 to the frame 102 is arbitrary. For example, a fitting hole 160 provided in the center of the deflector 16 may be fitted to the outer periphery of the frame 102 and fixed to the frame 102 using a retaining ring 161. it can. Alternatively, the inner periphery of the deflector 16 and the outer periphery of the frame 102 may be threaded portions, and the deflector 16 may be fixed to the frame 102 by screwing.

(Operation of closed fire extinguishing head-normal operation)
Next, the operation of the closed fire extinguishing head 1 having the above-described configuration will be described. First, the normal time when no fire has occurred will be described.

  At normal times, as shown in FIG. 2, the pip cap 11 is pressed toward the discharge port 101 by the guard frame 12 in contact with the latching portion 112, and the spring seal 111 of the pip cap 11 is against the discharge port 101. Are in pressure contact. In this way, the spring seal 111 is pressed against the periphery of the discharge port 101, thereby sealing the discharge port 101.

  The guard frame 12 receives a force in a direction away from the discharge port 101 along the first direction by the pip cap 11 receiving the internal pressure due to the extinguishing agent, and abuts on the retaining hole 121 of the guard frame 12. The ball 13 is pressed away from the discharge port 101.

  Further, the heat sensitive body 15 is fitted to the bottom portion 140 of the push ring 14 and presses the push ring 14 toward the discharge port 101. The push ring 14 pressed from the heat sensitive body 15 is in contact with the ball 13 at the contact portion 141 and presses the ball 13. Here, as described above, the contact portion 141 is formed as a substantially conical body whose outer diameter increases as the distance from the discharge port 101 increases. Therefore, when the push ring 14 is pressed toward the discharge port 101 by the heat sensitive body 15, the ball 13 is pressed toward the discharge port 101 by the contact portion 141 and is pressed toward the inner periphery of the frame 102. The The ball 13 pressed in this manner protrudes from the retaining hole 121 of the guard frame 12 in which the ball 13 is fitted to the inner peripheral side of the frame 102 and is pressed against the inner periphery of the frame 102. Here, since the ball 13 is pressed by the guard frame 12 in a direction away from the discharge port 101 as described above, the ball 13 is pressed against the stepped portion 104 of the frame 102 and supported by the stepped portion 104.

  As described above, the ball 13 is supported by the push ring 14 and the frame 102 and supports the guard frame 12. Therefore, the guard frame 12 is fixed to the frame 102, and the pip cap 11 and the heat sensitive body 15 are supported by the fixed guard frame 12.

(Operation of closed fire extinguishing head-in case of fire)
Next, the operation of the closed fire extinguishing head 1 when a fire occurs will be described. FIG. 3 is a cross-sectional view schematically showing the cross section of the closed fire extinguishing head 1 and the radiation range of the extinguishing agent when the extinguishing agent is discharged from the discharge port 101.

  As shown in FIG. 3, when the heat sensitive body 15 is deformed by detecting heat due to the occurrence of a fire, the heat sensitive body 15 cannot press the push ring 14. When the push ring 14 is no longer pressed from the heat sensitive body 15, the push ring 14 falls off from the inner peripheral side of the frame 102, and the pressing force applied to the ball 13 from the push ring 14 is lost. As a result, the ball 13 is not pressed against the inner periphery of the frame 102, is detached from the frame 102, and falls off from the retaining hole 121 of the guard frame 12.

  When the ball 13 falls off the frame 102, the guard frame 12 supported by the ball 13 in contact with the hooking hole 121 also loses support and falls off the frame 102. When the guard frame 12 that has pressed the pip cap 11 toward the discharge port 101 is dropped, the pip cap 11 is pressed by the elastic force of the spring seal 111 and the internal pressure of the extinguishing agent, and is pushed out from the discharge port 101. . The pip cap 11 detached from the discharge port 101 is latched by the step 104 at a position where the latch 112 is in contact with the step 104 of the frame 102.

  The fire extinguisher discharged from the discharge port 101 when the pip cap 11 is released hits the deflector 16 by hitting the top 113 of the pip cap 11 or directly passing through the radiation path 103. The fire extinguishing agent that has hit the deflector 16 is uniformly distributed in a plane parallel to the deflector 16 and radiated around the closed fire extinguishing head 1. The fire extinguisher radiated around the closed fire extinguishing head 1 is radiated while being affected by gravity. When a fire extinguisher is discharged vertically downward from the discharge port 101, the fire extinguisher radiated from the closed fire extinguishing head 1 is radiated in a bell shape while spreading in the horizontal direction. At this time, since the guard frame 12, the ball 13, the push ring 14, and the heat sensitive body 15 have already dropped from the frame 102 and do not exist within the radiation range of the extinguishing agent, these components are made of the extinguishing agent. Does not affect the radiation distribution.

(Effect of Embodiment 1)
Thus, according to Embodiment 1, since the guard frame 12 is supported by the ball 13 when the heat sensitive body 15 is not deformed, the heat sensitive body 15 and the pip cap 11 are supported by the guard frame 12. The discharge port 101 can be closed by the pip cap 11. Further, when the heat sensitive body 15 is deformed by detecting heat due to the occurrence of a fire, the ball 13 is detached from the frame 102, and the guard frame 12 that has lost support by the ball 13 is also detached from the frame 102. Thereby, since the guard frame 12 does not exist within the radiation range of the extinguishing agent, it can be avoided that the guard frame 12 affects the radiation distribution of the extinguishing agent, and the extinguishing agent can be radiated uniformly. it can.

  In the state where the heat sensitive body 15 is not deformed, the heat sensitive body 15 presses the push ring 14 against the ball 13, and the ball 13 is pressed against the inner periphery of the frame 102 by the push ring 14. The ball 13 can be supported by the stepped portion 104 of 102. Thereby, the ball 13 can be fixed to the frame 102, and the guard frame 12 can be supported by the ball 13.

  Further, since the pip cap 11 is provided with the spring seal 111, when the heat sensitive body 15 is not deformed, the release port 101 is sealed by pressing the spring seal 111 having a sealing property against the periphery of the discharge port 101. can do. Further, when the heat sensitive body 15 is deformed and the guard frame 12 is removed from the frame 102 and the pip cap 11 is not supported from the guard frame 12, the pip cap 11 is smoothly moved by the elastic force of the spring seal 111. It can be detached from the discharge port 101. Furthermore, since the spring seal 111 in which the seal member and the elastic body are integrated is used, the structure can be simplified and the number of parts can be reduced, and the cost can be reduced.

  Further, since the frame 102 and the guard frame 12 are linked by the ball 13 which is a substantially spherical body, when the heat sensitive body 15 is deformed, the ball 13 can be rolled and easily detached from the frame 102. The guard frame 12 and the push ring 14 can be smoothly removed from the frame 102.

  Further, since the glass bulb is used as the heat sensitive body 15, when the ambient temperature of the closed fire extinguishing head 1 reaches a predetermined temperature due to the occurrence of a fire, the glass bulb is ruptured. As a result, the push ring 14 supported by the glass bulb can be reliably dropped from the frame 102 in the event of a fire, and the pip cap 11, the guard frame 12, and the ball 13 can be dropped from the closed fire extinguishing head 1, A fire extinguisher can be discharged from the discharge port 101.

[Embodiment 2]
Next, a second embodiment will be described. In this form, the support body supports the linkage body so as not to be detached from the fire extinguishing head body.

  First, the configuration of the closed fire extinguishing head will be described. FIG. 4 is a side sectional view of the closed fire extinguishing head according to the second embodiment. FIG. 4 (a) is a sectional view of the closed fire extinguishing head in a normal state, and FIG. It is sectional drawing of a closed type fire extinguishing head. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of closed fire extinguishing head-pip cap 11)
As shown in FIG. 4, the closed fire extinguishing head 1 according to the second embodiment does not include the push ring 14. The heat sensitive body 15 supports the pip cap 11 instead of the push ring 14, and the pip cap 11 supports the ball 13. The pip cap 11 includes a bottom portion 114 and a ball support portion 115. The bottom 114 is a recess into which the heat sensitive body 15 is fitted, and is provided at the end opposite to the top 113 out of both ends of the pip cap body 110. The ball support portion 115 is a substantially cylindrical body having the first direction as the major axis direction, and is provided adjacent to the latching portion 112 and surrounding the pip cap body 110. Further, the outer periphery of the pip cap body 110 and the inner periphery of the ball support portion 115 are installed at a predetermined interval. A support hole 116 is formed in the cylindrical wall of the ball support portion 115, and the ball 13 is fitted into the support hole 116. Here, the thickness of the ball support 115 at the periphery of the support hole 116 is formed to be smaller than the diameter of the ball 13. Thereby, in a state where the ball support portion 115 supports the ball 13, a part of the ball 13 can be protruded from the support hole 116, so that the stepped portion 123 of the guard frame 12 and the stepped portion of the frame 102 are described later. It can be brought into contact with the portion 104.

(Configuration of closed fire extinguishing head-guard frame 12)
Unlike the first embodiment, the guard frame 12 is not in contact with the pip cap 11 in the second embodiment. The guard frame 12 supports the heat sensitive body 15 and presses the heat sensitive body 15 toward the pip cap 11, and abuts against the ball 13 to press the ball 13 against the inner periphery of the frame 102. The step portion 123 is provided. The stepped portion 123 is formed as a substantially conical body whose outer diameter decreases on the outer periphery of the end portion on the discharge port 101 side in the guard frame main body 120 as the distance from the discharge port 101 increases.

(Operation of closed fire extinguishing head-normal operation)
Next, the operation of the closed fire extinguishing head 1 having the above-described configuration will be described. First, the normal time when no fire has occurred will be described.

  At normal times, as shown in FIG. 4A, the heat sensitive body 15 is fitted to the bottom 114 of the pip cap body 110 and presses the pip cap 11 toward the discharge port 101. The pip cap 11 pressed by the heat sensitive body 15 is in contact with the ball 13 fitted in the support hole 116 in the support hole 116 and supports the ball 13.

  The pip cap 11 pressed against the discharge port 101 and receiving the internal pressure of the fire extinguishing agent presses the heat sensitive body 15 in a direction away from the discharge port 101. The heat sensitive body 15 pressed from the pip cap 11 applies a force in a direction away from the discharge port 101 along the first direction to the guard frame 12 supporting the heat sensitive body 15. The guard frame 12 loaded with a force from the heat sensitive body 15 contacts the ball 13 at the step portion 123 and is supported by the ball 13. Here, as described above, the stepped portion 123 is formed as a substantially conical body whose outer diameter decreases as the distance from the discharge port 101 increases. Therefore, when the guard frame 12 is applied with a force in a direction away from the discharge port 101 by the heat sensitive body 15, the ball 13 is pressed in a direction away from the discharge port 101 by the step portion 123 of the guard frame 12, and the inside of the frame 102 is It is pressed toward the circumference. The ball 13 pressed in this manner protrudes from the support hole 116 of the pip cap 11 into which the ball 13 is inserted to the inner peripheral side of the frame 102, is pressed against the step portion 104 of the frame 102, and the step portion 104 Supported by.

  As described above, the ball 13 is supported by the pip cap 11 and the frame 102 and supports the guard frame 12. Therefore, the guard frame 12 is fixed to the frame 102, the heat sensitive body 15 is supported by the fixed guard frame 12, and the pip cap 11 is supported by the heat sensitive body 15.

(Operation of closed fire extinguishing head-in case of fire)
Next, the operation of the closed fire extinguishing head 1 when a fire occurs will be described. As shown in FIG. 4B, when the heat sensitive body 15 is deformed by detecting heat due to the occurrence of a fire, the pip cap 11 is not pressed from the heat sensitive body 15 toward the discharge port 101. Therefore, the pip cap 11 is pushed out from the discharge port 101 by the elastic force of the spring seal 111 and the internal pressure of the extinguishing agent. The pip cap 11 detached from the discharge port 101 is latched by the step 104 at a position where the latch 112 is in contact with the step 104 of the frame 102. As the pip cap 11 is detached from the discharge port 101, the ball 13 fitted in the support hole 116 of the pip cap 11 is pressed in a direction away from the discharge port 101 by the support hole 116. Normally, the ball 13 is pressed toward the inner periphery of the frame 102 by the step portion 123 of the guard frame 12 and supported by the step portion 104 of the frame 102 as described above. When the heat sensitive body 15 that applied a force in the direction away from the discharge port 101 is deformed with respect to 12, the pressing force with which the guard frame 12 presses the ball 13 toward the inner periphery of the frame 102 is reduced. . Accordingly, the ball 13 is pressed by the peripheral edge portion of the support hole 116 with a force exceeding the pressing force by the guard frame 12, is detached from the frame 102, and is dropped from the support hole 116. When the ball 13 falls off the frame 102 in this way, the guard frame 12 supported by the ball 13 at the stepped portion 123 also loses support and falls off the frame 102.

(Effect of Embodiment 2)
As described above, according to the second embodiment, the guard frame 12 presses the ball 13 against the inner periphery of the frame 102 when the heat sensitive body 15 is not deformed. 13 can be supported. Thereby, the ball 13 can be fixed to the frame 102, and the guard frame 12 can be supported by the ball 13.

[Embodiment 3]
Next, Embodiment 3 will be described. This form is a form provided with an O-ring and a coil spring.

  First, the configuration of the closed fire extinguishing head will be described. FIG. 5 is a side sectional view of the closed fire extinguishing head according to the third embodiment. FIG. 5A is a sectional view of the closed fire extinguishing head in a normal state, and FIG. It is sectional drawing of a closed type fire extinguishing head. The configuration of the third embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of closed fire extinguishing head-pip cap 11)
In the third embodiment, the pip cap 11 includes an O-ring 117 and a coil spring 118. The O-ring 117 is for sealing the gap between the discharge port 101 and the pip cap 11 in a normal state. The O-ring 117 is fitted and installed in a groove provided on the outer periphery of the top portion 113 of the pip cap 11. When the pip cap 11 is fitted into the discharge port 101, the O-ring 117 is connected to the discharge port 101. It arrange | positions so that it may contact | abut to the internal peripheral surface. The coil spring 118 is for detaching the pip cap 11 from the discharge port 101 by its elastic force when the heat sensitive body 15 is deformed in the event of a fire. The coil spring 118 is disposed so as to surround the top portion 113 between the hook portion 112 and the discharge port 101.

(Operation of closed fire extinguishing head-normal operation)
Next, the operation of the closed fire extinguishing head 1 having the above-described configuration will be described. First, the normal time when no fire has occurred will be described.

  At normal times, as shown in FIG. 5A, the O-ring 117 installed on the outer periphery of the top portion 113 of the pip cap 11 is pressed against the inner peripheral surface of the discharge port 101, so that the discharge port 101 is sealed. Has been. Further, the pip cap 11 is pressed toward the discharge port 101 by the guard frame 12, and the coil spring 118 is compressed between the hook 112 and the discharge port 101.

(Operation of closed fire extinguishing head-in case of fire)
Next, the operation of the closed fire extinguishing head 1 when a fire occurs will be described. As shown in FIG. 5B, when the heat sensitive body 15 is deformed by detecting heat due to the occurrence of a fire, the pip cap 11 is not pressed from the heat sensitive body 15 toward the discharge port 101. Therefore, the pip cap 11 is pushed out from the discharge port 101 by the elastic force of the coil spring 118 and the internal pressure of the extinguishing agent. In this case, the frictional force between the O-ring 117 and the inner peripheral surface of the discharge port 101 acts as a resistance force against the detachment of the pip cap 11 from the discharge port 101, but the elastic force of the coil spring 118 and the force due to the internal pressure of the extinguishing agent Since the frictional force is sufficiently small as compared with the sum of the above, the pip cap 11 is smoothly detached from the discharge port 101.

(Effect of Embodiment 3)
As described above, according to the third embodiment, the pip cap 11 includes the O-ring 117 and the coil spring 118. Therefore, when the heat sensitive body 15 is not deformed, the O-ring 117 is connected to the inner peripheral surface of the discharge port 101. The discharge port 101 can be hermetically sealed by being pressed against. Further, if the O-ring 117 is in pressure contact with the inner peripheral surface of the discharge port 101, the discharge port 101 is kept sealed even when the pip cap 11 moves along the first direction. The requirement for installation accuracy of the pip cap 11 in one assembly operation can be relaxed, and the manufacturing cost can be reduced. Further, when the heat sensitive body 15 is deformed and the guard frame 12 is detached from the frame 102 and the pip cap 11 is no longer supported from the guard frame 12, the pip cap 11 is smoothly moved by the elastic force of the coil spring 118. It can be detached from the discharge port 101.

[Embodiment 4]
Next, a fourth embodiment will be described. This form is a form provided with a net. As described above, in a conventional closed-type fire extinguishing head provided with a mesh body, a support body extended so as to surround the exterior of the mesh body is bent, so that a gap is formed between the valve body and the discharge port. There was a problem that fire extinguishing agent leaked. Further, since the support does not have a function of protecting the heat sensitive member, there is a problem that the heat sensitive member may be damaged during the work, or there is a problem that the cost increases due to an increase in size of the structure. The closed fire extinguishing head according to the fourth embodiment solves these problems.

  First, the configuration of the closed fire extinguishing head will be described. 6A and 6B are external views of the closed fire extinguishing head according to the fourth embodiment. FIG. 6A is a front view of the closed fire extinguishing head, and FIG. 6B is a side view of the closed fire extinguishing head. 6 (c) is a bottom view of the closed fire extinguishing head. FIG. 7 is a side sectional view showing a BB section in FIG. 6B, FIG. 7A is a sectional view of the closed fire extinguishing head 1 in a normal state, and FIG. 7B is a fire extinguishing agent. It is sectional drawing of the closed type fire extinguishing head 1 at the time of discharge | release. The configuration of the fourth embodiment is substantially the same as the configuration of the first embodiment unless otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Configuration of closed fire extinguishing head-screen 17)
The screen 17 is for allowing the fire extinguisher discharged from the discharge port 101 to pass through and foaming, and corresponds to the net body in the claims. The screen 17 is formed in a substantially dome shape, and is fixed to the fire extinguishing head main body 10 so as to surround the discharge port 101 and the deflector 16. Further, the screen 17 is provided with an insertion hole 170 through which the frame 102 is inserted, and the guard frame 12 disposed on the inner peripheral side of the frame 102 passes through the insertion hole 170 and the inside of the screen 17. It extends from the outside. In addition, the material which comprises the screen 17 is arbitrary, For example, a metal net | network may be used, or the metal thin plate which gave many fine holes by performing an etching process may be used.

(Operation of closed fire extinguishing head-normal operation)
Next, the operation of the closed fire extinguishing head 1 having the above-described configuration will be described. First, the normal time when no fire has occurred will be described.

  At normal times, as shown in FIG. 7A, the pip cap 11 is pressed against the discharge port 101 by the guard frame 12, and the guard frame 12 is supported by the balls 13. In this state, the force C applied to the pip cap 11 by the internal pressure of the extinguishing agent is transmitted from the pip cap 11 to the guard frame 12. The force transmitted to the guard frame 12 is transmitted to the ball 13. The force transmitted to the ball 13 is transmitted to the push ring 14 and the frame 102 that support the ball 13. Among these, the force transmitted to the push ring 14 is transmitted to the heat sensitive body 15 supporting the push ring 14 and further transmitted to the guard frame 12 supporting the heat sensitive body 15.

  Here, the force D transmitted from the heat sensitive body 15 to the guard frame 12 acts on the guard frame 12 in the first direction. The guard frame 12 is supported by a ball 13 on the inner peripheral side of the frame 102 and extends along the first direction. That is, since a force is applied from the thermal element 15 to the guard frame 12 along the direction in which the guard frame 12 extends, the applied force is not a bending moment with respect to the guard frame 12 but a tensile force. It is working.

  In addition, since the extending direction of the guard frame 12 and the major axis direction of the heat sensitive body 15 substantially coincide with each other, the guard frame 12 is arranged along the heat sensitive body 15 on the side of the heat sensitive body 15. The guard frame 12 functions to protect the heat sensitive body 15.

(Operation of closed fire extinguishing head-in case of fire)
Next, the operation of the closed fire extinguishing head 1 when a fire occurs will be described. As shown in FIG. 7B, when the heat sensitive body 15 is deformed by detecting heat due to the occurrence of a fire, the push ring 14, the ball 13, and the guard frame 12 are dropped from the frame 102 without being blocked by the screen 17. As a result, the pip cap 11 is detached from the discharge port 101 and is hooked by the stepped portion 104 of the frame 102.

  The fire extinguisher discharged from the discharge port 101 strikes the top 113 of the pip cap 11 and the deflector 16, thereby being uniformly distributed in a plane parallel to the deflector 16 and radiated toward the screen 17. The fire extinguisher foams when passing through the screen 17 and is radiated from the screen 17 toward the periphery of the closed fire extinguishing head 1.

(Effect of Embodiment 4)
As described above, according to the fourth embodiment, the force applied to the guard frame 12 from the heat sensitive body 15 acts on the guard frame 12 not as a bending moment but as a tensile force. Therefore, as compared with the case where a bending moment acts on the guard frame 12 having the same rigidity, the displacement of the guard frame 12 at the support point of the heat sensitive body 15 can be significantly reduced. Accordingly, the push ring 14 supported by the heat sensitive body 15, the ball 13 supported by the push ring 14, the guard frame 12 supported by the ball 13, and the pip cap 11 supported by the guard frame 12. The displacement with respect to the frame 102 can be reduced, the sealing between the spring seal 111 and the discharge port 101 can be easily maintained, and the leakage of the extinguishing agent can be suppressed. Further, the size of the guard frame 12 can be reduced, and the cost can be reduced.

  In addition, since the extending direction of the guard frame 12 and the major axis direction of the heat sensitive body 15 substantially coincide with each other, the guard frame 12 is arranged along the heat sensitive body 15 on the side of the heat sensitive body 15. The side of the heat sensitive body 15 can be protected by the guard frame 12. Thereby, the possibility that the heat sensitive body 15 may be accidentally damaged when the closed fire extinguishing head 1 is handled can be reduced. Further, since it is not necessary to provide a separate guard for the heat sensitive body 15, the cost can be reduced.

  As described above, even in the closed fire extinguishing head 1 including the screen 17, the bending of the guard frame 12 is suppressed to prevent the extinguishing agent from leaking, the heat sensitive body 15 is reliably protected, and the structure is downsized. Can do.

[III] Modifications to Each Embodiment While each embodiment according to the present invention has been described above, the specific configuration and means of the present invention are the same as the technical idea of each invention described in the claims. Modifications and improvements can be arbitrarily made within the range. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the mutual relationship of each embodiment)
Each embodiment described above can be combined with each other in an arbitrary combination. For example, any closed fire extinguishing head according to the first to third embodiments can be combined with the screen 17 according to the fourth embodiment to form a closed fire extinguishing head including the screen 17. When the closed fire extinguishing head 1 in the second embodiment and the screen 17 in the fourth embodiment are combined, the screen 17 is provided, and the guard frame 12 normally presses the ball 13 against the inner periphery of the frame 102. A closed fire extinguishing head can be constructed.

(About integration of the heat sensitive body 15 and the push ring 14)
In the first, third, and fourth embodiments, it has been described that the heat sensitive body 15 presses the push ring 14 and the push ring 14 presses the ball 13 against the inner periphery of the frame 102. The ring 14 may be integrated, and the heat sensitive body 15 may press the ball 13 directly.

  The closed fire-extinguishing head according to the present invention can be applied to a closed fire-extinguishing head that detects heat generated by a fire and releases a fire-extinguishing agent. In particular, the support that supports the heat-sensitive body affects the radiation distribution of the fire-extinguishing agent. Therefore, even if the support is loaded with a force from the heat sensitive body, the support is not easily deformed, and the heat sensitive body is reliably protected by the support, and is useful for a closed fire extinguishing head that can be reduced in cost by downsizing.

(Appendix)
The closed-type fire extinguishing head for an alarm device according to appendix 1 includes a fire extinguishing head body having a discharge port for discharging a fire extinguishing agent, a valve body that is detachably contacted with the discharge port, and a predetermined temperature A heat sensitive body that directly or indirectly supports the valve body in a deformed state, a support body that supports the heat sensitive body in a non-deformed state, and the fire-extinguishing head body A linkage body that is supported and supports the support body, and in a state where the heat sensitive body is not deformed, the linkage body cannot be detached from the fire extinguishing head body directly or indirectly by the heat sensitive body. The support body is supported by the linkage body, and the linkage body and the support body are detachable from the fire extinguishing head main body when the heat sensitive body is deformed. .

  The closed-type fire extinguishing head for an alarm device according to appendix 2 is the closed-type fire extinguishing head according to appendix 1, in which the support is configured to connect the linkage body to the fire-extinguishing head when the heat sensitive body is not deformed. It is characterized by being supported so as not to be detached from the main body.

  Further, the closed fire extinguishing head described in appendix 3 is supported by the heat sensitive body in a non-deformed state in the closed fire extinguishing head described in appendix 1, and presses the linkage body against the fire extinguishing head main body. And a pressing body that cannot be detached from the fire extinguishing head main body.

  Further, the closed fire extinguishing head according to appendix 4 is the closed fire extinguishing head according to any one of appendices 1 to 3, wherein the valve body is a seal that seals a gap between the valve body and the discharge port. And a member, and an elastic body that abuts against the valve body and a peripheral edge of the discharge port and exerts an elastic force in a state where the heat sensitive body is not deformed.

  Further, the closed fire extinguishing head according to appendix 5 is the closed fire extinguishing head according to appendix 4, wherein the valve body includes a substantially conical leaf spring in which the seal member and the elastic body are integrated. It is characterized by this.

  Further, the closed fire extinguishing head according to appendix 6 is the closed fire extinguishing head according to appendix 4, wherein the seal member is an O-ring disposed between the discharge port and the valve body, The body is a coil spring disposed between a peripheral edge of the discharge port and the valve body.

  Further, the closed fire-extinguishing head described in appendix 7 is the closed fire-extinguishing head according to any one of appendices 1 to 6, wherein the linkage body is a substantially spherical body.

  The closed fire extinguishing head according to appendix 8 is the closed fire extinguishing head according to any one of appendices 1 to 7, wherein the heat sensitive body is a glass bulb.

  Further, the closed fire extinguishing head according to appendix 9, the closed fire extinguishing head according to any one of appendices 1 to 8, comprising a net provided so as to surround the discharge port and the vicinity thereof, The support body is characterized by extending from the inside of the space surrounded by the net body to the outside through the net body.

  In the closed fire extinguishing head according to the supplementary note, in the state where the heat sensitive body is not deformed, the support body is supported by the linkage body, and therefore the heat sensitive body and the valve body can be supported by the support body. Can close the outlet. Further, when the heat sensitive body is deformed by detecting heat due to the occurrence of a fire, the linkage body is detached from the fire extinguishing head body, and accordingly, the support body that has lost support by the linkage body is also detached from the fire fighting head body. Thereby, since a support body does not exist in the radiation range of a fire extinguishing agent, it can avoid that the said support body influences the radiation distribution of a fire extinguishing agent, and can extinguish a fire extinguishing agent uniformly.

  In the closed fire-extinguishing head according to the supplementary note, in a state where the heat sensitive body is not deformed, the support body presses the linkage body toward the fire-extinguishing head body, and the linkage body is supported by the fire-extinguishing head body. Thereby, the linkage body can be fixed to the fire extinguishing head body, and the support body can be supported by the linkage body.

  In the closed fire extinguishing head according to the supplementary note, in a state where the heat sensitive body is not deformed, the heat sensitive body presses the pressing body against the linkage body, and the pressure body presses the linkage body against the fire extinguishing head main body. Therefore, the linkage body can be supported by the fire extinguishing head body. Thereby, the linkage body can be fixed to the fire extinguishing head body, and the support body can be supported by the linkage body.

  In the closed-type fire extinguishing head according to the supplementary note, the valve body includes a seal member and an elastic body. Therefore, when the heat sensitive body is not deformed, the seal member is pressed against the peripheral edge or inner periphery of the discharge port. The outlet can be sealed. Further, when the heat sensitive body is deformed and the valve body is not supported from the support body due to the support body falling off from the fire extinguishing head body, the valve body is smoothly detached from the discharge port by the elastic force of the elastic body. be able to.

  The closed fire extinguishing head according to the supplementary note uses a substantially conical leaf spring in which a sealing member and an elastic body are integrated, so that the structure can be simplified and the number of parts can be reduced, thereby reducing the cost. be able to.

  In the closed fire extinguishing head according to the supplementary note, since the valve body includes an O-ring and a coil spring, when the heat sensitive body is not deformed, the O-ring is brought into pressure contact with the inner peripheral surface of the discharge opening. Can be sealed. Further, if the O-ring is pressed against the inner peripheral surface of the discharge port, the discharge port is kept sealed even if the valve body moves along a direction perpendicular to the opening surface of the discharge port. It is possible to alleviate the installation accuracy requirement of the valve body in the head assembling work, and to reduce the manufacturing cost. Further, when the heat sensitive body is deformed and the support body is removed from the fire extinguishing head body and the valve body is no longer supported from the support body, the valve body is smoothly detached from the discharge port by the elastic force of the coil spring. be able to.

  Since the fire extinguishing head main body and the support body are linked by a link body that is a substantially spherical body, the closed fire extinguishing head according to the remarks easily rolls the link body when the heat sensitive body is deformed, so that the fire extinguishing head main body can be easily The support body and the pressing body can be smoothly detached from the fire extinguishing head main body.

  The closed fire extinguishing head according to the supplementary note uses a glass bulb as a heat sensitive body. Therefore, when the ambient temperature of the closed fire extinguishing head reaches a predetermined temperature due to the occurrence of a fire, the glass bulb bursts. As a result, the linkage body supported by the glass bulb can be reliably removed from the fire extinguishing head body in the event of a fire, and the support body and valve body can be removed from the closed fire extinguishing head, and the fire extinguishing agent can be removed from the outlet Can be released.

  The closed-type fire extinguishing head according to the supplementary note has the main structure of the support along the direction of the force applied from the heat sensitive body to the support, so the force applied from the heat sensitive body to the support is not supported. Acts as a pulling force on the body, not as a bending moment. Therefore, compared with the case where a bending moment acts on a support having equivalent rigidity, the displacement of the support at the support point of the heat sensitive body can be remarkably reduced. Accordingly, the pressing body supported by the heat sensitive body, the linking body supported by the pressing body, the supporting body supported by the linking body, and the displacement of the valve body supported by the supporting body with respect to the fire extinguishing head main body. Can be easily reduced, and the sealing between the valve body and the discharge port can be easily maintained and the leakage of the extinguishing agent can be suppressed. In addition, the structure of the support can be reduced in size, and the cost can be reduced. Furthermore, since the extending direction of the support and the major axis direction of the heat sensitive body are substantially coincident and the support is disposed along the heat sensitive body on the side of the heat sensitive body, the heat sensitive body is supported by the support. Can protect the sides. Thereby, it is possible to reduce the possibility that the heat sensitive body is accidentally damaged when the closed fire extinguishing head is handled. Further, since it is not necessary to provide a separate guard for the heat sensitive body, the cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Close type fire extinguishing head 10 Fire extinguishing head main body 11 Pip cap 12 Guard frame 13 Ball 14 Push ring 15 Heat sensitive body 16 Deflector 17 Screen 100 Connection part 101 Outlet 102 Frame 103 Radiation path 104 Step part 110 Pip cap main body 111 Spring seal 112 Hanging Stop portion 113 Top portion 114 Bottom portion 115 Ball support portion 116 Support hole 117 O-ring 118 Coil spring 120 Guard frame main body 120a Substantially cylindrical body 120b Substantially U-shaped body 121 Retaining hole 122 Impress screw 123 Stepped portion 140 Bottom portion 141 Contact portion 160 Fitting Hole 161 Retaining ring 170 Insertion hole

Claims (5)

A fire extinguishing head body having a discharge port for discharging a fire extinguishing agent;
A valve body that is press-contacted to the discharge port in a detachable manner;
A heat sensitive body that is deformed at a predetermined temperature and that directly or indirectly supports the valve body in an undeformed state;
A support that supports the heat sensitive body in a non-deformed state;
A linkage that is supported by the fire extinguishing head body and supports the support;
The support is disposed on the fire extinguishing head main body so that a part of the support protrudes outward from the fire extinguishing head main body,
The thermosensitive element is exposed to the outside from the support body without being blocked by the support body in any direction substantially orthogonal to the protruding direction of a part of the support body. Placing the body on the support,
In a state where the heat sensitive body is not deformed, the linkage body is supported by the heat sensitive body directly or indirectly so as not to be detached from the fire extinguishing head body, and the support body is supported by the linkage body, A support is supported so as not to be detached from the fire extinguishing head body by the linkage body,
In the state where the heat sensitive body is deformed, the linkage body and the support body are detachable from the fire extinguishing head main body ,
The fire extinguishing head main body includes a substantially cylindrical body having a major axis in a direction orthogonal to the opening surface of the discharge port, and a frame extending from a peripheral edge of the discharge port. Part is provided,
The valve body includes a hook-shaped latching portion provided on an outer periphery of the valve body. When the heat sensitive body is deformed and the valve body is detached from the discharge port, the latching portion is formed by the stepped portion. Is locked,
Comprising a substantially disc-shaped deflector fixed to the outer periphery of the frame ;
Closed fire extinguishing head characterized by. A part of the support is formed in a substantially U-shaped side surface,
In the internal space formed by a part of the support body that is substantially U-shaped, the heat sensitive body is disposed,
A part of the heat sensitive body is protruded outward from a part of the support along a direction substantially orthogonal to a plane substantially parallel to the substantially U-shaped side surface of the part of the support. about,
The closed fire extinguishing head according to claim 1. The closed fire extinguishing head according to claim 1, wherein the linkage body is a substantially spherical body . The closed-type fire extinguishing head according to any one of claims 1 to 3, wherein the heat sensitive body is a glass bulb . The valve body includes an O-ring disposed between the discharge port and the valve body in order to seal a gap between the valve body and the discharge port, and between the peripheral edge of the discharge port and the valve body. A coil spring that is arranged in contact with the valve body and the periphery of the discharge port to exert an elastic force in a state where the heat sensitive body is not deformed,
The closed fire extinguishing head according to any one of claims 1 to 4, wherein

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