JP2019175143A - Fire detection device - Google Patents

Abstract

To provide a fire detection device capable of maintaining the designability.SOLUTION: A fire detection device 1 includes: a heat sensing part 110 a part of which is accommodated inside an outer cover 20 and another part of which is provided so as to be exposed to the outside of the fire detection device 1 through an insertion hole 120 formed in a top surface part 22; and a guard part 130 having a plurality of ribs provided to cover the other part of the heat sensing part 110 and the periphery of the insertion hole 120 in the top surface part 22. A rib material of a first guard side rib 131 among the plurality of ribs is different from the material of the other part of the ribs, and the shape of the first guard side rib 131 of the plurality of ribs is different from the shape of the other part of the ribs.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fire detection device.

  Conventionally, a technique for protecting a temperature detection element has been proposed for a heat sensor that detects a fire in a monitoring area. In this technique, there are a temperature detection element, a sensor main body for housing the temperature detection element, and an insertion hole provided in the lower surface of the sensor main body, and only a part of the temperature detection element is included in the sensor main body. A protector having an insertion hole for exposing to the outside and a plurality of ribs provided on the lower surface of the sensor body and having the same shape, the protector covering the temperature detecting element exposed to the outside The heat sensor provided with is comprised. In addition, a display hole is provided on the lower surface of the sensor main body other than the part corresponding to the protector so that the indicator lamp accommodated in the sensor main body can be visually recognized from the outside (for example, Patent Documents). 1).

JP 2012-198757 A

  However, in the above prior art, since the protector and the display hole are provided on the lower surface of the sensor body so as to be exposed to the outside, both the protector and the display hole are easily noticeable from the outside. There was a risk of deteriorating the design of the vessel. In addition, since the shape of the plurality of ribs of the protector is the same, for example, depending on the installation status of the heat detector, it becomes difficult to make the inflow amount of the airflow flowing into the protector from each direction, It may be difficult to improve the inflow of airflow. Therefore, there was room for improvement from the viewpoint of designability or airflow.

  This invention is made | formed in view of the said problem, and it aims at providing the fire detection apparatus which can improve the designability or the inflow property of airflow.

  In order to solve the above-described problems and achieve the object, the fire detection device according to claim 1 is a fire detection device attached to an installation surface of an installation object, and a fire for detecting a fire in a monitoring area. A detection device, a housing and heat sensing means for detecting the fire, wherein a part of the heat sensing means is accommodated inside the housing, and of the side parts of the housing The other part of the heat sensing means is exposed to the outside of the fire detection device through an insertion hole formed on the side opposite to the side on the installation surface side. Heat sensing means provided, and guard means provided on the opposite side so as to cover the other part of the heat sensing means and the periphery of the insertion hole, the guard means having a plurality of ribs; , And the material of some of the plurality of ribs is the other part It is different from the blanking material, or the shape of the part of the rib of the plurality of ribs is made different from other part of the rib shape.

  The fire detection device according to claim 2 is the fire detection device according to claim 1, wherein the fire detection device is a display means provided inside the housing, and is provided outside the fire detection device through the insertion hole. Display means for displaying predetermined information by irradiating light toward the light, and forming only a part of the ribs with a translucent material, and the light emitted from the display means is formed with the translucent material. The plurality of ribs are configured to be guided to the outside of the fire detection device through the formed ribs.

  The fire detection device according to claim 3 is the fire detection device according to claim 1 or 2, wherein the thickness of the plurality of ribs is set based on an inflow amount or an inflow direction of an airflow flowing into the guard means. did.

  The fire detection device according to claim 4 is the fire detection device according to any one of claims 1 to 3, wherein the rib formed of the translucent material is the thickest among the plurality of ribs. The rib is thicker than the thin rib.

  The fire detection device according to claim 5 is the fire detection device according to any one of claims 1 to 4, wherein the insertion hole is provided in a portion other than the central portion of the opposite side portion. It was.

  The fire detection device according to claim 6 is the fire detection device according to claim 5, wherein the rib on the central portion side of the opposite side portion among the plurality of ribs has the largest thickness among the plurality of ribs. The rib is thinner than a certain rib, or the rib is narrower than the widest rib.

  According to the fire detection device of claim 1, the material of some of the plurality of ribs is made different from the material of some of the other ribs. For example, only some of the ribs are made of a translucent material. In this way, it is possible to guide the light illuminated from the display means accommodated in the housing through the partial rib and the insertion hole to the outside of the fire detection device. Therefore, since there is no need to provide a display hole for guiding the light to be examined from the display means to the outside, the conventional technique (technique in which the protector and the display hole are exposed to the outside) is required. Thus, the design of the fire detection device can be maintained. Also, because the shape of some ribs among the plurality of ribs is different from the shape of some other ribs, compared to the case where the plurality of ribs are the same shape, depending on the installation status of the fire detection device, It becomes easy to equalize the inflow amount of the airflow flowing into the guard means from each direction. Therefore, the inflow property of the airflow of the fire detection device can be improved.

  According to the fire detection device of claim 2, only a part of the ribs is formed of a translucent material, and the light irradiated from the display means is transmitted through the ribs formed of the translucent material. Since a plurality of ribs are configured to be guided to the outside of the fire detection device, a part of the ribs of the guard means can function as a light guide while ensuring the strength of the guard means. It is possible to make visible light easily visible in various directions.

  According to the fire detection device of claim 3, since the thickness of the plurality of ribs is set based on the inflow amount or the inflow direction of the airflow flowing into the guard means, the inflow amount of the airflow flowing into the guard means or The thickness of the plurality of ribs according to the inflow direction can be set, and the inflow property of the airflow to the guard means can be ensured while maintaining the durability of the guard means.

  According to the fire detection device of claim 4, since the rib formed of the translucent material is a rib that is thicker than the thinnest rib among the plurality of ribs, This makes it easier to guide the light emitted from the display means to the outside of the fire detection device, while preventing damage to the ribs formed from the ribs, improving the durability of the ribs made of translucent material It is possible to further maintain the display function of the fire detection device.

  According to the fire detection device of the fifth aspect, since the insertion hole is provided in a portion other than the central portion among the portions on the opposite side portion, the insertion hole is formed in the central portion on the opposite side portion. In comparison, since it is less likely to be restricted in the attachment of the heat sensing means and the display means, the attachment of the heat sensing means and the display means can be maintained.

  According to the fire detection device of claim 6, the rib on the central side of the opposite side portion among the plurality of ribs is a rib having a thickness smaller than the thickest rib among the plurality of ribs, or Since the width of the rib is narrower than that of the widest rib, when the insertion hole is provided in a portion other than the central portion of the portion on the opposite side, the amount of airflow flowing in from each direction in the guard means Since uniformization becomes easier, the inflow property of the airflow to the guard means can be improved.

It is a side view which shows the attachment condition of the fire detection apparatus which concerns on embodiment. It is an enlarged view of the area | region of the fire detection apparatus of FIG. It is a bottom view which shows the fire detection apparatus of the state which removed the attachment base. It is AA arrow sectional drawing of FIG.

  Hereinafter, embodiments of a fire detection device according to the present invention will be described in detail with reference to the drawings. First, [I] the basic concept of the embodiment will be described, then [II] the specific content of the embodiment will be described, and finally, [III] a modification to the embodiment will be described. However, the present invention is not limited to the embodiments.

[I] Basic Concept of Embodiment First, the basic concept of the embodiment will be described. The embodiment is generally a fire detection device attached to an installation surface of an installation target, and relates to a fire detection device for detecting a fire in a monitoring area.

  Here, in the embodiment, the “fire detection device” is a device that thermally detects a fire in the monitoring area and notifies it, for example, a thermal fire detector, a fire alarm, or a heat It is a concept that includes a scientific and optical fire detector, a fire alarm, and the like. The “installation target” is a target on which the fire detection device is installed, and includes, for example, a concept including a ceiling part and a wall part of a building. The “building” may have any specific structure or type, but includes concepts such as detached houses, apartment houses such as apartments and condominiums, office buildings, event facilities, commercial facilities, and public facilities. It is. Further, the “monitoring area” is an area to be monitored and is a concept including, for example, an area inside the building, an area outside the building, and the like. “Notifying” is a concept including, for example, outputting predetermined information to an external device, displaying or outputting predetermined information via an output unit (display unit or audio output unit), and the like. is there. Hereinafter, in the embodiment, the “fire detection device” is “thermal and optical fire detector”, the “installation target” is “the ceiling of the office building”, and the “monitoring area” is A case where the area is “inside the office building” will be described.

[II] Specific Contents of Embodiment Next, specific contents of the embodiment will be described.

(Constitution)
First, the structure of the fire detection apparatus according to the embodiment will be described. FIG. 1 is a side view showing a mounting state of the fire detection device according to the embodiment. FIG. 2 is an enlarged view of the area of the fire detection device of FIG. FIG. 3 is a bottom view showing the fire detection device in a state where a mounting base described later is removed. 4 is a cross-sectional view taken along line AA in FIG. In the following description, the X direction in FIG. 1 is the left-right direction of the fire detection device (+ X direction is the left direction of the fire detection device, −X direction is the right direction of the fire detection device), and the Y direction in FIG. The front-rear direction (the + Y direction is the forward direction of the fire detection device, the −Y direction is the backward direction of the fire detection device), the Z direction in FIG. 1 is the vertical direction of the fire detection device (the + Z direction is the upward direction of the fire detection device, −Z The direction is referred to as the downward direction of the fire detection device. Further, the direction away from the detection space with reference to the center position of the detection space in FIG. 3 is referred to as “outside”, and the direction approaching the detection space is referred to as “inside”.

  The fire detection device 1 is a device that detects the heat of the monitoring area and detects and detects a substance to be detected (for example, smoke) contained in the gas. The fire detection device 1 is installed on an installation surface 2 on the lower surface of the ceiling (installation target) of the building inside the building. As shown in FIGS. 1 to 4, the mounting base 10 and the outer cover 20 are installed. The inner cover 30, the inflow space 40, the insect screen 50, the detection space 60, the detection unit cover 70, the detection unit main body 80, the terminal board 90, and the substrate 100.

(Configuration-Mounting base)
Returning to FIG. 1, the attachment base 10 is attachment means for attaching the outer cover 20 to the installation surface 2. This mounting base 10 is configured using, for example, a known mounting base for a fire detection device (as an example, a substantially plate-shaped mounting base made of resin), and as shown in FIGS. It is fixed to the installation surface 2 with a fixture or the like.

(Configuration-outer cover)
Returning to FIG. 2, the outer cover 20 is a cover that covers the inner cover 30, the inflow space 40, the insect screen 50, the detection space 60, the detection unit cover 70, the detection unit main body 80, the terminal board 90, and the substrate 100. The outer cover 20 is formed of, for example, a resin material having a light shielding property. As shown in FIGS. 2 to 4, the outer cover main body 21, the top surface portion 22, the first rib portion 23, and the second rib portion. 24.

  Among these, the outer cover main body 21 is a basic structure of the outer cover 20. The outer cover main body 21 is formed of, for example, a substantially hollow cylindrical body whose upper and lower surfaces are open, and the upper end portion of the outer cover main body 21 abuts on the lower surface of the mounting base 10 as shown in FIG. And are fixed to the mounting base 10 by a fitting structure (or a fixture) or the like.

  Further, the top surface portion 22 is a partitioning means for partitioning the inflow space 40. The top surface portion 22 is formed of, for example, a substantially circular plate-like body, and is provided substantially horizontally below the outer cover main body 21 as shown in FIGS.

  The first rib portion 23 is a partitioning means for partitioning the inflow space 40. The first rib portion 23 is formed of a substantially plate-like body, and is provided vertically between the outer cover main body 21 and the top surface portion 22. Specifically, as shown in FIGS. 2 and 4. The outer cover 20 is radially provided from the center and connected to the outer cover body 21 and the top surface portion 22.

  The second rib portion 24 is a partitioning means for partitioning the inflow space 40. The second rib portion 24 is formed of a substantially plate-like body, and is provided vertically between the outer cover main body 21 and the top surface portion 22. Specifically, as shown in FIGS. 2 and 4. Are provided between the inner end portions of the adjacent first rib portions 23 and connected to the outer cover main body 21 and the top surface portion 22. Details of the configuration of the outer cover 20 will be described later. The “outer cover 20” described above corresponds to the “housing” in the claims.

(Configuration-Inflow space)
Returning to FIG. 2, the inflow space 40 is a space for allowing gas outside the fire detection device 1 to flow into the fire detection device 1. A plurality of the inflow spaces 40 are formed inside the outer cover 20. Specifically, as shown in FIGS. 2 and 4, the top surface portion 22 and the first rib portion 23 in the inner space of the outer cover 20. A space surrounded by the second rib portion 24 and the inner cover 30 is formed as an inflow space 40.

(Configuration-inner cover)
The inner cover 30 is a cover that covers the detection space 60, the detection unit cover 70, the detection unit main body 80, and the substrate 100, and is a partition unit that partitions the inflow space 40. The inner cover 30 is, for example, a substantially hollow cylindrical body whose upper surface is open, and is formed of a light-shielding resin material. As shown in FIG. The lower surface of 30 is provided so as to face the top surface portion 22 of the outer cover 20 through the inflow space 40. As shown in FIG. 4, a first opening 30 a is formed on the lower surface of the inner cover 30. The first opening 30a is an opening for sending the gas flowing into the inflow space 40 to the detection space 60, and as shown in FIG. Is provided.

(Configuration-detection space)
The detection space 60 is a space for detecting a substance to be detected. As shown in FIG. 4, the space surrounded by the detection unit cover 70 and the detection unit main body 80 among the internal space of the inner cover 30 is a detection space. 60.

(Configuration-detector cover)
The detection unit cover 70 is partitioning means for partitioning the detection space 60 and is incident suppression means for suppressing disturbance light from entering the detection space 60. The detection unit cover 70 is a substantially hollow cylindrical body having an open upper surface, and is formed of a resin material having a light shielding property. In addition, as shown in FIG. 4, the detection unit cover 70 has a lower surface of the detection unit cover 70 that is connected to the top surface 22 of the outer cover 20 via the first opening 30 a and the inflow space 40. It arrange | positions so that it may oppose and is fixed with the fitting structure etc. with respect to the detection part main body 80. FIG. As shown in FIG. 4, a second opening 70 a is formed on the lower surface of the detection unit cover 70. The second opening 70a is an opening for allowing the gas sent from the first opening 30a to flow into the detection space 60. As shown in FIG. 4, the first opening on the lower surface of the detection unit cover 70 is provided. It is provided at a portion corresponding to 30a.

(Configuration-insect net)
The insect net 50 is a net for preventing insects outside the fire detection device 1 from entering the detection space 60. The insect net 50 is configured using a mesh-like and circular net, and is attached to the detection unit cover 70 as shown in FIG.

(Configuration-detector body)
The detection unit main body 80 is an attachment unit for attaching the detection unit cover 70, and is an incidence suppression unit for suppressing disturbance light from entering the detection space 60. The detection unit main body 80 is formed of, for example, a light-blocking resin material, and is disposed so as to cover the upper surface of the detection unit cover 70 as shown in FIG. It is fixed by etc. Further, the detection unit main body 80 is provided with a support portion (not shown) for supporting each of a first light emitting portion described later, a second light emitting portion described later, and a light receiving portion described later. Further, the detection unit main body 80 has an optical path hole (not shown) for forming an optical path between each of a first light emitting unit to be described later, a second light emitting unit to be described later, and a light receiving unit to be described later and the detection space 60. ) Are formed.

(Configuration-terminal board)
The terminal board 90 is an accommodating means for accommodating the inner cover 30, the detection unit cover 70, the detection unit main body 80, and the substrate 100. The terminal board 90 has a substantially hollow cylindrical shape with an open lower surface, and is formed of, for example, a resin material having a light shielding property. As shown in FIG. 4, the terminal board 90 is provided so as to cover the inner cover 30, the detection unit cover 70, the detection unit main body 80, and the substrate 100 from above, and is fitted to the outer cover 20. And fixed by a fixture or the like through a first mounting hole (not shown) formed in the mounting member 91 with respect to the mounting base 10.

(Configuration-board)
The substrate 100 is a mounting means on which various electric circuits (not shown) are mounted. The board 100 is configured using, for example, a known flat circuit board or the like. As shown in FIG. 4, the board 100 is spaced apart from the upper and lower ends of the terminal board 90 within the terminal board 90. It is arranged substantially horizontally and is fixed to the terminal board 90 by a fixture through an attachment hole (not shown) formed in the terminal board 90 and a second attachment hole (not shown) formed in the attachment member 91. Yes.

  Further, in addition to mounting known electronic components used in the conventional fire detection device 1 on the substrate 100, as shown in FIG. 4, a first light emitting unit (not shown), a second light emitting unit (Not shown), light receiving part (not shown), heat sensing part 110, display part (not shown), communication part (not shown), power supply part (not shown), control part (not shown), and storage part (not shown) (Omitted) is implemented.

(Configuration-Substrate-First light emitting unit, second light emitting unit, light receiving unit)
Among these, the 1st light emission part is the 1st light emission means which irradiates detection light (henceforth "the 1st detection light") to detection space 60, for example, a publicly known light emitting element (an infrared LED etc. as an example). It is comprised using. The second light emitting unit is second light emitting means for irradiating the detection space 60 with detection light having a wavelength different from that of the first detection light (hereinafter referred to as “second detection light”). (For example, a blue LED or the like) is used. The light receiving unit receives scattered light from the smoke of the first detection light emitted from the first light emitting unit, outputs a first received light signal corresponding to the received scattered light, and irradiates from the second light emitting unit. Light receiving means for receiving the scattered light of the second detected light with respect to the smoke and outputting a second light receiving signal corresponding to the received scattered light, for example, using a known light receiving element (eg, a photodiode). It is configured. Moreover, although the installation method of the first light emitting unit, the second light emitting unit, and the light receiving unit is arbitrary, in the embodiment, the first detection light or the second light emitted from the first light emitting unit or the second light emitting unit is used. It is installed so that the detection light can be prevented from being directly received by the light receiving section through various optical path holes of the detection section main body 80. For example, the angle between the optical axis of the first light emitting unit (hereinafter referred to as “first light emitting side optical axis”) and the optical axis of the light receiving unit (hereinafter referred to as “light receiving side optical axis”) is about 135 °. A 1st light emission part and a light-receiving part are installed in a position. The second light emitting unit and the light receiving unit are installed at a position where the angle between the optical axis of the second light emitting unit (hereinafter referred to as “second light emitting side optical axis”) and the light receiving side optical axis is about 90 °. ing.

(Configuration-board-heat sensing unit, display unit, communication unit, power supply unit)
Returning to FIG. 2, the heat sensing unit 110 is heat sensing means for detecting a fire. The heat sensing unit 110 is configured using, for example, a known heat sensing element (for example, a thermistor). As shown in FIGS. 2 to 4, the inner cover 30, the detection unit cover 70, and the detection unit It arrange | positions so that a part of heat detection part 110 may be exposed to the exterior of the fire detection apparatus 1 through the insertion hole (illustration omitted) provided in each of the main body 80, and the insertion hole 120 of the outer cover 20 mentioned later. . The display unit displays predetermined information (for example, information indicating whether or not a fire is detected) by irradiating light (hereinafter referred to as “display light”) toward the outside of the fire detection device 1. It is a display means, for example, is comprised using well-known display means (LED etc.). The light projecting method of the display unit is arbitrary. For example, an insertion hole (not shown) provided in each of the inner cover 30, the detection unit cover 70, and the detection unit main body 80, and an outer cover 20 described later. For example, light is emitted by guiding display light from the display unit to the outside of the fire detection device 1 through the light guide 104a inserted through the insertion hole 120. The communication unit is a communication unit that communicates with an external device (for example, a receiver). The power supply unit is a power supply unit that supplies electric power supplied from a commercial power supply or a battery (not shown) to each unit of the fire detection device 1.

(Configuration-board-control unit, storage unit)
The control unit is a control unit that controls the fire detection device 1. Specifically, the control unit includes a CPU, various programs that are interpreted and executed on the CPU (including a basic control program such as an OS and an application program that is activated on the OS to realize a specific function), a program, The computer includes an internal memory such as a RAM for storing various data. The storage unit is a storage unit that stores a program and various data necessary for the operation of the fire detection device 1. The storage unit is configured using a rewritable recording medium, and for example, a nonvolatile recording medium such as a flash memory can be used.

(Configuration-details of configuration of outer cover)
Returning to FIG. 2, the details of the configuration of the outer cover 20 will be described next. However, the outer cover 20 can be manufactured in any shape, method, and material unless otherwise specified.

  In the embodiment, as shown in FIGS. 2 to 4, the top surface portion 22 that is the side portion (opposite side portion) opposite to the side portion on the installation surface 2 side of the side portion of the outer cover 20 is provided on the top surface portion 22. The insertion hole 120 and the guard part 130 are provided.

(Configuration-details of configuration of outer cover-insertion hole)
Returning to FIG. 3, the insertion hole 120 is a through hole for exposing a part of the heat sensing unit 110 to the outside of the fire detection device 1 and irradiating the display light from the display unit to the outside of the fire detection device 1. is there.

  Here, the specific shape and size of the insertion hole 120 are arbitrary, but in the embodiment, the planar shape of the insertion hole 120 is set to a substantially elliptical shape as shown in FIG. (Alternatively, it may be a polygonal shape such as a square shape). In addition, the diameter of the insertion hole 120 is set to a size that allows only a part of the heat sensing unit 110 to be exposed to the outside and allows the display light to be emitted to the outside of the fire detection device 1. For example, the length is set longer than the sum of the diameter of the heat sensing unit 110 and the diameter of the light guide 104a.

  Moreover, although the formation method of the insertion hole 120 is arbitrary, it forms in parts other than the center part of the top surface part 22, and specifically, it forms in the right side part in the top surface part 22, as shown in FIG. is doing. In this case, for example, the heat sensing unit 110 and the display unit may be installed in a part corresponding to the insertion hole 120 in the part of the substrate 100 or in the vicinity thereof. Compared with the case where the insertion hole 120 is formed at the center of the top surface portion 22 by such a forming method, the heat sensing portion 110 and the display portion are less susceptible to restrictions on the mounting of the heat sensing portion 110 and the display portion. Can be maintained.

  With such an insertion hole 120, a part of the heat sensing unit 110 is accommodated in the outer cover 20, and another part of the heat sensing unit 110 is exposed to the outside of the fire detection device 1 through the insertion hole 120. In addition, the display light from the display unit can be emitted to the outside of the fire detection device 1 through the insertion hole 120.

(Configuration-details of outer cover configuration-guard part)
Returning to FIG. 2, the guard part 130 is a guard means for protecting the heat sensing means. As shown in FIGS. 2 to 4, the first guard side rib 131, the second guard side rib 132, and the third guard are provided. A side rib 133, a fourth guard side rib 134, and a guard side connecting portion 135 are provided.

(Configuration-details of configuration of outer cover-guard part-first guard side rib to fourth guard side rib)
Returning to FIG. 2, the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 are basic structures of the guard part 130. The first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 are formed of a long plate-like body. As shown, a portion of the heat sensing unit 110 exposed to the outside of the fire detection device 1 and the periphery of the insertion hole 120 are provided. Specifically, each of the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 is provided so that the longitudinal direction thereof is substantially along the vertical direction. (It is provided with a slight inclination in FIG. 3) and is erected with respect to the lower surface of the top surface portion 22.

(Configuration-Details of the configuration of the outer cover-Guard part-Guard side connecting part)
Returning to FIG. 2, the guard side connecting portion 135 is a connecting means for connecting the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134. For example, the guard-side connecting portion 135 is formed of the same material as that of the outer cover 20, and as shown in FIGS. 2 to 4, the first guard-side rib 131, the second guard-side rib 132, and the third The guard-side rib 133 and the fourth guard-side rib 134 are connected to the vicinity of the upper end portion.

  With such a configuration, it is possible to suppress the insertion hole 120 from being exposed to the outside of the fire detection device 1 by the guard portion 130, and to improve the design of the fire detection device 1 without impairing the inflow of airflow to the guard portion 130. Can be maintained.

(Configuration-Details of configuration of outer cover-Guard section-Details of configuration of first guard side rib to fourth guard side rib)
Next, the detail of the structure of the 1st guard side rib 131, the 2nd guard side rib 132, the 3rd guard side rib 133, and the 4th guard side rib 134 is demonstrated.

  First, the material of the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134 is arbitrary, but in the embodiment, the first guard side rib 131 is used. Of the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134, the material of some of the ribs is different from the material of some of the other ribs. Specifically, the first guard-side rib 131 is formed of a translucent material (for example, a translucent resin material, a glass material, etc.), and the second guard-side rib 132, the third guard-side rib 133, and The fourth guard side rib 134 is formed of the same material as the outer cover 20.

  With such a configuration, only the first guard-side rib 131 is formed of a translucent material, so that the display unit housed in the outer cover 20 via the first guard-side rib 131 and the insertion hole 120 can be used. The checked display light can be guided to the outside of the fire detection device 1. Therefore, since there is no need to provide a display hole for guiding display light to the outside in the outer cover 20, the fire detection device as compared with the conventional technique (a technique in which the protector and the display hole are exposed to the outside). 1 designability can be maintained.

  Further, the specific configuration of the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134 is arbitrary, but in the embodiment, from the display unit. The irradiated display light is configured to be guided to the outside of the fire detection device 1 through the first guard side rib 131. More specifically, the display light can be visually recognized when a person looks up at the fire detection device 1 under a predetermined condition. Here, although “predetermined conditions” are arbitrary, in the embodiment, as shown in FIG. 1, the fire detection device 1 has a height H1 of the installation surface 2 (for example, 2.4 m). It is installed on the ceiling, the person HM is within a predetermined distance D (for example, within 3.0 m) from the fire detection device 1, and the eye height H2 of the person HM is the installation surface 2 This is lower than the height H1 (for example, 1.8 m).

  Specifically, first, the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134 are provided adjacent to the insertion hole 120. More specifically, as shown in FIG. 3, the first guard-side rib 131 is disposed on the right side of the insertion hole 120, and the second guard-side rib 132 is disposed on the left side of the insertion hole 120. The third guard side rib 133 is disposed forward and to the right of the insertion hole 120, and the fourth guard side rib 134 is disposed rearward and to the right of the insertion hole 120.

  With such a configuration, it is possible to visually recognize display light when a person looks up at the fire detection device 1 under the predetermined condition. In particular, the first guard-side rib 131 can function as a light guide while ensuring the strength of the guard portion 130, and the display light can be easily viewed in various directions.

  The shape of the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134 (specifically, the shape of the rib and the size of the rib) is arbitrary. However, in the embodiment, some of the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 have a different shape. It is set to be different from the shape of the rib of the part. Specifically, the vertical lengths of the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 are as shown in FIGS. Further, the length of the portion of the heat sensing unit 110 exposed to the outside of the fire detection device 1 is set longer than the vertical length. In addition, the width of the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side rib 134 flows from each direction toward the guard portion 130 in the embodiment. It is set based on experimental results and the like so that the airflow can be made uniform. As an example, as shown in FIGS. 2 and 4, the diameter of the insertion hole 120 may be set shorter, and the width of the second guard side rib 132 may be set narrower than other ribs. Further, regarding the thicknesses of the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134, in the embodiment, inflow of airflow that flows into the guard portion 130 Set based on quantity or inflow direction. For example, you may set based on an experimental result etc. so that the airflow which flows in toward the guard part 130 from each direction can be equalize | homogenized. As an example, the thickness of the second guard-side rib 132 may be set thinner than other ribs. In addition, the thickness of the third guard side rib 133 and the fourth guard side rib 134 may be set larger than the thickness of the second guard side rib 132. Moreover, you may set the thickness of the 1st guard side rib 131 thicker than another rib.

  Such a configuration makes it easier to equalize the inflow amount of the airflow flowing from each direction into the guard unit 130 in accordance with the installation state of the fire detection device 1 than in the case where the plurality of ribs have the same shape. . Therefore, the inflow property of the airflow of the fire detection device 1 can be improved. In addition, the thickness of a plurality of ribs can be set according to the inflow amount or inflow direction of the airflow flowing into the guard portion 130, and the airflow into the guard portion 130 is ensured while maintaining the durability of the guard portion 130. can do. In addition, since the first guard-side rib 131 is a rib that is thicker than the thinnest rib among the plurality of ribs (specifically, because it is the thickest rib), the first guard-side rib 131. Since it becomes easy to guide the display light emitted from the display unit to the outside of the fire detection device 1 while suppressing breakage of the fire, etc., the display of the fire detection device 1 is improved while improving the durability of the first guard side rib 131. The function can be further maintained. In particular, since the first guard-side rib 131 is disposed at the position farthest from the central portion of the top surface portion 22, the guard portion 130 is set by setting the thickness of the first guard-side rib 131 as described above. Can contribute to improving the uniformity of the inflow amount of the airflow flowing in from each direction, the design of the fire detection device 1, and the durability of the guard part 130. Further, the second guard-side rib 132 is a rib that is thinner than the thickest rib among the plurality of ribs (specifically, the rib that is the thinnest), and more than the widest rib. Since the rib is narrow (specifically, the narrowest rib), when the insertion hole 120 is provided in a portion other than the central portion of the top surface portion 22, the guard portion 130 can Since it becomes easier to equalize the inflow amount of the inflowing airflow, the inflowability of the airflow into the guard portion 130 can be improved.

  In addition, although the formation method of the guard part 130 as described above is arbitrary, in the embodiment, the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, and the fourth guard side. The rib 134 and the guard side connecting portion 135 are formed separately. Specifically, the first guard side rib 131 is formed by injection molding a translucent resin material, and the outer cover 20, the second guard side rib 132, by injection molding a light shielding resin material, The 3rd guard side rib 133, the 4th guard side rib 134, and the guard side connection part 135 are formed integrally. Thereafter, the first guard-side rib 131 is formed by being connected to the outer cover 20 and the guard-side connecting portion 135 by a fitting structure or the like.

(About the action of the fire detection device)
Next, the operation of the fire detection device 1 configured as described above will be described.

  That is, for example, in a state where the fire detection device 1 is attached to the installation surface 2, the insertion hole 120 is covered with the guard portion 130, so that the insertion hole 120 can be prevented from being exposed to the outside of the fire detection device 1.

  Further, for example, when display light is emitted from the display unit in a state where the fire detection device 1 is attached to the installation surface 2, the display light emitted from the display unit is detected through the first guard-side rib 131. Since it is guided to the outside of the device 1, the first guard-side rib 131 can function as the light guide 104a.

(Effect of embodiment)
Thus, according to the embodiment, the material of the first guard-side rib 131 out of the first guard-side rib 131 to the fourth guard-side rib 134 is different from the material of the other part of the ribs. By forming only the first guard-side rib 131 with a light-transmitting material, the light irradiated from the display unit accommodated in the outer cover 20 through the first guard-side rib 131 and the insertion hole 120 is fired. It is possible to guide the detection apparatus 1 to the outside. Therefore, it is not necessary to provide the outer cover 20 with a display hole for guiding the light to be examined from the display unit to the outside, and therefore, compared with the conventional technique (a technique in which the protector and the display hole are exposed to the outside). Thus, the design of the fire detection device 1 can be maintained. Further, since the shape of the first guard side rib 131 of the first guard side rib 131 to the fourth guard side rib 134 is different from the shape of some of the other ribs, the first guard side rib 131 is changed to the fourth guard side. Compared to the case where the ribs 134 have the same shape, it becomes easier to equalize the inflow amount of the airflow flowing into the guard unit 130 from each direction depending on the installation state of the fire detection device 1. Therefore, the inflow property of the airflow of the fire detection device 1 can be improved.

  Further, only the first guard-side rib 131 is formed of a translucent material, and the first irradiation is performed so that the light emitted from the display unit is guided to the outside of the fire detection device 1 through the first guard-side rib 131. Since the fourth guard-side rib 134 is configured from the guard-side rib 131, the first guard-side rib 131 can function as the light guide 104a while ensuring the strength of the guard 130, and light emitted from the display unit Can be easily viewed in various directions.

  Moreover, since the thickness of the 4th guard side rib 134 from the 1st guard side rib 131 was set based on the inflow amount or inflow direction of the airflow which flows into the guard part 130, the inflow amount of the airflow which flows into the guard part 130 is set. Alternatively, the thickness of the first guard-side rib 131 to the fourth guard-side rib 134 can be set according to the inflow direction, and the airflow into the guard portion 130 is ensured while maintaining the durability of the guard portion 130. Can do.

  Further, since the first guard side rib 131 is thicker than the thinnest rib among the first guard side rib 131 to the fourth guard side rib 134, the first guard side rib 131 can be damaged. While suppressing, it becomes easy to guide the light emitted from the display unit to the outside of the fire detection device 1, so that the display function of the fire detection device 1 is further maintained while improving the durability of the first guard-side rib 131. It becomes possible.

  In addition, since the insertion hole 120 is provided in a portion other than the central portion of the top surface portion 22, compared to the case where the insertion hole 120 is formed in the central portion of the top surface portion 22, the heat sensing unit 110 and the display unit are arranged. Since it is difficult to receive restrictions on attachment, the attachment of the heat sensing unit 110 and the display unit can be maintained.

  Further, the second guard side rib 132 is a rib that is thinner than the thickest rib among the first guard side rib 131 to the fourth guard side rib 134, and is narrower than the widest rib. Since it is a rib, when the insertion hole 120 is provided in a portion other than the central portion of the top surface portion 22, it becomes easier to equalize the inflow amount of airflow flowing from each direction in the guard portion 130. The inflow property of the airflow to can be improved.

[III] Modifications to Embodiments Although the embodiments according to the present invention have been described above, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. Can be arbitrarily modified and improved. 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 contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved.

(About fire detection equipment)
In the said embodiment, although it demonstrated that the fire detection apparatus 1 was equipped with the inner cover 30, you may abbreviate | omit not only this but the inner cover 30, for example.

(About insertion hole)
In the above embodiment, the insertion hole 120 has been described as being formed in a portion other than the central portion of the top surface portion 22. However, the present invention is not limited to this, and for example, the insertion hole 120 is formed in the central portion of the top surface portion 22. Also good.

(About the guard part)
In the above embodiment, the number of installed ribs of the guard part 130 is four, but the present invention is not limited to this. For example, there may be only two, only three, or five or more.

  In the above embodiment, the material of some of the plurality of ribs is different from the material of some of the other ribs, and the shape of some of the plurality of ribs is the other part of the ribs. Although it explained that it was different from the shape of a rib, it is not restricted to this. For example, the material of some of the plurality of ribs may be different from the material of some of the other ribs, and the shapes of the plurality of ribs may be the same. Alternatively, the material of the plurality of ribs may be the same, and the shape of some of the plurality of ribs may be different from the shape of some of the other ribs.

  Moreover, although the said embodiment demonstrated that only the 1st guard side rib 131 was formed with the translucent material, it is not restricted to this. For example, you may form ribs other than the 1st guard side rib 131 with a translucent material. As an example, at least one of the second guard side rib 132, the third guard side rib 133, or the fourth guard side rib 134 may be formed of a translucent material. Alternatively, only two or only three of the first guard side rib 131, the second guard side rib 132, the third guard side rib 133, or the fourth guard side rib 134 are formed of a translucent material. May be.

  In the above embodiment, the thickness of the first guard-side rib 131, the second guard-side rib 132, the third guard-side rib 133, and the fourth guard-side rib 134 is set to the inflow of airflow that flows into the guard portion 130. Although it has been described that the setting is based on the amount or the inflow direction, the present invention is not limited to this. May be.

  In the said embodiment, although the 1st guard side rib 131 demonstrated that it was the thickest rib, it is not restricted to this, For example, a rib thinner than the thickest rib may be sufficient.

  Moreover, although the said embodiment demonstrated that the 2nd guard side rib 132 was the rib with the thinnest thickness and the narrowest width, it is not restricted to this. For example, the rib may be the thinnest rib or the narrowest rib. Alternatively, the rib may be thicker than the thinnest rib and may be wider than the narrowest rib.

(Appendix)
The fire detection device according to appendix 1 is a fire detection device that is attached to the installation surface of an installation object, and is a fire detection device for detecting a fire in a monitoring area. A heat sensing means, wherein a part of the heat sensing means is housed inside the housing, and the side of the housing is a side opposite to the side on the installation surface side. Heat sensing means provided such that another part of the heat sensing means is exposed to the outside of the fire detection device through an insertion hole formed on the side side part, and the heat sensing on the opposite side part. Guard means provided so as to cover the other part of the means and the periphery of the insertion hole, the guard means having a plurality of ribs, and the material of some of the plurality of ribs is made of Different from the material of some other ribs, or some of the plurality of ribs The blanking shape was different from the other part of the rib shape.

  Further, the fire detection device of appendix 2 is the display means provided in the housing of the fire detection device of appendix 1, and is directed to the outside of the fire detection device through the insertion hole. Display means for displaying predetermined information by irradiating light, only the part of the ribs is formed of a translucent material, and the light irradiated from the display means is formed of the translucent material. The plurality of ribs are configured to be guided to the outside of the fire detection device via the ribs.

  Further, the fire detection device according to attachment 3 is the fire detection device according to attachment 1 or 2, wherein the thickness of the plurality of ribs is set based on an inflow amount or an inflow direction of an airflow flowing into the guard means.

  Further, the fire detection device according to appendix 4 is the fire detection device according to any one of appendices 1 to 3, wherein the rib formed of the light-transmitting material has the thinnest thickness among the plurality of ribs. The rib is thicker than the rib.

  Further, the fire detection device of appendix 5 is the fire detection device according to any one of appendices 1 to 4, wherein the insertion hole is provided in a portion other than the central portion of the opposite side portion.

  Further, the fire detection device according to appendix 6 is the fire detection device according to appendix 5, wherein the rib on the central side of the opposite side portion among the plurality of ribs is the thickest rib among the plurality of ribs. The rib is thinner than the rib, or the rib is narrower than the widest rib.

(Additional effects)
According to the fire detection device of appendix 1, since the material of some of the plurality of ribs is different from the material of some of the other ribs, for example, only some of the ribs are made of a translucent material. By forming the light, it is possible to guide the light illuminated from the display means accommodated inside the housing to the outside of the fire detection device via the partial rib and the insertion hole. Therefore, since there is no need to provide a display hole for guiding the light to be examined from the display means to the outside, the conventional technique (technique in which the protector and the display hole are exposed to the outside) is required. Thus, the design of the fire detection device can be maintained. Also, because the shape of some ribs among the plurality of ribs is different from the shape of some other ribs, compared to the case where the plurality of ribs are the same shape, depending on the installation status of the fire detection device, It becomes easy to equalize the inflow amount of the airflow flowing into the guard means from each direction. Therefore, the inflow property of the airflow of the fire detection device can be improved.

  According to the fire detection device according to appendix 2, only a part of the ribs is formed of a translucent material, and the light irradiated from the display means passes through the ribs formed of the translucent material. Since a plurality of ribs are configured so as to be guided to the outside of the detection device, a part of the ribs of the guard means can function as a light guide while ensuring the strength of the guard means. It becomes possible to make light easy to visually recognize in various directions.

  According to the fire detection device according to attachment 3, since the thickness of the plurality of ribs is set based on the inflow amount or the inflow direction of the airflow flowing into the guard means, the inflow amount or inflow of the airflow flowing into the guard means The thickness of the plurality of ribs according to the direction can be set, and the inflow property of the airflow to the guard means can be ensured while maintaining the durability of the guard means.

  According to the fire detection device of appendix 4, the rib formed of the translucent material is a rib that is thicker than the thinnest rib among the plurality of ribs. Since it is easier to guide the light emitted from the display means to the outside of the fire detection device while suppressing damage to the ribs of the formed ribs, the durability of the ribs made of translucent material is improved. However, the display function of the fire detection device can be further maintained.

  According to the fire detection device of appendix 5, since the insertion hole is provided in a portion other than the central portion of the portion on the opposite side portion, the insertion hole is formed in the central portion of the opposite side portion. Thus, it is difficult to receive restrictions on the mounting of the heat sensing means and the display means, so that the mountability of the heat sensing means and the display means can be maintained.

  According to the fire detection device of appendix 6, the rib on the center side of the opposite side portion among the plurality of ribs is a rib having a thickness thinner than the thickest rib among the plurality of ribs, or most Since the rib is narrower than the wide rib, when the insertion hole is provided in a portion other than the central portion of the opposite side portion, the inflow amount of the airflow flowing from each direction in the guard means is uniform. Therefore, the inflow property of the airflow to the guard means can be improved.

DESCRIPTION OF SYMBOLS 1 Fire detection apparatus 2 Installation surface 10 Mounting base 20 Outer cover 21 Outer cover main body 22 Top surface part 23 1st rib part 24 2nd rib part 30 Inner cover 30a 1st opening part 40 Inflow space 50 Insect net 60 Detection space 70 Detection part Cover 70a 2nd opening 80 Detection part main body 81 Base part 90 Terminal board 91 Mounting member 100 Board | substrate 104a Light guide 110 Heat sensing part 120 Insertion hole 130 Guard part 131 1st guard side rib 132 2nd guard side rib 133 3rd guard Side rib 134 Fourth guard side rib 135 Guard side connecting portion D Predetermined distance H1 Ceiling height H2 Eye height HM

Claims (6)

It is a fire detection device attached to the installation surface of the installation object, and a fire detection device for detecting a fire in the monitoring area,
A housing,
A heat sensing means for detecting the fire, wherein a part of the heat sensing means is accommodated in the housing, and the side of the housing is opposite to the side on the installation surface side Heat sensing means provided so that the other part of the heat sensing means is exposed to the outside of the fire detection device through an insertion hole formed in the opposite side portion which is the side portion of the side,
Guard means provided to cover the other part of the heat sensing means and the periphery of the insertion hole on the opposite side portion, and includes guard means having a plurality of ribs,
The material of some of the plurality of ribs is made different from the material of some other ribs, or the shape of some of the plurality of ribs is made different from the shape of some other ribs. The
Fire detection device. Display means provided inside the housing, comprising display means for displaying predetermined information by irradiating light toward the outside of the fire detection device through the insertion hole,
Only the part of the ribs is formed of a translucent material,
The plurality of ribs are configured so that light emitted from the display means is guided to the outside of the fire detection device through ribs formed of the light-transmitting material.
The fire detection device according to claim 1. Based on the inflow amount or inflow direction of the airflow flowing into the guard means, the thickness of the plurality of ribs was set,
The fire detection device according to claim 1 or 2. The rib formed of the translucent material is a rib that is thicker than the thinnest rib among the plurality of ribs.
The fire detection device according to any one of claims 1 to 3. The insertion hole is provided in a portion other than the central portion of the opposite side portion.
The fire detection device according to any one of claims 1 to 4. Among the plurality of ribs, the rib on the central side of the opposite side portion is a rib having a thickness thinner than a rib having the greatest thickness among the plurality of ribs, or a width narrower than a rib having the largest width. Rib,
The fire detection device according to claim 5.

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