JP2020004066A - Fire detector - Google Patents

Abstract

To provide a fire detector that can be excellent in design because an opening for introducing smoke or hot airflow is difficult to see when looking up from below.SOLUTION: A fire detector 1 attached to a mounting surface and detecting a fire has a top plate 9 provided below a main body 5 via a support post 7. An opening 11 for introducing airflow such as smoke or hot airflow into the main body is formed between the top plate and the main body, the top plate is provided so as to protrude outward from the support post, and an overhang length from the support post is set to be equal to or greater than the height of the opening.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fire detector for detecting smoke and heat caused by a fire.

The fire detector includes a smoke detector that detects a fire by introducing smoke from a fire, and a heat detector that detects a fire by introducing a hot airflow caused by the fire.
An example of a smoke detector is disclosed in, for example, Patent Document 1, and is provided so as to extend downward to a lower side in a state where the main body is installed and a main body in which a detector is built. It has a top plate supported by a support, and the space between the top plate and the main body portion is a smoke introduction portion for introducing smoke. In this example, the diameter of the top plate is set to about half of the diameter of the main body.
In addition, an insect repellent net for insect repellent is provided inside the support post so as to surround the smoke introduction portion.

As another example, there is an alarm device disclosed in Patent Document 2, for example. The housing of the alarm device includes a base fixed to an installation surface such as a ceiling or a wall, and a main body detachably locked to the base. The main body is formed by integral molding of resin and has a circular bottomed frame shape, and the bottom (the part that becomes the lower surface in the installed state) becomes a top plate, and a fluid such as smoke is applied to the peripheral surface. An opening for introduction is provided, and a vertical bar and a horizontal bar are provided in the opening.
The diameter of the top plate is formed substantially equal to the diameter of the base.

JP-A-6-124390 JP 2010-39936 A

  Although the above two examples have been described with respect to the appearance of the fire detector, a common point in these cases is that a top plate (top plate) is provided below the main body or the base via a vertical bar or a horizontal bar. Have been. An opening is provided between the top panel and the main body, and smoke or hot air is introduced from the opening to detect a fire.

  By the way, in recent years, disaster prevention equipment installed indoors in a building has also been required to have designability. A fire detector, which is a kind of disaster prevention equipment, is installed on a ceiling or the like. From the viewpoint of the design of the ceiling or the like, it is preferable that the fire detector be inconspicuous. Since the ceiling surface is generally white, the fire detector housing is made the same color as the ceiling surface or the like, or has a color close to white in order to make the fire detector inconspicuous. I have.

However, in the conventional fire detectors exemplified in Patent Documents 1 and 2, there is an opening between the top panel (top panel) and the main body or between the top panel (top panel) and the base section. Props or vertical bars are provided.
In the smoke detector of Patent Document 1, an insect net is provided in the opening to prevent insects and the like from entering the inside.
Since the inside of the opening is shaded, when looking up from below, the inside of the opening looks black. For this reason, even if the colors of the main body and the top panel are unified to white, the portion of the opening appears black, that is, a so-called two-tone color.
Further, when an insect repellent net is provided, the insect repellent net is silver, and in this case also, there is a problem that a sense of unity as a whole is lost and the design is impaired.
As described above, in the conventional fire detector, there is a problem that it is difficult to make the design excellent because the opening for introducing the smoke and the hot air flow is visible from below.

  The present invention has been made in order to solve such a problem, and provides a fire detector in which an opening for introducing smoke or a hot air flow is difficult to see when looking up from below, and which can be excellent in design. It is intended to be.

(1) A fire detector according to the present invention is a fire detector attached to a mounting surface to detect a fire,
An opening for introducing an airflow such as smoke or a hot airflow into the main body is formed between the top panel and the main body, the top having a top plate provided below the main body via a support. ,
The top plate is provided so as to protrude outward from the support, and the length of the protrusion from the support is set to be equal to or greater than the height of the opening.

  (2) In addition, in the device described in (1) above, the main body has a projecting surface projecting outward from the support, and a surface of the main body including the projecting surface and a surface of the top panel. In which a pattern is printed or transferred.

  (3) In the device according to the above (1) or (2), an uneven portion for adjusting the flow of the air current is provided on at least an upper surface of the overhang portion of the top plate. .

  (4) In any one of the above (1) to (3), the opening is disposed above the top plate so as to face the projecting surface of the top plate and cooperates with the top plate. An air guide plate for guiding an air flow such as smoke or a hot air flow is provided in the section.

  (5) Further, in the above (4), the air guide plate is characterized in that an outer peripheral end surface of the air guide plate is a light guide functioning as a confirmation lamp.

(6) A fire detector according to the present invention is a fire detector that is attached to a mounting surface and detects a fire by smoke.
A top panel provided below the main body, an opening provided between the top panel and the main body to introduce smoke into the main body, and an insect net provided in the opening. And
The top panel is provided so as to protrude outward from the insect repellent net, and the length of the projection from the insect repellent net is set to be equal to or greater than the height of the opening.

  The fire detector according to the present invention has a top plate provided below a main body portion through a support, and an airflow such as smoke or a hot air flow is applied to the main body portion between the top surface plate and the main body portion. An opening to be introduced is formed, the top plate is provided so as to protrude outward from the support, and the overhang length from the support is set to be equal to or greater than the height of the opening. When the fire detector is looked up from below, the opening is blocked by the overhanging portion of the top panel, so that the opening is difficult to see and the design of the appearance is not hindered by the opening. Therefore, the appearance of the fire detector can be made excellent in design.

It is a perspective view of a fire detector concerning an embodiment of the invention. It is a side view of the fire detector shown in FIG. FIG. 2 is an exploded perspective view of the fire detector shown in FIG. 1. FIG. 2 is an explanatory diagram of a method of setting a length of an overhang of a top panel in the fire detector shown in FIG. 1. It is explanatory drawing of the uneven | corrugated part provided in the inner surface of the top board of the fire detector shown in FIG. 1 (the 1). It is explanatory drawing of the uneven | corrugated part provided in the inner surface of the top board of the fire detector shown in FIG. 1 (the 2). FIG. 2 is a diagram showing a comparison between the fire detector shown in FIG. 1 and a conventional example in appearance. It is explanatory drawing of the removal method from the base of the fire detector shown in FIG. 1 (the 1). It is explanatory drawing of the removal method from the base of the fire detector shown in FIG. 1 (the 2). FIG. 2 is an explanatory diagram of a method of printing on a main body of the fire detector shown in FIG. 1. FIG. 2 is an explanatory diagram of a printing method of the fire detector shown in FIG. 1 on a top panel. It is an explanatory view for explaining a problem in the case of printing on a housing of a conventional example. It is a figure which shows the state which printed the checkerboard pattern on the surface of the fire detector shown in FIG. 1 (the 1). It is a figure which shows the state which printed the checkerboard pattern on the surface of the fire detector shown in FIG. 1 (the 2).

The present embodiment will be described with reference to the drawings. Each drawing is for describing a feature of the present invention, and portions not necessary for the description of the present invention are simplified.
In the following description, the directions “up” and “down” are directions in a state where the fire detector is mounted on the ceiling surface, “up” is the ceiling side, and “down” is the floor side. It is.

The fire detector 1 of the present embodiment is a smoke detector that is attached to a mounting surface such as a ceiling surface and detects, for example, smoke to detect a fire. As shown in FIGS. It has a main body 5 detachably attached to the fixed base 3 (see FIG. 4), and a top plate 9 provided below the main body 5 via a support column 7. An opening 11 for introducing an airflow such as smoke or a hot airflow into the main body 5 is formed therebetween.
An air guide plate 13 is provided above the top plate 9 so as to face the projecting surface of the top plate 9 and guide the smoke to the opening 11 in cooperation with the top plate 9.
Hereinafter, each configuration will be described in detail.

<Main unit>
The main body 5 is detachably attached to the base 3 fixed to an attachment surface such as a ceiling surface. As shown in FIG. 3, the main body 5 has a circular opening 15 on the lower surface, and a smoke detector 17 formed of a labyrinth or the like is provided in the main body 5. A substrate 19 is provided on the upper end surface of the smoke detector 17, and two LEDs 21 serving as a light source of a confirmation lamp are provided on the outer peripheral edge of the lower surface of the substrate 19.
In addition, an insect screen (not shown) is provided on the outer periphery of the smoke detector 17.

  Further, the main body 5 has a projecting surface 22 projecting outwardly from the column 7, and the outer surface is formed to have a shape as small as possible in inclination so that a pattern or the like can be printed by a printer such as an ink jet printer. Is preferred.

<Top board>
The top plate 9 is formed of a flat circular plate provided below the main body 5 with the support 7 interposed therebetween. However, the top plate 9 is not necessarily required to be flat, and may have a curved shape. It is preferable that Instead of printing, a sealing member such as a cutting seal may be attached. Even in this case, the top plate 9 and the main body 5 preferably have a flat surface or a shape close to a flat surface.

  Further, the top plate 9 may be formed integrally with the housing constituting the main body 5, or may be attached to the main body 5 as a separate component. However, when the top panel 9 and the main body 5 are integrally formed, printing with a printer such as an ink jet printer becomes difficult. Therefore, it is preferable that both are formed as separate parts and integrated at the time of assembly.

The top panel 9 is provided so as to project outward (laterally in the mounted state) from the column 7 that supports the top panel 9, and the length L of the projection from the column 7 is greater than the height H of the opening 11. It is set (see FIG. 2).
By setting the overhang length L in this manner, when the fire detector 1 is viewed from below, the opening 11 is hidden by the top panel 9 so that it is difficult to see, and the opening 11 does not obstruct the appearance. In addition, it is possible to make the appearance of the fire detector 1 excellent in design.

  Further, the fire detector 1 of the present embodiment is a smoke detector, which is provided with an insect repellent net as described above. However, since the insect repellent net is usually silver, the main body 5 and the like are white. In this case, if the insect repellent net is visible, it becomes a two-tone color, which is not preferable in design. In this case, in order to make the insect screen difficult to see when the fire detector 1 is viewed from below, the top panel 9 is provided so as to protrude outward from the insect screen, and the length L ′ of the projecting from the insect screen is provided. May be set to be equal to or higher than the height H of the opening 11.

  In general, the insect repellent net is provided inside the column 7. Therefore, when the extension length is set based on the insect net, the diameter of the top panel 9 is shorter than when the extension length is set based on the column 7. Become. Therefore, in the case where the overhang length is set based on the insect repellent net, the strut 7 is not always difficult to see, but there is a possibility that the strut 7 is allowed to be seen and at least the insect repellent net is hardly seen. Therefore, in that case, the overhang length may be set based on the insect net.

The reason why the overhang length L of the top panel 9 from the column 7 is set to be equal to or greater than the height H of the opening 11 will be described with reference to FIG. 4 showing a state in which the fire detector 1 is installed on the ceiling surface. .
The position and appearance of the line of sight when looking up the fire detector 1 from below will be discussed.
First, when looking up from directly below, that is, when there is a line of sight at the center line of the fire detector 1 shown in FIG. 4, the opening 11 is hidden behind the top panel 9 and cannot be seen at all. As the position of the line of sight deviates from the center line and the angle α formed between the line of sight and the center line increases, the visible range of the portion hidden by the top panel 9 (the overhanging surface 22 of the main body 5) increases. Then, as shown in FIG. 4, when α is 45 degrees, the upper end of the support 7 or the insect repellent net is visible. In other words, if α is equal to or less than 45 degrees, when the fire detector 1 is looked up from below, the support 7 is not visible, and the top panel 9 and the overhanging surface 22 of the main body 5 are visible. When α is 45 degrees, the relationship between the overhang length L and the height H of the opening 11 is L = H.

When looking up at the fire detector 1, it is assumed that the state where α is 45 degrees or less is normal. Therefore, when α is 45 degrees or less, in order to make the opening 11 invisible, L may be set to be equal to or higher than the height H of the opening 11.
The specific appearance of the fire detector 1 from below will be described later.

  Since the top plate 9 is provided so as to protrude outward, the upper surface (the surface on the opening 11 side) of the top plate 9 functions as a guide wall for guiding smoke to the opening 11. Therefore, an uneven portion 23 may be provided on the upper surface of the overhanging portion of the top panel 9 to make the flow of smoke more smooth. As an example of the uneven portion 23, as shown in FIG. 5, a plurality of ribs 25 are provided radially at predetermined intervals in the circumferential direction, or formed on the surface of a golf ball as shown in FIG. The dimples 27 similar to the dimples may be provided at predetermined intervals in the circumferential direction.

In the above example, the inflow of smoke is made smooth. However, it is also possible to restrict the inflow of smoke as necessary, that is, to make it more difficult for the inflow of smoke. That is, the uneven portion 23 has a function of adjusting the inflow of smoke.
In addition, by providing the uneven portion 23, the surface area can be increased, and a function of trapping steam or the like that should not flow in can be provided.
In addition, since the uneven portion 23 provided on the upper surface of the top panel 9 is not visible from the outside, the shape, arrangement, and the like can be determined from the functional surface without worrying about the design.

<Air guide plate>
The air guide plate 13 is formed of a donut-shaped plate attached to the main body 5 via a support portion 29, and is arranged to face the projecting surface of the top plate 9. The air guide plate 13 is arranged at a substantially middle position in the height direction of the opening 11 in a state of floating in the air and opposed to the projecting surface of the top plate 9, and cooperates with the top plate 9 to form the opening 11. It has the function of guiding smoke to
In addition, the air guide plate 13 is formed of a transparent or translucent acrylic plate, and also has a function as a confirmation lamp whose peripheral end surface shines by introducing and guiding the light of the LED 21. That is, the air guide plate 13 is a light guide, and the outer peripheral end surface of the air guide plate 13 functions as a confirmation light. For this reason, the air guide plate 13 is provided with a light guide leg 31 for guiding the light of the LED 21 corresponding to the position where the LED 21 is provided.
When the air guide plate 13 does not have a function of a confirmation light, it is not necessary to be transparent or translucent. However, even if the air guide plate 13 is opaque, if the plate thickness of the air guide plate 13 is thin or the light emission intensity is strong, the LED 21 may be disposed on the back surface of the air guide plate 13 to make the air guide plate 13 It is also possible to make it shine, in which case it can also function as a confirmation light.
Here, the confirmation light is a lamp that lights or flashes when the fire detector 1 emits an alert to visually notify the fire detector 1 that has emitted the alert.

The lower surface of the air guide plate 13 is located inside the opening 11, and the inside of the opening 11 is slightly dark between the top panel 9 and the main body 5, so that the air guide plate 13 functions as a confirmation light. By doing so, it becomes easy to confirm the light as the confirmation light without being disturbed by external light.
On the other hand, if the air guide plate 13 is made transparent, it does not stand out even if the shape is large, and does not hinder the overall design constituted by the main body 5 and the top plate 9. Further, if it is transparent, even when the colors of the main body 5 and the top panel 9 are unified or a pattern is provided, they are not visually obstructed and do not hinder the overall design. .

  Further, the air guide plate 13 is formed thicker than the top plate 9 and has a predetermined rigidity, so that the body 5 is detached from the base 3 by a detacher as described later. You may make it function as a stop member. (See FIGS. 8 and 9)

The main operation of the fire detector 1 according to the present embodiment configured as described above will be described separately for each of the top plate 9 and the air guide plate 13.
<Function of top panel>
FIG. 7 is a diagram for explaining the operation of the external appearance of the top panel 9, in which three types of fire detectors are shown in different directions. In the figure, the left side is the invention example, the center is the conventional example A, and the right side is the conventional example B.
In FIG. 7, the uppermost one of the fire detectors is a state viewed from the side (α = 90 degrees), and the lower the lower one, the more oblique the viewing angle is (α = 60 degrees, (α = 45 degrees), and the lowermost one shows the state as viewed from directly below (α = 0 degrees).

  As shown in FIG. 7, in the example of the invention, the interior of the opening 11 is hidden by the overhang of the top panel 9 and becomes invisible because the interior of the opening 11 is slightly oblique from the sideways state. Therefore, for example, when the main body 5 and the top panel 9 of the fire detector 1 are made white, the whole becomes white when viewed from below, and becomes inconspicuous when, for example, the ceiling surface as the mounting surface is white.

  Also, when the support is visible, it is necessary to consider the direction of the support when mounting the fire detector. However, in this embodiment, since the support 7 is not visible, the fire detector can be attached without considering the direction of the support. For this reason, the mounting accuracy of the fire detector 1 is not required, and there is an effect that the mounting operation can be facilitated.

On the other hand, in the fire detector 51 of the conventional example A, the strut 53 projects outward beyond the top panel 55, and the strut 53 and the opening 57 can be seen in any state. The inside of the opening 57 becomes a shadow and dark, and when the fire detector 51 is viewed from below, the inside of the opening 57 is seen as a two-tone color, which is not desirable in design.
Further, in the case of the fire detector 61 of the conventional example B, since the support 63 is in an upright state, the support 63 is less visible than the fire detector 51 of the conventional example A. However, the inside of the support 63 or the opening 65 is completely invisible only when viewed from directly below. Generally, the fire detector is rarely viewed from directly below. The fire detector 61 of the conventional example B also has a design. Has challenges.

  When an insect repellent net is provided, a lattice-shaped bar or the like may be provided on the front surface of the insect repellent net in order to prevent deformation by contact of a finger or the like with the insect repellent net (see FIG. 7). In the present embodiment, since the top panel 9 is overhanged in this embodiment, a finger or the like does not easily come into contact with the outside, and a bar or the like from the viewpoint of protecting the insect net is not required.

<Function of air guide plate>
As shown in FIGS. 1 and 2, since the air guide plate 13 is arranged to face the overhanging portion of the top plate 9, smoke and hot airflow, etc. It has a function to guide airflow. Therefore, the airflow can be smoothly introduced into the opening 11 as compared with the case where the air guide plate 13 is not provided.
Further, the point that the air guide plate 13 functions as a confirmation light and the operation and effect of making it transparent are as described above.

  By providing the air guide plate 13 with rigidity, as shown in FIGS. 8 and 9, the air guide plate 13 may also function as a locking member when the main body 5 is detached from the base 3 by a detacher. . As shown in FIG. 8, a detachable device 33 used in the present embodiment may be a device having an engaging portion 37 formed by an elastic member such as rubber at the tip of a rod 35. The engaging portion 37 has a cylindrical shape with an open end, and has slits 39 provided at predetermined intervals on a peripheral edge of the end portion, so that the engaging portion 37 can be bent inward and outward in the radial direction.

  When the main body 5 is removed, the engaging portion 37 is approached from directly below the fire detector 1 (see FIGS. 8A and 9A), and the inner peripheral surface of the engaging portion 37 is guided. The engaging portion 37 is pushed up according to the outer peripheral surface of the plate 13. As a result, the distal end portion of the engaging portion 37 is bent, and the air guide plate 13 is inserted into the attaching / detaching device 33, and is held by the elasticity of the engaging portion 37 (FIGS. 8B and 9B). )reference). In this state, by rotating the engaging portion 37 in the removing direction, the locking of the main body 5 to the base 3 is released, and the main body 5 can be removed (see FIG. 8C).

As described above, the main body 5 and the top plate 9 may be integrally formed. However, by integrating them as separate components during assembly, printing, tampo printing or transfer by a UV printer becomes easy, and The same pattern can be printed.
FIG. 10 shows a state where printing is performed on the main body unit 5 by the printer 41, and FIG. 11 shows a state where printing is performed on the top panel 9 by the printer 41. As a condition for such printing, the step is 10 mm or less.
On the other hand, in the case of the conventional fire detector 71, as shown in FIG. 12, the main body and the top plate are integrally formed, and printing cannot be performed due to these irregularities. In such a conventional example, the outer surface of the fire detector 71 is spray-painted, and the degree of freedom in appearance is low.

FIG. 13 shows a state in which the air guide plate 13 is opaque and a checkered pattern is printed on the top panel 9 and the main body 5. FIG. 14 shows a case where the air guide plate 13 is made transparent, and a checkered pattern of the main body 5 is seen through the air guide plate 13. As described above, if the air guide plate 13 is made transparent, the air guide plate 13 does not obstruct the pattern even when the main body 5 and the top panel 9 have the same pattern.
By printing the same pattern as the ceiling pattern, the fire detector 1 can be assimilated to the ceiling and made inconspicuous.

Although the above embodiment has been described by taking the smoke detector as an example, the fire detector 1 of the present invention is not limited to the smoke detector, but also includes a heat detector that detects a hot air flow to detect a fire.
In the case of a heat sensor, since no insect screen is provided, the overhang length of the top panel 9 may be determined based on the support 7.

REFERENCE SIGNS LIST 1 fire detector 3 base 5 main body 7 support 9 top panel 11 opening 13 air guide plate 15 opening 17 smoke detector 19 board 21 LED
Reference Signs List 22 overhanging surface 23 uneven portion 25 rib 27 dimple 29 support portion 31 light guide leg portion 33 detachable device 35 rod 37 engaging portion 39 slit 41 printer 51 fire detector (conventional example A)
53 Prop 55 Top panel 57 Opening 61 Fire detector (conventional example B)
63 Prop 65 Opening 71 Fire detector (conventional example)

Claims (6)

A fire detector attached to the mounting surface and detecting a fire,
An opening for introducing an airflow such as smoke or a hot airflow into the main body is formed between the top panel and the main body, the top having a top plate provided below the main body via a support. ,
The fire detector, wherein the top panel is provided so as to protrude outward from the support, and a protruding length from the support is set to be equal to or greater than a height of the opening.   The said main-body part has an overhang | projection surface which protrudes outward from the said support | pillar, The pattern is printed or transferred on the surface including the said overhook surface in this main-body part, and the surface of the said top board. Item 2. The fire detector according to Item 1.   The fire detector according to claim 1, wherein an uneven portion for adjusting the flow of the airflow is provided on at least an upper surface of the overhanging portion of the top panel.   An air guide plate is provided above the top plate so as to face the projecting surface of the top plate and cooperates with the top plate to guide airflow such as smoke or hot airflow to the opening. The fire detector according to any one of claims 1 to 3.   The fire detector according to claim 4, wherein the air guide plate is a light guide whose outer peripheral end surface functions as a confirmation light. A fire detector attached to the mounting surface and detecting a fire by smoke,
A top panel provided below the main body, an opening provided between the top panel and the main body to introduce smoke into the main body, and an insect net provided in the opening. And
The fire detector, wherein the top panel is provided so as to protrude outward from the insect screen, and a length of the projection from the insect screen is set to be equal to or greater than the height of the opening.