JPS5818150A - Light depreciation type smoke detector - Google Patents
Light depreciation type smoke detectorInfo
- Publication number
- JPS5818150A JPS5818150A JP11516281A JP11516281A JPS5818150A JP S5818150 A JPS5818150 A JP S5818150A JP 11516281 A JP11516281 A JP 11516281A JP 11516281 A JP11516281 A JP 11516281A JP S5818150 A JPS5818150 A JP S5818150A
- Authority
- JP
- Japan
- Prior art keywords
- light
- main body
- sensor
- optical path
- smoke detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
Abstract
Description
【発明の詳細な説明】
本発明は、光学素子と光反射鏡を用いたスポットタイプ
方式の減光式煙感知器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spot type dimming type smoke detector using an optical element and a light reflecting mirror.
スポットタイプ方式の減光式煙感知器は、感知器筐体内
にお−て発光素子から受光素子へ到遍する光量の所定減
光率を計測するものであシ、この減光率を的確に計測す
るためには、小さな容器から成る感知器筐体内において
光路長を一定以上の長さくしなければならず、その対策
として光反射鏡を用いる技術が考えられている。ところ
が煙感知Ｉ！Ｉ＃ｉ、煙の侵入を検出するものであるか
ら、・この煙検出部において塵埃等を多量に含む空気中
に上記光反射鏡がさらされることとなり、この光反射鏡
の表面が塵埃等の付着により汚れ、光反射書能を著しく
低下して感知器としての働きをなさなくなる欠点を有し
ていた。また上記光反射鏡は、発光素子からの光を複数
回往復反射させて光通路を構成する屯のであるから、表
面の汚れ社他の光学素子よシも４？ＦＫｌｌ能上の悪影
響を受けやすいものである。Spot-type dimming type smoke detectors measure the predetermined attenuation rate of the amount of light that reaches the light-receiving element from the light-emitting element within the sensor housing. In order to make measurements, the optical path must be longer than a certain value within the sensor housing, which is a small container. As a countermeasure, a technique using a light reflecting mirror has been considered. However, smoke detection I! I#i, since it detects the intrusion of smoke, the above-mentioned light reflecting mirror is exposed to air containing a large amount of dust etc. in this smoke detection part, and the surface of this light reflecting mirror is exposed to dust etc. It has the disadvantage that it gets dirty due to adhesion, significantly lowering its light reflection writing ability and making it unable to function as a sensor. Furthermore, since the above-mentioned light reflecting mirror is a mirror that forms an optical path by reflecting the light from the light emitting element back and forth multiple times, it is also possible to avoid dirt on the surface and other optical elements. It is susceptible to adverse effects on FKll performance.
本発明は上記点に鑑みてなされ喪もので、表面汚れによ
る悪影響を最４受は中すい光反射鏡を、感知器本体に対
し容易に着脱できる装着構造を採るととＫより、保守点
検の際、簡単に光反射鏡の表面磨きをなし得て上記した
従来の欠点を−切解消する減光式煙感知器を提案するも
のである。The present invention has been made in view of the above points, and has been proposed by K. to avoid the negative effects of surface contamination by adopting a mounting structure that allows a medium-dimension light reflecting mirror to be easily attached to and detached from the sensor body. The present invention proposes a dimming type smoke detector which eliminates the above-mentioned conventional drawbacks by easily polishing the surface of the light reflecting mirror.
以下図ｍＫ示す実施例に基づいて本発明を説明する。第
１図は本発明煙感知器の縦断面図、第２図社カバーを外
した状態の分解斜視図、第３図は要部平Ｉｉ図である。The present invention will be described below based on an embodiment shown in Figure mK. FIG. 1 is a longitudinal sectional view of the smoke detector of the present invention, FIG. 2 is an exploded perspective view with the cover removed, and FIG. 3 is a plan view of the main part.
上記各図において本発明の減光式煙感知器は、一対の光
反射鏡１０．１０を相対向させて保持した反射鏡保持［
１３を光学素子を備えた感知器本体ｌの一端面に着脱自
在に固定すると共に、上記光反射鏡１０を介して光通路
１２を形成し、且つ感知器本体１に外カバー１７を調合
してこの外力／（−１７と感知器本体ｌとの間で煙検出
部１８を般社て成る。In each of the above figures, the dimming type smoke detector of the present invention has a reflector holding [
13 is removably fixed to one end surface of the sensor main body l provided with an optical element, an optical path 12 is formed via the light reflecting mirror 10, and an outer cover 17 is provided on the sensor main body 1. The smoke detection section 18 is constructed between this external force /(-17) and the sensor main body l.
感知器本体ｌは、その−例として上枠ＩＡと下枠ＩＢと
を周縁において嵌着することにより、内部に煙が流入し
ない密封構造として形成しである。For example, the sensor main body 1 is formed by fitting an upper frame IA and a lower frame IB at their peripheries to form a sealed structure that prevents smoke from flowing into the interior.
この感知器本体１の内部に、発光素子２と受光素子３と
これらの電気回路４を収納するもので、実施例にあって
は、これらを回路基板５上に取付け、該基板５をビス６
で上枠１ムの裏面に固着するようＫしである。もつとも
上記各光学素子は、本体１内の下枠ＩＢ上に取付けても
、あるいは本体ｌｔの表面上に取付けてもよい。A light emitting element 2, a light receiving element 3, and an electric circuit 4 for these are housed inside the sensor main body 1. In the embodiment, these are mounted on a circuit board 5, and the board 5 is fixed with screws 6.
It is K-shaped so that it is fixed to the back side of the upper frame 1. Of course, each of the optical elements described above may be mounted on the lower frame IB within the main body 1, or may be mounted on the surface of the main body lt.
感知器本体１の一端面には内側に凹陥させた空間部７を
形成し、この空間部７の相対向する壁面８．８に凹部８
ａを形成し、該凹部８ａＫ上記反射鏡保持板１３を装着
するようにしである。すなわち、保持板１３は対向する
凹部８ｍ、８ｍの全体形状に合致する大きさにて形成し
、上方よ）該凹部ｇｍ、８ａＫ差し込み装着した後、中
央部のビスホール１４からビス１５を本体ｌのネジ孔１
６に螺合して、該保持［１３を本体ＩＫ着脱自在に固定
するようにしである。上記のように、保持板１３を空間
部７の凹゛部８ｍ、８ａｌ（装着することによシ、固定
支持が一層強固になされる。もつとも本体ｌの平端面上
に載置固定するものであってもよい。An inwardly recessed space 7 is formed on one end surface of the sensor body 1, and a recess 8 is formed on the opposing wall surface 8.8 of this space 7.
A is formed in the concave portion 8aK, and the reflecting mirror holding plate 13 is mounted in the recessed portion 8aK. That is, the holding plate 13 is formed in a size that matches the overall shape of the opposing recesses 8m and 8m, and after inserting and mounting the recesses gm and 8aK (from above), insert the screw 15 from the screw hole 14 in the center of the main body l. screw hole 1
6 to fix the holder [13 in a detachable manner to the main body IK. As mentioned above, by attaching the holding plate 13 to the concave portions 8m and 8al of the space 7, the fixed support is further strengthened. There may be.
上記反射値保持板１３は、全体を断面略コ字状Ｋｉｔ成
してその相対向１ｉＫ溝状の反射鏡保持部９゜９を形成
し、該保持部９．９に光反射鏡１０．１０を側方から差
し込み装着するようにしである。もつともこの反射鏡保
持部９，９ｔｉ、上方よシ光反射ｆＩ１１１０ 、１０
を差し込み固定する構造であってもよい。The reflection value holding plate 13 has a substantially U-shaped cross section as a whole, and a reflecting mirror holding part 9.9 is formed in the shape of a groove facing each other. It is designed to be installed by inserting it from the side. Of course, these reflecting mirror holding parts 9, 9ti reflect light from above fI1110, 10
It may have a structure in which it is inserted and fixed.
上記本体ｌの壁１ｉ１８．８Ｋｋける非対向部の端部に
は、光が透過する一対の透光部１１．１１を設け、との
透光部１１．１１の内側前ｉ１に上記した発光素子２と
受光素子３が位置するようＫしである。この透光部１１
は一層として、壁面８に通孔を穿設して光が透過するよ
うにしてあシ、またとの通孔に対応する上記反射鏡保持
部１３の両縦壁１３ｍ 、 １３ａ Ｋ同じく通孔を穿
設してなシ、これら二重に連続する各通孔は、第３図に
示すように光反射９１０によって閉塞され、との光反射
鏡１０には上記各通孔に対応する箇所に１裏面の反射膜
を剥離した通過部を設けてあり、この二重通孔と通過部
とＫよって上記透光部１１が実質的に構成される。A pair of light-transmitting parts 11.11 through which light passes are provided at the ends of the non-opposing parts of the wall 1i18.8Kk of the main body l, and the above-mentioned light-emitting element is placed on the inside front i1 of the light-transmitting part 11.11. 2 and light receiving element 3 are positioned. This transparent part 11
In addition, through holes are bored in the wall surface 8 to allow light to pass through, and holes are also formed in both vertical walls 13m, 13a K of the reflector holding portion 13 corresponding to the through holes between the reeds and the reeds. Without drilling, each of these double continuous holes is closed by a light reflection 910 as shown in FIG. A passage portion is provided by peeling off the reflective film on the back surface, and the above-mentioned light-transmitting portion 11 is substantially constituted by this double passage hole, the passage portion, and K.
上記透光部１１．１１を介して、発光素子２と受光素子
３との間で相対向する光反射鏡１０．１０によって光通
路１２が形成される。すなわち第３図に示すように、発
光素子２から透光部１１を介し一定の角１ＩＩＹｒもっ
て照射された光は、一対の光反射［１０、１０を複数回
往復反射して、他方の透光部１１を介して受光素子３に
受光される。・このよう和光反射鏡１０．１０を用いる
ことＫよ〉長い光通路１２を形成することができて、煙
発生による所定減光率を確実に得ることができる。上記
光反射鏡１０は、ガラス、樹脂もしくは金属薄板等を用
いた平面鏡によって形成される。An optical path 12 is formed between the light emitting element 2 and the light receiving element 3 by the light reflecting mirrors 10.10 facing each other via the light transmitting portion 11.11. That is, as shown in FIG. 3, the light emitted from the light emitting element 2 through the light transmitting part 11 at a constant angle 1IIYr is reflected back and forth multiple times through a pair of light reflections [10, 10, The light is received by the light receiving element 3 via the portion 11. - By using the Wako reflector 10.10 in this manner, a longer optical path 12 can be formed, and a predetermined light attenuation rate due to smoke generation can be reliably obtained. The light reflecting mirror 10 is formed of a plane mirror using glass, resin, a thin metal plate, or the like.
上記した光通路１２は第４図のよう゛にして構成するこ
ともできる。すなわち、この実施内の場合は、発光素子
２と受光素子３を感知器本体１の外部における反射鏡保
持板１０のｉｓｗ側部に取付けて、発光素子２からの光
を透光部を介することなく直接光反射鏡１０に照射して
、光通路１２を形成するようＫしである。The optical path 12 described above can also be constructed as shown in FIG. That is, in the case of this implementation, the light emitting element 2 and the light receiving element 3 are attached to the isw side of the reflector holding plate 10 outside the sensor main body 1, and the light from the light emitting element 2 is passed through the transparent part. It is designed so that the light is directly irradiated onto the light reflecting mirror 10 to form an optical path 12.
次に感知器本体１の端面（表面部）Ｋは外カバー１７を
嵌着して、この外カバー１７と本体ｌ端面部との間で煙
検出部１８を形成するようにしである。この煙検出部１
８は、上記光通路１２を略中央に位置せしめて構成され
る。上記外カバー１７と感知器本体ｌとの間の外周部に
は、円！形状の綱部１９を装着して、煙検出部１８に央
部が侵入するのを防止しである。Next, an outer cover 17 is fitted onto the end surface (surface portion) K of the sensor body 1, so that a smoke detection portion 18 is formed between the outer cover 17 and the end surface portion of the main body I. This smoke detection section 1
8 is constructed with the optical path 12 positioned approximately at the center. A circle! A shaped rope portion 19 is attached to prevent the central portion from entering the smoke detection portion 18.
上記した本発明の減光式煙感知器は、発光素子２と受光
素子３と電気回路４を備えた感知器本体ＩＫＴｈいて、
一対の光反射鏡−ｉｐ Ｉ １０を備えた反射鏡保持板
１３を装着することによって任意長さの光通路１２管形
成し、この光通路１２を含む煙検出部１８に煙が侵入し
た場合に光量の減光率を電気回路４で読み取るものであ
る。そして感知器の保守点検にあたっては、外カバー１
７を本体１から取外し、且つ光反射鏡１０．１０を保持
板１３ごと本体ｌから取外して、鏡の表面磨き清掃を行
なう。The dimming type smoke detector of the present invention described above includes a sensor main body IKTh comprising a light emitting element 2, a light receiving element 3, and an electric circuit 4.
By attaching a reflector holding plate 13 equipped with a pair of light reflectors - IP I 10, 12 optical passages of arbitrary length are formed, and when smoke enters the smoke detection section 18 including this optical passage 12, The attenuation rate of the amount of light is read by an electric circuit 4. For maintenance and inspection of the sensor, please use the outer cover 1.
7 is removed from the main body 1, and the light reflecting mirror 10, 10 along with the holding plate 13 is removed from the main body 1, and the surface of the mirror is polished and cleaned.
本発明の減光式煙感知器は以上のように、光通路を形成
する一対の光反射鏡を、保持板に取付けて感知器本体く
着脱自在に装着するようＫしたことから、煙検出光学機
器として最も表面汚れを嫌う上記光反射鏡を、保持板を
感知器本体から取外すことＫより本体と独立して取出す
ことができ、したがって鐘表面の磨き清掃を極めて容品
になすことができる。しかも上記光反射鏡は、外カバー
を外した後に保持板を本体から取外すととによって本体
から取出し得て、その取出し装着作業を極めて簡単にな
すことができ感知器の保守点検上極めて有利である。As described above, the dimming type smoke detector of the present invention is designed so that the pair of light reflecting mirrors forming the optical path are attached to the holding plate and removably attached to the sensor body. The light reflecting mirror, which is most sensitive to surface contamination as a device, can be taken out independently of the main body by removing the holding plate from the main body of the sensor, and therefore the surface of the bell can be polished and cleaned in an extremely convenient manner. Moreover, the light reflecting mirror can be taken out from the main body by removing the outer cover and then removing the retaining plate from the main body, making the removal and installation work extremely easy, which is extremely advantageous in terms of maintenance and inspection of the sensor. .
第１図は本発明感知器の縦断面図、鮪２図はカバーを外
し良状態の分解斜視図、第３図は要部平面図、第４図は
他の実施例の要部平面図である。
１・・・感知器本体 ２・・・発光素子３・・・
受光素子 ４・・・電気回路５・・・回路基板
６・・・ビス７００．空間部 ８
・・・壁面８龜・・・凹部 ９・・・反射
鏡保持部１０−・・光反射鏡 １１・・・透光部
１２・・・光通路 １３・・・反射鏡保持板
１５・・・ビス １７・・・外力／（−１
８・・・煙検出部 １９・・・綱部出願人 ホ
ーチキ株式会社Fig. 1 is a longitudinal sectional view of the sensor of the present invention, Fig. 2 is an exploded perspective view of the sensor in good condition with the cover removed, Fig. 3 is a plan view of the main part, and Fig. 4 is a plan view of the main part of another embodiment. be. 1...Sensor body 2...Light emitting element 3...
Light receiving element 4... Electric circuit 5... Circuit board 6... Screw 700. Space section 8
...Wall surface 8...Recessed part 9...Reflector holding part 10-...Light reflecting mirror 11...Transparent part 12...Light path 13...Reflector holding plate 15... Screw 17...External force/(-1
8...Smoke detection section 19...Applicant Tsunabe Hochiki Co., Ltd.
Claims (1)
反射鏡保持板を、発光素子と受光素子と所望の電気回路
と′ｔ４ｉｌｌｌえた感知器本体の一端１１１ｉＫ：着
脱自在に固定し、上記一対の光反射鏡を介して上記発光
素子と受光素子との間に光通路を形成し、且つ上記感知
器本体の一端面に外カバーを嵌合させてこの外カバーと
感知器本体との間で煙検出部を形成したことを特徴とす
る減光式煙感知器。A reflector holding plate with a substantially U-shaped cross section that holds a pair of light reflectors facing each other is removably fixed at one end of the sensor body, which is connected to the light emitting element, the light receiving element, and the desired electric circuit. , an optical path is formed between the light emitting element and the light receiving element via the pair of light reflecting mirrors, and an outer cover is fitted to one end surface of the sensor main body, so that the outer cover and the sensor main body are connected to each other. A dimming type smoke detector characterized in that a smoke detection part is formed between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11516281A JPS5818150A (en) | 1981-07-24 | 1981-07-24 | Light depreciation type smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11516281A JPS5818150A (en) | 1981-07-24 | 1981-07-24 | Light depreciation type smoke detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5818150A true JPS5818150A (en) | 1983-02-02 |
Family
ID=14655863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11516281A Pending JPS5818150A (en) | 1981-07-24 | 1981-07-24 | Light depreciation type smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5818150A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62229048A (en) * | 1986-03-31 | 1987-10-07 | Agency Of Ind Science & Technol | Method and apparatus for measuring smoke |
| JP2007040887A (en) * | 2005-08-04 | 2007-02-15 | Toyota Motor Corp | Gas analyzer |
| JP2007322385A (en) * | 2006-06-05 | 2007-12-13 | Toyota Motor Corp | Gas analyzer, and sensor unit in gas analyzer |
-
1981
- 1981-07-24 JP JP11516281A patent/JPS5818150A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62229048A (en) * | 1986-03-31 | 1987-10-07 | Agency Of Ind Science & Technol | Method and apparatus for measuring smoke |
| JP2007040887A (en) * | 2005-08-04 | 2007-02-15 | Toyota Motor Corp | Gas analyzer |
| JP2007322385A (en) * | 2006-06-05 | 2007-12-13 | Toyota Motor Corp | Gas analyzer, and sensor unit in gas analyzer |
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