JP2007065747A

JP2007065747A - Photoelectric separation type smoke sensor

Info

Publication number: JP2007065747A
Application number: JP2005247696A
Authority: JP
Inventors: Kenichi Kato; 健一加藤
Original assignee: Nohmi Bosai Ltd
Current assignee: Nohmi Bosai Ltd
Priority date: 2005-08-29
Filing date: 2005-08-29
Publication date: 2007-03-15

Abstract

<P>PROBLEM TO BE SOLVED: To secure sealability of a cover without generating strain in the cover by a screwing method, and to facilitate an installation method, when installing the corrosion-protecting or drip-protecting cover to a photoelectric separation type smoke sensor. <P>SOLUTION: In this smoke sensor, the sensor cover 2 is easily screwed to a sensor body 1 by providing the sensor body 1 having disk-shaped base, the sensor cover 2 having a hollow cylindrical shape covering the sensor body 1, and a screw part K1 and a screw part K2 in a screwing part of the sensor body 1 and the sensor cover 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、光電式分離型煙感知器に関し、特に光電式分離型煙感知器のカバーに関する内容である。 The present invention relates to a photoelectric separation type smoke sensor, and particularly to a cover of the photoelectric separation type smoke sensor.

光電式分離型煙感知器は、通常に５〜１００ｍの監視距離を隔てて発光素子を内蔵した投光器と、受光素子を内蔵した受光器とを対向配置している。大空間および高天井に取付けることが殆どである。 In the photoelectric separation type smoke detector, a projector having a built-in light emitting element and a light receiver having a built-in light receiving element are usually arranged facing each other at a monitoring distance of 5 to 100 m. Most of them are installed in large spaces and high ceilings.

従来の感知器本体の外形は略直方体で、そのカバーの材質はプラスチックまたは金属で作られたものであり、防食および防滴の構造を有してないものである。取付け場所は腐食ガス又は水分が存在する場合、感知器本体の外側に専用の防食又は防滴カバーを感知器本体に覆い、さらにカバーの後部に専用の蓋をネジ止めで密閉する。また、既設の光電式分離型煙感知器にカバーを取付ける場合、現行の構造では、感知器を一度すべて外してからカバーを設置する必要があった（例えば、特許文献１）。
特開平４−１９１９９８号公報 The outer shape of a conventional sensor body is a substantially rectangular parallelepiped, and the cover material is made of plastic or metal, and does not have a corrosion-proof or drip-proof structure. When corrosive gas or moisture is present at the mounting location, a dedicated anti-corrosion or drip-proof cover is covered outside the sensor body with the sensor body, and a dedicated lid is sealed with screws at the rear of the cover. Moreover, when attaching a cover to the existing photoelectric separation type smoke detector, in the current structure, it was necessary to install the cover after removing all the detectors once (for example, Patent Document 1).
Japanese Unexamined Patent Publication No. Hei 4-191998

上記のように構成した防食または防滴型の光電式分離型煙感知器の問題点は、カバーがネジやボルトなど複数の構成部品から成り立っており、カバーを設置する際にネジ止めをしなければならない。しかし光電式分離型煙感知器は通常スポット型感知器より体積も重量も大きく、かつ高所に設置されているので、ネジ止め程度でも容易な作業ではない。 The problem with anti-corrosion or drip-proof photoelectric separation type smoke detectors configured as described above is that the cover consists of multiple components such as screws and bolts and must be screwed when installing the cover. I must. However, the photoelectric separation type smoke detector is usually larger in volume and weight than the spot type detector, and is installed at a high place.

また、従来の感知器本体の外形に合わせると、感知器カバーの形状は直方体状で作らざるを得ない。そしてカバーを設置する際に多数のネジの締めなければならないので、その締め方によって直方体のカバーに歪みが生じ、カバーの密閉性にも影響が出てくる。 Further, if the outer shape of the conventional sensor body is matched, the shape of the sensor cover must be a rectangular parallelepiped. Since a large number of screws must be tightened when the cover is installed, the rectangular parallelepiped cover is distorted by the tightening method, and the sealing performance of the cover is also affected.

さらに、既設の光電式分離型煙感知器にカバーを取付ける場合、従来の構造では、感知器本体を一度すべて外してからカバーを設置する必要があった。感知器本体を一度外すと、再度光軸調整が必要になり、多大の現場作業が必要となってしまう。 Further, when attaching a cover to an existing photoelectric separation type smoke sensor, in the conventional structure, it is necessary to remove the sensor body once and then install the cover. Once the sensor body is removed, it is necessary to adjust the optical axis again, requiring a lot of on-site work.

本発明は、上記の課題を解決するためになされたもので、発光素子を有する投光器と受光素子を有する受光器と対向配置して投光器から受光器に信号光を投光し、両者の間に煙が侵入して受光器に投光される信号光減衰したときはこれによって火災の発生を検知するようにした光電式分離型煙感知器において、円盤型ベースを有する感知器本体と、上記感知器本体をカバーする中空円筒型に形成され、かつ、上記感知器本体に対向する正面に透光部を有する感知器カバーと、上記感知器本体と感知器カバーとの勘合部にネジを設けることによって感知器カバーが感知器本体と螺合することを特徴とする。 The present invention has been made in order to solve the above-described problems, and is arranged so as to face a projector having a light emitting element and a light receiving element having a light receiving element, and project signal light from the projector to the light receiver. In the photoelectric separation type smoke detector that detects the occurrence of fire when smoke enters and the signal light projected on the light receiver is attenuated, the sensor main body having a disk type base and the above-mentioned detection A sensor cover that is formed in a hollow cylindrical shape that covers the sensor body and has a light transmitting portion on the front surface facing the sensor body, and a screw is provided at a fitting portion between the sensor body and the sensor cover. The sensor cover is screwed with the sensor body.

また、上記感知器本体に、第１の螺合支援手段である誘導リブを設けることによって、上記感知器カバーが容易に感知器本体と螺合できることを特徴とする。 In addition, the sensor cover can be easily screwed with the sensor body by providing the sensor body with guide ribs as first screwing support means.

また、上記感知器カバーに、第２の螺合支援手段である掛着フォークを設けることによって、上記感知器カバーが容易に感知器本体と螺合できることを特徴とする。 The sensor cover may be easily screwed with the sensor body by providing a hooking fork as second screwing support means on the sensor cover.

また、上記感知器カバーは透明な材料で形成されることにより、感知器の指示灯の視認性を確保する構造を特徴とする。 In addition, the sensor cover is formed of a transparent material, so that the visibility of the indicator light of the sensor is ensured.

本発明によれば、感知器本体と感知器カバーとをそれぞれ円筒型にし、両者にカバー取付け用のネジを設けることにより、感知器カバーを感知器本体に螺入するときに円周状に略均等な圧力を加え、カバーに歪みが生じることなく、カバーの密閉性を保つことができるとともに、ネジやボルト等ネジ止め用の部品点数が減らされ、機器のコストが低減できる。 According to the present invention, the sensor body and the sensor cover are each formed in a cylindrical shape, and a screw for attaching the cover is provided on both of them, so that when the sensor cover is screwed into the sensor body, it is substantially circular. A uniform pressure can be applied to keep the cover tight without distortion, and the number of screws and bolts and other parts for screwing can be reduced, thereby reducing the cost of the device.

また、感知器本体に予めに第１の螺合支援手段の誘導リブを設置し、感知器カバーを感知器本体に取付けるとき、感知器カバーのネジ部がこの誘導リブで感知器本体のネジ部と簡単に合わせられ、感知器カバーが正確に感知器本体に螺入される。一方、感知器カバーに予めに第２の螺合支援手段の掛着フォークを設置し、感知器カバーを感知器本体に取付けるとき、感知器カバーの掛着フォークが感知器本体を引っ掛けることができ、感知器カバーが大きくても容易に感知器本体に取付けられる。 In addition, when the guide rib of the first screwing support means is previously installed in the sensor body and the sensor cover is attached to the sensor body, the screw portion of the sensor cover is the screw portion of the sensor body. And the sensor cover is screwed into the sensor body accurately. On the other hand, when the hanging fork of the second screwing support means is installed in advance on the sensor cover and the sensor cover is attached to the sensor body, the hanging fork of the sensor cover can hook the sensor body. Even if the sensor cover is large, it can be easily attached to the sensor body.

また、上記感知器カバーは透明な材料を使用することにより、感知器の指示灯の視認性が確保され、また感知器カバーを着脱しても、感知器を外す必要がなく、光軸の再調整が不要となり、現場作業の労力が軽減できる。 The sensor cover is made of a transparent material to ensure the visibility of the indicator light of the sensor, and even if the sensor cover is attached or detached, there is no need to remove the sensor, and the optical axis can be restored. No adjustment is required, reducing the work on site.

この発明を実施するための実施形態１を図１から図５に示し、以下にその構成及び動作の手順を簡単に説明する。 A first embodiment for carrying out the present invention is shown in FIG. 1 to FIG. 5, and the configuration and operation procedure will be briefly described below.

実施形態１
図１は本発明に関わる光電式分離型煙感知器１００の側面図である。この光電式分離型煙感知器１００は、円筒型の感知器本体１と、中空円筒形の感知器カバー２と、壁面取付け金具３と、感知器の電源や動作状況を示す指示灯４とで構成されている。 Embodiment 1
FIG. 1 is a side view of a photoelectric separation type smoke sensor 100 according to the present invention. This photoelectric separation type smoke sensor 100 includes a cylindrical sensor body 1, a hollow cylindrical sensor cover 2, a wall mounting bracket 3, and an indicator lamp 4 indicating the power source and operation status of the sensor. It is configured.

感知器本体１は、投光器または受光器として発光素子または受光素子を内蔵している感知部１２と、感知部１２を保護し、中空円筒型を有する感知器本体カバー１１と、円盤型の感知器本体ベース１３とを有して、感知器本体カバー１１と感知器本体ベース１３との外径が異なっている。なお、感知器本体カバー１１の上に誘導リブ１４を設け、感知器本体ベース１３の上に固定用リブ１５と、ネジ部Ｋ１とを設けている（図４）。 The sensor body 1 includes a sensor unit 12 incorporating a light emitting element or a light receiver as a projector or a light receiver, a sensor body cover 11 that protects the sensor unit 12 and has a hollow cylindrical shape, and a disk-type sensor. The sensor body cover 13 and the sensor body base 13 have different outer diameters. A guide rib 14 is provided on the sensor body cover 11, and a fixing rib 15 and a screw portion K1 are provided on the sensor body base 13 (FIG. 4).

また、感知器カバー２は、透明の材料、例えば透明無色のアクリルで作られ、掛着フォーク２５と、ネジ部Ｋ２を有している（図５）。ネジ部Ｋ２の根元に密閉用のパッキンＰが嵌着されている。 The sensor cover 2 is made of a transparent material, for example, transparent colorless acrylic, and has a hooking fork 25 and a threaded portion K2 (FIG. 5). Sealing packing P is fitted to the root of the threaded portion K2.

ネジ部Ｋ１とネジ部Ｋ２は、感知器本体と感知器カバーとの勘合部である。上記の誘導リブ１４は、第１の螺合支援手段として、感知器本体カバー１２の外周方向に例えば３箇所均等的に周設され、片端は斜めの形状になっており、最大外径は感知器カバー２の内径より若干小さい。一方、上記の掛着フォーク２５は、第２の螺合支援手段として、感知器カバー２のネジ部Ｋ２の先端部に、外周方向に例えば３箇所均等的に突設され、上記固定用リブ１５を引っ掛るように設計されている。 The screw part K1 and the screw part K2 are fitting parts between the sensor body and the sensor cover. The guide rib 14 is provided as a first screwing support means, for example, at three locations equally around the outer circumference of the sensor body cover 12, with one end having an oblique shape, and the maximum outer diameter being detected. Slightly smaller than the inner diameter of the vessel cover 2. On the other hand, the hooking fork 25 is provided as a second screwing support means at the tip end portion of the screw portion K2 of the sensor cover 2 so as to protrude evenly, for example, at three locations in the outer circumferential direction, and the fixing rib 15 Designed to hook up.

以下、図１の構成につき、感知器カバー２を感知器本体１に取付ける（螺合）際の動作手順を、図１ないし図３に基づいて簡単に説明する。 In the following, the operation procedure when the sensor cover 2 is attached (screwed) to the sensor body 1 will be briefly described with reference to FIGS.

まず、図１のように、感知器本体１を壁面取付け金具３で壁に取付けてから、感知器カバー２を感知器本体１に対向させてカバーするようにする。 First, as shown in FIG. 1, the sensor main body 1 is attached to the wall with the wall mounting bracket 3, and then the sensor cover 2 is opposed to the sensor main body 1 to cover it.

次に、図２に示すように、誘導リブ１４の片端が次第に大きくなる斜めの形状を有しているため、感知器カバー２を感知器本体１に近づけるとき、感知器カバー２はこのリブ１４の傾斜面１４ａに誘導され、遂にネジ部Ｋ１とネジ部Ｋ２とは互いに螺合可能な位置となる。すなわち感知器カバー２と感知器本体１が同軸状態の位置になっている。そしてそのとき、掛着フォーク２５が固定用リブ１５を引っ掛けるように設計されているので、掛着フォーク２５が固定用リブ１５を掛合することができ、その位置で、感知器カバー２が掛着フォーク２５による掛着力で感知器本体１に固定される。したがって、たとえ作業員が手を感知器カバー２から離れてもカバーが落ちることはない。そして作業員は感知器カバー２を回転させ、容易に螺合操作を開始することができる。 Next, as shown in FIG. 2, since one end of the guide rib 14 has an oblique shape that gradually increases, when the sensor cover 2 is brought close to the sensor main body 1, the sensor cover 2 is moved to the rib 14. The threaded portion K1 and the threaded portion K2 are finally in positions where they can be screwed together. That is, the sensor cover 2 and the sensor body 1 are in a coaxial state. At that time, since the hooking fork 25 is designed to hook the fixing rib 15, the hooking fork 25 can hook the fixing rib 15, and the sensor cover 2 is hooked at that position. It is fixed to the sensor body 1 by the hooking force of the fork 25. Therefore, even if an operator removes his / her hand from the sensor cover 2, the cover does not fall. Then, the operator can easily start the screwing operation by rotating the sensor cover 2.

最後に、図３のように感知器カバー２を回転して感知器本体１に螺入させ、パッキンＰを引き締めるところに停止すれば、感知器カバー２を感知器本体１に取付けることは完了する。 Finally, as shown in FIG. 3, the sensor cover 2 is rotated and screwed into the sensor body 1 and stopped when the packing P is tightened, so that the attachment of the sensor cover 2 to the sensor body 1 is completed. .

この実施形態１によって、感知器カバー２を感知器本体１に螺入するとき、誘導リブ１４は両者のネジの螺合位置を簡易に合わさせ、掛着フォーク２５は感知器カバー２を感知器本体１の上に簡単に仮止めができ、感知器カバー２の体積が大きくても螺入作業が非常に容易になる。また従来のように多数ネジやボルト等を使用してカバーを引き締める面倒な作業は不要となるので、たとえ高所作業をしても感知器カバー２の取付けは非常に簡便になる。また、感知器本体１と感知器カバー２とをそれぞれ円筒形状にし、両者が螺合するときにカバー２に歪みが生じることなく、カバー２の密閉性を保つことができる。さらに、感知器カバー２は透明の材料で作られており、感知器カバー２をそのまま感知器本体１に装着すれば、感知器の指示灯４の確認が影響されず、光軸の再調整も不要となり、現場作業の労力が大幅に軽減することができる。 According to the first embodiment, when the sensor cover 2 is screwed into the sensor main body 1, the guide rib 14 simply aligns the screwing positions of both screws, and the hanging fork 25 attaches the sensor cover 2 to the sensor. Temporary fixing can be easily performed on the main body 1, and the screwing operation becomes very easy even if the volume of the sensor cover 2 is large. Further, since the troublesome work of tightening the cover using a large number of screws, bolts or the like as in the prior art is not required, the sensor cover 2 can be attached easily even if the work is performed at a high place. In addition, the sensor body 1 and the sensor cover 2 are each formed in a cylindrical shape, and the cover 2 can be kept hermetically sealed without causing distortion in the cover 2 when they are screwed together. Furthermore, the sensor cover 2 is made of a transparent material. If the sensor cover 2 is attached to the sensor body 1 as it is, the confirmation of the indicator light 4 of the sensor is not affected, and the optical axis can be readjusted. It becomes unnecessary and the labor of field work can be greatly reduced.

上記実施形態１における光電式分離型煙感知器１００は、発光素子を有する投光器と受光素子を有する受光器と対向配置して投光器から受光器に信号光を投光し、両者の間に煙が侵入して受光器に投光される信号光減衰したときはこれによって火災の発生を検知するようにした光電式分離型煙感知器１００において、円盤型ベースを有する感知器本体１と、上記感知器本体をカバーする中空円筒型に形成され、かつ、上記感知器本体に対向する正面に透光部を有する感知器カバーと、上記感知器本体と感知器カバーとの勘合部にネジを設けることによって感知器カバー２が簡単に感知器本体１と螺合することができる。 The photoelectric separation type smoke detector 100 according to the first embodiment is arranged so as to face a light projector having a light emitting element and a light receiver having a light receiving element, and project signal light from the light projector to the light receiver. In the photoelectric separation-type smoke detector 100 that detects the occurrence of fire when the signal light that has entered and is projected onto the light receiver is attenuated, the sensor main body 1 having a disk-type base and the above-described detection A sensor cover that is formed in a hollow cylindrical shape that covers the sensor body and has a light transmitting portion on the front surface facing the sensor body, and a screw is provided at a fitting portion between the sensor body and the sensor cover. Thus, the sensor cover 2 can be easily screwed into the sensor body 1.

また、上記感知器本体１に、第１の螺合支援手段である誘導リブ１４を設けることによって、上記感知器カバー２が容易に感知器本体１と螺合できる。 Moreover, the sensor cover 2 can be easily screwed to the sensor body 1 by providing the sensor body 1 with the guide ribs 14 as the first screwing support means.

また、上記感知器カバー２に、第２の螺合支援手段である掛着フォーク２５を設けることによって、上記感知器カバー２が容易に感知器本体１と螺合できる。 Further, by providing the sensor cover 2 with a hooking fork 25 as second screwing support means, the sensor cover 2 can be easily screwed with the sensor body 1.

また、上記感知器カバー２は透明な材料を使用することにより、感知器の指示灯４の視認性を確保することができる。 Moreover, the visibility of the indicator lamp 4 of the sensor can be ensured by using a transparent material for the sensor cover 2.

ここで、感知器カバーを感知器本体に取付けるとき、ネジで螺合することを記載しているが、それに限りすることがなく、例えばネジの代わりに簡易的なフックを使用して、互いに勘合してもよい。 Here, it is described that when the sensor cover is attached to the sensor body, it is screwed with a screw. However, the present invention is not limited to this, and for example, a simple hook is used instead of a screw to fit each other. May be.

なお、上記螺合支援手段の誘導リブは感知器本体に設けることの代わりに、感知器カバーの内側に設けてもよい。 The guide rib of the screwing support means may be provided inside the sensor cover instead of being provided on the sensor body.

実施形態１に係わる光電式分離型感知器１００の側面図その１Side view of photoelectric separation type sensor 100 according to the first embodiment, part 1 実施形態１に係わる光電式分離型感知器１００の側面図その２Side view of photoelectric separation type sensor 100 according to the first embodiment, part 2 実施形態１に係わる光電式分離型感知器１００の側面図その３Side view of photoelectric separation type sensor 100 according to the first embodiment, part 3 感知器本体１の側面図Side view of the sensor body 1 感知器カバー２の側面図Side view of sensor cover 2

符号の説明Explanation of symbols

１感知器本体
１１感知器本体カバー
１２感知部
１３感知器本体ベース
１４誘導リブ
１５固定用リブ
２感知器カバー
２５掛着フォーク
３壁面取付け金具
４指示灯
Ｋネジ部
Ｐパッキン
１００光電式分離型煙感知器

DESCRIPTION OF SYMBOLS 1 Sensor main body 11 Sensor main body cover 12 Sensor part 13 Sensor main body base 14 Guide rib 15 Fixing rib 2 Sensor cover 25 Hanging fork 3 Wall mounting bracket 4 Indicator light K Screw part P Packing 100 Photoelectric separation type smoke sensor

Claims

発光素子を有する投光器と受光素子を有する受光器と対向配置して投光器から受光器に信号光を投光し、両者の間に煙が侵入して受光器に投光される信号光減衰したときはこれによって火災の発生を検知するようにした光電式分離型煙感知器において、
円盤型ベースを有する感知器本体と、
上記感知器本体をカバーする中空円筒型に形成され、かつ、上記感知器本体に対向する正面に透光部を有する感知器カバーと、
上記感知器本体と感知器カバーとの勘合部にネジを設けることによって感知器カバーが感知器本体と螺合することを特徴とする光電式分離型煙感知器。 When signal light is projected from the light projector to the light receiver in opposition to the light emitter having the light emitting element and the light receiver having the light receiving element, and when the signal light attenuates due to the intrusion of smoke between them Is a photoelectric separation type smoke detector that detects the occurrence of fire by this,
A sensor body having a disk-shaped base;
A sensor cover that is formed in a hollow cylindrical shape that covers the sensor body, and that has a light transmitting portion on the front surface facing the sensor body;
A photoelectric separation type smoke detector, wherein a screw is provided at a fitting portion between the sensor body and the sensor cover so that the sensor cover is screwed with the sensor body.

上記感知器本体に、誘導リブを設ける第１の螺合支援手段を有することを特徴とする請求項１記載の光電式分離型煙感知器。 2. The photoelectric separation type smoke sensor according to claim 1, further comprising first screwing support means for providing a guide rib in the sensor body.

上記感知器カバーに、持着フォークを設ける第２の螺合支援手段を有することを特徴とする請求項１または２記載の光電式分離型煙感知器。 3. The photoelectric separation type smoke sensor according to claim 1, further comprising a second screwing support means for providing a holding fork on the sensor cover.

上記感知器カバーは透明な材料で形成されることを特徴とする請求項１〜３の何れかに記載の光電式分離型煙感知器。

4. The photoelectric separation type smoke sensor according to claim 1, wherein the sensor cover is made of a transparent material.