WO2008065831A1 - Fire detector - Google Patents

Fire detector Download PDF

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Publication number
WO2008065831A1
WO2008065831A1 PCT/JP2007/070537 JP2007070537W WO2008065831A1 WO 2008065831 A1 WO2008065831 A1 WO 2008065831A1 JP 2007070537 W JP2007070537 W JP 2007070537W WO 2008065831 A1 WO2008065831 A1 WO 2008065831A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection head
speaker
cylinder
fire
fire detector
Prior art date
Application number
PCT/JP2007/070537
Other languages
French (fr)
Japanese (ja)
Inventor
Fumiyoshi Mukoyama
Koji Sakamoto
Yoshitake Shimada
Yasuyuki Kawano
Takeshi Wada
Tomohiro Yoshitsuru
Original Assignee
Panasonic Electric Works Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Panasonic Electric Works Co., Ltd. filed Critical Panasonic Electric Works Co., Ltd.
Priority to AU2007326662A priority Critical patent/AU2007326662B2/en
Priority to EP07830271.8A priority patent/EP2093730B1/en
Priority to ES07830271T priority patent/ES2425063T3/en
Publication of WO2008065831A1 publication Critical patent/WO2008065831A1/en

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/012—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using recorded signals, e.g. speech
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles

Definitions

  • the present invention relates to a fire detector that is installed in a room of a building and detects a smoke or heat to give a fire warning.
  • a conventional fire detector installed in a room has a detection head fixed to a base fixed to the ceiling, and the detection head is smoke generated in the room. The fire is judged by smoke concentration.
  • This detection head is surrounded by an insect screen cylinder to prevent foreign objects such as insects from entering the detection head and maintain accurate fire detection.
  • This type of fire detector is configured to send a fire warning signal to an external device when it determines that a fire has occurred.
  • a fire detector includes a base attached to a room of a building, a detection head that is held by the base and detects a fire condition, and an insect net that covers the detection head.
  • the detection head is equipped with a sensor that detects smoke and heat when exposed to indoor air.
  • the insect net tube surrounds the detection head and is connected to the detection head or base at the upper end thereof and holds the speaker at the lower end portion.
  • the base is provided with a circuit board, which processes the output from the sensor and generates a fire warning sound when the output satisfies a predetermined fire judgment condition.
  • the electronic components that constitute the warning sound generating circuit to be output from are mounted on the circuit board.
  • the speaker uses an insect screen tube and is attached to the detection head together with the insect screen tube. By attaching it, it can be placed underneath the detection head, and it can be used with the force of passing a fire warning voice message into the room.
  • the insect repellent net cylinder is open at both upper and lower ends, and the inside is partitioned into an upper cylinder and a lower cylinder by a partition wall.
  • the speaker is accommodated in the lower cylinder, the upper cylinder overlaps with the periphery of the detection head, and indoor air is introduced into the detection head through a mesh hole formed in the peripheral wall.
  • the detection head is configured as a cylindrical body having a large number of slits for introducing smoke generated in the room.
  • the detection head receives a light source and light from the light source, and the presence of smoke.
  • the above-described sensor configured to detect a change in received light intensity is accommodated.
  • the opening at the lower end of the detection head is closed by the partition wall of the insect screen cylinder.
  • the insect-repellent net tube is equipped with a function to prevent light from entering from the lower end of the detection head and a function to maintain the sound power, thereby reducing the number of parts constituting the fire detector. be able to.
  • the partition wall of the insect-proof net tube is provided with a plurality of pores communicating with the inside of the detection head, and the rear surface of the speaker is opened to the outside through the detection head. It is preferable. In this case, since the back surface of the speaker covers these pores, light is prevented from entering the detection head through the pores.
  • air holes are formed in the wall surface of the lower cylinder of the insect-proof net cylinder. In this case, the pressure generated on the back surface of the speaker diaphragm can be released by the air holes.
  • a partition wall can be used as an insect screen cylinder.
  • the lower end opening of the detection head can be closed by the speaker held at the lower end portion of the insect net tube.
  • the upper cylinder of the insect-proof net cylinder can be formed into a tapered shape that decreases in diameter as it goes downward.
  • the insect-proof net cylinder includes a plurality of circumferential bars that run in the circumferential direction of the upper cylinder and a plurality of vertical bars that intersect with the circumferential bars to form a lattice.
  • the hole is configured to open radially outward and downward in the axial direction of the insect screen cylinder. According to this configuration, a foreign matter such as an insect adhering to the lattice of the insect-proof net tube can be dropped downward by gravity or vibration of the speaker, and enters the detection head. The ability to prevent S
  • the fire detector of the present invention preferably includes a head cover that surrounds the insect screen and covers the speaker.
  • the head cover has an upper end opened and a lower end closed, and is detachably coupled to the base at the upper end.
  • the sensor is exposed to room air through an opening window formed in the peripheral surface of the head cover, and a sound hole is formed in the bottom surface of the head cover to emit sound from the sound force. For this reason, the insect screen cylinder and the speaker can be hidden in the head cover, and the appearance of the fire detector can be improved.
  • FIG. 1 is a perspective view of a fire detector according to an embodiment of the present invention.
  • FIG. 2 Front sectional view of the above fire detector.
  • FIG. 3 An exploded perspective view of the fire detector.
  • FIG. 4 is a bottom view showing the detection head of the fire detector.
  • FIG. 5 is a perspective view showing an insect net tube used for the fire detector.
  • FIG. 6 is a cross-sectional view showing the same insect repellent net.
  • FIG. 7 An exploded perspective view of the main part of the fire detector.
  • FIG. 9 An exploded cross-sectional view of the main part of the fire detector.
  • FIG. 10 is an exploded perspective view showing a modification of the insect screen cylinder used in the above-described fire detector.
  • FIG. 11 is a partially enlarged perspective view showing a part of the same insect-proof net tube.
  • a fire detector according to an embodiment of the present invention will be described with reference to FIGS.
  • This fire detector is designed to judge fire based on the smoke concentration generated in the room, and a detection head 30 for detecting the smoke concentration is provided on the base 10 fixed to the ceiling surface of the room.
  • the fire detector is provided with an insect repellent tube 50 covering the periphery of the detection head 30, a head cover 60 covering the periphery of the insect repellent mesh tube 50, and a base cover 20 covering the base 10 outside the head cover 60.
  • a speaker 80 for informing a sound signal of a fire warning is held at the lower end of 50.
  • the base 10 has a first base 11 fixed to the building construction surface and a detection head 30 fixed.
  • the second base 12 is connected to each other by screws and integrated.
  • a circuit board 14 on which electronic components constituting a circuit for performing a fire determination is mounted is fixed.
  • the detection head 30 is a cylindrical body having a plurality of slits 32 on the peripheral wall, and the upper end thereof is fixed to the circuit board 14. As shown in FIG. 4, a plurality of bent fins 31 are arranged along the circumferential direction on the peripheral wall of the detection head 30, and slits are formed between the fins. The fin 31 is configured so as to prevent the air S from entering from the outside through the slit 32 and the penetration of light.
  • the LED 34 mounted on the circuit board 14 and the photodiode (PD) 35 that receives the LED light project into the internal space of the detection head 30, and light dispersed by smoke introduced into the detection head 30. Detected by the photodiode 35, the smoke concentration is determined by the intensity of the light.
  • This smoke concentration is detected by a detection circuit realized by the IC chip 15 mounted on the circuit board 14, and a fire warning signal is output when the smoke concentration exceeds a predetermined threshold value. Based on this fire warning signal, the sound generation circuit realized in this way generates a fire warning message and outputs sound from the speaker 80.
  • the second base 12 holds an LED 34, a photodiode 36, and a battery 18 that supplies power to the IC chip 15.
  • the IC chip 15 further monitors the capacity of the battery 18 to form a circuit for generating a voice battery warning signal when the battery capacity falls below a predetermined value. Is output.
  • the insect repellent net cylinder 50 is formed in a cylindrical shape with both upper and lower ends opened by a synthetic resin, and an upper cylinder 51 and a lower cylinder 52 are formed by a partition wall 55 formed inside. It is divided into A projection 53 is formed on the upper end of the upper cylinder 51, and this projection fits into a catch 33 provided on the outer periphery of the detection head 30, and the insect net 50 is detachably coupled to the detection head 30, and the upper cylinder 51 Covers the lower end of the detection head 30.
  • a large number of mesh holes 54 communicating with the slits 32 of the detection head 30 are formed in the peripheral wall of the upper cylinder 51, and indoor air travels into the internal space of the detection head 30 via the mesh holes 54.
  • the lower cylinder 52 has a structure for accommodating the speaker 80.
  • a voice coil case protruding from the back of the speaker 80 is fixedly fitted in a mounting recess 74 formed at the center of the partition wall 55, and a circular frame 82 surrounding the outer periphery of the speaker force 80 is fixed to the inner wall of the lower cylinder 52.
  • the Partition wall 55 In this case, a plurality of pores 58 communicating with the space in the detection head 30 are formed, and the speaker 80 is opened to the outside through the detection head 30 to increase the efficiency.
  • projections 56 and 57 projecting into the detection head 30 are formed on the partition wall 55, and each projection is combined with the LED base 36 and the PD base 37 of the detection head 30 to emit light from the LED.
  • a light guide and a light mask received by the PD are constructed. That is, the protrusions 56 and 57 complete the optical structure that detects smoke in the detection head 30 in cooperation with members in the detection head 30.
  • An air hole 59 that opens to the back side of the speaker 80 is formed in the peripheral wall of the lower cylinder 52 so that the sound pressure generated on the back side of the speaker 80 is released to the outside together with the pores 58 described above.
  • a lead wire (not shown) extending from the speaker 80 passes through a part of the pore 58 and is electrically connected to the circuit board 14 to output a fire warning message or a battery exhaustion warning generated by the sound generation circuit. To do.
  • the head cover 60 is a cylindrical body that covers the insect-repellent net tube 50.
  • the upper end of the head cover 60 is detachably coupled to the periphery of the central opening 22 of the base cover 20 that covers the lower surface of the base 10. Hide.
  • a plurality of sound holes 64 are formed in the bottom wall of the head cover 60, and the sound output of the speaker is emitted into the room through the sound holes 64.
  • An opening window 64 is formed in the peripheral wall of the head cover 60, and the opening window 64 is formed in the slit 32 of the detection head 30 and the air hole 59 of the lower cylinder 52 through the net hole 54 of the upper cylinder 51 of the insect-proof net cylinder 50. Are communicating.
  • a force is shown in which an outer periphery of the speaker 80 is fixed to the insect net 50 so that a gap is provided between the outer wall of the insect net 50 and the inner wall of the insect net 50.
  • a circular frame surrounding the frame may be brought into close contact with the inner wall of the lower cylinder 52 of the insect repellent cylinder 50.
  • FIG. 10 shows a modification of the insect screen cylinder applicable to the above embodiment. This insect net tube
  • 50A is a cylinder in which the insides of the upper cylinders 51A and 52A are partitioned by a partition wall 55A, and the upper cylinder 51A has a tapered shape that decreases in diameter as it goes downward.
  • the upper cylinder 51A includes a plurality of circumferential bars 71 that run in the circumferential direction and a plurality of vertical bars 72 that intersect with the circumferential bars to form a lattice, and a mesh hole 54A is formed between the lattices. Since the upper cylinder 51 has a tapered shape, as shown in FIG. 11, each net hole 54A opens in the radial direction and the axially lower side of the insect-proof net cylinder 50A.
  • insects and dust adhering to the lattice By applying vibration to the insect-proof net cylinder 50A, it is possible to prevent the net hole 54A from being blocked by dropping downward. These insects and dust can be effectively removed from the insect-repellent net tube 50A by a force that can be expected to fall even by gravity.
  • the speaker 80 it is preferable to use the speaker 80 to vibrate the insect-proof net tube 50A by sound generated by the speaker. In this case, in order for the sound pressure generated on the back surface of the speaker 80 to act on the partition wall 55A, it is preferable not to provide a hole communicating with the detection head in the partition wall 55A as shown in FIG.
  • an electric circuit force that periodically outputs an appropriate sound from the speaker can be provided separately from the above sound generation circuit.
  • the sound can be outside the audible range.
  • the peripheral wall of the lower cylinder 52A is provided with an air hole 59A that opens to the back of the speaker 80, so that the speaker power can be made open.
  • an air hole 59A can be eliminated to provide a sealed speaker structure.
  • the speaker 80 is held by the circular frame 82, and the speaker 80 is held by the insect screen cylinder 50A by closely fitting the circular frame 82 into the lower cylinder.
  • the circular frame 82 includes a cover 84 that covers the diaphragm of the speaker 80, and a sound hole 86 is formed in the cover 84.

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  • Business, Economics & Management (AREA)
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  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
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  • Fire-Detection Mechanisms (AREA)

Abstract

A fire detector equipped with a built-in speaker capable of generating voice fire warning. The speaker is held by an insect net tube covering a detection head for detecting fire conditions. Due to the fitting of the speaker together with the insect net tube to the detection head, the speaker can be disposed inferior to the detection head so as to attain reaching of voice message of fire warning throughout the room.

Description

明 細 書  Specification
火災感知器  Fire detector
技術分野  Technical field
[0001] 本発明は、建物の室内に設置され煙や熱などを検知して火災警告を与える火災感 知器に関するものである。  [0001] The present invention relates to a fire detector that is installed in a room of a building and detects a smoke or heat to give a fire warning.
背景技術  Background art
[0002] 従来の室内に設置される火災感知器は、 日本特許公開公報 11一 16064号に示さ れるように、天井に固定されるベースに検知ヘッドが固定され、検知ヘッドは室内で 発生する煙を取り込んで、煙濃度によって火災の判定を行うものである。この検知へ ッドは防虫網筒で包囲され、虫などの異物が検知ヘッド内に侵入するのを防ぎ、正確 な火災判定を維持している。この種の火災感知器は、火災の発生を判定したときに、 火災警告信号を外部の装置に送信するように構成される。  [0002] As shown in Japanese Patent Publication No. 11-16064, a conventional fire detector installed in a room has a detection head fixed to a base fixed to the ceiling, and the detection head is smoke generated in the room. The fire is judged by smoke concentration. This detection head is surrounded by an insect screen cylinder to prevent foreign objects such as insects from entering the detection head and maintain accurate fire detection. This type of fire detector is configured to send a fire warning signal to an external device when it determines that a fire has occurred.
[0003] 近来、火災の発生時には、居住者に対して、ブザーなどの紛らわしい音ではなぐ 火災の発生を音声によって正確に知らせることが要求され、音声による火災警告を 与えるためのスピーカを追加することが要望されており、特に、火災感知器自体にス ピー力を内蔵することが望まれて!/、る。  [0003] Recently, in the event of a fire, it is required to inform the occupant of the occurrence of a fire accurately by sound, rather than by a confusing sound such as a buzzer. Add a speaker to give a sound fire warning. In particular, it is desirable to have a built-in speaker in the fire detector itself!
発明の開示  Disclosure of the invention
[0004] 本発明は、上記の課題を解決するためになされたものであり、火災警告を音声で発 生させるスピーカを内蔵した火災感知器を提供する。本発明に係る火災感知器は、 建物の室内に取り付けられるベースと、ベースに保持されて火災の条件を検知する 検知ヘッドと、検知ヘッドを覆う防虫網筒とを備える。検知ヘッドは、室内の空気に晒 されて煙や熱を検知するセンサを備える。防虫網筒は検知ヘッドを包囲し、その上端 で上記検知ヘッド或いはベースへ結合され、下端部にスピーカを保持する。ベース には回路基板が設けられ、上記センサからの出力を処理して、この出力が所定の火 災判定条件を満たした時に、火災警告音を発生させて、この火災警告音を上記スピ 一力から出力させる警告音発生回路を構成する電子部品が上記回路基板に実装さ れる。このように、スピーカは防虫網筒を利用して、防虫網筒と共に検知ヘッドに取り 付けられることで、検知ヘッドの下方に配置でき、火災警告の音声メッセージを室内 へ fiさ渡らせること力でさる。 [0004] The present invention has been made to solve the above problems, and provides a fire detector with a built-in speaker for generating a fire warning by voice. A fire detector according to the present invention includes a base attached to a room of a building, a detection head that is held by the base and detects a fire condition, and an insect net that covers the detection head. The detection head is equipped with a sensor that detects smoke and heat when exposed to indoor air. The insect net tube surrounds the detection head and is connected to the detection head or base at the upper end thereof and holds the speaker at the lower end portion. The base is provided with a circuit board, which processes the output from the sensor and generates a fire warning sound when the output satisfies a predetermined fire judgment condition. The electronic components that constitute the warning sound generating circuit to be output from are mounted on the circuit board. In this way, the speaker uses an insect screen tube and is attached to the detection head together with the insect screen tube. By attaching it, it can be placed underneath the detection head, and it can be used with the force of passing a fire warning voice message into the room.
[0005] 上記防虫網筒は上下両端が開口し内部が仕切り壁によって上筒と下筒とに区画さ れることが好ましい。この場合、下筒には上記スピーカが収容され、上記の上筒が検 知ヘッドの周囲に重複し、周壁に形成した網穴を介して室内の空気を検知ヘッドへ 導入する。 [0005] It is preferable that the insect repellent net cylinder is open at both upper and lower ends, and the inside is partitioned into an upper cylinder and a lower cylinder by a partition wall. In this case, the speaker is accommodated in the lower cylinder, the upper cylinder overlaps with the periphery of the detection head, and indoor air is introduced into the detection head through a mesh hole formed in the peripheral wall.
[0006] 上記検知ヘッドは、室内で発生する煙を導入するための多数のスリットを有する筒 体として構成され、検知ヘッド内には光源と、この光源からの光を受光して煙の存在 による受光強度の変化を検知するように構成された上記のセンサが収容される。検知 ヘッドの下端の開口は上記防虫網筒の仕切り壁によって閉じられる。このため、防虫 網筒は、防虫機能に加えて、検知ヘッドの下端からの光の侵入を防止する機能と、ス ピー力を保持する機能備えられ、火災感知器を構成する部品点数を少なくすることが できる。  [0006] The detection head is configured as a cylindrical body having a large number of slits for introducing smoke generated in the room. The detection head receives a light source and light from the light source, and the presence of smoke. The above-described sensor configured to detect a change in received light intensity is accommodated. The opening at the lower end of the detection head is closed by the partition wall of the insect screen cylinder. For this reason, in addition to the insect-repellent function, the insect-repellent net tube is equipped with a function to prevent light from entering from the lower end of the detection head and a function to maintain the sound power, thereby reducing the number of parts constituting the fire detector. be able to.
[0007] スピーカを開放型として効率を向上させるために、防虫網筒の仕切り壁には、検知 ヘッド内に連通する複数の細孔が設けられて、スピーカの背面が検知ヘッドを通して 外部に開放することが好ましい。この場合、スピーカの背面がこれらの細孔を覆うため に、光が細孔を通して検知ヘッド内に侵入することが防止される。  [0007] In order to improve efficiency by using the speaker as an open type, the partition wall of the insect-proof net tube is provided with a plurality of pores communicating with the inside of the detection head, and the rear surface of the speaker is opened to the outside through the detection head. It is preferable. In this case, since the back surface of the speaker covers these pores, light is prevented from entering the detection head through the pores.
[0008] 防虫網筒の下筒の壁面には空気孔が形成されることも好ましい。この場合は、空気 孔によってスピーカの振動板の背面に発生する圧力を逃すことができる。  [0008] It is also preferable that air holes are formed in the wall surface of the lower cylinder of the insect-proof net cylinder. In this case, the pressure generated on the back surface of the speaker diaphragm can be released by the air holes.
[0009] また、防虫網筒として仕切り壁がな!/、ものを使用することもできる。この場合は、防 虫網筒の下端部に保持されるスピーカによって検知ヘッドの下端開口を塞ぐことがで きる。  [0009] In addition, a partition wall can be used as an insect screen cylinder. In this case, the lower end opening of the detection head can be closed by the speaker held at the lower end portion of the insect net tube.
[0010] 防虫網筒の上筒は、その直径が下方に行くほど小さくなつたテーパ形状とすること ができる。この場合、防虫網筒は上記の上筒の周方向に走る複数の周方向桟と、こ の周方向桟と交差して格子を形成する複数の縦桟とを備え、この格子間にできる網 穴が上記防虫網筒の半径方向外方と軸方向の下方とに開口するように構成すること が好ましい。この構成によれば、防虫網筒の格子に付着する虫などの異物を、重力 或いはスピーカの振動により、下方へ落下させることができ、検知ヘッド内へ侵入す ること力 S防止でさる。 [0010] The upper cylinder of the insect-proof net cylinder can be formed into a tapered shape that decreases in diameter as it goes downward. In this case, the insect-proof net cylinder includes a plurality of circumferential bars that run in the circumferential direction of the upper cylinder and a plurality of vertical bars that intersect with the circumferential bars to form a lattice. It is preferable that the hole is configured to open radially outward and downward in the axial direction of the insect screen cylinder. According to this configuration, a foreign matter such as an insect adhering to the lattice of the insect-proof net tube can be dropped downward by gravity or vibration of the speaker, and enters the detection head. The ability to prevent S
[0011] 本発明の火災感知器には、防虫網を包囲すると共に上記スピーカを覆うヘッドカバ 一が備えられることが好ましい。このヘッドカバー上端が開口して下端が閉塞する筒 体であり、上端で上記ベースへ着脱自在に結合される。ヘッドカバーの周面に形成 した開口窓を介して記センサが室内の空気に晒され、上記ヘッドカバーの底面にス ピー力からの音を放出する音穴が形成される。このため、防虫網筒およびスピーカを ヘッドカバー内に隠し、火災感知器の外観を向上させることができる。  [0011] The fire detector of the present invention preferably includes a head cover that surrounds the insect screen and covers the speaker. The head cover has an upper end opened and a lower end closed, and is detachably coupled to the base at the upper end. The sensor is exposed to room air through an opening window formed in the peripheral surface of the head cover, and a sound hole is formed in the bottom surface of the head cover to emit sound from the sound force. For this reason, the insect screen cylinder and the speaker can be hidden in the head cover, and the appearance of the fire detector can be improved.
図面の簡単な説明  Brief Description of Drawings
[0012] [図 1]本発明の一実施形態に係る火災感知器の斜視図。  FIG. 1 is a perspective view of a fire detector according to an embodiment of the present invention.
[図 2]同上の火災感知器の正面断面図。  [Fig. 2] Front sectional view of the above fire detector.
[図 3]同上の火災感知器の分解斜視図。  [Fig. 3] An exploded perspective view of the fire detector.
[図 4]同上の火災感知器の検知ヘッドを示す下面図。  FIG. 4 is a bottom view showing the detection head of the fire detector.
[図 5]同上の火災感知器に使用する防虫網筒を示す斜視図。  FIG. 5 is a perspective view showing an insect net tube used for the fire detector.
[図 6]同上の防虫網筒を示す断面図。  FIG. 6 is a cross-sectional view showing the same insect repellent net.
[図 7]同上の火災感知器の要部分解斜視図。  [Fig. 7] An exploded perspective view of the main part of the fire detector.
[図 8]同上の火災感知器の要部分解正面図。  [Figure 8] Exploded front view of the main part of the above fire detector.
[図 9]同上の火災感知器の要部分解断面図。  [Fig. 9] An exploded cross-sectional view of the main part of the fire detector.
[図 10]同上の火災検知器に使用される防虫網筒の変更態様を示す分解斜視図。  FIG. 10 is an exploded perspective view showing a modification of the insect screen cylinder used in the above-described fire detector.
[図 11]同上の防虫網筒の一部を示す部分拡大斜視図。  FIG. 11 is a partially enlarged perspective view showing a part of the same insect-proof net tube.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 図 1〜9に基づいて、本発明の一実施形態に係る火災感知器を説明する。この火 災感知器は、室内に発生する煙の濃度に基づいて火災の判定を行うように設計され 、室内の天井面に固定されるベース 10に煙濃度を検知する検知ヘッド 30が設けら れる。火災感知器には、検知ヘッド 30の周囲を覆う防虫網筒 50、防虫網筒 50の周 囲を覆うヘッドカバー 60、及びヘッドカバー 60の外側でベース 10を覆うベースカバ 一 20が備えられ、防虫網筒 50の下端に火災警告の音声信号を報知するスピーカ 8 0が保持される。 [0013] A fire detector according to an embodiment of the present invention will be described with reference to FIGS. This fire detector is designed to judge fire based on the smoke concentration generated in the room, and a detection head 30 for detecting the smoke concentration is provided on the base 10 fixed to the ceiling surface of the room. . The fire detector is provided with an insect repellent tube 50 covering the periphery of the detection head 30, a head cover 60 covering the periphery of the insect repellent mesh tube 50, and a base cover 20 covering the base 10 outside the head cover 60. A speaker 80 for informing a sound signal of a fire warning is held at the lower end of 50.
[0014] ベース 10は、建物の造営面に固定される第 1ベース 11と、検知ヘッド 30が固定さ れる第 2ベース 12とで構成され、両者はねじにて結合されて一体化される。第 2ベー ス 12には、火災の判定を行うための回路を構成する電子部品が実装された回路基 板 14が固定される。 [0014] The base 10 has a first base 11 fixed to the building construction surface and a detection head 30 fixed. The second base 12 is connected to each other by screws and integrated. In the second base 12, a circuit board 14 on which electronic components constituting a circuit for performing a fire determination is mounted is fixed.
[0015] 検知ヘッド 30は、周壁に複数のスリット 32を備えた円筒体であり、その上端が回路 基板 14へ固定される。検知ヘッド 30の周壁には、図 4に示すように、複数の屈曲した フィン 31が周方向に沿って並び、フィン間にスリットが形成される。このフィン 31は、 外部からの空気がスリット 32を通して内部に導入される力 S、光の侵入を防ぐように、構 成される。検知ヘッド 30の内部空間には、回路基板 14に実装された LED34と、 LE Dの光を受光するフォトダイオード（PD) 35が突出し、検知ヘッド 30内に導入される 煙によって分散される光がフォトダイオード 35で検知され、その光の強度によって煙 の濃度が求められる。この煙濃度は、回路基板 14に実装された ICチップ 15にて実 現される検知回路で検知され、煙濃度が所定の閾値を超えたときに火災の警告信号 が出力され、同じく ICチップにて実現される音声発生回路はこの火災警告信号に基 づいて、火災警告メッセージを発生させてスピーカ 80から音声を出力させる。  The detection head 30 is a cylindrical body having a plurality of slits 32 on the peripheral wall, and the upper end thereof is fixed to the circuit board 14. As shown in FIG. 4, a plurality of bent fins 31 are arranged along the circumferential direction on the peripheral wall of the detection head 30, and slits are formed between the fins. The fin 31 is configured so as to prevent the air S from entering from the outside through the slit 32 and the penetration of light. The LED 34 mounted on the circuit board 14 and the photodiode (PD) 35 that receives the LED light project into the internal space of the detection head 30, and light dispersed by smoke introduced into the detection head 30. Detected by the photodiode 35, the smoke concentration is determined by the intensity of the light. This smoke concentration is detected by a detection circuit realized by the IC chip 15 mounted on the circuit board 14, and a fire warning signal is output when the smoke concentration exceeds a predetermined threshold value. Based on this fire warning signal, the sound generation circuit realized in this way generates a fire warning message and outputs sound from the speaker 80.
[0016] 第 2ベース 12には、 LED34、フォトダイオード 36、 ICチップ 15に電源を供給する 電池 18が保持される。 ICチップ 15は、更にこの電池 18の容量を監視して、電池容 量が所定値を下回ったときに、音声による電池警告信号を発生させる回路が形成さ れ、スピーカ 80からこの電池警告信号が出力される。  The second base 12 holds an LED 34, a photodiode 36, and a battery 18 that supplies power to the IC chip 15. The IC chip 15 further monitors the capacity of the battery 18 to form a circuit for generating a voice battery warning signal when the battery capacity falls below a predetermined value. Is output.
[0017] 防虫網筒 50は、図 5及び図 6に示すように、合成樹脂により上下の両端が開口した 円筒状に形成され、内部に形成した仕切り壁 55によって上筒 51と下筒 52とに区画さ れる。上筒 51の上端には突起 53が形成され、この突起が検知ヘッド 30の外周に設 けたキャッチ 33に嵌合して、防虫網筒 50が検知ヘッド 30へ着脱自在に結合され、上 筒 51が検知ヘッド 30の下端部の周囲を覆う。上筒 51の周壁には検知ヘッド 30のス リット 32に連通する多数の網孔 54が形成され、室内の空気が網孔 54を介して検知 ヘッド 30の内部空間に進む。  As shown in FIG. 5 and FIG. 6, the insect repellent net cylinder 50 is formed in a cylindrical shape with both upper and lower ends opened by a synthetic resin, and an upper cylinder 51 and a lower cylinder 52 are formed by a partition wall 55 formed inside. It is divided into A projection 53 is formed on the upper end of the upper cylinder 51, and this projection fits into a catch 33 provided on the outer periphery of the detection head 30, and the insect net 50 is detachably coupled to the detection head 30, and the upper cylinder 51 Covers the lower end of the detection head 30. A large number of mesh holes 54 communicating with the slits 32 of the detection head 30 are formed in the peripheral wall of the upper cylinder 51, and indoor air travels into the internal space of the detection head 30 via the mesh holes 54.
[0018] 下筒 52はスピーカ 80を収容する構造を備える。スピーカ 80の背面に突出するボイ スコイルケースが仕切り壁 55の中央に形成した取り付け凹所 74に固定嵌合され、ス ピー力 80の外周を囲む円形フレーム 82が下筒 52の内壁に固定される。仕切り壁 55 には、検知ヘッド 30内の空間に連通する複数の細孔 58が形成され、スピーカ 80の 背部が検知ヘッド 30を通して外部に開放されることでスピーカが開放型とされて効率 を高めている。また、仕切り壁 55には、検知ヘッド 30内に突出する突起 56、 57が形 成され、各突起が検知ヘッド 30の LED基台 36と PD基台 37とにそれぞれ組み合わ されて、 LEDから発光する光のガイドと PDで受光する光のマスクを構成する。即ち、 突起 56、 57は検知ヘッド 30内の部材と共同して検知ヘッド 30での煙を検出する光 学系構造体を完成させる。下筒 52の周壁にはスピーカ 80の背面側に開口する空気 孔 59が形成され、スピーカ 80を背面に発生する音圧を、上記の細孔 58と共に外部 に逃すようにしている。スピーカ 80から延出するリード線（図示せず）は、細孔 58の一 部を貫通して回路基板 14へ電気接続され、音声発生回路で発生される火災警告メ ッセージや電池切れ警告を出力する。 The lower cylinder 52 has a structure for accommodating the speaker 80. A voice coil case protruding from the back of the speaker 80 is fixedly fitted in a mounting recess 74 formed at the center of the partition wall 55, and a circular frame 82 surrounding the outer periphery of the speaker force 80 is fixed to the inner wall of the lower cylinder 52. The Partition wall 55 In this case, a plurality of pores 58 communicating with the space in the detection head 30 are formed, and the speaker 80 is opened to the outside through the detection head 30 to increase the efficiency. In addition, projections 56 and 57 projecting into the detection head 30 are formed on the partition wall 55, and each projection is combined with the LED base 36 and the PD base 37 of the detection head 30 to emit light from the LED. A light guide and a light mask received by the PD are constructed. That is, the protrusions 56 and 57 complete the optical structure that detects smoke in the detection head 30 in cooperation with members in the detection head 30. An air hole 59 that opens to the back side of the speaker 80 is formed in the peripheral wall of the lower cylinder 52 so that the sound pressure generated on the back side of the speaker 80 is released to the outside together with the pores 58 described above. A lead wire (not shown) extending from the speaker 80 passes through a part of the pore 58 and is electrically connected to the circuit board 14 to output a fire warning message or a battery exhaustion warning generated by the sound generation circuit. To do.
[0019] ヘッドカバー 60は防虫網筒 50を覆う円筒体であり、ベース 10の下面を覆うベース カバー 20の中央開口 22の周縁に上端部を着脱自在に結合されて、下端の底壁で スピーカ 80を隠す。ヘッドカバー 60の底壁には複数の音孔 64が形成され、この音孔 64を通してスピーカの音声出力が室内に放出される。ヘッドカバー 60の周壁には開 口窓 64が形成され、防虫網筒 50の上筒 51の網孔 54を介して検知ヘッド 30のスリツ ト 32及び、下筒 52の空気孔 59にこの開口窓 64が連通している。  [0019] The head cover 60 is a cylindrical body that covers the insect-repellent net tube 50. The upper end of the head cover 60 is detachably coupled to the periphery of the central opening 22 of the base cover 20 that covers the lower surface of the base 10. Hide. A plurality of sound holes 64 are formed in the bottom wall of the head cover 60, and the sound output of the speaker is emitted into the room through the sound holes 64. An opening window 64 is formed in the peripheral wall of the head cover 60, and the opening window 64 is formed in the slit 32 of the detection head 30 and the air hole 59 of the lower cylinder 52 through the net hole 54 of the upper cylinder 51 of the insect-proof net cylinder 50. Are communicating.
[0020] 図示の実施形態では、スピーカ 80の外周が防虫網筒 50の内壁との間にギャップを 設けるようにして、スピーカ 80を防虫網筒 50へ固定した例を示した力 スピーカ 80の 外周を囲む円形フレームを防虫網筒 50の下筒 52の内壁に密接させるようにしてもよ い。  In the illustrated embodiment, a force is shown in which an outer periphery of the speaker 80 is fixed to the insect net 50 so that a gap is provided between the outer wall of the insect net 50 and the inner wall of the insect net 50. A circular frame surrounding the frame may be brought into close contact with the inner wall of the lower cylinder 52 of the insect repellent cylinder 50.
[0021] 図 10は上記の実施形態に適用できる防虫網筒の変更態様を示す。この防虫網筒  [0021] FIG. 10 shows a modification of the insect screen cylinder applicable to the above embodiment. This insect net tube
50Aは、先の実施形態と同様に、仕切り壁 55Aによって上筒 51Aと 52Aとの内部が 区画された円筒であり、上筒 51Aはその直径が下方に行くほど小さくなつたテーパ形 状とされる。上筒 51Aは周方向に走る複数の周方向桟 71と、この周方向桟と交差し て格子を形成する複数の縦桟 72とを備え、この格子間に網穴 54Aを形成している。 上筒 51がテーパ形状とされていることで、図 11に示すように、各網孔 54Aが防虫網 筒 50Aの半径方向と軸方向の下方とに開口する。このため、格子に付着する虫や埃 は、防虫網筒 50Aに振動を与えることで、下方に落下して網孔 54Aが塞がれるのを 防止できる。これらの虫や埃は、重力によっても落下することが期待できる力 外部か らの振動によって防虫網筒 50Aから効果的に取り除くことができる。特に、スピーカ 8 0を利用してスピーカで発生する音により防虫網筒 50Aを振動させることが好ましい。 この場合は、スピーカ 80の背面に発生する音圧が仕切り壁 55Aに作用させるために 、図 10に示すように、仕切り壁 55Aには検知ヘッド内に連通する穴を設けないことが 好ましい。この防虫網筒 50Aの掃除が定期的に行われるように、定期的に適宜の音 をスピーカから出力させるような電気回路力 上記音声発生回路とは別に設けること ができ、この場合の音は、音声以外に、可聴領域外の音とすることができる。図示の ように、下筒 52Aの周壁にはスピーカ 80の背面に開口する空気孔 59Aを設けて、ス ピー力を開放型とすることができる力 防虫網筒 50Aへ効果的に振動を与えるため には、空気穴 59Aを無くして密閉型のスピーカ構造とすることができる。 Similarly to the previous embodiment, 50A is a cylinder in which the insides of the upper cylinders 51A and 52A are partitioned by a partition wall 55A, and the upper cylinder 51A has a tapered shape that decreases in diameter as it goes downward. The The upper cylinder 51A includes a plurality of circumferential bars 71 that run in the circumferential direction and a plurality of vertical bars 72 that intersect with the circumferential bars to form a lattice, and a mesh hole 54A is formed between the lattices. Since the upper cylinder 51 has a tapered shape, as shown in FIG. 11, each net hole 54A opens in the radial direction and the axially lower side of the insect-proof net cylinder 50A. For this reason, insects and dust adhering to the lattice By applying vibration to the insect-proof net cylinder 50A, it is possible to prevent the net hole 54A from being blocked by dropping downward. These insects and dust can be effectively removed from the insect-repellent net tube 50A by a force that can be expected to fall even by gravity. In particular, it is preferable to use the speaker 80 to vibrate the insect-proof net tube 50A by sound generated by the speaker. In this case, in order for the sound pressure generated on the back surface of the speaker 80 to act on the partition wall 55A, it is preferable not to provide a hole communicating with the detection head in the partition wall 55A as shown in FIG. In order to periodically clean the insect net 50A, an electric circuit force that periodically outputs an appropriate sound from the speaker can be provided separately from the above sound generation circuit. In addition to voice, the sound can be outside the audible range. As shown in the figure, the peripheral wall of the lower cylinder 52A is provided with an air hole 59A that opens to the back of the speaker 80, so that the speaker power can be made open. In this case, an air hole 59A can be eliminated to provide a sealed speaker structure.
この変更態様においては、スピーカ 80は円形フレーム 82に保持され、円形フレー ム 82を下筒内に密に嵌合させることで、スピーカ 80が防虫網筒 50Aに保持される。 円形フレーム 82はスピーカ 80の振動板を覆うカバー 84を備え、このカバー 84に音 穴 86が形成される。  In this modified embodiment, the speaker 80 is held by the circular frame 82, and the speaker 80 is held by the insect screen cylinder 50A by closely fitting the circular frame 82 into the lower cylinder. The circular frame 82 includes a cover 84 that covers the diaphragm of the speaker 80, and a sound hole 86 is formed in the cover 84.

Claims

請求の範囲 The scope of the claims
[1] 建物の室内に取り付けられるベースと、 [1] A base that can be installed in a building room,
上記ベースに保持されて火災の条件を検知する検知ヘッドと、  A detection head held on the base to detect fire conditions;
検知ヘッドを覆う防虫網筒と、  An insect repellent tube covering the detection head;
を備えた火災感知器であって、  A fire detector with
上記検知ヘッドは、室内の空気に晒されて煙や熱を検知するセンサを備え、 上記防虫網筒が上記検知ヘッドを包囲し、その上端で上記検知ヘッドまたは上記べ ースに結合され、下端部にスピーカを保持する、  The detection head includes a sensor that detects smoke and heat when exposed to indoor air, the insect net tube surrounds the detection head, and is coupled to the detection head or the base at an upper end thereof, and has a lower end. Hold the speaker in the
上記ベースに回路基板が設けられ、上記センサからの出力を処理して、この出力が 所定の火災判定条件を満たした時に、火災警告音を発生させて、この火災警告音を 上記スピーカから出力させる警告音発生回路を構成する電子部品が上記回路基板 に実装されたことを特徴とする火災感知器。  A circuit board is provided on the base, and the output from the sensor is processed. When the output satisfies a predetermined fire judgment condition, a fire warning sound is generated and the fire warning sound is output from the speaker. A fire detector, wherein electronic components constituting a warning sound generating circuit are mounted on the circuit board.
[2] 上記防虫網筒は上下両端が開口し内部が仕切り壁によって上筒と下筒とに区画され 上記上筒が上記検知ヘッドの周囲を覆い、上記の下筒に上記のスピーカが収容され 上記上筒の周壁に室内の空気を検知ヘッドへ導入する網穴が形成されことを特徴と する請求項 1に記載の火災感知器。  [2] The insect screen cylinder is opened at both upper and lower ends, and the inside is partitioned into an upper cylinder and a lower cylinder by a partition wall, the upper cylinder covers the periphery of the detection head, and the speaker is accommodated in the lower cylinder. 2. The fire detector according to claim 1, wherein a net hole for introducing indoor air into the detection head is formed in the peripheral wall of the upper cylinder.
[3] 上記検知ヘッドは、室内で発生する煙を導入するための多数のスリットを有する筒体 として構成され、上記センサは、検知ヘッド内に配置した光源からの光を受光して煙 の存在による受光強度の変化により煙濃度を検知するように構成され、 [3] The detection head is configured as a cylindrical body having a large number of slits for introducing smoke generated in the room, and the sensor receives light from a light source disposed in the detection head to detect the presence of smoke. It is configured to detect smoke density based on the change in received light intensity due to,
上記検知ヘッドの下端開口が下端の開口が上記仕切り壁によって閉じられたことを 特徴とする請求項 2に記載の火災感知器。  The fire detector according to claim 2, wherein the lower end opening of the detection head is closed by the partition wall.
[4] 上記仕切り壁に上記検知ヘッド内に連通する複数の細孔が形成され、この複数の細 孔が上記スピーカの背面で隠されて、細孔から光が上記検知ヘッド内に侵入するの を防止したことを特徴とする請求項 3に記載の火災感知器。 [4] A plurality of pores communicating with the inside of the detection head are formed in the partition wall, and the plurality of pores are hidden by the back surface of the speaker, so that light enters the detection head from the pores. The fire detector according to claim 3, wherein the fire detector is prevented.
[5] 上記下筒の壁面に空気孔が形成されたことを特徴とする請求項 2に記載の火災感知 [5] The fire detection according to claim 2, wherein an air hole is formed in a wall surface of the lower cylinder.
[6] 上記防虫網筒は上下の両端が開口する筒体であり、上記防虫網筒の下端部内に上 記スピーカが嵌め込まれて、上記防虫網筒にスピーカが保持されたことを特徴とする 請求項 1に記載の火災感知器。 [6] The insect screen cylinder is a cylinder body having upper and lower ends open, and the speaker is fitted in a lower end portion of the insect screen cylinder, and the speaker is held by the insect screen cylinder. The fire detector according to claim 1.
[7] 上記の防虫網筒の上記上筒は、その直径が下方に行くほど小さくなつたテーパ形状 となり、上記防虫網筒は上記の上筒の周方向に走る複数の周方向桟と、この周方向 桟と交差して格子を形成する複数の縦桟とを備え、この格子間にできる網穴が上記 防虫網筒の半径方向外方と軸方向の下方とに開口したことを特徴とする請求項 1に 記載の火災感知器。  [7] The upper tube of the insect screen cylinder has a tapered shape that decreases in diameter as it goes downward. The insect screen tube includes a plurality of circumferential bars that run in the circumferential direction of the upper tube, and A plurality of vertical beams that cross the circumferential beam and form a lattice, and a net hole formed between the lattices is opened radially outward and axially downward of the insect screen cylinder. The fire detector according to claim 1.
[8] 上記防虫網筒を包囲すると共に上記スピーカを覆うヘッドカバーが備えられ、上記べ ースは上端が開口して下端が閉塞する筒体であり、上端で上記ベースへ着脱自在 に結合され、上記ヘッドカバーの周面に形成した開口窓を介して記センサが室内の 空気に晒され、上記ヘッドカバーの底面にスピーカからの音を放出する音穴が形成 されたことを特徴とする請求項 1に記載の火災感知器。  [8] A head cover that surrounds the insect screen cylinder and covers the speaker is provided, and the base is a cylindrical body having an upper end opened and a lower end closed, and is detachably coupled to the base at the upper end. 2. The sensor according to claim 1, wherein the sensor is exposed to indoor air through an opening window formed on a peripheral surface of the head cover, and a sound hole for emitting sound from a speaker is formed on a bottom surface of the head cover. The fire detector described.
PCT/JP2007/070537 2006-11-29 2007-10-22 Fire detector WO2008065831A1 (en)

Priority Applications (3)

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AU2007326662A AU2007326662B2 (en) 2006-11-29 2007-10-22 Fire alarm
EP07830271.8A EP2093730B1 (en) 2006-11-29 2007-10-22 Fire detector
ES07830271T ES2425063T3 (en) 2006-11-29 2007-10-22 Fire detector

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ES2425063T3 (en) 2013-10-11
EP2093730A1 (en) 2009-08-26
EP2093730B1 (en) 2013-06-26
JP4432960B2 (en) 2010-03-17
AU2007326662A1 (en) 2008-06-05
JP2008134876A (en) 2008-06-12
EP2093730A4 (en) 2009-12-02
AU2007326662B2 (en) 2011-05-19

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