JPH0753049Y2 - Fiber unit - Google Patents
Fiber unitInfo
- Publication number
- JPH0753049Y2 JPH0753049Y2 JP1987072225U JP7222587U JPH0753049Y2 JP H0753049 Y2 JPH0753049 Y2 JP H0753049Y2 JP 1987072225 U JP1987072225 U JP 1987072225U JP 7222587 U JP7222587 U JP 7222587U JP H0753049 Y2 JPH0753049 Y2 JP H0753049Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- tube
- fiber unit
- optical sensor
- high temperature
- 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.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 ［考案の目的］ （産業上の利用分野） 本考案は、光ファイバを被う金属製の外被管の熱伝導を
抑制したファイバユニットに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a fiber unit in which heat conduction of a metal jacket tube covering an optical fiber is suppressed.
（従来の技術） 従来、被検出部位たる高温処理室内の物品の検出例えば
熱処理直後の食品容器の通過を確認する光センサに用い
られるファイバユニットは、耐寒，耐熱用の光ファイバ
を金属製の可撓管からなる外被管で被った構成で、その
先端部を前記高温処理室の壁部に固定し、基端部を光セ
ンサに接続している。(Prior Art) Conventionally, a fiber unit used for an optical sensor for detecting an article in a high-temperature processing chamber, which is a detected portion, for example, for confirming passage of a food container immediately after heat treatment, has a cold-resistant and heat-resistant optical fiber made of metal The outer tube is covered with a flexible tube, and its tip is fixed to the wall of the high temperature processing chamber and its base is connected to an optical sensor.
（考案が解決しようとする問題点） 上述のファイバユニットにおいては、外被管を外力に対
する強度上から金属製としているが、金属製の外被管は
熱伝導率が大であるので、高温処理室の熱が外被管を通
り光センサに伝達されて光センサの温度を上昇させるよ
うになり、光センサの動作特性が変化して検出精度が低
下するという問題がある。(Problems to be solved by the invention) In the above fiber unit, the outer jacket tube is made of metal in view of its strength against external force. However, since the outer jacket tube made of metal has a large thermal conductivity, high temperature treatment is required. The heat of the chamber is transmitted to the optical sensor through the envelope tube to raise the temperature of the optical sensor, which causes a change in the operating characteristics of the optical sensor, which lowers the detection accuracy.
そこで本考案の目的は、外被管の熱伝導を抑制し得、こ
の場合でも外力に対する強度を充分に確保し得るファイ
バユニットを提供するにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fiber unit that can suppress heat conduction of a jacket tube and can secure sufficient strength against external force even in this case.
［考案の構成］ （問題点を解決するための手段） 本考案のファイバユニットは、耐熱性の光ファイバの先
端部を高温あるいは低温の被検出部位に配置すると共に
基端部を電子部品を搭載した検出器に接続して使用する
ものにおいて、前記光ファイバを可撓性を有する金属製
の外被管により被い、この外被管の一部に熱伝導率の低
い材料からなる熱伝導抑制管を用いた構成としたところ
に特徴を有する。[Structure of the Invention] (Means for Solving the Problems) In the fiber unit of the present invention, the tip end of the heat-resistant optical fiber is arranged at a high or low temperature detection site, and the base end is mounted with electronic parts. When used in connection with a detector, the optical fiber is covered with a flexible metallic jacket tube, and a part of the jacket tube is made of a material having low thermal conductivity to suppress heat conduction. It is characterized by the configuration using a tube.
（作用） 本考案のファイバユニットは、外被管の一部の熱伝導抑
制管が熱伝導を抑制し、外被管の残りの金属製部分が外
力に対する強度を確保する。(Operation) In the fiber unit of the present invention, the heat conduction suppressing tube of a part of the jacket tube suppresses heat conduction, and the remaining metal portion of the jacket tube secures strength against external force.
（実施例） 以下、本考案を透過形光センサに適用した一実施例につ
き図面を参照して説明する。(Embodiment) An embodiment in which the present invention is applied to a transmission type optical sensor will be described below with reference to the drawings.
第１図において、１はファイバユニットで、これは耐
寒，耐熱性の光ファイバ（例えば石英ガラスの多芯構
造）２の外周を外被管３により被って構成されている。
この外被管３は、可撓性を有する金属製の第１の管体５
と、可撓性を有する金属製の第２の管体６と、これらの
間に位置し熱伝導率の低い材料例えばシリコンゴムから
形成された熱伝導抑制管７とから構成されており、熱伝
導抑制管７はコネクタ8,8により管体5,6に連結されてい
る。この場合、第１の管体５の長さ寸法は第２の管体６
及び熱伝導抑制管７のそれよりも充分に大となるように
設定されている。そして、管体５及び６の部分の光ファ
イバ２はシリコンチューブ等で被覆されている。In FIG. 1, reference numeral 1 denotes a fiber unit, which is constructed by covering an outer circumference of a cold-resistant and heat-resistant optical fiber (for example, a multi-core structure of quartz glass) 2 with a jacket tube 3.
The jacket tube 3 is a flexible first tube body 5 made of metal.
And a second metal pipe body 6 having flexibility, and a heat conduction suppressing pipe 7 formed between the second metal pipe body 6 and a material having a low heat conductivity, such as silicon rubber. The conduction suppressing pipe 7 is connected to the pipe bodies 5 and 6 by the connectors 8 and 8. In this case, the length dimension of the first pipe body 5 is the same as that of the second pipe body 6.
And is set to be sufficiently larger than that of the heat conduction suppressing tube 7. The optical fiber 2 in the tube bodies 5 and 6 is covered with a silicon tube or the like.
さて、第２図に示すように、２本のファイバユニット1,
1は、管体5,5の右端部側が検出器たる透過形光センサ９
に接続され、管体6,6側の先端部が夫々対向するように
被検出部位たる高温処理室10内の挿入されて夫々の基部
が高温処理室10の壁部に固定されている。而して、光セ
ンサ９の投光素子から一方のファイバユニット１の光フ
ァイバ２の基端部に投光されると、その光は高温処理室
10内において光ファイバ２の先端部から他方のファイバ
ユニット１の光ファイバ２の先端部に投光され、その光
は光ファイバ２の基端部から光センサ９の受光素子によ
って受光される。従って、高温処理室10内においてファ
イバユニット1,1の先端部間に物品が位置すると、この
物品により光が遮断されて光センサ９の受光信号が変化
するようになり、以て、物品の検出が行なわれる。Now, as shown in FIG. 2, two fiber units 1,
1 is a transmission type optical sensor 9 in which the right ends of the tubular bodies 5 and 5 are detectors.
, And the respective bases are fixed to the wall portion of the high temperature processing chamber 10 by being inserted into the high temperature processing chamber 10 which is a detected portion so that the tips of the pipes 6 and 6 face each other. Then, when the light is emitted from the light emitting element of the optical sensor 9 to the base end of the optical fiber 2 of the one fiber unit 1, the light is emitted from the high temperature processing chamber.
Within 10 the light is projected from the tip of the optical fiber 2 to the tip of the optical fiber 2 of the other fiber unit 1, and the light is received by the light receiving element of the optical sensor 9 from the base of the optical fiber 2. Therefore, when an article is located between the tip ends of the fiber units 1, 1 in the high temperature processing chamber 10, the article intercepts the light and changes the light reception signal of the optical sensor 9, thereby detecting the article. Is performed.
上記実施例の場合、高温処理室10の熱は第２の管体6,6
に伝達されるが、熱伝導抑制管7,7により抑制されて第
１の管体5,5にはそれほど伝達されない。従って、透過
形光センサ９が高温になることがなく、光センサ９の動
作特性が変化して検出精度が低下するということもな
い。また、光ファイバ２の大部分を第１及び第２の管体
５及び６で被っているので、強度を充分に確保でき、光
ファイバ２が外力により破損する虞もない。In the case of the above embodiment, the heat of the high temperature processing chamber 10 is generated by the second pipes 6,6.
However, the heat conduction is suppressed by the heat conduction suppressing tubes 7, 7 and is not so much transmitted to the first tube bodies 5, 5. Therefore, the transmissive optical sensor 9 does not reach a high temperature, and the operating characteristics of the optical sensor 9 do not change and the detection accuracy does not deteriorate. Further, since most of the optical fiber 2 is covered with the first and second tubular bodies 5 and 6, sufficient strength can be ensured and there is no fear that the optical fiber 2 will be damaged by an external force.
ところで、高温処理室10としては例えばICハンドラと称
されるIC検査装置の高温部保温室が考えられる。この高
温部保温室は高温度に保温された状態において内部にIC
を収納して各種の特性の検査を行なうのであるが、一般
に高温部保温室は小さく且つ保温能力も小さいので、従
来の様なファイバユニットを用いたのでは、光センサの
検出精度を低下させることは勿論のこと、高温部保温室
の熱がファイバユニットの外被管を介して放散されて熱
損失が大となり高温部保温室の保温効果が損われる問題
がある。これに対して、本実施例の如きファイバユニッ
ト１を用いれば、前述したようにして光センサ９の検出
精度の低下を防止し得、又、熱伝導抑制管７が高温処理
室（高温部保温室）10側に位置して外被管３を介する熱
放散が少なくなるので、熱損失を極力少なくすることが
できる。By the way, as the high temperature processing chamber 10, for example, a high temperature room greenhouse of an IC inspection device called an IC handler can be considered. This high temperature part greenhouse is IC inside when it is kept at high temperature.
However, since the high temperature part greenhouse is generally small and the heat retaining capacity is also small, using a conventional fiber unit may reduce the detection accuracy of the optical sensor. Needless to say, there is a problem that the heat of the high temperature greenhouse is dissipated through the jacket tube of the fiber unit, resulting in a large heat loss and impairing the heat retaining effect of the high temperature greenhouse. On the other hand, if the fiber unit 1 according to the present embodiment is used, the detection accuracy of the optical sensor 9 can be prevented from deteriorating as described above, and the heat conduction suppressing tube 7 can prevent the heat conduction from increasing. Since it is located on the chamber (10) side and the heat dissipation through the jacket pipe 3 is small, the heat loss can be minimized.
又、被検出部位としては高温処理室10の代りに例えばIC
検査装置の低温部保冷室も考えられる。この低温部保冷
室は低温度に保冷された状態において内部にICを収納し
て各種の特性の検査を行なうのであるが、この場合にも
一般に低温部保冷室は小さく且つ保冷能力も小さいの
で、従来の様なファイバユニットを用いたのでは、光セ
ンサの熱がファイバユニットの外被管を介して低温部保
冷室に伝達され、結果として光センサ側の温度を必要以
上に低下させることになって光センサの検出精度が低く
なる問題が生じ、又、光センサ側の熱が低温部保冷室に
伝達されることにより低温部保冷室が熱を吸収して熱損
失が大となり、低温部保冷室の保冷効果が損われる問題
がある。これに対して、本実施例のファイバユニット１
を用いれば、熱伝達を抑制し得ることから上述したよう
な問題を解消することができる。In addition, instead of using the high temperature processing chamber 10 as the detected part, for example, an IC
A low temperature cold room of the inspection device is also conceivable. This low temperature section cold room is used to inspect the various characteristics by storing the IC inside when it is kept cold at low temperature.However, in this case as well, the low temperature section cold room is generally small and has a low cold storage capacity. With the conventional fiber unit, the heat of the optical sensor is transferred to the cold room of the low temperature section via the jacket tube of the fiber unit, and as a result, the temperature of the optical sensor side is lowered more than necessary. As a result, the detection accuracy of the optical sensor becomes low, and the heat of the optical sensor is transferred to the low temperature cool room, so that the low temperature cool room absorbs the heat and the heat loss becomes large. There is a problem that the cold insulation effect of the room is impaired. On the other hand, the fiber unit 1 of the present embodiment
With the use of, the heat transfer can be suppressed, so that the above-mentioned problems can be solved.
本考案は上記し且つ図面に示す実施例にのみ限定される
ものではなく、例えば、熱伝導抑制管７としてはシリコ
ンゴムに限らずポリエステルエストラマ等の耐熱樹脂で
形成しても良く、又、透過形に限らず反射形の光センサ
に適用しても良い等、要旨を逸脱しない範囲で適宜実施
できる。The present invention is not limited to the embodiments described above and shown in the drawings. For example, the heat conduction suppressing tube 7 is not limited to silicon rubber and may be formed of a heat resistant resin such as polyester elastomer. The present invention is not limited to the transmissive type and may be applied to a reflective type optical sensor, etc., and can be appropriately implemented without departing from the scope.
［考案の効果］ 以上の説明から明らかなように本考案は、光ファイバを
被う可撓性を有する金属製の外被管の一部に熱伝導率の
低い材料からなる熱伝導抑制管を用いたので、外被管に
よる熱伝導を抑制でき、この場合でも外力に対する強度
を充分に確保し得るという効果を奏する。[Effects of the Invention] As is apparent from the above description, the present invention provides a heat conduction suppressing tube made of a material having a low heat conductivity in a part of a flexible metal outer tube covering the optical fiber. Since it is used, it is possible to suppress the heat conduction due to the jacket pipe, and even in this case, it is possible to sufficiently secure the strength against the external force.
図面は本考案を透過形光電スイッチに適用した一実施例
を示すもので、第１図はファイバユニットの縦断面図、
第２図は全体の斜視図である。 図中、１はファイバユニット、２は光ファイバ、３は外
被管、７は熱伝導抑制管、９は光センサ（検出器）、10
は高温処理室（被検出部位）を示す。The drawing shows an embodiment in which the present invention is applied to a transmission type photoelectric switch. FIG. 1 is a longitudinal sectional view of a fiber unit,
FIG. 2 is a perspective view of the whole. In the figure, 1 is a fiber unit, 2 is an optical fiber, 3 is a jacket tube, 7 is a heat conduction suppressing tube, 9 is an optical sensor (detector), 10
Indicates a high temperature processing chamber (detection site).
Claims (1)
は低温の被検出部位に配置すると共に基端部を電子部品
を搭載した検出器に接続して使用するものにおいて、前
記光ファイバを可撓性を有する金属製の外被管により被
い、この外被管の一部に熱伝導率の低い材料からなる熱
伝導抑制管を用いた構成としたことを特徴とするファイ
バユニット。Claim: What is claimed is: 1. A heat-resistant optical fiber, wherein the tip end portion is arranged at a high or low temperature detection site and the base end portion is connected to a detector equipped with electronic parts for use. A fiber unit, characterized in that it is covered with a flexible metallic jacket tube, and a heat conduction suppressing tube made of a material having a low thermal conductivity is used as a part of the jacket tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987072225U JPH0753049Y2 (en) | 1987-05-14 | 1987-05-14 | Fiber unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987072225U JPH0753049Y2 (en) | 1987-05-14 | 1987-05-14 | Fiber unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63180814U JPS63180814U (en) | 1988-11-22 |
| JPH0753049Y2 true JPH0753049Y2 (en) | 1995-12-06 |
Family
ID=30915495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987072225U Expired - Lifetime JPH0753049Y2 (en) | 1987-05-14 | 1987-05-14 | Fiber unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753049Y2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56170817U (en) * | 1980-05-21 | 1981-12-17 | ||
| JPS573210U (en) * | 1980-06-04 | 1982-01-08 | ||
| JPS5735805A (en) * | 1980-08-13 | 1982-02-26 | Nippon Telegr & Teleph Corp <Ntt> | Submarine optical cable |
| JPH0746897Y2 (en) * | 1985-05-27 | 1995-10-25 | 三菱電線工業株式会社 | Hikari fiberscope |
-
1987
- 1987-05-14 JP JP1987072225U patent/JPH0753049Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63180814U (en) | 1988-11-22 |
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