JPH075444Y2 - Heat shrinkable tube heater for optical fiber reinforcement - Google Patents
Heat shrinkable tube heater for optical fiber reinforcementInfo
- Publication number
- JPH075444Y2 JPH075444Y2 JP1988153878U JP15387888U JPH075444Y2 JP H075444 Y2 JPH075444 Y2 JP H075444Y2 JP 1988153878 U JP1988153878 U JP 1988153878U JP 15387888 U JP15387888 U JP 15387888U JP H075444 Y2 JPH075444 Y2 JP H075444Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heater
- outside air
- heat
- shrinkable tube
- 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
この考案は、光ファイバの接続部を補強するための熱収
縮チューブを加熱する加熱器の改良に関する。The present invention relates to an improvement of a heater for heating a heat-shrinkable tube for reinforcing a connecting portion of an optical fiber.
従来より、光ファイバを接続する際には被覆を剥離して
心線を融着接続するので、この接続部を補強するため熱
収縮チューブをこの接続部に被せてこれに熱を加え、収
縮させることが行なわれている。このための加熱器は、
従来では単なるヒーターからなり、温度制御はまったく
行なわれていないのが普通である。温度制御を行なうも
のもあるが、その場合、温度センサをヒーターに直接取
り付けてヒーターの温度を検出し、その温度が一定にな
るように制御するようにしている。Conventionally, when connecting an optical fiber, the coating is peeled off and the core wire is fusion-spliced.Therefore, in order to reinforce this connection part, a heat shrinkable tube is covered over this connection part, and heat is applied to this to shrink it. Is being done. The heater for this is
Conventionally, it consists of a mere heater, and temperature control is usually not performed at all. Some of them perform temperature control. In that case, a temperature sensor is directly attached to the heater to detect the temperature of the heater and control the temperature to be constant.
しかしながら、従来のように単にヒーターが一定の温度
となるように温度制御するだけでは不十分である。すな
わち、一定の温度に保持しても、外気温により熱収縮チ
ューブから奪われる熱量が異なるので、熱収縮チューブ
が収縮するのに要する時間は外気温が低いときは長くな
り、外気温が高いときは短くなる。そこで、従来では外
気温が低いときは長い時間加熱するように考慮しない
と、熱収縮チューブを完全に収縮させることができず、
不完全な補強しかできないという欠点があった。 この考案は、どのような外気温でも一定の時間で熱収縮
チューブを完全に収縮させて確実な補強を行なうことが
できる、光ファイバ補強用熱収縮チューブ加熱器を提供
することを目的とする。However, it is not sufficient to simply control the temperature of the heater so that the heater has a constant temperature as in the conventional case. That is, even if the temperature is kept constant, the amount of heat taken from the heat-shrinkable tube differs depending on the outside air temperature. Therefore, the time required for the heat-shrinkable tube to shrink becomes longer when the outside air temperature is low and increases when the outside air temperature is high. Becomes shorter. Therefore, in the past, unless consideration is given to heating for a long time when the outside air temperature is low, the heat shrink tube cannot be completely shrunk,
It had the drawback that it could only be incompletely reinforced. It is an object of the present invention to provide a heat-shrinkable tube heater for reinforcing an optical fiber, which can completely shrink the heat-shrinkable tube in a certain period of time regardless of the outside air temperature to perform reliable reinforcement.
上記目的を達成するため、この考案による光ファイバ補
強用熱収縮チューブ加熱器においては、光ファイバの接
続部が通された光ファイバ補強用熱収縮チューブを加熱
するためのヒーターと、該ヒーターの熱が伝達されるよ
うに取り付けられた第１の感温素子と、外気温に感応す
る第２の感温素子と、上記の第１の感温素子の出力に応
じて上記ヒーターを制御することによりヒーター温度を
基準温度に保つとともに、上記の第２の感温素子の出力
により上記の基準温度を実質的に変化させて上記基準温
度を外気温が低いときに高め、外気温が高いときに低く
するヒーター制御回路とが備えられる。In order to achieve the above-mentioned object, in a heat-shrinkable tube heater for reinforcing an optical fiber according to the present invention, a heater for heating the heat-shrinkable tube for reinforcing an optical fiber through which an optical fiber connecting portion is passed, and a heat of the heater. By controlling the heater according to the output of the first temperature-sensing element, the second temperature-sensing element sensitive to the outside air temperature, and the first temperature-sensing element. While maintaining the heater temperature at the reference temperature, the reference temperature is substantially changed by the output of the second temperature sensing element to raise the reference temperature when the outside air temperature is low, and lower when the outside air temperature is high. And a heater control circuit.
第１の感温素子によりヒーターの温度が検出され、第２
の感温素子により外気温が検出される。ヒーターは、第
１の感温素子の出力に応じて制御されることによって、
基準温度に維持される。そして、その基準温度が第２の
感温素子の出力により実質的に変化させられ、基準温度
が外気温が低いときに高められ、外気温が高いときに低
くさせられる。 そのため、単に、ヒーターの温度を外気温によらず一定
にする（基準温度に保つ）だけにとどまらず、それから
一歩踏み込んで基準温度自体を外気温によって実質的に
変化させることにより、ヒーターから熱収縮チューブに
伝達される途中で外気により奪われる熱量が外気温によ
って変動することを積極的に補償するような、積極的な
ヒーター温度制御がなされることになる。その結果、熱
収縮チューブに加えられる実質的な熱量を、外気温によ
らず常に一定にすることができるため、常に一定の時間
で熱収縮チューブを完全に収縮させることができる。 したがって、外気温を考慮せずに熱収縮チューブの加熱
作業を行なっても、常に一定の時間で完全な補強を行な
うことができる。The temperature of the heater is detected by the first temperature sensitive element, and the second
The temperature sensor detects the outside temperature. The heater is controlled according to the output of the first temperature sensitive element,
Maintained at reference temperature. Then, the reference temperature is substantially changed by the output of the second temperature sensitive element, and the reference temperature is raised when the outside air temperature is low and lowered when the outside air temperature is high. Therefore, the heat shrinks from the heater not only by keeping the temperature of the heater constant regardless of the outside temperature (keeping it at the reference temperature) but also by taking a step further and changing the reference temperature itself substantially according to the outside temperature. Active heater temperature control is performed so as to positively compensate for fluctuations in the amount of heat taken by the outside air due to the outside air temperature while being transferred to the tube. As a result, the substantial amount of heat applied to the heat-shrinkable tube can always be made constant irrespective of the outside air temperature, so that the heat-shrinkable tube can be completely shrunk in a constant time. Therefore, even if the heat-shrink tube heating operation is performed without considering the outside air temperature, it is possible to always perform complete reinforcement in a fixed time.
つぎにこの考案の一実施例にかかる光ファイバ補強用熱
収縮チューブ加熱器について図面を参照しながら説明す
る。第１図において、ヒーター１の熱が良好に伝達され
るようにサーミスタ３がこのヒーター１に密着されてい
る。また、もう一つのサーミスタ４は外気温により感応
し易い適宜な箇所に取り付けられている。これらのサー
ミスタ３、４と、抵抗器２、５とによりブリッジ回路が
形成されており、一定の電圧（＋Ｖ）が印加される。抵
抗器２とサーミスタ３との接続点（これをＡ点という）
に現われる電圧と、サーミスタ４と抵抗器５との接続点
（これをＢ点という）に現われる電圧とが、比較器６に
よって比較される。そしてこの比較器６の出力信号は制
御信号としてヒーター駆動回路７に送られる。ヒーター
駆動回路７は入力された制御信号に応じてヒーター１に
流す電流を変える。 このヒーター１の上に熱収縮チューブ９が配置される。
この熱収縮チューブ９は光ファイバ８の接続部に被せら
れるもので、光ファイバ接続部がその中に挿入された状
態でヒーター１の上に置かれる。なおヒーター１はこの
図では平板状に描いているが、溝状のものなどが使用で
きる。 光ファイバ８の接続部が挿入された熱収縮チューブ９を
ヒーター１の上に置き、電源スイッチをオンすると、ヒ
ーター駆動回路７からヒーター１に電流が供給されて、
ヒーター１が加熱開始する。ヒーター１の温度が上昇し
てくると、サーミスタ３の抵抗値は小さくなり、抵抗器
２とサーミスタ３との接続点Ａに生じる電圧は徐々に低
くなってくる。この電圧が、サーミスタ４と抵抗器５と
の接続点Ｂに生じる電圧よりも低くなると比較器６の出
力が反転し、それに応じてヒーター駆動回路７からヒー
ター１へ供給される駆動電流がオフになる。そして、駆
動電流がオフになったことによりヒーター１の温度が下
がると、抵抗器２とサーミスタ３との接続点Ａに生じる
電圧が高くなってきて、サーミスタ４と抵抗器５との接
続点Ｂの電圧より高くなると比較器６の出力が逆に反転
し、駆動電流がオンになってヒーター１の加熱が再開さ
れる。このようなオン・オフ制御によりヒーター１の温
度が、サーミスタ４と抵抗器５との接続点Ｂに現われる
電圧に対応した温度に維持されることになる。すなわ
ち、このサーミスタ４と抵抗器５との接続点Ｂに現われ
る電圧が基準温度に対応する基準電圧ということにな
る。 他方、サーミスタ４は外気温に感応するようにされてお
り、外気温が高いときその抵抗値が低く、外気温が低い
とき抵抗値が高くなる。そのため、サーミスタ４と抵抗
器５との接続点Ｂに生じる基準電圧は外気温が高いとき
高くなり、外気温が低いとき低くなる。つまり、基準温
度が、外気温が高いときに低く、外気温が低いときに高
くなるよう、基準温度が外気温に応じて変化するわけで
ある。 その結果、外気温が高いときはヒーター温度がより低い
状態でヒーター駆動電流がオフになり、ヒーター１の温
度は低い基準温度に維持される。逆に外気温が低いとき
はオフになるヒーター温度が高くなり、ヒーター１の温
度が高い基準温度を維持するように制御されることにな
る。 したがって、外気温によらず、熱収縮チューブ９の温度
は一定になり、その収縮に要する時間は一定のものとな
る。すなわち、外気温が高いときは基準電圧（Ｂ点電
圧）が高くなるのでヒーター１の温度がより低い基準温
度に達したときヒーター駆動電流がオフになり、外気温
が低いときは基準電圧（Ｂ点電圧）が低くなるのでヒー
ター１の温度がより高い基準温度にならなければヒータ
ー駆動電流はオフにならないので、こうしてヒーター１
がオン・オフ制御されることによりヒーター１の温度は
外気温が高いときに低くなった基準温度に、外気温が低
いときに高くなった基準温度に維持される。そのため、
外気温によって奪われる熱量が多いとき、つまり外気温
が低いときはヒーター１の温度を高めて熱収縮チューブ
９への加熱量を多くし、外気温によって奪われる熱量が
少ないとき（外気温が高いとき）はヒーター１の温度を
低くして熱収縮チューブ９への加熱量を少なくし、これ
によって、熱収縮チューブ９が外気温の変動によらず一
定の温度を維持するようにされる。 そのため、熱収縮チューブ９は外気温によらずに一定の
時間で収縮し、外気温によって加熱時間を調整する手間
を省いて、つねに一定時間の加熱で良好な補強を施すこ
とができる。 なお、この考案は上記の実施例に限定されるものでな
く、この考案の趣旨を逸脱しない範囲で種々に変更可能
である。たとえば感温素子としてサーミスタ以外に他の
素子を使用することももちろんできる。Next, a heat-shrinkable tube heater for reinforcing an optical fiber according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a thermistor 3 is closely attached to the heater 1 so that the heat of the heater 1 is satisfactorily transferred. Further, the other thermistor 4 is attached to an appropriate location that is more sensitive to the outside air temperature. A bridge circuit is formed by these thermistors 3 and 4 and resistors 2 and 5, and a constant voltage (+ V) is applied. Connection point between resistor 2 and thermistor 3 (this is called point A)
Is compared with the voltage appearing at the connection point between the thermistor 4 and the resistor 5 (this is called point B). The output signal of the comparator 6 is sent to the heater driving circuit 7 as a control signal. The heater drive circuit 7 changes the current flowing through the heater 1 according to the input control signal. A heat-shrinkable tube 9 is arranged on the heater 1.
The heat-shrinkable tube 9 covers the connecting portion of the optical fiber 8 and is placed on the heater 1 with the optical fiber connecting portion inserted therein. Although the heater 1 is drawn in a flat plate shape in this drawing, a groove-shaped heater or the like can be used. When the heat-shrinkable tube 9 in which the connecting portion of the optical fiber 8 is inserted is placed on the heater 1 and the power switch is turned on, a current is supplied from the heater driving circuit 7 to the heater 1,
The heater 1 starts heating. As the temperature of the heater 1 rises, the resistance value of the thermistor 3 becomes smaller and the voltage generated at the connection point A between the resistor 2 and the thermistor 3 becomes gradually lower. When this voltage becomes lower than the voltage generated at the connection point B between the thermistor 4 and the resistor 5, the output of the comparator 6 is inverted and the drive current supplied from the heater drive circuit 7 to the heater 1 is accordingly turned off. Become. Then, when the temperature of the heater 1 decreases due to the drive current being turned off, the voltage generated at the connection point A between the resistor 2 and the thermistor 3 increases, and the connection point B between the thermistor 4 and the resistor 5 increases. When the voltage becomes higher than the voltage of 1, the output of the comparator 6 is reversed, the drive current is turned on, and the heating of the heater 1 is restarted. By such on / off control, the temperature of the heater 1 is maintained at a temperature corresponding to the voltage appearing at the connection point B between the thermistor 4 and the resistor 5. That is, the voltage appearing at the connection point B between the thermistor 4 and the resistor 5 is the reference voltage corresponding to the reference temperature. On the other hand, the thermistor 4 is made sensitive to the outside air temperature, and has a low resistance value when the outside air temperature is high, and has a high resistance value when the outside air temperature is low. Therefore, the reference voltage generated at the connection point B between the thermistor 4 and the resistor 5 is high when the outside air temperature is high, and is low when the outside air temperature is low. That is, the reference temperature changes according to the outside air temperature such that the reference temperature is low when the outside air temperature is high and is high when the outside air temperature is low. As a result, when the outside air temperature is high, the heater driving current is turned off in a state where the heater temperature is lower, and the temperature of the heater 1 is maintained at the low reference temperature. On the contrary, when the outside air temperature is low, the heater temperature that is turned off becomes high, and the temperature of the heater 1 is controlled so as to maintain the high reference temperature. Therefore, the temperature of the heat-shrinkable tube 9 becomes constant regardless of the outside air temperature, and the time required for the shrinkage becomes constant. That is, when the outside air temperature is high, the reference voltage (point B voltage) increases, so when the temperature of the heater 1 reaches a lower reference temperature, the heater driving current is turned off, and when the outside air temperature is low, the reference voltage (B Since the point voltage) becomes low, the heater drive current cannot be turned off unless the temperature of the heater 1 reaches a higher reference temperature.
The ON / OFF control of the heater maintains the temperature of the heater 1 at the reference temperature that becomes low when the outside air temperature is high, and at the reference temperature that becomes high when the outside air temperature is low. for that reason,
When the amount of heat taken by the outside air temperature is large, that is, when the outside air temperature is low, the temperature of the heater 1 is increased to increase the amount of heat applied to the heat-shrinkable tube 9, and when the amount of heat taken by the outside air temperature is small (the outside air temperature is high. At the time), the temperature of the heater 1 is lowered to reduce the amount of heat applied to the heat-shrinkable tube 9, whereby the heat-shrinkable tube 9 is maintained at a constant temperature regardless of the fluctuation of the outside air temperature. Therefore, the heat-shrinkable tube 9 shrinks in a constant time regardless of the outside air temperature, and it is possible to save the trouble of adjusting the heating time according to the outside air temperature and always perform good reinforcement by heating for a certain time. The present invention is not limited to the above embodiment, but can be variously modified without departing from the spirit of the present invention. For example, it is of course possible to use other elements as the temperature sensitive element other than the thermistor.
この考案の光ファイバ補強用熱収縮チューブ加熱器によ
れば、外気温にかかわらずヒーター温度を一定の基準温
度に保つのではなく、基準温度自体を外気温によって実
質的に変化させることにより、外気温の変動によって変
動する、ヒーターから熱収縮チューブに伝達される途中
で外気により奪われる熱量を積極的に補償し、常に一定
の熱量を熱収縮チューブに実質的に加えることができ
る。その結果、外気温の変動に影響されずに一定時間の
加熱で光ファイバ接続部の良好な補強が達成されること
の確実性が増大する。According to the heat shrinkable tube heater for reinforcing the optical fiber of the present invention, the heater temperature is not maintained at a constant reference temperature regardless of the outside air temperature, but the reference temperature itself is substantially changed according to the outside air temperature. It is possible to positively compensate for the amount of heat taken by the outside air during the transfer from the heater to the heat-shrinkable tube, which fluctuates due to fluctuations in air temperature, and can always add a substantially constant amount of heat to the heat-shrinkable tube. As a result, it is possible to increase the certainty that good reinforcement of the optical fiber connection portion can be achieved by heating for a certain period of time without being affected by changes in the outside air temperature.
第１図はこの考案にかかる光ファイバ補強用熱収縮チュ
ーブ加熱器の一実施例を示す模式図である。 １……ヒーター、２、５……抵抗器、３……ヒーター温
度検出用サーミスタ、４……外気温検出用サーミスタ、
６……比較器、７……ヒーター駆動回路、８……光ファ
イバ、９……熱収縮チューブ。FIG. 1 is a schematic diagram showing an embodiment of a heat-shrinkable tube heater for reinforcing an optical fiber according to the present invention. 1 ... Heater, 2 ... 5 Resistor, 3 ... Heater temperature detection thermistor, 4 ... Outside air temperature detection thermistor,
6 ... Comparator, 7 ... Heater drive circuit, 8 ... Optical fiber, 9 ... Heat shrink tube.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 吉沼 幹夫 千葉県佐倉市六崎1440番地 藤倉電線株式 会社佐倉工場内 (56)参考文献 特開 昭59−111122（ＪＰ，Ａ) 特開 昭54−111388（ＪＰ，Ａ) 特開 昭63−106706（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Yoshinuma 1440 Rokuzaki, Sakura City, Chiba Prefecture Sakura Factory, Fujikura Electric Wire Co., Ltd. (56) References JP-A-59-111122 (JP, A) JP-A-54-111388 (JP, A) JP-A-63-106706 (JP, A)
Claims (1)
補強用熱収縮チューブを加熱するためのヒーターと、該
ヒーターの熱が伝達されるように取り付けられた第１の
感温素子と、外気温に感応する第２の感温素子と、上記
の第１の感温素子の出力に応じて上記ヒーターを制御す
ることによりヒーター温度を基準温度に保つとともに、
上記の第２の感温素子の出力により上記の基準温度を実
質的に変化させて上記基準温度を外気温が低いときに高
め、外気温が高いときに低くするヒーター制御回路とか
らなる光ファイバ補強用熱収縮チューブ加熱器。1. A heater for heating a heat-shrinkable tube for reinforcing an optical fiber, through which a connecting portion of the optical fiber is passed, and a first temperature-sensitive element mounted so that heat of the heater is transferred. By controlling the heater according to the output of the second temperature sensitive element sensitive to the outside air temperature and the first temperature sensitive element, the heater temperature is maintained at the reference temperature,
An optical fiber comprising a heater control circuit that substantially changes the reference temperature by the output of the second temperature sensitive element to increase the reference temperature when the outside air temperature is low and lowers it when the outside air temperature is high. Heat-shrinkable tube heater for reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988153878U JPH075444Y2 (en) | 1988-11-25 | 1988-11-25 | Heat shrinkable tube heater for optical fiber reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988153878U JPH075444Y2 (en) | 1988-11-25 | 1988-11-25 | Heat shrinkable tube heater for optical fiber reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0273602U JPH0273602U (en) | 1990-06-05 |
| JPH075444Y2 true JPH075444Y2 (en) | 1995-02-08 |
Family
ID=31430107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988153878U Expired - Lifetime JPH075444Y2 (en) | 1988-11-25 | 1988-11-25 | Heat shrinkable tube heater for optical fiber reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075444Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6318435B2 (en) | 2014-01-28 | 2018-05-09 | Ｓｅｉオプティフロンティア株式会社 | Reinforcing device for optical fiber connection |
| JP6320766B2 (en) | 2014-01-28 | 2018-05-09 | Ｓｅｉオプティフロンティア株式会社 | Optical fiber fusion splicer |
| JP6249521B2 (en) | 2014-01-28 | 2017-12-20 | Ｓｅｉオプティフロンティア株式会社 | Optical fiber fusion splicer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031253B2 (en) * | 1978-02-20 | 1985-07-20 | 株式会社フジクラ | Method for measuring temperature of optical fiber heat-sealed part |
| JPS59111122A (en) * | 1982-12-16 | 1984-06-27 | Nippon Telegr & Teleph Corp <Ntt> | Heating method of heat-shrinkable tube for reinforcing optical fiber |
| JPS63106706A (en) * | 1986-10-24 | 1988-05-11 | Fujikura Ltd | Fusion splicing device for optical fiber |
-
1988
- 1988-11-25 JP JP1988153878U patent/JPH075444Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0273602U (en) | 1990-06-05 |
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