JP2000019331A - Device for removing coating of coated optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable long-term use and to make it possible to surely remove the coating part front end of a coated optical fiber. SOLUTION: This device for removing the coating of the coated optical fiber removes an optical fiber f0 by removing the coating part front end f1 of the coated optical fiber F after heating and softening the coating part front end to expose the optical fiber f0 and has a heater 10 for heating the coating part front end f1, a temp. sensor 11 for detecting the heating state by the heat generation of the heater 10, a charging batter 13 and a control circuit S for controlling the connecting state of the heater 10, an external power source and the charging battery 13. A rapid exothermic mode for causing the rapid heat generation of the heater 10 by the external power source and the charging battery 13 connected in series, a charging battery exothermic mode for causing the heat generation of only the heater 10 by the charging battery 13 and a charging battery charging mode for charging the charging battery 13 by the external powder are selectively executed by a control circuits in accordance with the detection result of the temp. sensor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber stripping apparatus for removing a coating on a terminal portion of an optical fiber strip when connecting the optical fiber strip.

[0002]

2. Description of the Related Art As an optical fiber stripping apparatus, there is known an apparatus described in Japanese Utility Model Application Laid-Open No. 61-160401. The sheath removing device described in Japanese Utility Model Application Laid-Open No. 61-160401 removes a synthetic resin sheath at the tip of an optical fiber core after heating and softening when connecting optical fiber cores. . Since the coating is removed after heating and softening, only the coating can be removed cleanly without damaging the optical fiber itself in the coating. As the temperature conditions for the coating removal, as described in “Development of a heating type coating removal tool for tape fiber B-354” on page B-1-138, Proceedings of the IEICE Autumn National Convention 1988, It is known that about 90 ° C. at which the removing power is reduced is preferable.

[0003]

The above-described coating removing apparatus is used in a state where it is connected to an external power supply via a connection cord.
A 100V power supply or a portable battery is used. In order to smoothly perform the coating removing operation, it is necessary that the heater is quickly heated to a temperature suitable for removing the coating after the heater of the coating removing device is energized, and the coating is once removed. Once the temperature has reached a suitable temperature, it is necessary to maintain this temperature. Further, when the heater is heated only by the battery, there is a demand to reduce power consumption as much as possible in order to extend the operable time.

The present invention is intended to solve such a problem, and can be used for a long time, and has two functions of rapid heating and low power consumption. An object of the present invention is to provide an optical fiber core stripping device capable of reliably removing the coating fiber tip of the fiber core.

[0005]

According to the present invention, there is provided an optical fiber core stripping apparatus for exposing an optical fiber by removing the end of the coating part of the optical fiber core after heating and softening the coated part. A heater that heats the covering portion tip, a temperature sensor that detects a heating state due to heat generated by the heater, a rechargeable battery, and a control circuit that controls a connection state between the heater, an external power supply, and the rechargeable battery, A rapid heat generation mode in which the heater is rapidly heated by an external power supply and a rechargeable battery connected in series, a rechargeable battery heat generation mode in which the heater is heated only by the rechargeable battery, and a rechargeable battery charging mode in which the rechargeable battery is charged by the external power supply, It is selectively executed by the control circuit based on the detection result of the temperature sensor.

A second aspect of the present invention is characterized in that, in the first aspect of the present invention, an external power supply heating mode in which a heater is heated only by an external power supply is selectively executed.

[0007] The invention described in claim 3 is the first or second invention.
In the invention described in (1), the heater is formed by patterning a platinum-based resistor on a ceramic substrate.

According to a fourth aspect of the present invention, in the first or second aspect, the heater has a structure in which a platinum-based resistor is sandwiched between sheet-shaped resin substrates.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus for removing coating of an optical fiber core according to the present invention will be described with reference to the drawings.

FIG. 1 shows the appearance of an embodiment of the coating removing apparatus of the present invention. This coating removing apparatus 1 includes an apparatus main body 1A,
A main body side lid 1B attached to the apparatus main body 1A so as to be openable and closable, a slide section 1C slidably mounted on the apparatus main body 1A, and a slide section 1C.
Slide part side lid part 1 attached to open and close freely
D and a fiber holder 1E attached to the slide portion 1C.

The apparatus main body 1A has a form that becomes a rectangular parallelepiped when the main body side lid 1B is closed. On a surface of the apparatus main body 1A facing the main body side lid 1B, a main body side gripping portion 1 for gripping a coating portion distal end f1 of the optical fiber core F is provided.
4a is attached. On the other hand, a lid-side grip portion 14b for gripping the coating portion distal end f1 of the optical fiber core F is attached to a surface of the main body-side lid portion 1B facing the device main body 1A. FIG. 1 shows a tape-shaped optical fiber core F
2 shows a state in which the distal end of is set on the main body side grip portion 14a.

Also, as shown in FIG.
A heater 10 is disposed on the back side of the main body side grip portion 14a inside A. The heater 10 is connected to the control circuit S, and the temperature sensor 11 is also connected to the control circuit S. The temperature sensor 11 detects the heating state of the heater 10 by detecting the temperature of the heater 10. By detecting the temperature of the heater 10 by the temperature sensor 11, the temperature state of the main body side grip portion 14a and the lid side grip portion 14b can be known.

The control circuit S is connected to an external power supply 20 (see FIGS. 3 to 6) via a plug-in jack 16, and the electric power of the external power supply 20 is supplied to the heater 10 and the temperature via the control circuit S. A circuit for supplying the sensor 11 is built in the apparatus main body 1A. An electric circuit for supplying power to the heater 10 will be described later in detail. In addition,
As the external power supply 20 in this embodiment, a battery inside the fusion splicing device 2 shown in FIG. 8 is used.

As shown in FIG. 7A, the heater 10 is formed by patterning a platinum-based resistor R on a ceramic substrate 10a and sandwiching the pattern with a ceramic substrate 10a. As the resistor R, specifically, platinum palladium (high corrosion resistance at high temperature), tungsten, molybdenum, nickel, chromium, or the like is used. Among these, a platinum-based resistor having high corrosion resistance at a high temperature is preferable, and in this embodiment, a platinum-based resistor is used.

A platinum-based resistor R is provided on a ceramic substrate 10a.
Is patterned, and a ceramic substrate 1 is further formed thereon.
FIG. 7 shows the heater 10 sandwiched by the heater 10a.
Such as having a formation pattern as shown in (b),
Needless to say, those having various formation patterns can be used. In the heater 10 shown in FIG. 7B, the platinum-based resistor R is meandering.

As described above, by forming the heater 10 by patterning the platinum-based resistor R on the ceramic substrate 10a, the entire heater 10 can be made thinner and smaller.
It becomes easy to arrange in the coating removing device 1. Further, since the platinum-based resistor R that generates heat is easily arranged in a plane, it is possible to uniformly heat the portion heated by the heater 10 without causing variation in the temperature distribution, and the optical fiber core F can be heated. The coating portion tip f1 can be efficiently heated.

Further, the platinum-based resistor has the advantage that the characteristics such as the resistance value are uniform and is excellent in mass productivity, and also has the advantage that the heat capacity of the heater 10 itself can be reduced and thus the temperature control characteristic is excellent. That is, since the heat capacity of the heater 10 itself is small, the generated heat is immediately used for heating the optical fiber core F, and the temperature of the optical fiber core F rises faster. Further, depending on the design of the platinum-based resistor R, a portion heated by the heater 10 can be uniformly heated, or only a portion can be strongly heated.

Generally, the higher the temperature, the higher the resistance of a metal resistor such as the platinum-based resistor R. For this reason,
When a metal resistor is used as the resistor of the heater 10, when the temperature of the heater 10 becomes high, the resistance value increases, the flowing current is suppressed, and the power consumption is further suppressed. Power consumption can be reduced in controlling the temperature to be constant, which is convenient.

In this embodiment, the platinum-based resistor R
Are connected to the control circuit S as shown in FIGS. The control circuit S is supplied with power from the external power supply 20 as described above, and has the rechargeable battery 13 disposed therein. The heater 10 is connected to the control circuit S, and receives power from the external power supply 20 or the rechargeable battery 13 (or both) by switching the switches SW1 to SW5, as shown in FIGS.
It is needless to say that the switches SW1 to SW5 may be of a mechanical switching type or may be of a type using a semiconductor.

The switch SW1 is connected to the positive pole of the external power supply 20, and a switch SW2 is arranged to face the switch SW1. Switches SW1, SW2
To connect the positive electrode of the external power supply 20 to one end of the heater 10 (SW1 → a ← SW2).
Or connected to the positive electrode side of the rechargeable battery 13 (SW1 → b,
a ← SW2). Further, with the switch SW1 opened, the switch SW2 sets the +
The pole side is connected to one end of the heater 10 (SW1 →
a, b ← SW2).

The switch SW3 is also connected to the +
By controlling the switch SW3, the positive pole of the external power supply 20 can be connected to the negative pole of the rechargeable battery 13 (SW3 → c). Switch SW
3, when the positive pole of the external power supply 20 is connected to the negative pole of the rechargeable battery 13 (SW3 → c), the positive pole of the external power supply 20 is connected to the positive pole of the rechargeable battery 13 by the switch SW1 (SW1). → b) Never.

Further, a switch SW4 is connected to the negative pole side of the external power supply 20, and a switch SW5 is arranged to face the switch SW4. Switch SW
4, by controlling SW5, the negative pole of the external power supply 20 is connected to the other end of the heater 10 (SW4 → e
[Or d] ← SW5). Also, switch SW
By controlling the switches SW3 to SW5 in addition to 3, the negative pole of the external power supply 20 can be connected to the negative pole of the rechargeable battery 13 (SW4 → d ← SW3). , And with the switch SW4 opened,
5, the negative electrode of the rechargeable battery 13 can be connected to the other end of the heater 10 (SW4 → e, SW3 → d ← SW5).

The switches SW1 to SW5 are switched by a switching unit 12 in the control circuit S. Note that a temperature sensor 11 is also connected to the switching unit 12 of the control circuit S, and the above-described switches SW1 to SW5 are switched based on the detection result of the temperature sensor 11. Since the platinum-based resistor R has no polarity, it goes without saying that even if the polarity of the external power supply 20 and the polarity of the rechargeable battery 13 are simultaneously switched in the above description, it can be used without any problem.

As the temperature sensor 11 for detecting the temperature of the heater 10 described above, a commonly used temperature sensor is used, and specifically, a thermistor or the like is used.
When a thermistor is used, the temperature of the heater 10 can be detected from a change in the resistance value of the thermistor due to a change in temperature.

The above-described heater 10 and temperature sensor 11
Is controlled based on a signal from the temperature sensor 11 so that the temperature of the heater 10 is maintained within an optimum temperature range for removing the coating portion end f1 of the optical fiber core F. Next, the heat generation mode of the heater 10 is controlled. This temperature range can be adjusted by an adjustment knob 17 connected to the control circuit S (see FIGS. 1 and 2). This temperature range may be set as a fixed range in the circuit as a constant.

As shown in FIGS. 1 and 2, a flaw blade 15 is attached to the side of the slide portion 1C of the apparatus main body 1A and the main body side lid 1B. The pair of wound blades 15 are attached so that when the main body side lid 1B is closed with respect to the apparatus main body 1A, there is a slight gap between them facing each other. This gap is slightly narrower than the thickness of the tape-shaped optical fiber core F. When the main body side lid 1B is closed with respect to the apparatus main body 1A, the gap is formed at the coating end f1 of the optical fiber core F. Only scratch.

The sliding portion 1C slidably attached to the apparatus main body 1A has a sliding portion side lid 1 that can be opened and closed.
D. The fiber holder 1E holding the optical fiber core F can be set on the slide part 1C. By closing the slide part side lid part 1D, the base end side of the optical fiber core F is firmly connected via the fiber holder 1E. And grasp. As shown in FIG. 2B, the sliding portion 1C is connected to the apparatus main body 1A by a pair of shafts 18 and is guided by the shafts 18 to slide.

Next, a method of using the above-described coating removing apparatus will be briefly described.

First, the plug-in jack 16 is inserted into the coating removing apparatus 1 so that the power from the external power supply 20 is supplied. As shown in FIG. 8, the plug-in jack 16 is connected to the fusion splicing device 2 and supplies power from the external power supply (battery) 20 inside the fusion splicing device 2 to the coating removing device 1. I do. Since the coating of the optical fiber core F is removed as a preparation for the fusion splicing of the optical fiber core F, the coating removing device 1 is often used together with the fusion splicing device 2 in this way.

A switch (not shown) is turned on to start using the coating removing apparatus 1. When the use of the coating removing apparatus 1 is started, the temperature detection of the heater 10 by the temperature sensor 11 and the control of the power supply path by the control circuit S based on the temperature detection are started. At the time when the use of the coating removing apparatus 1 is started, the temperature of the heater 10 is almost normal temperature, and this state is detected by the temperature sensor 11. When the temperature of the heater 10 detected by the temperature sensor is lower than the set temperature range described above, the control circuit S causes the heater 10 to generate heat in the rapid heating mode (see FIG. 3).

In the rapid heating mode, as shown in FIG. 3, the switch SW1 is on the a side, the switch SW2 is on the b side,
The switch SW3 is switched to the c side, and the switches SW4 and SW5 are switched to the e [or d] side. That is, the heater 10 generates heat at a voltage obtained by adding the voltage of the external power supply 20 and the voltage of the rechargeable battery 13, and the temperature of the heater 10 is set to a temperature suitable for removing the coating portion tip f1 of the optical fiber core F (described above). Within the specified temperature range).

The temperature of the heater 10 is monitored via a temperature sensor 11. When the temperature of the heater 10 reaches the upper limit of the set temperature range, the switches SW1 to SW5 are controlled by the switching unit 12 in the control circuit S. Then, the power supply to the heater 10 is temporarily stopped. At this time, the state of the switches SW1 to SW5 is, for example, that the switch SW1
The switch SW2 is switched to the b side, the switch SW3 is switched to the c side, the switch SW4 is switched to the d side, and the switch SW5 is switched to the e side. However, if the power supply to the heater 10 can be stopped, the states of the switches SW1 to SW5 are not limited thereto. When the heat generation of the heater 10 is stopped, the temperature of the heater 10 gradually decreases, and when the temperature sensor 11 detects that the temperature of the heater 10 has reached the lower limit of the set temperature range, the switching unit 12 The mode is switched to the rechargeable battery heat generation mode (see FIG. 4), and the heater 10 generates heat again.

In the rechargeable battery heating mode, as shown in FIG. 4, the switch SW1 is on the a side, and the switch SW2 is on the b side.
The switch SW3 is switched to the d side, the switch SW4 is switched to the e side, and the switch SW5 is switched to the d side. That is, the heater 10 is connected only to the rechargeable battery 13 without being connected to the external power supply 20, and generates heat only by the voltage of the rechargeable battery 13. Therefore, in the rechargeable battery heating mode, the external power supply 20
Will not consume. The temperature of the heater 10 rises again within the above-mentioned set temperature range. The temperature of the heater 10 is monitored via a temperature sensor 11,
When the temperature of 0 reaches the upper limit of the set temperature range, the switches SW1 to 5 are controlled by the switching unit 12,
Power supply to the heater 10 is stopped again. By repeating this, the temperature of the heater 10 is maintained within the above-mentioned set temperature range.

When the heater 10 is repeatedly heated by the rechargeable battery 13, the rechargeable battery 13 is naturally consumed and the voltage of the rechargeable battery 13 drops. For this reason, the rechargeable battery charging mode for charging the rechargeable battery 13 by the external power supply 20 is appropriately performed between the rechargeable battery heat generation modes (FIG. 5).
reference). The above-described rechargeable battery charging mode may be performed in all intervals of the rechargeable battery heat generation mode.
Since the heat generation of 0 is a high load, even in this case, there is an effect of reducing the load on the external power supply 20. If the voltage of the rechargeable battery 13 can be detected in the control circuit S and the rechargeable battery charging mode is performed when the voltage of the rechargeable battery 13 becomes lower than the reference value, the effect of reducing the load on the external power supply 20 is improved. Can be done.

In the rechargeable battery charging mode, as shown in FIG. 5, the switch SW1 is on the b side and the switch SW2 is on the a side.
The switch SW3 is switched to the d side, the switch SW4 is switched to the d side, and the switch SW5 is switched to the e side. That is, the heater 10 is not energized, and the positive pole of the external power supply 20 and the positive pole of the rechargeable battery 13 are connected, and the negative pole of the external power supply 20 and the negative pole of the rechargeable battery 13 are connected. 20 charges the rechargeable battery 13.

In addition, when the temperature at the place where the work is performed is low, the capacity of the rechargeable battery 13 may be reduced. In the coating removal device of the embodiment,
The control circuit S can also selectively execute the external power supply heat generation mode. The external power supply heat generation mode may be urgently selected when the capacity of the rechargeable battery 13 is reduced, or the external power supply heat generation mode and the external power supply heat generation mode may be performed a specified number of times. It may be programmed and executed by the control circuit S regularly.

In the external power supply heat generation mode, as shown in FIG.
W3 is on the d [or c] side, switches SW4 and SW5 are on the e side
[If the switch SW3 is on the c side, the switch may be on the d side]. That is, the heater 10 is connected to only the external power supply 20 without being connected to the rechargeable battery 13 and the external power supply 2
Heat is generated only by the voltage of 0.

By selectively executing the above-described mode, the coating removing device 1 is maintained at an optimum temperature for removing the coating of the optical fiber core F. When removing the coating of the optical fiber core F, as shown in FIG. 2A, the fiber holder 1E holding the optical fiber core F is set on the slide portion 1C. Next, the main body side lid 1B and the slide part side lid 1D are closed.

The distal end of the optical fiber core F is gripped by a pair of grips 13 and 14, and the base end of the optical fiber core F is slid via a fiber holder 1E via a slide 1C.
And it will be in the state where it was grasped by slide part side lid part 1D. In addition, when the optical fiber core wire F is sandwiched between the grip portions 13 and 14, the covering portion is scratched by the pair of wound blades 15. The distal end of the coated portion of the optical fiber core F is heated and softened by the heat of the heater 10.

Next, as shown in FIG. 2 (b), the slide portion 1C is slid while the slide portion 1C and the slide portion side lid 1D are firmly pressed. With the sliding of the slide portion 1C, the tip f1 of the covering portion on the tip side from the portion damaged by the wound blade 15 remains sandwiched between the pair of grip portions 13 and 14, and is removed from the optical fiber core F. Is done. Coated end f of optical fiber core F
After 1 is removed, the optical fiber f0 is exposed. At this time, since the coating portion front end f1 is heated and softened, without applying excessive force to the optical fiber f0,
Moreover, it is possible to cleanly remove the coating portion tip f1 without leaving the resin residue of the coating portion.

After the coating removing operation is completed, the optical fiber core F is taken out together with the fiber holder 1E, and the next operation is performed.
For example, a fusion splicing operation between the terminal units is performed. If the fiber holder 1E can be set on the fusion splicer 2 as it is, the handling of the optical fiber core F can be performed easily.

In the above-described coating removing apparatus,
Although the covering end f1 of the tape-shaped optical fiber core F is removed, not only the tape-shaped optical fiber core F but also a single-core optical fiber core can be handled. As the heater 10, in addition to the ceramic-based substrate 10a shown in FIGS. 7 (a) and 7 (b) in which a platinum-based resistor R is patterned, as shown in FIG. 7 (c). Alternatively, a resistor in which a platinum-based resistor R is sandwiched between sheet resin substrates 10b may be used.

As shown in FIG. 7 (c), a heater 1 in which a platinum-based resistor R is sandwiched between sheet resin substrates 10b.
No. 0 has the advantage that the whole can be made thinner and smaller, so that it can be easily arranged in the coating removing device. Also,
Since the platinum-based resistor R that generates heat is easily arranged in a plane, it can be uniformly heated without causing a variation in temperature distribution in a portion heated by the heater 10, and the coated portion of the optical fiber core wire F can be heated. The tip f1 can be efficiently heated.

Further, the platinum-based resistor has the advantage that characteristics such as resistance value are uniform and excellent in mass productivity.
Since the heat capacity of 0 itself can be reduced, there is also an advantage that the temperature control characteristic is excellent. Further, depending on the design of the resistor R, it is possible to uniformly heat the portion heated by the heater 10 or to heat only a portion of the resistor R intensely. These advantages are similar to those of the heater 10 shown in FIGS. 7A and 7B. As the resin used for the sheet resin base material, a resin having excellent heat resistance such as a silicone resin, a tetrafluoride resin, and a polyimide resin is suitably used.

According to the coating removing apparatus of the above-described embodiment, the rapid heat generation mode in which the heater 10 generates heat at a high voltage (the voltage obtained by adding the voltage of the external power supply 20 and the voltage of the rechargeable battery 13) is used to quickly operate the heater 10 after energization. A state suitable for performing the coating removal can be obtained, and a smooth coating removal operation can be performed. Further, once the state is suitable for performing the coating removal, it is possible to maintain this state while reducing the power consumption of the external power supply 20 by using the rechargeable battery 13 to generate heat in the heater 10. it can. Therefore, when a battery or the like is used as the external power supply 20, the operable time can be extended. Further, when the voltage of the rechargeable battery 13 is decreased by causing the heater 10 to generate heat by the rechargeable battery 13, the rechargeable battery 13 can be charged by using the external power supply 20 in the rechargeable battery charging mode, so that the operation can be performed smoothly. Can continue.

The operation of removing the coating of the optical fiber is performed prior to the subsequent fusion splicing or connector connection after forming the connector. Subsequent work, for example, fusion splicing work, usually takes longer than the coating removal operation itself, and the coating removal apparatus is in a standby state rather than in actual use. It can be said that it is long. Since the standby state was long, the external power supply was exhausted,
The coating removal operation and the fusion splicing operation must not be hindered. On the other hand, at the time of use, it is important to be able to use immediately without waiting time in order to smoothly carry out the work.
The above-described coating removing apparatus solves these problems, and has a very important significance in a series of operations from coating removal to connection of optical fiber cores.

Note that the coating removing apparatus of the present invention is not limited to the above-described embodiment. In the above-described embodiment, the switch SW1 to the switch SW5 are switched by the switching unit 12 in the control circuit S. However, the control circuit may have any configuration as long as the mode of the heater can be switched. For example, the temperature sensors of the switches SW1 to SW5 may be separately provided, or a bimetal or the like may be used for these temperature sensors.

In addition to the above-described modes, by changing and adding circuits, other modes such as a mode in which the heater 10 is heated by an external power supply and a mode in which the rechargeable battery 13 is charged can be selectively executed. May be. further,
In the embodiment described above, the rechargeable battery 13 is controlled by the control circuit S
However, the rechargeable battery 13 may be arranged outside the control circuit S. Furthermore, in the above-described embodiment, the switches 10 are controlled to cause the heater 10 to generate heat by the external power supply 20 and the rechargeable battery 13 connected in parallel (SW1 → b ← SW2, SW3 → d, SW4 → d).
← SW5) It is also possible.

[0049]

According to the first aspect of the present invention, a high voltage (a voltage obtained by adding the voltage of the external power supply and the voltage of the rechargeable battery).
With the rapid heat generation mode in which the heater is heated by the above, a state suitable for performing the coating removal immediately after energization can be achieved, and a smooth coating removal operation can be performed. Also,
Once the state is suitable for removing the coating, the power consumption of the external power supply can be reduced by causing the heater to generate heat only with the rechargeable battery. For this reason,
When a battery or the like is used as an external power supply, the time during which work can be performed can be extended. Further, when the rechargeable battery is exhausted by causing the heater to generate heat, the rechargeable battery can be charged using the external power supply in the rechargeable battery charging mode, so that the operation can be continued smoothly.

According to the second aspect of the present invention, the external power supply heat generation mode in which the heater is heated only by the external power supply can be selectively executed. The work can also be continued in. In addition to using the rechargeable battery heat generation mode in addition to an emergency, it is possible to efficiently maintain the temperature of the heater in an optimum state while preventing the consumption of an external power supply. Furthermore, since the entire heater is planar, it can be disposed inside the heater without taking up space, which contributes to the reduction in the size of the entire coating removing apparatus.

According to the third or fourth aspect of the present invention, since the entire heater can be made thinner and smaller, it can be easily arranged in the coating removing apparatus. In addition, the entire heater can be easily formed into a planar shape, and can be arranged in a plane near the tip of the optical fiber, so that the tip of the coating portion of the optical fiber can be efficiently heated without causing a variation in the temperature distribution. Can be.

Furthermore, platinum-based resistors have the advantage that they have uniform properties such as resistance and are excellent in mass productivity, and the heat capacity of the heater itself can be reduced, so that the heat generated by the heater is used to heat the optical fiber immediately. There is also an advantage that it has excellent temperature control characteristics. In addition, since the resistors are arranged in a pattern, depending on the pattern design, the portion to be heated by the heater can be uniformly heated as a whole, or only a portion can be strongly heated. There is also an advantage that the degree of freedom of the temperature distribution at the time is high. In particular, according to the fourth aspect of the present invention, the heater can be made particularly thin, so that the heater can be designed without concern for the distance to the object to be heated and the difference in heat distribution.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an optical fiber core stripping apparatus according to the present invention.

FIG. 2 is a schematic view showing a state in which a coating portion of an optical cable is removed by the apparatus shown in FIG.

FIG. 3 is a circuit diagram (rapid heat generation mode) of the apparatus shown in FIG. 1;

FIG. 4 is a circuit diagram of the device shown in FIG. 1 (rechargeable battery heating mode).
It is.

FIG. 5 is a circuit diagram of the device shown in FIG. 1 (rechargeable battery charging mode).
It is.

FIG. 6 is a circuit diagram (external power supply heat generation mode) of the apparatus shown in FIG. 1;

7 is a perspective view showing a heater in the apparatus shown in FIG. 1, wherein (a) and (b) are of a ceramic substrate type, and (c)
Is a flexible substrate type.

FIG. 8 is a perspective view showing a use state of the device shown in FIG.

[Explanation of symbols]

F: optical fiber core, f0: optical fiber, f1: coating tip, 1: coating removing device, 10: heater, 11: temperature sensor, 12: switching unit, 2: fusion splicing device, 2
0: external power supply (battery), R: resistor, S: control circuit.

Claims (4)

[Claims] 1. An optical fiber stripping apparatus for exposing an optical fiber by heating and softening a coating section tip of an optical fiber core and exposing the optical fiber, a heater for heating the coating section tip, and the heater A rechargeable battery, and a control circuit for controlling a connection state between the heater, an external power supply, and the rechargeable battery, wherein the external power supply and the rechargeable battery are connected in series. A rapid heat generation mode in which the heater is rapidly heated by the rechargeable battery, a rechargeable battery heat generation mode in which the heater is heated only by the rechargeable battery, and a rechargeable battery charging mode in which the rechargeable battery is charged by the external power supply. An optical fiber core stripping apparatus which is selectively executed by the control circuit based on a detection result of a sensor. 2. The optical fiber stripping apparatus according to claim 1, wherein an external power generation mode in which the heater generates heat only by the external power is selectively executed. 3. The heater according to claim 1, wherein the heater is formed by patterning a platinum-based resistor on a ceramic substrate.
Or the coating removal device for optical fiber core wires according to item 2. 4. The optical fiber stripping apparatus according to claim 1, wherein the heater comprises a platinum-based resistor sandwiched between sheet-shaped resin substrates.