JPS6155644B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a decoating device for coated optical fibers.

[Prior Art and its Problems] In recent years, optical devices using optical fiber strands have been put into practical use. In such optical devices, the optical fiber strand is used as a part of the component, so it is necessary to expose a long strand of the optical fiber or remove only a part of the coating in the middle of the optical fiber. be.

Generally, in an optical fiber, as shown in the cross-sectional view in FIG.
This primary coat layer 2 is further covered with an outer skin 3. The primary coat layer 2 is usually made of silicone resin. The outer skin 3 is usually made of nylon.

Conventionally, a second process was used to remove the coating from the optical fiber.
There is a breakaway device as shown in the figure. Grooves 6 and 7 are provided on the opposing surfaces of two overlapping substrates 4 and 5, respectively, and the optical fiber core 8 is guided by the grooves 6 and 7, and the grooves are perpendicular to the direction of the grooves 6 and 7. Blades 9 and 10 are provided facing each other in the direction, and the outer skin 3 of the optical fiber core wire 8 is cut by aligning the blades 9 and 10 with each other. When removing the outer skin 3 of the optical fiber core 8, the optical fiber core 8 is moved in the direction of the arrow 11. However, the escaper shown in FIG. 2 has the following problems. Generally, the outer skin 3 tightens the primary coat layer 2, so the grooves 6 and 7 are
It is substantially difficult to cut the outer sheath 3 with the blades 9 and 10 provided perpendicularly to the direction and remove the outer sheath 3 from the entire circumference of the optical fiber core 8 at the same time. Therefore, when removing the outer skin 3 over a long portion, the outer skin 3 must be removed little by little. Also,
Such detachment can only be performed at the end of the optical fiber core 8, and it is extremely difficult to detach only a part of the optical fiber core 8 in the middle.

An example of a device that solves these problems is a secondary coating remover for optical fiber cores disclosed in Japanese Patent Application Laid-open No. 133404/1983. As shown in FIGS. 3a and 3b, a V-groove 16 is provided in the substrate 15, and a first blade 7 for cutting the outer skin 3 of the optical fiber core 8 is provided in the axial direction of the V-groove 16. There is. Further, the substrate 15 is provided with a presser plate 19 connected at its end by a coupler 18, and a second blade 20 is provided on the portion of the presser plate 19 facing the first blade 17. There is. A spring 21 is provided between the base plate 15 on the side where the coupler 18 is provided and the press plate 19, and normally the press plate 19 is in a state separated from the base plate 15 with the coupler 18 as an axis. There is. When in use, the optical fiber core 8 is placed on the V-groove 16, pressed down with a presser plate 19, and the outer skin 3 is removed by pulling the optical fiber core 8.

In such a secondary coating remover for optical fiber core wire, the first and second blades 17, 20 are in the V-groove 1.
Since they are provided in six directions, the problems of the stripping device shown in FIG. 2, such as not being able to easily strip the outer skin 3 and not being able to strip only a part of the optical fiber core 8, are solved. However, the coating remover shown in FIGS. 3a and 3b has the following new problem. First, at the first point, when the optical fiber core 8 is placed on the V-groove 16, the center of the optical fiber core 8 is located between the first and second blades 1, as shown in FIG.
If the optical fibers 7 and 20 are not on opposing lines, the position of the optical fiber core 8 will be extremely unstable. Therefore, when the optical fiber core 8 is held down by the holding plate 19, or when the outer sheath 3 is removed, the first or second blades 17, 20 may be broken. Further, when the outer skin 3 is pressed by the holding plate 19, the positions reached by the first and second blades 17 and 20 are not appropriate, making it difficult to remove the outer skin 3 in a good manner. Second
The point is that when the presser plate 19 is held down, the tips of the first and second blades 17 and 20 are parallel to the axis of the V-groove 16, and there are no blades in the direction of movement of the optical fiber core 8. Therefore, a considerably large force is required when moving the optical fiber core 8. For this reason, it is difficult to strip the optical fiber core 8 to a length of 10 cm or more.

Other problems include the difficulty of attaching the first or second blades 17, 20 to the V-groove 16 or the presser plate 19, and the large number of parts such as the spring 21 and the coupler 18.

[Object of the Invention] The object of the present invention has been made in consideration of the above-mentioned problems, and is to provide a method for easily removing the covering portion of a cored optical fiber over a long length or only in a part thereof, and with a high yield and workability. An object of the present invention is to provide an optical fiber decoating device that can remove the coating from an optical fiber.

[Summary of the Invention] The present invention provides an optical fiber having first and second substrates that are superimposed on each other, and a flat portion that is formed on each opposing surface of the first and second substrates and that is parallel to the opposing surface. first and second grooves that guide the optical fiber; and parallel to the opposing surfaces of the first and second grooves and facing each other at a predetermined angle with respect to the axial direction of the optical fiber. provided with first and second blades;
and a moving mechanism in which the second base moves in a direction perpendicular to the axis of the optical fiber and cuts the coating of the optical fiber using first and second blades. It is in.

[Effects of the Invention] According to the present invention, the first and second blades are opposed to each other in a straight line with the central axis of the optical fiber core interposed therebetween, and the relative movement mechanism of the first and second bases allows the first and second blades to Also, the second blade can be inserted into the outer skin while remaining in line with the central axis of the optical fiber core, and the outer skin can be cut with high precision. Further, since the first and second blades have a predetermined angle with respect to the central axis of the optical fiber, the optical fiber can be easily moved and the outer skin can be easily removed. As described above, according to the present invention, since the outer skin can be cut with high precision and easily removed, the covering portion of the optical fiber core can be extended over a long length and can be easily removed with good yield and workability.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 5 to 8.

FIG. 5 is a perspective view showing one embodiment, in which first and second base bodies 30 and 31 that guide the optical fiber core 8 to opposing surfaces 32 and 33 of first and second base bodies 30 and 31 are overlapped. grooves 34 and 35 are formed. The first and second grooves 34 and 35 have a first
and parallel to each opposing surface 32, 33 of the second base,
First and second blades 36 and 37 having a predetermined angle with respect to the axial direction of the optical fiber core 8 are provided. The first and second blades 36, 37 are
and one each for the second structure 34, 35, and are provided so as to face each other when the first and second base bodies 30, 31 are overlapped. The first and second base bodies 30 and 31 have a mechanism that moves relatively in a direction perpendicular to the axis of the optical fiber core wire 8 when polymerized, and this mechanism causes the first and second blades 36 , 37 approach and cut the outer skin 3 of the coated portion of the optical fiber core 8.

The first base body 30 is provided with first and second stoppers 38 and 39 of the second base body 31 . The first and second blades 36 and 37 described above are inclined so that one end in the direction of movement of the optical fiber core wire 8 protrudes from the other end. Next, the shapes of the first and second grooves 34 and 35 and the mechanism for relative movement of the first and second base bodies 30 and 31 will be explained in the sixth section.
This will be explained with reference to the drawings and FIG. First, the shape of the first and second structures 34 and 35 is a semi-ellipse shape with a flat part whose center part is parallel to the bonding surface of the first and second base bodies 30 and 31, as shown in the figure. It's summery. The reason for having such a flat part is to prevent the optical fiber core wire 8 from moving up and down when the first and second base bodies 30 and 31 are moved by the relative movement mechanism. 2 groove 3
The distance between the flat portions 4 and 35 is designed to be approximately equal to the diameter of the optical fiber core 8.

In addition, the semi-elliptic first and second grooves 34,
If the shapes of the ends in the installation direction of the first and second blades 36 and 37 of 35 are made to match the outer circumference of the optical fiber core 8, the shape of the optical fiber core 8 when cutting or detaching the outer skin 3 is reduced. Stability is further improved. When placing the optical fiber core 8 in the first and second grooves 34 and 35, the first and second grooves are arranged so that the optical fiber core 8 does not come into contact with the first and second blades 36 and 37. The base bodies 30 and 31 are overlapped as shown in FIG. For this purpose, the first or second blade 36 provided at one end of each of the first and second grooves 34, 35,
The distance between the tip of the optical fiber 37 and the other ends of the first and second grooves 34 and 35 is designed to be larger than the diameter of the optical fiber core wire 8. When cutting the outer skin 3 of the coated part of the optical fiber core 8, the second base 31
is moved by the above-mentioned moving mechanism, and as shown in FIG. 7, the first and second blades 36 and 37 are brought close to each other and inserted into the outer sheath 3 of the optical fiber core 8. In this case, when the first and second blades 36 and 37 reach the position where they cut the outer skin 3 of the optical fiber core 8, the movement of the second base body 31 is stopped by the first stopper 38. Note that the protruding widths of the first and second blades 36 and 37 from the ends of the first and second grooves 34 and 35 are set in advance to approximately match the thickness of the outer skin 3 of the optical fiber core wire 8. There is. After cutting the outer skin 3 of the optical fiber core 8, when removing the outer skin 3, move the optical fiber core 8 in the direction in which the first and second blades 36, 37 protrude in an inclined manner as described above. do.
In this case, the second base body 31 is connected to the second stopper 3
9, it is fixed so that it does not move.

As described above, in this embodiment, the outer skin 3 of the optical fiber core wire 8
First and second grooves 34 and 35 having flat portions are provided to prevent the optical fiber core 8 from moving up and down when cutting the optical fiber 8, and the first and second substrates 30, 31 is moved relatively, and the first and second blades 36 and 37, which are opposed to each other in a straight line with the center of the optical fiber core 8 interposed therebetween, are brought close to each other and touch the outer skin of the optical fiber core 8. It has a mechanism for biting. Therefore, the center of the optical fiber core 8 is arranged on the opposing line of the first and second blades 36 and 37, and also when cutting the outer skin 3 of the optical fiber core 8, the first and second blades 36, 37, it is in a very stable state and there is no risk of breaking the first or second blade when cutting the outer sheath 3 or removing the outer sheath 3, and the outer sheath on the center line of the optical fiber core 8 Since the outer skin 3 can be cut off, the outer skin 3 can be removed at a high yield as shown in FIG. After that, it is sufficient to cut the cut portion 40 of the outer skin 3. Furthermore, when removing a part of the outer sheath 3 in the middle of the optical fiber core wire, it is sufficient to cut it with the first and second blades 36 and 37 in the same manner as described above, and then cut both ends of the outer sheath 3 to be detached. .

Further, in this embodiment, the first and second blades 36, 3
7 each have a predetermined angle with respect to the central axis of the optical fiber core 8, so when moving the optical fiber core to remove the outer sheath 3, the outer sheath 3 can be easily removed without requiring much force. I can do it. Furthermore, this first
The angle of the second blade with respect to the central axis of the optical fiber core 8 only needs to be slightly inclined, but if it is in the range of 1° to 60°, it will not affect the force that moves the optical fiber core 8 or the outer skin 3. The force that causes the first and second blades to bite can be efficiently reduced.

Next, a first modification of the above embodiment will be explained with reference to FIG. 9. The modification shown in FIG. 9 is the fifth
The first part of the optical fiber stripping device shown in Figs.
And the second grooves 34, 35 are made into rectangular first and second grooves 45, 46. The bottoms of the rectangular first and second grooves 45 and 46 are connected to the first and second base bodies 30 and 3 as in FIGS. 5 to 7.
It is a flat part parallel to each opposing surface of 1. In this way, even if the first and second grooves 45 and 46 are rectangular, the same functions and effects as in the above embodiment can be achieved.

Furthermore, next, a second modification of the embodiment shown in FIGS. 5 to 7 will be described with reference to FIG. 10. In this modification, the first base 30 corresponds to the concave first base 50 and the second base 31 corresponds to the convex second base 51 in FIGS. One side wall surface of the inner wall of the base body 50 and the second side wall surface of the inner wall of the base body 50
is installed so that the one side wall surface of the protrusion of the base body 51 overlaps with the one side wall surface of the protrusion. This first and second base 5
0 and 51 are provided with first and second grooves 34 and 35 similar to those in the above embodiment.
Although not shown in the figure, the axial ends of the first and second grooves 34 and 35 on the side into which the optical fiber is inserted are tapered to facilitate the introduction of the optical fiber. is provided.

A first spring 52 and a second spring 53 are provided between the first base body 50 and the second base body 51 except for the overlapping portion thereof. Further, the first stopper 38 in the above embodiment corresponds to the first stopper 51 at the end of the first base body, and similarly, the second stopper 39 corresponds to the first stopper 51 at the end of the first base body 50. Second stopper 5 provided on the drawer surface
It corresponds to 5.

When removing the coating of the optical fiber using the structure described above, the first and second grooves 34, 3
After passing the optical fiber core wire 8 through the second base body 5
All you have to do is push down and pull the optical fiber core 8. In this manner, the coating of the optical fiber can be easily removed.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cross-sectional view of an optical fiber core wire;
2 to 4 show a conventional example, FIG. 5 to 8 show an embodiment of the present invention, and FIG. 9 shows a diagram of an embodiment shown in FIGS. 5 to 8. FIG. 10 is a diagram showing a second modification of the embodiment shown in FIGS. 5 to 8. FIG. DESCRIPTION OF SYMBOLS 1... Optical fiber raw wire, 2... Primary coat layer, 3... Outer skin, 8... Optical fiber core wire, 3
0,50...First base body, 31,51...Second base body, 32,33...Opposing surface, 34,45...First groove, 35,46...Second groove, 36... …First
blade, 37... second blade, 38, 54... first stopper, 39, 55... second stopper,
40... Cutting section.

Claims (1)

[Scope of Claims] 1. An optical fiber core having first and second base bodies superimposed on each other, and a flat portion formed on each opposing surface of the first and second base bodies and parallel to the opposing surfaces. first and second grooves for guiding the optical fiber; moving first and second blades, which are provided to face each other at a predetermined angle with respect to the direction, and the first and second base bodies in a direction perpendicular to the axis of the optical fiber core; An optical fiber sheath stripping device, further comprising a moving mechanism for making incisions in the sheathing portion of the optical fiber core with the first and second blades. 2. Claim 1, characterized in that the first or second base body has a stopper for the first and second blades to cut only into the coated portion of the optical fiber core wire. Optical fiber stripping device. 3. Claims characterized in that the first or second base body has a stopper for preventing the first and second base bodies from moving relative to each other in the axial direction of the optical fiber core wire. 2. The optical fiber sheath stripping device according to item 1. 4. The optical fiber sheath remover according to claim 1, wherein the first and second grooves have the same shape. 5. The optical fiber sheath remover according to claim 1, wherein the first or second groove is semi-elliptical. 6. The optical fiber sheath remover according to claim 1, wherein the first or second groove has a rectangular shape. 7. Each end of the first or second groove in the direction in which the first or second blade is provided substantially coincides with a part of the outer peripheral surface of the optical fiber core wire. The optical fiber decoating device according to scope 1. 8. Claim 1, wherein the protrusion width of the first and second blades from the ends of the first and second grooves substantially matches the thickness of the coating portion of the optical fiber core wire. Optical fiber sheath stripping device described in . 9. The optical fiber coating according to claim 1, wherein the axial ends of the first and second grooves are provided with tapers for introducing the optical fiber core wire. Escape device.