JP6809806B2 - How to set the optical fiber tape core wire and the optical fiber tape core wire to the optical fiber holding member - Google Patents

Description

An optical fiber cable for transmitting a large amount of data at high speed has an optical fiber tape core wire in which multiple optical fiber strands are arranged in parallel and bonded to each other for storage in the cable and simplification of work. It is used.

In order to increase the diameter and density of the optical fiber cable, it is preferable that the optical fiber tape core wire can be flexibly deformed in the cross section of the cable. As such an optical fiber tape core wire, an optical fiber tape having a structure in which adjacent optical fiber strands are intermittently connected to each other and the connecting portions do not overlap in the tape width direction but are separated in the tape longitudinal direction. A core wire has been proposed (for example, Patent Document 1).

Since such an optical fiber tape core wire can be flexibly deformed (rolled and folded), it is effective for reducing the diameter and increasing the density of the cable. In addition, single-core separability and batch fusion splicability are also improved.

On the other hand, as a method of connecting the optical fiber tape core wires, a batch fusion splicing may be used. A method is known in which a connecting portion of an optical fiber wire to be connected is discharged by an electrode to be melted, and both ends of the optical fiber wire are connected in a softened state and then fused by cooling (for example). Patent Document 2).

JP-A-2007-279226 Japanese Unexamined Patent Publication No. 2004-184543

Fusion of optical fiber tape core wires using a general fusion splicer is performed by the following procedure. First, the optical fiber holding members on which the optical fiber tape core wires are set face each other and are set in the fusion splicer. At the tip of the optical fiber tape core wire, the resin coating of each optical fiber wire is peeled off by a predetermined length, and the glass fiber is exposed.

Next, when the windshield cover of the fusion splicer is closed, the respective optical fiber holding members approach each other. As a result, the respective optical fiber strands (glass fibers) arranged so as to face each other are butted against each other.

In this state, the ends of the optical fiber strands arranged opposite to each other are melted by electric discharge. Further, the optical fiber strands facing each other are slightly pushed in with the ends melted, and the two are fused and connected. As described above, the optical fiber strands of the pair of optical fiber tape core wires are fused and connected to each other.

Here, in the case of an optical fiber tape core wire in which optical fiber strands are collectively coated, no problem occurs during fusion splicing, but the above-mentioned intermittently bonded optical fiber tape core wire (intermittent tape core wire) Then, the connection loss may increase.

The inventors have found that one of the causes is the bending of the optical fiber wires when the optical fiber wires are butted against each other and pushed in. That is, in the case of the intermittent tape core wire, the bending of the optical fiber wire may increase when the optical fiber wire is moved. As a result, it was found that the cause was that the tip of the optical fiber wire did not move to the specified position or the optical fiber wires were not sufficiently pushed into each other.

The present invention has been made in view of such a problem, such as a structure for holding an optical fiber tape core wire having a small connection loss by preventing the optical fiber wire from bending when the intermittent tape core wires are fused and connected to each other. The purpose is to provide.

In order to achieve the above-mentioned object, the first invention is a method of setting an optical fiber tape core wire on an optical fiber holding member. In the optical fiber tape core wire, adjacent optical fiber strands are bonded to each other. The bonded portions are formed in a staggered pattern at predetermined intervals in the longitudinal direction of the optical fiber tape core wire, and the optical fiber holding member includes a main body portion on which the optical fiber tape core wire is arranged and the main body. A lid portion that can be opened and closed and a holding member that is provided on the inner surface of the lid portion and presses the optical fiber tape core wire are provided, and the optical fiber tape core wire is arranged on the main body portion. In a state where the lid portion is closed and the optical fiber tape core wire is pressed by the pressing member, all the optical fiber strands are at least in the width direction of the optical fiber tape core wire at the most advanced portion of the pressing member. At least between the most advanced portion of the holding member and the glass fiber from which the covering portion of the optical fiber wire is removed, while being adhered to one adjacent other optical fiber wire at the bonding portion. In a part, in the width direction of the optical fiber tape core wire, all the optical fiber strands are bonded to at least one adjacent other optical fiber strands at the adhesive portion, and the holding member All the bonded portions from the most advanced portion to the glass fiber from which the coating portion of the optical fiber wire is removed are continuous in the longitudinal direction, and the optical fiber tape core wire is the optical fiber tape core wire. To grasp the first range of the optical fiber tape core wire in which all the optical fiber strands are bonded to at least one adjacent other optical fiber strands at the bonding portion in the width direction of. A mark is provided on the outer surface of at least a part of the first range of the optical fiber wire, and when the optical fiber tape core wire is pressed by the pressing member, the mark is the tip of the pressing member. An optical fiber tape core wire characterized in that the optical fiber tape core wire is set on the optical fiber holding member so as to be located between the optical fiber and the glass fiber from which the coating portion of the optical fiber wire is removed . This is a method of setting on an optical fiber holding member .

The second invention is a method of setting an optical fiber tape core wire on an optical fiber holding member. In the optical fiber tape core wire, adjacent optical fiber strands are bonded to each other at an adhesive portion, and the adhesive portion is formed. Is formed in a staggered manner at predetermined intervals in the longitudinal direction of the optical fiber tape core wire, and the optical fiber holding member includes a main body portion on which the optical fiber tape core wire is arranged and a lid portion that can be opened and closed on the main body portion. And a pressing member provided on the inner surface of the lid portion to press the optical fiber tape core wire, the optical fiber tape core wire is arranged on the main body portion, the lid portion is closed, and the pressing member is provided. In a state where the optical fiber tape core wire is pressed by the member, all the optical fiber strands are at least one adjacent other said above in the width direction of the optical fiber tape core wire at the most advanced portion of the pressing member. The optical fiber is adhered to the optical fiber wire at the bonding portion, and at least a part between the most advanced portion of the holding member and the glass fiber from which the coating portion of the optical fiber wire is removed is the optical fiber. In the width direction of the tape core wire, all the optical fiber strands are bonded to at least one adjacent other optical fiber strands at the bonding portion, and the light from the most advanced portion of the holding member. All the adhesive portions up to the glass fiber from which the coating portion of the fiber wire is removed are continuous in the longitudinal direction, and the optical fiber tape core wire is at least one in the width direction of the optical fiber tape core wire. The mark on the optical fiber wire that allows the second range of the optical fiber tape core wire to be grasped is that the optical fiber wire of the portion is not adhered to the other adjacent optical fiber wires. The optical fiber tape core wire is provided on at least a part of the outer surface of the second range so that when the optical fiber tape core wire is pressed by the pressing member, the mark is completely hidden by the pressing member. This is a method of setting an optical fiber tape core wire on an optical fiber holding member, which comprises setting the optical fiber tape core wire on the optical fiber holding member .

According to the first or second invention, the optical fiber strands alone extend over the entire length from the most advanced portion of the holding member of the optical fiber holding member to the glass fiber from which the coating portion of the optical fiber strands is removed. Will not be placed. Therefore, it is possible to reduce the part where the rigidity of the optical fiber wire is weak, and it is possible to suppress the bending of the optical fiber wire at this part. As a result, when the optical fiber strands are connected to each other, it is possible to suppress shaft misalignment due to bending of the optical fiber strands.

In particular, the effect is great if all the optical fiber strands are bonded to other adjacent optical fiber strands at the adhesive portion with respect to the total length from the most advanced portion of the holding member to the glass fiber. ..

Further, in particular, according to the first invention, it is easy to provide a mark capable of grasping the position where all the optical fiber strands are adhered to other adjacent optical fiber strands at the adhesive portion. In addition, the adhesive portion can be positioned between the tip of the pressing member and the glass fiber.

Further , in particular, according to the second invention, it is possible to grasp the position where at least a part of the optical fiber strands form a non-adhesive portion that is not adhered to other adjacent optical fiber strands. By providing the above, the adhesive portion can be easily positioned between the tip of the pressing member and the glass fiber.

The third invention is an optical fiber tape core wire in which a plurality of optical fiber strands are arranged in parallel, and adjacent optical fiber strands are bonded to each other at an adhesive portion, and the adhesive portion is the optical fiber tape core wire. are formed at predetermined intervals in the longitudinal direction, the width direction of the optical fiber ribbon, all of the optical fiber is bonded at the other of said optical fiber adjacent the bonding portion, the optical fiber mark capable of grasping the first range of ribbon is in the optical fiber ribbon, characterized in that provided on at least a portion of the outer surface of said first range of said optical fiber is there.
The fourth invention is an optical fiber tape core wire in which a plurality of optical fiber strands are arranged in parallel, and adjacent optical fiber strands are bonded to each other at an adhesive portion, and the adhesive portion is the optical fiber tape core wire. An optical fiber tape core formed at predetermined intervals in the longitudinal direction, in which at least a part of the optical fiber strands is not adhered to other adjacent optical fiber strands in the width direction of the optical fiber tape core wire. The optical fiber tape core wire is characterized in that a mark capable of grasping the second range of the wire is provided on the outer surface of at least a part of the second range of the optical fiber wire.

The fifth invention is an optical fiber tape core wire in which a plurality of optical fiber strands are arranged in parallel, and adjacent optical fiber strands are bonded to each other at an adhesive portion, and the adhesive portion is the optical fiber tape core wire. are formed at predetermined intervals in the longitudinal direction, the width direction of the optical fiber ribbon, all of the optical fiber is bonded at the other of said optical fiber adjacent the bonding portion, the optical fiber mark capable of grasping the first range of ribbon is provided on at least a portion of the outer surface of the first range of the optical fiber, the bonding portion, a pair of adjacent said light The fiber strands are bonded to each other, and the adhesive portions adjacent to each other in the width direction of the optical fiber tape core wire are formed in a staggered pattern in the longitudinal direction of the optical fiber tape core wire, and the mark is the mark of the optical fiber tape core wire. an optical fiber ribbon, characterized in that shows the range of the bonding portion to the optical fiber at both ends in the width direction is formed.
The sixth invention is an optical fiber tape core wire in which a plurality of optical fiber strands are arranged in parallel, and adjacent optical fiber strands are bonded to each other at an adhesive portion, and the adhesive portion is the optical fiber tape core wire. An optical fiber tape core formed at predetermined intervals in the longitudinal direction, in which at least a part of the optical fiber strands is not adhered to other adjacent optical fiber strands in the width direction of the optical fiber tape core wire. A mark capable of grasping the second range of the wire is provided on the outer surface of at least a part of the second range of the optical fiber wire, and the bonding portion is a pair of adjacent optical fiber wires. The wires are bonded to each other, and the adhesive portions adjacent to each other in the width direction of the optical fiber tape core wire are formed in a staggered pattern in the longitudinal direction of the optical fiber tape core wire, and the mark is in the width direction of the optical fiber tape core wire. The optical fiber tape core wire is characterized in that the adhesive portion is not formed on the optical fiber strands at both ends thereof and the non-adhesive portion is formed.

According to any one of the third to sixth inventions , the position of the optical fiber tape core wire pressed by the pressing member can be easily grasped when the optical fiber holding member is set. Therefore, the adhesive portion can be easily positioned between the tip of the pressing member and the glass fiber.

According to the fifth or sixth invention, since the adhesive portions are arranged in a staggered pattern, the optical fiber tape core wire can be reliably deformed (rolled or folded) flexibly (rolled or folded), and the cable has a small diameter and high density. It is also effective for conversion.

According to the present invention, it is possible to provide a structure for holding an optical fiber tape core wire having a small connection loss by preventing the optical fiber wire from bending when the intermittent tape core wires are fused and connected to each other.

The plan view which shows the optical fiber holding member 10. The perspective view which shows the optical fiber tape core wire 11. The plan view which shows the state which arranged the optical fiber tape core wire 11 on the optical fiber holding member 10. In the figure which shows the position of the pressing part 17, (a) shows the other optical fiber elements in which all the optical fiber strands are adjacent to each other with respect to the total length from the tip end portion of the pressing portion 17 to the glass fiber 19. In the figure (b) showing a state in which the wire and the adhesive portion 15 are adhered to each other, some optical fiber strands are adjacent to the total length from the most advanced portion of the pressing portion 17 to the glass fiber 19. The figure which shows the state which is not bonded with the other optical fiber wire which fits with the adhesive part 15 is shown in FIG. The figure which shows the state which the optical fiber wire is bonded with another adjacent optical fiber wire by the adhesive part 15. In the figure which shows the position of the pressing part 17, (a) is a figure which shows the state which a mark 21 is provided, (b) is a figure which shows the state which a mark 21a is provided, (c) is the figure which shows the mark 21b. The figure which shows the state in which 21c is provided. The figure which shows the method of connecting the optical fiber tape core wire 11 and measuring the loss of the connection part. (A) is a diagram showing an optical fiber holding structure 30a, (b) is a diagram showing an optical fiber holding structure 30b, (c) is a diagram showing an optical fiber holding structure 30c, and (d) is a diagram showing an optical fiber holding structure 30c. The figure which shows the structure 30d. (A) is a diagram showing an optical fiber holding structure 30e, (b) is a diagram showing an optical fiber holding structure 30f, (c) is a diagram showing an optical fiber holding structure 30g, and (d) is a diagram showing an optical fiber holding structure 30g. The figure which shows the structure 30h.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an optical fiber holding member 10. The optical fiber holding member 10 includes a main body portion 1, a lid portion 3, a pressing member 7, and the like.

The main body 1 is a portion where the optical fiber tape core wire is arranged, and is a member of a substantially rectangular parallelepiped. A groove 5 in which the optical fiber tape core wire is arranged is formed on the upper surface of the main body 1 (the surface facing the lid 3). Further, a lid portion 3 that can be opened and closed by a hinge is provided on one side of the main body portion 1 in the width direction.

The main body 1 and the lid 3 are made of metal, for example. A magnet 9 is arranged on the surface of the main body 1 facing the lid 3. When the lid portion 3 is closed, the magnet 9 can maintain the lid portion 3 in a closed state with respect to the main body portion 1. The lid portion 3 is adjusted so that the back surface of the lid portion 3 and the upper surface of the main body portion 1 are substantially parallel in the closed state.

A pressing member 7 is formed on the inner surface of the lid portion 3 (the surface facing the main body portion 1) in the longitudinal direction. The pressing member 7 projects by a predetermined amount from the inner surface of the lid portion 3. The pressing member 7 is a member that presses and holds the optical fiber tape core wire arranged on the main body 1. The pressing member 7 is made of resin, for example, and is made of a member that does not damage the optical fiber tape core wire.

Next, the optical fiber tape core wire 11 will be described. FIG. 2 is a perspective view showing the optical fiber tape core wire 11. The optical fiber tape core wire 11 is configured by bonding a plurality of optical fiber strands 13a, 13b, 13c, and 13d in parallel. In the following description, an example composed of four optical fiber strands 13a, 13b, 13c, and 13d will be shown, but the present invention is not limited to this, and an optical fiber tape core composed of a plurality of optical fiber strands is shown. It is applicable if it is a line.

In the optical fiber tape core wire 11, adjacent optical fiber strands 13a, 13b, 13c, and 13d are intermittently bonded to each other by the bonding portion 15 at predetermined intervals. That is, in the optical fiber tape core wire 11, adjacent optical fiber strands 13a, 13b, 13c, 13d are adhered to each other by an adhesive portion 15, and the adhesive portion 15 is predetermined in the longitudinal direction of the optical fiber tape core wire 11. Formed at intervals.

Further, the adhesive portions 15 adjacent to each other in the width direction of the optical fiber tape core wire 11 are arranged so as to be offset from the longitudinal direction of the optical fiber tape core wire 11. That is, the adhesive portion 15 adheres a pair of adjacent optical fiber strands to each other, and the adhesive portions 15 adjacent to each other in the width direction of the optical fiber tape core wire 11 are staggered with each other in the longitudinal direction of the optical fiber tape core wire 11. Is formed in.

For example, the adhesive portion 15 between the optical fiber strands 13b and 13c has the optical fiber tape core wire 11 with respect to the adhesive portion 15 between the adjacent optical fiber strands 13a and 13b and between the optical fiber strands 13c and 13d. It is formed at the same pitch with a deviation of approximately half a pitch with respect to the longitudinal direction. Therefore, the bonding position between the optical fiber strands 13a and 13b and the bonding position between the optical fiber strands 13c and 13d are the same.

The position of the adhesive portion 15 is not limited to the illustrated example, and may not be staggered as long as the adhesive portion 15 is formed intermittently in the longitudinal direction. However, it is desirable that the positions of the adhesive portions 15 of the pair of optical fiber strands at both ends (optical fiber strands 13a and 13b and optical fiber strands 13c and 13d) overlap each other.

Next, a method of setting the optical fiber tape core wire 11 on the optical fiber holding member 10 will be described. FIG. 3 is a plan view (perspective view of the lid portion 3) showing a state in which the optical fiber tape core wire 11 is arranged on the optical fiber holding member 10 and the lid portion 3 is closed. The optical fiber tape core wire 11 is arranged along the groove 5 of the main body 1. When the lid portion 3 is closed, the optical fiber tape core wire 11 is pressed by the pressing member 7 of the lid portion 3.

In this state, the resin coating portion of the optical fiber tape core wire 11 (each optical fiber strand) protruding from the tip end side of the optical fiber holding member 10 is peeled off and removed to expose the glass fiber 19. Further, the tip of the glass fiber 19 is cut to a predetermined length. The pair of optical fiber holding structures thus obtained are arranged in the fusion splicer so as to face each other, and fusion splicing is performed.

The position pressed by the pressing member 7 of the optical fiber tape core wire 11 is defined as the pressing portion 17. Further, in each optical fiber strand, a portion (other than the adhesive portion 15) that is not adhered to other adjacent optical fiber strands is defined as a non-adhesive portion.

Next, the optical fiber holding structure in which the optical fiber tape core wire 11 is held by the optical fiber holding member 10 will be described in detail. FIG. 4A is a diagram showing an optical fiber holding structure 20. In the following figure, the optical fiber tape core wire 11 is arranged in the main body portion 1 (groove 5), the lid portion 3 is closed, and the optical fiber tape core wire 11 is pressed by the pressing member 7. , The illustration of the optical fiber holding member 10 is omitted.

In the present embodiment, light is applied to the entire length between the most advanced portion of the pressing portion 17 (pressing member 7) and the glass fiber 19 from which the coating portion of each optical fiber wire is removed (range A in the figure). In the width direction of the fiber tape core wire 11, all the optical fiber strands are bonded to other adjacent optical fiber strands at the bonding portion 15.

Specifically, in the range A in the figure, the optical fiber wire 13a and the optical fiber wire 13b are bonded to each other over the entire length, and the optical fiber wire 13c and the optical fiber wire 13d are bonded to each other. That is, in the range A in the figure, each optical fiber wire does not exist independently.

By determining the position of the pressing portion 17 in this way, the rigidity of each optical fiber strand can be increased at least in the range A in the drawing. Therefore, it is possible to suppress the bending of each optical fiber strand.

On the other hand, FIG. 4B is a diagram showing an optical fiber holding structure 20a. In the optical fiber holding structure 20a, with respect to the total length between the most advanced portion of the pressing portion 17 (pressing member 7) and the glass fiber 19 from which the coating portion of each optical fiber wire is removed (range B in the figure). In the width direction of the optical fiber tape core wire 11, at least a part of the optical fiber wires 13a and 13d are not bonded to the other adjacent optical fiber wires 13b and 13c at the bonding portion 15.

Specifically, in the range B in the drawing, the optical fiber strands 13b and the optical fiber strands 13c are adhered to each other over the entire length, and the optical fiber strands 13a and 13d are adhered to the adjacent optical fiber strands. Exists alone without.

When the position of the pressing portion 17 is determined in this way, in the range B in the drawing, the optical fiber wires 13a and 13d are bonded to the adjacent optical fiber wires 13b and 13c, as compared with the case where the optical fiber wires 13a and 13c are adhered to each other. The rigidity of the lines 13a and 13d is reduced. For this reason, the optical fiber strands 13a and 13d tend to bend, and there is a possibility that the axial deviation and the pushing of the optical fiber strands into each other at the time of the fusion connection described above become insufficient. As a result, the connection loss of the connection portion may increase.

In the present invention, the optical fiber holding structure 20b shown in FIG. 4C may be used. The optical fiber holding structure 20b is in the width direction of the optical fiber tape core wire 11 with respect to at least a part (range C in the drawing) between the most advanced portion of the pressing portion 17 (pressing member 7) and the glass fiber 19. Then, all the optical fiber strands are bonded to the other adjacent optical fiber strands at the bonding portion 15.

Specifically, in the range C in the figure, the optical fiber wire 13a and the optical fiber wire 13b are bonded, and the optical fiber wire 13c and the optical fiber wire 13d are bonded. That is, in the range C in the figure, each optical fiber wire does not exist independently.

In this case, the optical fiber wire 13a is partially between the most advanced portion of the pressing portion 17 (holding member 7) and the glass fiber 19 from which the coating portion of each optical fiber wire is removed. , 13d exist independently without being adhered to adjacent optical fiber strands. However, even in this case, the rigidity of each optical fiber strand can be increased at least in the range C in the drawing. Therefore, the bending of each optical fiber wire can be suppressed as compared with the optical fiber holding structure 20a.

As described above, according to the present embodiment, when the optical fiber tape core wire 11 is set on the optical fiber holding member 10, at least between the most advanced portion of the pressing portion 17 (pressing member 7) and the glass fiber 19 In some cases, at least one of the adjacent optical fiber strands is bonded. Therefore, it is possible to prevent the rigidity of the tip of each optical fiber strand exposed from the portion pressed by the pressing member 7 from being lowered. Therefore, it is possible to suppress the bending of the optical fiber strands when the optical fiber tape cores are connected to each other. As a result, it is possible to suppress an increase in connection loss of the connection portion due to misalignment of the optical fiber strands and insufficient pressing.

In particular, the effect of suppressing bending is great because the optical fiber strands adjacent to at least one of them are adhered to the total length between the most advanced portion of the pressing portion 17 (pressing member 7) and the glass fiber 19. ..

(Second Embodiment)
Next, the second embodiment will be described. FIG. 5A is a diagram showing an optical fiber holding structure 20c. In the following description, the configurations that perform the same functions as those of the first embodiment are designated by the same reference numerals as those in FIGS. 1 to 4, and duplicate description will be omitted.

In the present embodiment, the mark 21 (hatched portion in the drawing) is provided on the optical fiber tape core wire 11. The mark 21 is provided on the outer surface of the optical fiber strands 13a, 13b, 13c, 13d.

The mark 21 is a portion in the width direction of the optical fiber tape core wire 11 where at least some of the optical fiber strands 13a and 13d are not bonded to the other adjacent optical fiber strands 13b and 13c at the adhesive portion 15. Provided. Therefore, the mark 21 makes it possible to grasp the position (range) in the longitudinal direction in which a part of the optical fiber strands of the optical fiber tape core wire 11 exists independently. Specifically, the mark 21 indicates a range in which the adhesive portion 15 is not formed on the optical fiber strands 13a and 13d at both ends in the width direction of the optical fiber tape core wire 11 and the non-adhesive portion is formed. is there.

By closing the lid 3 and setting the optical fiber tape core wire 11 on the optical fiber holding member 10 so that the mark 21 is completely hidden by the holding member 7, the optical fiber is formed. A holding structure 20c can be obtained.

As described above, the optical fiber holding structure 20c has all the optical fiber strands 13a in the width direction of the optical fiber tape core wire 11 with respect to the total length between the most advanced portion of the holding member 7 and the glass fiber 19. , 13b, 13c, 13d are bonded to at least one of the other adjacent optical fiber strands 13a, 13b, 13c, 13d at the bonding portion 15. That is, each optical fiber strand does not exist independently with respect to the total length between the most advanced portion of the pressing member 7 and the glass fiber 19.

In the illustrated example, the mark 21 is formed in a range in which the optical fiber strands 13a and 13b and the optical fiber strands 13c and 13d are not adhered to each other, but the present invention is not limited to this. A part of the mark 21 may slightly hang on the adhesive portion 15 of the optical fiber strands 13a and 13b and the adhesive portion 15 of the optical fiber strands 13c and 13d. By doing so, even if the end position of the pressing member 7 and the end position of the lid portion 3 are different, the mark 21 is completely hidden by the lid portion 3, and the same optical fiber is used. A holding structure 20c can be obtained.

Further, the optical fiber is formed by making the formation range of the mark 21 line-symmetrical with respect to the center line in the longitudinal direction of the adhesive portion 15 of the optical fiber strands 13a and 13b and the adhesive portion 15 of the optical fiber strands 13c and 13d. A similar optical fiber holding structure 20c can be obtained even when the tape core wire 11 is inverted and used.

As described above, according to the optical fiber holding structure 20c, when the optical fiber tape core wire 11 is pressed by the pressing member 7, the mark 21 is completely hidden by the pressing member 7, so that the optical fiber tape core wire 11 is illuminated. It can be easily set on the fiber holding member 10.

The mark formation range is not limited to the example shown in FIG. 5 (a). For example, as in the optical fiber holding structure 20d shown in FIG. 5B, the optical fiber tape core wire 11 may be provided with a mark 21a (hatched portion in the drawing) instead of the mark 21. The mark 21a is provided on the outer surface of the optical fiber strands 13a, 13b, 13c, 13d.

The mark 21a indicates that all the optical fiber strands 13a, 13b, 13c, 13d are adhered to at least one of the other adjacent optical fiber strands 13a, 13b, 13c, 13d in the width direction of the optical fiber tape core wire 11. It is provided at the portion bonded by the portion 15. Therefore, it is possible to grasp the position (range) in the longitudinal direction in which each optical fiber strand of the optical fiber tape core wire 11 does not exist independently by the mark 21a. Specifically, the mark 21a indicates a range in which the adhesive portion 15 is formed on the optical fiber strands 13a and 13d at both ends in the width direction of the optical fiber tape core wire 11.

The lid 3 is closed so that the mark 21a of the optical fiber tape core wire 11 is located between the tip of the holding member 7 and the glass fiber 19, and the optical fiber tape core wire 11 is held by the optical fiber holding member 10. By setting to, the optical fiber holding structure 20d can be obtained.

As described above, the optical fiber holding structure 20d has all the optical fiber strands 13a in the width direction of the optical fiber tape core wire 11 with respect to the total length between the most advanced portion of the holding member 7 and the glass fiber 19. , 13b, 13c, 13d are bonded to at least one of the other adjacent optical fiber strands 13a, 13b, 13c, 13d at the bonding portion 15. That is, each optical fiber strand does not exist independently with respect to the total length between the most advanced portion of the pressing member 7 and the glass fiber 19.

Similar to the mark 21, the formation range of the mark 21a is axisymmetric with respect to the center line in the longitudinal direction of the bonding portion 15 of the optical fiber strands 13a and 13b and the bonding portion 15 of the optical fiber strands 13c and 13d. By doing so, the same optical fiber holding structure 20d can be obtained even when the optical fiber tape core wire 11 is inverted and used.

As described above, according to the optical fiber holding structure 20d, when the optical fiber tape core wire 11 is pressed by the pressing member 7, the mark 21a is exposed between the pressing member 7 and the glass fiber 19, so that the optical fiber tape is exposed. The core wire 11 can be easily set on the optical fiber holding member 10.

Further, the mark formation range is not limited to the examples shown in FIGS. 5 (a) and 5 (b). For example, as in the optical fiber holding structure 20e shown in FIG. 5C, line-shaped marks 21b and 21c may be provided on the optical fiber tape core wire 11 instead of the marks 21 and 21a indicating the range. The marks 21b and 21c are linearly provided on the outer surfaces of the optical fiber strands 13a, 13b, 13c and 13d in the width direction.

Although the mark 21b and the mark 21c are distinguished by the number of lines, it is sufficient that the mark 21b and the mark 21c can be easily distinguished from each other by the color and thickness of the lines.

The mark 21b is a portion in the width direction of the optical fiber tape core wire 11 where at least some of the optical fiber strands 13a and 13d are not bonded to the other adjacent optical fiber strands 13b and 13c at the adhesive portion 15. Provided at the end in the longitudinal direction. Therefore, it is possible to grasp the position (range) in the longitudinal direction in which a part of the optical fiber strands of the optical fiber tape core wire 11 independently exists by the mark 21b. Specifically, the mark 21b indicates a range in which the adhesive portion 15 is not formed on the optical fiber strands 13a and 13d at both ends of the optical fiber tape core wire 11 in the width direction and the non-adhesive portion is formed. is there.

Further, the mark 21c indicates that in the width direction of the optical fiber tape core wire 11, all the optical fiber strands 13a, 13b, 13c, 13d are at least one of the other adjacent optical fiber strands 13a, 13b, 13c, 13d. It is provided at a portion where the light and the adhesive portion 15 are adhered to each other. Therefore, the mark 21c makes it possible to grasp the position (range) in the longitudinal direction in which each optical fiber strand of the optical fiber tape core wire 11 does not exist independently. Specifically, the mark 21c is formed at, for example, the center in the longitudinal direction at the bonding portions 15 of the optical fiber strands 13a and 13d at both ends in the width direction of the optical fiber tape core wire 11.

The lid 3 is closed so that the mark 21b is completely hidden by the pressing member 7 and the mark 21c is located between the tip of the pressing member 7 and the glass fiber 19 so that the optical fiber tape core wire 11 is covered with light. By setting the fiber tape core wire 11 on the optical fiber holding member 10, the optical fiber holding structure 20e can be obtained.

As described above, in the optical fiber holding structure 20e, all the optical fiber strands 13a are formed in the width direction of the optical fiber tape core wire 11 with respect to the total length between the most advanced portion of the holding member 7 and the glass fiber 19. , 13b, 13c, 13d are bonded to at least one of the other adjacent optical fiber strands 13a, 13b, 13c, 13d at the bonding portion 15. That is, each optical fiber strand does not exist independently with respect to the total length between the most advanced portion of the pressing member 7 and the glass fiber 19.

Similar to the mark 21, the formation position of the mark 21b with respect to the center line (mark 21c) in the longitudinal direction of the bonding portion 15 of the optical fiber strands 13a and 13b and the bonding portion 15 of the optical fiber strands 13c and 13d. By making the optical fiber tape core wire 11 inverted, the same optical fiber holding structure 20e can be obtained.

As described above, according to the optical fiber holding structure 20e, when the optical fiber tape core wire 11 is pressed by the pressing member 7, the mark 21b is completely hidden by the pressing member 7, and the mark 21c is between the pressing member 7 and the glass fiber 19. By exposing the optical fiber tape core wire 11, the optical fiber tape core wire 11 can be easily set on the optical fiber holding member 10.

Next, the optical fiber tape core wires were fused and connected to each other using each optical fiber holding structure, and the connection loss of the connection portion was evaluated. As the optical fiber tape core wire 11, an 8-core intermittent tape core wire having a diameter of 0.25 mm was used. The adhesive portion was formed in a staggered pattern as shown in FIG. 2 and the like.

The optical fiber tape core wire 11 was held by a commercially available optical fiber holding member to obtain an optical fiber holding structure. At this time, various optical fiber holding structures were obtained by changing the positional relationship between the holding member of the optical fiber holding member and the adhesive portion. The details of the optical fiber holding structure will be described later.

The resin coating at the tip of the obtained optical fiber holding structure was removed to expose the glass fiber, and the glass fiber was cut to a predetermined length. A pair of optical fiber holding structures were set in a commercially available fusion splicer, and fusion splicing was performed.

FIG. 6 is a diagram showing a method of measuring the connection loss of the connection portion. Light was incident on the optical fiber tape core wire 11 after fusion splicing using an OTDR (Optical Time Domain Reflectometer) from one end, and the loss of the connecting portion 23 was measured from the reflected light.

7 (a) to 7 (d) are views showing each optical fiber holding structure used for the test. In the optical fiber holding structure 30a shown in FIG. 7A, the pressing portion 17 has an adhesive portion 15 of the optical fiber strands 13a and 13b, an adhesive portion 15 of the optical fiber strands 13c and 13d, and an optical fiber strand 13e. , 13f, and the optical fiber strands 13g, 13h are located at the adhesive portion 15. Further, with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19, all the optical fiber strands 13a to 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11. It is bonded to the optical fiber wire of No. 1 by the bonding portion 15.

In the optical fiber holding structure 30b shown in FIG. 7B, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, and the optical fiber strand 13e. , 13f adhesive portion 15, optical fiber strands 13g, 13h adhesive portion 15, optical fiber strands 13b, 13c adhesive portion 15, optical fiber strands 13d, 13e adhesive portion 15, optical fiber element The wires 13f and 13g are located in the range up to the tip of the adhesive portion 15. Also in this case, all the optical fiber strands 13a to 13h are adjacent to at least one in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is bonded to another matching optical fiber wire at the bonding portion 15.

In the optical fiber holding structure 30c shown in FIG. 7C, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, and the optical fiber strand 13e. , 13f adhesive portion 15, optical fiber strands 13g, 13h adhesive portion 15, optical fiber strands 13b, 13c adhesive portion 15, optical fiber strands 13d, 13e adhesive portion 15, optical fiber element It is positioned so as to straddle the adhesive portion 15 of the lines 13f and 13g. Also in this case, all the optical fiber strands 13a to 13h are adjacent to at least one in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is bonded to another matching optical fiber wire at the bonding portion 15.

In the optical fiber holding structure 30d shown in FIG. 7D, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, and the optical fiber strand 13e. , 13f, and 13g, 13h, from the rear end of the optical fiber, 13b, 13c, and 13d, 13e. It is located in the range up to the adhesive portion 15 of the optical fiber strands 13f and 13g. Also in this case, all the optical fiber strands 13a to 13h are adjacent to at least one in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is bonded to another matching optical fiber wire at the bonding portion 15.

On the other hand, FIGS. 8 (a) to 8 (d) are views showing each optical fiber holding structure used in the test as a comparative example. In the optical fiber holding structure 30e shown in FIG. 8A, the pressing portion 17 has an adhesive portion 15 of the optical fiber strands 13b and 13c, an adhesive portion 15 of the optical fiber strands 13d and 13e, and an optical fiber strand 13f. , 13 g located at the site of the adhesive portion 15. Therefore, with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19, some optical fiber strands 13a and 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11. It is not bonded to the fiber optical wire by the bonding portion 15, and exists independently.

In the optical fiber holding structure 30f shown in FIG. 8B, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13b and 13c, the adhesive portion 15 of the optical fiber strands 13d and 13e, and the optical fiber strand 13f. , The adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, the adhesive portion 15 of the optical fiber strands 13e and 13f, and the optical fiber element from the adhesive portion 15 of 13 g. The wire 13g is located in the range up to the tip of the adhesive portion 15 of 13h. Also in this case, some optical fiber strands 13a and 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is not bonded to the optical fiber wire of No. 15 at the bonding portion 15, and exists independently.

In the optical fiber holding structure 30g shown in FIG. 8C, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13b and 13c, the adhesive portion 15 of the optical fiber strands 13d and 13e, and the optical fiber strand 13f. , The adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, the adhesive portion 15 of the optical fiber strands 13e and 13f, and the optical fiber element from the adhesive portion 15 of 13 g. It is located so as to straddle the adhesive portion 15 of the wire 13g and 13h. Also in this case, some optical fiber strands 13a and 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is not bonded to the optical fiber wire of No. 15 at the bonding portion 15, and exists independently.

In the optical fiber holding structure 30h shown in FIG. 8D, the pressing portion 17 has the adhesive portion 15 of the optical fiber strands 13b and 13c, the adhesive portion 15 of the optical fiber strands 13d and 13e, and the optical fiber strand 13f. , From the rear end of the 13g adhesive portion 15, the adhesive portion 15 of the optical fiber strands 13a and 13b, the adhesive portion 15 of the optical fiber strands 13c and 13d, and the adhesive portion 15 of the optical fiber strands 13e and 13f. It is located in the range up to the adhesive portion 15 of the optical fiber strands 13g and 13h. Also in this case, some optical fiber strands 13a and 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. It is not bonded to the optical fiber wire of No. 15 at the bonding portion 15, and exists independently.

The connection loss was measured by connecting the respective optical fiber holding structures to each other, and those having 0.2 dB or more were evaluated as x, and those having less than 0.2 dB were evaluated as ◯. The results are shown in Table 1.

In the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19, all the optical fiber strands are at least one of the other adjacent optical fiber strands. In the connection between the optical fiber holding structures 30a to 30d which are bonded to each other by the bonding portion 15, the connection loss was all ◯.

On the other hand, with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19, some optical fiber strands 13a and 13h are adjacent to each other in the width direction of the optical fiber tape core wire 11. The connection loss between the optical fiber holding structures 30e to 30h, which were not bonded to the fiber wire at the bonding portion 15 and existed independently, was x.

Next, other optical fiber holding structures were connected to each other, the connection loss was measured, and the same evaluation was performed. The results are shown in Table 2.

Both of the connection targets are any of the optical fiber holding structures 30a to 30d, and all of them are in the width direction of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. The optical fiber strands of No. 1 were bonded to at least one of the other adjacent optical fiber strands at the bonding portion 15, and the connection loss was all ◯.

On the other hand, at least one of the connection targets is any one of the optical fiber holding structures 30e to 30h, and the width of the optical fiber tape core wire 11 with respect to the total length from the tip of the pressing portion 17 to the glass fiber 19. In the direction, some of the optical fiber strands 13a and 13h were not adhered to the other adjacent optical fiber strands at the bonding portion 15, and those existing alone had a connection loss of x.

Although the embodiment of the present invention has been described above with reference to the attached drawings, the technical scope of the present invention does not depend on the above-described embodiment. It is clear that a person skilled in the art can come up with various examples of modification or modification within the scope of the technical idea described in the claims for utility model registration, and of course, the technical aspects of the present invention are also related to them. It is understood that it belongs to the range.

1 ………… Main body 3 ………… Lid 5 ………… Groove 7 ………… Pressing member 9 ………… Magnet 10 ………… Optical fiber holding member 11 ………… Optical fiber tape core wires 13a, 13b, 13c , 13d, 13e, 13f, 13g, 13h ………… Optical fiber wire 15 ………… Adhesive part 17 ………… Pressing part 19 ………… Glass fiber 20, 20a, 20b, 20c, 20d, 20e, 30a, 30b , 30c, 30d, 30e, 30f, 30g, 30h ……… Optical fiber holding structures 21, 21a, 21b, 21c ……… Mark 23 ……… Connection 25 ……… OTDR

Claims (6)

This is a method of setting the optical fiber tape core wire on the optical fiber holding member.
In the optical fiber tape core wire, adjacent optical fiber strands are adhered to each other at an adhesive portion, and the adhesive portions are formed in a staggered manner at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
The optical fiber holding member is provided on a main body portion for arranging the optical fiber tape core wire, a lid portion that can be opened and closed on the main body portion, and a pressing member provided on the inner surface of the lid portion to hold the optical fiber tape core wire. And equipped with
In a state where the optical fiber tape core wire is arranged in the main body portion, the lid portion is closed, and the optical fiber tape core wire is pressed by the pressing member, the optical fiber tape core is formed at the most advanced portion of the pressing member. In the width direction of the wire, all the optical fiber strands are bonded to at least one of the adjacent other optical fiber strands at the bonding portion, and from the most advanced portion of the holding member, the optical fiber In at least a part up to the glass fiber from which the wire coating is removed, in the width direction of the optical fiber tape core wire, all the optical fiber strands are at least one of the other adjacent optical fibers. All the bonded portions are bonded to the wire by the bonded portion, and all the bonded portions from the most advanced portion of the holding member to the glass fiber from which the coating portion of the optical fiber wire is removed are continuous in the longitudinal direction. hand,
In the optical fiber tape core wire, in the width direction of the optical fiber tape core wire, all the optical fiber strands are bonded to at least one adjacent other optical fiber strands at the bonding portion. A mark capable of grasping the first range of the optical fiber tape core wire is provided on the outer surface of at least a part of the first range of the optical fiber wire.
When the optical fiber tape core wire is pressed by the pressing member, the optical fiber is located so that the mark is located between the tip of the pressing member and the glass fiber from which the coating portion of the optical fiber wire is removed. how to set to the optical fiber holding member of the optical fiber ribbon you wherein setting the ribbon to the optical fiber holding member. This is a method of setting the optical fiber tape core wire on the optical fiber holding member.
In the optical fiber tape core wire, adjacent optical fiber strands are adhered to each other at an adhesive portion, and the adhesive portions are formed in a staggered manner at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
The optical fiber holding member is provided on a main body portion on which the optical fiber tape core wire is arranged, a lid portion that can be opened and closed on the main body portion, and a pressing member provided on the inner surface of the lid portion to hold the optical fiber tape core wire. And equipped with
In a state where the optical fiber tape core wire is arranged in the main body portion, the lid portion is closed, and the optical fiber tape core wire is pressed by the pressing member, the optical fiber tape core is formed at the most advanced portion of the pressing member. In the width direction of the wire, all the optical fiber strands are bonded to at least one of the adjacent other optical fiber strands at the bonding portion, and from the most advanced portion of the holding member, the optical fiber In at least a part up to the glass fiber from which the wire coating is removed, in the width direction of the optical fiber tape core wire, all the optical fiber strands are at least one of the other adjacent optical fibers. All the bonded portions are bonded to the wire by the bonded portion, and all the bonded portions from the most advanced portion of the holding member to the glass fiber from which the coating portion of the optical fiber wire is removed are continuous in the longitudinal direction. hand,
The optical fiber tape core is an optical fiber tape core in which at least a part of the optical fiber wires is not adhered to other adjacent optical fiber wires in the width direction of the optical fiber tape core. A mark capable of grasping the second range of the optical fiber is provided on the outer surface of at least a part of the second range of the optical fiber wire.
When pressing the optical fiber ribbons in the pressing member, the marks so that completely hidden in the pressing member, the light you characterized by setting said optical fiber ribbon to the optical fiber holding member How to set the fiber tape core wire to the optical fiber holding member. An optical fiber tape core wire in which multiple optical fiber strands are arranged in parallel.
Adjacent optical fiber wires are glued together at the adhesive part,
The adhesive portions are formed at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
Grasp the first range of the optical fiber tape core wire in which all the optical fiber strands are bonded to the other adjacent optical fiber strands at the bonding portion in the width direction of the optical fiber tape core wire. An optical fiber tape core wire characterized in that a mark that can be formed is provided on the outer surface of at least a part of the first range of the optical fiber wire. An optical fiber tape core wire in which multiple optical fiber strands are arranged in parallel.
Adjacent optical fiber wires are glued together at the adhesive part,
The adhesive portions are formed at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
To grasp the second range of the optical fiber tape core wire in the width direction of the optical fiber tape core wire, in which at least a part of the optical fiber strands is not adhered to the other adjacent optical fiber strands. An optical fiber tape core wire, characterized in that a mark capable of being provided is provided on the outer surface of at least a part of the second range of the optical fiber wire. An optical fiber tape core wire in which multiple optical fiber strands are arranged in parallel.
Adjacent optical fiber wires are glued together at the adhesive part,
The adhesive portions are formed at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
Grasp the first range of the optical fiber tape core wire in which all the optical fiber strands are bonded to the other adjacent optical fiber strands at the bonding portion in the width direction of the optical fiber tape core wire. Marks that can be made are provided on the outer surface of at least a part of the first range of the optical fiber wire.
The adhesive portion adheres a pair of adjacent optical fiber strands to each other.
The adhesive portions adjacent to each other in the width direction of the optical fiber tape core wire are formed in a staggered pattern in the longitudinal direction of the optical fiber tape core wire.
The mark is an optical fiber tape core wire comprising a range in which the adhesive portion is formed on the optical fiber strands at both ends in the width direction of the optical fiber tape core wire. An optical fiber tape core wire in which multiple optical fiber strands are arranged in parallel.
Adjacent optical fiber wires are glued together at the adhesive part,
The adhesive portions are formed at predetermined intervals in the longitudinal direction of the optical fiber tape core wire.
To grasp the second range of the optical fiber tape core wire in the width direction of the optical fiber tape core wire, in which at least a part of the optical fiber strands is not adhered to the other adjacent optical fiber strands. A mark is provided on the outer surface of at least a part of the second range of the optical fiber wire.
The adhesive portion adheres a pair of adjacent optical fiber strands to each other.
The adhesive portions adjacent to each other in the width direction of the optical fiber tape core wire are formed in a staggered pattern in the longitudinal direction of the optical fiber tape core wire.
The mark indicates an optical fiber in which the adhesive portion is not formed on the optical fiber strands at both ends in the width direction of the optical fiber tape core wire and the non-adhesive portion is formed. Tape core wire.

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