JP7019620B2 - Method of arranging optical fiber on optical fiber holding member and optical fiber holding member - Google Patents

Description

The present invention relates to an optical fiber holding member or the like capable of collectively holding a plurality of optical fibers.

For an optical fiber cable for transmitting a large amount of data at high speed, a multi-core optical fiber core wire is used for storage in the cable and simplification of work. When connecting the optical fiber core wire, an optical fiber holding member for holding the optical fiber is used, but in order to connect each optical fiber of the multi-core optical fiber core wire collectively. Needs to hold multiple optical fibers at once.

As such an optical fiber holding member, a groove corresponding to the entire width of the multi-core optical fiber core wire is formed in the longitudinal direction of the main body, and the lid is closed with the multi-core optical fiber core wire arranged in the groove. There is an optical fiber holding member in which a multi-core optical fiber core wire is pressed and held by a convex portion arranged on the inner surface of the lid (Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-57698

Normally, the multi-core optical fiber core wires are integrated in a state where the optical fibers are in contact with each other. That is, the pitch of the multi-core optical fiber core (the distance between the central axes of the adjacent optical fibers) is substantially the same as the outer diameter of the optical fiber constituting the multi-core optical fiber core. Therefore, the width of the multi-core optical fiber core wire is determined by the outer diameter and the number of optical fibers.

In the conventional optical fiber holding member for holding such a multi-core optical fiber core wire, the position of each optical fiber can be regulated by restricting the position of the entire multi-core optical fiber core wire in the width direction. Therefore, in the conventional optical fiber holding member, the position of each optical fiber can be regulated by forming a groove corresponding to the total width of the multi-core optical fiber core wire.

On the other hand, the conventional multi-core optical fiber core wire is generally composed of an optical fiber having a diameter of 250 μm. That is, most of the optical fibers were arranged at a pitch of 250 μm. However, in recent years, a multi-core optical fiber core wire having a pitch of 200 μm has been used in order to increase the density of the optical fiber.

In order to connect such 200 μm pitch multi-core optical fiber core wires to each other, an optical fiber holding member for 200 μm pitch is used. That is, an optical fiber holding member having grooves corresponding to the width of the multi-core optical fiber core wires arranged at a pitch of 200 μm is used.

However, there are cases where a 250 μm pitch multi-core optical fiber core wire conventionally used and a 200 μm pitch multi-core optical fiber core wire are connected. Therefore, an optical fiber holding member capable of connecting multi-core optical fiber core wires having different pitches, such as a 250 μm pitch multi-core optical fiber core wire and a 200 μm pitch multi-core optical fiber core wire, is desired. ..

The present invention has been made in view of such a problem, and provides an optical fiber holding member or the like capable of converting a pitch with a simple structure and reliably holding a multi-core optical fiber core wire. The purpose is to do.

In order to achieve the above-mentioned object, the first invention comprises a main body portion in which an optical fiber is arranged and a plurality of lid portions that can be opened and closed with respect to the main body portion, and the lower surface of each of the lid portions. The optical fiber holding portion is provided in at least a part of the main body portion, and the optical fiber installation surface of the main body portion is provided with a wide groove portion provided on the rear end portion side of the main body portion to position the entire optical fiber. , A V-groove portion is formed in front of the wide groove portion and a plurality of V-grooves are provided side by side. The lid portion has a first lid portion arranged in the wide groove portion and a plurality of second lid portions provided in the V-groove portion in the front-rear direction of the main body portion, and the V-groove portion has a large size. The pitch of the V-grooves gradually increases in the first straight portion where the V-grooves are arranged at substantially the same pitch on the rear end portion side of the main body portion and on the front end portion side of the first straight portion. A tapered portion and a second straight portion in which the V-grooves are arranged at substantially the same pitch on the front end portion side of the tapered portion, and at least one of the plurality of the second lid portions is the first. 1 is arranged so as to straddle the straight portion and the tapered portion, and the other one of the plurality of the second lid portions is arranged so as to straddle the tapered portion and the second straight portion. The length of the optical fiber holding portion of at least one second lid portion arranged so as to straddle the first straight portion and the tapered portion in the front-rear direction of the main body portion is the tapered portion. It is an optical fiber holding member characterized in that it is shorter than the length of the holding portion of the optical fiber of the other one other second lid portion arranged so as to straddle the second straight portion .

It is desirable that the plurality of the second lid portions are provided side by side on the same rotation shaft, and a spacer is arranged between the second lid portions.

Each of the lid portions can be maintained in a closed state by a magnet arranged in the main body portion, and it is desirable that the magnets are arranged separately for each of the lid portions.

It is desirable that the polarities of the magnets adjacent to each other in the front-rear direction of the main body are opposite to each other.

According to the first invention, V-grooves having different pitches are formed on the optical fiber installation surface so that the pitch at the front end portion is wider than the pitch at the rear end portion. That is, at the front end portion of the optical fiber holding member, the optical fibers can be held at predetermined intervals. Therefore, for example, a multi-core optical fiber core wire having a pitch of 200 μm can be converted into a core wire having a pitch of 250 μm and held.

Further, since the lid portion is divided into a first lid portion that holds the optical fiber in the wide groove portion and a second lid portion that holds the optical fiber in the V groove portion, first, the entire optical fiber is positioned in the wide groove portion. Later, the optical fiber can be pressed at a predetermined pitch by the V-groove portion. Further, since the second lid portion is divided into a plurality of portions, the optical fibers arranged in the V-groove portion can be sequentially pressed from the rear end portion side. Therefore, the optical fiber can be easily arranged in the V-groove.

In particular, the V-groove portion has a first straight portion and a tapered portion from the rear end portion side to the front end portion side of the main body portion, and at least one of the second lid portions has the first straight portion and the tapered portion. By arranging the optical fibers so as to straddle the two lids, the optical fiber can be efficiently guided to each V-groove and pressed when the second lid portion is closed.

Similarly, the V-groove portion further has a second straight portion in which the V-grooves are arranged at substantially the same pitch on the front end portion side of the tapered portion, and the other one of the second lid portions is the tapered portion and the second. By arranging so as to straddle the straight portion, the optical fiber can be efficiently guided to each V-groove and pressed when closing the second lid portion.

Further, by arranging the spacer between the plurality of second lid portions, it is possible to prevent the second lid portions from coming into contact with each other. Therefore, when closing one second lid portion, it is possible to prevent the other second lid portion from being accidentally closed at the same time.

Further, by arranging the magnets for keeping the respective lids closed separately for each lid, the individual magnets can be miniaturized. Therefore, the magnetic field leaking from the optical fiber holding member can be suppressed.

For example, the optical fiber holding member is used by being set in a fusion splicer, and some fusion splicers detect the opening and closing of the windshield by a magnetic field. Therefore, if a large amount of magnetic field leaks from the optical fiber holding member, a malfunction may occur. On the other hand, by making the magnets smaller individually, leakage of the magnetic field from the optical fiber holding member can be suppressed, and malfunction when used in the fusion splicer can be suppressed.

In particular, by making the polarities of the magnets adjacent to each other in the front-rear direction of the main body opposite to each other, the magnetic fields of each other cancel each other out, so that the leakage of the magnetic field from the optical fiber holding member can be suppressed more efficiently.

The second invention is the method of arranging an optical fiber on an optical fiber holding member according to the first invention, in which a plurality of optical fibers are arranged in the wide groove portion, the first lid portion is closed, and the optical fiber is closed. The second lid portion is closed in order from the rear end portion side of the main body portion, and the optical fiber is arranged over the entire length of the V groove portion. It is a method of arranging an optical fiber on a fiber holding member.

According to the second invention, by closing the second lid portion in order from the rear end portion side of the main body portion, the optical fiber can be arranged while being guided to the V groove toward the front end portion. Therefore, the optical fiber can be reliably arranged over the entire length of the V-groove.

According to the present invention, it is possible to provide an optical fiber holding member or the like capable of converting a pitch with a simple structure and reliably holding a multi-core optical fiber core wire.

The perspective view which shows the optical fiber holding member 1. The plan view which shows the optical fiber holding member 1. Enlarged view of the V-groove 11. (A) is a partial cross section of part C in FIG. 3, and (b) is a partial cross section of part D in FIG. The perspective view which shows the optical fiber holding member 1 in the state which the 1st lid 5a is closed. The perspective view which shows the optical fiber holding member 1 in the state which the 2nd lid 5b is closed. The perspective view which shows the optical fiber holding member 1 in the state which the 2nd lid 5c is closed.

Hereinafter, the optical fiber holding member 1 according to the embodiment of the present invention will be described. FIG. 1 is a perspective view showing the optical fiber holding member 1, and FIG. 2 is a plan view showing the optical fiber holding member 1. The optical fiber holding member 1 is mainly composed of a main body portion 3, a lid portion 5, a holding portion 7, and the like.

The main body 3 is a portion where an optical fiber is arranged, and is a member of a substantially rectangular parallelepiped. It should be noted that the optical fiber is held in the longitudinal direction of the main body 3 (the axial direction of the multi-core optical fiber core wire to be held) and the side where the multi-core optical fiber core wire is connected (direction arrow B in the figure). The front end side of the member 1 (main body 3) is referred to, and the opposite side (direction of arrow A in the figure) is referred to as the rear end side of the optical fiber holding member 1 (main body 3). Further, in the plane where the optical fiber of the main body portion 3 is arranged, the direction perpendicular to the longitudinal direction is defined as the width direction of the main body portion 3.

A first lid portion 5a and a second lid portion 5b, 5c that can be opened and closed independently of the main body portion 3 by hinges are provided on one side of the main body portion 3 in the width direction. Here, the first lid portion 5a, the second lid portion 5b, and 5c are collectively referred to as the lid portion 5. That is, the lid portion 5 has at least one first lid portion and at least two second lid portions 5b and 5c provided in the front-rear direction of the main body portion 3. The number of the lid portions 5 is not limited to this, and for example, the number of the second lid portions may be three or more, but the number of the second lid portions is preferably two.

The main body 3 and the lid 5 are made of metal, for example. Magnets 9a, 9b, 9c are arranged on the surface of the main body 3 facing the lid portion 5. When the first lid portion 5a and the second lid portion 5b and 5c are closed with respect to the main body portion 3, the first lid portion 5a and the second lid portion 5b and 5c are closed by the magnets 9a, 9b and 9c, respectively. The state is maintained. Each lid portion 5 is adjusted so that the lower surface of the lid portion 5 and the upper surface of the main body portion 3 are substantially parallel to each other in the closed state.

Here, the magnet 9a is arranged on the surface of the main body 3 facing the first lid 5a, and the magnets 9b and 9c are arranged on the surface of the main body 3 facing the second lid 5b and 5c, respectively. Will be done. That is, magnets 9a, 9b, and 9c are arranged separately for each lid portion 5.

In this way, by separating the magnets 9a, 9b, and 9c from each other, the individual magnets can be made smaller. Therefore, leakage of the magnetic field from the optical fiber holding member 1 can be suppressed.

Further, in this case, it is desirable that the polarities of the magnets 9a, 9b, and 9c adjacent to each other in the front-rear direction of the main body 3 are opposite to each other. For example, the magnets 9a and 9c have the same polarity, and only the magnet 9b has the opposite polarity.

By making the adjacent magnets 9a, 9b, and 9c have opposite polarities in this way, the magnetic fields cancel each other out, so that leakage of the magnetic field from the optical fiber holding member 1 can be suppressed more efficiently. By suppressing the leakage of the magnetic field from the optical fiber holding member 1 in this way, it is possible to suppress the malfunction in the fusion splicer as described above.

A holding portion 7 for holding the optical fiber is formed over a predetermined range in the longitudinal direction on at least a part of the lower surface of the lid portion 5 (the surface facing the main body portion 3). The pressing portion 7 protrudes from the inner surface of the lid portion 5 by a predetermined amount. The pressing portion 7 is a member that presses and holds an optical fiber arranged on the main body portion 3. The holding portion 7 is made of, for example, resin, and is made of a member that does not damage the optical fiber.

An optical fiber installation surface 13 on which each optical fiber constituting the multi-core optical fiber core wire is arranged is formed on the upper surface of the main body portion 3 (the surface facing the lid portion 5). A groove is formed along the longitudinal direction on the upper surface of the optical fiber installation surface 13 of the main body 3.

As shown in FIG. 2, the optical fiber installation surface 13 of the main body 3 has a wide groove portion 17 on the rear end side of the main body 3 for positioning the entire multi-core optical fiber core wire, and is in front of the wide groove portion 17. Is formed with a V-groove portion 15 in which a plurality of V-grooves 11 are provided side by side. In the wide groove portion 17, a single groove corresponding to the entire width of the multi-core optical fiber core wire is formed. That is, the wide groove portion 17 is formed with a width corresponding to the width of the multi-core optical fiber core wire before widening the pitch.

A plurality of V-grooves 11 are formed in the V-groove portion 15. 3 is an enlarged view of the V groove 11 in the V groove portion 15, FIG. 4A is a partial cross section of the C portion of FIG. 3, and FIG. 4B is a partial cross section of the D portion of FIG. .. The pitch on the rear end side (right side in the figure) of the main body 3 of the V groove 11 (E in FIG. 4A) is the pitch of the V groove 11 on the rear end side (right side in the figure) of the main body 3. It is narrower than F) in FIG. 4 (b). That is, in the V-groove portion 15, the pitch of the V-groove 11 increases from the rear end portion side to the front end portion side of the main body portion 3. For example, E in FIG. 4 (a) is 200 μm, and F in FIG. 4 (b) is 250 μm. The V-groove 11 is not necessarily limited to a V-shaped groove 11 and may have a flat surface on the lower surface as shown in FIGS. 4 (a) and 4 (b).

In this way, in the V-groove 11 on the rear end side of the main body 3, for example, the optical fibers 19 come into contact with each other. That is, the outer diameter of the optical fiber 19 substantially matches the pitch of the optical fiber 19. On the other hand, in the V groove 11 on the front end side of the main body 3, the optical fibers 19 are arranged apart from each other. At this time, the position of the optical fiber 19 is set by the pitch of the V-groove 11.

Although each V-groove 11 may be formed in a straight line, as shown in FIG. 3, in the V-groove portion 15, the V-grooves 11 are arranged at substantially the same pitch on the rear end portion side of the main body portion 3. In front of the first straight portion 11a and the first straight portion 11a, the tapered portion 11b in which the pitch of the V groove 11 gradually increases, and in front of the tapered portion 11b, the V grooves 11 are arranged at substantially the same pitch. It may have a second straight portion 11c to be formed. That is, the V-groove 11 may be smoothly bent at the boundary between the first straight portion 11a, the tapered portion 11b, and the second straight portion 11c.

Here, the first lid portion 5a is arranged in the wide groove portion 17. On the other hand, the plurality of second lid portions 5b and 5c are arranged side by side in the V-groove portion 15 in the front-rear direction of the main body portion 3. That is, since the optical fiber in the wide groove portion 17 can be pressed by the pressing portion 7 of the first lid portion 5a, the entire optical fiber can be positioned by closing the first lid portion 5a. On the other hand, since the holding portion 7 of the second lid portion 5b and 5c can hold the optical fiber in the V groove portion 15, by closing the second lid portion 5b and 5c, each optical fiber can be transferred to each V groove 11. It can be guided and pressed.

Here, the second lid portion 5b on the rear end portion side of the main body portion 3 is arranged so as to straddle the first straight portion 11a and the tapered portion 11b described above. By doing so, when the second lid portion 5b is closed, each optical fiber can be efficiently arranged in the tapered portion 11b of the V groove 11. Similarly, it is desirable that the second lid portion 5c on the front end portion side of the main body portion 3 is arranged so as to straddle the above-mentioned tapered portion 11b and the second straight portion 11c.

Next, a method of arranging the optical fiber on the optical fiber holding member 1 will be described. First, as shown in FIG. 5, a plurality of optical fibers 19 are arranged in the wide groove portion 17, and the first lid portion 5a is closed. The first lid portion 5a and the second lid portion 5b that are adjacent to each other are arranged with a gap.

Here, in the case where the plurality of optical fibers 19 are taped multi-core optical fiber core wires, the respective optical fiber 19s are previously bonded to each other at a predetermined length at the tip of the multi-core optical fiber core wire. The portion and the coating are peeled off, and the optical fiber 19 is individually divided. Further, when the first lid portion 5a is closed, the portion divided by each optical fiber 19 (near the boundary between the taped state and the separated state) is arranged so as to be located in the wide groove portion 17. By doing so, the optical fiber 19 can be easily arranged in the wide groove portion 17 depending on the portion taped, and the positioning is easy. Further, since each optical fiber 19 is divided on the front end side of the wide groove portion 17, the pitch of the optical fiber 19 can be changed according to each V groove 11.

Next, as shown in FIG. 6, the second lid portion 5b is closed. At this time, the optical fiber 19 is placed along the front end side of the main body portion 3, and the second lid portion 5b is closed while the optical fiber 19 is pressed by a finger.

Next, as shown in FIG. 7, the optical fiber 19 is placed along the front end side of the main body portion 3, and the second lid portion 5c is closed while the optical fiber 19 is pressed by a finger. That is, the second lid portions 5b and 5c are closed in order from the rear end portion side of the main body portion 3. By doing so, the optical fibers 19 can be arranged over the entire length of the V-groove portion 15, and with each optical fiber 19 arranged in the V-groove 11, the holding portions 7 of the second lid portions 5b and 5c are arranged. Can be pressed and held from above. Further, it is possible to prevent the optical fiber 19 from riding between the V grooves 11 or on the adjacent optical fiber, and to hold the optical fiber 19 with the holding member with good workability.

The length of the holding portion 7 of the second lid portion 5b is shorter than the length of the holding portion 7 of the second lid portion 5c. The second lid portion 5b guides and presses each optical fiber 19 into each V groove 11. Therefore, if the length of the pressing portion 7 of the second lid portion 5b is too long, the amount of change in the pitch of the tapered portion 11b at the front and rear ends of the pressing portion 7 becomes large. Therefore, there is a possibility that the optical fiber 19 rides on the V-groove 11 on the front end side of the holding portion 7. On the other hand, when the second lid portion 5c is closed, the optical fiber 19 is already arranged in the direction of forming the V groove 11 in the tapered portion 11b, so that the optical fiber 19 is formed even if the holding portion 7 is long. Is difficult to get on from the V groove 11.

Further, the second lid portions 5b and 5c are arranged so as to be adjacent to the same rotation axis, and the spacer 6 is arranged between the second lid portions 5b and 5c. The spacer 6 is a member such as a washer, and is a member for preventing the second lid portion 5b and the second lid portion 5c from coming into contact with each other.

As described above, in order to reliably guide the optical fiber 19 to each V groove 11 in the V groove portion 15, the second lid portions 5b and 5c need to be closed in order from the rear end portion side of the main body portion 3. Therefore, if the second lid portion 5c is accidentally closed at the same time when the second lid portion 5b is closed, the optical fiber 19 rides on the V-groove 11 in the vicinity of the front end portion of the V-groove portion 15 and is second. It may be pressed by the lid portion 5c.

On the other hand, by separating the second lid portion 5b and the second lid portion 5c by the spacer 6, the second lid portion 5b and the second lid portion 5c come into contact with each other, and the second lid portion 5b and the second lid portion 5b come into contact with each other. It is possible to prevent the 5c from closing. By making the length of the second lid portion 5b (corresponding to the width direction of the main body portion 3) longer than that of the second lid portion 5c, when closing the second lid portion 5b, a finger is applied to the second lid portion 5c. May be difficult to touch.

By using the optical fiber holding member 1 in which the multi-core optical fiber cores are held in this way, the multi-core optical fiber cores having different pitches can be easily connected to each other. For example, a multi-core optical fiber core wire having a pitch of 200 μm is arranged at a pitch of 250 μm at the front end of the optical fiber holding member 1. Further, another conventional optical fiber holding member holds a multi-core optical fiber core wire having a pitch of 250 μm. By setting these in a fusion splicer and performing fusion, multi-core optical fiber core wires having different pitches can be fused together. At this time, since the optical fiber holding member 1 can be formed in the same size as the conventional optical fiber holding member, it can be installed in the fusion splicer in the same manner as in the conventional case.

As described above, according to the present embodiment, since the plurality of V-grooves 11 are formed in the main body portion 3, each optical fiber 19 of the multi-core optical fiber core wire can be arranged in the V-groove 11. Therefore, each optical fiber 19 can be aligned at the pitch of the V-groove 11. That is, the V-groove 11 can align the fibers at a pitch larger than the diameter of the optical fiber 19. Therefore, by widening the pitch of the V-groove 11 toward the front end portion side, the pitch of the optical fiber 19 can be widened and held. Therefore, it is possible to connect multi-core optical fiber core wires having different pitches.

Further, by dividing the second lid portions 5b and 5c that hold the optical fiber 19 in the V-groove portion 15 into a plurality of portions and closing them in order from the rear end portion side of the main body portion 3, the optical fibers 19 can be efficiently arranged. It can be guided to the V-groove 11 and pressed.

In particular, the second lid portion 5b on the rear end portion side of the main body portion 3 can hold each optical fiber 19 at a position close to the wide groove portion 17. Therefore, by pressing the second lid portion 5b so as to straddle the tapered portion 11b from the first straight portion 11a having a pitch substantially the same as the pitch of the multi-core optical fiber core wire, each optical fiber 19 is efficiently tapered. It can be guided to each V groove 11 of the portion 11b.

At this time, by making the length of the holding portion 7 of the second lid portion 5b shorter than the length of the holding portion 7 of the second lid portion 5c, each optical fiber 19 is transferred to the tapered portion 11b of the V groove portion 15. It is possible to suppress the ride when first arranging.

Further, by arranging the spacer 6 between the second lid portion 5b and the second lid portion 5c, it is possible to prevent the second lid portion 5b and the second lid portion 5c from coming into contact with each other. Therefore, it is possible to prevent the second lid portion 5c from being accidentally closed at the same time when only the second lid portion 5b is to be closed.

Further, by separating the magnets 9a, 9b, and 9c for holding the first lid portion 5a and the second lid portion 5b and 5c in a closed state, they are integrated so as to straddle all the lid portions 5. Individual magnets can also be made smaller compared to forming magnets. By doing so, it is possible to suppress the magnetic field leaking from the optical fiber holding member 1 and suppress the malfunction of the fusion splicer.

Further, by separating the magnets, the polarities of the adjacent magnets 9a, 9b, and 9c can be opposite to each other. By doing so, the magnetic fields can cancel each other out, so that the magnetic field leaking from the optical fiber holding member 1 can be further suppressed.

Although the embodiments of the present invention have been described above with reference to the attached drawings, the technical scope of the present invention does not depend on the above-described embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical ideas described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs to.

For example, the multi-core optical fiber core wire is not limited to the case where the pitch is 200 μm, and when the multi-core optical fiber core wire having a narrow pitch is converted into a wide pitch, the V-groove 11 corresponding to the pitch can be formed. It can also be applied to a multi-core optical fiber core wire with a pitch of.

Further, the number of V-grooves 11 is not particularly limited, and can be applied to a multi-core optical fiber core wire composed of two or more optical fibers.

1 ………… Optical fiber holding member 3 ………… Main body part 5 ………… Cover part 5a ………… First lid part 5b, 5c ………… Second lid part 6 ………… Spacer 7 ………… Pressing member 9a , 9b, 9c ………… Magnet 11 ………… V groove 11a ………… First straight part 11b ………… Tapered part 11c ………… Second straight part 13 ………… Optical fiber installation surface 15 ………… V-groove 17 ………… Wide groove 19 ………… Optical fiber

Claims (5)

The main body where the optical fiber is placed and
A plurality of lids that can be opened and closed with respect to the main body,
Equipped with
An optical fiber holding portion is provided on at least a part of the lower surface of each of the lid portions.
On the optical fiber installation surface of the main body portion, a wide groove portion provided on the rear end portion side of the main body portion and performing positioning of the entire optical fiber, and a plurality of V grooves formed on the front end portion side of the wide groove portion. A V-groove is formed, and
In the V-groove portion, the pitch of the V-groove portion increases from the rear end portion side to the front end portion side of the main body portion.
The lid portion has a first lid portion arranged in the wide groove portion and a plurality of second lid portions arranged in the V-groove portion in the front-rear direction of the main body portion .
The V-groove portion has a pitch of the V-groove on the front end side of the first straight portion and a first straight portion in which the V-groove is arranged at substantially the same pitch on the rear end portion side of the main body portion. It has a tapered portion that gradually increases and a second straight portion in which the V-grooves are arranged at substantially the same pitch on the front end portion side of the tapered portion.
At least one of the plurality of second lid portions is arranged so as to straddle the first straight portion and the tapered portion.
The other one of the plurality of the second lid portions is arranged so as to straddle the tapered portion and the second straight portion.
The length of the optical fiber holding portion of at least one of the second lid portions arranged so as to straddle the first straight portion and the tapered portion in the front-rear direction of the main body portion is the tapered portion. An optical fiber holding member characterized in that it is shorter than the length of the holding portion of the optical fiber of the other one other second lid portion arranged so as to straddle the second straight portion . The optical fiber holding member according to claim 1, wherein the plurality of second lid portions are arranged side by side on the same rotation shaft, and spacers are arranged between the second lid portions. The claim is characterized in that each of the lid portions can be maintained in a closed state by a magnet arranged in the main body portion, and the magnets are arranged separately for each of the lid portions. 1 or the optical fiber holding member according to claim 2 . The optical fiber holding member according to claim 3 , wherein the magnets adjacent to each other in the front-rear direction of the main body have opposite polarities to each other. The method for arranging an optical fiber on an optical fiber holding member according to any one of claims 1 to 4 .
With a plurality of optical fibers arranged in the wide groove portion, the first lid portion closed, and the optical fiber along the front end portion side of the main body portion, the second lid portion is attached to the rear end of the main body portion. A method of arranging an optical fiber on an optical fiber holding member, which is closed in order from the portion side and the optical fiber is arranged over the entire length of the V-groove portion.

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