JPH11109140A - Case and bobbin for storing excess part of optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the installation of a case and bobbin with excellent space efficiency, and to improve the workability by providing a bobbin part winding excess part of an optical filer and a fame body storing the bobbin wherein the fume body is in contact with the outer circumference of the bobbin, and the bottom plate supports the bobbin upward. On the bottom plate an opening is provided to take out the bobbin. SOLUTION: The optical fiber excessive length storage case is provided with a bobbin 1A having a winding part of circular section in which an excessive length part of a coated optical fiber is wound, and a frame body 2 to storage the bobbin 1A. The frame body 2 is provided with a bottom plate part 20 which is brought into contact with an outer circumference of the bobbin 1A and supports the bobbin 1A from a lower side, and an opening part 21A to take out the bobbin 1A rolling along an upper surface of the bottom plate part 20. The coated optical fiber is wound around the bobbin 1A and stored, and the excessive length part is stored/taken out by rolling the bobbin 1A. Because the bobbin 1A is rolled to store/take out the excessive length part, the work is very easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber extra length storage case for accommodating an extra length of an optical fiber core secured at a connection portion of an optical cable or a connection portion of an optical component, and the like. The present invention relates to an optical fiber extra length bobbin for winding an extra length portion.

[0002]

2. Description of the Related Art When an optical cable is installed, an optical fiber connection operation is involved, but an extra length of about 1 m is secured at the end of the optical fiber cable to be connected in consideration of workability of the connection operation. It is common. This extra length is bundled and stored in the case after the connection operation is completed. When it is necessary to perform the connection operation again at this connection portion in a later year, the above-mentioned extra length portion is taken out of the case and the operation is performed. FIG. 11 shows an example of a case for storing the extra length of the optical fiber.

An optical fiber core F bundled in a figure eight shape is accommodated in a first accommodating portion 100A inside a case 100 shown in FIG. 11, and one end of the optical fiber cord F is connected to a connector 101 for connecting optical fibers. The other end is led out to the outside of the case 100, and the other end is drawn out into the second storage part 100B provided adjacent to the first storage part 100A. The reason why the optical fiber cores F are bundled in a figure eight shape is to prevent the twist that deteriorates the transmission characteristics of the optical fiber cores F from occurring, and to make it easy to take out the excess length. As shown in FIG. 11 (a), the optical fiber core wire F led out to the second storage portion 100B is led out of the case 100 after being formed into an S shape. A plurality of the cases 100 are arranged and stored in a box or the like (not shown).

[0004]

The optical fiber deteriorates the transmission characteristics when an excessive stress is applied. Therefore, the diameter of the bundled circle cannot be reduced so much. It was necessary to secure a size of about 130mm. Also, the thickness of the first storage portion 100A needs to be the thickness corresponding to the number of times the optical fiber core wires F are crossed in a figure eight shape. Further, as shown in FIG. 11B, in order to take out one case 100 from a plurality of cases 100 arranged in a line, an optical fiber core having a length necessary for taking out, such as the second storage portion 100B, is used. A space to secure F was also needed. As a result, the case for storing the extra length of the optical fiber core F tends to be large, and improvement in space efficiency has been desired.

The present invention provides an optical fiber extra length storage case which can be installed with good space efficiency and has good workability, and an optical fiber accommodation bobbin which efficiently accommodates the extra length portion of the optical fiber and is easy to handle. The purpose is to:

[0006]

An optical fiber extra length storage case according to the present invention comprises a bobbin having a winding section having a circular cross section around which the extra length portion of the optical fiber core wire is wound, and a frame for accommodating the bobbin. The frame body has a bottom plate portion that contacts the outer periphery of the bobbin and supports the bobbin from below, and an opening portion that takes out the bobbin that rolls along the upper surface of the bottom plate portion. And

According to the present invention, the optical fiber core is wound around the bobbin and stored, and when the extra length portion is stored / removed, the bobbin is rolled to store / retrieve the bobbin. Regardless of the length, if there is a space for the size of the bobbin, the extra length of the optical fiber can be stored efficiently. In addition, since the bobbin is stored and taken out through the opening of the frame body by rolling the bobbin, it can be very easily performed without depending on a special handling method.

Here, it is preferable that a pair of flanges are formed on both side edges of the winding portion. With such a configuration, the turbulence of the wound optical fiber core wire can be suppressed by the flange portion, and the width of the bobbin can be further reduced to further reduce the size of the entire case.

It is preferable that a notch is formed in at least one of the pair of flanges. By adopting such a configuration, a finger or the like can be inserted into the cutout portion, and the wound optical fiber core wire can be pressed against the wound portion to prevent the flapping, and work can be further improved. Can be done.

Alternatively, it is preferable that a hole is formed in at least one of the pair of flanges, and that an elastically deformable portion is formed between the hole and the outer periphery of the flange. With this configuration, the elastically deformed portion can be deformed by being pressed against the winding portion side with a finger or the like, and the wound optical fiber can be pressed against the winding portion to prevent flapping and work. The workability can be further improved. Moreover, since the outer shape of the bobbin usually remains circular, there is an advantage that the rolling of the bobbin is not hindered.

[0011] The distance between the pair of flanges may be approximately twice the thickness of the single-core optical fiber core wound around the winding part or the width of the tape-shaped multi-core optical fiber core. preferable. With such a configuration, the width of the bobbin is the minimum width required for winding the optical fiber core wire, so that the extra length of the optical fiber core wire can be stored most efficiently.

[0012] It is preferable that an elastic body that presses the stored bobbin against the other opposing inner surface is attached to one inner surface of the frame. With such a configuration, unnecessary rolling of the bobbin can be suppressed. In addition, when handling the bobbin at this time, when the bobbin is stored in the frame, the bobbin is simply rolled and stored in the frame from the opening, and when the bobbin is removed from the frame, the bobbin is simply rolled out from the opening and removed. Therefore, it can be handled very easily without using a special handling method.

Preferably, a concave or convex rail for guiding the rolling of the bobbin is formed on the upper surface of the bottom plate portion. With this configuration, the bobbin can be rolled along the rail when the bobbin is stored or taken out, which leads to an improvement in workability. Also, while the bobbin is housed in the frame, there is an advantage that the position of the bobbin can be regulated by this rail.

The bobbin for storing an extra length of optical fiber according to the present invention comprises:
It has a winding portion having a circular cross section around which the extra length of the optical fiber core wire is wound, and a pair of flange portions formed on both side edges of the winding portion, and the distance between the pair of flange portions is The thickness of the single-core optical fiber core wound around the portion or the width of the tape-shaped multi-core optical fiber core is approximately twice, and a cutout is formed in at least one of the pair of flanges. I have.
Alternatively, a hole may be formed instead of the notch, and an elastically deformable portion may be formed between the hole and the outer periphery of the flange.

According to the present invention, since the optical fiber is wound around the winding portion, if there is a space corresponding to the size of the bobbin per optical fiber, regardless of the extra length. The long part can be stored, and the extra length of the optical fiber can be stored with good space efficiency. Also,
By rolling and using the bobbin, the extra length of the optical fiber can be handled more easily.

Further, since a pair of flanges are provided, it is possible to suppress the turbulence of the optical fiber to be wound, and to reduce the width of the bobbin, which is advantageous in terms of space efficiency. In addition, a finger or the like is inserted into the cutout portion, and the wound optical fiber is pressed against the wound portion to prevent the flapping, thereby enabling the workability to be further improved. Further, since the distance between the pair of flanges is almost twice the thickness or width of the optical fiber core, the width of the bobbin is the minimum width necessary for winding the optical fiber core, and the space is the smallest. The extra length of the optical fiber can be efficiently stored.

When a hole and an elastically deformed portion are formed in place of the cutout, the elastically deformed portion is deformed by pressing the elastically deformed portion against the winding portion side with a finger or the like, and the wound optical fiber core is wound around the winding portion. It is the same that the work can be performed while preventing the flapping by pressing, and the workability can be further improved. Further, in addition to the effects described above,
Since the outer shape of the bobbin usually remains circular, there is an advantage that its rolling is not hindered.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an optical fiber extra length storage case according to the present invention will be described with reference to FIGS.

In this case, as shown in FIGS.
A bobbin 1A and a frame 2 are provided. In the figure,
Although only two bobbins 1A are shown, a number of bobbins 1A (FIG. 1) are arranged in parallel with these two bobbins 1A.
To 26 in the case shown in FIG. 3). One of the two bobbins 1 </ b> A shown is housed in the frame 2, and the other one is taken out of the opening 21 </ b> A of the frame 2.

First, the bobbin 1A will be described. As shown in FIG. 4, the bobbin 1A of the case includes a winding portion 10 having a circular cross section around which the optical fiber core F is wound, and a pair of flanges 1 formed on the peripheral edge thereof.
And 1. By the flange portion 11, the winding disturbance of the optical fiber core F to be wound can be suppressed, and the bobbin 1A
Can be reduced in width. In addition, a pair of flanges 11
Are formed with notches 12 at opposing parts. The diameter of the wound portion 10 is a diameter that does not deteriorate the transmission characteristics of the optical fiber core F to be wound, for example, 60 mm.
mm.

When the bobbin 1A is stored in the frame 2, the weight of the bobbin 1A is supported by the flange 11, and no load is applied to the optical fiber core F wound between the flanges 11. Further, as shown in FIG. 5, the distance D between the pair of flanges 11 is substantially twice the width d of the optical fiber core F to be wound. For this reason, the wound optical fiber core wires F can be distributed in opposite directions at the lowermost position of the bobbin, and the width of the bobbin 1A at that time can be minimized. Here, the width almost doubled means that two optical fiber core wires F to be wound can be arranged in parallel on the surface of the winding portion 10, and the exposed surface of the winding portion 10 at this time is substantially The width of the state where there is not.

The length of the notch 12 along the outer periphery of the bobbin 1A is set to a length that allows a finger to be inserted, and the depth of the notch 12 reaches the surface of the winding portion 10 at the bottom. It is with depth. Put your finger into the notch 12
Since the optical fiber core F wound around 0 is held down,
As shown in FIG. 4, it is preferable that two notches 12 are formed so as to face each other, but it may be formed only on one flange 11. As long as the rolling of bobbin 1A is not inhibited,
There is no limitation on the number of notches 12. In addition, although the winding part 10 was formed in the solid cylindrical shape, it may be formed in a hollow cylindrical shape.

Next, the frame 2 will be described. Frame 2
As shown in FIGS. 1 to 3, the bottom plate 20 and the side plate 2
2 and an upper plate 23. Bottom plate 20
The side plate portions 22 are erected on both side edges on one end side, and the upper plate portion 23 is erected on the two side plate portions 22 to form a frame-shaped storage portion X.
Are formed. The bottom plate portion 20 protrudes from the storage portion X, and an extraction portion Y and a connector holding portion Z are formed at the protruding portion. As shown in FIG. 2, the mounting portion Y side of the storage portion X is opened to form an opening 21A, and the opposite side is also opened to form an opening 21B.

The bottom plate portion 20 has an upper surface 20A extending in the horizontal direction for rolling the bobbin 1A, and from a substantially center of the upper surface 20A to the storage portion X side, as shown in FIG. A plurality of convex rails 24A are formed in parallel. As shown in FIG. 5, the rail 24A has a width slightly smaller than the distance D between the pair of flanges 11 of the bobbin 1A, and guides the rolling of the bobbin 1A via the flange 11. The distance between the rails 24A is such that even if the flange 11 of the adjacent bobbin 1A is inserted together,
The distance is short enough not to hinder the rolling of A. Further, the length of the rail 24A is a length from a substantially center of the storage portion X to a little to the extraction portion Y, that is, the bobbin 1A.
The bobbin 1A has a length that covers a range in which the bobbin 1A comes into contact with the bottom plate portion 20 until the bottom is removed.

As shown in FIGS. 1 and 2, a pair of first projections 25 are provided at the ends of the open portions 21B between the rails 24A.
A and the second protrusion 25B are formed at a certain distance. The first protrusion 25A and the second protrusion 25B are formed so as to connect adjacent rails 24A, and the first protrusion 25A is lower than the second protrusion 25B. As shown in FIG. 2, the first protrusion 25A and the second protrusion 25
B restricts the rolling of the bobbin 1A stored in the storage section X. However, since the height of the first projection 25A is not high, it does not hinder the removal of the bobbin 1A.

As shown in FIGS. 1 and 2, a plurality of core wire alignment projections 26A are formed at the end of the bottom plate 20 on the side of the opening 21B. The cord alignment projection 26A is
The rails 24A are arranged in parallel so that their positions are alternated. The distance between the cord aligning projections 26A is substantially equal to the width of the optical fiber cord F wound around the bobbin 1A. One end of the optical fiber cord F wound around the bobbin 1A passes between the cord aligning projections 26A. Are aligned.

As shown in FIGS. 2 and 3, a convex rail 24B facing the rail 24A is provided on the lower surface of the upper plate portion 23.
Are formed. On the open portion 21B side of the upper plate portion 23,
A hanging wall 26B is formed to regulate the bobbin 1A from rolling out of the case from the opening 21B side. The hanging wall 26B is formed over the entire length of the bobbin 1A in the parallel direction.

As shown in FIGS. 1 and 2, the bottom plate portion 20 protrudes from the storage portion X on the opening portion 21A side, forms a take-out portion Y, and further has a connector holding portion Z on the distal end side. Has formed. A pair of parallel connector holding walls 27A and 28A are formed in the connector holding portion Z, and the connector holding walls 27A and 28A have holding grooves 27 which are alternately arranged with the rails 24A.
B and 28B are formed at regular intervals.

Although the front and back sides of the frame 2 are formed as an opening 21A and an opening 21B, these parts may be formed to have doors that can be opened and closed. It is also possible to form the door so that it becomes the extraction part Y and the connector holding part Z. Further, the above-described take-out portion Y and connector holding portion Z do not necessarily have to be formed.

Next, a method of using the above-mentioned optical fiber extra length storage case will be briefly described.

First, the optical fiber core F is inserted from the opening 21A of the storage part X to the opening 21B. Thereafter, the optical fiber core wire F is wound around the bobbin 1A on the take-out portion Y side so as not to twist. In addition, the method of winding the optical fiber core wire F around the bobbin 1A without twisting is performed by various known methods (for example, a method described in JP-A-64-6908).

At this time, the optical fiber core F wound around the bobbin 1A is positioned below the bobbin 1A in FIG.
2, and to the left and right in FIG. Collar 11
Since the distance D between them is approximately twice the width d of the optical fiber core F, it is possible to sort the bobbins 1A while minimizing the width thereof. The optical fiber core F distributed to the right in FIG. 1 is led out of the case after being aligned through the core alignment protrusions 26A. On the other hand, the optical fiber core F distributed to the left in FIG. 1 has a connector 3 coupled to an end thereof and is connected to another optical fiber core. The connector 3 includes a ferrule 30 and a clamp spring 3 for fixing the pair of butted ferrules 30.
1 is a so-called MT connector. The connector 3 has an optical fiber core F at each end thereof and a holding groove 27.
B, 28B and held by the connector holding portion Z.

When the bobbin 1A is stored in the storage portion X, the bobbin 1A is rolled so that the upper and lower rails 24A and 24B are positioned between the pair of flanges 11 and 11, as shown in FIG. While being stored in the storage section X. When removing the bobbin 1A from the storage section X, the bobbin 1A
Is taken out from the opening 21A while being rolled along the upper surface 20A of the bottom plate portion 20 to the takeout portion Y side, the optical fiber core F is loosened, the optical fiber core F is removed from the bobbin 1A, and the extra length is used. I do.

This case is configured as described above,
The optical fiber core F is wound around the bobbin 1A and stored, and when the extra length is stored / removed, the bobbin 1A is rolled for storage / removal. Irrespective of this, if there is a space for the size of the bobbin 1A, the extra length can be efficiently stored. In addition, since the bobbin 1A is rolled up and stored through the opening 21A of the frame 2 by rolling the bobbin 1A, the bobbin 1A can be very easily performed without depending on a special handling method.

FIG. 6 shows another embodiment of the bobbin. The bobbin 1B is formed in the same manner as the bobbin 1A shown in FIG. 4 except that a hole 13 and an elastically deformable portion 14 are formed instead of the cutout 12 of the bobbin 1A shown in FIG.
For this reason, the following specifically describes the hole 13 and the elastically deformable portion 1.
4 will be described, and the same or equivalent components as those of the bobbin 1A shown in FIG. 4 will be assigned the same reference numerals and detailed description thereof will be omitted.

Each flange 11 of the bobbin 1B has
As shown in (a), four holes 13 curved along the outer periphery of the bobbin 1B are formed uniformly. The outer peripheral side of the bobbin of the hole portion 13 is formed as an elastically deformable portion 14 which does not bend under the own weight of the bobbin 1B but can be bent by pressing with a finger. When this elastically deformable portion 14 is pushed from the outside, the elastically deformable portion 14 is deformed as shown in FIG. 6B, and the hole 13 is crushed. For this reason, the elastically deformable portion 14 is deformed to
Can be pressed against the winding portion 10 to prevent the optical fiber core wire F from flapping, and the bobbin 1B can be easily handled.

The length of the hole 13 along the outer periphery of the bobbin 1B is such that the elastically deformable portion 14 formed on the outer periphery thereof can be pressed with a finger.
It is formed so as to reach the zero surface. Since the elastically deformable portion 14 is pressed with a finger to hold down the optical fiber core F wound around the winding portion 10, it is preferable to form the pair of holes 13 so as to face each other as shown in FIG. The hole 13 and the elastically deformable portion 14 may be formed only in the flange portion 11 of the above.

As described above, the elastically deformable portion 14 is formed of a material such as a synthetic resin or the like, which is easily elastically deformed and bent when pressed by a finger, and returns to its original shape by an elastic restoring force when the finger is released. Is done. When the elastic deformation portion 14 is formed of a synthetic resin, it can be integrally formed with the entire bobbin 1B. In the case of the bobbin 1B, when the bobbin 1B is taken out of the storage portion X, the bobbin 1B can be taken out by hooking a nail or the like on the hole 13.
3 can also be used for taking out the bobbin 1B.

FIG. 7 shows a second embodiment of the optical fiber extra length storage case according to the present invention.

This case is different from the cases shown in FIGS. 1 to 3 and 5 only in the form of the rail for guiding the rolling of the bobbin 1A. Therefore, in the following, the rails 24C and 24D will be particularly described, and the same reference numerals will be given to the same or equivalent configurations as those shown in FIGS. 1 to 3 and 5, and detailed description thereof will be omitted.

In this case, as shown in FIG. 7, a rail 24C for guiding the rolling of the bobbin 1A is formed in a concave shape on the upper surface of the bottom plate 20, and the rail 24D is formed on the upper plate 2
3 is formed in a concave shape on the lower surface. These rails 24
The widths of C and 24D are slightly larger than the width of bobbin 1A, and guide the rolling of bobbin 1A through flange 11. The first projection 25A and the second projection 25B are formed in the lower rail 24C. The method of using this case is the same as the case shown in FIGS. 1 to 3 and 5 described above.

FIG. 8 shows a third embodiment of the optical fiber extra length storage case according to the present invention.

In this case, a bobbin 1 is used instead of the upper rail 24B in the cases shown in FIGS.
A elastic body 29A that suppresses unnecessary rolling of
It is attached to the lower surface of. Therefore,
In particular, the elastic body 29A will be described with reference to FIGS.
The same reference numerals are given to the same or equivalent configurations as the case shown in FIG.

In this case, as shown in FIG. 8, an elastic body 29A for suppressing unnecessary rolling of the bobbin 1A is attached to the lower surface of the upper plate 23. Elastic body 29A
Is a sponge or the like. When the bobbin 1A is stored in the storage portion X, the bobbin 1A is elastically deformed, and the elastic restoring force presses the bobbin 1A against the bottom plate portion 20. As a result, unnecessary rolling of the bobbin 1A can be suppressed, and no special operation is required at the time of use, and the bobbin 1A can be used similarly to the cases shown in FIGS. 1 to 3 and 5 described above.

FIG. 9 shows a fourth embodiment of the optical fiber extra length storage case according to the present invention.

This case is also provided with an elastic body 29B for suppressing unnecessary rolling of the bobbin 1A as in the case shown in FIG. 8, but this elastic body 29B is the same as the elastic body in the case shown in FIG. This is a different form from 29A. Also,
In this case, an elastic body 29B is attached to the lower surface of the upper plate portion 23 instead of the upper rail 24B in the cases shown in FIGS. 1 to 3 and FIG. The same or equivalent components as those shown in FIGS. 1 to 3 and FIG. 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this case, as shown in FIG. 9, an elastic body 29B for preventing unnecessary rolling of the bobbin 1A is attached to the lower surface of the upper plate portion 23. Elastic body 29B
Is a plate-shaped member extending in a cantilever shape and is formed over the entire length of the bobbin 1A in the parallel direction. Elastic body 29B
Is formed of an elastically deformable synthetic resin, and is integrally formed when the entire case is molded. When the elastic body 29B blade and the bobbin 1A are stored in the storage portion X, the bobbin 1A is elastically deformed upward, and the bobbin 1A is pressed against the bottom plate portion 20 by the elastic restoring force.
As a result, unnecessary rolling of the bobbin 1A can be suppressed, and no special operation is required during use.
It can be used similarly to the case shown in FIG. 3 and FIG.

In this case, the cantilevered elastic body 29B is formed over the entire length of the bobbin 1A in the parallel direction, but may be formed separately for each bobbin 1A. Also, instead of being formed integrally with the case, the cantilevered elastic body 29B may be formed separately and attached to the inner surface of the case.

In the above-described case shown in FIGS. 1 to 9, in order to make it easier to take out the bobbin 1A from the frame 2, a take-out tool 4 shown in FIG. 10 can be used. As shown in FIG. 10, the removal tool 4 is disposed so that the vertical arms 41A and 41B are located between the flanges 11 for each bobbin 1A. In this state, the removal tool 4 is placed in the frame 2 together with the bobbin 1A. Is stored. When stored in the frame 2,
The engaging portion 40 has an engaging hole 26C formed in the hanging wall 26B.
Engages. By doing so, when removing the bobbin 1A from the frame 2, the horizontal arm 41C can be pinched and easily removed. Furthermore, the frame 2 of the bobbin 1A
When the bobbin 1A is housed in the container, the position of the bobbin 1A in the parallel direction can be regulated, and the vertical arms 41A, 4A
By 1B, unnecessary rolling of the bobbin 1A can be prevented. In the case where the removal tool 4 is used, it is not necessary to form a rail on the lower surface of the upper plate 23.

[0050]

According to the present invention, there is provided an optical fiber extra length storage case including a bobbin having a winding portion for winding an extra length of an optical fiber core wire, and a frame for storing the bobbin. It has a bottom plate that contacts the outer periphery of the bobbin and supports the bobbin from below, and an opening that takes out the bobbin that rolls along the upper surface of the bottom plate. .

The bobbin for storing an extra length of optical fiber according to the present invention comprises a winding portion having a circular cross section around which the extra length of the optical fiber core wire is wound, and a pair of flange portions formed on both side edges of the winding portion. And the distance between the pair of flanges is substantially twice as large as the thickness of the single-core optical fiber core wound around the winding part or the width of the tape-shaped multi-core optical fiber core. Since a notch is formed in at least one of the portions (or a hole is formed in at least one of the pair of flanges, and an elastically deformable portion is formed between the outer peripheral portion of the flange and the hole). The extra length of the optical fiber can be efficiently stored, and the handling is easy.

[Brief description of the drawings]

FIG. 1 is a first view of an optical fiber extra length storage case according to the present invention.
It is a top view showing an embodiment.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing an embodiment of an optical fiber extra length storage bobbin according to the present invention.

FIG. 5 is an enlarged front view of a main part in FIG. 2;

FIG. 6 is a perspective view showing another embodiment of the optical fiber extra length storage bobbin according to the present invention.

FIG. 7 shows a second example of the optical fiber extra length storage case according to the present invention.
It is a front view of an embodiment.

FIG. 8 shows a third embodiment of the optical fiber extra length storage case according to the present invention.
It is a front view showing an embodiment.

FIG. 9 shows a fourth embodiment of the optical fiber extra length storage case according to the present invention.
It is a sectional side view showing an embodiment.

FIG. 10 is a perspective view of a drawer used for the optical fiber extra length storage case according to the present invention.

FIG. 11 is a perspective view showing an example of an optical fiber extra length storage case.

[Explanation of symbols]

F: optical fiber core wire, 1A, 1B: bobbin, 10: winding portion, 11: flange portion, 12: notch portion, 13: hole portion, 14: elastically deformed portion, 2: frame body, 20: bottom plate portion, 21A: opening, 24A to 24C: rail, 29A, 29B: elastic body.

Claims (9)

[Claims] 1. A bobbin having a winding portion having a circular cross section around which an extra length of an optical fiber core wire is wound, and a frame body for accommodating the bobbin, wherein the frame body is in contact with an outer periphery of the bobbin. A bottom plate portion for supporting the bobbin from below, and an opening for taking out the bobbin rolling along the upper surface of the bottom plate portion. 2. The optical fiber extra length storage case according to claim 1, wherein a pair of flange portions are formed on both side edges of the winding portion. 3. The optical fiber extra length storage case according to claim 2, wherein a notch is formed in at least one of the pair of flanges. 4. The method according to claim 2, wherein a hole is formed in at least one of the pair of flanges, and the flange has an elastically deformable portion between the outer peripheral portion and the hole. Optical fiber extra length storage case as described. 5. The distance between the pair of flanges is approximately twice the thickness of a single-core optical fiber core wound around the winding part or the width of a tape-shaped multi-core optical fiber core. An optical fiber extra length storage case according to claim 2. 6. The optical fiber holder according to claim 1, wherein an elastic body that presses the stored bobbin against the other opposing inner surface is attached to one inner surface of the frame. Long storage case. 7. The optical fiber extra length storage case according to claim 1, wherein a concave or convex rail for guiding rolling of the bobbin is formed on the upper surface of the bottom plate portion. 8. A wrapping portion having a circular cross section around which the extra length of the optical fiber core wire is wrapped, and a pair of flange portions formed on both side edges of the wrapping portion; The distance between them is approximately twice the thickness of the single-core optical fiber core wound around the winding part or the width of the tape-shaped multi-core optical fiber core, and a notch is formed in at least one of the pair of flanges. A bobbin for storing an extra length of optical fiber, characterized in that a bobbin is formed. 9. A winding part having a circular cross section around which the extra length of the optical fiber core wire is wound, and a pair of flanges formed on both side edges of the winding part, wherein the pair of flanges is provided. The distance between them is approximately twice the thickness of the single-core optical fiber core wound around the winding part or the width of the tape-shaped multi-core optical fiber core, and a hole is formed in at least one of the pair of flanges. Wherein an elastically deformable portion is formed between an outer peripheral portion of the flange portion and the hole portion.