JP3334409B2 - Optical fiber extra storage case - Google Patents

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 storing a connection portion of an optical fiber used in the optical communication field and an extra length of the connection portion.

[0002]

2. Description of the Related Art Optical fiber cable branching and drawing,
When connection or the like is performed, the optical fiber core has an extra length so that reconnection or the like of the optical fiber can be performed. Such a connection portion of the optical fiber core and its extra length are shown in FIG.
It is stored in an optical fiber extra length storage case as shown in (a) and (b). The conventional optical fiber extra-length storage case shown in FIGS. 3A and 3B has an optical fiber core introduced into the extra length storage case and an extra length core at a connection portion between the introduced optical fiber cores. Are extra-length storage cases that coexist in the same case.

In FIGS. 3A and 3B, reference numeral 1 denotes an optical fiber core, reference numeral 2 denotes a connection portion of the optical fiber core 1, reference numeral 3 denotes an introduction core of the optical fiber core 1, and reference numeral 4 denotes an optical fiber core 1. Reference numeral 33 denotes an extra length storage case. In the case of FIG. 3A, the extra long core wire 4 of the optical fiber core 1 including the connection portion 2 is largely looped, the connection portion 2 is set to a predetermined fixed portion, and the extra long core wire 4 is Extra long storage case 3
3 inside. In the case of FIG. 3 (b), the connecting portion 2 is set to a predetermined fixing portion, and the extra long cores 4 of the respective optical fiber cores 1 are individually wound, and the extra long cores 4 are trimmed. Are individually stored in the extra-length storage case 33.

[0004]

In any of the above cases,
When the optical fiber 1 including the connecting portion 2 housed in the extra length storage case 33 is to be taken out for maintenance or reconnection or the like, an arbitrary specific optical fiber 1 is taken out. In other words, since the introduction core wire 3 and the extra long core wire 4 are complicated at the portion A, they cannot be easily taken out. Therefore, when an arbitrary specific optical fiber core 1 is taken out, all the optical fiber cores 1 including the connection part 2 are taken out once, and a predetermined optical fiber core 1 is taken from among them.
Since there is a problem that the work is troublesome and time-consuming, the work efficiency is poor. Also, in any of the above cases, when the extra length core wire 4 is looped to create the extra length loop, the operator may use the optical fiber core wire 1.
To be smaller than the allowable minimum bending diameter of
There is a possibility that a loss in transmission in optical communication may be increased by generating a sharp bend in the portion of the extra-long cord 4 exposed from the reinforcing member of the connection portion 2 of the optical fiber 1. .

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide an optical fiber extra length storage case in which an optical fiber core can be easily stored and easily taken out.

[0006]

The present invention has the following means to solve the above problems.

According to the present invention, there is provided an optical fiber extra length storage case , comprising: a bottom plate;
Side plates provided facing each other, and provided at both ends of the side plates.
An optical fiber extra length storage case, which is formed in a box shape by the end plate and has an optical fiber core introduction portion, an optical fiber extra length storage portion, and an optical fiber core connection portion fixing portion ,
The optical fiber lead-in section is provided on one of the side plates.
The optical fiber is provided at the intersection of both ends and the end plate.
Stored in the extra length storage section of the optical fiber
The extra long core line is not less than the specified radius of curvature.
A ring-shaped extra length guide is provided, and between the optical fiber core introduction portion and the optical fiber extra length storage portion, an introduction core introduced from the optical fiber core introduction portion and an optical fiber are provided. A separation guide for separating the extra-core fiber stored in the extra-fiber-length storage section of the fiber is provided,
From the end plate so that it can be stored neatly without complication
Provided extending inside the optical fiber extra length storage case
It is characterized by having been done.

[0008]

[0009] optical fiber excess length storage case according to claim 2 of the present invention, an optical fiber extra length accommodating section optical fiber extra length provided on both sides of the optical fiber connecting portion fixing portion housing Between the extra length guide of the optical fiber core connection part fixing part and the optical fiber core connection part fixed part at the optical fiber core connection part fixed part has a predetermined radius of curvature. An extra-length protection guide is provided to prevent the following.

[0010]

According to the optical fiber extra length storage case of the present invention, the bottom plate and both sides in the longitudinal direction of the bottom plate are provided.
Side plates provided facing each other and provided at both ends of the side plates
An optical fiber extra length storage case, which is formed in a box shape by the end plate provided and includes an optical fiber core introduction portion, an optical fiber extra length storage portion, and an optical fiber core connection portion fixing portion ,
The optical fiber core introduction part is one of the side plates.
Provided at the intersection of both ends of the
Stored in the extra length storage section of the optical fiber
Make sure that the extra long core line is not less than the specified radius of curvature.
Is provided with a ring-shaped extra length guide, and further , between the optical fiber core introduction portion and the optical fiber extra length storage portion, an introduction core introduced from the optical fiber core introduction portion. A separation guide for separating the extra-long core stored in the optical-fiber extra-length storage section, the introduction core and the extra-long core,
The end plate so that it is stored neatly without
From the optical fiber extra length storage case.
Because it is kicked, when taking out the optical fiber cable comprising a connecting portion which is accommodated in the slack storage case for such maintenance and reconnection, it is easily taken out any particular optical fiber And efficient processing such as maintenance and reconnection.

Further, according to the optical fiber excess length storage case according to claim 1 of the present invention, excess length core wire is accommodated in an optical fiber extra length accommodating portion in the optical fiber excess length storage section Since the extra length guide is provided so as not to be less than the predetermined radius of curvature, when the extra length center line is looped and the extra length loop is created, the extra length loop should be created according to the extra length guide Accordingly, even a worker who is unfamiliar with the work does not round the optical fiber core wire smaller than the allowable minimum bending diameter.

According to the optical fiber excess length storage case according to claim 2 of the present invention, an optical fiber extra length accommodating section optical fiber excess be provided on both sides of the optical fiber connecting portion fixing portion Between the extra length guide of the long storage part and the optical fiber core connection part fixing part, the extra length core led out from the optical fiber core connection part fixed to the optical fiber core connection part fixing part is a predetermined length. Since the extra length protection guide is provided so as not to become smaller than the radius of curvature, the excess length core exposed from the reinforcing member of the connection part fixed to the optical fiber core connection part fixed part is exposed at the time of exposure. This prevents the occurrence of an excessive bending and prevents an increase in transmission loss in optical communication.

[0013]

The present invention will be described below in detail with reference to examples. FIGS. 1 and 2 show an embodiment of the optical fiber extra length storage case of the present invention. Note that the same components as those in the related art are denoted by the same reference numerals as those in the related art, and detailed description is omitted.

1 and 2, reference numeral 5 denotes an optical fiber extra length storage case of the present embodiment. The extra-length storage case 5 includes a bottom plate 6 and side plates 7 provided on both sides in the longitudinal direction of the bottom plate 6 and arc-shaped end plates 8 provided at both ends of the side plate 7.
To form a box. In the figure of the extra-length storage case 5 formed in a box shape, a core introduction portion 9 of the optical fiber core 1 is provided at an intersection of both ends of an upper side plate 7 and an arc-shaped end plate 8. . A separation guide 10 is provided inside the extra length storage case 5 of the core wire introduction portion 9 so as to extend from the arc-shaped end plate 8 to the interior side of the extra length storage case 5.

In FIG. 1, the lower side of the separation guide 10 is formed with an optical fiber extra length storage portion 11, and an intermediate portion in the optical fiber extra length storage portion 11 is provided with an extra portion. A ring-shaped extra length guide 12 is provided so as not to be smaller than a predetermined radius of curvature when the long cord 4 is stored, that is, not to be smaller than the allowable radius of curvature of the optical fiber 1. The optical fiber core storage section 11 is provided with an optical fiber core so as to roughly go from the side plate 7, the arc-shaped end plate 8 and the separation guide 10 to the excess guide 12 in the optical fiber core storage section 11. Protrusion prevention fins 13 are provided respectively. The optical fiber core protrusion prevention fins 13 prevent the extra length core wire 4 stored in the extra length optical fiber storage portion 11 from jumping out of the extra length optical fiber portion storage portion 11.

An optical fiber connecting portion fixing portion 14 is provided at an intermediate portion between the optical fiber extra length storing portions 11 on both sides. The optical fiber core connecting part fixing part 14 can fix the individual optical fiber core connecting parts 2 one by one. Specifically, for example, a plurality of comb-shaped fins 15 are arranged in two rows in parallel on the bottom plate 6 of the extra-length storage case 5. It should be noted that in the figure, the core wire introduction portion 9
To prevent the optical fiber from jumping out
Is provided to prevent the introduction core wire 3 introduced from the core wire introduction section 9 from jumping out.

Between the extra length guide 12 and the optical fiber core connection part fixing part 14, the extra length core wire 4 derived from the optical fiber core part 2 fixed to the optical fiber core part fixing part 14 is provided. Is bent to a predetermined radius of curvature or less and the extra length guide 1
An extra-length protection guide 17 is provided so as not to be wound around.

The extra length protection guide 17 is provided on the center line of the extra length guide 12 in the optical fiber extra length storage section 11 on both sides, and the radius of curvature of the upper and lower surfaces thereof is equal to that of the optical fiber core 1. The radius of curvature is set to be equal to or larger than the allowable radius of curvature. By providing the extra-length protection guide 17, the bending of the extra-long core wire 4 exposed from the reinforcing member 18 of the connecting portion 2 fixed to the optical-fiber-core connecting portion fixing portion 14 is generated. Thus, it is possible to prevent an increase in transmission loss in optical communication.

A method for storing the optical fiber core and the connection portion in the optical fiber extra length storage case configured as described above will be described. The storing method described below is an example, and the method of storing the optical fiber core wire and the connection portion in the optical fiber extra length storage case of the present invention is not limited to the method described below.

The connecting portions 2 of the optical fiber cores 1 are individually fixed by fitting them into comb-shaped fins 15 provided in two rows in parallel with the optical fiber core connecting portion fixing portion 14. After fixing the connecting portion 2, an extra-long core wire 4 having a length required for maintenance, reconnection, etc. is taken on both sides of the connecting portion 2, and the extra-long core wire 4 is attached to the extra length of the optical fiber core. A loop is formed by looping along the extra length guide 12 in the storage portion 11 and stored in the optical fiber extra length storage portion 11. After that, the introduction core 3 of the optical fiber core 1 on the extension of the extra core 4 is set in the core introduction part 9 of the extra storage case 5, and the optical fiber 1 is put out of the extra storage case 5. By the guiding, the storage of the optical fiber core wire 1 and the connection part 2 is completed.

As described above, by storing the connection portion of the optical fiber core and the extra length thereof, it is stored in the introduction core introduced from the optical fiber core introduction portion and the extra length storage portion of the optical fiber core. The extra-long core is stored neatly without complicating it. When a specific optical fiber core is taken out, it can be easily taken out, and processing such as maintenance and reconnection can be efficiently performed.

[0022]

According to the optical fiber extra length storage case of the first aspect of the present invention, the bottom plate and both ends of the bottom plate in the longitudinal direction are provided.
Side plate provided opposite to the guide, and both ends of the side plate
An optical fiber extra length storage case which is formed in a box shape by an end plate provided in the optical fiber core and includes an optical fiber core introduction portion, an optical fiber extra length storage portion, and an optical fiber core connection portion fixing portion.
Therefore, the optical fiber core introduction part is one of the side plates
Provided at the intersection of both ends of the side plate and the end plate,
Optical fiber core extra length storage section
The extra long core wire stored in the part must not be less than the specified radius of curvature.
A ring-shaped extra length guide is provided, and further , the introduction core introduced from the optical fiber core introduction portion is provided between the optical fiber core introduction portion and the optical fiber extra length storage portion. A separation guide that separates the fiber from the extra-long core stored in the extra-fiber-length storage section, the introduction core and the extra-core.
So that the cords are stored neatly without being complicated
Extends from the end plate to the inside of the extra length storage case
The optical fiber core including the connection portion housed in the extra length storage case is easily taken out when taking out any specific optical fiber core for maintenance or reconnection. Processing such as maintenance and reconnection can be performed efficiently.

Further, according to the optical fiber excess length storage case according to claim 1 of the present invention, excess length core wire is accommodated in an optical fiber extra length accommodating portion in the optical fiber excess length storage section Since the extra length guide is provided so as not to be less than the predetermined radius of curvature, when the extra length center line is looped and the extra length loop is created, the extra length loop should be created according to the extra length guide Accordingly, even a worker who is unfamiliar with the work does not round the optical fiber core wire smaller than the allowable minimum bending diameter.

According to the optical fiber excess length storage case according to claim 2 of the present invention, an optical fiber extra length accommodating portion is provided on both sides of the optical fiber connecting portion fixing portion optical fiber excess Between the extra length guide of the long storage part and the optical fiber core connection part fixing part, the extra length core led out from the optical fiber core connection part fixed to the optical fiber core connection part fixing part is a predetermined length. Since the extra length protection guide is provided so as not to be less than the radius of curvature, a portion at the time of exposing the extra length core wire exposed from the reinforcing member of the connection portion fixed to the optical fiber core portion fixing portion is not slim. Bending does not occur, and an increase in transmission loss in optical communication can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of an optical fiber extra length storage case of the present invention.

FIG. 2 is a partial plan view illustrating an arrangement of a spare length protection guide of the optical fiber spare length storage case of FIG. 1;

FIG. 3 is a plan view showing an example of a conventional optical fiber extra length storage case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber core wire 2 Optical fiber core connection part 3 Introducing core wire 4 Extra long core wire 5 Extra length storing case 9 Core introducing portion 10 Separation guide 11 Optical fiber extra length storing portion 12 Extra length guide 14 Optical fiber Core wire fixing part 17 Extra length protection guide

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Kubota Examiner, Furukawa Electric Co., Ltd. Eiichi Yoshida, 2-6-1 Marunouchi, Chiyoda-ku, Tokyo (56) References JP-A-64-33507 (JP) A) JP-A-62-125305 (JP, A) JP-A-61-188102 (JP, U) JP-A-57-175106 (JP, U) JP-A-6-16907 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) G02B 6/00 G02B 6/24

Claims (2)

(57) [Claims] 1. A bottom plate and two longitudinal sides of the bottom plate.
Side plates provided facing each other and provided at both ends of the side plates
It formed in a box shape by being end plate, an optical fiber excess length accommodating case having an optical fiber introduction portion and the optical fiber excess length accommodating portion and the optical fiber connecting portion fixing portion, wherein The optical fiber introduction section is one of the side plates.
Are provided at the intersections of the both ends of the end plate and the end plate, and the extra length of the optical fiber
Make sure that the extra long core line stored in the storage section is less than the specified radius of curvature.
A ring-shaped extra length guide is provided to prevent
Further, between the optical fiber core introduction part and the optical fiber core excess storage part, the introduction core introduced from the optical fiber core introduction part and the optical fiber core excess storage part are stored. separating guide for separating the excess length cord was found the introduction core wire before
So that it can be stored neatly without complication
The inner side of the optical fiber extra length storage case from the end plate.
An optical fiber extra-length storage case, which is provided so as to extend from the optical fiber. 2. The optical fiber core excess storage portion is provided on both sides of the optical fiber core connection portion fixing portion. The extra length guide of the optical fiber core excess portion storage portion and the optical fiber core connection portion fixing portion are provided. An extra length protection guide is provided between the optical fiber core connection portion and the optical fiber core connection portion fixed to the optical fiber core connection portion fixing portion so that the extra length core wire guided from the optical fiber core connection portion does not become a predetermined radius of curvature or less. The optical fiber extra length storage case according to claim 1, wherein: