JPH08278417A - Holding member of juncture of coated optical fiber - Google Patents

Abstract

PURPOSE: To provide a holding member of the junctures of coated optical fibers capable of safely fixing or taking out the junctures of the coated optical fibers with good balance even in a narrow working space. CONSTITUTION: This holding member 10 of the junctures 3 of the coated optical fibers have juncture fixing parts 11 for fixing the junctures 3 of the coated optical fibers and extra length holding parts 12 for holding the extra lengths 4 of the junctures 3 of the coated optical fibers. The juncture fixing parts 11 of the junctures 3 of the coated optical fibers are freely attachably and detachably fixed to the extra length holding parts 12 for holding the extra lengths 4 of the junctures 3 of the coated optical fibers. Then, there is no need for taking out the extra length parts together in the case only the junctures 3 of the coated optical fibers are necessitated to be removed from the juncture fixing parts in maintenance, inspection, etc., and, therefore, the working efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable connecting portion and a holding member for holding the optical fiber cable connecting portion for holding the excess length.

[0002]

2. Description of the Related Art A connecting case of an optical cable is a storage case in which individual optical fiber cores of the optical cable are connected by an optical connector or fusion splicing, and the connecting part of the connected optical fiber cores is held together with its extra length. Etc. and is protected by a junction box. As shown in FIG. 5, a storage case 50 for holding a conventional connecting portion of an optical fiber core wire and an extra length thereof has a connecting portion fixing portion 52 for fixing the optical fiber core wire connecting portion 3 and an optical fiber core wire connecting portion. An extra length holding plate 53 for holding the portion of the extra length 3 of 3 is provided. Connection part fixing part 52
Is integrally fixed to a predetermined portion of the extra length holding plate 53, for example, the upper center portion.

A procedure for accommodating the connection portion 3 of each optical fiber core wire 2 of the optical cable 1 and the extra length 4 thereof in the storage case 50 and storing the connection portion of the optical cable in a connection box or the like will be described below. The individual optical fiber core wires 2 of the optical cable 1 are connected by an optical connector or fusion splicing, and the connecting portions 3 of the connected optical fiber core wires 2 are connected to the connecting portion fixing portion 52 of the storage case 50 one by one. A fixed number is fixed. After the connecting portions 3 of the predetermined number of optical fiber cores 2 are fixed to the connecting portion fixing portion 52, the extra length 4 on one side of these connecting portions 3 is collectively looped to form a loop. It is stored in the extra length holding plate 53. Similarly, the other extra length 4 is also looped together to form a loop, and the loop is stored in the extra length holding plate 53. In FIG. 5, reference numeral 54 is an extra length fixing portion for holding and fixing an appropriate portion of the extra length 4 so that the loop does not collapse.

In this way, the connection portion 3 of the predetermined number of optical fiber core wires 2 and the extra length 4 thereof are stored in the storage case 50.
A predetermined number of this storage case 50, in which the connection portion 3 of the optical fiber core wire 2 and the extra length 4 thereof are stored, is stored in a connection box or the like to protect the connection portion of the optical cable.

[0005]

The above-mentioned connecting portion of the optical cable is maintained and inspected at regular intervals. At the time of this maintenance and inspection, the storage case 50 stored in the connection box or the like is taken out, and the connection portion 3 of the predetermined number of optical fiber core wires 2 stored in the storage case 50 and its extra length 4 are once stored in the storage case. In some cases, all may be removed from 50. Alternatively, in order to check the optical cable due to a disconnection accident or the like, the storage case 50 temporarily stored in a connection box or the like is taken out, and a predetermined number of optical fiber core wires 2 stored in the storage case 50 are taken out.
In some cases, all or a predetermined number of the connecting portions 3 and the extra length 4 thereof are removed from the storage case 50 at one end.

By the way, the above-mentioned initial connection of the optical cable or the work such as maintenance and inspection thereafter is rarely performed in a place having a sufficiently large space, and a cavern or a manhole where the optical cable is laid is seldom used. It may be inside or on a pillar. Not limited to the above locations,
Delicate attention is required for the work of storing or removing the connection part of the optical fiber core.

When the connecting portion is taken out for maintenance or the like, the optical fiber core wires on both sides of the connecting portion may be picked out, or only the connecting portion may be picked out. The splice is generally rigid and heavier than the optical fiber core. Due to the imbalance in the force of holding the optical fiber core wires of both hands, it is easy to cause local bending due to the creases of the connection part. In many cases, the line is in a live state at the time of maintenance and inspection, and the loss increase is fatal even for an instant.

In the conventional storage case 50, since the connecting portion fixing portion 52 and the extra length holding plate 53 are integrated, the connecting portion 3 is fixed to the connecting portion fixing portion 52 or is taken out. There is a problem that the extra length holding plate 53 interferes and cannot be fixed or taken out in good balance.
Particularly in the case of an optical cable in which the number of optical fibers tends to increase due to the high density of the optical fiber optical fibers as in recent years, the above work is becoming more difficult. Further, when there is no working space as described above, the influence is particularly great. Furthermore, when the connection portion is taken out for maintenance or the like, it may be necessary to remove only the connection portion 3 from the connection portion fixing portion 52 of the storage case 50, but the extra length holding plate 53 is integrated. In addition, the portion of the extra length 4 held by the extra length holding plate 53 must be removed together, which causes a problem of poor work efficiency.

An object of the present invention is to solve the above-mentioned problems and to provide a holding member for an optical fiber connecting portion, which can securely fix or take out the connecting portion of the optical fiber even in a narrow working space. It is what

[0010]

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

The holding member for the optical fiber core connecting portion according to claim 1 of the present invention is the extra length for holding the extra length of the connecting portion fixing part for fixing the optical fiber core connecting portion and the optical fiber core connecting portion. A holding member for an optical fiber core wire connection part having a holding part, wherein the connection part fixing part of the optical fiber core wire connection part is an extra length holding part for holding an extra length of the optical fiber core wire connection part. It is characterized by being detachably fixed.

In the holding member for the optical fiber core connecting portion according to claim 2 of the present invention, the connecting portion fixing portion for fixing the optical fiber connecting portion can fix a plurality of optical fiber connecting portions together. Is characterized by.

[0013]

According to the present invention, the holding member for the optical fiber core connecting portion according to claim 1 is a surplus length for holding an extra length of the connecting portion fixing portion for fixing the optical fiber connecting portion and the optical fiber connecting portion. A holding member for an optical fiber core connecting part having a holding part, wherein a connecting part fixing part of the optical fiber connecting part is detachably attached to an extra length holding part for holding an extra length of the optical fiber connecting part. Since it is fixed to the optical fiber core wire connection part, the connection part fixing part can be fixed to a place where a safe work space can be secured and work can be performed, and the optical fiber core wire connection part can be fixed or taken out without losing the balance.

As a result, the local bending is not caused by the cracks in the connection portion, and the loss is not increased even during the maintenance and inspection of the hot line state. Further, when it is sufficient to remove only the optical fiber core connecting portion from the connecting portion fixing portion for maintenance or the like, it is not necessary to remove the extra length portion, so that the work efficiency is improved. Furthermore, when the size or the like of the optical fiber core connecting portion is different, for example, when the number of connecting portions to be fixed is different, only the connecting portion fixing portion needs to be replaced, which is economical.

According to the second aspect of the present invention, in the holding member of the optical fiber core connecting portion, the connecting portion fixing portion for fixing the optical fiber core connecting portion can collectively fix a plurality of optical fiber core connecting portions. Therefore, it becomes easy to hold and store the high-density optical fiber core wire.

[0016]

The present invention will be described below in detail with reference to examples. The same parts as those of the conventional one are designated by the same reference numerals and detailed description thereof will be omitted. FIG. 1 is a front view showing an embodiment of a holding member for an optical fiber core splicing portion of the present invention. Holding member 10 for optical fiber cable connection
Is a connection part fixing part 1 for fixing the optical fiber core wire connection part 3.
1 and a surplus length holding plate 12 that holds the surplus length 4 portion of the optical fiber core wire connection portion 3. The connecting portion fixing portion 11 is detachably fixed to a predetermined portion of the extra length holding plate 12.

As shown in FIG. 2, the connecting portion fixing portion 11 is a connecting portion holding portion 1 for holding a portion of the optical fiber core connecting portion 3.
3 and a plurality of core wire gripping portions 14 for gripping the tape-shaped optical fiber core wire 2 are provided on both sides thereof. Core wire grip 1
4 is a groove having a depth such that the optical fiber core wire 2 is hidden. On the connecting portion gripping portion 13 side of the core wire gripping portion 14, the upper part of the groove projects in a stepped manner, and tightly grips the creases of the optical fiber core wires 2 on both sides led out from the optical fiber core wire connecting portion 3. Is becoming narrower. By doing so, both ends of the connecting portion 3 of the optical fiber core wire are regulated, and it is possible to prevent local bending from occurring at both ends of the connecting portion 3.
At the same time, the loop with the extra length of 4 is forced to be large, and from this point also, it becomes difficult for a piece of music to occur. Two mushroom-shaped protrusions 15 are provided below the connecting portion fixing portion 11, and the connecting portion fixing portion 11 is attached to the extra length holding plate 12 by fitting the protrusions 15 into the recesses of the extra length holding plate 12. It is designed to be detachably attached.

Reference numeral 16 denotes a lid for preventing the optical fiber core wire connecting portion 3 fixed to the connecting portion fixing portion 11 from coming out of the connecting portion fixing portion 11. The lid 16 has a hole 18 that fits into a protrusion 17 provided on the connecting portion fixing portion 11 side, and the lid 16 is connected by fitting the protrusion 17 on the connecting portion fixing portion 11 side into this hole 18. It is detachably fixed to the portion fixing portion 11.

The lid 16 of the connecting portion fixing portion 11 is detachably fixed to the connecting portion fixing portion 11. As shown in FIG. 3, a hinge or the like is used below the lid 16A. The upper projection 1 by flexibly connecting to the connecting portion fixing portion 11
The lid 16A may be fixed by fitting the holes 7 and 7 together. By doing so, it is possible to prevent an accident in which the lid 16A is lost during work. Since other configurations are almost the same as those in FIG. 2, the same parts are denoted by the same reference numerals and detailed description thereof will be omitted. As shown in FIG. 4, the extra length holding plate 12 has a mushroom-shaped recess for fixing the connection portion fixing portion 11 by fitting the projection 15 of the connection portion fixing portion 11 on the upper portion of the extra length holding plate 12. Two fixing portions 19 are provided. The lower portion of the extra length holding plate 12 is folded back into an L shape to form a side wall 20. Claw-shaped extra length retainers 21 are provided at two locations on the side wall 20.

A holding member 1 for the above-mentioned optical fiber core wire connection portion.
An example of the procedure for accommodating the optical cable connection portion in 0 will be described below mainly with reference to FIG. The connection portion fixing portion 11 is fixed to a connection portion fixing portion fixing jig (not shown) installed in a place where there is no problem in work. The connection part fixing part fixing jig has a mushroom-shaped recess for fixing the connection part fixing part 11.

After fixing the connecting portion fixing portion 11 as described above, the connecting portions 3 of the individual optical fiber core wires 2 of the optical cable 1 are fitted and fixed in the connecting portion fixing portion 11 one by one.
Since the fixing work of the connection part 3 is performed in a place where there is no problem in work, there is no imbalance in the force of holding the optical fiber core wires 2 of both hands, and the bend of the connection part 3 causes local bending. There is nothing to do. After fixing the connecting portions 3 of the predetermined number of optical fiber core wires 2 to the connecting portion fixing portion 11, the lid 16 is fixed so that the fixed connecting portion 3 does not go out of the connecting portion fixing portion 11. After that, the connection part fixing part 1
The projection 15 of No. 1 is fitted into the fixing portion 19 of the extra length holding plate 12. Then, the extra length 4 of the connecting portion 3 is looped together to form a loop, and the connecting portion fixing portion 11 is removed from the connecting portion fixing portion fixing jig to remove the connecting portion fixing portion 11 from the extra length holding plate. The extra length 4 fixed to the fixing portion 19 of 12 and looped to form a loop is stored in the extra length presser 21 of the extra length holding plate 12 to hold the extra length 4. The above procedure mainly describes the case where the extra length 4 is long, but when the extra length 4 is short, the extra length 4 is first set.
May be looped to form a loop.

In this way, the holding member 10 of the optical fiber core connecting portion accommodates the connecting portions 3 of the predetermined number of optical fiber cores 2 and the extra length 4 thereof. A predetermined number of holding members 10 for the optical fiber connecting portion, which accommodates the connecting portion 3 of the optical fiber connecting portion 2 and the extra length 4 thereof, are accommodated in a connection box or the like to protect the connecting portion of the optical cable.

[0023]

As described above, according to the holding member for the optical fiber core connecting portion of the present invention, the connecting portion fixing portion for fixing the optical fiber core connecting portion and the optical fiber core are provided. A holding member for an optical fiber core wire connection part, comprising: an extra length holding part for holding an extra length of the connection part, wherein the connection part fixing part of the optical fiber core wire connection part is an extra length of the optical fiber core wire connection part. Since it is detachably fixed to the extra length holding part that holds the, the connection part fixing part can be operated in a place where work space can be secured safely and work space can be secured, and the optical fiber core wire connection part can be fixed without losing the balance, Or you can take it out. As a result, the local bending is not caused by the creases at the connection portion, and the loss is not increased even during maintenance and inspection in the live line state. Further, in the case where only the optical fiber core splicing part needs to be removed from the splicing part fixing part for maintenance and inspection, the extra length part does not have to be removed together, and the work efficiency is improved. In addition, since it is not necessary to directly grasp the connection part of the optical fiber core wire by hand when attaching and detaching the connection part fixing part to the extra length holding plate, local bending is unlikely to occur in the optical fiber core wire. Therefore, increase in transmission loss can be prevented. Furthermore, when the size of the optical fiber core wire connection part is different,
That is, when the number of connecting portions to be accommodated is different, only the connecting portion fixing portion having a size corresponding to the number of connectable portions to be accommodated needs to be replaced, and the extra length holding plate 12 does not need to be replaced, which is economical.

According to a second aspect of the present invention, in the holding member of the optical fiber core wire connecting portion, the connecting portion fixing portion for fixing the optical fiber core wire connecting portion collectively fixes the plurality of optical fiber core wire connecting portions. As a result, it is possible to hold the densified optical fiber
Easy to store.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a holding member for an optical fiber core splice according to the present invention.

FIG. 2 is a perspective view showing an example of a connecting portion fixing portion used for a holding member of the optical fiber core connecting portion of FIG.

FIG. 3 is a perspective view showing another example of a connecting portion fixing portion used for a holding member of the optical fiber core connecting portion of FIG.

FIG. 4 is a perspective view showing an example of an extra length holding plate used for a holding member of the optical fiber core connecting part of FIG. 1.

FIG. 5 is a front view showing an example of a conventional holding member for an optical fiber cable splicing section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical cable 2 Optical fiber core wire 3 Optical fiber core wire connection portion 4 Extra length 10 Holding member for optical fiber core wire connection portion 11 Connection portion fixing portion 12 Extra length holding plate 20 Side wall 21 Extra length holding

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Nagasawa 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Mikio Tsutsumi 1-1-1 Uchisaiwaicho, Chiyoda-ku, Tokyo No. 6 Nippon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A holding member for an optical fiber core connecting part, comprising a connecting part fixing part for fixing the optical fiber core connecting part and an extra length holding part for holding an extra length of the optical fiber connecting part. The optical fiber core wire connection is characterized in that the connection part fixing part of the optical fiber core wire connection part is detachably fixed to a surplus length holding part which holds a surplus length of the optical fiber core wire connection part. Part holding member. 2. The holding of the optical fiber core connecting section according to claim 1, wherein the connecting section fixing section for fixing the optical fiber core connecting section can collectively fix a plurality of optical fiber core connecting sections. Element.