JPH1020129A - Extra length treating case of optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to avoid housing of connected extra lengths and separate coated fibers at the same point and to carry out the work for housing the extra lengths in the separated state of an extra length housing case and a separate coated fiber housing case by separating both cases. SOLUTION: The extra length treating case 4 for optical fibers 1 is formed separable to the extra length housing case 5 and the separate coated fiber case 6. The coupling of these cases is executed by inserting fixing pawls 21 formed in the lower part of the extra length housing case 5 into fixing holes 22 formed at the separated coated fiber housing case 6. The extra length housing case 5 for housing the connected extra lengths of the optical fibers 1 and the separated coated fiber housing case 6 are separated and, therefore, the parts of the single-core separate coated fibers 3 are kept free from undue stresses even at the time of carrying out the work described above with the extra length treating case 4. The possibility of damaging the separate coated fibers 3 is, therefore, lowered. Then, there is no need for providing the parts of the separate coated fibers 3 with special protection, such as reinforcement with cords or coating and the cost thereof is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case for processing an extra length of an optical fiber, which stores an extra connection length of the optical fiber at a connection portion of the optical fiber.

[0002]

2. Description of the Related Art In an optical fiber network, when a connection is made for the purpose of branching or connection change, the connection portion has a certain extra connection length of the optical fiber in preparation for future branching, connection change or connection work failure. Is generally provided. For this reason, the connection part is usually provided with an extra length storage part for storing the extra connection length. FIG. 4 shows an example of the structure of such a surplus storage section. Here, a case is described as an example in which connection is performed by a connector in a subscriber optical communication network using an optical fiber tape. FIG.
2A shows a converted core 11 constituting a connector and a connection extra length, and FIG. 2B shows a case where the converted core 11 is stored in a case 12 configured as a surplus storage portion. It shows the state.

[0003] The conversion core 11 is a multi-core optical connector 13 as defined in JIS C5981.
A cord portion 14 which is coated by reinforcing the optical fiber tape, a single-core separating portion 15 serving as a branch point when separating the optical fiber tape into a single core, a separated core 16 which separates each single core of the optical fiber tape, and SC connector plug 17 which is an SC type optical connector when connector is connected by push-pull method
It is composed of The length of the cord section 14 is set with a margin, and is configured to function as an extra connection length. When using the converted core wire 11 for actual on-site construction, an MT connector 19 is provided at the tip of a multi-core optical fiber cord 18 to be connected to a connector.
The conversion core 1 prepared in advance is connected to the connector 19.
1 are connected to each other, and this converted core wire 11 is used as a connection portion for connector connection. Specifically, the MT connector 13 of the conversion core 11 is connected to the MT connector 19, and the cord portion 14 and the separation core 16 are wound as shown in FIG. It is housed inside the case 12 together with the MT connectors 13 and 19. The case 12 has an SC connector plug 17 through which an SC connector plug 17 can be inserted.
A connector adapter 20 is provided. In the above example, the cord portion 14 of the converted core wire 11 has an extra connection length, and is wound and stored inside the case 12. The case 12 functions as an extra-length storage section for storing the extra connection length.

[0004]

However, in the extra length storage portion as described above, the extra connection length portion and the separated core portion are accommodated in the same place, and the wiring is cluttered. For example, at the time of wrapping and storing the extra connection length at the site construction, there is a problem of incorrect wiring, or accidental touching the separated core wire, resulting in damage to the core wire, increase in breakage and loss, etc. There has been a problem that has an adverse effect.

In order to avoid such a problem,
If a protective member is provided by, for example, forming a reinforcing cord at the portion of the separated core wire, a problem has arisen in terms of the cost required for installing the protective member. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and provides an optical fiber that protects separated core wires separated from an optical fiber cord at a connection portion of the optical fiber, and simultaneously stores an extra connection length. The purpose is to provide an extra length processing case.

[0006]

In order to solve the above-mentioned problems, the following means have been adopted in the excess length processing case of the optical fiber of the present invention. An optical fiber extra length processing case according to claim 1, wherein the optical fiber extra length processing case is an optical fiber extra length processing case for storing an extra connection length at a connection portion of the optical fiber and protecting the separated core wire. And a separation core storage case for storing a separation core branched from an optical fiber. The extra length processing case for the optical fiber is provided with an extra length storage case for storing the extra connection length of the optical fiber, and a separation core storage case for storing the separation core branched from the optical fiber. Since the extra connection length and the separated core wire are not stored in the same location,
It is possible to avoid an adverse effect on the separated core wire due to the fact that the excess connection portion comes into contact with the separated core wire during connection work or storage.

The extra length processing case of the optical fiber according to the second aspect is the extra length processing case of the optical fiber according to the first aspect, wherein the extra length storage case and the separated core storage case are separable. It is characterized by being. Since the extra length storage case of the optical fiber can separate the extra length storage case and the separated core storage case, the extra length storage case is stored at another position in a state where the separated core is stored in the separated core storage case. Work can be done. Therefore, not only is the separation of the storage portion between the separation core wire and the connection extra length protected, the separation core wire at the time of the extra length storage operation is protected, but also the workability of the extra length storage is improved. .

The extra length processing case of the optical fiber according to the third aspect is the extra length processing case of the optical fiber according to the first or second aspect, wherein the extra length storage case has one side joined by a hinge and the hinge is connected. It is composed of a pair of extra-length storage trays that can be opened and closed as the center, and these extra-length storage trays are located on the same axis at the respective center portions when these extra-length storage trays are fitted. A surplus length processing unit is provided, which is capable of winding the surplus connection length in the figure of eight when the surplus length storage tray is opened. In this case, the extra length storage case is configured by fitting a pair of openable and closable extra length storage trays joined by hinges. With these extra length storage trays opened, the extra connection length can be wound in a figure eight shape around the extra length processing unit provided at the center of each extra length storage tray. ,
By closing the extra length storage tray, it is possible to store the extra connection length inside the extra length storage case.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a view showing an optical fiber surplus length processing case 4 of the present invention.
As shown in the figure, the excess length processing case 4 of the optical fiber is separable into a remaining length storage case 5 and a separated core storage case 6. The fixing claw 21 provided at the lower part is inserted into the fixing hole 22 provided in the separated core wire storage case 6.

The separation core storage case 6 is a member having a box shape as shown in FIG.
1. The front plate 32, the rear plate 33, and the side plates 34, 35, and the upper portions of the rear plate 33 and the side plate 34 are notched. The front plate 32 has an SC optical connector.
The connector adapter 24 is provided, and the side plate 35 is provided with a fixing bracket 25 used for fixing the entire excess-length processing case 4 at an installation location.
Further, at the center of the bottom plate 31, an annular extra-length processing ring 26 capable of winding an optical fiber tape is provided.
On the other hand, as shown in FIG. 2, the extra-length storage case 5 is configured by extra-length storage trays 7 and 8 that can be freely opened and closed. The extra length storage tray 7 includes a bottom plate 41 and side plates 42, 43, 4
The extra length storage tray 8 includes a bottom plate 46 and side plates 47, 4849, and 50. A surplus processing unit 9 is provided at the center of the bottom plate 41, and a surplus processing unit 10 is provided at the center of the bottom plate 46. Notches 45a and 50a are provided at the centers of the side plates 45 and 50. I have. The side plates 45 and 50 are connected to each other by a hinge (not shown), and the extra length storage tray 8 can be rotated around the hinge in the direction shown by the arrow A. FIG. 2 shows the state when the extra length storage trays 7 and 8 are opened, but when these are fitted, the extra length storage tray 8 moves to the position indicated by the dashed line. Becomes When the extra length storage trays 7 and 8 are fitted, the extra length storage tray 8 is located at the upper level, and the extra length storage tray 7 is located at the lower level.
The bottom plate 41 of the extra length storage tray 7 serves as the bottom surface of the extra length storage case. An opening (not shown) is provided in a part of the bottom plate 41, and is configured so that an optical fiber or the like can be inserted toward the separation core storage case 6.
The side plates 44 and 42 have openings 27 and 28, respectively.

Normally, when the excess length processing case 4 for optical fiber is shipped from the factory, a tape core (with an MT connector) is required.
Then, one end of the tape core is cut off to separate it into a single core, and the separated core 3 whose end is connected to a connector is stored in advance in an excess length processing case 4 of an optical fiber. At this time, the separated core wire 3 whose distal end is already connected to the connector is stored in the separated core wire storage case 6, and the tape core is stored in the excess length processing section 9 provided in the upper excess length processing case 5. , And wound appropriately and stored. The above package is carried to the connection site as a unit. The procedure for applying the present invention at the connection site is as follows. Here, the optical fiber 1 is an optical fiber tape having four cores, which is reinforced and coded as required. First, the excess length processing case 4 is separated into the excess length storage case 5 and the separated core storage case 6. The extra length storage case 5 is left open, and the tape core 51 in the case and connected to the separation core 3 is taken out from the extra length processing case 4. The end of the optical fiber 1 is provided with a four-core MT connector 1a, which is connected to the MT connector 51a on the side of the tape core 51 in the case. Next, the optical fiber 1 MT-connected to the tape core 51 is wound around the extra-length processing units 9 and 10 in a figure-eight shape. The state of the optical fiber 1 and the tape core 51 at this time is as shown in FIG. If it is considered that the optical fiber 1 has been wound to a sufficient length as the extra connection length, then the extra length storage trays 7 and 8 are fitted to complete the storage of the extra connection length 2 of the optical fiber 1.

[0012] Tape core 51 connected to optical fiber 1
Is inserted through an opening (not shown) provided in the bottom plate 41 of the extra-length storage case 5 and stored in the separated core storage case 6. FIG. 3 shows the state of the inside of the separated core wire storage case 6 from above at this time. Some extra length of the tape core 51 is also required in the separated core storage case 6, and the tape core 51 is wound around the extra length processing ring 26 by that much. The tape core wire 51 is wound around the extra-length processing ring 26, and is formed into four separated core wires 3 whose tips are cut off and separated into single cores while maintaining a necessary bending radius. An SC type optical connector plug is attached to each end of the separated core wire 3, and the SC type optical connector plug is inserted into the case inside the SC type optical connector adapter 24 to connect the optical plug from the outside. It is possible. When the storage of the extra connection length 2 and the tape core 51 is completed as described above, finally, the extra length storage case 5 is fixed to the separated core storage case 6. At this time, the opening 28 plays a role of inserting the separation core 3.

In the extra length processing case 4, the extra length storage case 5 for storing the extra connection length of the optical fiber 1 and the separated core wire storage case 6 are separated even when performing the above operation. For this reason, an unreasonable force is less likely to be applied to the portion of the single-core separated core wire 3, and the possibility of damaging the separated core wire 3 is reduced. Therefore, it is not necessary to provide special protection such as cord reinforcement or coating on the portion of the separation core wire 3, and the cost is reduced accordingly. Also,
In the present invention, when storing the extra connection length, the optical fiber 1 can be wound around the extra length processing units 9 and 10 and accommodated in a figure-eight shape, so that the optical fiber 1 is not twisted. There are advantages.

The present invention is not limited to the above-described embodiment, but can be freely changed according to the required form of the optical fiber and the connector, the working convenience, and the like. is there. For example, in the above-described embodiment, a four-core optical fiber tape is used for the optical fiber 1, but instead, four or more or a plurality of optical fiber tapes or an optical fiber cord reinforced with the same is used for the optical fiber 1. May be used. Further, the above embodiment is applied to the case where the core fiber 51 connected to the optical fiber 1 is separated into single cores.
Instead of the optical connector, an MPO optical connector is preferably used. By the way, the MPO type optical connector is an MT type optical ferrule for a multi-core optical connector whose tip is obliquely polished, and is precisely positioned with two positioning pins.
This is a push-pull type optical connector similar to the type optical connector.

Further, in the above-described embodiment, a part of the tape core 51 before being separated into a single core is wound around the extra length processing ring 26, but the extra length processing ring 26 is wound around the tape core 51. It is provided in order to maintain a certain bending radius for, for example, due to work convenience,
When the length of the separation core wire 3 is further increased, the separation core wire 3 may be wound around the extra length processing ring 26.

Further, in the above-described embodiment and its modified examples, the multi-core single-core separated core wire with the connectors on both sides is prepared and shipped in advance in the factory, but the gist of the present invention is to handle with care. It is necessary to separate the single core portion and the other tape portions. Therefore, the optical tape core wire derived from an external optical cable or the like can be directly used as the extra length storage case 5.
It can be said that the present invention also includes a storage system in which the separation part is branched in the separation core storage case 6 and the distal end of the separation core is terminated with a connector. Further, the excess fiber processing case of the present invention can be used, for example, for processing excess connection length in a termination box, an optical distribution board, or an optical distribution rack.

[0017]

According to the present invention, there is provided an optical fiber extra length processing case for storing an extra length of an optical fiber, and a separate optical fiber housing for storing a separated optical fiber branched from the optical fiber. Since the case is separated, the extra connection length and the separation core wire are not stored in the same place, and the operation of storing the extra length can be performed by separating the two cases. For this reason, it becomes difficult to apply an excessive force to the separated core wire, and at the time of connection work or extra length storing work, the separated core wire comes into contact with the separated core wire, thereby causing adverse effects such as damage, breakage, and increased loss of the separated core wire. Is less likely to be given. In addition to this, it is not necessary to provide special protection to the separated core portion, which not only reduces the cost but also improves the workability when storing the extra length. Further, the excess length processing case of the optical fiber of the present invention can store the excess connection length in a state where the excess connection length is wound around the extra length processing portion in the shape of an eight, and the optical fiber is twisted. No effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an optical fiber extra length processing case of the present invention.

FIG. 2 is a perspective view showing in detail a surplus storage case which is a part of the embodiment of the present invention shown in FIG.

FIG. 3 is a plan view showing a separated cord storage case which is a part of the embodiment of the present invention shown in FIG. 1;

FIG. 4 is a partially enlarged view and a front view showing a conventional technique in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical fiber, 2 ... Extra connection length, 3 ... Separation core wire, 4 ... Extra length processing case, 5 ... Extra length storage case, 6 ... Separation core wire storage case, 7, 8 ... Extra length storage tray, 9, 10 extra length processing unit

Claims (3)

[Claims] An optical fiber extra length processing case (4) for accommodating an extra connection length (2) at a connection portion of an optical fiber (1) and protecting a separated core wire (3). Extra length storage case (5) for storing the extra connection length (2) of the optical fiber (1), and a separation core storage case (6) for storing the separation core (3) branched from the optical fiber (1). (4) An optical fiber excess length processing case (4). 2. An excess length processing case (4) for an optical fiber according to claim 1, wherein the excess length storage case (5) and the separated core storage case (6) are separable. Characteristic extra fiber processing case (4). 3. The excess length processing case (4) according to claim 1, wherein the excess length storage case (5).
Is composed of a pair of extra-length storage trays (7, 8) whose one side is connected by a hinge and can be opened and closed around the hinge. The extra-length storage trays (7, 8) When these extra length storage trays (7, 8) are fitted, they are located on the same axis, and these extra length storage trays (7, 8)
8) An extra length processing case for an optical fiber, wherein extra length processing sections (9, 10) capable of winding an extra connection length (2) in an eight-shape in an opened state are provided. 4).