JP2002296470A - Coated fiber branching member and method for branching fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that assembly work takes time and labor and respective coated fibers are overlapped, caught and twisted or the like. SOLUTION: A coated fiber aligning part provided with a plurality of passing holes capable of passing through the coated fibers and capable of aligning the coated fibers in a desired state of passing the respective coated fibers through prescribed passing holes is provided. The coated fiber aligning part provided with a plurality of recessed grooves instead of the passing holes is provided. A protective tube is arranged inside the passing holes or the recessed grooves, the coated fibers are passed through them and concentric wires are aligned. The coated fiber aligning part is attachable and detachable to/from a base material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for branching out each fiber core from a multi-core fiber cord in which a plurality of fiber cores are bundled, and each fiber core from the multi-core fiber cord. And a method for branching out.

[0002]

2. Description of the Related Art As a fiber core branching member for branching and extracting each fiber core from a multi-core fiber cord, there is a conventional one shown in FIG. The fiber core branch member is branched from a base material A, a cord fixing part C for fixing the multi-core fiber cord B to the base material A, and a multi-core fiber cord B fixed to the cord fixing part C. And a core alignment unit E for aligning the respective fiber cores D. As shown in FIG. 5 (b), a plurality of protective tubes G are arranged in a cylindrical main body F, and the core alignment part E is branched from a multi-core fiber cord B fixed to the cord fixing part C. Each of the fiber cores D (FIG. 5a) is passed through an arbitrary protective tube G so that the fiber cores D can be aligned.

[0003]

In the cord alignment portion E constituting the conventional branch member, a predetermined number of protective tubes G are arbitrarily arranged in an internal space of a main body F, and an adhesive H is filled in a gap therebetween. Since it is manufactured by filling, the arrangement state of the protective tubes G is different for each product. Therefore, the conventional fiber core branching member provided with such a core alignment part E has the following problems. (1) Connect the fiber core D to the protective tube G of the core alignment part E
It is difficult to access the inside and workability is poor. (2) Since the alignment state of the fiber cores D depends on the arrangement of the protective tubes G which are different for each product, the fiber cores D cannot always be aligned in the same state. Therefore, it takes time and effort to identify the wire number of the passed fiber core D. (3) Since it is not known which fiber core wire D is to be passed through which protection tube G, unless the fiber core wire D is actually passed through the protection tube G, the protection tube G cannot be passed through. The wire number of the passed fiber core D is not determined. (4) When any external force is applied to the branch member or the multi-core fiber cord B connected thereto, the bending force acting on each of the fiber cores D is greatly different, and the fiber cores D overlap with each other. Twisting, catching, and the like may occur, which may cause an increase in loss or disconnection.

[0004]

SUMMARY OF THE INVENTION One of the fiber core branching members of the present application is a cord fixing portion through which a multi-core fiber cord is inserted, and a multi-core fiber cord inserted through the cord fixing portion. A plurality of through-holes, comprising: a core aligning portion for aligning each fiber core; and a base material on which the cord fixing portion and the core aligning portion are set, wherein the core aligning portion is capable of passing the fiber core. The fiber cores can be aligned in a desired state by passing the respective fiber cores through predetermined through holes.

[0005] Another one of the fiber core branching members of the present application is a cord fixing part through which a multi-core fiber cord is inserted, and respective fiber cores branched from the multi-core fiber cord inserted through the cord fixing part. A core alignment part for aligning the wires, a base on which the cord fixing part and the core alignment part are set, wherein the core alignment part has a plurality of concave grooves capable of accommodating the fiber core, By accommodating each fiber core in a predetermined groove, the fiber cores can be aligned in a desired state.

[0006] Another one of the fiber core branching members of the present application is a multi-core fiber cord fixed to a cord fixing part, in which a protection tube is arranged in each through hole or concave groove of the cord alignment part. By passing each of the branched fiber cores through a protective tube disposed in a predetermined through hole or groove, the fiber cores can be aligned in a desired state.

[0007] Another one of the fiber core branching members of the present application is one in which both or one of the cord fixing part and the core alignment part is detachable from the base material.

The method for branching a fiber core of the present application is a method for branching a fiber core from a multi-core fiber cord using any one of the branching members described above. Insert and fix to the fixed part,
Each of the fiber cores branched from the multi-core fiber cord is passed through the through-hole of the core alignment part, housed in the groove, or in the protection tube arranged in the through-hole or the groove. The cord fixing portion and the core wire aligning portion are mounted on the base material after the wires are aligned in a desired state.

[0009]

(Embodiment 1) An embodiment of a fiber core branching member and a fiber core branching method according to the present invention will be described with reference to FIGS. The fiber core branching member shown in the present embodiment is capable of branching out each fiber core from a multi-core fiber cord in which eight fiber cores are bundled, and as shown in FIG. It includes a material 1, a cord alignment unit 2, and a cord fixing unit 3. In addition, the base material 1, the core wire alignment part 2, and the cord fixing part 3 are separately provided.

[0010] As shown in FIG.
And an upper material 10 to be put on it.
On the opposing inner surfaces of the upper member 10 and the lower member 11, there are formed a fixing portion setting recess 12 in which the cord fixing portion 3 can be fitted and an alignment portion setting recess 13 in which the core wire aligning portion 2 can be fitted. And the inner surfaces of both materials 10 and 11 are abutted against each other to form a base material 1
In this configuration, the fixing portion setting recesses 12 and the alignment portion setting recesses 13 abut against each other, and a fixing portion housing space in which the cord fixing portion 3 can be housed and an alignment portion in which the core wire aligning portion 2 can be housed. The accommodation spaces are respectively formed.

[0011] As shown in FIG.
It has a through hole 21 that penetrates from one end surface to the other end surface and through which the multi-core fiber cord 20 can be inserted. A possible locking part 23 is provided in a protruding manner. Accordingly, after inserting and fixing the multi-core fiber cord 20 through the through hole 21, the multi-core fiber cord 20 is fitted into the fixing portion setting concave portion 12 of the lower member 11, and the upper member 10 is put on the lower member 11 so as to cover the base member 1. With this configuration, the cord fixing part 3 is accommodated in the fixing part accommodation space, and the locking part 23 of the fixing part 3 is locked to the locking receiving part 22, whereby the multi-core fiber cord 20 is Is fixed to the substrate 1.

As shown in FIG. 1, the core line aligning section 2 has a tube retaining section 35 in which four concave grooves 30 are arranged in parallel in the width direction.
And a protective tube 3 arranged and fixed in the concave grooves 30.
It consists of 1. Specifically, as shown in FIG. 2, each concave groove 30 is formed to have a substantially U-shaped cross section, and the width thereof is set to be equal to or slightly larger than the diameter of the protective tube 31, and Is set to be twice or slightly larger than the diameter of the protective tube 31. The protective tube 31 is a nylon tube having a diameter of about 0.9 mm through which the respective fiber core wires 33 branched from the multi-core fiber cord 20 pass. As shown in the figure, these protective tubes 31 are arranged and fixed in a two-by-two manner in each of the concave grooves 31, and as shown in FIG. By passing each of the fiber cores 33 branched from the fiber cord 20 through a predetermined protective tube 31, the fiber cores 33 can be aligned in the arrangement state of the protective tubes 31.

The following describes how to branch and extract each fiber core from a multi-core fiber cable using the fiber core branching member of the present invention having the above-described structure. (1) The multi-core fiber cord 20 is inserted into and fixed to the through hole 21 of the cord fixing portion 3, and each fiber core 33 is branched from the multi-core fiber cord protruding from the through hole 21. Specifically, the adjacent fiber cores 33 are split into individual fiber cores 33 by splitting each other in the axial direction. (2) Two protective tubes 31 are arranged one above the other in the concave groove 30 of the tube retaining portion 35, and the two protective tubes 31 are fixed in the concave groove 30 with an adhesive to manufacture the core wire aligning portion 2. Here, it is preferable that the inlet of each protective tube 31 coincides with the beginning of the groove 30 in which the protective tube 31 is accommodated, and for that purpose, the entrance of the protective tube 31 coincides with the beginning of the groove 30. Then, the protection tube 31 is housed in the groove 30 or the extra length of the protection tube 31 protruding from the starting end of the groove 30 is cut afterwards. In any case, since the position of the protective tube 31 is fixed by the concave groove 30, even if it is not a skilled person,
The protection tube 31 can always be arranged in the same state. In addition, after performing the said process, you may implement the said process (1). (3) Each of the branched fiber cords 33 is passed through a predetermined protective tube 30 of the cord aligning section 2 so as to be in the state shown in FIG. Here, if the wire numbers of the fiber core wires 33 passed through the respective protection tubes 31 are determined in advance in a unified manner, the fiber numbers of the fiber core wires 33 need not be confirmed one by one later. From the protective tube 31 through which the core wire 33 is passed, the wire number of the fiber core wire 33 passed through the tube 31 can be grasped. For example, as shown in FIG.
Through the first core wire 33, and the lower protective tube 3 in the same row.
It is defined that the 1st wire passes through the 2nd wire 33, and the 8th wire below the protection tube 31 in the leftmost row in order. (4) As shown in FIG. 1, the cord fixing portion 3 and the core wire aligning portion 2 are fitted into the fixing portion setting concave portion 12 and the aligning portion setting concave portion 13 of the base material 11, respectively.
The position of the cord fixing part 3 and the core wire alignment part 2 is adjusted so that no excessive bending force is applied, and then the adhesive is applied to several places in the axial direction of the fiber core 33 to lower the base material 11. Fixed to. (5) Cover the upper material 10 on the lower material 11 and cover it. still,
For example, an optical connector is attached to the other end of the protection tube 31 (not shown), and a fiber core 33 passed through the protection tube 31 is connected to the optical connector.

(Embodiment 2) Another embodiment of the fiber core branching member of the present invention will be described with reference to FIG. The basic configuration of the fiber core branching member shown in the present embodiment is the same as that shown in the first embodiment. What is different is the structure of the cord alignment unit.

As shown in FIG. 4, the core wire alignment portion 2 of the fiber core branch member shown in this embodiment has a substantially U-shape in plan view and an opening through which the protection tube 31 can be inserted in one longitudinal direction. The protection tube 3 inserted in the opening 40 is formed on the side opposite to the opening 40.
It comprises a tube retaining portion 35 in which eight through-holes 41 through which 1 can be inserted are formed in a uniform lattice shape in the vertical and horizontal directions, and a protective tube 31 inserted and fixed in each of the through-holes 41.

The method of branching and extracting each fiber core from a multicore fiber cord by the fiber core branching member of the present invention having the core alignment part 2 having the above structure is basically shown in the first embodiment. Method is the same as The difference is that one end of the protective tube 31 is inserted and fixed in each through hole 41 of the tube retaining portion 35 to manufacture the core wire aligning portion 2.

(Embodiment 3) In the above-described embodiment, the fiber core wires are passed through the protection tube of the core wire alignment portion to align them, but the protection tube is omitted and the inside of the concave groove of the core wire alignment portion is omitted. Alternatively, the fiber cores may be aligned directly by passing the fiber cores directly into the through holes. Again,
Since the position of each fiber core is fixed by the groove or through-hole, the fiber core can always be aligned in the same state even by a non-expert, and each fiber core is passed through each groove or through-hole. By unifying the wire numbers of the fiber cores in advance, it becomes easy to grasp the wire numbers of the fiber cores later.

In the above embodiment, the fiber core branching member and the fiber core branching method of the present invention have been described by taking as an example a case where each fiber core is branched and taken out from an eight-core multi-core fiber cable. The multi-core fiber cable that can be branched by the fiber core branching member and the fiber core branching method of the present invention is not limited to eight cores. For example, it is also possible to branch and take out each fiber core from a six-core or twelve-core multi-core fiber cable. However, according to the number of cores of the multi-core fiber cable, not only increase the number of grooves and through holes in the core alignment part, but also design and change the dimensions and shapes of other necessary parts accordingly. Of course you do.

[0019]

According to a first aspect of the present invention, there is provided a fiber core branching member provided with a plurality of through holes through which a core fiber can be passed in a core alignment part, and each fiber core branched from a multicore fiber cord. Are passed through a predetermined through-hole, so that the fiber cores can be aligned in a desired state. The following effects are obtained. (1) A predetermined fiber core is passed through a predetermined through-hole. By simply doing so, the plurality of fiber cores can always be aligned in the same state. Therefore, even a non-expert can easily and reliably align the fiber core wires in a predetermined state,
There is no variation among workers. (2) If the wire numbers of the fiber core wires to be passed through the respective through holes are determined in advance, the wire number can be grasped without checking the wire number of the fiber core wires one by one later. (3) Since the fiber cores are always uniformly aligned, even if an external force is applied to the branch member or the multi-core fiber cord connected to the branch member for some reason, there is a large difference in bending force acting on each fiber core. Since it does not occur, the fibers do not overlap with each other, torsion, snagging, and the like do not occur, and there is no possibility of increasing loss or disconnection.

A fiber core branching member according to claim 2 is
By providing a plurality of grooves capable of accommodating fiber cores in the core alignment part and accommodating the fiber cores in predetermined grooves, the fiber cores can be aligned in a desired state. In addition to the above, the following effects are particularly obtained. (1) Since it is easier to drop the fiber core wire from above the concave groove into the groove than to pass it through the hole,
Workability is improved, and work time is reduced.

The fiber core branching member according to claim 3 is
Protective tubes are disposed in the respective through holes or grooves of the core alignment portion, and the fiber cores are passed through the protective tubes disposed in the predetermined through holes or grooves, thereby forming the fiber cores. Since the line can be aligned to the desired state,
In addition to the above effects, the following effects are particularly obtained. (1) Since the fiber core is protected by the protective tube, it is hardly damaged or broken.

A fiber core branching member according to claim 4 is
Since both or one of the cord fixing portion and the core wire alignment portion can be attached to and detached from the base material, the following effects are particularly obtained in addition to the above effects. (1) A multi-core fiber cord is fixed to a cord fixing part, and respective cords branched from the multi-core fiber cord are aligned by a cord alignment part. Can be attached to the material. Therefore,
The work is easier and the work time is shorter than when the work is performed in a state where the cord fixing part and the core wire alignment part are fixed to the base material.

In the method of branching a fiber core according to the fifth aspect, each fiber core is branched out from a multi-core fiber cord by using the fiber branching member having the above-described effect, and the same effect as described above is obtained. Have.

[Brief description of the drawings]

FIG. 1 is an exploded explanatory view showing an example of an embodiment of a fiber core branching member of the present invention.

FIG. 2 is an enlarged explanatory view of a core line aligning unit shown in FIG. 1;

FIG. 3 is an explanatory end view of the core wire alignment unit shown in FIG. 1;

FIG. 4 is an enlarged explanatory view showing another example of the cord alignment unit.

FIG. 5A is an explanatory view showing an example of a conventional fiber core branching member, and FIG. 5B is an enlarged explanatory view of a core aligning portion shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base material 2 core wire aligning part 3 cord fixing part 10 upper material 11 lower material 12 fixing part setting concave part 13 aligning part setting concave part 20 multi-core fiber cord 30 concave groove 31 protective tube 33 fiber core wire 35 tube retaining part 40 opening 41 through hole

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masato Shiino 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. F-term (reference) 2H001 BB27 FF06 2H038 CA36 CA52 5G355 AA10 BA11 CA04

Claims (5)

[Claims] 1. A cord fixing portion into which a multi-core fiber cord is inserted, a core aligning portion for aligning respective fiber cores branched from the multi-core fiber cord inserted into the cord fixing portion, and the cord fixing portions And a base material on which the core alignment part is set. The core alignment part includes a plurality of through-holes through which the fiber cores can pass, and each of the fiber cores is connected to a predetermined through-hole. The fiber core branching member is characterized in that the fiber cores can be aligned in a desired state by causing the fiber cores to be aligned. 2. A cord fixing section through which a multi-core fiber cord is inserted, a core aligning section for aligning respective fiber cores branched from the multi-core fiber cord inserted through the cord fixing section, and the cord fixing section. And a base on which the core alignment part is set, wherein the core alignment part has a plurality of grooves capable of accommodating fiber cores, and accommodates the respective fiber cores in predetermined grooves. The fiber core branching member can thereby arrange the fiber cores in a desired state. 3. The multi-core optical fiber branching member according to claim 1, wherein a protective tube is arranged in each of the through holes or the grooves of the optical fiber aligning portion, and is fixed to the cord fixing portion. By passing each of the fiber cores branched from the fiber cords into a protective tube disposed in a predetermined through hole or groove, it is possible to align the fiber cores in a desired state. A fiber core branching member. 4. The fiber core branching member according to claim 1, wherein at least one of the cord fixing part and the core alignment part is detachable from the base material. Fiber core branching member. 5. A method for branching and extracting a fiber core from a multi-core fiber cord using the fiber core branch member according to claim 4, wherein the multi-core fiber cord is inserted into and fixed to a cord fixing part. Then, each of the fiber cores branched from the multi-core fiber cord is passed through the through-hole of the core alignment portion, housed in the concave groove, or protected in the through-hole or the concave groove. A method of branching a fiber core, comprising: connecting a cord fixing portion and a core wire alignment portion to a base material after the wires are aligned in a desired state by passing through a tube.