JPH0915429A - Optical wiring rack - Google Patents

Abstract

PURPOSE: To provide an optical wiring rack with which handings of optical fiber cords, etc., become easy and which is capable of easily coping even in the case even the changing of one part of optical fiber cords or tape cords is performed. CONSTITUTION: A cable total length processing space 21 is provided in between a branching module mounting space 20 in which many branching modules 5 connecting tape cords 8 led out from optical cables via optical connectors for brach-connect and optical fiber core wirings are housed and a cable mounting space 22 in which intra-office cables 9 constituted of optical cables and outside cables in which optical fiber core wirings are bound are housed and optical fiber cord rolling reels 25, 26 for rolling cords equivalent to excess lengths of optical fiber cords 13 or tape cords 8 are plurally provided with the same pitch as that of branching modules 5 in the cable total length processing space 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical wiring rack for branching an optical cable to an optical fiber core by an optical connector connection in an optical fiber network.

[0002]

2. Description of the Related Art In an optical fiber network, in order to branch and connect an optical cable to an optical fiber core by connecting an optical connector, an optical wiring rack is used which terminates a large number of internal and external optical fibers to form a large group. In particular, as an optical wiring rack used for a subscriber transmission line, an FTM (Fiber) is used.
Termination Module) is used. FIG. 3 is a diagram showing a conventional optical wiring rack applied to an FTM. Reference numeral 1 in the figure denotes an optical wiring rack, and this optical wiring rack 1
Is divided into a terminal housing rack 2 and a cable housing rack 3. The terminal accommodating rack 2 has shelves 2a, ... Partitioned in a plurality of stages at equal intervals by a horizontally arranged partition plate 4, and branch modules 5, ... Are arranged on the upper sides of the shelves 2a. The branching modules 5, ... Are each configured by a plate-shaped package and connect the tape cord 8 led out from the outside optical cable 7 and the optical fiber core wire 10 of the inside optical cable 9. is there.

A terminal plate 11 is fixed to an opening on the same side of each step of the terminal housing rack 2 so as to substantially cover the opening. The terminal plate 11 has an end portion of the branch module 5 ,. The adapter 12 attached to is placed and fixed. The adapter 12 has a function as an optical connector for branch connection for connecting the tape cord 8 and the optical fiber core wire 10, and a plurality of terminals arranged on the outside of the adapter 12 have the optical fiber inside the office. The fiber core wire 10 is connected. Further, the tape-shaped tape cord 8 is led out from the branch module 5 from the back surface side in FIG.

[0004]

The above-mentioned conventional optical wiring rack has the following drawbacks. For example, taking the side of the intra-station optical cable 9 as an example, the branch module 5
Optical fiber 10 connected to the terminal of the adapter 12 of the
Is usually covered with a coating such as polyvinyl chloride containing Kevlar to form the optical fiber cord 13.

In the currently used optical wiring rack, the number of optical fiber cores to be branched and connected is about 1000. However, when changing this to a high density mounting of about 2000 or 4000, the current Kevlar is used. 2-4 while covering the optical fiber core wire 10 with a coating such as polyvinyl chloride
The double mounting causes a problem that the covering of the optical fiber cord 13 becomes very troublesome. Therefore, in the case of a single-core fiber, an attempt has been made to reduce the diameter to have a nylon coating structure, and in the case of a multi-core fiber, to have a tape cord structure, but this causes a problem in strength. The optical fiber core wire 10 may be broken during mounting. Further, even if it can be mounted, a new problem arises that the handling of the optical fiber cord 13 becomes very troublesome. In other words, for example, even if an attempt is made to change the wiring of only some of the optical fiber cords 13, it is very difficult to take out only one of the optical fiber cords 13 from the fact that many optical fiber cords 13 are intricately entangled. It is troublesome and takes a lot of work time. The same problem occurs on the outside optical cable 7 side as well.

The present invention has been made in view of the above circumstances, and facilitates the handling of optical fiber cords and the like, and facilitates the wiring change of only some of the optical fiber cords or tape cords. It is an object of the present invention to provide an optical wiring rack that can be dealt with.

[0007]

In order to achieve the above object, the invention according to claim 1 is an optical wiring rack for branch-connecting an optical cable to an optical fiber core wire by an optical connector connection, which is a branch connection. Branch module mounting space for accommodating a large number of branch modules for connecting the tape cord derived from the optical cable through the optical connector and the optical fiber core wire, and an external cable and an optical fiber core wire configured by the optical cable A cable full length processing space is provided between the cable mounting space that stores the bundled intra-station cable and the extra length of the optical fiber cord formed by coating the optical fiber core wire in the cable full length processing space. It is characterized in that a plurality of reels for winding up the optical fiber cord for winding up are provided.

According to the second aspect of the invention, a plurality of tape cord winding reels for winding an extra length of the tape cord are provided in the cable full length processing space in place of the optical fiber cord winding reel. It is characterized by

According to the third aspect of the invention, in the cable full length processing space, in addition to the optical fiber code winding reel, a plurality of tape cord winding reels for winding an extra length of the tape cord are provided. It is characterized by being

According to a fourth aspect of the present invention, the winding reels are arranged at the same pitch as the arrangement pitch of the branch modules.

[0011]

In the present invention, the extra length of the optical fiber cord or the tape cord is individually wound by the take-up reel provided between the branch module mounting space and the cable mounting space to perform the full length processing. Since it is possible to manage the optical fiber cords or tape cords connected to them according to the branch module, it is difficult to apply unreasonable force to the optical fiber cords during mounting,
Moreover, after mounting, even if the wiring of only some of the optical fiber cords is replaced, the wiring replacement work can be performed very easily.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an optical wiring rack according to the present invention, in which (a) is a front view and (b) is a side sectional view. In these drawings, the same components as those described in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

The optical wiring rack 1 of the present invention includes a branch module mounting space 20 for accommodating a large number of branch modules 5.
A cable total length processing space 21 and a cable mounting space 22 for accommodating an external cable and an internal cable are formed in order from the upper side to the lower side.

The branch module mounting space 20 has a plurality of shelves 2a, ...
The branching modules 5, ... Are arranged on the upper side of. Further, here, the branch modules 5, ... Are accommodated by using the entire lateral width from one side of the optical wiring rack 1 to the other side. Similar to the conventional one, the terminal board 11 is fixed to the opening of each step of the branch module mounting space 20, and the adapters 12 of the branch modules 5, ... Are arranged and fixed to the terminal board 11. Is.

In the cable total length processing space 21,
The winding reels 25 and 26 are detachably arranged on the front side and the back side, respectively. The take-up reel 25 on the front side is
The winding reel 26 on the back side is for winding the optical fiber cord 13 for winding an extra length of the optical fiber cord 13 coated with the optical fiber core wire 10 extending from the adapter 12 of the branching module 5. It is used for winding the tape cord for winding the extra length of the tape cord 8 extending from the module 5.

Further, both winding reels 25, 26
Are arranged at the same pitch as the arrangement pitch of the branch modules 5. Therefore, for example, in the optical fiber cord winding reel 25, the two upper and lower shelves 2 positioned above the reel 25
The extra length of the optical fiber cord 13 extending from the adapter 12 of each branching module 5 on a is wound up, and in the tape cord winding reel 26, each branching on the upper and lower two shelves 2a located above it. The extra length of tape cord 8 extending from the module 5 is wound.

An example of the take-up reel 25 (26) is shown in FIG. The take-up reel 25 (26) is formed by attaching flanges 28, 28 to both ends of a cylindrical reel body 27. One of the flanges 28 is removable, and the reel body 27 is provided with elliptical cord stoppers 29, 29 that are branched to the left and right. For example, when the extra length of the optical fiber cord is wound around the take-up reel 25, one flange 28 is removed and the optical fiber cord 13 is provided between the cord stoppers 29, 29.
After passing through, the removed one flange 28 is covered again, and the extra length of the optical fiber cord 13 is wound around the winding reel 25.

The take-up reel 25 (26) is removably incorporated into a reel holder 30 fixed at a predetermined position in the cable full length processing space 21.
The reel holder 30 is a substantially U-shaped member made of a material such as ABC resin that is lightweight and has a certain degree of rigidity, and the width dimension of the U-shaped opening 31 is the take-up reel 25 (26). It is formed slightly larger than the outer diameter of the reel body. The reel holder 30 is formed to have a thickness smaller than the distance between the inner surfaces of the flange portions 28 of the winding reel 25 (26). On one side opening end 31a of the reel holder 30, a locking claw 33 is provided so as to project toward the opposite side opening end 31b of the U-shaped opening. The locking claw 33 is formed in a triangular shape with its apex directed toward the other-side open end 31b. Top of locking claw 33 and open end 31 on the other side
The distance from b is slightly shorter than the diameter of the reel body 27 of the take-up reel 25 (26). The other-side open end 31b is formed in a straight rod shape. The open end portions 31a and 31b on the one side and the other side are
A fiber insertion groove 34 is formed so as to cut from each tip toward the base end.

The take-up reel 25 (2) is provided in the cable mounting space 22 located at the bottom of the optical wiring rack 1.
The optical fiber cords 13 extending further downward from 6) are bundled while being divided into several parts to form an intra-station optical cable 9, from which the intra-station optical cable is led to an external transmission device or the like. In addition, the winding reel 2
A tape cord 8 extending further downward from 6 is bundled to form an outside office optical cable 7, and the outside office optical cable 7 is pulled out to the outside.

In the optical wiring rack having the above structure, however, the branch module mounting space 20 and the cable mounting space 2
The extra length of the optical fiber cord 13 or the tape cord 8 is individually wound by the take-up reel 25 (26) provided between the branching modules 5 and so on. Since the optical fiber cord 13 or the tape cord 8 can be managed, it is difficult to apply an unreasonable force to the optical fiber cord 13 or the tape cord 8 during mounting, and thus it is possible to prevent them from breaking during mounting.

In addition, after mounting, for example, when wiring is changed only for a part of the optical fiber cords 13,
By taking out the take-up reel 25 from the holder 30, only the required optical fiber cord 13 can be taken out without affecting the other optical fiber cords 13, and the wiring change operation can be easily performed.

The optical wiring rack according to the present invention is not limited to the above-described embodiment, and the branch module mounting space 20,
The specific structure of the cable total length processing space 21 and the like can be appropriately changed in implementation. For example, in the above embodiment, the branch module mounting space 20, the cable total length processing space 21, and the cable mounting space 22 are arranged side by side in the vertical direction, but the present invention is not limited to this, and they may be arranged side by side in the horizontal direction. Good. Further, in the above-described embodiment, the branch modules 5, ... Are provided in the upper and lower two stages, but the present invention is not limited to this, and they may be arranged in only one stage or in a stack of three or more stages.

[0023]

According to the present invention, the extra length of the optical fiber cord or the tape cord is individually wound by the winding reel of the cable full length processing space provided between the branch module mounting space and the cable mounting space. Since it is possible to manage the optical fiber cords or tape cords connected to them according to the branch module, it is difficult to apply an unreasonable force to the optical fiber cords, etc. during mounting, thus preventing them from breaking. Further, after mounting, even if the wiring of only some of the optical fiber cords is changed, the replacement work can be performed very easily. Also, by arranging the take-up reels at the same pitch as the arrangement pitch of the branch modules, it is possible to manage the optical fiber cords or the tape cords in a one-to-one relationship corresponding to each branch module, which facilitates mounting work. Not only can this be done more easily, but wiring replacement work is also easier.

[Brief description of the drawings]

1A and 1B show an optical wiring rack according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a side sectional view.

FIG. 2 is a perspective view of a take-up reel and a reel holder.

FIG. 3 is a front view of a conventional optical wiring rack.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical wiring rack, 5 ... Branch module, 7 ... Out-of-office optical cable, 8 ... Tape cable, 9 ... In-station optical cable, 10 ... Optical fiber core wire, 12 ... Adapter, 13 ... Optical fiber code, 20 ... Branch module mounting space , 21 ... Cable full length processing space, 22 ... Cable mounting space, 2
5 ... Optical fiber cord winding reel, 26 ... Tape cord winding reel, 27 ... Reel body, 28 ... Flange, 30 ... Reel holder.

Claims (4)

[Claims] 1. An optical wiring rack (1) for branch-connecting an optical cable (7) to an optical fiber core wire (10) by optical connector connection, which is led out from the optical cable through an optical connector for branch connection. Branch module mounting space (20) for accommodating a large number of branch modules (5) connecting the tape cord (8) and the optical fiber core wire (10), and an external cable and an optical fiber core formed by the optical cable A cable total length processing space (21) between the cable mounting space (22) for accommodating the intra-station cable (9) that bundles the wires
A plurality of optical fiber cord winding reels (25) for winding an extra length of the optical fiber cord (13) coated with the optical fiber core wire are provided in the cable total length processing space. Optical wiring rack characterized by that. 2. The optical wiring rack according to claim 1, wherein the cable full length processing space is replaced with a tape cord winding reel for winding an extra length of the tape cord instead of the optical fiber cord winding reel. An optical wiring rack comprising a plurality of reels (26). 3. The optical wiring rack according to claim 1, wherein, in the cable total length processing space, in addition to the optical fiber cord winding reel, a tape cord winding reel for winding an extra length of the tape cord is provided. An optical wiring rack characterized in that a plurality of optical wiring racks are provided. 4. The optical wiring rack according to any one of claims 1 to 3, wherein the winding reels are arranged at the same pitch as the arrangement pitch of the branching modules.