JP3392389B2 - Extra storage tray, optical fiber cable connection box and extra storage method for optical fiber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surplus length storage tray for accommodating a surplus length of an optical fiber core with a predetermined bending radius. The present invention also relates to an optical fiber cable connection box having such an extra length storage tray. Further, the present invention relates to a method for storing an extra length of an optical fiber using such an extra length storage tray.

[0002]

2. Description of the Related Art Conventionally, as techniques in such a field, there are JP-A-2000-56141 and JP-A-10-33294.
There is No. 5 publication. The extra length storage trays described in these publications are configured such that an optical fiber core wire is looped in the tray to maintain the extra length while maintaining a predetermined bending radius. Further, as an optical fiber cable connection box having an extra length storage tray laminated in multiple stages, there is disclosed in Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 127341.

[0003]

However, the above-mentioned conventional extra length storage tray has the following problems. That is, the plurality of optical fiber core wires exposed from the end of the optical fiber cable are bundled with a predetermined number of bundle cords, the bundle cord, in leading the optical fiber core wires to the extra length storage tray, In reality, it was cut off at the end of the optical fiber cable as unnecessary.

The present invention has been made to solve the above problems, and in particular, an extra length storage tray, an optical fiber cable splicing box, and an optical fiber extra length storage method for effectively utilizing a bundle cord. The purpose is to provide.

[0005]

A surplus length storage tray according to the present invention is a surplus length storage tray for accommodating surplus lengths of a plurality of optical fiber core wires, in which a plurality of optical fiber core wires are bundled with a bundle cord. The optical fiber bundle is provided on the optical fiber inlet side of the extra length accommodating portion for accommodating the extra length as an individual optical fiber core wire in a state where the bundle is removed from the optical fiber bundle. And a bundle string fixing portion for stopping a tip end portion of the bundled string.

This extra length storage tray is designed to make effective use of a bundle cord which has not been noticed until now. This bundle cord is a predetermined number of optical fiber core wires in an optical fiber cable. In addition to the function of bundling each fiber, it is possible to color-code each optical fiber bundle that is exposed from the end of the optical fiber cable with a variety of colors so that the optical fiber core exposed from the cable can be distinguished. It is a thing. The present invention focuses on such characteristics of the bundle cord. That is, by providing the bundle cord fastening portion on the optical fiber introduction port side of the extra length storage tray, the bundle cord is guided to the extra length storage tray in a state where the optical fiber cores are bundled, and as a result, the optical fiber cores Does not collapse during the crawling, and a reliable crawling of the optical fiber core wire is achieved. Further, since the bundle cord is stopped at the optical fiber introduction port side of the extra length storage tray, the optical fiber core wire is not crossed on the optical fiber introduction port side of the extra length storage tray and is also effective in preventing disconnection. Target. In addition, when the bundled cord is colored, the operator holds the colored bundled cord on the extra length storage tray so that the operator can use the color of the bundled cord as a mark to determine which optical fiber core wire is in the extra length storage tray. You can easily identify whether or not. In particular, when the extra length storage trays are stacked and used in multiple stages, the use of color-coded bundle cords enhances the distinguishability of each tray.

Further, it is preferable that the bundle cord fastening portion is a winding pin which is provided upright on the outer frame forming the extra length accommodation portion on the optical fiber introducing port side. When such a configuration is adopted, the bundle cord can be fixed to the extra length storage tray by a simple operation of winding the bundle cord around the winding pin.

Further, it is preferable that the winding pin is formed with a vertical slit for hooking and fixing the bundle cord. When such a configuration is adopted, by inserting the tip portion of the bundle cord into the vertical slit, the bundle cord can be more easily and surely fixed.

The optical fiber cable splicing box according to the present invention is an optical fiber cable splicing box having an extra length storage tray for storing an extra length of a plurality of optical fiber core wires exposed from the end of the optical fiber cable. The storage tray consists of an extra length storage section for storing an optical fiber bundle obtained by bundling a plurality of optical fiber core wires with a bundle cord as an individual optical fiber core wire in a state of being removed from the bundle cord, and an extra length storage section. It is characterized in that it is provided on the side of the optical fiber introduction port, and provided with a bundle string fastening portion for stopping the tip end portion of the bundle string detached from the optical fiber bundle.

The extra length storage tray applied to this optical fiber cable connection box is intended to make effective use of a bundle cord which has not been noticed until now. This bundle cord is used in the optical fiber cable. Not only has the function of bundling a predetermined number of optical fiber cores with each other, but color coding is also performed for each optical fiber bundle exposed from the end of the optical fiber cable by various colors, and the optical fiber cores exposed from the cable can be distinguished. It is intended to have. The present invention focuses on such characteristics of the bundle cord. That is, by providing the bundle cord fastening portion on the optical fiber introduction port side of the extra length storage tray, the bundle cord is guided to the extra length storage tray in a state where the optical fiber core wires are bundled in the optical fiber cable connection box. Therefore, the bundle of optical fiber cores does not collapse during the crawl,
Reliable crawling of the optical fiber core in the optical fiber cable junction box is achieved. Further, since the bundle cord is stopped at the optical fiber introduction port side of the extra length storage tray, the optical fiber core wire is not mixed at the optical fiber introduction port side of the extra length storage tray and is also effective in preventing disconnection. Target. In addition, when the bundled cord is colored, the operator puts the colored bundled cord on the extra length storage tray, and the operator uses the color of the bundled cord as a mark to allow the operator to select which optical fiber core wire in the extra length storage tray. You can easily identify whether or not. In particular, when the extra length storage trays are stacked in multiple layers in the optical fiber cable connection box, the use of color-coded bundle cords enhances the identification of each tray.

Further, it is preferable that the bobbin is arranged adjacent to the optical fiber lead-out side of the extra length storage tray. When such a configuration is adopted, the optical fiber (optical fiber core wire or optical cord, etc.) led out from the extra length storage tray is wound around the bobbin a predetermined number of times, so that the Further extra length can be secured.

The method for accommodating an extra length of an optical fiber according to the present invention is an extra length accommodating optical fiber bundle obtained by bundling a plurality of optical fiber cords with a bundle cord as individual optical fiber cords in a state of being removed from the bundle cord. When the extra length is stored in the tray, the tip of the bundle cord detached from the optical fiber bundle is fixed to the bundle cord fixing portion provided on the optical fiber introduction port side of the extra length storage tray.

In this optical fiber processing method, since the bundle cord is guided to the extra length storage tray in a state where the optical fiber cores are bundled, the bundle of optical fiber cores does not collapse during the crawl, and Reliable crawling of the fiber core is achieved. In addition, since the bundle cord is fixed on the optical fiber introduction port side of the extra length storage tray, the optical fiber core wire does not mix with the optical fiber introduction port side of the extra length storage tray and also prevents disconnection. It is effective. In addition, when the bundled cord is colored, the operator holds the colored bundled cord on the extra length storage tray so that the operator can use the color of the bundled cord as a mark to determine which optical fiber core wire is in the extra length storage tray. You can easily identify whether or not. In particular, when the extra length storage trays are stacked in multiple layers, the use of color-coded bundle cords enhances the distinguishability of each tray.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an extra length storage tray, an optical fiber cable splicing box, and an optical fiber extra length storage method according to the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the optical fiber cable connection box 1 is of a wall-mounted type, and
It has a housing 2. The housing 2 is composed of an iron base plate 3 and a plastic lid 4 which are hung on a wall. In such a housing 2, an extra length storage tray 8 for storing an extra length of the optical fiber core wire 6 is provided in multiple stages (for example, 10).
Stacked). The end of each extra length storage tray 8
It is rotatably supported by the shaft pin P, and by this,
Each extra length storage tray 8 can be pulled out to the front side while rotating horizontally. Then, the worker pulls the extra length storage trays 8 in order from the top toward the front side, and stores the optical fiber core wires 6 in the extra lengths in the extra length storage trays 8.

Further, a bobbin 10 is arranged in the housing 2 on the optical fiber lead-out side of the extra length storage tray 8, and each bobbin 1 is provided.
Zeros are rotatably fixed to the base plate 3, and five pieces are arranged in one row, and there are two upper and lower stages.
As a result, the extra length storage tray 8 and the bobbin 10 are stored in the housing 2 in a one-to-one relationship. Therefore,
The optical cord 6A led out from each extra length storage tray 8 is wound around each bobbin 10 a predetermined number of times, whereby a further extra length of the optical fiber is secured in the optical fiber cable junction box 1. Become. One bobbin 1
A plurality of optical cords 6A may be wound around 0.

The optical fiber cable 9 is fixed below the one end of the optical fiber cable connection box 1 via a grip portion 11. On the other hand, the optical cords 6A extending from the bobbin 10 are led out to the outside from the lower side of the optical fiber cable splicing box 1 so as to be aligned in a line via the insertion fixing portion 12.

Here, in the optical fiber cable connection box 1, each optical fiber core wire 6 is connected to the optical fiber cable 9.
From the exposed end to the extra length storage tray 8 is wound around the bundle string 13 (see FIG. 4) in a bundled state.
The bundle string 13 is an optical fiber cable 9
In addition to the function of bundling a predetermined number of optical fiber cores 6 (for example, every 4 cores), color coding for each of the plurality of optical fiber bundles 14 exposed from the end of the optical fiber cable 9 is performed by various colors. The optical fiber core wire 6 exposed from the cable 9 is provided with distinguishability for each bundle (see FIG. 4).

As shown in FIG. 3, this extra length storage tray 8 is provided.
Is formed of a resin as a light weight thin rectangular container. Further, the extra length storage tray 8 is a flat base portion 1
The outer frame 18 is formed by 6 and the side wall 17 which is erected so as to surround the periphery of the base portion 16, and the inner side of the outer frame 18 serves as the extra length storage portion S. The extra length storage portion S is for accommodating a plurality of optical fiber core wires 6 in the extra length, and the base portion 1
6 is provided with a drum portion 19 for ensuring the minimum bending radius of the optical fiber core wire 6.

In such an extra length storage tray 8, the optical fiber core wire 6 exposed from the end of the optical fiber cable 9 is exposed.
An optical fiber introducing port 20 for introducing the optical fiber is provided at one end side. Further, on the other end side of the extra length storage tray 8,
Two adapter parts 21 are installed side by side so that the two socket parts 22 can be inserted from the inside. After each adapter part 21 is placed on the base part 16, it is fixed to the extra length storage tray 8 by pressing it from above with the pressing plate 30. In addition, at the time of wiring work,
The socket portion 22 is attached to the tip of each optical fiber core wire 6.

In this way, the optical fiber bundle 14 composed of a set of four optical fiber core wires 6 bundled by the bundle cord 13
Is guided to the extra length storage tray 8 for each bundle, and then, with the bundle cord 13 removed, each optical fiber core wire 6
Is crawled around the drum portion 19 in the extra length storage portion S. Then, by inserting each socket portion 22 into the adapter portion 21, the extra length accommodation work of each optical fiber core wire 6 is completed. In addition, another socket portion 27 provided with the optical cord 6A is inserted into the adapter portion 21 from the outside (see FIG. 2).

Here, attention is paid to the fact that the bundle cord 13 and the extra length storage tray 8 have a one-to-one relationship. Figure 4
As shown in FIG.
On the 0 side, the base 16 of the extra length storage S is provided with a winding pin 24 as a bundle cord fixing portion for stopping the tip portion of the bundle cord 13 detached from the optical fiber bundle 14. Further, the winding string 24 is attached to the winding pin 24.
A vertical slit 25 for hooking and fixing 3 is formed.

By adopting such a winding pin 24,
The bundle cord 13 guided to the extra length storage tray 8 is fixed by a simple operation of winding it around the winding pin 24, and by inserting the tip portion of the bundle cord 13 into the vertical slit 25 from above, The bundle string 13 is securely prevented from coming off. Therefore, since the bundle string 13 can guide the optical fiber core wires 6 to the extra length storage tray 8 in a bundled state, the optical fiber bundles 14 do not collapse during the crawling work, and the optical fiber core wires 6 do not collapse. Reliable crawling of is achieved.

Since the bundle cord 13 is fixed on the optical fiber introduction port 20 side of the extra length storage tray 8, the optical fiber core wire 6 is attached to the optical fiber introduction port 2 of the extra length storage tray 8.
There is no cross-linking on the 0 side, and it is also effective in preventing disconnection. In addition, when the bundle cord 13 is colored, the worker puts the colored bundle cord 15 on the extra length storage tray 8 by stopping the colored bundle cord 15 on the extra length storage tray 8. It is possible to easily identify which optical fiber core wire 6 is contained. In particular,
Also, as shown in FIG. 2, the extra length storage tray 8 has multiple stages (10
1) color-coded bundle string 1
Since No. 3 is fixed to each extra length storage tray 8 for each color, the wiring confirmation work becomes extremely convenient.

Next, a method of accommodating an extra length of an optical fiber using the above-mentioned optical fiber cable connection box 1 will be described.

First, a large number of optical fiber core wires 6 are exposed from the ends of the optical fiber cable 9. In this state, the lid 2 of the optical fiber cable connection box 1 is removed, and the end of the optical fiber cable 9 is screwed to the grip 11. At this time,
The optical fiber core wire 6 is in a state of being wound with the bundle string 13. Then, each socket 22 is attached to the tip of each optical fiber core wire 6. Then, the bundle string 13 is removed from each optical fiber bundle 14 bundled by the bundle string 13,
The four optical fiber core wires 6 are stored independently in the extra length storage tray 8. At this time, the bundle string 13
Is tightly wound around the winding pin 24 provided on the optical fiber introduction port 20 side of the extra length storage tray 8, and in that state, the tip portion of the bundle cord 13 is inserted into the vertical split slit 25 from above. , Bundle string 13 with extra length storage tray 8
Fixed to.

Such work is carried out in order from the top for each extra length storage tray 8 of each stage while rotating the extra length storage tray 8 toward the front side. As a result, the color-coded bundle string 13 is attached as an identification mark for each extra length storage tray 8. As a result, different colors of the bundle cord 13 serve as a mark, and the operator can easily identify which optical fiber core wire 6 is contained in which stage of extra length storage tray 8. In this way, the extra length storage in the extra length storage tray 8 is completed.

After that, the sockets 27 are inserted into the respective adapters 21 attached to the extra length storage trays 8 from the outside, and the optical cords 6A led out from the respective sockets 27 are given to the predetermined bobbins 10 at predetermined intervals. Wrap it many times. Then, each optical cord 6A extending from the bobbin 10 is
The optical cords 6A are aligned in a line through the insertion fixing portion 12, and in this aligned state, the optical cords 6A are led out from the optical fiber cable junction box 1 to the outside. And the lid 2 that was removed
The wiring work of the optical fiber cable connection box 1 is completed by fitting the to the base plate 3.

The present invention is not limited to the above embodiment. For example, when two or more optical fiber bundles 14 are introduced into the extra length storage tray 8, the two or more bundle cords 13 are wound and fixed on the winding pins 24. In addition, the end of the optical fiber core wire 6 is the socket portion 22.
In the above description, the socket portions 22, 27 have been described.
Alternatively, the optical fiber core wire 6 and the optical cord 6A may be fusion-spliced in the extra length storage tray 8 without using the adapter portion 21.

[0030]

Since the extra length storage tray according to the present invention is constructed as described above, the following effects can be obtained. That is, in the extra length storage tray for storing the extra length of the plurality of optical fiber cores, the optical fiber bundle obtained by bundling the plurality of optical fiber cores with the bundle cord An extra length accommodating portion for accommodating an extra length as a core wire, and a bundle cord fixing portion that is provided on the optical fiber introduction port side of the extra length accommodating portion and that stops the tip portion of the bundle cord detached from the optical fiber bundle are provided. As a result, the bundle cord can be effectively used in the extra length storage tray. For example, the bundle of optical fiber cores does not collapse during the crawling, and reliable crawling of the optical fiber cores in the optical fiber cable connection box is achieved.
In addition, the optical fiber core wire does not mix at the optical fiber introduction port side of the extra length storage tray, and is also effective in preventing disconnection. Moreover, when the bundle cord is colored, the operator can easily identify which optical fiber core wire is in the extra length storage tray by using the color of the bundle cord as a mark.

The optical fiber cable splicing box according to the present invention is an optical fiber cable splicing box having an extra length storage tray for storing an extra length of a plurality of optical fiber core wires exposed from the ends of the optical fiber cable. The long storage tray is an extra length storage section for storing an extra length of an optical fiber bundle obtained by bundling a plurality of optical fiber cores with a bundle cord as individual optical fiber core wires in a state of being removed from the bundle cord, and an extra length storage section. In addition to being provided on the side of the optical fiber introduction port of the optical fiber bundle and having a bundle cord fastening portion for stopping the tip end portion of the bundle cord detached from the optical fiber bundle, it is possible to effectively use the bundle cord in the optical fiber cable connection box. Will be done. For example, the bundle of optical fiber cores does not collapse during the crawling, and reliable crawling of the optical fiber cores in the optical fiber cable connection box is achieved. In addition, the optical fiber core wire does not mix at the optical fiber introduction port side of the extra length storage tray, and is also effective in preventing disconnection.
Moreover, when the bundle cord is colored, the operator can easily identify which optical fiber core wire is in the extra length storage tray by using the color of the bundle cord as a mark.

Further, according to the method of accommodating the extra length of the optical fiber of the present invention, the optical fiber bundle obtained by bundling a plurality of optical fiber core wires with the bundle cord is removed as an individual optical fiber core wire in a state of being removed from the bundle cord. When storing an extra length in the long storage tray, a method for fixing the tip end portion of the bundle cord removed from the optical fiber bundle to the bundle cord fastening portion provided on the optical fiber introduction port side of the extra length storage tray, by this,
The bundle strings will be effectively used. For example,
The bundle of optical fiber cores does not collapse during the crawling, and reliable crawling of the optical fiber cores in the optical fiber cable connection box is achieved. In addition, the optical fiber core wire does not mix at the optical fiber introduction port side of the extra length storage tray, and is also effective in preventing disconnection. Moreover, when the bundle cord is colored, the operator can easily identify which optical fiber core wire is in the extra length storage tray by using the color of the bundle cord as a mark.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an optical fiber cable junction box according to the present invention.

FIG. 2 is a front view showing the internal structure of the optical fiber cable junction box according to the present invention.

FIG. 3 is a plan view showing an embodiment of an extra length storage tray according to the present invention.

FIG. 4 is an enlarged perspective view of a main part of FIG.

[Explanation of symbols]

1 ... Optical fiber cable connection box, 6 ... Optical fiber core wire,
8 ... extra length storage tray, 9 ... optical fiber cable, 10 ...
Bobbin, 13 ... Bundle string, 14 ... Optical fiber bundle, 18
... Outer frame, 20 ... Optical fiber introduction port, 24 ... Winding pin (bundle string fastening part), 25 ... Vertical slit, S ... Extra length storage part.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuya Iwamoto 1-226 East, Komaki-shi, Aichi Nippon Telecommunication Materials Co., Ltd. (56) Reference JP-A-8-292331 (JP, A) JP-A-10-319284 ( (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02B 6/00 G02B 6/24 G02B 6/36-6/40

Claims (6)

(57) [Claims] 1. An extra length storage tray for accommodating extra lengths of a plurality of optical fiber core wires, wherein an optical fiber bundle obtained by bundling the plurality of optical fiber core wires with a bundle cord is removed from the bundle cord. With an extra length storage section for storing an extra length as each of the optical fiber core wires, and a tip end portion of the bundle string detached from the optical fiber bundle while being provided on the optical fiber introduction port side of the extra length storage section. An extra length storage tray, which is provided with a bundle string stop portion for stopping. 2. The bundle cord fastening portion is a winding pin which is erected on an outer frame forming the extra length storage portion on the optical fiber introduction port side.
Extra length storage tray described. 3. The extra length storage tray according to claim 2, wherein the winding pin is formed with a vertical slit for hooking and fixing the bundle cord. 4. An optical fiber cable splicing box having an extra length storage tray for storing an extra length of a plurality of optical fiber core wires exposed from the end of the optical fiber cable, wherein the extra length storage tray comprises a plurality of the optical fibers. An optical fiber bundle obtained by bundling fiber core wires with a bundle cord, an extra length storage unit for storing an extra length as each of the optical fiber core wires in a state of being removed from the bundle cord, and an optical fiber introduction port of the extra length storage unit An optical fiber cable splicing box, which is provided on a side of the optical fiber bundle, and which includes a bundle string fastening portion for stopping a tip end portion of the bundle string removed from the optical fiber bundle. 5. The optical fiber cable connection box according to claim 4, wherein a bobbin is arranged adjacent to the optical fiber lead-out side of the extra length storage tray. 6. When an optical fiber bundle obtained by bundling a plurality of optical fiber core wires with a bundle cord is stored as extra length in an extra length storage tray as the individual optical fiber core wires in a state of being removed from the bundle cord, A method for storing an extra length of an optical fiber, characterized in that a tip end portion of the bundle cord detached from the optical fiber bundle is fixed to a bundle cord fixing portion provided on the optical fiber introduction port side of the extra length storage tray. .