JPH04269703A - Optical pull-down connecting box - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an optical connection box used in an optical line for subscribers.

0002

2. Description of the Related Art FIG. 3 shows the structure of a conventional optical debit connection box. As shown in the figure, optical fiber cables 2 and 3 forming a subscriber optical line wiring network are connected to both ends of an optical connection box (connection box) 1, and some of the optical fiber cables 2 and 3 are The optical fibers are connected to each other by fusion splicing or the like with an extra length secured in an extra length processing section 4 inside the connection box 1. Since some of the other optical fibers of the optical fiber cables 2 and 3 are pulled down by the subscriber, the optical outdoor line 7 is protected and restrained by the guide pipe 5, passes through the bottom plate part 6, and is drawn into the inside of the connection box 1. It is connected to the. In addition, 8 in the figure is a cover of the connection box 1. The above-mentioned connection box 1 connects the optical fibers of the optical fiber cables 2 and 3 to form a subscriber optical line wiring network, and also connects the optical fibers to the optical outdoor line 7 to be withdrawn by the subscriber. Ru.

0003

[Problem to be solved by the invention] In the conventional connecting box 1,
Connecting the optical fibers of the optical fiber cables 2 and 3,
The connection of the optical fiber to the outdoor optical line 7 is performed internally. For this reason, it is necessary to install the optical fiber cables 2 and 3 and the outdoor optical line 7 separately, or to connect the optical fiber to the new outdoor optical line 7 after constructing the subscriber optical line. If you do this, place the cover 8 of connection box 1 on the pillar again.
It was necessary to remove the cable and perform connection work for withdrawal.

0004

[Means for Solving the Problems] The configuration of the present invention for solving the above problems is to provide an overhead optical line for dropping an optical outdoor line from an optical fiber cable forming a distribution network of subscriber optical lines to a subscriber's home. The optical connection box is installed on a railroad track, and is characterized in that a connector for connecting to the optical outdoor line is attached downward to the bottom plate, and the connector is projected to the outside.

[0005]

[Operation] To connect the outdoor optical line and the optical fiber of the optical fiber cable, the outdoor optical line is connected from the outside of the optical connection box via a connector attached to the bottom plate part so as to protrude downward.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a perspective view of an optical withdrawal connection box according to a first embodiment of the present invention. As shown in the figure, optical fiber cables 22 and 23 forming a subscriber optical line wiring network are connected to both sides of the optical withdrawal connection box (connection box) 21, and some of the optical fiber cables 22 and 23 are connected to both sides of the optical withdrawal connection box (connection box) 21. The optical fibers are connected to each other by fusion splicing or the like with an extra length secured in an extra length processing section 24 inside the connection box 21. Bottom plate part 21 of connection box 21
A connector 25 is attached downward, and the connector 2
5 protrudes to the outside of the connection box 21. Optical fibers 22a and 23a of the optical fiber cables 22 and 23 to be dropped by the subscriber are pulled out from the surplus length processing section 24 and connected to the connector 25. A connector 27 connected to the connector 25 is attached to the tip of the optical outdoor line 26 on the subscriber's home side, and by connecting the connectors 25 and 27, the optical fiber cables 22 and 23 are connected to the subscriber. The fibers 22a and 23a are connected to an optical outdoor line 26 outside the connection box 21. In the above embodiment, the optical fibers 22a and 23a of the optical fiber cables 22 and 23 are connected to the connector 25 via the extra length processing section 24, but it is also possible to connect them directly to the connector 25 inside the connection box 21. It is also possible to interpose other connectors.

When the above-mentioned connection box 21 is used, by connecting the connectors 25 and 27, the optical fibers 2 of the optical fiber cables 22 and 23 to be connected to the subscriber are connected.
2a and 23a are connected to the optical outdoor line 26 outside the connection box 21. Generally, the optical outdoor line 26 accommodates two optical fibers, so the optical fibers 22a and 23a to be dropped are
In the case of a tape core wire having 4 or 8 fibers, the connector 25 may have a function of branching into 2 fibers x 2 or 2 fibers x 4. In addition, the connector 25,
27 can be attached and detached. In this case, the connector 25 on the connection box 21 side is connected to the connector 2 on the optical outdoor line 26 side.
It is desirable to provide a guide member for 7.

In the connection box 21 described above, the connector 25 is attached to the bottom plate portion 21a facing downward, and the connector 25 protrudes from the outside of the connection box 21, so that connection to the optical outdoor line 26 can be made without opening the connection box 21. is possible. Further, by attaching the connector 27 of the optical outdoor line 26 to the tip of a long rod and targeting the connector 25 on the connection box 21 side, the connectors 25 and 27 can be easily attached and detached from the ground. In addition, when the connector 25 on the connection box 21 side is provided with an optical fiber branching function, the connector 25 becomes large, but since the connector 25 protrudes to the outside of the connection box 21, the inside of the connection box 21 can be effectively utilized. be able to. Moreover, since the connector 25 protrudes downward, even if water should accumulate inside the connection box 21, the connector 25 will not be completely submerged in water.

Next, a second embodiment of the present invention will be described. Figure 2
2 shows a perspective view of an optical withdrawal connection box according to a second embodiment of the present invention. Note that the same members as those shown in FIG. 1 are given the same reference numerals and redundant explanations will be omitted. As shown in the figure,
Optical fiber cables 22 are installed on both sides of the optical connection box 31.
, 23 are connected. The connector 25 is attached to the bottom plate portion 21a of the connection box 21 in a downward direction via a feeding mechanism 32, and by rotating a rotating drum 33 of the feeding mechanism 32, the connector 25 is fed out downward. Fiber optic cable 2 for being withdrawn by subscribers
The second and third optical fibers 22a and 23a are connected to a connector 25 via a rotary connector 34. A hook 35 is attached to the connector 25, which is used to extend the connector 25 from the ground.

When the above-mentioned connection box 31 is used, the connector 25 is fed out to the ground via the hook 35, and the connectors 25 and 27 are connected on the ground, thereby allowing the optical fiber cable 22 to be pulled down by the subscriber. , 23, the optical fibers 22a and 23a are connected to the optical outdoor line 26 on the ground (see Fig. 1).
connected to.

The connection box 31 described above is connected to the connector 2 on the ground.
5 and 27 can be connected, work efficiency is dramatically improved.

0012

[Effects of the Invention] In the optical debit connection box of the present invention, the connector for connecting to the optical outdoor line is attached downward to the bottom plate, and this connector is made to protrude to the outside. Can be connected to optical outdoor line. As a result, it is possible to connect to the optical outdoor line without opening the optical debit connection box, improving the efficiency of the debit work. Additionally, connection via remote control is also possible. Further, the interior of the optical debit connection box can be effectively utilized, and even if water accumulates inside the optical debit connection box, the connector will not be submerged in water.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an optical withdrawal connection box according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an optical withdrawal connection box according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional optical withdrawal connection box.

[Explanation of symbols]

21, 31 Optical withdrawal connection box (connection box) 21a Bottom plate parts 22, 23 Optical fiber cable 24 Excess length processing part 25 Connector 26 Optical outdoor line 27 Connector 32 Feeding mechanism

Claims (1)

[Claims] 1. An optical dropout connection box installed on an overhead line for dropping an optical outdoor line from an optical fiber cable forming a distribution network of a subscriber optical line to a subscriber's home, the box comprising: Attach the connector to be connected to the bottom plate facing downward,
An optical withdrawal connection box characterized in that the connector protrudes to the outside.